ETL MUA Controls Installation, Operation And Maintenance Manual

MUA Controls

Standard and Modular/Recirculating Direct Fired Heaters

Installation, Operation, and Maintenance Manual

Modular Direct Fired Heater

Direct Fired Heater

Modular Direct Fired Recirculating Heater

FOR YOUR SAFETY

IF YOU SMELL GAS: OPEN WINDOWS, DO NOT TOUCH ELECTRICAL SWITCHES, EXTINGUISH

ANY OPEN FLAMES, IMMEDIATELY CALL YOUR GAS SUPPLIER.

RECEIVING AND INSPECTION

Upon receiving unit, check for any interior and exterior damage. If damage is found, report it immediately to the carrier. Check that all accessory items are accounted for and free of damage.

WARNING!

Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury, or death. Read the installation, operating, and maintenance instructions thoroughly before installing or servicing this equipment. ALWAYS disconnect power and gas before working on heater.

Save these instructions . This document is the property of the owner of this equipment and is required for future maintenance. Leave this document with the owner when installation or service is complete.

A003303 7

October 2020 Rev. 01

Table of Contents

WARRANTY .......................................................... 3

Listings ................................................................ 3

Patents ................................................................ 3

INSTALLATION ..................................................... 4

Mechanical .......................................................... 4

Curb and Ductwork ............................................. 7

Roof Mount Installation ................................... 9

Installation with Exhaust Fan .......................... 9

Duct Mount Installation .................................. 10

Indoor (Inline) Installation .............................. 10

Roof Mount Installation - Recirculation Unit .. 11

Indoor (Inline) Installation Recirculation Unit . 11

Heat Module Add-On Installation .................. 12

Gas ................................................................... 13

HMI and Remote Room Sensor Installation ...... 15

Make-up Air (MUA) Board Connectors ............. 16

ELECTRICAL ...................................................... 26

Fan to Building Wiring Connection .................... 27

Temperature Control ......................................... 28

ECM Speed Control .......................................... 28

External PWM Signal ........................................ 28

OPERATION ....................................................... 29

Accessing Menu Configurations ....................... 29

Remote (HMI) Control Panel ......................... 29

HMI Notification Letters ................................. 29

HMI Configuration Menu ................................... 30

Communication ............................................. 30

Advanced Options ......................................... 30

Status ............................................................ 30

About ............................................................. 30

Scheduling ........................................................ 31

Fan Speed and Damper Position Presets ......... 31

Unit Options ...................................................... 32

Building Signal Damper Control .................... 32

Electric Cabinet Heater ................................. 32

Motorized Intake Damper .............................. 32

Mixing Box Control Unit Options ....................... 32

Menu Descriptions ............................................ 33

Menu Tree ......................................................... 41

Variable Frequency Drive (VFD) ....................... 49

VFD Installation ............................................. 50

Input AC Power ............................................. 50

VFD Output Power ........................................ 50

VFD Programming ........................................ 51

ACTECH SMV VFD ...................................... 52

START-UP OPERATION .................................... 53

Start-up Procedure ............................................ 53

Pulley Adjustment ............................................. 54

Pulley Alignment/Proper Belt Tension .............. 55

Pulley Combination Chart ................................. 56

Air Flow Sensor ................................................. 57

Modulating Gas System .................................... 58

High Temperature Limit .................................... 58

Pilot Adjustment ................................................ 58

Main Burner Adjustment ....................................59

Final Start-up Procedure ...................................60

Sequence of Operation .....................................61

Flame Safety Control .....................................61

Components ......................................................63

Network .............................................................64

BACnet ..........................................................64

LonWorks ......................................................65

Device Instance, MAC Address, Baud Rate ..66

Changing the IP Address ...............................67

DDC Control Points ...........................................68

DDC Fault List ...................................................72

Troubleshooting .................................................73

Burner Troubleshooting ................................74

HMI Fault Codes ...............................................75

VFD Fault List ....................................................78

Resetting Unit ................................................78

MAINTENANCE ...................................................79

General Maintenance ........................................79

2 Weeks After Start-up ......................................79

Every 3 Months .................................................79

Yearly ................................................................79

Burner Maintenance ......................................80

Unit Filters .........................................................80

Emergency Shutdown of Unit ........................81

Prolonged Shutdown of Unit ..........................81

Start-Up Documentation ....................................84

2

WARRANTY

This equipment is warranted to be free from defects in materials and workmanship, under normal use and service, for a period of 2-years from date of shipment. This warranty shall not apply if:

1. The equipment is not installed by a qualified installer per the MANUFACTURER’S installation instructions shipped with the product.

