50TC---D

Single Package Rooftop, 50Hz

Cooling Only

with Puronr (R---410A) Refrigerant

Sizes: 17, 20, 24, 28, 30

Installation Instructions

NOTE: Read the entire instruction manual before starting the installation

TABLE OF CONTENTS

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . .

2

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9

Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 1 -- Plan for Unit Location . . . . . . . . . . . . . . . . . .

Roof Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 2 -- Plan for Sequence of Unit Installation . . . . .

9

13

9

9

Curb--Mount Installation

Pad--Mount Installation

. . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . .

Frame--Mount Installation . . . . . . . . . . . . . . . . . . .

Step 3 -- Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . .

Step 4 -- Provide Unit Support

Roof Curb Mount

. . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . .

Slab Mount (Horizontal Units Only)

Alternate Unit Support

(In Lieu of Curb or Slab Mount)

. . . . . . . . . .

. . . . . . . . . . . . .

13

Step 5 -- Field Fabricate Ductwork . . . . . . . . . . . . . . .

For Units with Accessory Electric Heaters

Step 6 -- Rig and Place Unit

Positioning on Curb

Step 7 -- Horizontal Duct Connection

. . . . .

. . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . .

14

14

14

14

15

Step 8 -- Install Outside Air Hood — Factory Option . .

16

Step 9 -- Check Pulley Alignment and Belt Tension

Pulley Alignment

. . .

. . . . . . . . . . . . . . . . . . . . . . . . .

17

17

13

13

13

13

13

13

13

Belt Tension . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17

Step 10 -- Install External Condensate Trap and Line . .

18

Step 11 -- Make Electrical Connections . . . . . . . . . . .

Units without Factory--Installed Disconnect . . . .

Units with Factory--Installed Disconnect

All Units

. . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Factory--Option Thru--Base Connections . . . . . .

18

19

19

19

20

Units without Thru--Base Connections . . . . . . . . .

Field Control Wiring . . . . . . . . . . . . . . . . . . . . . . .

20

20

Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Unit without Thru--Base Connection Kit

Heat Anticipator Settings

. . . . . . .

. . . . . . . . . . . . . . . . . . .

Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Low--Voltage Control Connections . . . . . . . . . . . .

PremierLinkt (Factory Option) . . . . . . . . . . . . . . .

Supply Air Temperature (SAT) Sensor . . . . . . . . .

Outdoor Air Temperature (OAT) Sensor

EconoMi$er2

. . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Field Connections

Space Sensors

. . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Connect Thermostat . . . . . . . . . . . . . . . . . . . . . . .

Configure the Unit for Thermostat Mode . . . . . .

Economizer Controls . . . . . . . . . . . . . . . . . . . . . . . .

Indoor Air Quality (CO

2

) Sensor

Outdoor Air Quality Sensor

. . . . . . . . . . . . .

. . . . . . . . . . . . . . . . .

Smoke Detector/Fire Shutdown (FSD) . . . . . . . . .

Filter Status Switch . . . . . . . . . . . . . . . . . . . . . . . .

Supply Fan Status Switch

Remote Occupied Switch

. . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . .

Power Exhaust (output) . . . . . . . . . . . . . . . . . . . . .

Space Relative Humidity Sensor

CCN Communication Bus

. . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . .

RTU Open Control System . . . . . . . . . . . . . . . . . . .

Supply Air Temperature (SAT) Sensor . . . . . . . . .

Outdoor Air Temperature (OAT) Sensor . . . . . . .

EconoMi$er2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . .

Space Temperature (SPT) Sensors . . . . . . . . . . . .

Indoor Air Quality (CO

2

) Sensor

Outdoor Air Quality Sensor

. . . . . . . . . . . . .

. . . . . . . . . . . . . . . . .

Connecting Discrete Inputs . . . . . . . . . . . . . . . . . .

29

30

32

32

28

28

28

29

27

28

28

26

26

27

27

32

33

33

33

34

34

24

24

26

21

22

24

24

20

20

21

21

Communication Wiring -- Protocols

General

. . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Local Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RTU Open Troubleshooting . . . . . . . . . . . . . . . . .

Outdoor Air Enthalpy Control

Differential Enthalpy Control

. . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . .

Smoke Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . .

Return Air Sensor Tube Installation . . . . . . . . . . .

Test/Rest Magnet . . . . . . . . . . . . . . . . . . . . . . . . . .

Additional Application Data . . . . . . . . . . . . . . . . .

Step 12 -- Adjust Factory--Installed Options . . . . . . . .

Step 13 -- Install Accessories . . . . . . . . . . . . . . . . . . .

39

39

42

42

37

37

38

38

35

35

36

36

START--UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . .

43

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock or other conditions which may cause personal injury or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or agency must use factory--authorized kits or accessories when modifying this product. Refer to the individual instructions packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloths for brazing operations and have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions attached to the unit. Consult local building codes for special requirements. In absence of local codes, it is recommended that the USA standard ANSI/NFPA 70, National Electrical

Code (NEC), be followed.

It is important to recognize safety information. This is the safety--alert symbol . When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury.

Understand the signal words DANGER, WARNING,

CAUTION, and NOTE. These words are used with the safety--alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices, which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.

!

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personal injury or death.

Before performing service or maintenance operations on unit, always turn off main power switch to unit and install lock(s) and lockout tag(s). Unit may have more than one power switch.

!

WARNING

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could cause personal injury, death and/or equipment damage.

Puronr (R--410A) refrigerant systems operate at higher pressures than standard R--22 systems. Do not use R--22 service equipment or components on Puron refrigerant equipment.

!

WARNING

PERSONAL INJURY AND ENVIRONMENTAL

HAZARD

Failure to follow this warning could cause personal injury or death.

Relieve pressure and recover all refrigerant before system repair or final unit disposal.

Wear safety glasses and gloves when handling refrigerants. Keep torches and other ignition sources away from refrigerants and oils.

!

CAUTION

CUT HAZARD

Failure to follow this caution may result in personal injury.

Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing, safety glasses and gloves when handling parts and servicing air conditioning units.

2

Fig. 1 -- Unit Dimensional Drawing – 17 and 20 Size Units

3

C101023

Fig. 1 -- Unit Dimensional Drawing – 17 and 20 Size Units (cont.)

C11328

4

Fig. 2 -- Unit Dimensional Drawing – 24 and 28 Size Units

5

C101025

Fig. 2 -- Unit Dimensional Drawing – 24 and 28 Size Units (cont.)

C11329

6

Fig. 3 -- Unit Dimensional Drawing – 30 Size Units

7

C11225

Fig. 3 -- Unit Dimensional Drawing – 30 Size Units (cont.)

C11235

8

INSTALLATION

Jobsite Survey

Complete the following checks before installation.

1. Consult local building codes or the U.S.A. National

Electrical Code (Ref: ANSI/NFPA 70, [American National Standards Institute/National Fire Protection Association], latest revision) for special installation requirements

2. Determine unit location (from project plans) or select unit location.

3. Check for possible overhead obstructions which may interfere with unit lifting or rigging.

Step 1 — Plan for Unit Location

Select a location for the unit and its support system (curb or other) that provides for the minimum clearances required for safety. This includes the clearance to combustible surfaces, unit performance and service access below, around and above unit as specified in unit drawings. See Fig. 4.

NOTE: Consider also the effect of adjacent units.

Unit may be installed directly on wood flooring or on

Class A, B, or C roof--covering material when roof curb is used.

Do not install unit in an indoor location. Do not locate air inlets near exhaust vents or other sources of contaminated air.

Although unit is weatherproof, avoid locations that permit water from higher level runoff and overhangs to fall onto the unit.

Select a unit mounting system that provides adequate height to allow installation of condensate trap per requirements. Refer to Step 10 — Install External

Condensate Trap and Line – for required trap dimensions.

Roof Mount —

Check building codes for weight distribution requirements. Unit operating weight is shown in Table 1.

2438 mm

(96 in)

914 mm

(36 in)

1067 mm

(42 in)

1067 mm

(42 in)

914 mm

(36 in)

50TC---D

Base Unit

Economizer

Curb

356 mm/14---in

610 mm/24---in

17

820 (1808)

111 (245)

95 (210)

132 (290)

Fig. 4 -- Service Clearance Dimensional Drawing

Table 1 – Operating Weights

20

827 (1823)

111 (245)

UNIT KG (LB)

24

895 (1973)

111 (245)

95 (210)

132 (290)

112 (246)

140 (308)

28

952 (2098)

111 (245)

112 (246)

140 (308)

30

998 (2196)

111 (245)

123 (270)

155 (342)

C101074

9

Fig. 5 -- Roof Curb Details – 17 and 20 Size Units

10

C09139A

Fig. 6 -- Roof Curb Details – 24 and 28 Size Units

11

C09140A

Fig. 7 -- Roof Curb Details – 30 Size Unit

12

C11251

Step 2 — Plan for Sequence of Unit Installation

The support method used for this unit will dictate different sequences for the steps of unit installation. For example, on curb--mounted units, some accessories must be installed on the unit before the unit is placed on the curb.

Review the following for recommended sequences for installation steps.

Curb--mounted installation —

Install curb

Install field--fabricated ductwork inside curb

Install thru--base service connection fittings (affects curb and unit)

Rig and place unit

Remove top skid

Install outside air hood

Install smoke detector tube

Install condensate line trap and piping

Make electrical connections

Install other accessories

Pad--mounted installation —

Prepare pad and unit supports

Rig and place unit

Remove duct covers and top skid

Install Return Air smoke detector sensor tube

Install field--fabricated ductwork at unit duct openings

Install outside air hood

Install condensate line trap and piping

Make electrical connections

Install other accessories

Frame--mounted installation —

Frame--mounted applications generally follow the sequence for a curb installation. Adapt as required to suit specific installation plan.

Step 3 — Inspect unit

Inspect unit for transportation damage. File any claim with transportation agency.

Confirm before installation of unit that voltage, amperage and circuit protection requirements listed on unit data plate agree with power supply provided.

Locate the carton containing the outside air hood parts; see Fig. 9 and 13. Do not remove carton until unit has been rigged and located in final position.

Step 4 — Provide Unit Support

Roof Curb Mount —

Accessory roof curb details and dimensions are shown in

Figs. 5, 6 and 7. Assemble and install accessory roof curb in accordance with instructions shipped with the curb.

NOTE: The gasketing of the unit to the roof curb is critical for a watertight seal. Install gasket supplied with the roof curb as shown in Figs. 5, 6 and 7. Improperly applied gasket can also result in air leaks and poor unit performance.

Curb should be level. This is necessary for unit drain to function properly. Unit leveling tolerances are show in

Fig. 8. Refer to Accessory Roof Curb Installation

Instructions for additional information as required.

C

A

MAXIMUM ALLOWABLE

DIFFERENCE MM (IN.)

B

A-B

6 (0.25”)

B-C

12 (0.5”)

Fig. 8 -- Unit Leveling Tolerances

A-C

12(0.5” )

C09386

Install insulation, cant strips, roofing felt, and counter flashing as shown. Ductwork must be attached to curb and not to the unit. Thru--the--base power connection must be installed before the unit is set on the roof curb.

