Trane Force-Flo, UniTrane Installation, Operation And Maintenance Instructions

Installation, Operation, and

Maintenance

UniTrane™ Fan-Coil and

Force-Flo™ Air Conditioners

200 to 1,200 cfm

Models FC and FF

“ZO” and later design sequence

Low vertical models FCKB and FCLB

“SO” and later design sequence

July 2010

UNT-SVX07B-EN

Warnings, Cautions and Notices

Warnings, Cautions and Notices.

Note that warnings, cautions and notices appear at appropriate intervals throughout this manual. Warnings are provide to alert installing contractors to potential hazards that could result in personal injury or death. Cautions are designed to alert personnel to hazardous situations that could result in personal injury, while notices indicate a situation that could result in equipment or property-damage-only accidents.

Your personal safety and the proper operation of this machine depend upon the strict observance of these precautions.

ATTENTION:

Warnings, Cautions and Notices appear at appropriate sections throughout this literature. Read these carefully.



WARNING:

Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.



CAUTION:

Indicates a potentially hazardous situation which, if not avoided, could result in minor or moderate injury. It could also be used to alert against unsafe practices.

NOTICE

:

Indicates a situation that could result in equipment or property-damage only accidents.

Important

Environmental Concerns!

Scientific research has shown that certain man-made chemicals can affect the earth’s naturally occurring stratospheric ozone layer when released to the atmosphere. In particular, several of the identified chemicals that may affect the ozone layer are refrigerants that contain Chlorine, Fluorine and Carbon (CFCs) and those containing Hydrogen, Chlorine, Fluorine and Carbon (HCFCs). Not all refrigerants containing these compounds have the same potential impact to the environment.

Trane advocates the responsible handling of all refrigerants-including industry replacements for

CFCs such as HCFCs and HFCs.

Responsible Refrigerant Practices!

Trane believes that responsible refrigerant practices are important to the environment, our customers, and the air conditioning industry. All technicians who handle refrigerants must be certified. The Federal Clean Air Act (Section 608) sets forth the requirements for handling, reclaiming, recovering and recycling of certain refrigerants and the equipment that is used in these service procedures. In addition, some states or municipalities may have additional requirements that must also be adhered to for responsible management of refrigerants. Know the applicable laws and follow them.

SAFETY WARNING

Only qualified personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating, and air-conditioning equipment can be hazardous and requires specific knowledge and training. Improperly installed, adjusted or altered equipment by an unqualified person could result in death or serious injury. When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that are attached to the equipment.

© 2010 Trane All rights reserved UNT-SVX07B-EN

Warnings, Cautions and Notices



WARNING

Personal Protective Equipment (PPE) Required!

Installing/servicing this unit could result in exposure to electrical, mechanical and chemical hazards.

• Before installing/servicing this unit, technicians MUST put on all Personal Protective

Equipment (PPE) recommended for the work being undertaken. ALWAYS refer to appropriate

MSDS sheets and OSHA guidelines for proper PPE.

• When working with or around hazardous chemicals, ALWAYS refer to the appropriate MSDS sheets and OSHA guidelines for information on allowable personal exposure levels, proper respiratory protection and handling recommendations.

• If there is a risk of arc or flash, technicians MUST put on all necessary Personal Protective

Equipment (PPE) in accordance with NFPA70E for arc/flash protection PRIOR to servicing the unit.

Failure to follow recommendations could result in death or serious injury.



WARNING

Proper Field Wiring and Grounding Required!

All field wiring MUST be performed by qualified personnel. Improperly installed and grounded field wiring poses FIRE and ELECTROCUTION hazards. To avoid these hazards, you MUST follow requirements for field wiring installation and grounding as described in NEC and your local/ state electrical codes. Failure to follow code could result in death or serious injury.

UNT-SVX07B-EN

Trademarks

Force-Flo, Trane, the Trane logo, and UniTrane are trademarks of Trane in the United States and other countries. All trademarks referenced in this document are the trademarks of their respective owners.

3

4

Table of Contents

Model Number Descriptions

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

General Information

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Pre-Installation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Receiving and Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Jobsite Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Installation Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Service Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Pre-Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Dimensions and Weights

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Available Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Factory-Installed Piping Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Vertical Concealed, Model A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Vertical Cabinet, Model B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Horizontal Concealed, Model C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Horizontal Cabinet, Model D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Horizontal Recessed, Model E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Vertical Wall Hung Cabinet, Model F (Force-Flo Units Only) . . . . . . . . . . 23

Vertical Recessed, Model H . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Vertical Slope Top, Model J . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Low Vertical Concealed, Model K . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Low Vertical Cabinet, Model L . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Inverted Vertical Cabinet, Model M (Force-Flo Units Only) . . . . . . . . . . . 28

Inverted Vertical Recessed, Model N (Force-Flo Units Only) . . . . . . . . . . 29

Fan-Coil Coil Connections, Vertical Units . . . . . . . . . . . . . . . . . . . . . . . . . 30

Fan-Coil Coil Connections, Horizontal Units . . . . . . . . . . . . . . . . . . . . . . . 30

Force-Flo Coil Connections, Vertical Units . . . . . . . . . . . . . . . . . . . . . . . . 31

Force-Flo Coil Connections, Horizontal Units . . . . . . . . . . . . . . . . . . . . . . 31

Force-Flo Coil Connections, Inverted Units . . . . . . . . . . . . . . . . . . . . . . . . 32

Fresh Air Opening Locations, Horizontal Units—Models C, D, and E . . . 33

Fresh Air Opening Locations, Vertical Units—Models A, B, F, H, J, K, L, M, and N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Wall Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Projection Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Installation—Mechanical

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Duct Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Piping Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Installation—General

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Installing the Unit

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Vertical Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Horizontal Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Cabinet Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Recessed Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Installation Checklist

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

UNT-SVX07B-EN

UNT-SVX07B-EN

Installation—Controls

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

General Information

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Control Options (Including Factory-Installed) . . . . . . . . . . . . . . . . . . . . . . 52

Installing Wall-Mounted Wired Sensors

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Location Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Fan Mode Switch Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Wired Zone Sensor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Installing Wall-Mounted Wireless Zone Sensors

. . . . . . . . . . . . . . . . . . . . . . 56

General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

Location Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Mounting the Sensor Back Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Replacing the Sensor Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Installation—Electrical

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Unit Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Supply Power Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Electrical Grounding Restrictions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Wall-Mounted Control Interconnection Wiring . . . . . . . . . . . . . . . . . . . . . 60

Controls Interface

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Wired Controllers—Communication Wiring

. . . . . . . . . . . . . . . . . . . . . . . . . . 67

Units with Tracer ZN510 and ZN520 Only . . . . . . . . . . . . . . . . . . . . . . . . . 67

Device Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Recommended Communication Wiring Practices . . . . . . . . . . . . . . . . . . 67

Wireless Temperature Sensor

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Address Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

Observing the Receiver for Readiness to Associate . . . . . . . . . . . . . . . . . 69

Associating the Sensor to the Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Testing Signal Strength and Battery Status . . . . . . . . . . . . . . . . . . . . . . . 70

Configuring the Wireless Display Sensor (Model WDS only) . . . . . . . . . 71

Replacing the Sensor Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Sensor Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Wireless Sensor Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Pre-Start

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Pre-Startup Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Start-Up

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Tracer™ ZN510 & ZN520 Unit Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Fan Mode Switch Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Tracer ZN010 & ZN510 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Tracer ZN520 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Sequence of Operation: Tracer ZN010 and ZN510

. . . . . . . . . . . . . . . . . . . . . 86

Binary Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

5

6

Binary Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Tracer ZN520 Sequence of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Cooling Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Heating Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Fan Mode Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Maintenance

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Maintenance Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Periodic Maintenance Checklists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Diagnostics

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

Troubleshooting

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Troubleshooting the Relay (Daughter) Board . . . . . . . . . . . . . . . . . . . . . 113

Troubleshooting Wireless Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

Troubleshooting Tracer ZN010, ZN510, and ZN520 . . . . . . . . . . . . . . . . 124

Wiring Diagrams

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

CSTI Fan Speed Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126

CSTI Non Fan Speed Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

Line Voltage Fan Speed Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128

Tracer ZN010 with Electric Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129

Tracer ZN510 with Main and Auxiliary Valves . . . . . . . . . . . . . . . . . . . . 130

ZN520 with 2-Stage Electric Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131

UNT-SVX07B-EN

Model Number Descriptions

Each UniTrane fan-coil and Force-Flo cabinet heater has a multiple character model number unique to that particular unit. To determine a unit’s specific options, reference the model number on the unit nameplate on the fan scroll. The unit nameplate also identifies the serial number, sales order number, and installation and operating specifications.

Following is a complete description of the fan-coil model number. Each digit in the model number has a corresponding code that identifies specific unit options.

Note:

Not all options are available on all cabinet styles. Contact your local Trane sales representative for more information.

Digits 1, 2 — Unit Type

FC = Fan-Coil

FF = Force-Flo

Digit 3 — Cabinet Type

A = Vertical Concealed

B = Vertical Cabinet

C = Horizontal Concealed

D = Horizontal Cabinet

E = Horizontal Recessed

H = Vertical Recessed

J = Vertical Cabinet Slope Top

K = Low Vertical Concealed

L = Low Vertical Cabinet

M = Inverted Vertical Cabinet

N = Inverted Vertical Recessed

Digit 4 — Development

Sequence “B”

Digits 5, 6, 7 — Unit Size

020

030

120

040

060

080

100

Digit 8 — Unit Voltage

1 = 115/60/1

2 = 208/60/1

3 = 277/60/1

4 = 230/60/1

9 = 220–240/50/1

Digit 9 — Piping System/

Placement

A = No piping, RH, No Auxiliary Drain

Pan

B = No piping, LH, No Auxiliary Drain

Pan

C = No piping, RH, with Auxiliary

Drain Pan

D = No piping, LH, with Auxiliary

Drain Pan

E = No piping, RH, No Auxiliary Drain

Pan, Extended End Pocket

F = No piping, LH, No Auxiliary Drain

Pan, Extended End Pocket

G = No piping, RH, with Auxiliary

Drain Pan, Extended End Pocket

H = No piping, LH, with Auxiliary

Drain Pan, Extended End Pocket

J = With piping package, RH

K = With piping package, LH

L = With piping package, RH,

Extended End Pocket

M = With piping package, LH,

Extended End Pocket

Digits 10, 11 — Design Sequence

Digit 12 — Inlets

A = Front Toe Space

B = Front Bar Grille

C = Front Stamped Louver

D = Bottom Stamped Louver

E = Bottom Toe Space

F = Back Duct Collar

G = Back Open Return

H = Back Stamped Louver

Digit 13 — Fresh Air Damper

0 = None

A = Manual, Bottom Opening

B = Manual, Back Opening

C = Manual, Top Opening

D = Auto, 2-Position, Bottom Opening

E = Auto, 2-Position, Back Opening

F = Auto, 2-Position, Top Opening

G = Auto, Economizer, Bottom

Opening

H = Auto, Economizer, Back Opening

J = Auto, Economizer, Top Opening

K = No Damper, Bottom Opening

L = No Damper, Back Opening

M = No Damper, Top Opening

Digit 14 — Outlets

A = Front Duct Collar

B = Front Bar Grille

C = Front Stamped Louver

D = Front Quad Grille

G = Top Quad Grille

H = Top Bar Grille

J = Top Duct Collar

Digit 15 — Color

0 = No Paint (Concealed Units Only)

1 = Deluxe Beige

2 = Soft Dove

3 = Cameo White

4 = Driftwood Grey

5 = Stone Grey

6 = Rose Mauve

Digit 16 — Tamperproof Locks/

Leveling Feet

0 = None

B = Keylock Access Door

C = Keylock Panel and Access Door

D = Leveling Feet

F = Keylock Access Door with

Leveling Feet

G = Keylock Panel and Access Door with Leveling Feet

Digit 17 — Motor

A = Free Discharge

B = High Static

Digit 18 — Coil

A = 2-Row Cooling/Heating

B = 3-Row Cooling/Heating

C = 4-Row Cooling/Heating

D = 2-Row Cooling/1-Row Heating

E = 2-Row Cooling/2-Row Heating

F = 3-Row Cooling/1-Row Heating

G = 2-Row Cooling Only

H = 3-Row Cooling Only

J = 4-Row Cooling Only

K = 2-Row Cooling/Heating with

Electric Heat

L = 3-Row Cooling/Heating with

Electric Heat

M = 4-Row Cooling/Heating with

Electric Heat

P = 2-Row Cooling/Heating with

1-Row Heating

Q = 2-Row Cooling/Heating with

2-Row Heating

R = 3-Row Cooling/Heating with

1-Row Heating

X = 2-Row Cooling Only, Electric Heat

Y = 3-Row Cooling Only, Electric Heat

Z = 4-Row Cooling Only, Electric Heat

Digit 19 — Drain Pan Material

3 = Polymer Drain Pan

4 = Stainless Steel Main Drain Pan

Digit 20 — Coil Air Vent

A = Automatic Air Vent

M = Manual Air Vent

UNT-SVX07B-EN 7

Model Number Descriptions

Digits 21, 22, 23 — Electric Heat kW — ( ) = 208 V Derate

000 = No Electric Heat

010 = 1.0 kW (0.75 kW)

015 = 1.5 kW (1.1 kW)

020 = 2.0 kW (1.5 kW)

025 = 2.5 kW (1.9 kW)

030 = 3.0 kW (2.3 kW)

040 = 4.0 kW (3.0 kW)

050 = 5.0 kW (3.8 kW)

060 = 6.0 kW (4.5 kW)

070 = 7.0 kW (5.3 kW)

080 = 8.0 kW (6.0 kW)

100 = 10.0 kW

Digit 24 — Reheat Coil

0 = None

A = Steam Coil

B = Hot Water Coil

D = High Capacity Hot Water Coil

Digit 25 — Disconnect Switch

0 = None

D = Disconnect Switch

Digit 26 — Filter

0 = None

1 = 1” Throwaway Filter

2 = 1” Throwaway MERV 8 Filter

3 = 1” Throwaway, 1 Extra

4 = 1” Throwaway MERV 8, 1 Extra

5 = 1” Throwaway, 2 Extras

6 = 1” Throwaway MERV 8, 2 Extras

7 = 1” Throwaway, 3 Extras

8 = 1” Throwaway MERV 8, 3 Extras

Digit 27 — Main Control Valve

0 = None

A = 2-Way, 2-Position, NO (30 psig)

B = 3-Way, 2-Position, NO (28 psig)

C = 2-Way, 2-Position, NC (30 psig)

D = 3-Way, 2-Position, NC (20 psig)

E = 2-Way, 2-Position, NO (50 psig)

F = 3-Way, 2-Position, NO (28 psig)

G = 2-Way, 2-Position, NC (50 psig)

H = 3-Way, 2-Position, NC (28 psig)

J = 2-Way, Modulating, 0.6 Cv

(60 psig)

K = 3-Way, Modulating, 0.6 Cv

(60 psig)

L = 2-Way, Modulating, 1.1 Cv

(60 psig)

M = 3-Way, Modulating, 1.1 Cv

(60 psig)

N = 2-Way, Modulating, 2.3 Cv

(60 psig)

P = 3-Way, Modulating, 2.7 Cv

(60 psig)

Q = 2-Way, Modulating, 3.3Cv

(60 psig)

R = 3-Way, Modulating, 3.8 Cv

(60 psig)

X = Field-supplied, NO

Y = Field-supplied, NC

Z = Field-supplied 3-Wire Modulating

Digit 28 — Auxiliary Control

Valve

0 = None

A = 2-Way, 2-Position, NO (30 psig)

B = 3-Way, 2-Position, NC (28 psig)

C = 2-Way, 2-Position, NC (30 psig)

D = 3-Way, 2-Position, NC (20 psig)

E = 2-Way, 2-Position, NO (50 psig)

F = 3-Way, 2-Position, NO (28 psig)

G = 2-Way, 2-Position, NC (50 psig)

H = 3-Way, 2-Position, NC (28 psig)

J = 2-Way, Modulating, 0.6 Cv

(60 psig)

K = 3-Way, Modulating, 0.6 Cv

(60 psig)

L = 2-Way, Modulating, 1.1 Cv

(60 psig)

M = 3-Way, Modulating, 1.1 Cv

(60 psig)

N = 2-Way, Modulating, 2.3 Cv

(60 psig)

P = 3-Way, Modulating, 2.7 Cv

(60 psig)

Q = 2-Way, Modulating, 3.3Cv

(60 psig)

R = 3-Way, Modulating, 3.8 Cv

(60 psig)

X = Field-supplied, NO

Y = Field-supplied, NC

Z = Field-supplied 3-Wire Modulating

Digit 29 — Piping Packages

0 = None

A = Basic Ball Valve Supply and

Return

B = Basic Ball Valve Supply/Manual

Circuit Setter

C = Basic Ball Valve Supply and

Return with Auto Circuit Setter

D = Deluxe Ball Valve Supply and

Return

E = Deluxe Ball Valve Supply/Manual

Circuit Setter

F = Deluxe Ball Valve Supply and

Return with Auto Circuit Setter

Digit 30 — Control Type

A = Fan Mode Switch

E = Tracer ZN010

F = Tracer ZN510

G = Tracer ZN520

H = Customer Supplied Thermostat

Interface (CSTI)

Digit 31 — Control Option

D = Unit-Mounted Fan Mode Switch

K = Wall-Mounted Fan Mode Switch

V = Unit-Mounted Fan Speed Switch w/Setpoint Dial Zone Sensor

W = Wall-Mounted Fan Speed Switch w/Setpoint Dial Zone Sensor

X = Unit-Mounted Fan Speed Switch w/Wall-Mounted Setpoint Dial

Zone Sensor

Y = Unit-Mounted Fan Speed Switch

& Wall-Mounted Setpoint Dial w/Comm.

Z = Unit-Mounted Fan Speed Switch,

On/Cancel, Setpoint Dial w/ Comm.

1 = Wall-Mounted On/Cancel w/ Comm.

2 = Wall-Mounted Fan Speed Switch,

Setpoint Dial, On/Cancel w/ Comm.

0 = Without Control Option

3 = Unit-Mounted Low Voltage Fan

Speed Switch (Off /Hi /Med /Low)

4 = Wall-Mounted Digital Zone

Sensor (OALMH, Setpoint,

On/Cancel, Comm Jack)

5 = Wall-Mounted Digital Zone

Sensor (On/Cancel, Comm Jack)

6 = Wireless Zone Sensor

7 = Wireless Display Sensor, Unit-

Mounted Receiver

Digit 32 - IAQ Options

0 = Without IAQ Options

1 = Dehumidification

4 = Dehumidification w/ Sensor

Digits 33, 34 —Future Control

Functions

Digit 35 — Control Function #3

0 = None

2 = Condensate Overflow Detection

8 UNT-SVX07B-EN

Digit 36 — Control Function #4

0 = None

2 = Low Temperature Detection

Digits 37, 38 — Future Control

Functions

Digit 39 — Projection Panels and

Falsebacks

0 = None

A = 5/8” Standard Recessed Panel

(Vertical Recessed Units Only)

B = 2” Projection Panel

C = 2.5” Projection Panel

D = 3” Projection Panel

E = 3.5” Projection Panel

F = 4” Projection Panel

G = 4.5” Projection Panel

H = 5” Projection Panel

J = 5.5” Projection Panel

K = 6” Projection Panel

L = 2”Falseback

M = 3” Falseback

N = 4” Falseback

P = 5” Falseback

Q = 6” Falseback

R = 7” Falseback

T = 8” Falseback

Digit 40 — Main Autoflow Gpm

0 = None

A = 0.5

B = 0.75

C = 1.0

D = 1.5

E = 2.0

F = 2.5

G = 3.0

H = 3.5

J = 4.0

K = 4.5

L = 5.0

M = 6.0

N = 7.0

P = 8.0

Digit 41 — Auxiliary Autoflow

Gpm

0 = None

A = 0.5

B = 0.75

C = 1.0

D = 1.5

E = 2.0

F = 2.5

G = 3.0

H = 3.5

J = 4.0

K = 4.5

L = 5.0

M = 6.0

N = 7.0

P = 8.0

Digit 42 — Subbases

0 = None

A = 2” Subbase

B = 3” Subbase

C = 4” Subbase

D = 5” Subbase

E = 6” Subbase

F = 7” Subbase

Digit 43 — Recessed Flange

0 = None

A = Recessed Flange

Digit 44 — Wall Boxes

0 = None

A = Anodized Wall Box

UNT-SVX07B-EN

Model Number Descriptions

9

General Information

UniTrane fan-coil and Force-Flo units are intended for single zone applications. These units have load capabilities of 200 to 1200 cfm. See Figure 1 for unit components. Fan-coil units are available as two-pipe, with or without electric heat (one hydronic circuit) or four-pipe (two hydronic circuits).

Force-Flo units feature two-pipe hydronic, electric heat only, or steam only. Also, these units feature a variety of factory mounted piping packages.

Units with the three-speed fan switch only, are available with the switch mounted on the unit, or shipped separately, to be mounted in the occupied space. The unit mounted three-speed switch option can be ordered with a low voltage (24 vols AC) transformer and three fan speed relays. The three-speed switch option, which ships separately, comes with a low voltage (24 volt AC) transformer and three fan speed relays.

The Tracer ZN010, ZN510, and ZN520 controllers are included inside the units control box assembly.

These controllers utilize analog signals from a unit-mounted control device or from a control device mounted in the occupied space.

The controls interface option, includes a 24 volt AC transformer, and an interface terminal board.

Controls provided by an external source can be tied into the interface terminal board utilizing 1/4” female spade connectors.

Figure 1.

UniTrane fan-coil unit components (vertical cabinet model is shown)

Factory installed and tested controls

Smaller unit footprint

Quiet operation

Two, three, or four-row coils

Factory assembled, installed and tested piping package with IAQ drain pan to collect condensate

Removable, noncorrosive, positively-sloped drain pan that’s easy to clean

Easy to remove fan assembly

16-gage steel construction

Easy filter access without front panel removal

Cleanable closedcell insulation (nonfiberglass)

Damper allows up to 100% fresh air

10 UNT-SVX07B-EN

Pre-Installation



WARNING

Hazardous Voltage w/Capacitors!

Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors. Verify with an appropriate voltmeter that all capacitors have discharged. Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury.

Receiving and Handling

Upon delivery, inspect all components for possible shipping damage. See “Receiving Checklist”

(below) for detailed instructions. Trane recommends leaving units and accessories in their shipping packages/skids for protection and ease of handling until installation.

Shipping Package

UniTrane fan-coil and Force-Flo cabinet heaters ship in individual cartons for handling and storage ease. Each carton has tagging information such as the model number, sales order number, serial number, unit size, piping connections, and unit style to help properly locate the unit in the floor plan. If specified, the unit will ship with tagging designated by the customer.

Receiving Checklist

Complete the following checklist immediately after receiving unit shipment to detect possible shipping damage.

†

Inspect individual cartons before accepting. Check for rattles, bent carton corners, or other visible indications of shipping damage.

†

If a unit appears damaged, inspect it immediately before accepting the shipment. Manually rotate the fan wheel to ensure it turns freely. Make specific notations concerning the damage on the freight bill. Do not refuse delivery.

†

Inspect the unit for concealed damage before it is stored and as soon as possible after delivery.

Report concealed damage to the freight line within the allotted time after delivery. Check with the carrier for their allotted time to submit a claim.

†

Do not move damaged material from the receiving location. It is the receiver’s responsibility to provide reasonable evidence that concealed damage did not occur after delivery.

†

Do not continue unpacking the shipment if it appears damaged. Retain all internal packing, cartons, and crate. Take photos of damaged material.

†

Notify the carrier’s terminal of the damage immediately by phone and mail. Request an immediate joint inspection of the damage by the carrier and consignee.

†

Notify your Trane representative of the damage and arrange for repair. Have the carrier inspect the damage before making any repairs to the unit.

†

Compare the electrical data on the unit nameplate with the ordering and shipping information to verify the correct unit is received.

Jobsite Storage

This unit is intended for indoor use only. Store the unit indoors to protect the unit from damage due to the elements. If indoor storage is not possible, make the following provisions for outdoor storage:

1.

Place the unit(s) on a dry surface or raised off the ground to assure adequate air circulation beneath unit and to assure that no portion of the unit contacts standing water at any time.

UNT-SVX07B-EN 11

Pre-Installation

2.

Cover the entire unit with a canvas tarp

only.

Do not

use clear, black or plastic tarps as they may cause excessive moisture condensation and equipment damage.

Installation Preparation

Before installing the unit, consider the following unit location recommendations to ensure proper unit operation.

1.

Clearances: Allow adequate service and code clearances as recommended in “Service Access”

(the next section). Position the unit and skid assembly in its final location.

2. Structural support: Ensure the structural support is strong enough to adequately support the unit. The installer is responsible for supply support rods for installation of ceiling units.

3. Level: Verify the floor or foundation is level. Shim or repair as necessary. To ensure proper unit operation, install the unit level (zero tolerance) in both horizontal axes. Failure to level the unit properly can result in condensate management problems, such as standing water inside the unit.

4. Condensate line & piping: Consider coil piping and condensate drain requirements. Verify condensate line is continuously pitched 1 inch per 10 feet of condensate line run to adequately drain condensate.

5. Wall & ceiling openings: Vertical recessed/concealed units require wall/ceiling openings. Refer to submittal for specific dimensions before attempting to install. Horizontal recessed/concealed units must meet the requirements of the National Fire Protection Association (NFPA) Standard

90A or 90B concerning the use of concealed ceiling spaces as return air plenums. Refer to the submittal for specific dimensions of ceiling openings.

6. Exterior: Touch up painted panels if necessary. If panels need paint, sanding is not necessary.

However, clean the surface of any oil, grease, or dirt residue so the paint will adhere. Purchase factory approved touch up epoxy paint from your local Trane Service Parts Center and apply.

Service Access

Service access is available from the front on vertical units and from the bottom on horizontal units.

Cabinet and recessed units have removable front or bottom panels to allow access into the unit.

See Figure 2, p. 13 for recommended service and operating clearances.

12 UNT-SVX07B-EN

Pre-Installation

Figure 2.

Recommended service clearances

24"

12" both sides

8.5" both sides model B, vertical cabinet model L, low vertical cabinet

3" model A, vertical concealed model K, low vertical concealed model H, vertical recessed

12" both sides

24" front discharge

8.5" both sides

36"

28"

28" model D, horizontal cabinet model C, horizontal concealed model E, horizontal recessed

Units have either right or left hand piping. Reference piping locations by facing the front of the unit

(airflow discharges from the front). The control panel is always on the end opposite the piping.

The fan board assembly and main drain pan are easily removable for cleaning. See “Maintenance,” p. 101 for more details on servicing.

Pre-Installation Checklist

Complete the following checklist before beginning unit installation.

†

Verify the unit size and tagging with the unit nameplate.

†

Make certain the floor or foundation is level, solid, and sufficient to support the unit and accessory weights. See “Dimensions and Weights,” p. 14 . Level or repair the floor before positioning the unit if necessary.