2. The equipment is not installed in accordance with Federal, State, and Local codes/regulations.

3. The equipment is misused or neglected, or not maintained per the MANUFACTURER’S maintenance instructions.

4. The equipment is not installed and operated within the limitations set forth in this manual.

5. The invoice is not paid within the terms of the sales agreement.

The MANUFACTURER shall not be liable for incidental and consequential losses and damages potentially attributable to malfunctioning equipment. Should any part of the equipment prove to be defective in material or workmanship within the 2-year warranty period, upon examination by the MANUFACTURER, such part will be repaired or replaced by MANUFACTURER at no charge. The BUYER shall pay all labor costs incurred in connection with such repair or replacement. Equipment shall not be returned without

MANUFACTURER’S prior authorization, and all returned equipment shall be shipped by the BUYER, freight prepaid to a destination determined by the MANUFACTURER.

NOTE: To receive warranty coverage for this product, copy and print out the “Start-Up

Documentation” on page 84. Fill in all required information. Fax the page to 1-919-516-8710 or call

1-866-784-6900 for email information.

Listings

This unit is ETL-listed to the American National Standard/CSA Standard for Gas Unit Heaters And Gas-

Fired Duct Furnaces ANSI Z83.4, CSA 3.7.

The Safety Control Board is ETL-listed to standard UL 60730-2-9, UL 60730-1, CSA E60730-1, CSA

E60730-2-9.

Patents

The Direct Gas Fired Make-Up Air Profile Plates is covered under the following patent: Heated Make-Up

Air System: United States Patent No. 6629523 B2.

3

INSTALLATION

It is imperative that this unit is installed and operated with the designed airflow and electrical supply in accordance with this manual. If there are any questions about any items, please call the service department at 1-866-784-6900 for warranty and technical support issues.

Mechanical

WARNING: DO NOT RAISE UNIT BY THE INTAKE HOOD, BLOWER, MOTOR SHAFT, OR

BEARINGS. USE ALL LIFTING LUGS PROVIDED WITH A SPREADER BAR OR SLING UNDER THE

UNIT.

Clearance

The top, back, and front surfaces of this heater may not be installed less than 6” from combustible materials. The heater base may be installed on combustible surfaces. Allow 24” minimum service clearance on both sides of this heater.

Site Preparation

Figure 1 - Spreader Bar

1. Provide clearance around installation site to safely rig and

lift equipment into its final position ( Figure 1 ). Supports

must adequately support equipment. Refer to manufacturer’s estimated weights.

2. Locate unit close to the space it will serve to reduce long, twisted duct runs.

3. Consider general service and installation space when locating unit.

4. Do not allow air intake to face prevailing winds. Support unit above ground or at roof level high enough to prevent precipitation from being drawn into its inlet. The inlet must also be located at least 10 feet away from any exhaust vents. The fan inlet shall be located in accordance with the applicable building code provisions for ventilation air.

5. All air to the heater must be ducted from the outdoors.

Recirculation of room air is not permitted. If in doubt regarding the application, consult the manufacturer.

6. Recirculation of room air may be hazardous in the presence of:

• Flammable solids, liquids, and gases

• Explosive materials (e.g., grain dust, coal dust, gun powder, etc.)

• Substances which may become toxic when exposed to heat (e.g, refrigerants, aerosols, etc.)

7. Recirculation is not recommended in uninsulated buildings where outside temperatures fall below 32 ° F (0°C).

8. Excessive recirculation or insufficient ventilation air, which results in inadequate dilution of the combustion products generated by the heater, may create hazardous concentrations of carbon dioxide, carbon monoxide, nitrogen dioxide, and other combustion products in the heated space. Refer to Table 1 for ventilation requirements.