If electric and control wiring is to be routed through the basepan, remove knockouts in basepan located in control box area of access panel; see Figs. 1, 2 or 3 for basepan knockout locations. Attach the service connections to the basepans.

Hood Carton Location

(rear access panel)

Control Box

Access Panel

Filter and

Indoor Coil

Access Panel

Indoor Blower

Access Panel

Electric Heat

Access Panel Compressor

(each side)

C11155

Fig. 9 -- Typical Access Panel and Compressor Locations

Slab Mount (Horizontal Units Only) —

Provide a level concrete slab that extends a minimum of

152 mm (6–in.) beyond unit cabinet. Install a gravel apron in front of condenser coil air inlet to prevent grass and foliage from obstructing airflow.

NOTE: Horizontal units may be installed on a roof curb if required.

Alternate Unit Support

(In Lieu of Curb or Slab Mount) —

A non--combustible sleeper rail can be used in the unit curb support area. If sleeper rails cannot be used, support the long sides of the unit with a minimum of 4 equally spaced 102 mm x 102 mm (4--in. x 4--in.) pads on each side. Locate pads so that they support the rails. Make sure to avoid the fork openings.

13

Step 5 — Field Fabricate Ductwork

Cabinet return-air static pressure (a negative condition) shall not exceed 87 Pa (0.5 in. wg) with economizer or without economizer.

For vertical ducted applications, secure all ducts to roof curb and building structure. Do not connect ductwork to unit.

Fabricate supply ductwork so that the cross sectional dimensions are equal to or greater than the unit supply duct opening dimensions for the first 458 mm (18 in.) of duct length from the unit basepan.

Insulate and weatherproof all external ductwork, joints, and roof openings with counter flashing and mastic in accordance with applicable codes.

Ducts passing through unconditioned spaces must be insulated and covered with a vapor barrier.

If a plenum return is used on a vertical unit, the return should be ducted through the roof deck to comply with applicable fire codes.

For Units with Accessory Electric Heaters —

Minimum clearance is not required around ductwork.

!

WARNING

PERSONAL INJURY HAZARD

Failure to follow this warning could cause personal injury.

For vertical supply and return units, tools or parts could drop into ductwork and cause an injury. Install a 90--degree turn in the return ductwork between the unit and the conditioned space. If a 90--degree elbow cannot be installed, then a grille of sufficient strength and density should be installed to prevent objects from falling into the conditioned space. Due to electric heater, supply duct will require 90--degree elbow.

Step 6 — Rig and Place Unit

Keep unit upright and do not drop. Spreader bars are not required if top crating is left on unit. Rollers may be used to move unit across a roof. Level by using unit frame as a reference. See Table 1 (on page 7) and Fig. 10 for additional information.

Lifting holes are provided in base rails as shown in

Fig. 10. Refer to rigging instructions on unit.

!

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage.

All panels must be in place when rigging. Unit is not designed for handling by fork truck when packaging is removed.

Before setting the unit onto the curb, recheck gasketing on curb.

Positioning on Curb —

Position unit on roof curb so that the following clearances are maintained: 6 mm ( 1 /

4 in.) clearance between the roof

( curb and the base rail inside the right and left, 12 mm

1 /

2 in.) clearance between the roof curb and the base rail inside the front and back. This will result in the distance between the roof curb and the base rail being approximately equal to Detail A and Detail B in Figs. 5, 6 and 7.

Do not attempt to slide unit on curb after unit is set. Doing so will result in damage to the roof curb seal.

Although unit is weatherproof, guard against water from higher level runoff and overhangs.

After unit is in position, remove rigging skids and shipping materials.

14

"B"

1371 mm

(54")

MINIMUM

SEE DETAIL A

"C"

PLACE ALL SEAL STRIP

IN PLACE BEFORE PLACING

UNIT ON ROOF CURB.

DUCT END

DETAIL A

"A"

UNIT

50TC---D17

50TC---D20

50TC---D24

50TC---D28

50TC---D30

MAX WEIGHT

KG

1011

1017

1033

1145

1295

LB

2228

2243

2277

2525

2849

MM

3249

3249

3595

3595

4007

A

IN

127.8

127.8

141.5

141.5

157.8

DIMENSIONS

B

MM IN

1491

1491

1816

1816

2040

58.7

58.7

71.5

71.5

80.3

MM

1328

1328

1328

1532

1532

C

NOTES:

1. Dimensions in ( ) are in inches.

2. Hook rigging shackles through holes in base rail, as shown in detail “A.” Holes in base rails are centered around the unit center of gravity. Use wooden top to prevent rigging straps from damaging unit.

IN

52.3

52.3

52.3

60.3

60.3

Fig. 10 -- Rigging Details

C11378

Step 7 — Horizontal Duct Connection

Refer to Figs. 1, 2 and 3 for locations and sizes of the horizontal duct connections. Note that there are two different return air duct connection locations – one for unit without an economizer (on back side of unit) and a different one for unit equipped with an economizer (on left end, under the economizer hood). The supply air duct connection is on the back side. See Fig. 11 for top view depicting typical horizontal duct arrangements.

Field--supplied 19 mm (3 /

4

--in) flanges should be attached to horizontal duct openings (see Fig. 11) and all ductwork should be secured to the flanges. Insulate and weatherproof all external ductwork, joints, and roof or building openings with counter flashing and mastic in accordance with applicable codes.

Horizontal

Supply Air

Supply

Location Back

Height --- mm (In.) 402 (15 7 /

8

)

Width --- mm (in.) 756 (29 3 /

4

)

Return Air Duct without

Economizer

Return without

Economizer

Back

1253 (49 3 /

8

)

593 (23 3 /

8

)

Return Air Duct with Economizer

C10740

Return with

Economizer

Left end

467 (18 3 /

8

)

1564 (61 5 /

8

)

Fig. 11 -- Horizontal Duct Opening Dimensions

15

Step 8 — Install Outside Air Hood — Factory

Option

The outside air hood for factory--option economizer and two--position damper is shipped in knock--down form and requires field assembly. The panel for the hood top is shipped on the end of the unit (see Fig. 12). The remaining parts for the hood assembly (including side panels, filters and tracks) are shipped in a carton that is secured to the rear of the blower assembly. Access the carton location through rear panel (see Fig. 13).

Hood Top

Shipping

Position

Hood

Package

Fig. 12 -- Hood Top – Shipping Position

C09134

Fig. 13 -- Hood Package – Shipping Location

C09133

To remove the hood parts package:

1. Remove the back blower access panel.

2. Locate and cut the strap, being careful to not damage any wiring.

3. Carefully lift the hood package carton through the back blower access opening.

See Fig. 14 for identification of the various parts of the hood assembly.

Apply Seal Strip to the front of this flange

7

Apply Seal Strips to the back of these surfaces

3

7

Apply Seal Strip to the front of this flange

Apply Seal Strips to the back of these flanges

2

4

4

4

4

Apply Seal Strip to the back of this flange 1

5 6

Seal Strips

Item # Description

1 Angles

2 Side Plates

3 Hood

4

5 Side Filter Supports

1

2

6

7

Qty

4

2

2

2

C09079

Fig. 14 -- Hood Part Identification and Seal Strip

Application Areas

To assemble the outside air hood:

1. Remove hood top panel from shipping position on unit end.

2. Install four angles to the upper end panel using the screws provided

3. Apply seal strip to mating flanges on the side plates of the hood (see Fig. 14).

4. Secure side plates to panel using the screws provided.

5. Apply seal strip to mating flange of the hood (see

Fig. 14).

6. Secure top flange using screws provided in kit.

7. Install outdoor air screens by sliding them into the channel formed by the four angles installed in step 2.

Make sure that the screens extend across the entire length of the hood.

8. Install side filter supports using the screws provided

9. Install side drip angles using the screws provided.

10. Run a continuous length of seal strip across the hood covering the engagement holes in the lower hood.

11. Install top diverter using the screws provided.

12. On units with barometric relief, remove screws at bottom of relief damper. Do not discard damper door.

2

5

6

Fig. 15 -- Hood Assembly – Completed

C09090

16

Step 9 — Check Pulley Alignment and Belt Tension

Pulley Alignment —

The motor pulley is an adjustable--pitch type that allows implementation of changes in fan wheel speed to match as--installed ductwork systems. The pulley consists of a fixed flange side that faces the motor (secured to the motor shaft) and a movable flange side that can be rotated around the fixed flange side that increases or reduces the pitch diameter of this driver pulley. (See Fig. 16.)

Belt Tension —

Check belt tension by using a spring--force tool (such as

Browning’s Part Number “Belt Tension Checker” or equivalent tool); tension should be between 2.3--4.5 kg

(5--10 lbs) with 13.3 mm ( 5 /

8 in.) deflection when measured at the centerline of the belt span. This point is at the center of the belt when measuring the distance between the motor shaft and the blower shaft.

NOTE: Without the spring--tension tool, place a straight edge across the belt surface at the pulleys, then deflect the belt at mid--span using one finger to a 12.7 mm ( deflection.

1 /

2 in.)

Adjust the belt tension by loosening the four motor rail mounting nuts and bolts where the motor rails bolts to the blower rails. There are two jack bolts and nuts that are used to slide the motor rails to either increase or decrease belt tension. There are locking nuts on the jack bolts that need to be loosened at the motor rail. Turn the jack bolts clockwise or counter clockwise until the correct belt tension is achieved. Ensure the fan shaft and motor shaft are parallel prior to tightening motor plate nuts. (see Fig. 17.)

C07075

Fig. 16 -- Checking Pulley Alignment

To align fan and motor pulleys:

1. Loosen fan pulley setscrews.

2. Slide fan pulley along fan shaft. Make angular alignment by loosening motor from mounting

3. Tighten fan pulley setscrews and motor mounting bolts to torque specifications.

4. Recheck belt tension.

Step 1: Loosen motor rail bolts

Step 2: Loosen jack bolt lock nuts

Step 3: Loosen or tighten jack bolts until proper belt tension is achieved

Fig. 17 -- Adjusting Belt Tension

C11447

17

Step 10 — Install External Condensate Trap and

Line

The unit has one 19 mm (3 /

4

-in.) condensate drain connection on the end of the condensate pan (see Fig. 18).

See Figs. 1, 2 and 3, item “E”, in the view labeled “BACK

(HORIZONTAL DISCHARGE W/O ECON)” for the location of the condensate drain connection.

CONDENSATE

DRAIN

CONNECTION

Fig. 18 -- Condensate Drain Pan Connection

C10729

The piping for the condensate drain and external trap can be completed after the unit is in place. Hand tighten fittings to the drain pan fitting. Provide adequate support for the drain line. Failure to do so can result in damage to the drain pan. See Fig. 19.

Step 11 — Make Electrical Connections

!

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personal injury or death.

Do not use gas piping as an electrical ground. Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if an electrical fault should occur. This ground may consist of electrical wire connected to unit ground lug in control compartment, or conduit approved for electrical ground when installed in accordance with local electrical codes or in absence of local codes, it is recommended that the U.S.A.

standard ANSI/NFPA 70, National Electrical Code

(NEC), be followed.