†

Allow minimum recommended clearances for routine maintenance and service. Refer to unit submittals for dimensions.

†

Allow one and one half fan diameters above the unit before the discharge ductwork makes any turns.

UNT-SVX07B-EN 13

Dimensions and Weights

Table 1.

Fan-coil component data

Unit Size

Coil Data

Face Area — ft

2

(cm

2

)

LxDxH — in. (cm)

02

0.8 (743)

03

0.8 (743)

04

1.1 (1020)

06

1.6 (1490)

08

2.1 (1950)

10

3.2 (2970)

12

3.2 (2970)

2-Row

3-Row

4-Row

15 x 1.7 x 8 15 x 1.7 x 8 20 x 1.7 x 8 29.5 x 1.7 x 8 38 x 1.7 x 8 57 x 1.7 x 8 57 x 1.7 x 8

(38 x 4 x 20) (38 x 4 x 20) (51 x 4 x 20) (75 x 4 x 20) (97 x 4 x 20) (145 x 4 x 20) (145 x 4 x 20)

15 x 2.6 x 8 15 x 2.6 x 8 20 x 2.6 x 8 29.5 x 2.6 x 8 38 x 2.6 x 8 57 x 2.6 x 8 57 x 2.6 x 8

(38 x 7 x 20) (38 x 7 x 20) (51 x 7 x 20) (75 x 7 x 20) (97 x 7 x 20) (145 x 7 x 20) (145 x 7 x 20)

15 x 3.5 x 8 15 x 3.5 x 8 20 x 3.5 x 8 29.5 x 3.5 x 8 38 x 3.5 x 8 57 x 3.5 x 8 57 x 3.5 x 8

(38 x 9 x 20) (38 x 9 x 20) (51 x 9 x 20) (75 x 9 x 20) (97 x 9 x 20) (145 x 9 x 20) (145 x 9 x 20)

Volume — gal (L)

1-Row (Heat)

2-Row

3-Row

0.06 (0.23)

0.12 (0.45)

0.18 (0.68)

0.24 (0.91)

0.06 (0.23)

0.12 (0.45)

0.18 (0.68)

0.24 (0.91)

0.08 (0.30)

0.15 (0.57)

0.23 (0.87)

0.30 (1.14)

0.11 (0.42)

0.22 (0.83)

0.33 (1.25)

0.44 (1.67)

0.14 (0.53)

0.28 (1.06)

0.42 (1.59)

0.56 (2.12)

0.21 (0.79)

0.42 (1.59)

0.62 (2.35)

0.83 (3.14)

0.21 (0.79)

0.42 (1.59)

0.62 (2.35)

0.83 (3.14) 4-Row

Fins/ft (cm)

2-Row

3-Row

144 (4.7)

144 (4.7)

144 (4.7)

144 (4.7)

4-Row 144 (4.7) 144 (4.7)

Reheat Coil Data (1-Row), Standard or High-Capacity

(a)

Hot Water or Steam

Face Area — ft

2

(cm

2

) 0.6

0.6

L x D x H — in. (cm)

(557)

15 x 1.5 x 6

(557)

15 x 1.5 x 6

144 (4.7)

144 (4.7)

144 (4.7)

0.8

(743)

20 x 1.5 x 6

144 (4.7)

144 (4.7)

144 (4.7)

1.2

(1120)

144 (4.7)

144 (4.7)

144 (4.7)

1.6

(1490)

29.5 x 1.5 x 6 38 x 1.5 x 6

144 (4.7)

144 (4.7)

144 (4.7)

2.4

(2230)

57 x 1.5 x 6

144 (4.7)

144 (4.7)

144 (4.7)

2.4

(2230)

57 x 1.5 x 6

Volume — gal (L)

(38 x 4 x 15) (38 x 4 x 15) (51 x 4 x 15) (75 x 4 x 15) (97 x 4 x 15) (145 x 4 x 15) (145 x 4 x 15)

0.12 (0.45)

Standard Capacity

(a)

Fins/ft (cm) 48 (1.6)

High-Capacity

(a)

Fins/ft (cm) 144 (4.7)

0.12 (0.45)

48 (1.6)

144 (4.7)

0.15 (0.57)

48 (1.6)

144 (4.7)

0.22 (0.83)

48 (1.6)

144 (4.7)

0.28 (1.06)

48 (1.6)

144 (4.7)

0.42 (1.59)

48 (1.6)

144 (4.7)

0.42 (1.59)

48 (1.6)

144 (4.7)

Fan/Motor Data

Fan Quantity

Size — Dia” x Width” (cm)

Size — Dia” x Width” (cm)

1

6.31 x 4

(16 x 10)

1

6.31 x 6.5

(16 x 17)

1

6.31 x 7.5

(16 x 19)

2

6.31 x 6.5

(16 x 17)

2

6.31 x 7.5

(16 x 19)

3 3

(1) 6.31 x 7.5 6.31 x 7.5

(16 x 19) (16 x 19)

(2) 6.31 x 6.5

(16 x 6.5)

2 2 Motor Quantity

Filter Data

1” (cm) TA and Pl. Media

Quantity

Size — in. (cm)

1 1 1 1 1

1 1 1 1 1 1 1

8-7/8 x 19-1/8 8-7/8 x 19-1/8 8-7/8 x 24-1/8 8-7/8 x 33-5/8 8-7/8 x 42-1/8 8-7/8 x 61-1/8 8-7/8 x 61-1/8

(23 x 49) (23 x 49) (23 x 61) (23 x 85) (23 x 107) (23 x 155) (23 x 155)

1” Fresh Air Filter (only on cabinet styles D, E, and H with bottom return and fresh air opening)

Quantity 1 1 1 1 1

Size — in. (cm)

1 1

5-1/2 x 19-1/8 5-1/2 x 19-1/8 5-1/2 x 24-1/8 5-1/2 x 33-5/8 5-/2 x 42-1/8 5-1/2 x 61-1/8 5-1/2 x 61-1/8

(14 x 49) (14 x 49) (14 x 61) (14 x 85) (14 x 107) (14 x 156) (14 x 156)

(a) Standard and high-capacity reheat coils share the same component data except that standard capacity reheat coils have 48 fins/ft (1.6 fins/cm) while high-capacity reheat coils have 144 fins/ft (4.7 fins/cm).

14 UNT-SVX07B-EN

UNT-SVX07B-EN

Dimensions and Weights

Table 2.

Low vertical fan-coil component data

Unit Size 03 04 06

Coil Data

Face Area — ft

2

(cm

2

)

L x D x H — in. (cm)

2-Row

3-Row

Volume — gal (L)

1-Row (Heat)

2-Row

1.1 (1020)

20 x 1.7 x 8 (51 x 4 x 20)

20 x 2.6 x 8 (51 x 7 x 20)

0.08 (0.30)

0.15 (0.57)

0.23 (0.87) 3-Row

Fins/ft

2-Row

3-Row

144 (4.7)

144 (4.7)

Fan/Motor Data

Fan Quantity 1

Size — Dia”x Width” (cm) 5 x 23 (13 x 59)

Motor Quantity 1

1.6 (1490)

29.5 x 1.7 x 8 (75 x 4 x 20) 38 x 1.7 x 8 (97 x 4 x 20)

29.5 x 2.6 x 8 (75 x 7 x 20) 38 x 2.6 x 8 (97 x 7 x 20)

0.11 (0.42)

0.22 (0.83)

0.33 (1.25)

144 (4.7)

144 (4.7)

1

5 x 32 (13 x 83)

1

2.1 (1950)

0.14 (0.53)

0.28 (1.06)

0.42 (1.59)

144 (4.7)

144 (4.7)

1

5 x 41 (13 x 105)

1

Filter Data

1” (2.5 cm) TA

Quantity

Size — in. (cm)

1

8-7/8 x 24-1/8 (23 x 61)

1

8-7/8 x 33-5/8 (23 x 85)

1

8-7/8 x 42-1/8 (23 x 107)

15

Dimensions and Weights

Available Models

Model A: Vertical Concealed Model B: Vertical Short Model C: Horizontal Concealed

Model D: Horizontal Cabinet Model E: Horizontal Recessed Model F: Wall Hung Cabinet

(Force-Flo units only)

Model L: Low Vertical Concealed Model K: Low Vertical Cabinet Model H: Vertical Recessed

Model J: Slope-Top Cabinet

16

Model M: Inverted Vertical Cabinet

(Force-Flo units only)

Model N: Inverted Vertical Recessed

(Force-Flo units only)

UNT-SVX07B-EN

Factory-Installed Piping Packages

Dimensions and Weights

Auto Circuit Setter (C)

UNT-SVX07B-EN

Note:

This figure shows piping package components and basic arrangement. It is not an accurate picturial of what factory-installed piping packages look like.

17

Dimensions and Weights

Vertical Concealed, Model A

18

Vertical Concealed Unit Dimensions (in.) and Weights (lb)

Unit Size 02–03 04 06 08 10–12

A

B

C

D

E

Operating

Weight

Shipping

Weight

32-11/16”

21-5/16”

22-13/16”

17-5/16”

19-5/16”

81

68

37-11/16”

26-5/16”

27-13/16”

22-5/16”

24-5/16”

109

96

47-3/16”

35-13/16”

37-5/16”

31-13/16”

33-13/16”

139

123

55-11/16”

44-5/16”

45-13/16”

40-5/16”

42-5/16”

147

131

74-11/16”

63-5/16”

64-13/16”

59-5/16”

61-5/16”

200

182

Notes:

1. Coil connections are always on the drain pan side and opposite the control box.

2. Coil connections are 5/8” O.D. sweat. See p. 30 and p. 31 for locations.

3. All duct collar dimensions are to the outside of the collar.

4. See p. 34 for dimensions for outside air openings.

5. Serviceability for some components within this unit may require panel or drain pan removal.

UNT-SVX07B-EN

Vertical Cabinet, Model B

Dimensions and Weights

UNT-SVX07B-EN

Vertical Cabinet Unit Dimensions (in.) and Weights (lb)

Unit Size 02–03 04 06 08 10–12

A

B

C

D

E

F

Operating

Weight

Shipping

Weight

33-5/16”

21-5/16”

7-5/8”

18”

19-5/16”

41-5/16”

97

84

38-5/16”

26-5/16”

7-1/8”

24”

24-5/16”

46-5/16”

125

112

47-13/16”

35-13/16”

8-7/8”

30”

33-13/16”

55-3/16”

155

139

56-5/16”

44-5/16”

7-1/8”

42”

42-5/16”

64-5/16”

164

148

75-5/16”

63-5/16”

7-5/8”

60”

61-5/16”

83-5/16”

218

200

Notes:

1. Coil connections are always on the drain pan side and opposite the control box and unit control.

2. Coil connections are 5/8” O.D. sweat. See p. 30 and p. 31 for locations.

3. All duct collar dimensions are to the outside of the collar.

4. See p. 34 for dimensions for outside air openings.

5. Serviceability for some components within this unit may require panel or drain pan removal.

19

Dimensions and Weights

Horizontal Concealed, Model C

20

Horizontal Concealed Unit Dimensions (in.) and Weights (lb)

Unit Size 02–03 04 06 08 10–12

A

B

C

D

E

F

Operating

Weight

Shipping

Weight

32-11/16”

21-5/16”

22-13/16”

19-3/8”

18-1/8”

19-5/16”

81

68

37-11/16”

26-5/16”

27-13/16”

24-3/8”

23-1/8”

24-5/16”

109

96

47-3/16”

35-13/16”

37-5/16”

33-7/8”

32-5/8”

33-13/16”

139

123

55-11/16”

44-5/16”

45-13/16”

42-3/8”

41-1/8”

43-5/16”

147

131

74-11/16”

63-5/16”

64-13/16”

61-3/8”

60-1/8”

61-5/16”

200

182

Notes:

1. Coil connections are always on the drain pan side and opposite the control box.

2. Coil connections are 5/8” O.D. sweat. See p. 30 and p. 31 for locations.

3. All duct collar dimensions are to the outside of the collar.

4. See p. 33 for dimensions for outside air openings.

5. Serviceability for some components within this unit may require panel or drain pan removal.

UNT-SVX07B-EN

Horizontal Cabinet, Model D

Dimensions and Weights

UNT-SVX07B-EN

Horizontal Cabinet Unit Dimensions (in.) and Weights (lb)

Unit Size

A

02–03

33-5/16”

04

38-5/16”

06

47-3/16”

08

56-5/16”

10–12

75-5/16”

D

E

F

B

C

G

H

J

Operating

Weight

Shipping

Weight

21-5/16”

7-5/8”

18”

17-1/4”

41-5/16”

8-5/8”

16”

19-3/4”

97

84

26-5/16”

7-1/8”

24”

22-1/4”

46-5/16”

8-1/8”

22”

23-3/4”

125

112

35-13/16”

8-7/8”

30”

31-3/4”

55-3/16”

9-7/8”

28”

31-3/4”

155

139

44-5/16”

7-1/8”

42”

40-1/4”

64-5/16”

8-1/8”

40”

39-3/4”

164

148

63-5/16”

7-5/8”

60”

59-1/4”

83-5/16”

8-5/8”

58”

59-3/4”

218

200

Notes:

1. Coil connections are always on the drain pan side and opposite the control box.

2. Coil connections are 5/8” O.D. sweat. See p. 30 and p. 31 for locations.

3. All duct collar dimensions are to the outside of the collar.

4. See p. 33 for dimensions for outside air openings.

5. Serviceability for some components within this unit may require panel or drain pan removal.

21

Dimensions and Weights

Horizontal Recessed, Model E

22

Horizontal Recessed Unit Dimensions

Unit Size 02–03 04 06

C

D

A

B

E

F

G

H

Operating

Weight

Shipping

Weight

35-13/16”

21-5/16”

40-13/16”

262-5/16”

22-13/16” 273-13/16”

19-3/8” 24-3/8”

18-1/8”

32-7/16”

23-1/8”

37-7/16”

34-5/16”

19-3/4”

39-5/16”

23-3/4”

78

68

88

78

50-5/16”

35-13/16”

37-5/16”

33-7/8”

32-5/8”

46-15/16”

48-13/16”

31-3/4”

128

118

08

48-13/16”

44-5/16”

45-13/16”

42-3/8”

41-1/8”

55-7/16”

57-5/16”

39-3/4”

139

129

253

243

Notes:

1. Coil connections are always on the drain pan side.

2. Coil connections are 5/8” O.D. sweat. See p. 30 and p. 31 for locations.

3. All duct collar dimensions are to the outside of the collar.

4. See p. 33 for dimensions for outside air openings.

5. Serviceability for some components within this unit may require panel or drain pan removal.

6. Side View, Inlet option view gives dimensions for the telescoping panel.

10–12

77-13/16”

63-5/16”

64-13/16”

61-3/8”

60-1/8”

74-7/16”

76-5/16”

59-3/4”

UNT-SVX07B-EN

Vertical Wall Hung Cabinet, Model F (Force-Flo Units Only)

Dimensions and Weights

UNT-SVX07B-EN

Vertical Wall Hung Cabinet Unit Dimensions (in.) and Weights

(lb)

Unit Size 02–03 04 06 08 10–12

A

B

C

D

E

F

Operating

Weight

Shipping

Weight

33-5/16”

21-5/16”

7-5/8”

18”

19-5/16”

19-3/4”

97

84

38-5/16”

26-5/16”

7-1/8”

24”

24-5/16”

23-3/4”

125

112

47-13/16”

35-13/16”

8-7/8”

30”

33-13/16”

31-3/4”

155

139

56-5/16”

44-5/16”

7-1/8”

42”

42-5/16”

39-3/4”

164

148

75-5/16”

63-5/16”

7-5/8”

60”

61-5/16”

59-3/4”

218

200

Notes:

1. Coil connections are always opposite the control box side.

2. Coil connections are 5/8” O.D. sweat. See p. 30 and p. 31 for locations.

3. All duct collar dimensions are to the outside of the collar.

4. See p. 34 for dimensions for outside air openings.

23

Dimensions and Weights

Vertical Recessed, Model H

Vertical Recessed Unit Dimensions (in.) and Weights (lb)

Unit Size 02–03 04 06 08 10–12

E

F

G

H

A

B

C

D

J

Operating

Weight

Shipping

Weight

32-11/16”

21-5/16”

22-13/16”

17-5/16”

47”

30”

2-3/8”

42”

26-1/2”

78

68

37-11/16”

26-5/16”

27-13/16”

22-5/16”

51”

30”

2-3/8”

48”

26-1/2”

88

78

47-3/16”

35-13/16”

37-5/16”

31-13/16”

63”

30”

2-3/8”

57”

26-1/2”

128

118

55-11/16”

44-5/16”

45-13/16”

40-5/16”

65-1/2”

33-1/2”

4-1/8”

63”

27-1/2”

139

129

74-11/16”

63-5/16”

64-13/16”

59-5/16”

89-1/2”

33-1/2”

4-1/8”

87”

27-1/2”

253

243

Notes:

1. Coil connections are always on the drain pan side and opposite the control box.

2. Coil connections are 5/8” O.D. sweat. See p. 30 and p. 31 for locations.

3. All duct collar dimensions are to the outside of the collar.

4. See p. 34 for dimensions for outside air openings.

5. Serviceability for some components within this unit may require panel or drain pan removal.

24 UNT-SVX07B-EN

Vertical Slope Top, Model J

Dimensions and Weights

UNT-SVX07B-EN

Vertical Slope Top Unit Dimensions (in.) and Weights (lb)

Unit Size 02–03 04 06 08 10–12

C

D

A

B

E

F

Operating

Weight

Shipping

Weight

33-5/16”

21-5/16”

7-5/8”

18”

19-5/16”

41-5/16”

97

84

38-5/16”

26-5/16”

7-1/8”

24”

24-5/16”

46-5/16”

125

112

47-13/16”

35-13/16”

8-7/8”

30”

33-13/16”

55-13/16”

155

139

56-5/16”

44-5/16”

7-1/8”

42”

42-5/16”

64-5/16”

164

148

75-5/16”

63-5/16”

7-5/8”

60”

61-5/16”

83-5/16”

218

200

Notes:

1. Coil connections are always on the drain pan side and opposite the control box and unit control.

2. Coil connections are 5/8” O.D. sweat. See p. 30 and p. 31 for locations.

3. All duct collar dimensions are to the outside of the collar.

4. See p. 34 for dimensions for outside air openings.

5. Serviceability for some components within this unit may require panel or drain pan removal.

25

Dimensions and Weights

Low Vertical Concealed, Model K

12-1/2 "

12-1/4 "

2-3/8 "

2-9/16 "

3-3/8 "

9-5/16 "

1-1/16

"

12-9/16"

2-11/16"

10-11/16"

1-1/8

"

1-13/16"

1-1/16

"

1-13/16

"

3-9/16

"

7-1/4 "

13-1/4

"

6-1/4

"

Low Vertical Concealed Unit Dimensions

(in.) and Weights (lb)

Unit Size 03 04 06

A

B

C

D

E

Operating

Weight

Shipping

Weight

41-7/16”

26-1/4”

27-15/16”

22-5/16”

24-1/4”

109

96

50-15/16”

35-3/4”

36-13/16”

31-13/16”

339-3/4”

139

123

59-7/16”

44-1/4”

45-15/16”

40-5/16”

42-1/4”

147

131

Notes:

1. Coil connections are always on the drain pan side and opposite the control box.

2. Coil connections are 5/8” O.D. sweat.

3. All duct collar dimensions are to the outside of the collar.

4. See p. 34 for dimensions for outside air openings.

5. Serviceability for some components within this unit may require panel or drain pan removal.

14-1/2

"

3-1/4

"

6-7/16 "

14-1/4 "

1-15/16

"

13-1/2 "

1-5/16

"

14 "

26 UNT-SVX07B-EN

Dimensions and Weights

Low Vertical Cabinet, Model L

10-15/16"

4-7/16"

8-1/2"

1-13/16"

10-15/16"

12-1/2"

12-1/4"

3-1/16"

2-3/8"

3-7/8"

7-1/2"

9 -13/16"

1-13/16"

13-3/16"

2-11/16"

3-1/4"

6-7/16"

11-5/16" 11-5/16"

1-5/16"

14-1/2"

1-1/8"

1-15/16"

13-1/2"

Low Vertical Cabinet Unit Dimensions (in.) and Weights (lb)

Unit Size

A

03

46-15/16”

04

56-7/16”

06

64-15/16”

B

C

D

E

Operating

Weight

Shipping

Weight

26-1/4”

11-7/16”

24”

24-1/4”

125

112

35-3/4”

13-5/16”

30”

33-3/4”

155

139

44-1/4”

11-7/16”

42”

42-1/4”

164

148

Notes:

1. Coil connections are always on the drain pan side and opposite the control box.

2. Coil connections are 5/8” O.D. sweat.

3. All duct collar dimensions are to the outside of the collar.

4. See p. 34 for dimensions for outside air openings.

5. Serviceability for some components within this unit may require panel or drain pan removal.

UNT-SVX07B-EN 27

Dimensions and Weights

Inverted Vertical Cabinet, Model M (Force-Flo Units Only)

28

Inverted Vertical Cabinet Unit Dimensions (in.) and Weights (lb)

Unit Size 02–03 04 06 08 10–12

C

D

A

B

E

F

Operating

Weight

Shipping

Weight

33-5/16”

21-5/16”

7-5/8”

18”

19-5/16”

19-3/4”

97

84

38-5/16”

26-5/16”

7-1/8”

24”

24-5/16”

23-3/4”

125

112

47-13/16”

35-13/16”

8-7/8”

30”

33-13/16”

31-3/4”

155

139

56-5/16”

44-5/16”

7-1/8”

42”

42-5/16”

39-3/4”

164

148

75-5/16”

63-5/16”

7-5/8”

60”

61-5/16”

59-3/4”

218

200

Notes:

1. Coil connections are always opposite the control box side.

2. Coil connections are 5/8” O.D. sweat. See p. 31 for locations.

3. All duct collar dimensions are to the outside of the collar.

4. See p. 34 for dimensions for outside air openings.

UNT-SVX07B-EN

Dimensions and Weights

Inverted Vertical Recessed, Model N (Force-Flo Units Only)

Inverted Vertical Recessed Unit Dimensions (in.) and Weights

(lb)

Unit Size 02–03 04 06 08 10–12

C

D

E

A

B

F

G

H

Operating

Weight

Shipping

Weight

27-7/8”

21-5/16”

22-13/16”

2-3/8”

47”

30”

26-1/2”

42”

78

68

32-7/8”

26-5/16”

27-13/16”

2-3/8”

51”

30”

26-1/2”

48”

88

78

42-3/8”

35-13/16”

37-5/16”

2-3/8”

63”

30”

26-1/2”

57”

128

118

50-7/8”

44-5/16”

45-13/16”

4-1/8”

65-1/2”

33-1/2”

27-1/2”

63”

139

129

69-7/8”

63-5/16”

64-13/16”

4-1/8”

89-1/2”

33-1/2”

27-1/2”

87”

253

243

Notes:

1. Coil connections are always opposite the control box side.

2. Coil connections are 5/8” O.D. sweat. See p. 31 for locations.

3. All duct collar dimensions are to the outside of the collar.

4. See p. 34 for dimensions for outside air openings.

UNT-SVX07B-EN 29

Dimensions and Weights

Fan-Coil Coil Connections, Vertical Units

Fan-Coil Coil Connections, Horizontal Units

30 UNT-SVX07B-EN

Force-Flo Coil Connections, Vertical Units

Dimensions and Weights

Force-Flo Coil Connections, Horizontal Units

UNT-SVX07B-EN 31

Dimensions and Weights

Force-Flo Coil Connections, Inverted Units

32 UNT-SVX07B-EN

Dimensions and Weights

Fresh Air Opening Locations, Horizontal Units—Models C, D, and E

Fresh air opening dimensions, horizontal units

Unit Size

A

B

02–03

1’ 6”

04

1’ 11”

06

2’ 8-1/2”

08

3’ 5”

10–12

5’ 0”

1’ 9-5/16” 2’ 2-5/16” 2’ 11-13/16” 3’ 8-5/16” 5’ 3-5/16”

UNT-SVX07B-EN 33

Dimensions and Weights

Fresh Air Opening Locations, Vertical Units—Models A, B, F, H, J, K, L, M, and N

Fresh air opening dimensions, vertical units

Unit Size

A

B

02–03

1’ 6”

04

1’ 11”

06

2’ 8-1/2”

08

3’ 5”

10–12

5’ 0”

1’ 9-5/16” 2’ 2-5/16” 2’ 11-13/16” 3’ 8-5/16” 5’ 3-5/16”

34 UNT-SVX07B-EN

Dimensions and Weights

Wall Box

1/8”

Continuous

Mortar Ribs

Top and

Bottom

1/8”

1/2”

3/4”

1/2”

4”

Clearance for

Drainage

1-3/8”

1/8”

Woven Aluminum

Insect Screen

Wall box dimensions

Unit Size, Ref. only Dimensions A x B Internal Supports

02–03 24-3/8 x 4- 3/4 1

04

06

24-3/8 x 7-1/2

33-1/8 x 7-1/2

1

2

08

10–12

37-1/2 x 7-1/2

58-1/4 x 7-1/2

3

4

Continuous Drip Lip

Top and Bottom

Additional Internal

Supports Equally Spaced

Not to Exceed 12” O.C.

5/8”

UNT-SVX07B-EN 35

Dimensions and Weights

Projection Panel

Unit to Wall—Top View

Front View ISO

Rear View ISO

Projection panel dimensions

Unit Size

A

B

02–03

3’ 11”

2’ 6”

04

4’ 3”

2’ 6”

Projection panel, all unit sizes

C

D

E

2”

1-1/8”

8-5/8”

2-1/2”

1-5/8”

8-1/8”

06

5’ 3”

2’ 6”

3”

2-1/8”

7-5/8”

08

5’ 5-1/2”

2’ 9-1/2”

10–12

7’ 5-1/2”

2’ 9-1/2”

3-1/2”

2-5/8”

7-1/8”

4”

3-1/8”

6-5/8”

4-1/2”

3-5/8”

6-1/8”

5”

4-1/8”

5-5/8”

5-1/2”

4-5/8”

5-1/8”

6”

5-1/8”

4-5/8”

2”

1-1/8”

8-5/8”

36 UNT-SVX07B-EN

Installation—Mechanical

Duct Connections

Install all air ducts according to National Fire Protection Association standards for the Installation of Air Conditioning and Ventilating Systems (NFPA 90A and 90B).

Install all air ducts according to the National Fire Protection Association standards for the

“Installation of Air Conditioning and Ventilation Systems other than Residence Type (NFPA 90A) and Residence Type Warm Air Heating and Air Conditioning Systems (NFPA 90B).



WARNING

Hazardous Voltage w/Capacitors!

Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors. Verify with an appropriate voltmeter that all capacitors have discharged. Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury.

The unit’s airflow configuration varies dependent on the model and options ordered. A one-inch duct collar is provided on units with a ducted return and/or discharge to attach ductwork to the unit.