Spreader

Bar

Lifting Lugs

Lifting Lugs

4

9. If gas fork trucks or other fossil fuel powered equipment are utilized in the conditioned area, additional ventilation requirements for the facility must be addressed separately.

10. If the heater utilizes room sensors for limiting room CO

2

concentration:

• The CO

2 control set-point shall be no greater than the maximum allowable room concentration of

5000 ppm less the sensor’s published accuracy tolerance. The control shall prevent the CO

2 concentration in room air from exceeding 5000 ppm.

• A minimum of one sensor shall be installed per room served by the heater.

• When a room area, served by a single heater, does not exceed 10,000 ft 2 (929 m 2 ) and height does not exceed 20 ft. (6 m), a duct sensor may be installed in the return air opening of the heater.

• Sensors shall be calibrated per the sensor manufacturer’s recommended procedure and frequency or annually, whichever is more frequent.

• Each heater shall require CO

2

sensor(s).

• Sensors shall not be placed near sources of CO

2

.

%

Natural

Gas

Propane

Gas

Table 1 - Minimum Ventilation Requirements for Heaters that Recirculate

5

12.2

(6.8)

10.6

(5.9)

Minimum Ventilation Rate (as % of Total Air Throughput)

10 15 20 25 30 40

Maximum Equivalent Temp. Rise Through Heat for CO 2 °F (°C)

24.5

(13.6)

21.1

(11.7)

36.7

(20.4)

31.7

(17.6)

49.0

(27.2)

42.2

(23.5)

61.2

(34.0)

52.8

(29.3)

73.5

(40.8)

63.4

(35.2)

98.0

(54.4)

84.5

(46.9)

50

122.5

(68.0)

105.6

(58.7)

60

146.9

(81.6)

126.7

(70.4)

5

Intake Assembly

Intakes and curbs ( Figure 2

) are shipped on a separate skid. Upon unit arrival, perform the following steps to assemble the intake to the unit.

1. Apply silicone or weather-proof gasket on the backside of the flanges of the intake hood or V-bank intake.

2. Secure the flanges of the intake hood to the unit with the supplied sheet metal screws.

3. Use caulk on the outside of the screws to prevent water leaks.

4. If the unit is a modular unit with a V-bank or evaporative cooler section, the V-bank or evaporative cooler will bolt to the heater with the bolts provided.

5. Slide the filters down the filter track.

Figure 2 - Intake and Curb Assembly

Direct Fired

1

2

3

4

Direct Fired Recirc

1

2

3

1. Unit

2. Intake Housing

3. Intake Filter(s)

4

5

4. Curb

5. Mixing Box Curb

6

Curb and Ductwork

This fan was specified for a specific CFM and static pressure. The ductwork attached to this unit will significantly affect airflow performance. When using rectangular ductwork, elbows must be radius throat, radius back with turning vanes. Flexible ductwork and square elbows should not be used. Any transitions and/or turns in the ductwork near the fan outlet will cause system effect. System effect will drastically increase the static pressure and reduce airflow.

•

Table 3 on page 8 displays the minimum fan outlet duct sizes and straight lengths required for optimal

fan performance. Table 2 displays recommended return ductwork sizes for recirculating units.

• Do not use the unit to support ductwork in any way. This may cause damage to the unit.

• Follow SMACNA guides and manufacturer's requirements for the remaining duct run. Fans designed for rooftop installation should be installed on a prefabricated or factory-built roof curb.

• Follow curb manufacturer’s instructions for proper curb installation.

• The unit should be installed on a curb and/or rail that meets local code height requirements.

• Make sure the duct connection and fan outlet are properly aligned and sealed.

• Secure fan to curb through vertical portion of the ventilator base assembly flange. Use a minimum of eight (8) lug screws, anchor bolts, or other suitable fasteners (not furnished). Shims may be required depending upon curb installation and roofing material.

• Verify all fasteners are secure.

Figure 3

through Figure 8 show different mechanical installations.