NOTE: Field--supplied wiring shall conform with the limitations of minimum 33_C (63_F) rise.

Field power wires are connected to the unit at line--side pressure lugs on the terminal block (see Fig. 20 or the wiring diagram label for control box component arrangement) or at factory--installed option non--fused disconnect switch. Use copper conductors only.

BLK

YEL

BLU

LOAD

SIDE

MINIMUM PITCH

25 mm (1 in.) PER

3m (10 ft.) OF LINE

BASE RAIL

OPEN

VENT

76 mm

(3 in.)

MIN

TO ROOF

DRAIN

SEE NOTE

ROOF

CURB

DRAIN PLUG

NOTE: Trap should be deep enough to offset maximum unit static difference. A 102 mm (4 in.) trap is recommended

C11354

Fig. 19 -- Condensate Drain Piping Details

All units must have an external trap for condensate drainage. Install a trap at least 102 mm (4-in.) deep and protect against freeze-up. If drain line is installed downstream from the external trap, pitch the line away from

( the unit at 25 mm in 3 m (1-in. per 10 ft) of run. Do not use a pipe size smaller than the unit connection of 19 mm

3 /

4

-in.).

LINE

SIDE

SEE

DETAIL A

L1

L2

L3

DETAIL

A

CONTROL BOX

Fig. 20 -- Location of TB1

C11181

NOTE: Make field power connections directly to line connection pressure lugs only.

The unit is factory wired for the voltage shown on the nameplate. Refer to unit label diagram for additional information.

18

!

WARNING

FIRE HAZARD

Failure to follow this warning could result in intermittent operation or performance satisfaction.

Do not connect aluminum wire between disconnect switch and air conditioning unit. Use only copper wire. (See Fig. 21.)

!

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage.

Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation would invalidate any applicable Carrier warranty.

Units Without Disconnect Option

11

TB

12 13

ELECTRIC

DISCONNECT

SWITCH

COPPER

WIRE ONLY

ALUMINUM

WIRE

A93033

Fig. 21 -- Disconnect Switch and Unit

Units Without Factory--Installed Disconnect —

When installing units, provide a disconnect switch of adequate size per local or national wiring code.

Disconnect sizing data is provided on the unit informative plate. Locate on unit cabinet or within sight of the unit per national or local codes.. Do not cover unit informative plate if mounting the disconnect on the unit cabinet.

Units with Factory--Installed Disconnect —

The factory--installed option disconnect switch is located in the main control box. The manual switch handle is accessible on the corner post adjacent to the control box access panel.

All Units --

All field wiring must comply with local codes. Size wire based on MCA (Minimum Circuit Amps) on the unit informative plate. See Fig. 22 for power wiring connections to the unit power terminal block and equipment ground.

Maximum wire size is 70.0 mm 2 (2/0 AWG) per pole.

Provide a ground--fault and short--circuit over--current protection device (fuse or breaker) per local code (or U.S.A.

NEC Article 440). Refer to unit informative data plate for

MOCP (Maximum Over--current Protection) device size.

Voltage to compressor terminals during operation must be within voltage range indicated on unit nameplate. On

3--phase units, voltages between phases must be balanced within 2% and the current within 10%. Use the following formula to determine the percent of voltage imbalance.

% Voltage Imbalance = 100 x max voltage deviation from average voltage average voltage

C09103

Disconnect per

NEC

L1 L2

400-3-50

L3

Units With Disconnect Option

Factory

Wiring

T1 T2 T3

L1

Optional

Disconnect

Switch

L2 L3

L1 L2 L3

Fig. 22 -- Power Wiring Connections

C11381

19

Table 2 – American/European Wire Conversions

Industry

Standard Size

AMERICAN

American Conversion

Size (mm 2 )

20 AWG

18 AWG

16 AWG

14 AWG

12 AWG

10 AWG

8 AWG

6 AWG

4 AWG

3 AWG

2 AWG

1 AWG

1/0 AWG

2/0 AWG

3/0 AWG

4/0 AWG

21.14

26.65

33.61

42.39

53.49

67.42

85.00

107.9

0.52

0.82

1.30

2.08

3.30

5.25

6.36

13.29

EUROPEAN

Industry Standard

Size (mm 2 )

25.0

—

35.0

50.0

—

70.0

95.0

120.0

4.0

6.0

10.0

16.0

0.5

1.0

1.5

2.5

Factory--Option Thru--Base Connections —

All units are equipped with the ability to bring utilities through the base.

The electrical entrance is located in the control box area can can be accessed through the control box access panel. An embossed area is provided with three knock outs. High voltage is brought through the multi knock out by removing the appropriate size for the size of the fitting required. A 22 mm ( 7 /

8

--in.) knock out is provided for low voltage. An additional 22 mm ( 7 /

8

--in.) knock out is provided for a 115 volt line which is used when the unit is equipped with the non--unit powered convenience outlet option.

All required fittings are field supplied. Install fittings when access to both top and bottom of the base pan is available.

Units without Thru--Base Connections —

1. Install liquid tight conduit between disconnect and control box.

2. Pull correctly rated high voltage wires through the conduit.

3. Install power lines to terminal connections as shown in Fig. 22.

Field Control Wiring —

The 50TC--D unit requires an external temperature control device. This device can be a thermostat (field--supplied) or a

PremierLink controller (available as factory--installed option or as field--installed accessory, for use on a Carrier Comfort

Network or as a stand alone control) or the RTU Open for

Building Management Systems using non--CCN protocols

(RTU Open is available as a factory--installed option only).

Thermostat —

Select a Carrier--approved accessory thermostat. When electric heat is installed in the 50TC unit, the thermostat must be capable of energizing the G terminal (to energize the Indoor Fan Contactor) whenever there is a space call for heat (energizing the W1 terminal). The accessory thermostats listed on the unit price pages can provide this signal but they are not configured to enable this signal as shipped.

Install the accessory thermostat according to installation instructions included with the accessory.

Locate the thermostat accessory on a solid wall in the conditioned space to sense average temperature in accordance with the thermostat installation instructions.

If the thermostat contains a logic circuit requiring 24--v power, use a thermostat cable or equivalent single leads of different colors with minimum of seven leads. If the thermostat does not require a 24--v source (no “C” connection required), use a thermostat cable or equivalent with minimum of six leads. Check the thermostat installation instructions for additional features which might require additional conductors in the cable.

For wire runs up to 15 m (50 ft.), use no. 18 AWG

(American Wire Gage) insulated wire (35_C minimum).

For 15 to 23 m5 (0 to 75 ft.), use no. 16 AWG insulated wire (35_C minimum). For over 23 m (75 ft.), use no. 14

AWG insulated wire (35_C minimum). All wire sizes larger than no. 18 AWG cannot be directly connected to the thermostat and will require a junction box and splice at the thermostat.

Typical

Thermostat

Corrections

Central

Terminal

Board

C

G

W2

X

C

See

Caution

G

W2

X

C

G

W2

20

W1

O/B/Y2

(see Note)

Y1

W1

Y2

W1

Y2

R

Y1

R

T–STAT

Y1

R

Note: Typical multi-function marking. Follow manufacturer’s configuration instructions to select Y2.

Field Wiring

!

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may cause a short circuit.

Carefully check the connection of control coductor for indoor fan control at terminal G. Connecting the indoor fan lead to terminal C will cause a short circuit condition which can cause component damage inside the unit or at thermostat.

C10731

Fig. 23 -- Typical Low--Voltage Control Connections

Unit without Thru--Base Connection Kit —

Correctly rated low voltage wire can be routed through the rubber grommet located on the corner post adjacent to the control box access panel. Route wire through the grommet and then route the wire behind the corner post utilizing the factory provided wire ties secured to the control box. This will insure separation of the field low voltage wire and the high voltage circuit. Route the low voltage wire to the central terminal board. See Fig. 24.

NOTE: If utilizing the through the base connections, route the low voltage wire through the wire ties to the central terminal board.

Configure for Electric Heat: To configure the factory--approved thermostat, open the Advanced Setup menu, scroll down to ELECTRIC HEAT and change

RANGE value from OFF to ON. Consult the thermostat installation instructions for full details.

Heat Anticipator Settings —

Set heat anticipator settings at 0.14 amp for the first stage and 0.14 amp for second--stage heating.

Rubber

Grommet

Corner

Post

Indoor Blower

Access Panel

Main Control

Box

Filter

Area

Heater

Module

Fig. 26 -- Typical Component Location

C10632

Electric Heater

Tracks

Wire

Ties

Thru the Base

Connection

Fig. 24 -- Field Control Wiring Raceway

C10734

Electric Heaters

50TC--D units may be equipped with field--installed accessory electric heaters. The heaters are modular in design.

Heater modules are installed in the compartment below the indoor blower access panel. Access is through the electric heat access panel. Heater modules slide into the compartment on tracks along the bottom of the heater opening. See

Fig. 25 Fig. 26 and Fig. 27. Refer to the Electric Heater Kit

Installation Instructions for complete details.

Control Box

Access Panel

Filter and

Indoor Coil

Access Panel

Indoor Blower

Access Panel

Electric Heat

Access Panel

C10631

Fig. 25 -- Typical Access Panel Location

Not all available heater modules may be used in every unit. Use only those heater modules that are approved for use in a specific size unit. Refer to the label on the unit cabinet for the list of approved heaters.

Electric Heater

Opening

Fig. 27 -- Electric Heater Compartment\

(Cover Removed)

C09142

Low--Voltage Control Connections —

Locate the plug assembly in the electric heater section of the main unit. Connect the plug with the mating low voltage plug located on the heater.

CTB

CONTL

BOARD

2 VIO

3 ORN

12

Field

Connections

BRN

ORN

Plug

Assembly

1

VIO

VIO

2

BRN

3

VIO BRN BRN

Elec Htr

VIO HR2 BRN

VIO HR1 BRN

HR1: On Heater 1 in Position #1

HR2: On Heater 2 in Position #2 (if installed)

C09149

Fig. 28 -- Accessory Electric Heater Control Connections

21

PremierLinkt (Factory--Option)

C08199

Fig. 29 -- PremierLink Controller

The PremierLink controller (see Fig. 29) is compatible with Carrier Comfort Networkr (CCN) devices. This control is designed to allow users the access and ability to change factory--defined settings, thus expanding the function of the standard unit control board. CCN service access tools include System Pilott, Touch Pilott and

Service Tool. (Standard tier display tools Navigatort and

Scrolling Marquee are not suitable for use with latest

PremierLink controller (Version 2.x).)

The PremierLink control is factory--mounted in the

50TC--D unit’s main control box to the right of the

Control Terminal Board (CTB) (see Fig. 30). Factory wiring is completed through harnesses connected to the

CTB thermostat. Field connections are made at a 16--pole terminal block (TB3) located at the top of the unit control box in front of the PremierLink controller. The factory--installed PremierLink control includes the supply--air temperature (SAT) sensor. The outdoor air temperature (OAT) sensor is included in the

FIOP/accessory EconoMi$ert2 package.