Trane recommends using galvanized sheet metal ductwork with fan-coil and cabinet heater units.

Slide the sheetmetal duct over the duct collar flange of the unit, seal the joint and fasten with sheetmetal screws.

Note:

Do not run screws through the removable front panel on concealed units.

Ductwork Recommendations

Follow the general recommendations listed below when installing ductwork for the unit.

1.

Discharge ductwork should run in a straight line, unchanged in size or direction, for a minimum equivalent distance of three fan diameters from the unit (approximately 20 inches).

2. When making duct turns and transitions avoid sharp turns and use proportional splits, turning vanes, and air scoops when necessary.

3. When possible, construct, and orient supply ductwork turns in the same direction as the fan rotation.

Piping Considerations

Hydronic Coil Piping

Before installing field piping to the coil, consider the following .

• All coil connections are 5/8-inch O.D. (or 1/2-inch nominal) female copper connections.

• The supply and return piping should not interfere with the auxiliary drain pan or condensate line. See “Connecting the Condensate Drain” section for more detailed information.

• The installer must provide adequate piping system filtration and water treatment.

• Exterior condensate may be an issue (fan-coils only) if field piping does not have a control valve. Refer to the supply and return header locations in the “Dimensions and Weights” section.

Note:

When using a field supplied piping package in a fan-coil unit, allow sufficient room to install the auxiliary drain pan. In addition, piping package must not extend over edges of auxiliary drain pan.

Connecting Field Piping to Coil

1.

Remove the auxiliary drain pan, if it is in place, to prevent exposureto dripping solder or excessive temperatures.

UNT-SVX07B-EN 37

Installation—Mechanical

2. Slide a 1/2-inch sweat connection coupling (installer provided) onto the coil headers.

Note:

For vertical fan-coil units, push the main condensate drain hose and overflow condensate drain hose through the inside of the chassis end panel to prevent them from getting burned when making sweat connections. Be sure to pull the hoses back through and route to the auxiliary drain pan when the end panel has cooled.

3. Solder the joint using bridgit lead-free solder (ASTM B32-89) to provide a watertight connection. Avoid overheating factory soldered joints when soldering field connections to the coil to prevent leakage from occurring.

4. Insulate all piping to coil connections as necessary after connections are complete.

Note:

Maintain a minimum distance of one foot between the reduction fitting for the

1

/

2

-inch diameter line and the fan-coil unit piping connections.

5. Install the optional auxiliary drain pan, which ships in the accessory packet.

Water Piping Connections to Factory-Installed Piping Package

Before installing water piping supply and return lines to factory piping package, note the following items.

• All piping connections are 5/8-inch O.D. (1/2-inch nominal) female copper connections.

• The fan-coil supply and return piping should not interfere with the auxiliary drain pan or condensate line. See “Condensate Drain,” p. 38 for more information.

• The installer must provide adequate piping system filtration and water treatment.

• If the unit has a factory deluxe piping package, the piping includes a strainer with a 20-mesh size screen, which allows minimal protection from debris. Therefore, clean the strainer regularly.

Note:

Maintain a minimum distance of one foot between the reduction fitting for the

1

/

2

-inch diameter line and the fan-coil piping connections.

1.

The factory piping package ships with brackets to adequately support the piping during shipment. Remove these brackets before connecting water piping to the unit.

2. Close the piping end valves to the fully open position to prevent damage to the valve seat during brazing.

3. Remove the auxiliary drain pan, if it is in place, to prevent exposure to dripping solder or excessive temperatures.

4. Solder water piping connections to supply and return end connections. Avoid overheating factory soldered joints to prevent the possibility of leakage.

5. Insulate fan-coil piping to auxiliary drain pan connections and any piping that is not above the auxiliary drain pan.

Condensate Drain

1.

De-burr the pipe end before making the connection to the drain pan.

2. Connect a 7/8-inch O.D. copper pipe or tube, with a 0.20 inch wall thickness, to the auxiliary drain pan. This should be a mechanical connection that allows easy removal of the auxiliary drain pan when servicing the piping end pocket.

3. Slide the copper pipe over the drain pan nipple and tighten the collar on the pipe with a hose clamp (installer supplied).

Maintain a continuous drain line pitch of one inch per ten feet of drain line run to provide adequate condensate drainage. Extend the drain line straight from the drain pan a minimum distance of six inches before making any turns. The installer must provide proper support for the drain line to prevent undue stress on the auxiliary drain pan.

38 UNT-SVX07B-EN

Installation—Mechanical

Install a secondary overflow drain line if necessary by punching out the overflow drain nipple on the auxiliary drain pan. Next, place a

3

/

8

-inch inside diameter flexible plastic tube over the nipple and secure with a field supplied hose clamp.

Note:

The installer is responsible for adequately insulating field piping. See the “External

Insulating Requirements section for more information.

Condensate Overflow Detection Device

The condensate overflow detection device is an option on fan-coil units with either a Tracer ZN010,

ZN510, ZN520, or the customer-supplied control interface. The float switch, mounting bracket, and coiled leads ship attached inside the piping end pocket of the unit. Install the switch by placing the hole or slot in the bracket over the condensate overflow drain (of the auxiliary drain pan) with the switch float extending over the pan. Secure the drain pan by attaching the pan’s bracket with the factory provided clip. See Figure 3 and Figure 4 .

Figure 3.

Condensate float switch installed in horizontal auxiliary drain pan

Figure 4.

Condensate float switch installed in vertical auxiliary drain pan

UNT-SVX07B-EN

Automatic Changeover Sensor

Two-pipe changeover units with either the Tracer ZN010, ZN510, and ZN520 controls have an automatic changeover sensor that determines heating or cooling mode based on the supply water temperature. On units with a factory piping package, the factory straps the changeover sensor to the piping supply water pipe. See Figure 5, p. 40 and Figure 6, p. 40 .

39

Installation—Mechanical

Figure 5.

Attach the changeover sensor to the entering water pipe as shown for changeover to work properly

Figure 6.

Close-up view of the changeover sensor

40

If the unit does not have a factory piping package, the factory attaches the sensor and coiled lead wires to the piping side end panel. The installer should attach the sensor parallel to and in direct contact with the supply water pipe.

Note:

The installer is responsible to ensure the changeover sensor is installed in a location that can sense active water temperature. Otherwise, the unit may fail to sense the correct operating mode and disable temperature control.

When using field supplied three-way valves, install the changeover sensor upstream of the valve on the supply water pipe. When using field supplied two-way control valves, install the changeover sensor in a location that will detect active water temperature.

The unit must always be able to sense the correct system water temperature, regardless of the control valve position.

Note:

The maximum length of the automatic changeover wire cannot exceed ten feet from the control panel. If the sensor extends beyond the unit chassis, use shielded conductors to eliminate radio frequency interference (RFI).

Automatic Electric Heat Lockout Switch

Two-pipe fan-coil units with auxiliary electric heat have an automatic electric heat lockout switch that disengages the electric heat when hydronic heat enables. If the unit has a factory piping package and electric heat, the factory attaches the switch to the supply water pipe. When the lockout switch detects the supply water temperature above 95°F, it disengages the electric heat. This eliminates electric heat and hydronic heat working simultaneously.

UNT-SVX07B-EN

UNT-SVX07B-EN

Installation—Mechanical

If the fan-coil unit does not have a factory piping package, the switch and coiled lead wires ship inside the piping side end panel. The installer should position the lockout switch on the supply water line of the unit by sliding its spring connector over the pipe. See Figure 7 .

Figure 7.

Electric heat lock out switch installed

Venting the Hydronic Coil

The hydronic coil contains a vent, either manual or automatic, to release air from the unit. This vent is not sufficient for venting the water piping system in the building.

The coil air vent is on the piping side, above the coil connections on the unit. See Figure 8 and

Figure 9 . Perform the following steps to vent the coil after installing the unit.

Figure 8.

Manual coil air vent with set screw

41

Installation—Mechanical

Figure 9.

Manual coil air vent with Shrader fitting

42

1.

Pressurize the building piping system with water and vent any trapped air at system vents.

2. For units with manual air vents, back the set screw out to expel air from the unit and then retighten the set screw.

The automatic air vent should require no adjustment for the coil to vent. However, if the coil does not vent immediately, unscrew the outer portion of the fitting to expel air from the port.

If debris has become trapped in the vent, completely remove the outer portion of the fitting and clean.

External Insulating Requirements

Insulate and vapor seal surfaces colder than surrounding air dew-point a to prevent unplanned condensation. Trane recommends field-insulation of the following areas to prevent potential condensate problems:

1.

Supply and return water piping connections

2. Condensate drain lines and connections

3. Fresh air intake duct connections

4. Discharge duct connections

5. Wall boxes

Balancing The Manual Circuit Setter Valve

The manual circuit setter valve is an optional end valve supplied on the return pipe of the factory piping package. The valve allows the operator to regulate water flow through the hydronic coil, balance the water flow through the unit with other units in the piping system, and serves as a shutoff or end valve. See Figure 10 .

UNT-SVX07B-EN

Figure 10. Manual circuit setter valve

Figure 11. Automatic circuit setter valve

Installation—Mechanical

Figure 12. Automatic circuit setter valve

UNT-SVX07B-EN

Perform the following procedure to set maximum water flow through the coil:

1.

Establish water flow through the coil. Perform an open override of the valve if the control valve is closed to the coil, either manually or by Tracer.

If the piping package has two-position, normally closed valves: Drive open the valve using a

24 V signal.

If the piping package has two-position, normally open valves: Manually drive open the valve by removing power to the valve.

43

Installation—Mechanical

If the piping package has modulating valves: To manually drive the valve open, depress the button stem on top of the valve and push the lever located on the side of the valve to the full open position.

2. For presetting, use the appropriate valve curve shown in Figure 13, p. 45 to determine which setting is necessary to achieve the appropriate pressure drop. The “M” line is the appropriate line.

3. Carefully remove the Schrader pressure port connection caps on the manual circuit setter, since they will be at the same temperature as the pipeline.

4. Bleed all air from the hoses and meter before reading the pressure drop. Refer to the gauge operating instructions.

5. Adjust the circuit setter valve by turning the valve stem until the appropriate pressure drop is achieved.

6. After achieving the proper setting, slightly loosen the two socket head cap screws and rotate the memory stop around until it touches the back side of the indicator. Then tighten the screws to securely set the open memory position. The memory stop indicates the last set open position.

7.

If using a three-way valve: close the control valve to the coil, with the differential pressure meter still connected. This will divert flow to the bypass side of a three-way valve.

Adjust the balancing fitting to obtain the same pressure drop across the circuit setter valve as in step two when the control valve was open to the coil.

44 UNT-SVX07B-EN

Figure 13. Manual circuit setter valve, differential pressure vs. flow

Installation—Mechanical

UNT-SVX07B-EN 45

Installation—Mechanical

Note:

Instructions for using this chart appear on the preeding page. For the manual circuit setter provided with fan-coil or Force-Flo units, use the ‘M’ .

NOTICE

Coil Damage!

In all steam coil installations, the condensate return connections must be at the low point of the coil to ensure condensate flows freely from the coil at all times. Failure to do so could cause physical coil damage from water hammer, unequal thermal stresses,freeze-up and/or corrosion.

1.

Make piping connections to the steam coil as shown in Figure 15 . Cap the unused connection.

2. The coil is already pitched within the unit to provide proper pitch to drain condensate out of the coil. Verify that the unit has been properly leveled.

3. Install a 1/2-inch, 15-degree swing check vacuum breaker in the unused condensate return tapping as close as possible to the coil.

4. Vent the vacuum breaker line to atmosphere or connect it into the return main at the discharge side of the steam trap.

5. Pitch all steam supply and return mains down a minimum of one inch per ten feet in the direction of flow.

6. Do not drain the steam mains or take-off through the coils. Drain the mains ahead of the coils through a steam trap to the return line.

7.

Overhead returns require one psig of pressure at the steam trap discharge for each two-feet elevation to ensure continuous condensate removal.

8. Proper steam trap selection and installation is necessary for satisfactory coil performance and service life. For installation, use the following steps: a. Position the steam trap discharge at least 12 inches below the condensate return connection.

This provides sufficient hydrostatic head pressure to overcome trap losses and ensure complete condensate removal.

b. Trane recommends using flat and thermostatic traps because of gravity drain and continuous discharge operation.

c. Use float and thermostatic traps with atmospheric pressure gravity condensate return, with automatic controls or where the possibility of low pressure supply steam exists.

d. Always install strainers as close as possible to the trap inlet side. Reference Figure 14 for an example of a properly piped steam coil.

46 UNT-SVX07B-EN

Installation—Mechanical

Figure 14. Typical piping for steam coils

Code of System Components in Piping Diagram

FT Float and thermostatic steam trap

BT Bucket steam trap

GV Gate valve

OV Automatic two-position (on-off) control valve

TV Automatic three-way control valve

VB Vacuum breaker

CV Check valve

ST Strainer

AV Automatic or manual air vent

Figure 15. Main steam coil connection diagram

v ac uum bre a ker ( if des i red) ste a m supply plugged c ondens a te return

UNT-SVX07B-EN 47

Installation—General

Installing the Unit

Follow the procedures below to install the unit properly. Refer to “Dimensions and Weights,” p. 14 for specific unit dimensions and mounting hole locations.

Vertical Units

NOTICE

Electrical Wiring!

Do not allow electrical wire to fall between the unit and installation surface. Failure to comply may result in electrical shorts or difficulty accessing wires.

Install vertical units in an upright position using the 5/8-inch diameter double key slot hanger holes, located on the back of unit. The hanger holes allow a maximum shank size of 5/16-inch diameter threaded rods or lag screws (installer provides).

1.

Prepare wall openings for recessed units. Reference unit submittal for each unit size dimensions. When installing vertical units, consideration should be given for units with an outside air intake.

2. If the unit has leveling legs, adjust them correctly to level unit.

3. Mark the position of the keyslot hanger holes on the wall according to the dimensions given in “Dimensions and Weights,” p. 14 for each unit model and size. Align the hole locations evenly.

4. Insert the threaded rods or lag screws in the wall before setting the unit in place.

5. Remove the front panel (cabinet unit only) by lifting it upward.

6. Position the hanger holes, located on the back of the unit, over the rod or lag screw heads, pushing the unit downward to properly position.

7.

Complete piping and wiring connections, in addition to any necessary ductwork to the unit as instructed in the following sections. Ensure that the auxiliary drain pan is in position on fan-coil units.

8. Install the front panel before starting the unit.

On cabinet units, replace the front panel by aligning the bottom tabs on the unit with the respective slots on the panel bottom. Slide the front panel down onto the tabs while holding the panel close as possible to the cabinet. While the bottom tabs are engaged, slide the front panel upward enough to allow the top engaging edge of the front panel to lap over the engaging edge of the unit. This should allow the panel to drop down and lock into position.

On recessed units, install the front panel by aligning and locking together the interlocking support channel of the panel and unit. While holding the panel against the unit, tighten the screws at the top of the panel until it fits tight against the unit’s front. Do not over tighten the screws.

NOTICE

Motor Overload!

All unit panels and filters must be in place prior to unit startup. Failure to have panels and filters in place may cause motor overload.

Horizontal Units

Install horizontal units suspended from the ceiling using the four 5/8-inch diameter double key slot hanger holes, located on the top of the unit. The hanger holes allow a maximum shank size of

5/16-inch diameter threaded rods or lag screws (installer provided). Follow the installation procedure below.

48 UNT-SVX07B-EN

Installation—General

Note:

Follow the requirements of National Fire Protection Association (NFPA) Standard 90A or

90B, concerning the use of concealed ceiling spaces as return air plenums.

1.

Prepare the ceiling opening for recessed units. Reference the unit submittals for dimensions.

2. Position and install the suspension rods or a suspension device (supplied by installer) according to the unit model and size in “Dimensions and Weights,” p. 14 .

3. On cabinet units, remove the bottom panel by using a 5/32-inch Allen wrench to unscrew fasteners. Swing the panel down and lift outward.

4. Level the unit by referencing the chassis end panels. Adjust the suspension device.

5. Complete piping and wiring connections, in addition to any necessary ductwork as instructed in the following sections. Ensure that the auxiliary drain pan is in position on fan-coil units.

6. Install the bottom panel before starting the unit.

7.

Ensure condensate drain line is pitched one inch per ten feet of pipe away from the fan-coil unit.

Cabinet Units

Install the bottom panel by placing the hinged end on the unit’s hinged end (always at the return end of the unit). Refer to “Dimensions and Weights,” p. 14 for keyslot hanger hole locations. Swing the panel upward into position. Secure the panel with the fasteners provided. Do not overtighten the fasteners.

Recessed Units

Refer to “Dimensions and Weights,” p. 14 for mounting locations and unit weights. Follow the procedure below and see Figure 16, p. 50 .

1.

Insert the mounting bolts through the panel brackets of the trim ring and secure to the hanger holes on the unit. Tighten the mounting bolts to pull the trim ring snug against the finished ceiling.

2. Install the bottom panel by placing the hinged end on the trim ring hinged end (always at the unit’s return end).

3. Adjust the expansion collar’s inner duct (only on fan-coil units with a bottom return) to ensure a tight fit against the insulation located on the perimeter of the bottom panel’s return louver.

4. Close the s-hook on each end of safety chain assembly. Insert s-hooks through holes in unit and door. Close s-hook on door.

5. Insert retaining screws through bottom panel door and place retaining rings on screws.

6. Swing the bottom panel upward into position. Hook the safety chain to the bottom panel and the unit. Tighten the panel to the unit with the fasteners provided.

NOTICE

Unit Leveling!

All unit panels and filters must be in place prior to unit start-up. Failure to have panels and filters in place may cause motor overload.

UNT-SVX07B-EN 49

Installation—General

Figure 16. Installing the trim ring assembly on horizontal recessed units

Notes:

•

The trim ring assembly cannot accomodate unlevel ceilings.

•

On sizes 8, 10, and 12 center installation position and use 2- or 3.5-inch bolts, whichever is best suited for installation. Also, install two safety chains assemblies on these sizes.

•

Expansion collar is furnished with fan-coil with bottom return only. The collar is not necessary for Force-Flo units.

Installation Checklist

The following checklist is only an abbreviated guide to the detailed installation procedures given in this manual. Use this list to ensure all necessary procedures are complete. For more detailed information, refer to the appropriate sections in this manual.

50 UNT-SVX07B-EN

UNT-SVX07B-EN

Installation—General



WARNING

Hazardous Voltage w/Capacitors!

Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors. Verify with an appropriate voltmeter that all capacitors have discharged. Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury.

†

1.

Inspect the unit for shipping damage.

†

2. Level installation location to support the unit weight adequately. Make all necessary wall or ceiling openings to allow adequate air flow and service clearances.

†

3. Ensure the unit chassis is installed level.

NOTICE

Unit Leveling!

The unit must be installed level (zero tolerance) in both horizontal axis for proper operation. Do not use the coil or drain pan as the reference point because the coil may be pitched and the drain pan has an inherent positive slope to provide proper drainage.

†

4. Verify that wall and ceiling openins are properly cut per the unit submittals.

†

5. Verify that installation of horizontal concealed units meets the national Fire Protection

Association (N.F.P.A.) Standard 90A or 90B concerning the use of concealed ceiling spaces as return air plenums. Verify correct ceiling opening dimensions on unit submittals.

Secure the unit and any accessory items properly to the wall or ceiling support rods.

†

6. Complete all piping connections correctly.

†

7.

Check field sweat connections for leaks and tighten the valve stem packing, and piping pkg unions if necessary.

†

8. Install the auxiliary drain pan properly under piping package on fan-coil units.

†

9. Complete condensate drain line connections on fan-coil units.

†

10. Pitch condensate drain line away from fan-coil one-inch drop per ten feet of pipe.

†

11. Install automatic changeover sensor option on the supply water line, if applicable.

†

12. Install automatic electric heat lockout switch option on the supply water line, if applicable.

†

13. Install condensate overflow switch option correctly on the auxiliary drain pan, if applicable.

†

14. Ensure the low temperature detection device option is correctly installed.

†

15. Complete all necessary duct connections.

†

16. Complete all interconnection wiring for the wall-mounted fan mode switch or zone sensor per the wiring schematic and guidelines established in “Wall-Mounted Control

Interconnection Wiring,” p. 60 .

†

17. Install the wall-mounted fan mode switch, or zone sensor module options properly.

For wireless zone sensors, be sure to set the address (see “Address Setting,” p. 68 ).

†

18. Connect electrical supply power according to the NEC and unit wiring diagrams.

†

19. Remove any miscellaneous debris, such as sheetrock dust, that may have infiltrated the unit during construction.

†

20. Replace the air filter as required.

51

Installation—Controls

Control sensor options include both unit-mounted (factory-installed) and wall-mounted sensors.

Installation instructions for the wall-mounted sensors are provided in this chapter.

General Information

Control Options (Including Factory-Installed)

Tracer ZN010 Options

Unit-mounted zone sensor:

Digit 30 = E and Digit 31 = V

X13790843-01

Tracer ZN510 and ZN520 Options

Wall-mounted zone sensor:

Digit 30 = F or G and Digit 31 = 1

X13511530-01 (wall)

X13651467-02 (comm)

Wall-mounted zone sensor:

Digit 30 = E and Digit 31 = W

X13790841-01

Wall-mounted zone sensor:

Digit 30 = F or G and Digit 31 = 2

X13790842-01 (wall)

X13651467-02 (comm)

Split-mounted zone sensor, unit-mounted fan mode and wall-mounted setpoint dial:

Digit 30 = E and Digit 31 = X

X13511529-01 (wall)

X13790849-01 (unit)

Split-mounted zone sensor, unit-mounted fan mode and wall-mounted setpoint dial:

Digit 30 = F or G and Digit 31 = Y

X13511527-01 (wall)

X13790849-01 (unit)

X13651467-02 (comm)

Unit-mounted zone sensor:

Digit 30 = F or G and Digit 31 = Z

X13790844-01

52 UNT-SVX07B-EN

Installation—Controls

Tracer ZN510 and ZN520 Options (continued)

Wall-mounted wired display sensor with setpoint adjustment:

Digit 30 = F or G and Digit 31 = 4

X13790886-04 (wall)

Wall-mounted wireless temperature sensor (WTS)

(setpoint adjustment, no fan speed adjustment) and unit-mounted receiver:

Digit 30 = F or G and Digit 31 = 6

X13790821-01 (wall)

X13790860-02 (unit)

Wall-mounted wireless display sensor (WDS) and unit-mounted receiver:

Digit 30 = F or G and Digit 31 = 7

X13790822-04 (wall)

X13790860-02 (unit)

Installing Wall-Mounted Wired Sensors

Reference the wall-mounted zone sensor dimensions in Figure 17, p. 54 . Position the sensor on an inside wall three to five feet above the floor and at least 18 inches from the nearest outside wall.

Installing the sensor at a lower height may give the advantage of monitoring the temperature closer to the zone, but it also exposes the sensor to airflow obstructions. Ensure that air flows freely over the sensor.

UNT-SVX07B-EN 53

Installation—Controls

Figure 17. Wall-mounted zone sensor dimensions

0.31 in (8 mm)

TYP R.07 in (R1.9) mm

2.9 in (73.5 cm)

TYP 0.24 in (6 mm)

1.08 in (27.5 mm)

0.12 in (3 mm)

54

3.39 in (86 mm)

4.68 in (118.9 mm)

0.63 in (15.9 mm)

1.45 in (36.8 mm)

2.48 in (63 mm)

2.62 in (66.5 mm)

Sensor

When selecting a sensor location, avoid the following:

• Areas of direct sunlight

• Areas in the direct airstream of air diffusers

• Exterior walls and other walls that have a temperature differential between the two sides

• Areas that are close to heat sources such as sunlight, appliances, concealed pipes, chimneys, or other heat-generating equipment

• Drafty areas

• Dead spots behind doors, projection screens, or corners

• Walls that are subject to high vibration

• Areas with high humidity

• High traffic areas (to reduce accidental damage or tampering)

• Metal barriers between the receiver and the sensor (for example, plastered walls with metal lathe or metal roof decks)

• Thick, solid concrete walls between the receiver and the sensor

• Placing the sensor inside metal enclosures

UNT-SVX07B-EN

Installation—Controls

Height Requirements

It is recommended that you mount the back plate a maximum distance of 54 inches above the floor.

If a parallel approach by a person in a wheelchair is required, reduce the maximum height to

48 inches.

Note:

Consult section 4.27.3 of the 2002 ADA (Americans with Disability Act) guideline, and local building codes, for further details regarding wheelchair requirements.

Mounting Surfaces

Using the hardware provided, mount the back plate of the sensor to a flat surface such as sheetrock or plaster, or an electrical junction box. The sensor must be mounted plumb for accurate temperature control and to ensure proper air movement through the sensor.

• If mounting onto sheetrock or plaster, use the plastic threaded anchors (pre-drilling holes is not usually necessary) and the two M3.5 x 20 mm mounting screws.

• For mounting onto an electrical junction box, use the two 6-32 x 3/4 in. screws.

Before beginning installation, consider the location considerations below. Also, refer to the unit wiring schematic for specific wiring details and point connections.

Location Considerations

Avoid mounting the sensor in an area subject to the following conditions:

• Dead spots, such as behind doors or in corners that do not allow free air circulation.

• Air drafts from stairwells, outside doors, or unsectioned hollow walls.

• Radiant heat from the sun, fireplaces, appliances, etc.

• Airflow from adjacent zones or other units.

• Unheated or uncooled spaces behind the controller, such as outside walls or unoccupied spaces.

• Concealed pipes, air ducts, or chimneys in partition spaces behind the controller.

Fan Mode Switch Installation

The fan mode switch ships loose inside the unit accessory bag. Follow the steps below to install the fan mode switch.

Items needed:

2 x 4 electrical junction box

1.

Remove the brown wire if not using a field-supplied damper.

2. Remove the terminals, cut and strip wires as required for installation.

3. Level and position a 2 x 4 electrical junction box.

4. Follow the instructions given in “Wall-Mounted Control Interconnection Wiring,” p. 60 and route the wires as shown in the wiring diagram. Refer to the typical wiring diagram or to the unit specific diagram on the unit.

5. Position the fan mode switch over the junction box with the two screws supplied.

Wired Zone Sensor Installation

Follow the procedure below to install the wired zone sensor module.

1.

Note the position of the setpoint adjustment knob and gently pry the adjustment knob from the cover using the blade of a small screwdriver.

2. Insert the screwdriver blade behind the cover at the top of the module and carefully pry the cover away from the base.

3. To mount the sensor back plate:

UNT-SVX07B-EN 55

Installation—Controls

a. Hold the back plate against the mounting surface and mark the screw locations.

b. Secure the back plate against the mounting surface using included hardware.

4. To install the zone sensor module to a standard junction box: a. Level and install a 2“ x 4” junction box (installer supplied) vertically on the wall.

b. Pull the control wires through the cutout. Attach the module to the wall using the screws provided.

5. Strip the insulation on the interconnection wires back 0.25-inch and connect to TB1.

6. Screw down the terminal blocks.

7.