• Adequate building relief shall be provided so as not to over pressurize the building when the heating system is operating at its rated capacity. This can be accomplished by taking into account, through standard engineering methods, the structure’s designed infiltration rate; by providing properly-sized relief openings; or by interlocking a powered exhaust system; or by a combination of these methods.

• Heaters installed with intake ductwork must be purged to replace at least four air changes of the volume of the intake duct.

• If the failure or malfunction of this heater creates a hazard to other fuel-burning equipment in the building (e.g., when the heater is providing makeup air to a boiler room), the unit is to be interlocked to open inlet air dampers or other such devices.

• On outdoor installations, it is recommended that the discharge duct be insulated to prevent condensation during the “OFF” cycle in cold weather.

• Flexible connectors should be used on all ductwork connections. Vibration isolators are optional and can be supplied in the loose parts package.

• Units that are installed in airplane hangars should be installed in accordance with the Standard for

Aircraft Hangars, ANSI/NFPA 409. Units that are to be installed in public garages should be installed in accordance with the Standard for Parking Structures, ANSI/NFPA 88A, or the Standard for Repair

Garages, ANSI/NFPA 88B, and with CAN/CGA B149 Installation Codes.

Table 2 - Recommended Return Ductwork Sizes

Mixing Box

3

4

1

2

5

Duct Size (Inches)

19 x 15

25 x 24

31 x 29

37 x 34

44 x 44

7

Blower Size (Inches)

10

15D, 16Z, 18Z

12

15

20D, 20Z, 22Z

18

24D, 25Z

20

30D, 28Z

25

36D

Table 3 - Required Supply Ductwork

Discharge

Side

Up/Down

Side

Up/Down

Side

Up/Down

Side

Up/Down

Side

Up/Down

Side

Up/Down

Side

Up/Down

Side

Up/Down

Side

Up/Down

Side

Up/Down

Side

Up/Down

Duct Size

14” x 14”

20” x 20”

14” x 14”

16” x 16”

20” x 20”

26” x 26”

20” x 20”

24” x 24”

30” x 30”

24” x 24”

26” x 26”

32” x 32”

26” x 26”

32” x 32”

36” x 36”

32” x 32”

WARNING!

Failure to properly size ductwork may cause system effects and reduce the performance of the equipment.

Straight Duct Length

48”

72”

48”

54”

168”

108”

168”

189”

168”

72”

108”

72”

86”

108”

86”

108”

8

Roof Mount Installation

Note: Refer to submittal drawings for specific unit dimensions.

Figure 3 - Roof Mount Details

1. Discharge Opening

2. Curb Outer Wall

3. Flex Conduit Located in Curb Area for Field

Wiring

1

4. Intake Housing

5. Lifting Lugs

6. Direct Fired Module

7. Service Disconnect Switch

8. Blower/Motor Access Door

9. Curb (20” High)

10. Control Drop

11. Motor Drop

12. Gas Connection

Max. Roof Opening 2” Smaller than Curb

Outside Dimension.

8

3

7

2

12

6

Installation with Exhaust Fan


Figure 4 - Exhaust Fan Details

2

1

11

AIRFLOW

10

9

AIRFLOW

5

4

8

3

7

6 5

4

9

10


2. Curb Outer Wall

3. Flex Conduit Located in

Curb Area for Field Wiring

4. Intake Housing

5. Lifting Lugs



Max. Roof Opening 2” Smaller than Curb Outside Dimension.


9. Curb with Support Legs or

Rail (20” High)