The PremierLink controller requires the use of a Carrier electronic thermostat or a CCN connection for time broadcast to initiate its internal timeclock. This is necessary for broadcast of time of day functions

(occupied/unoccupied).

NOTE: PremierLink controller is shipped in Sensor mode. To be used with a thermostat, the PremierLink controller must be configured to Thermostat mode. Refer to PremierLink Configuration instructions for Operating

Mode.

C10635

Fig. 30 -- 50TC--D Control Box Component Locations

22

Fig. 31 -- PremierLink Wiring Schematic

23

C101075

Supply Air Temperature (SAT) Sensor —

On FIOP--equipped 50TC--D unit, the unit is supplied with a supply--air temperature (SAT) sensor (33ZCSENSAT).

This sensor is a tubular probe type, approx 152 mm

(6--inches) in length. It is a nominal 10--k ohm thermistor.

The SAT is factory--wired. The SAT probe is mounted in the fan deck (see Fig. 32). It can be removed or remounted per local codes.. Drill or punch a 13 mm (1/2--in.) hole in the flange or duct. Use two field--supplied, self--drilling screws to secure the sensor probe in a horizontal orientation. Insure that the sensor wires do not contact the hot surface of the electric heaters.

SUPPLY AIR

TEMPERATURE

SENSOR

SUPPLY AIR RETURN AIR

ROOF

CURB

Fig. 32 -- Mounting Location for Supply Air

Temperature (SAT) Sensor on 50TC--D Units

C10733

NOTE: Refer to Form 33CS--68SI for complete

PremierLink configuration, operating sequences and troubleshooting information. Have a copy of this manual available at unit start--up.

NOTE: The sensor must be mounted in the discharge airstream downstream of the cooling coil and any heating devices. Be sure the probe tip does not come in contact with any of the unit’s heater surfaces.

Outdoor Air Temperature (OAT) Sensor —

The OAT is factory--mounted in the EconoMi$er2 (FIOP or accessory). It is a nominal 10k ohm thermistor attached to an eyelet mounting ring.

EconoMi$er2 —

The PremierLink control is used with EconoMi$er2

(option or accessory) for outdoor air management. The damper position is controlled directly by the PremierLink control; EconoMi$er2 has no internal logic device.

Outdoor air management functions can be enhanced with field--installation of these accessory control devices:

Enthalpy control (outdoor air or differential sensors)

Space CO

2 sensor

Outdoor air CO

2 sensor

Refer to Table 3 for accessory part numbers.

Field Connections

Field connections for accessory sensor and input devices are made at the 16--pole terminal block (TB3, see Fig. 31) located on the control box top in front of the PremierLink control . Some input devices also require a 24--vac signal source; connect at CTB terminal R at “THERMOSTAT” connection strip for this signal source. See connections figures on following pages for field connection locations

(and for continued connections at the PremierLink board inputs).

Table 4 provides a summary of field connections for units equipped with Space Sensor. Table 5 provides a summary of field connections for units equipped with Space Thermostat.

Table 3 – PremierLink Sensor Usage

APPLICATION

OUTDOOR AIR

TEMPERATURE

SENSOR

RETURN AIR

TEMPERATURE

SENSOR

OUTDOOR AIR

ENTHALPY SENSOR

Differential Dry Bulb

Temperature with

PremierLink

(PremierLink requires

4---20 mA Actuator)

Single Enthalpy with

PremierLink

(PremierLink requires

4---20mA Actuator)

Differential Enthalpy with PremierLink

(PremierLink requires

4---20mA Actuator)

Included ---

CRTEMPSN001A00

Included ---

Not Used

Included ---

Not Used

Required ---

33ZCT55SPT or equivalent

---

---

---

Requires ---

33CSENTHSW

Requires ---

33CSENTHSW or equivalent

NOTES:

CO

2

Sensors (Optional):

33ZCSENCO2 --- Room sensor (adjustable). Aspirator box is required for duct mounting of the sensor.

33ZCASPCO2 --- Aspirator box used for duct---mounted CO

2

33ZCT55CO2 --- Space temperature and CO

33ZCT56CO2 --- Space temperature and CO

2

2 room sensor.

room sensor with override.

room sensor with override and setpoint.

24

RETURN AIR

ENTHALPY SENSOR

---

---

Requires ---

33CSENTSEN or equivalent

Table 4 – Space Sensor Mode

LEGEND:

T55

T56

CCN

CMPSAFE

FILTER

TB3 TERMINAL

1

2

3

6

7

4

5

12

13

14

10

11

8

9

15

16

FIELD CONNECTION

T55---SEN/T56---SEN

RMTOCC

T55---SEN/T56---SEN

CMPSAFE

T56---SET

FSD

LOOP---PWR

SPS

IAQ---SEN

FILTER

IAQ---COM/OAQ---COM/RH---COM

CCN + (RED)

OAQ---SEN/RH---SEN

CCN Gnd (WHT)

AUX OUT(Power Exhaust)

CCN --- (BLK)

--- Space Temperature Sensor

--- Space Temperature Sensor

--- Carrier Comfort Network (communication bus)

--- Compressor Safety

--- Dirty Filter Switch

FSD --- Fire Shutdown

IAQ --- Indoor Air Quality (CO

OAQ --- Outdoor Air Quality (CO

2

RH --- Relative Humidity

2

)

)

SFS --- Supply Fan Status

INPUT SIGNAL

Analog (10k thermistor)

Discrete, 24VAC

Analog (10k thermistor)

Discrete, 24VAC

Analog (10k thermistor)

Discrete, 24VAC

Analog, 24VDC

Discrete, 24VAC

Analog, 4---20mA

Discrete, 24VAC

Analog, 4---20mA

Digital, , 5VDC

Analog, 4---20mA

Digital, 5VDC

(Output)Discrete 24VAC

Digital, 5VDC

Table 5 – Thermostat Mode

TB3 TERMINAL

1

4

5

2

3

10

11

12

13

8

9

6

7

14

15

16

FIELD CONNECTION

RAT SEN

G

RAT SEN

Y1

Y2

LOOP---PWR

W1

IAQ---SEN

W2

IAQ---COM/OAQ---COM/RH---COM

CCN + (RED)

OAQ---SEN/RH---SEN

CCN Gnd (WHT)

AUX OUT (Power Exhaust)

CCN --- (BLK)

LEGEND:

CCN --Carrier Comfort Network (communication bus)

G --Thermostat Fan

IAQ --Indoor Air Quality (CO

2

)

OAQ --Outdoor Air Quality (CO

2

RAT --Return Air Temperature

)

INPUT SIGNAL

Analog (10k thermistor)

Discrete, 24VAC

Analog (10k thermistor)

Discrete, 24VAC

Discrete, 24VAC

Analog, 24VDC

Discrete, 24VAC

Analog, 4---20mA

Discrete, 24VAC

Analog, 4---20mA

Digital, 5VDC

Analog, 4---20mA

Digital, 5VDC

(Output) Discrete 24VAC

Digital, 5VDC

RH --- Relative Humidity

W1 --- Thermostat Heat Stage 1

W2 --- Thermostat Heat Stage 2

Y1 --- Thermostat Cool Stage 1

Y2 --- Thermostat Cool Stage 2

25

Space Sensors —

The PremierLink controller is factory--shipped configured for Space Sensor Mode. A Carrier T--55 or T--56 space sensor must be used. T--55 space temperature sensor provides a signal of space temperature to the PremierLink control. T--56 provides same space temperature signal plus it allows for adjustment of space temperature setpoints from the face of the sensor by the occupants.

1 2 3 4 5 6 RED(+)

WHT(GND)

BLK(-)

SEN

SW1

BRN (GND)

BLU (SPT)

CCN COM

SENSOR WIRING

C08201

Fig. 33 -- T--55 Space Temperature Sensor Wiring

Connect T--55: See Fig. 33 for typical T--55 internal connections. Connect the T--55 SEN terminals to TB3 terminals 1 and 3 (see Fig. 34).

SEN

TB3

1

PL

J6-7

SEN 3

Fig. 34 -- PremierLink T--55 Sensor

J6-6

C10023

Connect T--56: See Fig. 35 for T--56 internal connections.

Install a jumper between SEN and SET terminals as illustrated. Connect T--56 terminals to TB3 terminals 1, 3 and 5 (see Fig. 36).

1 2 3 4 5 6 RED(+)

WHT(GND)

BLK(-)

SW1

SEN SET

BLK

(T56)

BRN (GND)

BLU (SPT)

Cool Warm

CCN COM

SENSOR WIRING

JUMPER

TERMINALS

AS SHOWN

Fig. 35 -- T--56 Internal Connections

C08202

SEN

SEN

TB3

1

TB3

3

PL

J6-7

PL

J6-6

Jumper

SET

SET 5

Fig. 36 -- PremierLink T--56 Sensor

J6-5

C10022

Connect Thermostat —

A 7--wire thermostat connection requires a 24--v power source and a common connection. Use the R and C terminals on the CTB’s THERMOSTAT connection strip for these. Connect the thermostat’s Y1, Y2, W1, W2 and

G terminals to PremierLink TB3 as shown in Fig. 37.

If the 50TC--D unit is equipped with factory--installed smoke detector(s), disconnect the factory BLU lead at

TB3--6 (Y2) before connecting the thermostat. Identify the

BLU lead originating at CTB--DDC--1; disconnect at

TB3--6 and tape off. Confirm that the second BLU lead at

TB3--6 remains connected to PremierLink J4--8.

SPACE

THERMOSTAT

R

G

Y1

Y2

W1

CTB

THERMOSTAT

R

TB3

2

4

6

8

PL

J4-12

J4-10

J4-8

J4-6

W2

C

10

C CTB

THERMOSTAT

J4-4

C10283

Fig. 37 -- Space Thermostat Connections

If the 50TC unit has an economizer system and free--cooling operation is required, a sensor representing Return Air

Temperature must also be connected (field--supplied and installed). This sensor may be a T--55 Space Sensor (see Fig.

33) installed in the space or in the return duct, or it may be sensor PNO 33ZCSENSAT, installed in the return duct.

Connect this sensor to TB3--1 and TB3--3 per Fig. 34.

Configure the Unit for Thermostat Mode —

Connect to the CCN bus using a CCN service tool and navigate to PremierLink Configuration screen for

Operating Mode. Default setting is Sensor Mode (value

1). Change the value to 0 to reconfigure the controller for

Thermostat Mode.

When the PremierLink is configured for Thermostat

Mode, these functions are not available: Fire Shutdown

(FSD), Remote Occupied (RMTOCC), Compressor Safety

(CMPSAFE), Supply Fan Status (SFS), and Filter Pressure

Switch (FILTER).

26

Economizer Controls

Indoor Air Quality (CO

2

) Sensor —

The indoor air quality sensor accessory monitors space carbon dioxide (CO

2

) levels. This information is used to monitor IAQ levels. Several types of sensors are available, for wall mounting in the space or in return duct, with and without LCD display, and in combination with space temperature sensors. Sensors use infrared technology to measure the levels of CO

2 present in the space air.