To replace the cover: a. Hook the cover over the top of the back plate. Apply light pressure to the bottom of the cover until it snaps in place.

b. Install the security screw into the bottom of the cover (if desired).

If installing a Tracer ZN510 or Tracer ZN520 zone sensor, see “Tracer ZN510 and ZN520 Options,” p. 52 and p. 53 for more information.

Installing Wall-Mounted Wireless Zone Sensors

General Information

This section provides a description of the sensors, as well as part numbers and dimensions.

Product Description

Trane

®

wireless sensor sets are compatible with any Trane unit controller that uses a standard 10 k

Ω

temperature input. The sets include sensor, receiver, wiring harness, and two AA lithium batteries. No further software or hardware is necessary for site evaluation, installation, or maintenance. Zone temperature is standard on all models.

Note:

A service tool cannot be connected to a Trane wireless sensor.

Trane wireless sensors include the following models:

Wireless Display Sensor (Model WDS)

This configurable sensor has an LCD display. It provides the same functions as many currently available Trane wired sensors. Configurable features for fan-coils include:

• Temperature units: Fahrenheit (ºF) or Celsius (ºC)

• Temperature resolution: 1.0, 0.5, or 0.1 degrees

• Ability to display setpoint only (zone temperature does not display)

• Single or no setpoint

• Fan settings: high, medium, low, auto, off

• Timed override request function

• Lockable settings to protect agains unauthorized use

• Service pin request

Wireless Temperature Sensor (Model WTS)

This sensor measures and transmits the zone temperature only.

Dimensions

The following illustration provides specific dimension details. The dimensions are the same for all wireless sensor models.

56 UNT-SVX07B-EN

Installation—Controls

0.31 in (8 mm)

TYP R.07 in

(R1.9 mm)

2.9 in (73.5 mm)

0.12 in (3 mm)

TYP 0.24 in (6 mm)

1.08 in (27.5 mm)

3.39 in (86 mm)

4.68 in (118.9 mm)

0.63 in (15.9 mm)

1.45 in (36.8 mm)

2.62 in (66.5 mm)

Location Considerations

Placement of the sensor is critical to proper operation (the receiver is factory mounted on fan-coil units). For most installations, barriers limit proper radio signal strength more than distance. For best radio transmission range and reliability, mount the receiver and sensor in line of sight. Where this is not possible, try to minimize the number of barriers between the pair of devices. In general, sheetrock walls and ceiling tiles offer little restriction to the transmission of the radio signal throughout the building.

The transmission range for the sensor is as follows:

• Open range: 2,500 ft (762 m) (packet error rate = 2%)

• Usable range: 200 ft (61 m)

• Typical range: 75 ft (23 m)

Mounting the Sensor Back Plate

To mount the sensor back plate:

1.

Hold the back plate against the mounting surface and mark the screw locations.

2. Secure the back plate against the mounting surface using included hardware.

The following figure shows an example of mounting the back plate of the sensor into sheetrock or plaster.

UNT-SVX07B-EN 57

Installation—Controls

Replacing the Sensor Cover

To replace the cover:

1.

Hook the cover over the top of the back plate. Apply light pressure to the bottom of the cover until it snaps in place.

2. Install the security screw into the bottom of the cover (if desired).

58

Security screw

UNT-SVX07B-EN

Installation—Electrical

Unit Wiring Diagrams

Specific unit wiring diagrams, based on unit options ordered, are provided inside each unit and can be easily removed for reference. Use these diagrams for connections or trouble analysis. Wiring diagrams are attached on the inside of the front panel of vertical cabinet and recessed models and on the fan and motor panel of vertical concealed and all horizontal models.

Supply Power Wiring



WARNING

Hazardous Voltage w/Capacitors!

Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors. Verify with an appropriate voltmeter that all capacitors have discharged. Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury.

Refer to the unit nameplate to obtain the minimum circuit ampacity (MCA) and maximum fuse size

(MFS) or maximum circuit breaker (MCB) to properly size field supply wiring and fuses or circuit breakers.

Refer to the unit operating voltage listed on the unit wiring schematic, submittal, or nameplate.

Reference the wiring schematic for specific wiring connections.

NOTICE

Use Copper Conductors Only!

Unit terminals are not designed to accept other types of conductors. Failure to use copper conductors may result in equipment damage.

Note:

All field wiring should conform to NEC and all applicable state and local code requirements.

The control panel box is always on the end opposite the piping connections. Access the control box by removing the two screws that secure the front cover. This will allow the panel to be removed, to provide access to the electrical components.



WARNING

Hazardous Electrical Shorts!

Insulate all power wire from sheet metal ground. Failure to do so may cause electrical shorts that could result in death or serious injury.

If the unit does not have a disconnect switch, the power leads and capped ground wire are inside the control panel.

If the unit has a disconnect switch, the power leads are wired to the junction box switch on the control panel. Pull the capped ground wire into the junction box.

Electrical Grounding Restrictions

All sensor and input circuits are normally at or near ground (common) potential. When wiring sensors and other input devices to the Tracer controller, avoid creating ground loops with grounded conductors external to the unit control circuit. Ground loops can affect the measurement accuracy of the controller.

UNT-SVX07B-EN 59

Installation—Electrical

NOTICE

Equipment Damage!

Unit transformer IT1 provides power to fan-coil unit only. Field connections to the transformer

IT1 may create immediate or premature unit component failure.

All input/output circuits (except isolated relay contacts and optically isolated inputs) assume a grounded source, either a ground wire at the supply transformer to control panel chassis, or an installer supplied ground.

Wall-Mounted Control Interconnection Wiring

The installer must provide interconnection wiring to connect wall-mounted devices such as a fan mode switch or zone sensor module.

Refer to the unit wiring schematic for specific wiring details and point-to-point wiring connections.

Dashed lines indicate field wiring on the unit wiring schematics. All interconnection wiring must conform to NEC Class 2 wiring requirements and any state and local requirements.

Refer to Table 3 for the wire size range and maximum wiring distance for each device.

Table 3.

Maximum wiring distances for low voltage controls (ft)

Fan Speed Switch

Zone Sensor

14–22 AWG

16–22 AWG

500

200

Recommendation: Do not bundle or run interconnection wiring in parallel with or in the same conduit with any high-voltage wires (110 V or greater). Exposure of interconnection wiring to high voltage wiring, inductive loads, or RF transmitters may cause radio frequency interference (RFI).

In addition, improper separation may cause electrical noise problems. Therefore, use shielded wire

(Beldon 83559/83562 or equivalent) in applications that require a high degree of noise immunity.

Connect the shield to the chassis ground and tape at the other end.

Note:

Do not connect any sensor or input circuit to an external ground connection.

Table 4.

Low vertical free-discharge motors, 115 volt

Size

03

04

FLA

0.7

0.8

HP (kW)

0.03 (0)

0.03 (0)

H

RPM

1090

M 770

L

H

560

1090

M 750

L 560

06 1.1

0.03 (0) H 1115

M 760

L 560

Note:

Actual rpm will vary with application and configuration

Table 5.

Decimal to fractional HP (kW) conversion

FC

02

Decimal

0.03

Fraction

1/30

03

0.07

0.04

0.05

0.08

1/15

1/25

1/20

1/12

Note:

Fractional HP (kW) values are approximate values and not necessarily actual HP (kW).

60 UNT-SVX07B-EN

UNT-SVX07B-EN

Installation—Electrical

Table 5.

Decimal to fractional HP (kW) conversion (continued)

FC Decimal Fraction

04

06

0.05

0.06

0.10

0.13

0.07

0.12

0.16

0.24

1/20

1/16

1/10

1/8

1/15

1/8

1/6

1/4

08

10

12

0.05

0.06

0.10

0.13

0.05

0.06

0.10

0.12

0.13

0.24

0.07

0.12

0.16

0.24

0.12

0.13

0.24

1/20

1/16

1/10

1/8

1/20

1/16

1/10

1/8

1/8

1/4

1/15

1/8

1/6

1/4

1/8

1/8

1/4

0.13

0.24

1/8 1/4

Low Vertical - 03, 04, 06 0.03

1/30

Note:

Fractional HP (kW) values are approximate values and not necessarily actual HP (kW).

Table 6.

Free-discharge motors on units with two-row, electric, or steam coils

Unit

Size

02

FLA

0.60

115 Volt hp (kW)

0.03 (0.02)

208–230 Volt

FLA hp (kW)

0.3

0.03 (0.02)

277–480 Volt

FLA hp (kW)

0.2

0.03 (0.02)

H

980

03

04

06

08

10

0.70

0.90

1.20

1.40

0.90

1.20

0.04 (0.02)

0.05 (0.04)

0.07 (0.05)

0.12 (0.09)

0.05 (0.04)

0.07 (0.05)

0.4

0.5

0.6

0.9

0.5

0.6

0.04 (0.02)

0.05 (0.04)

0.07 (0.05)

0.12 (0.09)

0.05 (0.04)

0.07 (0.05)

0.3

0.4

0.5

0.6

0.4

0.5

0.04 (0.02)

0.05 (0.04)

0.07 (0.05)

0.12 (0.09)

0.05 (0.04)

0.07 (0.05)

12 0.90

0.05 (0.04) 0.5

0.05 (0.04) 0.4

0.05 (0.04) 1050

1.40

0.12 (0.09) 0.9

0.12 (0.09) 0.6

0.12 (0.09) 108

Note:

Actual rpm will vary with application and configuration. Size 10 and 12 units have two motors.

980

1050

1030

1080

1050

1030

rpm

M

840

780

780

780

800

780

780

780

800

L

655

580

580

580

600

580

580

580

600

Table 7.

High-static motors on units with two-row, electric, or steam coils

Unit

Size

2

FLA

1.10

115 Volt hp (kW)

0.07 (0.05)

FLA

0.6

208–230 Volt hp (kW)

0.07 (0.05) 0.5

277–480 Volt

FLA hp (kW)

0.07 (0.05)

H

1480

6

8

3

4

10

1.40

1.60

2.60

3.40

0.08 (0.06)

0.10 (0.07)

0.16 (0.12)

0.24 (0.18)

0.7

0.8

1.2

1.4

0.08 (0.06)

0.10 (0.07)

0.16 (0.12)

0.24 (0.18)

0.6

0.7

1

1.1

0.08 (0.06)

0.10 (0.07)

0.16 (0.12)

0.24 (0.18)

1400

1475

1400

1475

12

1.60

2.60

1.60

3.40

0.10 (0.07)

0.16 (0.12)

0.10 (0.07)

0.24 (0.18)

0.8

1.2

0.5

0.9

0.10 (0.07)

0.16 (0.12)

0.10 (0.07)

0.24 (0.18)

0.7

1

0.7

1.1

0.10 (0.07)

0.16 (0.12)

0.10 (0.12)

0.24 (0.18)

1475

1400

1475

1475

Note:

Actual rpm will vary with application and configuration. Size 10 and 12 units have two motors.

rpm

M

1110

1175

1315

1070

1285

1315

1070

1315

1285

L

865

860

1070

855

975

1070

855

1240

975

61

Installation—Electrical

Table 8.

Free-discharge motors on units with three- and four-row coils

Unit

Size FLA

115 Volt hp (kW)

208–230 Volt

FLA hp (kW)

277–480 Volt

FLA hp (kW) H

2

3

4

0.60

0.80

1.00

0.03 (0.02)

0.05 (0.04)

0.06 (0.04)

0.3

0.5

0.6

0.03 (0.02)

0.05 (0.04)

0.06 (0.04)

0.2

0.4

0.5

0.03 (0.02)

0.05 (0.04)

0.06 (0.04)

980

1080

1080

6

8

10

1.40

1.70

1.00

1.40

1.00

0.12 (0.09)

0.13 (0.10)

0.06 (0.04)

0.12 (0.09)

0.06 (0.04)

0.9

1.0

0.6

0.9

0.6

0.12 (0.09)

0.13 (0.10)

0.06 (0.04)

0.12 (0.09)

0.06 (0.04)

0.6

0.8

0.5

0.6

0.5

0.12 (0.09)

0.13 (0.10)

0.06 (0.04)

0.12 (0.09)

0.06 (0.04)

1080

1080

1080

1080

1080 12

1.70

0.13 (0.10) 1.0

0.13 (0.10) 0.8

0.13 (0.10) 1080

Note:

Actual rpm will vary with application and configuration. Size 10 and 12 units have two motors.

rpm

M

840

800

800

800

800

800

800

800

800

L

655

600

600

600

600

600

600

600

600

Table 9.

High-static motors on units with three- and four-row coils

Unit

Size FLA

115 Volt hp (kW)

208–230 Volt

FLA hp (kW)

277–480 Volt

FLA hp (kW) H

4

6

2

3

1.10

1.30

2.10

3.40

0.07 (0.05)

0.08 (0.06)

0.13 (0.10)

0.24 (0.18)

0.6

0.7

0.9

1.4

0.07 (0.05)

0.08 (0.06)

0.13 (0.10)

0.24 (0.18)

0.5

0.5

0.7

1.1

0.07 (0.05)

0.08 (0.06)

0.13 (0.10)

0.24 (0.18)

1480

1500

1580

1475

8

10

3.40

2.10

3.40

2.10

0.24 (0.18)

0.13 (0.10)

0.24 (0.18)

0.13 (0.10)

1.4

0.9

1.4

0.9

0.24 (0.18)

0.13 (0.10)

0.24 (0.18)

0.13 (0.10)

1.1

0.7

1.1

0.7

0.24 (0.18)

0.13 (0.10)

0.24 (0.18)

0.13 (0.10 )

1475

1580

1475

1580 12

3.40

0.24 (0.18) 1.4

0.24 (0.18) 1.1

0.24 (0.18) 1475

Note:

Actual rpm will vary with application and configuration. Size 10 and 12 units have two motors.

rpm

M

1110

1355

1375

1285

1285

1375

1285

1375

1285

L

865

1110

1240

975

975

1240

975

1240

975

Table 10. Fan-coil electric heat kW

Unit Size Unit Voltage kW

02 115 1.0

03

04

230

277

208

115

230

277

208

115

230

277

208

1.0

1.0

0.8

1.0

1.0

1.0

0.8

kW

1.5

1.5

1.5

1.1

1.5

1.5

1.5

1.1

kW

2.0

2.0

2.0

1.5

2.0

2.0

2.0

1.5

2.0

2.0

2.0

1.5

kW kW kW kW kW kW kW kW

1.9

2.5

2.5

2.5

1.9

1.9

2.5

2.5

2.5

2.3

3.0

3.0

3.0

2.3

3.0

62 UNT-SVX07B-EN

UNT-SVX07B-EN

Installation—Electrical

Table 10. Fan-coil electric heat kW (continued)

Unit Size Unit Voltage kW

06 115

08

10

12

230

277

208

115

230

277

208

230

277

208

115

230

277

208

115

kW kW

2.0

2.0

2.0

1.5

2.0

2.0

2.0

1.5

kW kW

3.0

3.0

3.0

2.3

3.0

3.0

3.0

2.3

3.0

3.0

2.3

3.0

3.0

3.0

2.3

3.0

kW kW kW kW kW kW

4.0

4.0

3.0

4.0

4.0

3.0

4.0

4.0

3.0

4.0

4.0

3.0

5.0

5.0

3.8

5.0

5.0

3.8

5.0

5.0

3.8

5.0

5.0

3.8

6.0

6.0

4.5

6.0

6.0

4.5

6.0

6.0

4.5

6.0

6.0

4.5

5.3

7.0

7.0

5.3

7.0

7.0

5.3

7.0

7.0

5.3

6.0

8.0

8.0

6.0

8.0

8.0

6.0

10.0

10.0

Table 11. Electric heat kW, low vertical fan-coil

Unit Size

3.0

Unit Voltage

115.0

kW

1.0

kW

1.5

kW

2.0

4.0

6.0

115.0

115.0

1.0

1.0

1.5

1.5

2.0

2.0

Note:

Low vertical units are only available with electric heat in combination with the two-row cooling coil.

kW

2.5

2.5

Minimum Circuit Ampacity (MCA) and Maximum Fuse Size (MFS) Calculations for Fan-Coils with Single Phase Electric Heat

Heater amps = (heater kW x 1000)/heater voltage

Note:

Use 120 V heater voltage for 115 V units. Use 240 V heater voltage for 230 V units.

MCA = 1.25 x (heater amps + all motor FLAs)

MFS or HACR type circuit breaker = (2.25 x largest motor FLA) + second motor FLA + heater amps

(if applicable)

HACR (heating, air-conditioning and refrigeration) type circuit breakers are required in the branch circuit wiring for all fan-coils with electric heat.

Select a standard fuse size or HACR type circuit breaker equal to the MCA. Use the next larger standard size if the MCA does not equal a standard size.

Standard fuse sizes are: 15, 20, 25, 30, 35, 40, 45, 50, 60 amps

Fan-coil electric heat MBh = (heater kW) (3.413)

63

Installation—Electrical

64

Table 12. Force-Flo single-stage, max kW electric heat

Unit Size Volts Hz Phase Wires Heater kW Heater amps/ph

02

03

04

277.0

208.0

240.0

480.0

208.0

240.0

277.0

208.0

208.0

240.0

277.0

208.0

240.0

480.0

208.0

240.0

60

60

60

1

1

1

3

3

3

1

1

1

3

3

3

1

1

1

3

2

2

2

3

3

4

2

2

2

3

3

4

2

2

2

3

2.25

3.0

3.0

2.25

3.0

3.0

4.5

6.0

6.0

4.5

6.0

6.0

5.7

7.5

7.5

5.7

06

240.0

480.0

208.0

240.0

60 1

1

3

3

2

2

3

4

7.5

7.5

18.1

9.1

7.9

38.0

10.5 43.8

277.0

208.0

240.0

480.0

1

3

3

3

2

3

3

4

10.5 38.0

7.9

10.5 25.3

10.5 12.7

Note:

All data based on individual units. Electric heat will operate only with fan at high speed.

21.9

21.7

12.6

14.5

7.3

27.5

31.3

27.1

15.9

10.9

12.5

10.9

6.3

7.3

3.7

21.7

25.0

Table 13. Force-Flo single stage, low kW electric heat

Unit Size Voltage # Wires

02

03

04

208/60/1

240/60/1

277/60/1

208/60/1

240/60/1

277/60/1

208/60/3

240/60/3

480/60/3

208/60/1

240/60/1

277/60/1

208/60/3

240/60/3

480/60/3

3

3

4

2

2

4

2

3

3

2

2

2

2

2

2

kW

3.0

2.3

3.0

3.0

2.3

3.0

3.0

3.0

3.0

2.3

3.0

0.8

1.0

1.0

2.3

amps/ph

3.7

10.9

12.5

10.9

6.3

7.3

3.7

3.7

4.2

3.7

10.9

12.5

10.9

6.3

7.3

kW

1.5

2.0

2.0

amps/ph

7.3

8.4

7.3

kW amps/ph

UNT-SVX07B-EN

UNT-SVX07B-EN

Installation—Electrical

Table 13. Force-Flo single stage, low kW electric heat (continued)

Unit Size Voltage # Wires

06 208/60/1 2

kW

2.3

amps/ph

10.9

kW

3.3

amps/ph

15.9

08

10

240/60/1

277/60/1

208/60/3

240/60/3

480/60/3

208/60/1

240/60/1

277/60/1

208/60/3

240/60/3

480/60/3

208/60/1

240/60/1

277/60/1

208/60/3

240/60/3

2

2

3

3

4

2

2

2

3

3

4

2

2

2

3

3

3.0

3.0

2.3

3.0

3.0

2.3

3.0

3.0

2.3

3.0

3.0

2.3

3.0

3.0

2.3

3.0

12.5

10.9

6.3

7.3

3.7

10.9

12.5

10.9

6.3

7.3

3.7

10.9

12.5

10.9

6.3

7.3

4.5

4.5

3.3

4.5

4.5

3.3

4.5

4.5

3.3

4.5

4.5

3.3

4.5

4.5

3.3

4.5

12

480/60/3

208/60/1

240/60/1

277/60/1

2

2

4

2

3.0

2.3

3.0

3.0

3.7

10.9

12.5

10.9

4.5

3.3

4.5

4.5

5.5

15.9

18.8

16.3

208/60/3

240/60/3

3

3

2.3

3.0

6.3

7.3

3.3

4.5

9.2

10.9

480/60/3 4 3.0

3.7

4.5

5.5

Note:

All data based on individual units. Electric heat will operate only with fan at high speed.

9.2

10.9

5.5

15.9

18.8

16.3

9.2

10.9

18.8

16.3

9.2

10.9

5.5

15.9

18.8

16.3

kW

7.5

6.6

9.0

9.0

7.5

7.5

5.7

7.5

4.5

6.0

6.0

4.5

6.0

6.0

5.7

6.6

9.0

9.0

amps/ph

Table 14. Force-Flo two-stage electric heat

Unit Size

02

03

Volts

208

480

208

240

277

240

277

208

240

208

240

480

Hz

60

60

Phase

1

1

1

3

1

3

3

1

1

3

3

3

Wires

2

2

2

4

2

3

3

2

2

3

3

4

1st Stage kW Total kW Total amps/ph

0.8

2.3

10.9

1.0

1.5

2.0

2.0

1.0

1.0

0.8

1.0

1.5

2.0

2.0

3.0

4.5

6.0

6.0

3.0

3.0

2.3

3.0

4.5

6.0

6.0

12.5

10.9

6.3

7.3

3.7

21.7

25.0

21.7

12.6

14.5

7.3

31.3

27.1

15.9

18.1

9.1

31.8

37.5

32.5

21.7

25.0

21.7

12.5

14.5

7.3

27.5

18.4

21.7

10.9

65

Installation—Electrical

Table 14. Force-Flo two-stage electric heat (continued)

Unit Size

04

Volts

208

Hz

60

Phase

1

Wires

2

1st Stage kW Total kW Total amps/ph

1.9

5.7

27.5

06

08

240

277

208

240

208

240

480

208

480

208

240

277

240

277

208

240

60

60

3

3

1

1

3

1

3

3

1

1

3

1

3

3

1

1

3

3

2

2

4

2

3

3

2

2

4

2

3

3

2

2

6.0

6.0

4.5

6.0

3.4

4.5

4.5

4.5

2.5

3.4

4.5

4.5

2.5

2.5

1.9

2.5

7.9

10.5

10.5

10.1

13.5

13.5

10.1

13.5

7.5

7.9

10.5

10.5

7.5

7.5

5.7

7.5

10

12

208

240

480

208

480

208

240

277

60

60

3

1

3

3

1

1

3

1

4

2

3

3

2

2

4

2

6.0

8.0

8.0

6.8

6.0

6.0

8.0

8.0

13.5

13.5

18.0

18.0

13.5

18.0

18.0

15.0

16.3

65.0

75.0

65.0

37.6

43.3

21.7

72.3

240

277

208

240

1

1

3

3

2

2

3

3

9.0

9.0

6.8

9.0

20.0

20.0

15.0

20.0

83.4

72.3

41.7

48.2

480 3 4 9.0

20.0

24.1

Note:

When both stages are on, the electric heat will operate only when fan is in high speed. All data based on individual units.

21.9

25.3

12.7

48.8

56.3

48.8

28.2

32.5

31.3

27.1

15.9

18.1

9.1

38.0

43.8

38.0

66 UNT-SVX07B-EN

Controls Interface

Wired Controllers—Communication Wiring

Units with Tracer ZN510 and ZN520 Only

Communications

Tracer ZN510 and ZN520 controllers are LonTalk

®

devices that interface with the Trane Tracer

Summit building management system. Reference the unit wiring diagram or submittals.

Ground shields at each Tracer ZN510 and ZN520, taping the opposite end of each shield to prevent any connection between the shield and anther ground. Refer to the most recent version of Trane publication CNT-SVX04A-EN (

Tracer ZN.520 Unit Controller: Installation, Operation and

Programming Guide

) for the communication wiring diagram.

Communication wire must conform to the following specification:

1.

Shielded twisted pair 18 AWG

2. Capacitance 23 (21–25) picofarads (pF) per foot

3. Listing/Rating—300 V 150C NEC 725-2 (b) Class 2 Type CL2P

4. Trane Part No. 400-20-28 or equivalent, available through Trane BAS Buying Group Accessories catalog.

Note:

Communication link wiring is a shielded, twisted pair of wire and must comply with applicable electrical codes.

Follow these general guidelines when installing communication wiring on units with a Tracer

ZN510 or ZN520 controller:

• Maintain a maximum 5000 ft. aggregate run.

• Install all communication wiring in accordance with the NEC and all local codes.

• Solder the conductors and insulate (tape) the joint sufficiently when splicing communication wire. Do not use wire nuts to make the splice.

• Do not pass communication wiring between buildings because the unit will assume different ground potentials.

• Do not run power in the same conduit or wire bundle with communication link wiring.

Note:

You do not need to observe polarity for LonTalk communication links.

Device Addressing

LonTalk devices are given a unique address by the manufacturer. This address is called a Neuron

ID. Each Tracer ZN510 and ZN520 controller can be identified by its unique Neuron ID, which is printed on a label on the controller’s logic board. The Neuron ID is also displayed when communication is established using Tracer Summit or Rover service tool. The Neuron ID format is 00-01-64-1C-2B-00.

Wire Characteristics

Controller communication-link wiring must be low capacitance, 18-gage, shielded, twisted pair with stranded, tinned-copper conductors. For daisy chain configurations, limit the wire run length to 5,000 ft. Truck and branch configurations are significantly shorter. LonTalk wire length limitations can be extended through the use of a link repeater.

Recommended Communication Wiring Practices

The following guidelines should be followed while installing communication wire.

• LonTalk is not polarity sensitive. Trane recommends that the installer keep polarity consistent throughout the site.

• Only strip away two inches maximum of the outer conductor of shielded cable.

UNT-SVX07B-EN 67

Controls Interface

• Make sure that the 24 Vac power supplies are consistent in how they are grounded. Avoid sharing 24 Vac between LonTalk UCMs.

• Avoid over-tightening cable ties and other forms of cable wraps. A tight tie or wrap could damage the wires inside the cable.

• Do not run LonTalk cable alongside or in the same conduit as 24 Vac power.

• In an open plenum, avoid lighting ballasts, especially those using 277 Vac.

• Do not use a trunk and branch configuration, if possible. Trunk and branch configurations shorten the distance cable can be run.

Wireless Temperature Sensor

Note:

Receivers ship installed on the unit. To remove the receiver, press in the retention tabs on the underside of the receiver enclosure (see Figure 18, p. 68 ) and push upward.

Figure 18. Retention tabs on underside of receiver enclosure

Address Setting

The process of establishing communication between a receiver and sensor is referred to as

association

. The following limitations apply:

• Each associated receiver/sensor set that communicates within the reception range of the wireless system must have a unique address.

It is not possible to associate more than one sensor to a receiver, nor is it possible to associate more than one receiver to a sensor.

To associate a receiver and sensor, the two devices must have their rotary address switches set to the same address.

Important:

Set the addresses before applying power to the receiver and before removing the insulation strip ( Figure 19, p. 69 ) from the sensor.