10. Gas Connection

9

Duct Mount Installation


Figure 5 - Duct Mount Details

1. Control/Valve Access Door

2. Gas Connection

3. Optional Unistrut Base

4. Lifting Lugs

AIRFLOW

1

2

4

3

Indoor (Inline) Installation


1. Flex Conduit for Field Wiring

2. Optional Unistrut Base

3. Lifting Lugs

4. Control/Filter Access Door

5. Control/Valve Access Door

6. Gas Connection



Figure 6 - Indoor Installation Details

8

1

AIRFLOW

2

3

7

6

5 4

10

Roof Mount Installation - Recirculation Unit


Figure 7 - Roof Mount Details


2. Curb Outer Wall

3. Curb

4. Return Damper

5. Intake Damper

6. Intake Filter


8. Control Drop

9. Motor Drop

10. Blower/Motor Access

Door

11. Flex Conduit for Field

Wiring

12. Service Disconnect

Switch

13. Optional Filters

14. Lifting Lugs

1

9

10

11

8

2

12

13

7

AIRFLOW

3

4

4

AIRFLOW

5

6

14

Indoor (Inline) Installation Recirculation Unit


Figure 8 - Indoor Installation Details

1. Flex Conduit for Field

Wiring

2. Optional Filters

3. Return Damper

4. Intake Damper


6. Blower/Motor Access

Door

7. Service Disconnect

Switch

8. Lifting Lugs

9. Optional Uni-Strut Base

AIRFLOW

7

1

2

AIRFLOW

6 5

3

3

4

8

9

11

Heat Module Add-On Installation

Modular heat units ( Figure 9 ) that are ordered to provide heat onto an existing blower only application

require field mechanical and wiring installation.

1. Remove existing intake housing and lifting lugs from the blower section intake side.

2. Attach heat module to blower intake using the provided sheet metal screws and bolts. Tighten screws and bolts to compress the gasket between the heat module and the blower module.

3. Support and level the end of the heat module (end opposite the blower) with the provided equipment legs/rails.

4. Attach the intake housing to the intake side of the heater module.

5. Drill a hole in the discharge of the blower large enough to insert the discharge control sensor (if provided). Install the sensor through the hole.

6. Wire the sensor and coil as indicated on the supplied wiring schematic. Route all wiring through metal conduit.

7. After the add-on installation is complete, refer to

“Start-up Procedure” on page 53 .

Figure 9 - Heat Module

4

1 2

3

1. Blower


3. Intake Housing

4. Filters

7

6

5

5. Equipment Legs

6. Conduit

7. Curb

12

Gas

Installation of gas piping must conform with local building codes, or in the absence of local codes to the

National Fuel Gas Code, ANSI Z223.1 (NFPA 54) – latest edition. In Canada, installation must be in accordance with CAN/CGA-B149.1 for natural gas units and CAN/CGA-B149.2 for propane units.

WARNING: INLET GAS PRESSURE MUST NOT EXCEED PRESSURE INDICATED ON NAMEPLATE.

SEE UNIT NAMEPLATE FOR PROPER GAS SUPPLY PRESSURE AND GAS TYPE.

1. Always disconnect power before working on or near a heater. Lock and tag the disconnect switch or breaker to prevent accidental power-up.

2. Piping to the unit should conform to local and national requirements for type and volume of gas handled, and pressure drop allowed in the line. Refer to the Gas Engineer’s Handbook for gas line capacities.

3. The incoming pipe near the heater should be sized to match the connection on the outside of the unit.

Unit inlet sizes are shown in

Table 4 . The unit requires a steady supply of gas at all times, avoid

multiple taps in the gas supply line.

4. Install a ground joint union with brass seat and a manual shut-off valve external to the unit casing.

Install shut-off valve adjacent to the unit for emergency shut-off and easy servicing of controls. Refer to

Figure 10 on page 14

.

5. Provide a sediment trap, as shown in

Figure 10 on page 14 , before each unit and where low spots in

the pipeline cannot be avoided.

6. Clean out the gas line to remove debris before making connections. Purge gas line to remove air before attempting to start unit. Purging air from gas lines should be performed as described in ANSI

Z223.1-latest edition “National Fuel Gas Code,” or in Canada as described in CAN/CGA-B149.

7. All field gas piping must be pressure/leak tested before unit operation. Use a non-corrosive bubble forming solution or equivalent for leak testing. The heater and its individual shut-off valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psi.

8. This unit requires the gas pressure to be within the unit’s minimum and maximum gas pressure ratings. If the pressure is greater than the maximum, the internal valve components will be damaged. If the pressure is below the minimum, the heater will not perform to specifications. Refer to

Table 5 on page 14 for gas pressure ratings.