The CO

2 sensors are all factory set for a range of 0 to

2000 ppm and a linear mA output of 4 to 20. Refer to the instructions supplied with the CO

2 typical CO

2 sensor wiring schematic.

sensor for electrical requirements and terminal locations. See Fig. 38 for

+

-

+

0-10VDC

SIG COM

4-20mA

NC ALARM

COM

NO

}

RELAY

CONTACTS

To connect the sensor to the control, identify the positive

(4 to 20 mA) and ground (SIG COM) terminals on the sensor. See Fig. 38. Connect the 4--20 mA terminal to terminal TB3--9 and connect the SIG COM terminal to terminal TB3--11. See Fig. 39.

IAQ Sensor

J4

4-20mA

SIG COM

TB3

9

TB3

11

PL

J5-5

J5-3

24 VAC

Fig. 39 -- Indoor CO

2

Sensor (33ZCSENCO2)

Connections

C11156

Refer to Form 33CS--68SI, PremierLink Installation,

Start--up, and Configuration Instructions, for detailed configuration information.

Outdoor Air Quality Sensor

(PNO 33ZCSENCO2 plus weatherproof enclosure) —

The outdoor air CO

2 sensor is designed to monitor carbon dioxide (CO

2

) levels in the outside ventilation air and interface with the ventilation damper in an HVAC system.

The OAQ sensor is packaged with an outdoor cover. See

Fig. 40. The outdoor air CO

2 economizer outside air hood.

sensor must be located in the

H G 24 VAC

+ -

OR

24 VDC

2 1

J3

8 7 6 5 4 3 2 1

J4

C08635

Fig. 38 -- Indoor/Outdoor Air Quality (CO

2

) Sensor

(33ZCSENCO2) -- Typical Wiring Diagram

To accurately monitor the quality of the air in the conditioned air space, locate the sensor near a return--air grille (if present) so it senses the concentration of CO

2 leaving the space. The sensor should be mounted in a location to avoid direct breath contact.

Do not mount the IAQ sensor in drafty areas such as near supply ducts, open windows, fans, or over heat sources.

Allow at least 0.9 m (3 ft) between the sensor and any corner. Avoid mounting the sensor where it is influenced by the supply air; the sensor gives inaccurate readings if the supply air is blown directly onto the sensor or if the supply air does not have a chance to mix with the room air before it is drawn into the return airstream.

Wiring the Indoor Air Quality Sensor: For each sensor, use two 2--conductor 18 AWG (American Wire Gage) twisted--pair cables (unshielded) to connect the separate isolated 24 vac power source to the sensor and to connect the sensor to the control board terminals.

COVER REMOVED SIDE VIEW

Fig. 40 -- Outdoor Air Quality Sensor Cover

C07135

Wiring the Outdoor Air CO

2

Sensor: A dedicated power supply is required for this sensor. A two--wire cable is required to wire the dedicated power supply for the sensor. The two wires should be connected to the power supply and terminals 1 and 2.

To connect the sensor to the control, identify the positive

(4 to 20 mA) and ground (SIG COM) terminals on the

OAQ sensor. See Fig. 38. Connect the 4 to 20 mA terminal to the TB3--13 terminal of the 50TC--D . Connect the SIG COM terminal to the TB3--11 terminal of the

50TC--D. See Fig. 41.

27

OAQ Sensor

4-20mA

SIG COM

TB3

13

TB3

11

PL

J5-2

J5-3

24 VAC

Fig. 41 -- Outdoor CO

2

Sensor Connections

C11157

Smoke Detector/Fire Shutdown (FSD) —

This function is available only when PremierLink is configured for (Space) Sensor Mode. The unit is factory--wired for PremierLink FSD operation when

PremierLink is factory--installed.

On 50TC--D units equipped with factory--installed Smoke

Detector(s), the smoke detector controller implements the unit shutdown through its NC contact set connected to the unit’s CTB input. The FSD function is initiated via the smoke detector’s Alarm NO contact set. The PremierLink communicates the smoke detector’s tripped status to the

CCN building control. See Fig. 31, The PremierLink wiring schematic.

Filter Status Switch —

This function is available only when PremierLink is configured for (Space) Sensor Mode.

PremierLink control can monitor return filter status in two ways: By monitoring a field--supplied/installed filter pressure switch or via supply fan runtime hours.

Using switch input: Install the dirty filter pressure switch according to switch manufacturer’s instructions, to measure pressure drop across the unit’s return filters.

Connect one side of the switch’s NO contact set to CTB’s

THERMOSTAT--R terminal. Connect the other side of the

NO contact set to TB3--10. Setpoint for Dirty Filter is set at the switch. See Fig. 42.

Filter Switch (NO, close on rising pressure (high drop))

CTB

Thermostat

R

TB3

10

PL

J4-4

C10286

Fig. 42 -- PremierLink Filter Switch Connection

When the filter switch’s NO contact set closes as filter pressure drop increases (indicating dirt--laden filters), the input signal to PremierLink causes the filter status point to read “DIRTY”.

Using Filter Timer Hours: Refer to Form 33CS--68SI for instructions on using the PremierLink Configuration screens and on unit alarm sequence.

Supply Fan Status Switch —

The PremierLink control can monitor supply fan operation through a field--supplied/installed differential pressure switch. This sequence will prevent (or interrupt) operation of unit cooling, heating and economizer functions until the pressure switch contacts are closed indicating proper supply fan operation.

Install the differential pressure switch in the supply fan section according to switch manufacturer’s instructions.

Arrange the switch contact to be open on no flow and to close as pressure rises indicating fan operation.

Connect one side of the switch’s NO contact set to CTB’s

THERMOSTAT--R terminal. Connect the other side of the

NO contact set to TB3--8. Setpoint for Supply Fan Status is set at the switch. See Fig. 43.

Fan (Pressure) Switch (NO, close on rise in pressure)

CTB

Thermostat

R

TB3

8

PL

J4-6

C10287

Fig. 43 -- PremierLink Wiring Fan Pressure Switch

Connection

Remote Occupied Switch —

The PremierLink control permits a remote timeclock to override the control’s on--board occupancy schedule and place the unit into Occupied mode. This function may also provide a “Door Switch” time delay function that will terminate cooling and heating functions after a 2--20 minute delay.

Connect one side of the NO contact set on the timeclock to

CTB’s THERMOSTAT--R terminal. Connect the other side of the timeclock contact to the unit’s TB3--2 terminal (see

Fig 44).

Remote Occupied

LCTB

Thermostat

R

Time Clock

TB3

2

PL

J4-12

C10288

Fig. 44 -- PremierLink Wiring Remote Occupied

Refer to Form 33CS--68SI for additional information on configuring the PremierLink control for Door Switch timer function.

Power Exhaust (output) —

Connect the accessory Power Exhaust contactor coils(s) per Fig. 45.

Power Exhaust

PER VIO

TB3

15

CTB

THERMOSTAT

C

PL

J8-3

BRN

Fig. 45 -- PremierLink Power Exhaust Output

Connection

C11158

28

Space Relative Humidity Sensor —

The RH sensor is not used with 50Hz 50TC--D models at this time.

CCN Communication Bus —

The PremierLink controller connects to the bus in a daisy chain arrangement. Negative pins on each component must be connected to respective negative pins, and likewise, positive pins on each component must be connected to respective positive pins. The controller signal pins must be wired to the signal ground pins.

Wiring connections for CCN must be made at the 3--pin plug.

At any baud (9600, 19200, 38400 baud), the number of controllers is limited to 239 devices maximum. Bus length may not exceed 4000 ft (1219 m), with no more than 60 total devices on any 1000--ft (305 m) section. Optically isolated RS--485 repeaters are required every 1000 ft

(305 m).

NOTE: Carrier device default is 9600 band.

Communications Bus Wire Specifications: The CCN

Communication Bus wiring is field--supplied and field--installed. It consists of shielded 3--conductor cable with drain (ground) wire. The cable selected must be identical to the CCN Communication Bus wire used for the entire network.

See Table 6 for recommended cable.

Table 6 – Recommended Cables

MANUFACTURER

Alpha

American

Belden

Columbia

CABLE PART NO.

2413 or 5463

A22503

8772

02525

NOTE: Conductors and drain wire must be at least 20

AWG (American Wire Gage), stranded, and tinned copper.

Individual conductors must be insulated with PVC,

PVC/nylon, vinyl, Teflon, or polyethylene.

An aluminum/polyester 100% foil shield and an outer jacket of PVC, PVC/nylon, chrome vinyl, or Teflon with a minimum operating temperature range of --20_C to 60_C

(4_F to 140_F) is required. Do not run communication wire in the same conduit as or next to any AC voltage wiring.

The communication bus shields must be tied together at each system element. If the communication bus is entirely within one building, the resulting continuous shield must be connected to ground at only one single point. If the communication bus cable exits from one building and enters another building, the shields must be connected to the grounds at a lightning suppressor in each building (one point only).

Connecting CCN bus:

NOTE: When connecting the communication bus cable, a color code system for the entire network is recommended to simplify installation and checkout. See

Table 7 for the recommended color code.

Table 7 – Color Code Recommendations

SIGNAL TYPE

+

Ground

---

CCN BUS WIRE

COLOR

Red

White

Black

CCN PLUG PIN

NUMBER

1

2

3

Connect the CCN (+) lead (typically RED) to the unit’s

TB3--12 terminal. Connect the CCN (ground) lead

(typically WHT) to the unit’s TB3--14 terminal. Connect the CCN (--) lead (typically BLK) to the unit’s TB3--16 terminal. See Fig. 46.

CCN Bus

+ (RED)

TB3

12

PL

J2-1

GND (WHT)

TB3

14 J2-2

– (BLK)

TB3

16 J2-3

Fig. 46 -- PremierLink CCN Bus Connections

C10290

29

RTU Open Control System

The RTU Open control is factory--mounted in the

50DC*D unit’s main control box, to the right of the CTB.

See Fig. 30. Factory wiring is completed through harnesses connected to the CTB. Field connections for

RTU Open sensors will be made at the Phoenix connectors on the RTU Open board. The factory--installed RTU Open control includes the supply--air temperature (SAT) sensor.

The outdoor air temperature (OAT) sensor is included in the FIOP/accessory EconoMi$er2 package.

The RTU Open controller is an integrated component of the

Carrier rooftop unit. Its internal application programming provides optimum performance and energy efficiency. RTU

Open enables the unit to run in 100% stand--alone control mode, Carrier’s I--Vu Open network, or a Third Party

Building Automation System (BAS). On--board DIP switches allow you to select your protocol (and baud rate) of choice among the four most popular protocols in use today:

BACnet, Modbus, Johnson N2 and LonWorks. (See Fig. 47.)

Refer to Table 8, RTU Open Controller Inputs and Outputs for locations of all connections to the RTU Open board.