To set the receiver and sensor addresses:

1.

Using a small screwdriver, set the three rotary address switches (locations S1, S2, S3) on the receiver to an address between 001 and 999 (see Figure 19, p. 69 ). You do not have to remove the covers to access the rotary address switches.

Note:

Do not use 000 as an address. An address of 000 returns the receiver outputs to their factory defaults (zone temperature and setpoint outputs: 72.5°F [22.5°C]), removes all association knowledge, and prevents association with a sensor.

68 UNT-SVX07B-EN

Controls Interface

Figure 19. Setting the rotary address switches on the receiver and the sensor

Do not remove the insulation strip yet.

B1 +

LED1

LED2

LED3

SIGNAL

LED5

S1 S2

S3

POWER

S5

C33 C34

J1

S5

HEATING SET

FAN/SYSTEM

SETPOINT

ZONE

GND

24VAC/DC

GND

COMM +

COMM -

Receiver

LE

A

L

S4

C35

R77

Pb

Pb-FREE

LED1

LED2

LED3

SIGNAL

LED5

BATTERY

STATUS

S1 S2

ADDRESS

S3

STATUS

S4

WIRELESS

INSTALL

Sensor

2. Set the three rotary address switches (locations S1, S2, S3) on the sensor

to the same address as the receiver

(see Figure 19 ).

Note:

Do not use 000 as an address. An address of 000 removes all association knowledge, reverts the sensor to a low-power hibernation mode, and sends a disassociation request to the receiver.

3. Record the address and location of the receiver and sensor pair.

Observing the Receiver for Readiness to Associate

After initial power up, the receiver conducts a channel scan for 20 seconds. During this time, the receiver selects from 16 available channels the clearest channel on which to operate. LED1, LED2, and LED3 flash rapidly in succession (round-robin style) while the channel scan is in progress, as shown in part 1 of the illustration.

Important:

Do not attempt association (leave the insulation strip in place) until the channel scan is finished.

After the channel scan is finished, LED3 begins blinking (one-blink pattern) to show that the receiver is ready to be associated with a sensor (see part 2 of the following figure).

1

2

0

Sec.

20

LED3

UNT-SVX07B-EN 69

Controls Interface

Associating the Sensor to the Receiver

To associate the sensor to the receiver:

1.

Remove the sensor cover by firmly pressing the thumb tab at the bottom of the cover and pulling the cover away from the back plate.

2. Verify that the sensor is set to the same address as the receiver it is to be associated with.

3. Power the sensor by removing the insulation strip from between the two batteries.

Association is automatically initiated between the sensor and the receiver. When LED3 on the receiver stops blinking, association has been established.

If the first association attempt is unsuccessful, the sensor automatically re-attempts association with the receiver every 10 minutes.

Note:

An associated sensor that has lost communication with the receiver will transmit an association request every 50 minutes. You can manually initiate association (see “Manual

Association,” p. 120 ”).

Testing Signal Strength and Battery Status

To verify that the association process was successful and that the batteries have adequate charge:

1.

Firmly press and release the Test button on the bottom of the sensor (as illustrated below).

2. For model WTS, view LED1, LED2, and LED3 to determine the signal strength. View LED5 to determine the battery status (see the following figure for model WTS sensors).

Note:

The LEDs will turn Off after 5 seconds to conserve battery strength.

For model WDS, determine the signal strength and battery status by viewing the symbols on the sensor display (see the following figure for model WDS sensors).

3. Record the results in your commissioning statement.

Note:

For more information, see “Testing Signal Strength,” p. 117 and “Testing Battery Status,” p. 118 .

70 UNT-SVX07B-EN

Controls Interface

Model WDS sensor

Model WTS sensor

LED1

LED2

LED3

LED5

Test button

Test button

Push firmly, then release

Push firmly, then release

Configuring the Wireless Display Sensor (Model WDS only)

Note:

Sensors shipped with the fan-coil are pre-configured for three speeds.

The configuration of the sensor determines which system features can be accessed and changes can be made by the tenant (for example, changes to cooling/heating mode, setpoint, or fan speed.

Verify system and associated unit features before configuring the sensor.

The building owner or operator may choose to limit tenant access to certain features. This can be done through configuration. Or, if a sensor is configured to match all control capabilities of the building automation system, the locking feature can be used to restrict the tenant from making changes.

Configuration Procedure

To configure settings on the model WDS sensor, follow this procedure in the order presented.

1.

Press the configuration button for 3 seconds.

UNT-SVX07B-EN 71

Controls Interface

Configuration button

The display will change to configuration mode. When the sensor is in configuration mode, a wrench symbol appears on the display and the menus are separated by lines, as illustrated below.

2. Press the center button on the keypad to begin the configuration process.

Center button

72 UNT-SVX07B-EN

Controls Interface

3. Configure the sensor options in the order shown in the table.

•

Press or to scroll to the next selection (as illustrated).

•

Press or to move to the next menu (as illustrated).

Setting

Temperature

• Choose Fahrenheit or Celsius

• Choose the degree resolution

(whole degrees, half degrees, or tenths of degrees).

Configuration Options

.

.

.

.

.

Setpoint

.

no setpo i nt s i ngle setpo i nt du a l setpo i nt

System

Fan

Note:

Not all fan options are available for all systems.

no system opt i ons en a bled a uto/o ff a uto/o ff / low/h i gh

(Default) a uto/o ff /low med/h i gh

Occupancy (timed override)

o ff /h i gh (on) o ff /low/h i gh o ff /low/ med/h i gh no fa n opt i ons en a bled

UNT-SVX07B-EN

4. Review the display to ensure that you have selected the correct configuration.

5. To return the display to operating mode, press the configuration button (see Step 1 , p. 71 ).

Note:

The sensor will revert to operating mode if no buttons are pressed for 10 minutes.

73

Controls Interface

Optional Features

Displaying Setpoint or Temperature.

You can configure the sensor to display either the temperature (default) or setpoint. To select either option:

1.

Verify that the sensor is in operating mode and at the home screen.

2. Press the up and down arrows for 3 seconds. The arrow indicates setpoint display, as shown in the figure.

Arrow indicates setpoint is shown on display

Locking or Unlocking Settings.

You can lock or unlock the setpoint, system, or fan setting to prevent changes.

To lock or unlock a setting:

1.

Verify that the sensor is in operating mode and at the home screen.

2. Choose a setting to lock or unlock:

•

Select the setpoint by pressing the up or down arrow.

Setpoint

•

From the system menu press the down arrow to select the fan menu. Use the left or right arrow to choose the setting.

Fan menu

3. Press the left and right arrows for 4 seconds.

74 UNT-SVX07B-EN

Controls Interface

Note:

If you try to access a feature that is locked, the locked symbol will appear on the display.

If you press a keypad button to try change a locked setting, the locked symbol will flash.

Replacing the Sensor Cover

To replace the cover:

1.

Hook the cover over the top of the back plate. Apply light pressure to the bottom of the cover until it snaps in place.

2. Install the security screw into the bottom of the cover (if desired).

Security screw

Sensor Operations

Temporary Occupancy (Timed Override)

Temporary occupancy (timed override) is available on model WDS. Temporary occupancy is selected for after-business-hours adjustment of temperature setting, fan settings, or heat/cool settings, when the system has changed to unoccupied mode. System control will revert to unoccupied after a pre-determined time period.

Note:

Not all systems support the occupancy function.

Model WDS Sensor

To request and cancel temporary occupancy on a model WDS sensor, see “Requesting Temporary

Occupancy,” p. 78 .

End-of-Range Temperature Values

Receiver:

The end-of-range temperature limits of the receiver for

all models

are 32°F to 122°F (0°C to 50°C). The receiver cannot replicate temperature values outside this range. If the sensor transmits a temperature value to the receiver that is out of the receiver replication range, the receiver will “freeze” the output at the end-of-range values. This value will remain frozen until the transmitted temperature moves to between the end-of-range temperature limits.

Sensor:

The end-of-range temperature setpoint limits for the

model WDS sensor

is 50°F (10°C) to

89.6°F (32°C).

UNT-SVX07B-EN 75

Controls Interface

76

Receiver Power-up Sequence

When power is applied to the receiver, one of the following sequences occurs. The sequence is dependent on the address setting and the association status of the receiver.

Address set to 000 and receiver is not associated with a sensor

• LED5 is constantly On, indicating power is applied and the receiver is functional.

• All models: Zone temperature and cooling setpoint default to 72.5°F (22.5°C).

WDS only: The heating setpoint defaults to 70.5°F (21.4°C) and the fan/system output will be

2230

Ω

(see “Output Values—Failure and Default Modes of Operation,” p. 122 ).

• Status LED3 will display a 2-blink pattern diagnostic ( Table 39, p. 117 ).

Address set from 001 to 999 and receiver is not associated with a sensor

• LED5 is constantly On, indicating power is applied and the receiver is functional.

• All models: Zone temperature and cooling setpoint default to 72.5°F (22.5°C).

WDS only: The heating setpoint defaults to 70.5°F (21.4°C) and the fan/system output will be

2230

Ω

(see “Output Values—Failure and Default Modes of Operation,” p. 122 ).

• The receiver conducts an energy scan for 20 seconds to determine the clearest channel on which to operate.

• LED3 flashes On every 2 seconds when it is ready to accept a sensor association request. When an association request is made by a sensor, the receiver instructs the sensor on which power level to operate. Then the receiver and sensor begin operation at the appropriate channel and power level (see “Observing the Receiver for Readiness to Associate,” p. 69 ).

Address set from 001 to 999 (and not changed since most recent power-up) and receiver is associated with a sensor

• LED5 is constantly On, indicating power is applied and the receiver is functional.

• Zone temperature and setpoint default to 72.5°F (22.5°C). WDS only: Heating setpoint defaults to 70.5°F (21.4°C), Fan = Auto, System = Off.

• The receiver waits for a broadcast transmission from its associated sensor. When a transmission is received, the receiver positions its zone temperature and setpoint outputs appropriately.

• If the receiver does not receive a communicated signal from its associated sensor within 35 minutes, zone temperature and setpoint outputs fail, generating a unit controller alarm (see

“Output Values—Failure and Default Modes of Operation,” p. 122 ).

Note:

Once a receiver communicates to a WTS sensor, the receiver disables (opens) its zone setpoint output indefinitely.

Sensor Transmission Time and Temperature Variables

Sensor transition time variables are as follows:

• The maximum time between sensor temperature transmissions is 15 minutes.

• The minimum time between sensor temperature transmissions is 30 seconds.

• The minimum time for transmitting temperature setpoint changes is 10 seconds.

Note:

If a sensor transmits a message to the receiver and the receiver does not reply, the sensor will retransmit the message to the receiver every 30 seconds until communication to the receiver is re-established.

Sensor temperature time variables are as follows:

• The minimum change in zone temperature required to force a sensor transmission is:

– 0.2°F (0.11°C) when the temperature range is between 60°F (15.6°C) and 80°F (26.7°C)

– 0.5°F (0.28°C) when the temperature range is between 32°F (0°C) and 60°F (15.6°C) or between 80°F (26.7°C) and 122°F (50°C))

UNT-SVX07B-EN

Controls Interface

• The minimum change in temperature setpoint required to force a sensor transmission is:

– 0.1°C for a model WDS sensor

Operating Mode (Model WDS)

This section describes how to operate the Trane wireless sensor, model WDS. Figure 20 shows an example of a model WDS that has been configured and is in operating mode.

Figure 20. Wireless sensor (model WDS) in operating mode

Temperature

System settings (not available for fan-coil or Force-Flo units)

Fan settings

Test symbols (appear only when Test button is pushed

Occupancy indicator/Error code

Keypad

.

.

Test button

Changing Room Temperature

This symbol shows the current room temperature, or your setpoint selection while you are making an adjustment.

When you select a setpoint, this symbol appears.

1.

To increase the room temperature, press .

To decrease the room temperature, press

2. To confirm, press to the home screen.

.

or wait 5 seconds. The display will return

Changing Heating and Cooling Room Temperature Settings (applies to some systems)

Some systems allow you to select both heating and cooling room temperature settings. If your system has this option, this symbol appears when you adjust the temperature setting.

1.

Press or to select the heating/cooling setting.

2. If in cooling mode, press to change to heating mode. If in heating mode, press to change to cooling mode.

When you adjust the cooling setting, the top arrow and snowflake flash.

3. Press or to select the heating/cooling setting.

4. To confirm, press or wait 5 seconds. The home screen will

When you adjust the heating setting, the bottom arrow and flame flash.

appear.

UNT-SVX07B-EN 77

Controls Interface

Changing the Fan Setting

Indicates that the fan will operate as needed to reach the selected temperature.

1.

From the home screen, activate the fan setting menu by pressing

and then .

Indicates that the fan setting is On.

The number of arrows indicates fan speed

(3: high, 2: medium, 1: low).

The example shown indicates a fan on high speed. Not all systems offer all three speeds.

2. Press or choice by

to choose the desired fan setting.

3. When the symbol for the desired setting appears, confirm your

Indicates that the fan setting is Off.

•

Pressing (the home screen will appear), or

•

Pressing or

•

Waiting five seconds.

(the next menu will appear), or

Select to request occupancy

Select to cancel occupancy

Requesting Temporary Occupancy

• If you need heating or cooling after normal business hours, you can “request” temporary occupancy by pressing and holding it for 2 seconds. The occupied symbol remains on the screen and the unoccupied symbol disappears. After 30 seconds, the unoccupied symbol will re-appear.

• To cancel temporary occupancy, press and hold for 2 seconds. The unoccupied symbol will remain on the screen and the occupied symbol will disappear. After

30 seconds, the occupied symbol will re-appear.

Error Codes

Indicates an error code

If an error code (E0–E7) is displayed, technical assistance may be required.

Indicates that a setting is locked

Lock Symbol

The lock symbol appears if you try to adjust a setting that cannot be changed.

Testing Signal Strength

Indicates excellent signal strength

Indicates satisfactory signal strength

Indicates poor signal strength

Press the Test button to display the signal strength symbols.

Testing Battery Status

Indicates full battery power

Indicates 50% of battery life left.

Indicates 25% of battery life left.

Replace batteries.

Flashing symbol indicates that approximately 14 days of operation remain.

Press the Test button to display the battery status symbols.

Use only UL-listed non-rechargeable 1.5 V lithium AA batteries (Trane p/n X13770035010 or equivalent).

Wireless Sensor Specifications

The following table presents specifications for all models of the wireless sensor sets.

78 UNT-SVX07B-EN

UNT-SVX07B-EN

Controls Interface

Sensor operating temperature

Receiver operating temperature

Storage temperature

Storage and operating humidity range

Accuracy

Resolution

Setpoint functional range (WDS only)

Receiver voltage

Receiver power consumption

Housing

Mounting

Sensor battery

Range

(a)

Output power

Radio frequency

Radio channels

Address range

Minimum time between transmissions

Maximum time between transmissions

32ºF to 122ºF (0ºC to 50ºC)

-40ºF to 158ºF (-40ºC to 70ºC)

-40ºF to 185ºF (-40ºC to 85°C)

5% to 95%, non-condensing

0.5°F over a range of 55ºF to 85°F (12.8ºC to 29.4°C)

0.125ºF over a range of 60ºF to 80ºF (15.56ºC to 26.67°C)

0.25ºF when outside this range

50ºF to 89.6ºF (10ºC to 32ºC)

24 V nominal ac/dc ±10%

<1 VA

Polycarbonate/ABS blend, UV protected, UL 94-5VA flammability rating, suitable for application in a plenum

3.24 in (8.26 cm) for 2 mounting screws (supplied)

(2) AA, 1.5 V, 2800 mAh, lithium, 5-year life, UL listed

Open range: 2,500 ft (762 m) (packet error rate = 2%)

Usable: 200 ft (61 m)

Typical: 75 ft (23 m)

100 mW

2.4 GHz (IEEE Std 802.15.4-2003 compliant)

(2405 to 2480 MHz, 5 MHz spacing)

16

000 to 999

30 seconds

15 minutes

(a) Range values are estimated transmission distances for satisfactory operation. Actual distance is job specific and must be determined during site evaluation.

79

Controls Interface

United States compliance

(all models)

Canada compliance

(all models)

The following table presents agency compliance information for wireless sensor set models as shown.

IEEE compliance for radio frequency range

(all models)

UL listed: UL 94-5VA Flammability rating

UL 916: Energy management equipment

FCC CFR47, Section 15.247 & Subpart E Digital Modulation Transmission with no SAR (FCC Identification TFP-

13651127)

This device complies with Part 15 of the FCC Rules.

Operation is subject to the following two conditions:

1. This device may not cause harmful interference, and

2. This device must accept any interference received,

including interference that may cause undesired operation.

Warning:

Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

20 cm separation distance:

To comply with FCC’s RF exposure limits for general population/uncontrolled exposure, the antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.

CSA22.2 No. 205-M1983 Signal Equipment

Industry Canada (Certification no: IC: 6178A-13651127)

Industry Canada statement: the term “IC” before the certification/registration number signifies only that the Industry Canada technical specifications were met.

Section 14 of RSS-210:

The installer of this radio equipment must ensure that the antenna is located or pointed such that it does not emit RF field in excess of Health Canada limits for the general population.

IEEE 802.15.4-2003, IEEE Standard for Information Technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements, Part 15.4:

Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specifications for Low Rate Wireless

Personal Area Networks (LR-WPANs)

80 UNT-SVX07B-EN

Pre-Start

Pre-Startup Checklist

Complete this checklist after installing the unit to verify all recommended installation procedures are complete before unit startup. This does not replace the detailed instructions in the appropriate sections of this manual. Disconnect electrical power before performing this checklist. Always read the entire section carefully to become familiar with the procedures.



WARNING

Hazardous Voltage w/Capacitors!

Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors. Verify with an appropriate voltmeter that all capacitors have discharged. Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury.

Receiving

†

Inspect unit and components for shipping damage. File damage claims immediately with the delivering carrier.

†

Check unit for missing material. Look for ship-with options and sensors that may be packaged separately from the main unit (see “Receiving and Handling,” p. 11 ).

†

Check nameplate unit data so that it matches the sales order requirements.

Unit Location

1.

Ensure the unit location is adequate for unit dimensions, ductwork, piping, and electrical connections.

2. Ensure access and maintenance clearances around the unit are adequate.

Unit Mounting

1.

Ensure unit is installed level.

Component Overview

1.

Ensure the fan rotates freely in the correct direction.

2. Ensure all unit access panels and air grilles are in place.

3. Verify that a clean air filter is in place.

4. Properly set the damper position to meet the fresh air requirement.

Unit Piping

1.

Properly vent the hydronic coil to allow water flow through the unit.

2. Units with deluxe piping package: Tighten unions adequately.

3. Set water flow to the unit properly if unit piping has the circuit setter valve.

4. Check strainers (if supplied) for debris after apply system water.

5. Install the auxiliary drain pan and route the main drain pan hoses to the auxiliary drain pan on vertical fan-coil units.

6. Verify the condensate drain piping is complete for the unit drain pan.

7.

Ensure the drain pan and condensate line are not obstructed. Remove any foreign matter that may have fallen into the drain pan during installation.

UNT-SVX07B-EN 81

Pre-Start

Electrical

†

Check all electrical connections for tightness.

Note:

Some circumstances may require the unit to run before building construction is complete.

These operating conditions may be beyond the design parameters of the unit and may adversely affect the unit.

82 UNT-SVX07B-EN

Start-Up

Tracer™ ZN510 & ZN520 Unit Startup

Refer to the Trane publication, CNT-IOP-1 (

ComfortLink 10 Controller: Installation, Operation and

Programming Guide

) for Tracer ZN510 and CNT-SVX04A-EN for Tracer ZN520. The factory preprograms the Tracer ZN510 and ZN520 with default values to control the temperature and unit airflow. Use Tracer Summit building automation system or Rover™ software to change the default values.

Follow the procedure below to operate the Tracer ZN510 or ZN520 in a stand-alone operation:

1.

Turn power on at the disconnect switch option.

2. Position the fan mode switch to either high, medium, low, or the auto position.

3. Rotate the setpoint dial on the zone sensor module to 55°F for cooling or 85°F for heating.

The appropriate control valve will actuate assuming the following conditions:

1.

Room temperature should be greater than 55°F and less than 85°F.

2. For a 2-pipe fan-coil unit with an automatic changeover sensor, the water temperature input is appropriate for the demand placed on the unit. For example, cooling operation is requested and cold water (5° lower than room temperature) flows into the unit.

3. Select the correct temperature setpoint.

Note:

Select and enable zone sensor temperature settings to prevent freeze damage to unit.

General Information

Relay (Daughter) Board

The relay board is a new component on all models (except those with a unit-mounted, line-voltage fan speed switch) that replaces all the loose wires in the control box. It consolidates many control components onto one board, therefore making it easy to troubleshoot in the field. There is an LED on the board that indicates when power is supplied to the board. All connections are made to match up only with the applicable component to, thus prevent miswiring. Factory switches are pre-set and locked in place with lock-tight. The switch settings can be broken if field-modifications are needed.

However, switches must be properly set for the unit to operate safely and properly. See Figure 21 .

Figure 21. Relay board

UNT-SVX07B-EN

Manual Fan Mode Switch

The manual fan mode switch is available with a four-position switch (off-hi-med-lo) allows manual fan mode selection and is available unit- or wall-mounted. See Figure 22 .

83

Start-Up

Figure 22. Fan speed switch

The unit-mounted option operates on line voltage. The wall-mounted option is low-voltage and has three 24-volt relays using a factory-wired transformer and relays to control the fan motor.

Tracer ZN010 & ZN510

Tracer ZN010 is a stand-alone device that controls fan-coils and cabinet heaters. Tracer ZN510 can be stand-alone or use peer-to-peer communications.

The controller is easily accessible in the control end panel for service. The control end panel is on the end of the unit opposite the piping. See Figure 23 .

Figure 23. Tracer ZN010 board

Fan Mode Switch Operation

Off

Fan is turned off, two-position damper option spring-returns closed.

Hi, Med, Lo

Fan runs continuously at the selected speed. The two-position damper option opens to an adjustable mechanical stop position.

Tracer ZN010 & ZN510 Operation

Off

Fan is off; control valves and fresh air damper option close. Low air temperature detection option is still active.

84 UNT-SVX07B-EN

Start-Up

Auto (Fan Cycling)

Fan and fresh air damper cycle with control valve option to maintain setpoint temperature. In cooling mode, the fan cycles from off to medium and in heating mode it cycles from off to low.

When no heating or cooling is required, the fan is off and the fresh air damper option closes.

Low/Med/High (Continuous Fan)

Fan operates continuously while control valve option cycles to maintain setpoint temperature.

Fresh air damper option is open.

Tracer ZN520 Operation

Off

Fan is off; control valve options and fresh air damper options close. The low air temperature detection option is still active.

Auto

Fan speed control in the auto setting allows the modulating (3-wire floating point) or 2–position control valve option and three-speed fan to work cooperatively to meet precise capacity requirement, while minimizing fan speed (motor/energy/acoustics ) and valve position (pump energy, chilled water reset ). As the capacity requirement increases at low fan speed, the water valve opens. When the low fan speed capacity switch point is reached, the fan switches to medium speed and the water valve repositions to maintain an equivalent capacity. The reverse sequence takes place with a decrease in required capacity.

Low/Med/High

The fan runs continuously at the selected speed and the valve option will cycle to meet setpoint.

UNT-SVX07B-EN 85

Start-Up

Sequence of Operation: Tracer ZN010 and ZN510

Note:

This section applies only to units with a Tracer ZN010 or ZN510 controller.

Power-Up Sequence

When 24 Vac power is initially applied to the Tracer ZN010 or ZN510, the following sequence occurs:

1. All outputs are controlled off.

2. Tracer ZN010 and ZN510 reads all input values to detemine initial values.

3. The random start time (0-25 seconds) expires.

4. Normal operation begins.

Entering Water Temperature Sampling Function

Both Tracer ZN010 and ZN510 use an entering water temperature sampling function to test for the correct water temperature for the unit operating mode. For all applications not involving changeover, the water temperature does not affect unit operation.

The entering water temperature sampling function opens the main hydronic valve, waits no more than three minutes to allow the water temperature to stabilize, then measures the entering water temperature to see if the correct water temperature is available.

The entering water must be five degrees or more above the space temperature to allow hydronic heating and five degrees or more below the space temperature to allow hydronic cooling.

If the correct water temperature is available, the unit begins normal heating or cooling operation.

If the measured entering water temperature is too low or high, the controller closes the valve and waits 60 minutes before attempting to sample the entering water. Refer to Table 15 .

Table 15. Unit mode as related to water temperature

Unit Type

2-pipe changeover

EWT Sensor Required?

Yes

4-pipe changeover

2-pipe heating only

2-pipe cooling only

4-pipe heat/cool

Yes

No

No

No

Coil Water Temperature

COOLS if: Space temp - EWT ≥ 5°F

HEATS if: EWT - space temp ≥ 5°F

COOLS if: Space temp - EWT ≥ 5°F

HEATS if: EWT - space temp ≥ 5°F

Hot water assumed

Cold water assumed

Cold water assumed in main coil

Hot water assumed in aux. coil

Binary Inputs

BIP1: Low Temperature Detection Option

The factory hard wires the low temperature detection sensor to binary input #1 (BIP1) on the Tracer

ZN010 and ZN510. The sensor defaults normally closed (N.C.), and will trip off the unit on a low temperature diagnostic when detecting low temperature. In addition, the Tracer ZN010 and ZN510 control unit devices as listed below:

Fan: Off

Valves: Open

Electric heat: Off

Damper: Closed

Note:

See “Diagnostics,” p. 107 for more information.

86 UNT-SVX07B-EN

Start-Up

BIP2: Condensate Overflow Detection Option

The factory hard wires the condensate overflow sensor to binary input #2 (BIP2) on the Tracer

ZN010 and ZN510. The sensor defaults normally closed (N.C.), and will trip off the unit on a condensate overflow diagnostic if condensate reaches the trip point. In addition, the Tracer ZN010 and ZN510 control unit devices as listed below:

Fan: Off

Valves: Closed

Electric heat: Off

BIP3: Occupancy Sensor

Binary input #3 (BIP3) on Tracer ZN010 and ZN510 is available for field- wiring an occupancy sensor, such as a binary switch or a timeclock, to detect occupancy. The sensor can be either normally open or normally closed. Refer to Table 16 .

Table 16. Occupancy sensor state table

Sensor Type

Normally open

Normally open

Normally closed

Normally closed

Sensor Position

Open

Closed

Open

Closed

Unit Occupancy Mode

Occupied

Unoccupied

Unoccupied

Occupied

Binary Outputs

Refer to Table 17 for the Tracer ZN010 and ZN510’s six binary outputs.