Unit Size

Size 1

Size 2

Size 3

Size 4

Size 5

Table 4 - Gas Connection Sizes

Gas Pipe Size (NPT)

3/4”

1”

1”

1-1/4”

1-1/2”

13

1

Figure 10 - Gas Connection Diagram

1

2

3

4

A

5

1. Gas Supply Line Connection

2. Manual Gas Shut-off Valve

3. Ground Joint Union with Brass Seat

4. Plugged 1/8” NPT Test Gauge Connection

5. Sediment Trap

A. Minimum Depth = 3”

Table 5 - Gas Pressure

Gas Pressure Type

Size 1-3 Inlet

Size 4-5 Inlet

Maximum Manifold Pressure - Natural Gas

Maximum Manifold Pressure - Propane

Gas Pressure

7 -14 Inches WC

7 Inches WC - 5 psi

5 Inches WC Maximum

2.5 Inches WC Maximum

NOTICE

Refer to the heater’s rating plate for determining gas supply pressures and requirements.

14

ELECTRICAL

WARNING!

Disconnect power before installing or servicing unit. High voltage electrical input is needed for this equipment. A qualified electrician should perform this work.

Before connecting power to the heater, read and understand the entire section of this document. As-built wiring diagrams are furnished with each unit by the factory. The diagrams are attached to the control module’s door or provided with paperwork packet.

Electrical wiring ( Table 6 ) and connections must be made in accordance with local ordinances and the

National Electric Code, ANSI/NFPA 70. Verify the voltage and phase of the power supply, and the wire amperage capacity is in accordance with the unit nameplate. For additional safety information, refer to

AMCA publication 410-96, Recommended Safety Practices for Users and Installers of Industrial and

Commercial Fans.

1.

Always disconnect power before working on or near this equipment. Lock and tag the disconnect switch and/or breaker to prevent accidental power-up .

2. An electrical drop containing the line voltage power wiring is shipped with every unit. The electrical drop should be brought through one of the conduit openings located in the base of the unit (

Figure 3 on page 9 ), run through the curb, and connected to a junction box inside the building.

3. A dedicated branch circuit should supply the motor circuit with short circuit protection according to the

National Electric Code. This dedicated branch should run to the junction box.

4. Verify that the power source is compatible with the requirements of your equipment. The nameplate identifies the proper phase and voltage of the equipment.

5. Units shipped with a remote HMI will require a second drop through the base of the unit. It is important to route the motor wires in a separate conduit from the HMI wiring. Refer to

Figure 3 (Direct Fired)/

Figure 7 (Recirc) on page 11 .

6. Before connecting the unit to the building’s power source, verify that the power source wiring is deenergized. Refer to

“Fan to Building Wiring Connection” on page 16 .

7. Secure the power cable to prevent contact with sharp objects.

8. Do not kink power cable and never allow the cable to encounter oil, grease, hot surfaces, or chemicals.

9. Before powering up the unit, make sure that the fan rotates freely. Make sure that the interior of the unit is free of loose debris or shipping materials.

10. If any of the original wire supplied with the unit must be replaced, it must be replaced with type THHN wire or equivalent.

Table 6 - Copper Wire Ampacity

Wire Size AWG

3

2

6

4

1

14

12

10

8

Maximum Amps

65

85

100

115

130

15

20

30

50

15

Fan to Building Wiring Connection

Figure 11 - Wiring Connection Details

120V 1 PH.

1

Single Point Connection

208-240V 1 PH.

1

208-240/460/600V 3 PH.

1

2 2 2

3

4

BK WH GR

1. Disconnect Switch

2. Galflex Conduit (In Unit)

2

120V 1 PH.

1

3 3

4

BK

4

RD

WIRE COLOR

GR BK BK BK GR

BK - BLACK

RD - RED

WH - WHITE

GR - GREEN

3. Factory Wiring

4. Field Supplied Wiring - From building power or pre-wired control panel.

2

120V Optional

208-240V 1 PH.

1

208-240/460/600V 3 PH.