Fig. 47 -- RTU Open Multi--Protocol Control Board

C10811

30

Fig. 48 -- RTU Open System Control Wiring Diagram

31

C101076

Table 8 – RTU Open Controller Inputs and Outputs

POINT NAME

Space Temp / Zone Temp

Supply Air Temperature

Outdoor Air Temperature

Space Temperature Offset Pot

Safety Chain Feedback

Compressor Safety Status

Fire Shutdown Status

Enthalpy Status

Humidistat Input Status

Indoor Air CO2

Outdoor Air CO2

Space Relative Humidity

Supply Fan Status*

Filter Status*

Door Contact Input*

Occupancy Contact*

Economizer Output

Supply Fan Relay State

Compressor 1 Relay State

Compressor 2 Relay State

Heat Stage 1 Relay State

Heat Stage 2 Relay State

Power Exhaust Relay State

Dehumidification Relay State

BACnet OBJECT

NAME

TYPE OF I/O

DEDICATED INPUTS zone_temp AI (10K Thermistor) sa_temp oa_temp

AI (10K Thermistor)

AI (10K Thermistor) stpt_adj_offset safety_status comp_status firedown_status enthalpy_status humstat_status

AI (100K Potentiometer)

DI (24 VAC)

DI (24 VAC)

DI (24 VAC)

DI (24 VAC)

DI (24 VAC) iaq

CONFIGURABLE INPUTS

AI (4---20 ma) oaq space_rh sfan_status filter_status

AI (4---20 ma)

AI (4---20 ma)

DI (24 VAC)

DI (24 VAC) door_contact_status occ_contact_status

DI (24 VAC)

DI (24 VAC)

OUTPUTS econ_output sfan comp_1 comp_2 heat_1 heat_2 pexh dehum

AO (4---20ma)

DO Relay (24VAC , 1A)

DO Relay (24VAC , 1A)

DO Relay (24VAC , 1A)

DO Relay (24VAC , 1A)

DO Relay (24VAC , 1A)

DO Relay (24VAC , 1A)

DO Relay (24VAC, 1A)

LEGEND

AI --- Analog Input

AO --- Analog Output

DI --- Discrete Input

DO --- Discrete Output

* These inputs (if installed) take the place of the default input on the specific channel according to schematic.

Parallel pins J5---1 = J2---6, J5---3 = J1---10, J5---5 = J1---2 are used for field---installation.

The RTU Open controller requires the use of a Carrier space sensor. A standard thermostat cannot be used with the RTU Open system.

Supply Air Temperature (SAT) Sensor —

On FIOP--equipped 50TC--D unit, the unit is supplied with a supply--air temperature (SAT) sensor (33ZCSENSAT).

This sensor is a tubular probe type, approx 152 mm

(6--in.) in length. It is a nominal 10--k ohm thermistor.

The SAT is factory--wired. The SAT probe is wire--tied to the supply--air opening (on the horizontal opening end) in its shipping position. Remove the sensor for installation.

Re--position the sensor in the flange of the supply--air opening or in the supply air duct (as required by local codes). Drill or punch a 13 mm (1 /

2

--in.) hole in the flange or duct. Use two field--supplied, self--drilling screws to secure the sensor probe in a horizontal orientation. See

Fig. 32.

CONNECTION PIN

NUMBER(S)

J20---1, 2

J2---1, 2

J2---3, 4

J20---3

J1---9

J1---2

J1---10

J2---6

J5---7

J4---2 or J4---5

J5---1 or J5---3 or

J5 5 or J5---7

J2---5

J1---4

J1---8

J1---7

J1---6

J1---5

J11---3

J11---7, 8

Outdoor Air Temperature (OAT) Sensor —

The OAT is factory--mounted in the EconoMi$er2 (FIOP or accessory). It is a nominal 10k ohm thermistor attached to an eyelet mounting ring.

EconoMi$er2 —

The RTU Open control is used with EconoMi$er2 (option or accessory) for outdoor air management. The damper position is controlled directly by the RTU Open control;

EconoMi$er2 has no internal logic device.

Outdoor air management functions can be enhanced with field--installation of these accessory control devices:

Enthalpy control (outdoor air or differential sensors)

Space CO

2 sensor

Outdoor air CO

2 sensor

32

Field Connections

Field connections for accessory sensors and input devices are made the RTU Open, at plugs J1, J2, J4, J5, J11 and

J20. All field control wiring that connects to the RTU

Open must be routed through the raceway built into the corner post as shown in Fig. 24. The raceway provides the

UL required clearance between high-- and low--voltage wiring. Pass the control wires through the hole provided in the corner post, then feed the wires thorough the raceway to the RTU Open. Connect to the wires to the removable

Phoenix connectors and then reconnect the connectors to the board.

Space Temperature (SPT) Sensors —

There are two types of SPT sensors available from Carrier, resistive input non-communicating (T55, T56, and T59) and Rnet communicating (SPS, SPPL, SPP, and SPPF) sensors. Each type has a variety of options consisting of: timed override button, set point adjustment, a LCD screen, and communication tie in. Space temperature can be also be written to from a building network or zoning system. However, it is still recommended that return air duct sensor be installed to allow stand-alone operation for back-up. Refer to the configuration section for details on controller configurations associated with space sensors.

S 33ZCT55SPT, space temperature sensor with override button (T--55)

S 33ZCT56SPT, space temperature sensor with override button and setpoint adjustment (T--56)

S 33ZCT59SPT, space temperature sensor with LCD

(liquid crystal display) screen, override button, and setpoint adjustment (T--59)

Use 20 gauge wire to connect the sensor to the controller.

The wire is suitable for distances of up to 152 m (500 ft.)

Use a three--conductor shielded cable for the sensor and setpoint adjustment connections.

If the setpoint adjustment (slidebar) is not required, then an unshielded,

18 or 20 gauge, two--conductor, twisted pair cable may be used.

Connect T--55: See Fig. 33 for typical T--55 internal connections. Connect the T--55 SEN terminals to RTU

Open J20--1 and J20--2. See Fig. 49.

SEN J20-1

SEN J20-2

Fig. 49 -- RTU Open T--55 Sensor Connections

C08460

Connect T--56: See Fig. 35 for T--56 internal connections.

Install a jumper between SEN and SET terminals as illustrated. Connect T--56 terminals to RTU Open J20--1,

J20--2 and J20--3 per Fig. 50.

SEN

SEN J20-2

Jumper

SET

SET J20-3

Fig. 50 -- RTU Open T--56 Sensor Connections

C08461

Connect T--59: The T--59 space sensor requires a separate, isolated power supply of 24 VAC. See Fig. 51 for internal connections at the T--59. Connect the SEN terminal (BLU) to RTU Open J20--1. Connect the COM terminal (BRN) to J20--2. Connect the SET terminal (STO or BLK) to J20--3.

BLK (STO)

J20-3

BRN (COM)

BLU (SPT)

J20-2

SENSOR

WIRING

J20-1

OR SET SEN

OPB COM- PWR+

J20-1

24 VAC

POWER

WIRING

NOTE: Must use a separate isolated transformer.

C10291

Fig. 51 -- Space Temperature Sensor Typical Wiring

(33ZCT59SPT)

Indoor Air Quality (CO

2

) Sensor —

The indoor air quality sensor accessory monitors space carbon dioxide (CO

2

) levels. This information is used to monitor IAQ levels. Several types of sensors are available, for wall mounting in the space or in return duct, with and without LCD display, and in combination with space temperature sensors. Sensors use infrared technology to measure the levels of CO

2 present in the space air.

The CO

2 sensors are all factory set for a range of 0 to

2000 ppm and a linear mA output of 4 to 20. Refer to the instructions supplied with the CO typical CO

2

2 sensor wiring schematic.

sensor for electrical requirements and terminal locations. See Fig. 38 for

To accurately monitor the quality of the air in the conditioned air space, locate the sensor near a return--air grille (if present) so it senses the concentration of CO

2 leaving the space. The sensor should be mounted in a location to avoid direct breath contact.

33

Do not mount the IAQ sensor in drafty areas such as near supply ducts, open windows, fans, or over heat sources.

Allow at least 0.9 m (3 ft) between the sensor and any corner. Avoid mounting the sensor where it is influenced by the supply air; the sensor gives inaccurate readings if the supply air is blown directly onto the sensor or if the supply air does not have a chance to mix with the room air before it is drawn into the return airstream.

Wiring the Indoor Air Quality Sensor: For each sensor, use two 2--conductor 18 AWG (American Wire Gage) twisted--pair cables (unshielded) to connect the separate isolated 24 vac power source to the sensor and to connect the sensor to the RTU Open control board terminals.

To connect the sensor to the control, identify the positive

(4 to 20 mA) and ground (SIG COM) terminals on the sensor. See Fig. 38. Connect the 4--20 mA terminal to

RTU Open J4--2 and connect the SIG COM terminal to

RTU Open J4--3. See Fig. 52.

IAQ Sensor

4-20mA J4-2

SIG COM J4-3

24 VAC

Fig. 52 -- RTU Open / Indoor CO

2

(33ZCSENCO2) Connections

Sensor

C10738

Outdoor Air Quality Sensor

(PNO 33ZCSENCO2 plus weatherproof enclosure) —

The outdoor air CO

2 sensor is designed to monitor carbon dioxide (CO

2

) levels in the outside ventilation air and interface with the ventilation damper in an HVAC system.

The OAQ sensor is packaged with an outdoor cover. See

Fig. 40. The outdoor air CO

2 sensor must be located in the economizer outside air hood.

Wiring the Outdoor Air CO

2

Sensor: A dedicated power supply is required for this sensor. A two--wire cable is required to wire the dedicated power supply for the sensor. The two wires should be connected to the power supply and terminals 1 and 2.

To connect the sensor to the control, identify the positive

(4 to 20 mA) and ground (SIG COM) terminals on the

OAQ sensor. See Fig. 38. Connect the 4 to 20 mA terminal to RTU Open J4--5. Connect the SIG COM terminal to RTU Open J4--6. See Fig. 53.

OAQ Sensor/RH Sensor

4-20mA J4-5

SIG COM J4-6

24 VAC

Fig. 53 -- RTU Open / Outdoor CO

2

(33ZCSENCO2) Connections

Sensor

C10739

On 50TC--D units equipped with factory--installed Smoke

Detector(s), the smoke detector controller implements the unit shutdown through its NC contact set connected to the unit’s CTB input. The FSD function is initiated via the smoke detector’s Alarm NO contact set. The RTU Open controller communicates the smoke detector’s tripped status to the BAS building control. See Fig. 48, the RTU

Open System Control Wiring diagram.

The Fire Shutdown Switch configuration,

MENU→Config→Inputs→input 5, identifies the normally open status of this input when there is no fire alarm.

Connecting Discrete Inputs —

Filter Status: The filter status accessory is a field--installed accessory. This accessory detects plugged filters. When installing this accessory, the unit must be configured for filter status by setting

MENU→Config→Inputs→input 3, 5, 8, or 9 to Filter

Status and normally open (N/O) or normally closed (N/C).

Input 8 or 9 is recommended for easy of installation. Refer to Fig. 47 and Fig. 48 for wire terminations at J5.

Fan Status: The fan status accessory is a field--installed accessory. This accessory detects when the indoor fan is blowing air. When installing this accessory, the unit must be configured for fan status by setting

MENU→Config→Inputs→input 3, 5, 8, or 9 to Fan

Status and normally open (N/O) or normally closed (N/C).