Table 17. Binary outputs

Binary output

BOP1

BOP2

BOP3

BOP4

BOP5

BOP6

Description

Fan high speed

Fan medium speed

Fan low speed

Main valve

Auxiliary valve/electric heat

2-position fresh air damper

Notes:

1. In a four-pipe application, BOP4 is used for cooling and BOP5 is used for heating.

2. If no valves are ordered with the unit, the factory defaults for the Tracer ZN010 and ZN510 controller are:

BOP4 configured as normally closed

BOP5 configured as normally open

3. If the fresh air damper option is not ordered on the unit, BOP6 will be configured as none.

Pin

J1-1

J1-2

J1-4

J1-5

J1-6

J1-7

Both Tracer ZN010 and ZN510 accept a maximum of five analog inputs. Refer to Table 18, p. 88 .

UNT-SVX07B-EN 87

Start-Up

88

Table 18. Analog inputs

Analog Input

Zone

Set

Fan

Analog input 1 (AI1)

Analog input 2 (AI2)

Description

Space temperature

Local setpoint

Fan mode input

Entering water temperature

Discharge air temperature

Application

Space temperature detection

Thumbwheel setpoint

Zone sensor fan switch

Entering water temperature detection

Discharge air temperature detection

Notes:

1. 1.The zone sensor, entering water temperature sensor, and the discharge air temperature sensor are 10 K Ω thermistors.

Figure 28, p. 113 provides the resistance-temperature curve for these thermistors.

2. Zone sensor:

Wall-mounted sensors include a thermistor soldered to the sensor’s circuit board

Unit mounted sensors include a return air sensor in the unit’s return air stream.

3. Changeover units include an entering water temperature sensor.

Zone Sensors

The zone sensors available with the Tracer ZN010 and ZN510 provide up to three different inputs

1.

Space temperature measurement (10 K

Ω

thermistor)

2. Local setpoint

3. Fan mode switch

Wall-mounted zone sensors include a thermistor as a component of the internal printed circuit board. Unit mounted zone sensors use a sensor placed in the unit’s return air stream.

Each zone sensor is equipped with a thumbwheel for setpoint adjustment.

Fan Mode Switch

The zone sensor may be equipped with a fan mode switch. The fan mode switch offers selections of off, low, medium, high, or auto.

Supply Fan Operation

Refer to Table 19 for fan mode operation. Tracer ZN010 and ZN510 will operate in either continuous fan or fan cycling mode. The fan cycles when the fan mode switch is placed in auto. The fan runs continuous when placed in the high, medium, or low position. Use Rover, Trane’s installation and service tool, to change auto defaults.

Table 19. Fan mode operation

Heating Mode

Fan mode

Off

Low

Medium

High

Auto

Continuous

Cycling off/heat default

Occupied

Off

Low

Medium

High

Heat default

Cooling Mode

Unoccupied

Off

Off/high

(a)

Off/high

(a)

Off/high

(a)

Off/high

(a)

Off/high

(a)

Occupied

Off

Low

Medium

High

Cool default

Off/cool default

Unoccupied

Off

Off/high

(a)

Off/high

(a)

Off/high

(a)

Off/high

Off/high

(a)

(a)

Notes:

1. During the transition from off to any fan speed but high, Tracer ZN010 and ZN510 automatically starts the fan on high speed and runs for three seconds before transitioning to the selected speed (if it is other than high). This provides enough torque to start all fan motors from the off position.

2. When the heating output is controlled off, Tracer ZN010 and ZN510 automatically controls the fan on for an additional 30 seconds. This delay allows the fan to dissipate any residual heat from the heating source, such as electric heat.

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(a) Whenever two states are listed for the fan:

The first state (off) applies when there is not a call for heating or cooling.

The second state (varies) applies when there is a call for heating or cooling.

The heat default is factory configured for low fan speed, and the cool default is medium.

Table 20. Valid operating range and factory default setpoints

Setpoint/parameter

Unoccupied cooling setpoint

Occupied cooling setpoint

Occupied heating setpoint

Unoccupied heating setpoint

Cooling setpoint high limit

Cooling setpoint low limit

Heating setpoint high limit

Heating setpoint low limit

Power-up control wait

Default Setting

85°F

74°F

71°F

60°F

110°F

40°F

105°F

40°F

0 sec

Valid Operating Range

40°F to 115°F

40°F to 115°F

40°F to 115°F

40°F to 115°F

40°F to 115°F

40°F to 115°F

40°F to 115°F

40°F to 115°F

0 sec to 240 sec

Tracer ZN520 Sequence of Operation

The Tracer ZN520 operates the fan in the following modes:

1.

occupied

2. unoccupied

3. occupied standby

4. occupied bypass

5. Tracer Summit with supply fan control

Occupied

When the controller is in the occupied mode, the unit attempts to maintain the space temperature at the active occupied heating or cooling setpoint, based on the measured space temperature, the discharge air temperature, the active setpoint, and the proportional/integral control algorithm. The modulating control algorithm used when occupied or in occupied standby is described in the following sections. Additional information related to the handling of the controller setpoints can be found in the previous Setpoint operation section.

Unoccupied Mode

When the controller is in the unoccupied mode, the controller attempts to maintain the space temperature at the stored unoccupied heating or cooling setpoint, based on the measured space temperature, the active setpoint and the control algorithm, regardless of the presence of a hardwired or communicated setpoint. Similar to other configuration properties of the controller, the locally stored unoccupied setpoints can be modified using Rover™ service tool.

In unoccupied mode, a simplified zone control algorithm is run. During the cooling mode, when the space temperature is above the cool setpoint, the primary cooling capacity operates at 100%.

If more capacity is needed, the supplementary cooling capacity turns on (or opens to 100%). During the heating mode, when the space temperature is below the heat setpoint, the primary heating capacity turns on. All capacity is turned off when the space temperature is between the unoccupied cooling and heating setpoints. Note that primary heating or cooling capacity is defined by unit type and whether heating or cooling is enabled or disabled. For example, if the economizer is enabled and possible, it will be the primary cooling capacity. If hydronic heating is possible, it will be the primary heating capacity.

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Occupied Standby Mode

The controller can be placed into the occupied standby mode when a communicated occupancy request is combined with the local (hardwired) occupancy binary input signal. When the communicated occupancy request is unoccupied, the occupancy binary input (if present) does not affect the controller’s occupancy. When the communicated occupancy request is occupied, the controller uses the local occupancy binary input to switch between the occupied and occupied standby modes.

During occupied standby mode, the controller’s economizer damper position goes to the economizer standby minimum position. The economizer standby minimum position can be changed using Rover service tool.

In the occupied standby mode, the controller uses the occupied standby cooling and heating setpoints. Because the occupied standby setpoints typically cover a wider range than the occupied setpoints, the Tracer ZN520 controller reduces the demand for heating and cooling the space. Also, the outdoor air economizer damper uses the economizer standby minimum position to reduce the heating and cooling demands.

When no occupancy request is communicated, the occupancy binary input switches the controller’s operating mode between occupied and unoccupied. When no communicated occupancy request exists, the unit cannot switch to occupied standby mode.

Occupied Bypass Mode

The controller can be placed in occupied bypass mode by either communicating an occupancy request of Bypass to the controller or by using the timed override On button on the Trane zone sensor.

When the controller is in unoccupied mode, you can press the On button on the zone sensor to place the controller into occupied bypass mode for the duration of the bypass time (typically

120 minutes).

Occupancy Sources

There are four ways to control the controller’s occupancy:

• Communicated request (usually provided by the building automation system or peer device)

• By pressing the zone sensor’s timed override On button

• Occupancy binary input

• Default operation of the controller (occupied mode)

A communicated request from a building automation system or another peer controller can change the controller’s occupancy. However, if communication is lost, the controller reverts to the default operating mode (occupied) after 15 minutes (configurable, specified by the “receive heartbeat time”), if no local hardwired occupancy signal exists.

A communicated request can be provided to control the occupancy of the controller. Typically, the occupancy of the controller is determined by using time-of-day scheduling of the building automation system. The result of the time-of-day schedule can then be communicated to the unit controller.

Tracer Summit with Supply Fan Control

If the unit is communicating with Tracer Summit and the supply fan control programming point is configured for Tracer (the factory configures as local), Tracer Summit will control the fan regardless of the fan mode switch position.

When the fan mode switch is set to Off or when power is restored to the unit, all Tracer ZN520 lockouts (latching diagnostics) are manually reset. The last diagnostic to occur is retained until the unit power is disconnected. Refer to Trane publication, CNT-SVX04A-EN (

Tracer ZN.520 Unit

Controller: Installation, Operation and Programming Guide

) for specific instructions regarding the procedure for running the Tracer ZN520.

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Cooling Operation

The heating and cooling setpoint high and low limits are always applied to the occupied and occupied standby setpoints. During the cooling mode, the Tracer ZN520 controller attempts to maintain the space temperature at the active cooling setpoint. Based on the controller’s occupancy mode, the active cooling setpoint is one of the following:

• Occupied cooling setpoint

• Occupied standby cooling setpoint

• Unoccupied cooling setpoint

The controller uses the measured space temperature, the active cooling setpoint, and discharge air temperature along with the control algorithm to determine the requested cooling capacity of the unit (0%–100%). The outputs are controlled based on the unit configuration and the required cooling capacity. To maintain space temperature control, the Tracer ZN520 cooling outputs

(modulating hydronic valve, two-position hydronic valve, or outdoor air economizer damper) are controlled based on the cooling capacity output.

The cooling output is controlled based on the cooling capacity. At 0% capacity, all cooling capacities are off and the damper is at minimum position. Between 0% and 100% capacity, the cooling outputs are controlled according to modulating valve logic (modulating valves) or cycled on (2-position valves). As the load increases, modulating outputs open further and binary outputs are energized longer. At 100% capacity, the cooling valve or damper is fully open (modulating valves) or on continuously (and 2-position valves).

Unit diagnostics can affect fan operation, causing occupied and occupied standby fan operation to be defined as abnormal. Refer to the Troubleshooting section for more information about abnormal fan operation.

The Tracer ZN520 controller operates the supply fan continuously when the controller is in the occupied and occupied standby modes, for either heating or cooling. The controller only cycles the fan off with heating and cooling capacity in the unoccupied mode.

The economizer is used for cooling purposes whenever the outdoor temperature is below the economizer enable setpoint and there is a need for cooling. The economizer is used first to meet the space demand, and other forms of cooling are used if the economizer cannot meet the demand alone. See modulating outdoor air damper operation for additional information.

Cascade cooling control initiates a discharge air tempering function if the discharge air temperature falls below the discharge air temperature control low limit, all cooling capacity is at minimum, and the discharge control loop determines a need to raise the discharge air temperature.

The controller then provides heating capacity to raise the discharge air temperature to its low limit.

Discharge Air Tempering

The discharge air tempering function enables when cold outdoor air is brought in through the outdoor air damper, causing the discharge air to fall below the discharge air temperature control low limit. The controller exits the discharge air tempering function when heat capacity has been at 0% for five minutes.

Heating Operation

During heating mode, the Tracer ZN520 controller attempts to maintain the space temperature at the active heating setpoint. Based on the occupancy mode of the controller, the active heating setpoint is one of the following:

• Occupied heating

• Occupied standby heating

• Unoccupied heating

During dehumidification in the heating mode, the controller adjusts the heating setpoint up to the cooling setpoint. This reduces the relative humidity in the space with a minimum of energy usage.

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The controller uses the measured space temperature, the active heating setpoint, and discharge air temperature, along with the control algorithm, to determine the requested heating capacity of the unit (0%–100%). The outputs are controlled based on the unit configuration and the required heating capacity.

Unit diagnostics can affect the Tracer ZN520 controller operation, causing unit operation to be defined as abnormal. Refer to the Troubleshooting section for more information about abnormal unit operation.

The heating output is controlled based on the heating capacity. At 0% capacity, the heating output is off continuously. Between 0% and 100% capacity, the heating output is controlled according to modulating valve logic (modulating valves) or cycled on (two-position valves). As the load increases, modulating outputs open further and binary outputs are energized longer. At 100% capacity, the heating valve is fully open (modulating valves) or on continuously (two-position valves).

The Tracer ZN520 fan output(s) normally run continuously during the occupied and occupied standby modes, but cycle between high and off speeds with heating/cooling during the unoccupied mode. When in the occupied mode or occupied standby mode and the fan speed is set at the high, medium, or low position, the fan runs continuously at the selected speed. Refer to the

Troubleshooting section for more information on abnormal fan operation.

When the unit’s supply fan is set to auto, the controller’s configuration determines the fan speed when in the occupied mode or occupied standby mode. The fan runs continuously at the configured heating fan speed or cooling fan speed. For all fan speed selections except off, the fan cycles off during unoccupied mode.

The economizer outdoor air damper is never used as a source of heating. Instead, the economizer damper (when present) is only used for ventilation; therefore, the damper is at the occupied minimum position in the occupied mode. The damper control is primarily associated with occupied fan operation.

Fan Mode Operation

For multiple fan speed applications, the Tracer ZN520 controller offers additional fan configuration flexibility. Separate default fan speeds for heating and cooling modes can be configured. The fan runs continuously for requested speeds (off, high, medium, or low). When the fan mode switch is in the Auto position or a hardwired fan mode input does not exist, the fan operates at the default configured speed. See Table 21 for default fan configuration for heat and cool mode. During unoccupied mode, the fan cycles between high speed and off with heating and cooling fan modes.

If the requested speed is off, the fan always remains off.

Table 21. Fan configuration

Heating

Auto Fan Operation

Continuous

Cooling Continuous

Fan Speed Default

Off

Low

Medium

High

Off

Low

Medium

High

During dehumidification, when the fan is on Auto, the fan speed can switch depending on the error.

Fan speed increases as the space temperature rises above the active cooling setpoint.

Additional flexibility built into the controller allows you to enable or disable the local fan switch input. The fan mode request can be either hardwired or communicated to the controller. When both

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UNT-SVX07B-EN are present, the communicated request has priority over the hardwired input. See Table 22 ,

Table 23 , and Table 24 .

Table 22. Local fan switch enabled

Communicated Fan Speed Input Fan Switch (Local)

Off

Low

Medium

High

Auto

Low

Medium

High

Ignored

Ignored

Ignored

Ignored

Off

Auto

Low

Medium

High

Off

Auto (configured default, determined by heat/cool mode)

Fan Operation

Off

Low

Medium

High

Table 23. Fan operation in heating and cooling modes

Fan Mode

Off

Low

Medium

High

Auto

Occ.

Off

Low

Med

High

Default fan sp.

Heating

Unocc.

Off

Off/high

Off/high

Off/high

Off/high

Cooling

Occ. Unocc.

Off

Low

Med

High

Default fan sp.

Off

Off/high

Off/high

Off/high

Off/high

Table 24. Local fan switch disabled or not present

Communicated Fan Speed Input

Off

Low

Medium

High

Auto (or not present)

Fan Operation

Off

Low

Medium

High

Auto (fan runs at the default speed)

Continuous Fan Operation

During occupied and occupied standby modes, the fan normally is on. For multiple speed fan applications, the fan normally operates at the selected or default speed (off, high, medium, or low).

When fan mode is auto, the fan operates at the default fan speed.

During unoccupied mode, the controller controls the fan off. While unoccupied, the controller heats and cools to maintain the unoccupied heating and cooling setpoints. In unoccupied mode, the fan is controlled on high speed only with heating or cooling.

The unit fan is always off during occupied, occupied standby, and unoccupied modes when the unit is off due to a diagnostic or when the unit is in the off mode due to the local zone sensor module, a communicated request, or the default fan speed (off).

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If both a zone sensor module and communicated request exist, the communicated request has priority.

Fan Cycling Operation

Tracer ZN520 does not support fan cycling in occupied mode.

The fan cycles between high speed and off in the unoccupied mode only. The controller’s cascade control algorithm requires continuous fan operation in the occupied mode.

Fan Off Delay

When a heating output is controlled off, the Tracer ZN520 controller automatically holds the fan on for an additional 30 seconds. This 30-second delay gives the fan time to blow off any residual heat from the heating source, such as a steam coil. When the unit is heating, the fan off delay is normally applied to control the fan; otherwise, the fan off delay does not apply.

Fan Start on High Speed

On a transition from off to any other fan speed, the Tracer ZN520 controller automatically starts the fan on high speed and runs the fan at high speed for 0.5 seconds. This provides the ample torque required to start all fan motors from the off position.

Entering Water Temperature Sampling Function

Only units using the main hydronic coil for both heating and cooling (2-pipe changeover and 4-pipe changeover units) use the entering water temperature sampling function. Two-pipe changeover and 4-pipe changeover applications allow the main coil to be used for heating and for cooling; therefore, these applications require an entering water temperature sensor.

When three-way valves are ordered with a Tracer ZN520 control, the controller is factoryconfigured to disable the entering water temperature sampling function, and the entering water sensor is mounted in the proper location. Disabling entering water temperature sampling eliminates unnecessary water flow through the main coil when three-way valves are used.

The controller invokes entering water temperature sampling only when the measured entering water temperature is too cool to heat or too warm to cool. Entering water is cold enough to cool when it is five degrees below the measured space temperature. Entering water is warm enough to heat when it is five degrees above the measured space temperature.

When the controller invokes the entering water temperature sampling function, the unit opens the main hydronic valve for no more than three minutes before considering the measured entering water temperature. An initial stabilization period is allowed to flush the coil. This period is equal to 30 seconds plus 1/2 the valve stroke time. Once this temperature stabilization period has expired, the controller compares the entering water temperature against the effective space temperature

(either hardwired or communicated) to determine whether the entering water can be used for the desired heating or cooling. If the water temperature is not usable for the desired mode, the controller continues to compare the entering water temperature against the effective space temperature for a maximum of three minutes.

The controller automatically disables the entering water temperature sampling and closes the main hydronic valve when the measured entering water exceeds the high entering water temperature limit (110°F). When the entering water temperature is warmer than 110°F, the controller assumes the entering water temperature is hot because it is unlikely the coil would drift to a high temperature unless the actual loop temperature was very high.

If the entering water temperature is unusable — too cool to heat or too warm to cool — the controller closes the hydronic valve and waits 60 minutes before initializing another sampling. If the controller determines the entering water temperature is valid for heating or cooling, it resumes normal heating/cooling control and effectively disables entering water temperature sampling until it is required.

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Electric Heat Operation

The Tracer ZN520 controller supports one or two-stage electric heat operation for heating. To control the space temperature, electric heat is cycled to control the discharge air temperature. The rate of cycling is dependent upon the load in the space and the temperature of the incoming fresh air from the economizer (if any). Two-pipe changeover units with electric heat use the electric heat only when hot water is not available.

Manual Fresh Air Damper

Units with the manual fresh air damper option ship with the damper in the closed position, which is adjustable from zero to 100% in 25% increments. To adjust the position, first remove the air filter to expose the damper stop screw on the control panel end. Relocate the stop screw to the appropriate position. Then loosen the stop screw wingnut and adjust the linkage.

Economizer Damper Option

With a valid outdoor air temperature (either hardwired or communicated), Tracer ZN520 uses the modulating economizer damper as the highest priority source of cooling. Economizer operation is only possible through the use of a modulating damper.

Economizing is possible during the occupied, occupied standby, unoccupied, and occupied bypass modes.

The controller initiates the economizer function if the outdoor air temperature is cold enough to be used as free cooling capacity. If the outdoor air temperature is less than the economizer enable setpoint (absolute dry bulb), the controller modulates the outdoor air damper (between the active minimum damper position and 100%) to control the amount of outdoor air cooling capacity. When the outdoor air temperature rises 5°F above the economizer enable point, the controller disables economizing and moves the outdoor air damper back to its predetermined minimum position based on the current occupancy mode or communicated minimum damper position.

Table 25. Relationship between outdoor temperature sensors and damper position

Outdoor Air Temp.

Modulating Outdoor Air Damper

None or invalid

Occupied or

Occupied Bypass

Open to occupied minimum position

Occupied Standby

Open to occupied standby minimum position

Failed Open to occupied minimum position

Present and economizing feasible

Economizing minimum postion to 100%

Present & economizing not feasible

Open to occupied minimum position

Open to occuied standby minimum position

Economizing between occupied standby minimum position to 100%

Open to occupied standby minimum position

Unoccupied

Closed

Closed

Open & economizing when unit is operating, closed

Closed

Dehumidification

Dehumidification is possible when mechanical cooling is available, the heating capacity is located in the reheat position, and the space relative humidity setpoint is valid.The controller starts dehumidifying the space when the space humidity exceeds the humidity setpoint.

The controller continues to dehumidify until the sensed humidity falls below the setpoint minus the relative humidity offset.The controller uses the cooling and reheat capacities simultaneously to dehumidify the space. While dehumidifying, the discharge air temperature is controlled to maintain the space temperature at the current setpoint.

A typical scenario involves high humidity and high temperature load of the space.The controller sets the cooling capacity to 100% and uses the reheat capacity to warm the discharge air to maintain space temperature control. Dehumidification may be disabled via Tracer or configuration.

Note:

If the unit is in the unoccupied mode, the dehumidification routine will not operate.

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Data Sharing

Because this controller utilizes LonWorks™ technology, the controller can send or receive data

(setpoint, heat/cool mode, fan request, space temperature, etc.) to and from other controllers on the communication link, with or without the existence of a building automation system. This applies to applications where multiple unit controllers share a single space temperature sensor (for rooms with multiple units but only one zone sensor) for both standalone (with communication wiring between units) and building automation system applications. For this application you will need to use the Rover service tool. For more information on setup, refer to the Trane publication

EMTX-SVX01G-EN, or the most recent version.

Binary Inputs

The Tracer ZN520 controller has four available binary inputs (see Table 26 ). Normally, these inputs are factory-configured for the following functions:

• Binary input 1: Low temperature detection (freezestat)

• Binary input 2: Condensate overflow

• Binary input 3: Occupancy/ Generic

• Binary input 4: Fan status

Note:

The generic binary input can be used with a Tracer Summit® building automation system only.

Each binary input default configuration (including normally open/closed) is set at the factory.

However, you can configure each of the four binary inputs as normally open or normally closed.

The controller will be set properly for each factory-supplied binary input end-device. When no device is connected to the input, configure the controller’s input as not used.

Table 26. Binary input configurations

Binary Input

BI 1

BI 2

BI 3

BI 3

Description

Low temperature detection

(a)

Condensate overflow

(a)

Occupancy

Generic binary input

Fan status

(a)

Configuration

Controller Operation

Contact Closed Contact Open

Normally closed

Normally closed

Normally open

Normally open

Normal

Normal

Unoccupied

Normal

(c)

Diagnostic

(b)

Diagnostic

Occupied

Normal

(c)

(b)

Normally open Normal Diagnostic

(d)

BI 4

Note:

The occupancy binary input is for standalone unit controllers as an occupied/unoccupied input. However, when the controller receives a communicated occupied/unoccupied request, the communicated request has priority over the hardwired input.

(a) During low temperature, condensate overflow, and fan status diagnostics, the Tracer ZN520 control disables all normal unit operation of the fan, valves, and damper.

(b) Table 27, p. 97 shows the controller’s response to low temperature detection, condensate overflow, and fan status diagnostics.

(c) The generic binary input does not affect unit operation. A building automation system reads this input as a generic binary input.

(d) If the fan mode input is in the off position or the controller is in the unoccupied mode with the fan off, the fan status input will be open. A diagnostic will not be generated when the controller commands the fan off. A diagnostic will only be generated if the fan status input does not close after one minute from energizing a fan output or any time the input is open for one minute. The controller waits up to one minute after energizing a fan output to allow the differential pressure to build up across the fan.

Binary Outputs

Binary outputs are configured to support the following:

• Three fan stages (when one or two fan stages are present, medium fan speed can be configured as exhaust fan)

• One hydronic cooling stage

• One hydronic heating stage (dehumidification requires this to be in the reheat position)

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• One DX cooling stage

• One or two-stage electric heat (dehumidification requires this to be in the reheat position)

• Face and bypass damper

• Modulating outdoor air damper

• One baseboard heat stage

For more information, see Table 27 .

Table 27. Binary output configuration

Binary Output Configuration

J1-1

J1-2

J1-3

J1-4

J1-5

J1-6

J1-9

J1-10

Fan high

Fan medium

Fan low

(Key)

Cool valve—open, or 2-position valve

(a)

Cool valve—close Note 1

Heat valve—open, or 2 position valve, or 1st electric heat stage

(a)

Heat valve—close or 2nd Electric heat stage

(a)

J1-11

J1-12

TB4-1

TB4-2

Fresh air damper—open

Fresh air damper—close

Generic/baseboard heat output

24 Vac

(a) For Tracer ZN520 units configured and applied as 2-pipe hydronic heat/cool changeover, terminals J1-5 and J1-6 are used to control the primary valve for both heating and cooling. For Tracer ZN520 units configured and applied as 2-pipe hydronic heat/cool changeover with electric heat, terminals J1-5 and J1-6 are used to control the primary valve (for both cooling and heating), and terminals J1-9 and J1-10 are used only for the electric heat stage. For those 2-pipe changeover units, electric heat will not be energized while the hydronic supply is hot (5° or more above the space temperature).

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Table 28. Analog inputs

Description

Zone

Ground

Set

Fan

Ground

Analog input 1

Analog input 2

Analog input 3

Analog input 4

Ground

Terminals

TB3-1

TB3-2

TB3-3

B3-4

TB3-6

J3-1

J3-2

J3-3

J3-4

J3-5

J3-6

J3-7

J3-8

J3-9

Function Range

Space temperature input

Analog ground

Setpoint input

Fan switch input

5°F to 122°F (-15°C to 50°C)

NA

40°F to 115°F (4.4°C to 46.1°C)

4821 to 4919 W (off)

2297 to 2342 W (auto)

10593 to 10807 W (low)

13177 to 13443 W (medium)

15137 to 16463 W (high)

Analog ground

Entering water temperature

Analog ground

Discharge air temperature

Analog ground

Fresh air temp/generic temp

Analog ground

Universal input

NA

-40°F to 212°F (-40°C to 100°C)

NA

-40°F to 212°F (-40°C to 100°C)

NA

-40°F to 212°F (-40°C to 100°C)

NA

0% to 100%

Generic 4–20mA

Humidity

0% to 100%

0 to 2000 ppm

CO

2

Analog ground NA

Analog ground NA

Notes:

1. The zone sensor, entering water temperature sensor, discharge air sensor, and the outside air temperature sensor are

10K Ω thermistors.

2. Zone sensor: Wall-mounted sensors include a thermistor soldered to the sensor’s circuit board. Unit mounted sensors include a return air sensor in the units return air stream.

3. Changeover units include an entering water temperature sensor.

Zone Sensor

The Tracer ZN520 controller accepts the following zone sensor module inputs:

• Space temperature measurement (10k

Ω

thermistor)

• Local setpoint (either internal or external on the zone sensor module)

• Fan switch

• Timed override (On) and Cancel timed override

• Communication jack

Space Temperature Measurement

Trane zone sensors use a 10k

Ω

thermistor to measure the space temperature. Typically, zone sensors are wall-mounted in the room and include a space temperature thermistor. As an option, the zone sensor can be unit-mounted with a separate space temperature thermistor located in the unit’s return air stream. If both a hardwired and communicated space temperature value exist, the controller ignores the hardwired space temperature input and uses the communicated value.