1

2

5

3

5

3

6

5

3

7

4 4

4

RD WH BK WH GR RD WH BK

1. Disconnect Switch

2. Galflex Conduit (In Unit)

3. Factory Wiring

4. Field Supplied Wiring - From building power or pre-wired control panel.

RD

WIRE COLOR

GR RD WH BK BK BK GR

BK - BLACK

RD - RED

WH - WHITE

GR - GREEN

5. 120V Single Phase Standing Power

6. 208-240 Single Phase

7. Three Phase

16

SL

SL

LLT

LLT

ICT

ICT

OCT

OCT

CDT

CDT

RT

OT

OT

DT

DT

ST

ST

IT

IT

RT

Make-up Air (MUA) Board Connectors

The Make-up Air (MUA) Board (

Figure 12

) is located in the main control cabinet.

Figure 12 - Make-up Air Board

J20 J21

Power Vent

Neutral

J19 J17

Power

Vent

Hot

Power

Vent

Hot

24V

DC

0-10

VIN

COM

COM

24V

DC

0-10

VIN

COM

COM

24V

AC

24V

AC

IN

COM

24V

AC

0-10

VIN

COM

COM

24V

AC

0-10

VIN

COM

COM

24V

AC

24V

AC

IN

COM

J39

PS1

1

CASLink BMS Slave

Pilot

Gas

Spark

Alarm

Blower

Burn

Hi

Temp

Aux

1 J11 8 1 J16 8 1 J25 3

R C DDC

C

HMI VFD Master

Y G BAS/STAT

17

Note: Some connections may not be used dependent on system configurations

RJ45 connectors.

Connector J1 and J2 are associated with BMS.

Connector J3 through J6 are interchangeable and may be used to connect to an HMI or VFD.

J1 - CASLink/Slave

J2 - CASLink/Slave

J3 - HMI/VFD/Master

J6

J4 - HMI/VFD/Master

J5 - HMI/VFD/Master

J6 - HMI/VFD/Master

J2

J5

J1

J4 J3

Connector J7 contains inputs and outputs for the

Flame Safety Controller (FSC)

9

18

Pin 1 - N/A

Pin 2 - 24VAC Pilot Valve

Pin 3 through Pin 8 - N/A

Pin 9 - 24VAC Common to Main/Pilot Gas Valve


1

10

Connector J8 contains inputs and outputs for the

Flame Safety Controller (FSC)