Input 8 or 9 is recommended for easy of installation. Refer to Fig. 47 and Fig. 48 for wire terminations at J5.

Remote Occupancy: The remote occupancy accessory is a field--installed accessory. This accessory overrides the unoccupied mode and puts the unit in occupied mode.

When installing this accessory, the unit must be configured for remote occupancy by setting

MENU→Config→Inputs→input 3, 5, 8, or 9 to Remote

Occupancy and normally open (N/O) or normally closed

(N/C).

Also set MENU→Schedules→occupancy source to DI on/off. Input 8 or 9 is recommended for easy of installation. Refer to Fig. 47 and Table 8 for wire terminations at J5.

Power Exhaust (output): The relay used by the RTU

Open board to control power exhaust is a dry contact which means it does not have 24vac. This 24vac must be connected to the relay to allow it to operate the power exhaust relay in the PE accessory. A 24vac source must be provided to J11--2 on the RTU Open control board. This can be provided by the unit’s transformer from various sources. The “R” terminal on the unit’s low voltage terminal board (LVTB) is a logical source. Refer to Fig.

47 and Fig. 48 for wire terminations at J11.

Space Relative Humidity Sensor: The RH sensor is not used with 50Hz 50TC--D models at this time.

34

Communication Wiring -- Protocols

General —

Protocols are the communication languages spoken by control devices. The main purpose of a protocol is to communicate information in the most efficient method possible. Different protocols exist to provide different kinds of information for different applications. In the BAS application, many different protocols are used, depending on manufacturer. Protocols do not change the function of a controller; just make the front end user different.

The RTU Open can be set to communicate on four different protocols: BACnet, Modbus, N2, and LonWorks.

Switch 3 (SW3) on the board is used to set protocol and baud rate. Switches 1 and 2 (SW1 and SW2) are used to set the board’s network address. See Fig. 54 and 55 for protocol switch settings and address switches. The 3rd party connection to the RTU Open is through plug J19.

See Fig. 56 for wiring.

NOTE: Power must be cycled after changing the SW1--3 switch settings.

Refer to the RTU Open Controller Integration Guide

(Catalog No. 11--808--428--01) for more detailed information on protocols, 3rd party wiring, and networking.

PROTOCOL

BACnet MS/TP

(Master)

Modbus

(Slave)

N2

(Slave)

LonWorks

DS8

Unused

Unused

Unused

Unused

NOTE:

DS = Dip Switch

BACnet MS/TP SW3 example shown

DS7

OFF

OFF

OFF

ON

BAUD RATE

9600

19,200

38,400

76,800

Baud Rate Selections

DS2

OFF

ON

OFF

ON

SW3 Protocol Selection

DS6

OFF

DS5

OFF

OFF

OFF

ON

ON

OFF

OFF

DS4

ON

ON

ON

ON

DS1

OFF

OFF

ON

ON

Fig. 54 -- RTU Open SW3 Dip Switch Settings

DS3

OFF

OFF

ON

OFF

DS2 DS1

Select Baud Select Baud

Select Baud Select Baud

OFF

OFF

OFF

OFF

C07166

Fig. 55 -- RTU Open Address Switches

C10815

Fig. 56 -- Network Wiring

C10816

35

Local Access —

BACview 6 Handheld: The BACview 6 is a keypad/display interface used to connect to the RTU Open to access the control information, read sensor values, and test the RTU, see Fig. 57. This is an accessory interface that does not come with the RTU Open controller and can only be used at the unit. Connect the BACview 6 to the RTU Open J12 local access port. There are two password protected levels in the display (User and Admin). The user password is defaulted to 0000 but can be changed. The Admin password is 1111 and cannot be changed. There is a 10 minute auto logout if a screen is idle. See Form

48--50HCTQ--01T, Appendix A for navigation and screen content.

Virtual BACview: Virtual BACview is a freeware computer program that functions as the BACview 6 Handheld. The

USB Link interface (USB--L) is required to connect a computer to the RTU Open board. The link cable connects a USB port to the J12 local access port. This program functions and operates identical to the handheld.

RTU Open Troubleshooting —

Communication LEDs: The LEDs indicate if the controller is speaking to the devices on the network. The

LEDs should reflect communication traffic based on the baud rate set. The higher the baud rate the more solid the

LEDs will appear. See Table 9.

Cable

Access Port

P1 P1

J12

P5 P5

Protocol Selector

RTU Open

BACview 6 Local Access Cable

Fig. 57 -- BACview 6 Handheld Connections

C10812

36

Table 9 – LEDs

The LEDs on the RTU Open Control Board (see Fig. 47) show the status of certain functions:

If this LED is on...

Power

Rx

Tx

DO#

Status is...

RTU Open has power

RTU Open is receiving data from the network segment

RTU Open is transmitting data over the network segment

The digital output is active

If Run LED shows...

2 flashes per second

2 flashes per second

2 flashes per second

2 flashes per second

2 flashes per second

5 flashes per second

5 flashes per second

7 flashes per second

14 flashes per second

On

The Run and Error LEDs indicate control module and network status

And Error LED shows...

Off

2 flashes, alternating with Run LED

3 flashes, then off

4 flashes, then pause

Status is...

Normal

Five minute auto---restart delay after system error

Control module has just been formatted

On

On

Off

7 flashes per second, alternating with

Run LED

14 flashes per second, alternating with Run LED

Two or more devices on this network have the same ARC156 network address

Exec halted after frequent system errors or control programs halted

Exec start---up aborted, Boot is running

Firmware transfer in progress, Boot is running

Ten second recovery period after brownout

On

Brownout

Failure. Try the following solutions:

S

Turn RTU Open off, then on.

S

Format RTU Open.

S

Download memory to RTU Open.

S

Replace RTU Open.

NOTE: Refer to Catalog No. 48--50HCTQ--01T for complete configuration of RTU Open, operating sequences and troubleshooting information. Refer to RTU Open

Controller Integration Guide (Catalog No. 11--808--428--01) for details on configuration and troubleshooting of connected networks. Have a copy of these manuals available at unit start--up.

Outdoor Air Enthalpy Control

(PNO 33CSENTHSW) --

The enthalpy control (33CSENTHSW) is available as a field--installed accessory to be used with the EconoMi$er2 damper system. The outdoor air enthalpy sensor is part of the enthalpy control. (The separate field--installed accessory return air enthalpy sensor (33CSENTSEN) is required for differential enthalpy control. See Fig. 58.)

Locate the enthalpy control in the economizer next to the

Actuator Motor. Locate two GRA leads in the factory harness and connect the gray lead labeled “ESL” to the terminal labeled “LOW”. See Fig. 58. Connect the enthalpy control power input terminals to economizer actuator power leads RED (connect to 24V) and BLK

(connect to GND).

Enthalpy

Switch

24V

GND

RED

BLK

PL6-1 (24-V)

PL6-4 (COM)

LOW GRA 7 CTB ECON

(P’LINK: to J4-2) or

(RTU Open: to J2-6)

Factory Wiring Harness

C11160

Fig. 58 -- Enthalpy Switch (33CSENTHSW) Connections

The outdoor enthalpy changeover setpoint is set at the enthalpy controller.

Differential Enthalpy Control —

Differential enthalpy control is provided by sensing and comparing the outside air and return air enthalpy conditions. Install the outdoor air enthalpy control as described above. Add and install a return air enthalpy sensor (see Fig. 59).

37

24V

– 4-20

Main

+ VDC

Out

GND

LOW

Outside Air

Enthalpy Switch

RED

BLK

GRA

PL6-1 (24-V)

7

PL6-4 (COM)

CTB ECON

(P’LINK: to J4-2) or

(RTU Open: to J2-6)

Return Air Sampling Tube

(Shipping Location)

+ 24-36

VDC In

– 4-20 Main

Out

Return Air

Enthalpy

Sensor

C11161

Fig. 59 -- Outside and Return Air Enthalpy Sensor

Wiring

To wire the return air enthalpy sensor, perform the following:

1. Use a 2--conductor, 18 or 20 AWG, twisted pair cable to connect the return air enthalpy sensor to the enthalpy controller.

2. Connect the field--supplied RED wire to (+) spade connector on the return air enthalpy sensor and the (+) terminal on the enthalpy controller. Connect the BLK wire to (--) spade connector on the return air enthalpy sensor and the (--) terminal on the enthalpy controller.

Smoke Detectors

Smoke detectors are available as factory--installed options on 50TC--D models. Smoke detectors may be specified for

Supply Air only or for Return Air without or with economizer or in combination of Supply Air and Return

Air. Return Air smoke detectors are arranged for vertical return configurations only. The unit is factory--configured for immediate smoke detector shutdown operation; additional wiring or modifications to unit terminal board may be necessary to complete the unit and smoke detector configuration to meet project requirements.

Return Air Sensor Tube Installation –

The return air sampling tube is shipped in the unit’s supply fan section, attached to the blower housing (see Fig. 60). Its operating location is in the return air section of the unit (see

Fig. 61, unit without economizer, or Fig. 62, unit with economizer), inserted into the return air sensor module housing which protrudes through the back of the control box.

ROT

ATION

C09102

Fig. 60 -- Typical Supply Air Smoke Detector Sensor

Location

Return Air Detector

Sampling Tube

Fig. 61 -- Return Air Sampling Tube Location

C09135 in Unit without Economizer

38

Return Air Detector

Sampling Tube

Fig. 62 -- Return Air Sampling Tube Location in Unit with Economizer

C09136

To install the return air sensor sampling tube:

1. Remove the tube from its shipping location.

2. Open the unit end to access the return air sensor (located on right--hand partition)

3. Orient the tube’s sampling holes into the return air flow direction. For vertical application, position the sampling holes on the bottom of the tube, facing into the bottom return duct opening. For horizontal application, position the sampling holes on the side of the tube, facing the unit’s end panel.

4. Insert the sampling tube into the return air sensor module’s forward or rear opening until the tube snaps into position.

5. Replace end panel or outside air hood.

Return Air Sensor Exhaust Tube Installation —

The exhaust tube is shipped in a bag located in the control box. The exhaust tube is 152 mm (6 inches) long with a base coupling and a gasket. Slip the gasket over the coupling end, then insert the connector into the rear opening in the sensor module until the tube snaps into location.

NOTE: The shipping bag contains a tube plug or cap.

This part is not used in this installation and may be discarded. Do NOT insert the plug into the exhaust tube.

Test/Reset Magnet —

The shipping bag also contains a magnet for testing and resetting smoke detectors. Do not discard this magnet.

Additional Application Data —

Refer to Catalog No. HKRNKA--1XA for discussions on additional control features of these smoke detectors including multiple unit coordination.

39

Table 10 – Unit Wire/Fuse or HACR Breaker Sizing Data

ELEC. HTR { P.E.

NO P.E.