External Setpoint Adjustment

Zone sensors with an external setpoint adjustment (1k

Ω

) provide the Tracer ZN520 controller with a local setpoint (50°F to 85°F or 10°C to 29.4°C). The external setpoint is exposed on the zone sensor’s front cover.

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When the hardwired setpoint adjustment is used to determine the setpoints, all unit setpoints are calculated based on the hardwired setpoint value, the configured setpoints, and the active mode of the controller. The hardwired setpoint is used with the controller’s occupancy mode (occupied, occupied standby, or unoccupied), the heating or cooling mode, the temperature deadband values, and the heating and cooling setpoints (high and low limits) to determine the controller’s active setpoint.

When a building automation system or other controller communicates a setpoint to the controller, the controller ignores the hardwired setpoint input and uses the communicated value. The exception is the unoccupied mode, when the controller always uses the stored default unoccupied setpoints. After the controller completes all setpoint calculations, based on the requested setpoint, the occupancy mode, the heating and cooling mode, and other factors, the calculated setpoint is validated against the following setpoint limits:

• Heating setpoint high limit

• Heating setpoint low limit

• Cooling setpoint high limit

• Cooling setpoint low limit

These setpoint limits only apply to the occupied and occupied standby heating and cooling setpoints. These setpoint limits do not apply to the unoccupied heating and cooling setpoints stored in the controller’s configuration.

When the controller is in unoccupied mode, it always uses the stored unoccupied heating and cooling setpoints.The unit can also be configured to enable or disable the local (hardwired) setpoint. This parameter provides additional flexibility to allow you to apply communicated, hardwired, or default setpoints without making physical changes to the unit.

Similar to hardwired setpoints, the effective setpoint value for a communicated setpoint is determined based on the stored default setpoints (which determines the occupied and occupied standby temperature deadbands) and the controller’s occupancy mode.

Fan Switch

The zone sensor fan switch provides the controller with an occupied (and occupied standby) fan request signal (Off, Low, Medium, High, Auto). If the fan control request is communicated to the controller, the controller ignores the hardwired fan switch input and uses the communicated value.

The zone sensor fan switch input can be enabled or disabled through configuration using the Rover service tool. If the zone sensor switch is disabled, the controller resorts to its stored configuration default fan speeds for heating and cooling, unless the controller receives a communicated fan input.

When the fan switch is in the off position, the controller does not control any unit capacity. The unit remains powered and all outputs drive to the closed position. Upon a loss of signal on the fan speed input, the controller reports a diagnostic and reverts to using the default fan speed.

On/Cancel Buttons

Momentarily pressing the on button during unoccupied mode places the controller in occupied bypass mode for 120 minutes. You can adjust the number of minutes in the unit controller configuration using Rover service tool. The controller remains in occupied bypass mode until the override time expires or until you press the Cancel button.

Communication Jack

Use the RJ-11 communication as the connection point from Rover™ service tool to the communication link—when the communication jack is wired to the communication link at the controller. By accessing the communication jack via Rover™, you can access any controller on the link.

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Start-Up

Communications

Tracer ZN520 controller communicates via Trane’s LonTalk protocol. Typically, a communication link is applied between unit controllers and a building automation system. Communication also is possible via Rover, Trane’s service tool. Peer-to-peer communication across controllers is possible even when a building automation system is not present. You do not need to observe polarity for

LonTalk communication links.

The controller provides six 0.25-inch quick-connect terminals for the LonTalk communication link connections, as follows:

• Two terminals for communication to the board

• Two terminals for communication from the board to the next unit (daisy chain)

• Two terminals for a connection from the zone sensor back to the controller

Table 29. Zone sensor wiring connections

4

5

2

3

6

TB1

1

Description

Space temperature

Common

Setpoint

Fan mode

Communications

Communications

100 UNT-SVX07B-EN

Maintenance

Maintenance Procedures

Perform the following maintenance procedures to ensure proper unit operation.

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WARNING

Live Electrical Components!

During installation, testing, servicing, and troubleshooting this equipment, it may be necessary to work with live electrical components. Have a qualified licensed electrician or other individual who is properly trained in handling live electrical components perform these tasks. Failure to follow all electrical components could result in death or serious injury.



WARNING

Hazardous Voltage w/Capacitors!

Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors. Verify with an appropriate voltmeter that all capacitors have discharged. Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury.

Air Filters

Change or clean air filters at least twice a year. Filters require more frequent care under high load or dirty air conditions since a clogged filter reduces airflow. Table 1, p. 14 lists filter size and quantity by unit size. Throwaway and pleated media filters are available for all units. Follow the instructions below to replace the disposable filters.

All Models Except Vertical Cabinets

Remove the front panel of the vertical recessed unit and open the bottom panel door of the horizontal cabinet and horizontal recessed unit to access the filter. The front panel of the vertical cabinet unit does not require removal to change the filter.

Note:

Vertical recessed, horizontal cabinet, and horizontal recessed units with a bottom return have filter guides to secure the filter in position. Also, if these unit types have a fresh air opening, they require an additional filter for the fresh air opening.

NOTICE

Replace All Panels and Filters Properly!

All unit panels and filters must be in place prior to unit startup. Failure to have panels and filters in place could result in equipment damage.

Inspecting and Cleaning Drain Pans

Clean the fan-coil unit’s main and auxiliary drain pans to ensure the unit drains condensate properly.

Check the condensate drain pan and drain line to assure the condensate drains properly at least every six months or as dictated by operating experience.

If evidence of standing water or condensate overflow exists, immediately identify and remedy the cause.

Clean the drain pans of any moisture or debris.

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Maintenance

Auxiliary Drain Pan

1.

To remove the auxiliary drain pan, loosen the hose clamp (installer supplied) around the drain connection collar and disconnect the drain line.

2. Remove the overflow drain line to the auxiliary drain pan if it was installed.

3. Remove the condensate overflow switch option from the auxiliary drain pan.

4. Slide the pan horizontally towards the end of the large groove of the mounting slots in the chassis end panel and remove pan from unit (see Figure 24 ).

Figure 24. Insert the auxiliary drain pan tabs into these slots in the fan-coil’s chassis end panel

(horizontal unit shown).

Aux. Drain Pan Attaches to These Slots

Main Drain Pan

See Figure 25 to replace main drain correctly.

Figure 25. When replacing the fan-coil’s main drain pan, install it correctly under the z-bar.

Co i l

M ai n Dr ai n

Z-B a r

Side

Vertical Units.

To remove the main drain pan on vertical fan-coil units, disconnect the clips holding the pan to the fanboard. Disconnect the main and overflow drain hoses and slide pan forward to remove (see Figure 26, p. 103 ).

102 UNT-SVX07B-EN

Maintenance

Figure 26. To remove the main drain pan on vertical fan-coil units, disconnect the clips holding the pan to the fanboard.

Clips Hold Drain Pan in Place

Horizontal Units.

To remove the main drain pan on a horizontal fan-coil unit, peel the insulation from the edges of the pan’s underside to access the mounting screws. Remove the screws and lower the end of the drain pan closest to the control box. Remove the drain spout by pulling it from the hole in the chassis end panel (see Figure 27 ).

Figure 27. To remove the main drain pan on horizontal fan-coil units, peel the insulation from the edges of the pan’s underside to access the mounting screws.

Mounting Screw

UNT-SVX07B-EN

Note:

Do not operate the fan-coil unit without the main and auxiliary drain pans in place to prevent condensate leakage.

Coil Maintenance

Keep coils clean to maintain maximum performance. For operation at its highest efficiency, clean the coil often during periods of high demand or when dirty conditions prevail. Clean the coil a minimum of once a year to prevent dirt buildup in the coil fins, where it may not be visible.

Remove large debris from the coils and straighten fins before cleaning. Remove filters before cleaning.

Clean the coil fins using steam with detergent, hot water spray and detergent, or a commercially available chemical coil cleaner. Be sure to rinse coils thoroughly after cleaning.

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WARNING

Hazardous Chemicals!

Coil cleaning agents can be either acidic or highly alkaline. Handle chemical carefully. Proper handling should include goggles or face shield, chemical resistant gloves, boots, apron or suit as required. For personal safety refer to the cleaning agent manufacturer’s Materials Safety Data

Sheet and follow all recommended safe handling practices. Failure to follow all safety instructions could result in death or serious injury.

103

Maintenance

104

Inspecting and Cleaning Coils

Coils become externally fouled as a result of normal operation. Dirt on the coil surface reduces it’s ability to transfer heat that can result in comfort problems, increased airflow resistance and thus increased operating energy costs. If the coil surface dirt becomes wet, which commonly occurs with cooling coils, microbial growth (mold) may result, causing unpleasant odors and serious health-related indoor air quality problems.

Inspect coils at least every six months or more frequently as dictated by operating experience.

Cleaning frequently is dependent upon system operating hours, filter maintenance, and efficiency and dirt load. Follow the suggested methods in the following paragraphs.

Steam and Hydronic Coil Cleaning Procedure

1.

Disconnect all electrical power to the unit.

2. Don the appropriate personal protective equipment (PPE).

3. Access both sides of the coil.

4. Use a soft brush to remove loose debris from both sides of the coil.

5. Use a steam cleaning machine, starting from the top of the coil and working downward. Clean the leaving air side of the coil first, then the entering air side. Use a block-off to prevent steam from blowing through the coil and into a dry section of the unit.

6. Repeat step five as necessary. Confirm that the drain line is open following completion of the cleaning process.

7.

Allow the unit to dry thoroughly before putting the system back into service.

8. Straighten any coil fins that may be damaged with a fin rake.

9. Replace all panels and parts and restore electrical power to the unit.

Winterizing the Coil

Make provisions to drain coils that are not in use, especially when subjected to freezing temperatures.

To drain the coil, blow the coil out with compressed air. Next, fill and drain the tubes with fullstrength ethylene glycol several times. Drain the coil as completely as possible.

NOTICE

Coil Freeze-up Damage!

Failure to properly drain and vent coils when not in use during freezing temperatures may result in coil freeze-up damage.

Fan Board Assembly Removal

Follow the procedure below when replacing the coil or making repairs to the fan or motor.

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WARNING

Hazardous Voltage w/Capacitors!

Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors. Verify with an appropriate voltmeter that all capacitors have discharged. Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury.

Vertical Units.

UNT-SVX07B-EN

Maintenance

1.

Remove the front panel of cabinet and recessed units.

2. Pull the main and overflow drain hoses of the main drain pan into the inside of the fan-coil chassis end panel.

3. Remove the two fanboard mounting screws.

4. Slide the fanboard out horizontally to remove.

Horizontal Units.

1.

Open the bottom panel of cabinet and recessed models.

2. Remove the main drain pan following the instructions given under the drain pan section above for horizontal fan-coil units.

3. While supporting the fanboard in place, remove the two fanboard mounting screws which secure the fanboard to the unit.

NOTICE

Heavy Object!

Support the fanboard when removing it from the unit. Failure to properly support fanboard may result in minor to moderate personal injury.

Replacing the Motor

The capacitor for all unit motors can be replaced should it fail. Contact the local Trane service department to replace the motor capacitor in the event it fails. However, the motor itself cannot be repaired or rewound. If the motor fails, record the model number from the unit nameplate and present to the local Trane Service Parts Center to purchase a replacement. The motor bearings are permanently lubricated and do not require any further oiling.

After removing the fanboard assembly from the unit, disconnect the fan wheel/wheels from the motor shaft by loosening the Allen head setscrew on the fan wheel hub collar. Next, remove the mounting bolts holding the fan motor plate to the mounting bracket of the fanboard. Then remove the motor by sliding the fan shaft from the fan wheel hub.

During re-assembly, make certain the fan wheel(s) is/are properly centered in the fan housing to prevent the fan wheel from contacting the housing on either side. After the unit has been reassembled, verify that no unusual noise or vibration is present at startup.

Control Device Replacement

To order control components such as relays, contactors, transformers, low temperature detection devices, condensate overflow detection devices, differential pressure switches, sensors, control valves and actuators, contact the local Trane Service Parts Center. To order, the Trane parts center will need the unit model number (which can be found on the unit nameplate), the serial number, and the part name or ID.

Periodic Maintenance Checklists

Monthly Checklist

The following check list provides the recommended maintenance schedule to keep the unit running efficiently.

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WARNING

Live Electrical Components!

During installation, testing, servicing, and troubleshooting this equipment, it may be necessary to work with live electrical components. Have a qualified licensed electrician or other individual who is properly trained in handling live electrical components perform these tasks. Failure to follow all electrical components could result in death or serious injury.

UNT-SVX07B-EN 105

Maintenance



WARNING

Hazardous Voltage w/Capacitors!

Disconnect all electric power, including remote disconnects and discharge all motor start/run capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power cannot be inadvertently energized. For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors. Verify with an appropriate voltmeter that all capacitors have discharged. Failure to disconnect power and discharge capacitors before servicing could result in death or serious injury.

Monthly Maintenance

1.

Inspect unit air filters. Clean or replace if airflow is blocked or if filters are dirty.

2. Check the main and auxiliary drain pans on fan-coil units to be sure the pans are clean and do not impede the condensate flow through the drain line.

Annual Maintenance

Check and tighten all set screws, bolts, locking collars and sheaves.

1.

Inspect the unit cabinetry for chips or corrosion. Clean or repair to provide unit protection.

2. Inspect the fan wheel and housing for damage. Rotate the fan wheel manually to be sure movement is not blocked by obstructions.

3. Inspect the coil fins for excessive dirt or damage. Remove dirt and straighten fins.

4. Clean and tighten all electrical connections.

5. Inspect the strainer option for debris trapped in the filter screen.

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Diagnostics

Table 30. Tracer ZN520 diagnostics

Diagnostic Fan

Condensate overflow

Low temperature detection

Low air flow - fan failure

Space temperature failure

Entering water temp failure On

Discharge air temp low limit Off

Discharge air temp failure

Fresh air temp failure

Off

On

Off

Off

Off

Off

Relative humidity failure

Generic 4–20mA failure

CO

2

Input failure

Maintenance required

Local fan mode failure

Local setpoint failure

Invalid unit configuration

Normal—power up

On

On

Off

On

On

On

On

On

Other Outputs

(a)

Valves Closed, Fresh air damper Closed, Electric heat Off, Baseboard heat Off

Valves Open, Fresh air damper Closed, Electric heat Off, Baseboard heat Off

Valves Closed, Fresh air damper Closed, Electric heat Off, Baseboard heat Off

Valves Closed, Fresh air damper Closed, Electric heat Off, Baseboard heat Off

Valves Enabled

(b)

, Fresh air damper Enabled

(b)

, Electric heat Enabled

(b)

, Baseboard heat Off

Valves Open, Fresh air damper Closed, Electric heat Off, Baseboard heat Off

Valves Closed, Fresh air damper Closed, Electric heat Off, Baseboard heat Off

Valves Enabled, Fresh air damper Minimum position

(c)

, Electric heat Enabled, Baseboard heat Enabled

Valves Enabled, Fresh air damper Enabled, Electric heat Enabled, Baseboard heat Enabled

Valves Enabled, Fresh air damper Enabled, Electric heat Enabled, Baseboard heat Enabled

Valves Enabled, Fresh air damper Enabled, Electric heat Enabled, Baseboard heat Enabled

Valves Enabled, Fresh air damper Enabled, Electric heat Enabled, Baseboard heat Enabled

Valves Enabled, Fresh air damper Enabled, Electric heat Enabled, Baseboard heat Enabled

Valves Enabled, Fresh air damper Enabled, Electric heat Enabled, Baseboard heat Enabled

Valves Disabled, Fresh air damper Disabled, Electric heat Disabled, Baseboard heat Disabled

Valves Enabled, Fresh air damper Enabled, Electric heat Enabled

(a) The generic binary output (TB4-1, TB4-2) state is unaffected by all unit diagnostics.

(b) When the entering water temperature is required but not present, the Tracer ZN520 controller generates a diagnostic to indicate the sensor loss condition.

The controller automatically clears the diagnostic once a valid entering water temperature value is present (non-latching diagnostic). When the entering water temperature sensor fails, the controller prohibits all hydronic cooling operation, but allows the delivery of heat when heating is required. In the

Cool mode, all cooling is locked-out, but normal fan and outdoor air damper operation is permitted.

(c) When the outdoor air temperature sensor has failed or is not present, the Tracer ZN520 controller generates a diagnostic to indicate the sensor loss condition. The controller automatically clears the diagnostic once a valid outdoor air temperature value is present (non-latching diagnostic). When the outdoor air temperature sensor fails or is not present, the controller prohibits economizer operation.

Translating Multiple Diagnostics

The controller senses and records each diagnostic independently of other diagnostics. It is possible to have multiple diagnostics present simultaneously. The diagnostics are reported in the order they occur.

Possible diagnostics include:

• Low temperature detection

• Condensate overflow

• Low air flow—fan status

• Discharge air temp limit

• Space temperature failure

1

• Entering water temp failure

1

• Discharge air temp failure

1

• Outdoor air temp failure

1

• Local setpoint failure

1

• Local fan mode failure

1

• CO

2

sensor failure

1

• Generic AIP failure

1

• Humidity input failure

1

• Defrosting compressor lockout

1

• Maintenance required

• Invalid unit configuration

1

Non-latching diagnostics automatically reset when the input is present and valid.

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Diagnostics

• Generic temperature failure

• Discharge air low limit

Resetting Diagnostics

There are a number of ways in which diagnostics are reset:

1.

Automatic reset by the controller

2. By initiating a manual output test at the controller

3. By cycling power to the controller

4. Through Rover™, Trane’s service tool

5. Tracer ZN520: by using any other communicating device ab le to access the controller’s diagnostic reset input.

6. Tracer ZN520: by cycling the fan switch from Off to any speed setting.

Automatic Reset by the Controller

The controller includes an automatic diagnostic reset function that attempts to automatically restore the unit when a low temperature diagnostic occurs.

Note:

The controller implements the automatic diagnostic reset function only once every

24 hours. For the controller to increment the 24 hour timer, you must maintain power to the controller. Cycling power resets all timers and counters.

After the controller detects the first special diagnostic, the unit waits 30 minutes before invoking the automatic diagnostic reset function. The automatic diagnostic reset function clears the special diagnostic and attempts to restore the controller to normal operation. The controller resumes normal operation until another diagnostic occurs.

Note:

The automatic diagnostic reset function does not operate during the manual output test sequence.

If a special diagnostic occurs within 24 hours after an automatic diagnostic reset, the controller must be manually reset. Other possible methods of resetting diagnostics are described in the sections that follow.

Manual Output Test

To verify proper end device operation, press the controller’s Test button. This exercise will verify all outputs in a predefined sequence, the first of which will attempt to reset the controller diagnostics if any are present.

Cycling Power to the Controller

After removing and reapplying the 24 Vac power from the board, the unit cycles through a powerup sequence. By default, the controller attempts to reset all diagnostics present at power-up.

Diagnostics present at power-up and those that occur after power-up are handled according to

Table 31, p. 109 .

108 UNT-SVX07B-EN

UNT-SVX07B-EN

Diagnostics

Table 31. Tracer ZN510 controller diagnostics

Diagnostic

Auxiliary temp. failure

Condensate overflow detection

Entering water temp. failure

Fan mode failure

Invalid unit configuration failure

Low temp. detection

Maintenance required

Setpoint

Zone temp. failure

Latching?

Yes

Yes

Yes

No

No

No

Yes

No

No

Fan

Enabled

Off

Enabled

Enabled

Disabled

Off

Enabled

Enabled

Off

Valves

No action

Closed

Enabled

Enabled

Disabled

Open

No action

No action

Closed

Elec Heat

No action

Off

Enabled

Enabled

Disabled

Off

No action

No action

Off

Damper

No action

Closed

Enabled

Enabled

Disabled

Closed

No action

No action

Closed

Notes:

1. Priority Level: Diagnostics are listed in order from highest to lowest priority. The controller senses and records each diagnostic independently of other diagnostics. It is possible to have multiple diagnostics present simultaneously. The diagnostics affect unit operation according to priority level.

2. Latching: A latching diagnostic requires a manual reset of the controller; while a non-latching diagnostic automatically resets when the input is present and valid.

3. Enabled: End device is allowed to run if there is a call for it to run.

4. Disabled: End device is not allowed to run even if there is a call for it to run.

5. No Action: The diagnostic has no affect on the end device.

Using Trane’s Service Tool, Rover™

Rover™, Trane’s service tool, can reset diagnostics present in the controller and troubleshoot the unit. For more information, refer to the Trane publication EMTX-SVX01G-EN (

Rover Service Tool:

Installation, Operation, and Programming Guide

).

Diagnostic Reset

Any device that can communicate the network variable nviRequest (enumeration “clear_alarm”) can reset diagnostics in the Tracer ZN520 controller.The controller also attempts to reset diagnostics whenever power is cycled.

Cycling the Fan Switch

Cycle the fan speed switch from Off to any speed and the controller resets all diagnostics.

Diagnostics may recur immediately if the problem still exists.

109

Diagnostics

Table 32. Fan outputs do not energize

Probable Cause

Random start

Power-up control wait

Cycling fan operation

Unoccupied operation

Fan mode off

Requested mode: off

Diagnostic present

No power to the controller

Manual output test

Unit wiring

Explanation

After power-up, the controller always observes a random start that varies observed between 0 and 25 seconds. The controller remains off until the random start time expires.

When power-up control wait is enabled (non-zero time), the controller remains off until one of two conditions occurs:

1. The controller exits power-up control wait once it receives communicated information.

2. The controller exits power-up control wait once the power-up control wait time expires.

When the fan mode switch is in the auto postion, the unit fan cycles off when there is no call for heating or cooling.

The heating/cooling sources cycle on or off periodically with the unit fan to match the capacity according to pulsewidth-modulation (PWM) logic.

The fan cycles with capacity when the unit is in unoccupied mode. This occurs even if the unit is in continuous fan operation. While unoccupied, the fan cycles on or off with heating/cooling to provide varying amounts of heating or cooling to the space to match the to pulse-width-modulation (PWM) logic.

When using the local fan mode switch to determine the fan operation, the off position controls the unit fan to off.

It is possible to communicate the operating mode (such as off, heat, and cool) to the controller. When “off” is communicated to the controller, the unit controls the fan to off. The unit is not capable of heating or cooling when the controller is in this mode.

A specific list of diagnostics effects fan operation. For more information, see “Diagnostics,” p. 107 .

If the controller does not have power, the unit fan will not operate. For the controller to operate normally, it must have an input voltage of 24 Vac. When the green LED is off continuously, the controller does not have sufficient power or the controller has failed.

The controller includes a manual output test sequence to verify binary output operation and the associated wiring.

However, based on the current step in the test sequence, the unit fan may not be powered on. Refer to “Manual Output

Test,” p. 108 .

The wiring between the controller outputs and the fan relays and contacts must be present and correct for normal fan operation. Refer to the typical unit wiring diagrams (see “Wiring Diagrams,” p. 126 ).

Table 33. Valves stay closed

Probable Cause

Normal operation

Requested mode: off

Valve override

Manual output test

Diagnostic present

Sampling logic

Unit configuration

No power to the controller

Unit wiring

Explanation

The controller opens and closes the valves to meet the unit capacity requirements.

It is possible to communicate the operating mode (such as off, heat, and cool) to the controller. When off is communicated to the controller, the unit controls the fan to off. The unit is not capable of heating or cooling when the controller is in this mode.

The controller can communicate a valve override request. This request affects the valve operation.

The controller includes a manual output test sequence to verify analog and binary output operation and the associated wiring. However, based on the current step in the test sequence, the valves may not be open. Refer to “Manual Output

Test,” p. 108 .

A specific list of diagnostics affects valve operation. For more information, see “Diagnostics,” p. 107 .

The controller includes entering water temperature sampling logic that automatically invokes during 2-pipe or 4-pipe changeover. It determines when the entering water temperature is either too cool or too hot for the desired heating or cooling mode. Refer to “Entering Water Temperature Sampling Function,” p. 86 .

The controller must be properly configured based on the actual installed end devices and application. When the unit configuration does not match the actual end device, the valves may not work correctly.

If the controller does not have power, the valves do not operate. For the controller controller to operate normally, it must have an input voltage of 24 Vac. When the green LED is off continuously, the controller does not have sufficient power,or the controller has failed.

The wiring between the controller outputs and the valve(s) must be present and correct for normal valve operation.

Refer to the typical unit wiring diagrams (see “Wiring Diagrams,” p. 126 ).

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Diagnostics

Table 34. Valves stay open

Probable Cause

Normal operation

Valve override

Manual output test

Diagnostic present

Sampling logic

Unit configuration

Unit wiring

Explanation

The controller opens and closes the valves to meet the unit capacity requirements.

The controller can communicate a valve override request to affect the valve operation.

The controller includes a manual output test sequence that verifies analog and binary output operation and the associated wiring. However, based on the current step in the test sequence, the valves may be open. Refer to “Manual

Output Test,” p. 108 .

A specific list of diagnostics affects valve operation. For more information, see “Diagnostics,” p. 107 .

The controller includes entering water temperature sampling logic that automatically invokes during 2-pipe or 4-pipe changeover to determine if the entering water temperature is correct for the unit operating mode. Refer to “Entering

Water Temperature Sampling Function,” p. 86 .

The controller must be properly configured based on the actual installed end devices and application. When the unit configuration does not match the actual end device, the valves may not work correctly.

The wiring between the controller outputs and the valve(s) must be present and correct for normal valve operation.

Refer to the typical unit wiring diagrams (see “Wiring Diagrams,” p. 126 ).

Table 35. Electric heat not operating

Probable Cause

Normal operation

Requested mode: off

Communicated disable

Manual output test

Diagnostic present

Unit configuration

No power to the controller

Unit wiring

Explanation

The controller cycles electric heat on and off to meet the unit capacity requirements.

It is possible to communicate the operating mode (such as off, heat, cool) to the controller. When off is communicated to the controller, the units shuts off the electric heat.

Numerous communicated requests may disable electric heat, including an auxiliary heat enable input and the heat/ cool mode input. Depending on the state of the communicated request, the unit may disable electric heat.

The controller includes a manual output test sequence that verifies analog and binary output operation and associated output wiring. However, based on the current step in the test sequence, the electric heat may not be on. Refer to

“Manual Output Test,” p. 108 .

A specific list of diagnostics affects electric heat operation. For more information, see “Diagnostics,” p. 107 .

The controller must be properly configured based on the actual installed end devices and application. When the unit configuration does not match the actual end device, the electric heat may not work properly.

If the controller does not have power, electric heat does not operate. For the controller to operate normally, a 24 Vac input voltage must be applied. When the green LED is off continuously, the controller does not have sufficient power or has failed.

The wiring between the controller outputs and the electric heat contacts must be present and correct for normal electric heat operation. Refer to the typical unit wiring diagrams (see “Wiring Diagrams,” p. 126 ).

Table 36. Fresh air damper stays open

Probable Cause

Normal operation

Manual output test

Unit configuration

Unit wiring

Explanation

The controller opens and closes the fresh air damper based on the controller’s occupancy mode and fan status.

Normally, the fresh air damper is open during occupied mode when the fan is running and closed during unoccupied mode.

The controller includes a manual output test sequence that verifies analog and binary output operation and associated output wiring. However, based on the current step in the test sequence, the fresh air damper may not be open. Refer to “Manual Output Test,” p. 108 .

The controller must be properly configured based on the actual installed end devices and application. When the unit configuration does not match the actual end device, the damper may not work correctly.

The wiring between the controller outputs and the fresh air damper must be present and correct for normal damper operation. Refer to the typical unit wiring diagrams (see “Wiring Diagrams,” p. 126 ).

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Diagnostics

Table 37. Fresh air damper stays closed

Probable Cause

Normal operation

Warmup and cooldown

Requested mode: off

Manual output test

Diagnostic present

Unit configuration

No power to the controller

Unit wiring

Explanation

The controller opens and closes the fresh air damper based on the controller’s occupancy mode and fan status.

Normally, the fresh air damper is open during occupied mode when the fan is running and closed during unoccupied mode.

The controller includes both a warmup and cooldown sequence to keep the fresh air damper closed during the transition from unoccupied to occupied. This is an attempt to bring the space under control as quickly as possible.

It is possible to communicate the operating mode (such as off, heat, cool) to the controller. When off is communicated to the controller, the unit closes the fresh air damper.

The controller includes a manual output test sequence that verifies analog and binary output operation and associated output wiring. However, based on the current step in the test sequence, the fresh air damper may not be open. Refer to “Manual Output Test,” p. 108 .

A specific list of diagnostics effects fresh air damper operation. For more information, see “Diagnostics,” p. 107 .

The controller must be properly configured based on the actual installed end devices and application. When the unit configuration does not match the actual end device, the damper may not work correctly.

If the controller does not have power, the fresh air damper does not operate. For the controller to operate normally, a 24 Vac input voltage must be applied. When the green LED is off continuously, the controller does not have sufficient power or has failed.

The wiring between the controller outputs and the fresh air damper must be present and correct for normal damper operation. Refer to the typical unit wiring diagrams (see “Wiring Diagrams,” p. 126 ).

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Diagnostics

Troubleshooting

Troubleshooting the Relay (Daughter) Board

The relay board serves as a common interface to all of the standard end devices, and has an LED that indicates power to the board. Factory switches are pre-set and locked in place with LocTite

®

.

However, these seals can be broken if field-modifications are needed.

If the board needs replacement, the switches on the new board must be field-set in the same positions as the old board, as shown in the unit wiring diagram.

Note:

SW3 and SW4 affect safety functionality, and they are factory secured. When replacing a board with SW3 and SW4, be sure to affix the switch positions with 3M 3764Q or equivalent.

Board switches are factory set based on unit control options. Figure 29 shows a relay board detail.

Additional information on switch settings follows.

Figure 28. Resistance temperature curve for the zone sensor, entering water temperature sensor, and discharge air sensor (thermistor = 10k

Ω

at 77°F)

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Diagnostics

114

Figure 29. Relay board detail

LED Indicates Power

Interface to Tracer ZN Controller

Configuration Switches

(Factor Pre-set)

Connection to Valve and

Piping Sensor Crossover

Harness

Do Not Adjust These

Switch Positions

Because it May Result in a Safety Hazard!

Note: HAZARDOUS Voltage in

Dashed Area of Board!

Switch SW1: Controller Type

SW1 determines the unit control type.

Position 1 indicates one of the following:

• generic field controller

• low-voltage fan speed switch

• Tracer ZN010

• Tracer ZN510

Position 2 indicates Tracer ZN520.

Switch SW2: Electric Heat

SW2 determines if the unit has electric heat.

Switch SW3: High-Speed Interlock

SW3 determines if the unit will have a safety-mandated “high-speed interlock” with electric heat.

High-speed interlock ensures heat dissipates in a manner that keeps the unit in a safe operating condition. SW3 configures the unit to actuate high-speed interlock if the first or second stage is on.

SW3 is a three-position slide switch that actuates high-speed interlock to operate with specific electric heat coils.

• Position 1: default position and for low vertical units with electric heat

• Position 2: single-stage electric heat, model number digit 18 = N

• Position 3: two-stage electric

Switch SW4: Electric Heat Lockout

SW4 allows the unit to use the electric heat lockout function when hydronic heat is in operation.

Electric heat lockout prevents electric heat from enabling when hydronic heating is available. This

UNT-SVX07B-EN

Diagnostics

feature is on models with both hydronic and electric heat. Low vertical models with electric heat, switch SW4 to position 2 (on).

Troubleshooting Wireless Controls

Locations of LEDs, Test button, Test Symbols, and Error Codes

The receiver for all models has four LEDs: LED1, LED2, LED3, and LED5. Figure 30 shows their locations.

Note:

To view LEDs on a flush mount receiver on a fan-coil unit, the front panel of the unit must be removed.

Figure 30. LED locations on the receiver

LED1

LED2

LED3

LED5

The sensor for model WTS have four LEDs: LED1, LED2, LED3, and LED5. The sensor for model

WDS has test symbols and error codes that appear on the display. All three sensor models have a Test button. Figure 31 shows their locations.

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Diagnostics

Figure 31. LED, Test button, and symbol locations on the sensor

LED1

LED2

LED3

LED5

.

Test symbols

Error code

Test button

Test button

WTS sensor WDS sensor

Diagnostics

LED1, LED2, and LED3, located on the sensor of model WTS respond to diagnostics by exhibiting specific blinking patterns. View their response by pressing the Test button (see Table 38 ).

Error codes appear on the display of the model WDS sensor when diagnostics occur (see Table 38 ).

Table 38. Diagnostics on the sensor

LED state when Test button is pressed

(WTS sensor)

N/A

Error code (WDS sensor display)

E0, E5, E7

Indicates...

Sensor failure

• Replace sensor

Disassociated

• Sensor is not associated with a receiver.

LED1: Off

LED2: Off

LED3

(a)

: 1-blink pattern repeated 3 times

LED1: Off

LED2: Off

LED3

(a)

: 2-blink pattern repeated 3 times

LED1: Off

LED2: Off

LED3

(a)

: 3-blink pattern repeated 3 times

LED1: Off

LED2: Off

LED3

(a)

: 4-blink pattern repeated 3 times

E1

E2

E3

E4

(a) Blink pattern is On for 1/4 s, Off for 1/4 s, with 2 s Off between repetitions.

Address set to 000

• Address not set to between 001–999.

Software error

• Replace sensor

Input voltage too high

• No RF transmission is permitted with an input battery voltage greater than 3.9 V.

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Diagnostics

LED1, LED2, and LED3, located on the receiver of all models, respond to diagnostics by exhibiting specific blinking patterns. They respond independently of any user action (see Table 39 ).

Table 39. Diagnostics on the receiver

LED state Indicates...

LED1: Off

LED2: Off

LED3: 1-blink pattern repeated continuously

(a)

Disassociated

• Receiver is not associated, waiting for a sensor.

• Receiver lost communication with sensor.

• Receiver has no devices on its wireless personal area network.

• Association with a device has been manually removed.

Address set to 000

• Address not set to between 001–999.

LED1: Off

LED2: Off

LED3: 2-blink pattern repeated continuously

(a)

LED1: Off

LED2: Off

LED3: 3-blink pattern repeated continuously

(a)

Not configured

• Receiver configuration properties not properly set (defective receiver).

(a) Blink pattern is On for 1/4 s, Off for 1/4 s, with 2 s Off between repetitions.

Testing Signal Strength

To initiate a signal strength test, push the Test button on the sensor (see location of Test button in

Figure 31, p. 116 ).

•

Models WTS:

LED1, LED2, and LED3 respond by indicating signal strength. You can view them on the sensor ( Table 40 ) and the receiver ( Table 41, p. 118 ).

•

Model WDS:

Test symbols on the sensor display indicate signal strength ( Table 40 ). LED1, LED2, and LED3, on the receiver, respond by indicating signal strength ( Table 41, p. 118 ).

Table 40. Observing signal strength on the sensor

User action LED state (WTS sensors)

None LED1: Off

LED2: Off

LED3: Off

Press Test button on the sensor

LED1: Off

LED2: Off

LED3: Off

Symbol (WDS sensor display)

No Test symbols appear

Indicates...

Normal state

• No Test button press.

Associated; no communication with receiver

• Associated, but no signal from the receiver after pressing Test button.

LED1: On

LED2: On

LED3: On

Displays for 5 seconds, then constantly

Off

LED1: Off

LED2: On

LED3: On

Displays for 5 seconds, then constantly

Off

LED1: Off

LED2: Off

LED3: On

Displays for 5 seconds, then constantly

Off

Excellent signal strength

• Good signal margin for reliable communication.

Satisfactory signal strength

• Adequate signal strength for reliable communication.

• Moving sensor or receiver may improve signal strength.

• Increased channel switching may reduce battery life.

Poor signal strength

• Unreliable communication.

• Strongly recommend moving the sensor or receiver to a better location.

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Diagnostics

Table 41. Observing signal strength on the receiver

User action LED state (receiver, all models)

None LED1: Off

LED2: Off

LED3: Off

Press Test button on the sensor

LED1: On

LED2: On

LED3: On

Displays for 5 seconds, then constantly Off

LED1: Off

LED2: On

LED3: On

Displays for 5 seconds, then constantly Off

LED1: Off

LED2: Off

LED3: On

Displays for 5 seconds, then constantly Off

Indicates...

Normal state

• No Test button press.

Excellent signal strength

• Good signal margin for reliable communication.

Satisfactory signal strength

• Adequate signal strength for reliable communication.

• Moving sensor or receiver may improve signal strength.

• Increased channel switching may reduce battery life.

Poor signal strength

• Unreliable communication

• Strongly recommend moving the sensor or receiver to a better location

Testing Battery Status

Initiate a battery status test as follows:

• On model WTS, push the Test button on the sensor (see location on Figure 31, p. 116 ). LED5 on the sensor responds by indicating the level of battery strength, as shown in Table 42 .

• On model WDS, push the Test button on the sensor (see location on Figure 31, p. 116 ). In response, a battery test symbol appears on the display. The symbol shown indicates battery life expectancy (see Table 43, p. 118 ).

Table 42. Battery status: LED5 on model WTS sensors

User action LED state (WTS)

Press Test button Solid green for 5 seconds

Indicates...

Battery is adequate for proper operation.

None

Solid red for 5 seconds

No light

25% battery life left. Batteries should be replaced.

Batteries life expired or not installed properly, or sensor is defective.

Blinking red: 1-blink pattern

(a)

repeated 5 times.

Cycle repeats every 15 minutes.

Approximately 14 days of operation remain before the battery is too weak to power the sensor.

(a) Blink pattern is On for 1/4 s, Off for 3/4 s, with 2 s Off between repetitions.

Table 43. Battery status: Battery symbol on model WDS sensor display

User action

Press Test button

Battery test symbol Indicates...

Full battery power.

50% battery life left.

25% battery life left. Replace batteries.

Flashing symbol indicates that approximately 14 days of operation remain before the battery is too weak to power the sensor.

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Diagnostics

24 V Power Status Indicator

LED5 on the receiver of all models ( Figure 30, p. 115 ) lights and stays constantly On when 24 V power is normal.

Using the Wireless Sensor System to Check Signal Strength on a Site

Follow these steps to check the signal strength on a site:

1.

Power up a receiver with a 24 V transformer (user supplied)

2. Associate the sensor to a receiver of the same model intended for the job

3. Place the receiver at the desired location

4. Place or hold the sensor at the desired location

5. Press the Test button (S5) on the sensor and observe the signal strength as indicated by LED1,

LED2, and LED3 on model WTS, and on the display on model WDS ( Figure 31, p. 116 ).

For more information on interpreting the LEDs and the display symbols that indicate signal strength, see “Testing Signal Strength,” p. 117 .

Replacing Sensor Batteries

Sensor battery type, length of life, and installation are addressed in this section.

Battery Type

NOTICE

Equipment Damage!

The batteries are manufactured in a ready-to-use state. They are not designed for recharging.

Recharging can cause battery leakage or, in some cases, can cause the safety release vent to open.

NOTICE

Equipment Damage!

Do not attempt to hook up the sensor to a power supply. Equipment damage may result.

Use two non-rechargeable 1.5 V lithium AA batteries in the sensor. To maintain UL rating, use only

UL-listed lithium batteries. The sensor ships with Energizer™ L91 batteries already installed.

Replacement batteries are available at Trane Service Parts Centers (p/n X13770035010) or other local suppliers.

Battery Life

Battery life is five years under normal conditions. If the sensor is not used for an extended period of time, do one of the following:

• Set the sensor address to 000 to place the sensor into a low-power hibernation mode.

• Remove the batteries

Notes:

•

If lithium batteries are temporarily unavailable, alkaline batteries can be used. However, alkaline battery life is very short by comparison.

•

The battery life for a model WDS may decrease with extended LCD display activity.

119

Diagnostics

120

Battery Installation



WARNING

Prevent Injury!

Batteries can explode or leak and cause burns if installed backwards, disassembled, charged, or exposed to water, fire, or high temperature.



WARNING

Prevent Injury!

Keep away from small children. If swallowed, contact your local poison control center immediately.

6. Observe the polarity indicators that are molded into the cover.

7.

Install two batteries (of the type specified in “Battery Type,” p. 119 ) in the battery-holding slot that is molded into the sensor cover.

The sensor has been designed to prevent damage if the batteries are installed backwards, to reduce the potential for injury.

Manual Association

Before attempting manual or automatic association, the receiver must indicate readiness to associate (one blink pattern of LED3 on receiver). Refer to “Observing the Receiver for Readiness to Associate,” p. 69 .

At any time, the manual association method can be used to associate the receiver with the sensor.

If an association was previously established between a receiver and a sensor and needs to be reestablished, the manual association process may be used. If an association has not yet been established, the automatic association process is recommended (see “Associating the Sensor to the Receiver,” p. 70 ).

8. Using a small screwdriver, set the three rotary address switches ( Figure 19, p. 69 , locations S1,

S2, S3) on the receiver to an address between 001 and 999.

Notes:

•

An address can be changed without powering down the receiver or sensor.

•

An address can be changed at any time after initial association has been established.

9. Set the three rotary address switches ( Figure 19, p. 69 , locations S1, S2, S3) on the sensor to the same address as the receiver.

10. Record the address and location of the receiver and sensor pair.

•

After verifying that the receiver and sensor are powered up, press the Test button on the sensor to establish that the signal strength ( “Testing Signal Strength,” p. 117 ) and the battery life “Testing Battery Status,” p. 118 ) are adequate for proper functioning.

Disassociation

The receiver disassociates from the sensor (by removing all stored association information), conducts a channel scan, and restarts itself, if any of the following are true:

• The receiver address is changed from its current setting (001–999)

• The receiver receives a disassociation notification from its associated sensor

• The receiver does not receive a communication from its associated sensor within 50 minutes.

• The sensor and receiver are associated and communicating at the time the sensor is set to 000 and the Test button is pressed.

Note:

A disassociated sensor will transit an association request every 10 minutes.

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Diagnostics

Sensor/Receiver Compatibility

Version 1.5 (p/n X13790854 and X13790855) and higher receivers are compatible with all sensors models and support all functions. Receivers released prior to version 1.5 are compatible with only model WTS.

Replacing a Failed Sensor or Receiver

Note:

Receivers ship installed on the unit. To remove the receiver, press in the retention tabs on the underside of the receiver enclosure (see Figure 18, p. 68 ) and push upward.

To replace a failed sensor or receiver:

11. Confirm that the device is disassociated (see Table 38 and Table 39, p. 117 ).

12. Set the rotary address switch of the new device to match the address of the remaining sensor or receiver.

Note:

There is no need to remove power from the remaining device.

13. Apply power to the new device. Association between the new and the remaining devices will automatically occur.

Note:

When replacing a WDS sensor, the receiver (version 1.5 or higher) will automatically configure the sensor to match the last stored configuration, if the sensor has not been placed into configuration mode and the factory default configuration is still valid. If the sensor configuration does not match the desired system features, it can be manually configured (see “Manual Association,” p. 120 ).

Servicing and Testing

If the wireless sensor system is not working as expected, use the tools and procedure described in this section.

Servicing and Testing Tools

No special tools or software are necessary to service and test the wireless sensor system. Test the system by using:

• The LEDs on the receiver, LEDs on the model WTS sensor, and the display on the model WDS sensor

• The Test button on the sensor

• The address test mode on the receiver

• A common volt-ohm meter

Procedure for Testing the Wireless Sensor System

If the wireless sensor system is not working as expected:

1.

Observe LED5 on the receiver. LED5 is On solid green whenever the receiver is powered.

2. Verify that the receiver is properly grounded. Both the GND-SIGNAL (black) wire and the GND-

POWER (yellow) wire must be grounded.

3. Press the Test button on the sensor.

•

Model WTS: LED5 should turn On solid green, indicating proper battery strength. LED1,

LED2, and LED3 will indicate signal strength.

Note:

When checking signal strength, both LED1 and LED3 on the receiver and sensor illuminate in unison if the sensor and receiver are associated. Use this feature to confirm association.

•

Model WDS: Battery life ( “Testing Battery Status,” p. 118 ) and signal strength ( “Testing

Signal Strength,” p. 117 ) are indicated on the display.

121

Diagnostics

Procedure for Testing the Receiver

If the receiver is not working as expected:

1.

Verify that the receiver is powered.

2. Set the receiver address to 000 to force the zone temperature output and zone temperature setpoint output to their default mode values (see “Output Values—Failure and Default Modes of Operation,” p. 122 ).

3. Measure the receiver output resistance (see “Measuring Output Resistance,” p. 122 ).

4. When the test is complete, reset the receiver address to its previous setting.

5. Press the Test button on the sensor to force re-association.

6. Confirm association and communication by noting LED1, LED2, and LED3 as described in

“Testing Signal Strength,” p. 117 .

Forcing a Sensor to Transmit

To force a wireless sensor to transmit during servicing, press the Test button on the sensor.

Output Power Level

The maximum output power level of a wireless sensor set is controlled by software and restricted by channel of operation and agency requirements per country or region. The sensor has a default maximum power level of 10 mW, but the receiver determines the ultimate output power level of the sensor.

Output Values—Failure and Default Modes of Operation

The following table provides output values for failure and default modes of operation, which can be used for troubleshooting.

Table 44. Output values

Situation

Zone temperature output

Zone setpoint output

Heating setpoint output

Fan/System output

Receiver address = 000

Receiver address = 001 to 999 and:

Receiver is powered up, but not is associated, or

Receiver has received a disassociation request from the associated sensor.

11.17 k Ω , 72.5°F

(22.5°C), indefinitely

451 Ω , 72.5°F

(22.5°C), indefinitely

501 Ω , 70.5°F

(21.4°C), indefinitely

2320 Ω

Fan = Auto

System = Off

11.17 k

Receiver address = 001 to 999 and receiver has not received a communication within 35 minutes from the associated sensor.

Open

Receiver has no power.

Open

Ω , 72.5°F

(22.5°C) Hold for 15 minutes, then open

Thermistor in sensor has failed to either open or close.

Open

Setpoint potentiometer has failed to either open or close.

Normal value

451 Ω , 72.5°F

(22.5°C),

Hold for 15 minutes, then open

Open

Open

Normal value

Open

501 Ω , 70.5°F

(21.4°C), indefinitely

Open

Open

Normal value

Open

2320 Ω

Fan = Auto

System = Off

Open

Open

N/A

N/A

Measuring Output Resistance

To measure the resistance of receiver outputs for zone temperature and setpoints for all models, and heating setpoint and fan/system for the WDS:

1.

Ensure that the GND-SIGNAL (black) wire and the GND-POWER (yellow) wire are grounded to the transformer.

2. Disconnect the ZONE (white) and SETPOINT (RED) wires from the controller. Disconnect the

HEAT SETPOINT (brown) and FAN/SYSTEM (green) wires from the controller, if applicable.

3. Measure resistance as follows:

122 UNT-SVX07B-EN

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Diagnostics

a. All models: Measure between the grounded GND-SIGNAL (black) wire and either the

SETPOINT (red) or ZONE (white) wire. Compare resistance measurements to those in

Table 45 .

b. WDS only: Measure between the grounded GND-SIGNAL (black) wire and the FAN/SYSTEM

(green) wire. Compare resistance measurements to those given in Table 46 .

Note:

The output circuits are not electrically powered; consequently, resistance can be measured without risk of damage to the volt-ohm meter.

Table 45. Receiver resistance table for all models

Zone or setpoint temperature

55°F (12.8°C)

60°F (15.6°C)

65°F (18.3°C)

70°F (21.1°C)

75°F (23.9°C)

80°F (26.7°C

85°F (29.4°C)

Nominal zone temperature output resistance

17.47 k Ω

15.3 k Ω

13.49 k Ω

11.9 k Ω

10.5 k Ω

9.3 k Ω

8.25 k Ω

Nominal setpoint and heating setpoint output resistance

792 Ω

695 Ω

597 Ω

500 Ω

403 Ω

305 Ω

208 Ω

Table 46. Receiver resistance table for model WDS

Fan command

High

Med

Low

Auto

Off

Nominal output resistance

16,130 Ω

13,320 Ω

10,770 Ω

2320 Ω

4870 Ω

Cleaning the Sensor

NOTICE

Equipment damage!

Spraying glass cleaner or any other solution directly on the sensor may damage it.

You can clean the sensor by applying glass cleaner to a soft, non-abrasive cloth, and gently wiping the face, including the buttons and LCD display. Use of a pre-moistened towelette designed for lens or screen cleaning is also acceptable.

Avoid inadvertent pressing of the Occupied/Unoccupied buttons on the keypad on the WDS sensor as this may result in an unwanted timed override or settings change.

123

Diagnostics

Troubleshooting Tracer ZN010, ZN510, and ZN520

124

Green STATUS LED

Indicates Whether the

Controller is Powered On

(24 Vac Supplied)

Yellow COMM LED

Indicates if

Communication is

Functioning

Red SERVICE LED

Indicates if Service is

Needed

Red SERVICE LED

During normal operation, the LED is off continuously when power is applied to the controller.

If the LED is on continuously, even when power is applied to the controller means that someone is pressing the SERVICE button or that the controller has failed.

If the LED flashes once every second, use Rover™, Trane’s service tool, to restore the unit to normal operation. Refer to the Rover™ product literature for more information.

Note:

If the Service button is held down for more than 15 seconds on the Tracer ZN520 controller, it will uninstall itself from the ICS communication network and shut down all unit operation.

Green STATUS LED

During normal operation, the LED is on continuously.

If the LED blinks once, the controller is in Manual output test mode.

If the LED blinks twice the controller is in Manual output test mode, with one or more diagnostics present.

If the LED blinks (1/4 second on, 1/4 second off for 10 seconds) the controller is in the “Wink” mode.

Note:

The “wink” feature allows the identification of a particular controller. When sending a request from a device, such as Rover™, the controller will “wink” to indicate it received the signal.

If the LED is off, either the power is off, an abnormal condition is present or the TEST button is pressed.

Yellow COMM LED

If the LED is off continuously, the controller is not detecting any communication. This is normal for units in standalone applications.

If the LED blinks, the controller detects communication.

If the LED is on continuously, this indicates an abnormal condition.

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Diagnostics

Manual Output Test

The purpose of the manual output test sequence is to verify output and end device operation. Use the manual output test to:

• Verify output wiring and operation without using Rover™, service tool

• Force the water valve to open and balance the hydronic system

Note:

The manual output test is not an automatic cycle. You must press the TEST button to proceed through each step.

The controller observes all diagnostics that occur during the test sequence. Although an automatic diagnostic reset sequence exists as part of the controller’s normal operation, the automatic diagnostic reset feature is not active during the test sequence.

If left in an individual test step, the controller remains in test mode for 60 minutes and then exits to normal operation.

Many service calls are due to unit diagnostics. The test sequence resets unit diagnostics and attempts to restore normal unit operation prior to testing the outputs. If the diagnostics remain after a reset, the STATUS LED indicates the diagnostic condition is still present (two blinks).

Manual Output Test Procedure

Follow the procedure below to test the Tracer ZN010, ZN510, and ZN520 controllers.

1.

Press and hold the TEST button for at least two seconds (not exceeding 5 seconds), and then release, to start the test mode.

2. The test sequence will turn off all outputs and then attempt to clear all diagnostics.

3. Press the TEST button several more times (no more than once per second) to advance through the test sequence.

The outputs are not subject to minimum times during the test sequence. However, the test sequence only permits one step per second which limits minimum output time.

The green LED is turned off when the TEST button is pressed. To begin the manual output test mode, press and hold the TEST button (turning off the green LED) for at least two seconds.The green LED will begin to blink, indicating the controller is in test mode.

Table 47. Test sequence for 1-heat/1-cool configurations

Steps

Fan

BOP1-3

Cool Output

BOP4

(a)

Heat Output

BOP5

Damper

BOP6

1. Off

2. Fan High

3. Fan Medium

4. Fan Low

Off

High

Off

Off

Medium Off

Low Off

Off

Off

Off

Off

Closed

Closed

Closed

Closed

5. Cool

6. Heat

7. Fresh Air Damper

(b)

8. Exit

High

High

High

(c)

On

Off

Off

Off

On

Off

Closed

Closed

Open

Note:

For all 1-heat/1-cool applications including 2-pipe changeover, BOP4 energizes in the cooling test stage and BOP5 energizes in the heat test stage.This occurs even though during normal 2-pipe changeover operation BOP4 controls the unit valve for both cooling and heating.

(a) At the beginning of the Fan High step, the controller attempts to clear all diagnostics.

(b) The fresh air damper (BOP6) only energizes during this step if binary output 6 has been configured as a fresh air damper.

(c) After the Fresh Air Damper step, the test sequence performs the Exit step.This initiates a reset and attempts to return the controller to normal operation.

125

Wiring Diagrams

CSTI Fan Speed Switch

UNT-SVX07B-EN 126

CSTI Non Fan Speed Switch

Wiring Diagrams

UNT-SVX07B-EN 127

Wiring Diagrams

Line Voltage Fan Speed Switch

128 UNT-SVX07B-EN

Tracer ZN010 with Electric Heat

Wiring Diagrams

UNT-SVX07B-EN 129

Wiring Diagrams

Tracer ZN510 with Main and Auxiliary Valves

130 UNT-SVX07B-EN

ZN520 with 2-Stage Electric Heat

Wiring Diagrams

UNT-SVX07B-EN 131

www.trane.com

For more information, contact your local Trane office or e-mail us at [email protected]

Literature Order Number

Date

Supersedes

UNT-SVX07B-EN

July 2010

UNT-SVX07A-EN (April 2005)

Trane has a policy of continuous product and product data improvement and reserves the right to change design and specifications without notice. Only qualified technicians should perform the installation and servicing of equipment referred to in this literature.