CRHEATER***A00

VERTICAL

283A00

284A00

NONE

282A00

283A00

284A00

NONE

284A00

NONE

282A00

283A00

284A00

NONE

282A00

NONE

282A00

283A00

284A00

NONE

282A00

283A00

284A00

NONE

282A00

283A00

284A00

NONE

282A00

283A00

282A00

283A00

284A00

NONE

282A00

283A00

284A00

NONE

282A00

283A00

284A00

NONE

282A00

283A00

284A00

NONE

282A00

283A00

284A00

HORIZONTAL

274A00

275A00

NONE

273A00

274A00

275A00

NONE

275A00

NONE

273A00

274A00

275A00

NONE

273A00

NONE

273A00

274A00

275A00

NONE

273A00

274A00

275A00

NONE

273A00

274A00

275A00

NONE

273A00

274A00

273A00

274A00

275A00

NONE

273A00

274A00

275A00

NONE

273A00

274A00

275A00

NONE

273A00

274A00

275A00

NONE

273A00

274A00

275A00

Nom

(kW)

FLA MCA

LRA

253

253

262

262

262

262

262

249

253

253

253

253

253

253

249

249

249

249

253

253

240

240

240

240

253

253

249

249

249

303

285

285

285

285

262

262

262

303

303

303

285

285

285

285

326

326

326

326

FLA

69

98

51

51

66

95

54

92

48

48

66

95

51

51

44

44

63

92

48

48

43

43

62

90

66

95

44

44

63

106

55

55

66

95

54

69

98

61

61

77

58

58

69

98

66

66

77

106

FUSE or

HACR

BRKR

80

100

60

60

80

100

60

90

60

60

80

100

60

60

50

50

70

90

60

60

50

50

70

90

80

100

50

50

70

110

60

60

80

100

60

80

100

70.0

70

90

60

60

80

100

80

80

90

110

34.7

52.1

---

17.4

34.7

52.1

---

52.1

---

17.4

34.7

52.1

---

17.4

---

17.4

34.7

52.1

---

17.4

---

17.4

34.7

52.1

34.7

52.1

---

17.4

34.7

52.1

---

17.4

34.7

52.1

17.4

34.7

52.1

---

17.4

34.7

---

17.4

34.7

52.1

---

17.4

34.7

52.1

FLA

50.1

75.2

---

25.1

50.1

75.2

---

75.2

---

25.1

50.1

75.2

---

25.1

---

25.1

50.1

75.2

---

25.1

---

25.1

50.1

75.2

50.1

75.2

---

25.1

50.1

75.2

---

25.1

50.1

75.2

25.1

50.1

75.2

---

25.1

50.1

---

25.1

50.1

75.2

---

25.1

50.1

75.2

3.1

3.1

3.1

3.1

3.1

3.1

3.1

3.1

3.1

3.1

3.1

3.1

75.4

88.0

48.8

48.8

72.1

84.7

51.4

80.7

45.6

45.6

72.1

84.7

48.2

48.2

42.4

42.4

68.1

80.7

45.6

45.6

41.4

41.4

66.9

79.5

72.1

84.7

42.4

42.4

68.1

96.2

52.7

52.7

72.1

84.7

51.4

75.4

88.0

58.0

58.0

83.6

55.3

55.3

75.4

88.0

61.9

61.9

83.6

96.2

DISC. SIZE

MCA w/ P.E. (pwrd fr/unit)

DISC. SIZE

FUSE or

HACR

BRKR

90

100

60

60

80

100

70

100

60

60

80

100

60

60

60

60

80

100

60

60

60

60

80

90

80

100

60

60

80

110

70

70

80

100

70

90

100

80

80

100

80

80

90

100

80

80

100

110

FLA

76

105

58

58

73

102

61

99

55

55

73

102

58

58

51

51

70

99

55

55

50

50

69

98

73

102

51

51

70

113

62

62

73

102

61

76

105

68

68

84

65

65

76

105

73

73

84

113

LRA

265

265

274

274

274

274

274

261

265

265

265

265

265

265

261

261

261

261

265

265

252

252

252

252

265

265

261

261

261

315

297

297

297

297

274

274

274

315

315

315

297

297

297

297

338

338

338

338

83.1

95.7

55.0

55.0

79.9

92.5

57.6

88.5

51.8

51.8

79.9

92.5

54.4

54.4

48.6

48.6

75.9

88.5

51.8

51.8

47.6

47.6

74.6

87.2

79.9

92.5

48.6

48.6

75.9

104.0

58.9

58.9

79.9

92.5

57.6

83.1

95.7

64.2

64.2

91.4

61.5

61.5

83.1

95.7

68.1

68.1

91.4

104.0

NOTE: See page 41 for table legend and notes.

40

CRHEATER***A00

VERTICAL

NONE

282A00

283A00

284A00

NONE

282A00

283A00

284A00

NONE

282A00

283A00

284A00

Legend and Notes for Table 10

LEGEND:

BRKR --Circuit breaker

DISC --Disconnect

FLA --Full load amps

IFM --Indoor fan motor

LRA --Locked rotor amps

MCA --Minimum circuit amps

PE --Power exhaust

HORIZONTAL

NONE

273A00

274A00

275A00

NONE

273A00

274A00

275A00

NONE

273A00

274A00

275A00

Nom

(kW)

---

17.4

34.7

52.1

---

17.4

---

17.4

34.7

52.1

34.7

52.1

Table 10 -- Unit Wire/Fuse or HACR Breaker Sizing Data (cont)

ELEC. HTR { P.E.

NO P.E.

w/ P.E. (pwrd fr/unit)

DISC. SIZE DISC. SIZE

FLA

---

25.1

50.1

75.2

---

25.1

---

25.1

50.1

75.2

50.1

75.2

FLA MCA

3.1

3.1

3.1

70.7

70.7

83.6

96.2

71.1

71.1

64.1

64.1

75.4

88.0

84.1

96.7

FUSE or

HACR

BRKR

90

90

90

110

90

90

80

80

80

100

90

110

LRA

374

374

374

374

392

392

333

333

333

333

392

392

FLA

75

75

77

106

75

75

67

67

69

98

77

106

MCA

70.3

70.3

83.1

95.7

76.9

76.9

91.4

104.0

77.3

77.3

91.9

104.5

FUSE or

HACR

BRKR

90

90

100

110

90

90

90

90

90

100

100

110

FLA

82

82

84

113

83

83

75

75

76

105

85

113

LRA

386

386

386

386

404

404

345

345

345

345

404

404

{ Heater capacity (kW) is based on heater voltage of 400 v. If power distribution voltage to unit varies from rated heater voltage, heater kW will vary accordingly.

NOTES:

1. In compliance with NEC requirements (U.S.A. Standard) for multimotor and combination load equipment (refer to NEC

Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or HACR breaker.

2. MCA calculation for units with electric heaters over 50 kW =

(1.25 x IFM amps) + (1.00 x heater FLA).

41

Economizer 2 Position Damper

Unit Without Economizer or

2 Position Damper

C10645

Fig. 63 -- EconoMi$ert IV Wiring

Step 12 — Adjust Factory--Installed Options

EconoMi$er IV Occupancy Switch —

Refer to Fig. 63 for general EconoMi$er IV wiring.

External occupancy control is managed through a connection on the Central Terminal Board.

If external occupancy control is desired, connect a time clock or remotely controlled switch (closed for Occupied, open for Unoccupied sequence) at terminals marked

OCCUPANCY on CTB. Remove or cut jumper JMP 2 to complete the installation.

Step 13 — Install Accessories

Available accessories include:

Roof Curb

Thru--base connection kit (must be installed before unit is set on curb)

Manual outside air damper

Two--Position motorized outside air damper

EconoMi$er IV (with control and integrated barometric relief)

EconoMi$er2 (without control/for external signal and integrated barometric relief)

Power Exhaust

Differential dry--bulb sensor (EconoMi$er IV)

Outdoor enthalpy sensor

Differential enthalpy sensor

Electric Heaters

Single Point kits

Thermostat / Sensors

CO

2 sensor

DDC interface (PremierLink)

Louvered hail guard

Phase monitor control

Refer to separate installation instructions for information on installing these accessories.

Pre--Start and Start--Up

This completes the mechanical installation of the unit.

Refer to the unit’s Service and Maintenance manual for detailed Pre--Start and Start--up instructions.

Copyright 2011 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231 Printed in U.S.A.

Edition Date: 08/11

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

42

Catalog No: 50TC---C06SI

Replaces: 50TC--- C05SI

I.

PRELIMINARY INFORMATION

MODEL NO.:

DATE:

START-UP CHECKLIST

(Remove and Store in Job File)

SERIAL NO.:

TECHNICIAN:

II. PRE-START-UP (insert checkmark in box as each item is completed)

j VERIFY THAT JOBSITE VOLTAGE AGREES WITH VOLTAGE LISTED ON RATING PLATE j VERIFY THAT ALL PACKAGING MATERIALS HAVE BEEN REMOVED FROM UNIT j REMOVE ALL SHIPPING HOLD DOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS j VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS j CHECK REFRIGERANT PIPING FOR INDICATIONS OF LEAKS; INVESTIGATE AND REPAIR IF NECESSARY j CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS j CHECK THAT RETURN (INDOOR) AIR FILTERS ARE CLEAN AND IN PLACE j VERIFY THAT UNIT INSTALLATION IS LEVEL j CHECK FAN WHEELS AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW

TIGHTNESS j CHECK TO ENSURE THAT ELECTRICAL WIRING IS NOT IN CONTACT WITH REFRIGERANT LINES

OR SHARP METAL EDGES j CHECK PULLEY ALIGNMENT AND BELT TENSION PER INSTALLATION INSTRUCTIONS

III. START-UP (REFER TO UNIT SERVICE/MAINTENANCE MANUAL FOR START--UP

INSTRUCTIONS)

ELECTRICAL

SUPPLY VOLTAGE

CIRCUIT 1 COMPRESSOR AMPS

CIRCUIT 2 COMPRESSOR AMPS

INDOOR-FAN AMPS

L1-L2

L1

L1

L2-L3

L2

L2

L3-L1

L3

L3

TEMPERATURES

OUTDOOR-AIR TEMPERATURE

RETURN-AIR TEMPERATURE

COOLING SUPPLY AIR

PRESSURES (Cooling Mode)

REFRIGERANT SUCTION, CIRCUIT 1

REFRIGERANT SUCTION, CIRCUIT 2

REFRIGERANT DISCHARGE, CIRCUIT 1

REFRIGERANT DISCHARGE, CIRCUIT 2

DB

DB

DB kPa kPa kPa

OR kPa

WB

WB

WB

PSIG

PSIG

PSIG

PSIG

_ C

_ C

_ C

OR

_ C

_ F

_ F

_ F

_ F j VERIFY THAT 3-PHASE FAN MOTOR AND BLOWER ARE ROTATING IN CORRECT DIRECTION.

j VERIFY THAT 3-PHASE SCROLL COMPRESSOR IS ROTATING IN THE CORRECT DIRECTION j VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS

GENERAL j SET ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO MATCH JOB REQUIREMENTS

(IF EQUIPPED)

43

Copyright 2011 Carrier Corp. D 7310 W. Morris St. D Indianapolis, IN 46231 Printed in U.S.A.

Edition Date: 08/11

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

44

Catalog No: 50TC---C06SI

Replaces: 50TC--- C05SI