NOTE: Connector J8 only for Compact Models

9

18

Pin 1 - N/A

Pin 2 - 24VAC Pilot Valve


Pin 9 - 24VAC Common to Main/Pilot Gas Valve


1

10

Connector J9 contains 120V AC connections 1 8

Pin 1 - 120VAC Main Input

Pin 2 - 120VAC Input from Discharge Damper End

Switch

Pin 3 - 120VAC Input from Fire Micro-Switch

Pin 4 - 120VAC Output to Intake/Discharge Damper

Actuator

Pin 5 - 120VAC Input from Intake Damper End

Switch

Pin 6 - N/A

Pin 7 - 120VAC Output to Cabinet Heater

Pin 8 - 120VAC Neutral

18


Pin 1 - 120VAC Input from Evap Cooler Pressure

Switch

Pin 2 - 120VAC Input from Evap Cooler Float

Switch

Pin 3 - 120VAC Output to Evap Cooler Water

Solenoid

Pin 4 - 120VAC Output to Evap Cooler 3-way Drain

Valve

Pin 5 - 120VAC Input from Supply Overload

Pin 6 - 120VAC Output to Supply Starter Coil

Pin 7 - 120VAC Output to Exhaust Starter Coil

Pin 8 - 120VAC Input from Exhaust Overload

1 8

Connector J11 contains low voltage screw terminal connections

Pin 1

Pin 2

Pin 3

Pin 4

- 24VAC Auxiliary Input



- 24VAC Call for Heat Input

W Y G BAS/STAT

Pin 5 - 24VAC Call for Cooling Input

Pin 6 - 24VAC Call for Blower Input

Pin 7 - 24VAC Occupied Override Input

Pin 8 - 24VAC Isolated Common

1 8


Pin 1

Pin 2

Pin 3

Pin 4

- 24VAC Output to Smoke Detector

- 24VAC Output to Smoke Detector

- 24VAC Digital Input from Smoke Detector

- 24VAC Common to Smoke Detector

24V AC 24V AC

DI-1

24V AC

AI-1

Pin 5 - 24VAC Output to Air Quality Sensor

Pin 6 - 0-10V Analog Input from Air Quality Sensor

Pin 7 - 24VAC Common to Air Quality Sensor

Pin 8 - 24VAC Common to Air Quality Sensor

19

Connector J13 contains low voltage connections

7

14

1

10

Pin 1 - N/A

Pin 2 - PWM + Output for Supply ECM

Pin 3 - 24VAC Output for Low Gas Pressure Switch

Pin 4 - 24VAC Output for High Gas Pressure Switch

Pin 5 - 24VAC Output for Clogged Filter Switch

Pin 6 - 24VAC Output for Low Airflow

Pin 7 - 24VAC Input for Board Power

Pin 8 - N/A

Pin 9 - PWM Output for Supply ECM

Pin 10 - 24VAC Input from Low Gas Pressure

Switch

Pin 11 - 24VAC Input from High Gas Pressure

Switch

Pin 12 - 24VAC Input from Clogged Filter Switch

Pin 13 - 24VAC Input from Low Air Pressure Switch

Pin 14 - 24VAC for Board Power

1 8

Connector J14 contains screw terminal connections

24V DC

AI-2

24V DC

AI-3

Pin 1 - 24VAC Output to Humidity Sensor

Pin 2 - 0-10VDC Analog Input from Humidity Sensor

Pin 3 - 24VAC Common to Humidity Sensor


Pin 5 - 24VAC Output to Humidity Sensor

Pin 6 - 0-10VDC Analog Input VFD/Humidity Sensor

Pin 7 - 24VAC Common VFD/Humidity Sensor


1 10


Pin 1

Pin 2

Pin 3

Pin 4

Pin 5

- Intake Temperature Thermistor Input

- Intake Temperature Thermistor Input

- Return Temperature Thermistor Input

- Return Temperature Thermistor Input

- Outdoor Temperature Thermistor Input

THERMISTORS

Pin 6 - Outdoor Temperature Thermistor Input

Pin 7 - Discharge Temperature Thermistor Input

Pin 8 - Discharge Temperature Thermistor Input

Pin 9 - Space Temperature Thermistor Input

Pin 10 - Space Temperature Thermistor Input

20

1 8


BAS/STAT

Pin 1 - 0-10VDC Analog Input for Heat Modulation

Pin 2 - 4-20 mA Analog Input for Heat Modulation

Pin 3 - 24VAC Common


Pin 5

Pin 6

Pin 7

Pin 8

- 24VAC Unit Interlock Input

- 24VAC Output (Stat)

- 24VAC Output (R)

- 24VAC Common

NOTE: Connector J17 is grouped with connectors J-19 through J-21

R C


7

14

1

10

Pin 1 - 24VDC + Output

Pin 2 - 0-10VDC Analog Output for Mixing Box

Actuator

Pin 3 - 0-10VDC Analog Output for Bypass Damper

Pin 4 - 24VAC Output for DX Float Switch

Pin 5 - 24VAC Output for Door Interlock

Pin 6 - 24VAC Warm Liquid Bypass Output

Pin 7 - 24VAC for Damper Actuator

Pin 8 - 24VDC - Common

Pin 9 - Common for Mixing Box Actuator

Pin 10 - Common for Bypass Damper

Pin 11 - 24VAC Input from DX Float Switch

Pin 12 - 24VAC Input from Door Interlock

Pin 13 - 24VAC Warm Liquid Bypass Output

Common

Pin 14 - 24VAC for Damper Actuator

J20 J21

Connector J17 - N/A

Connector J19 - N/A

Connector J20 - N/A

Connector J21 - N/A

J19 J17

21

Connector J22 (Y1) Condenser 1



2 1

2 1

2 1

J22

J23

J24

J22 Pin 1 - 24VAC Output to Condenser 1

J22 Pin 2 - 24VAC Common to Condenser 1





1

Connector J25 contains low voltage screw terminal connections for DDC Communications Isolated

Pin 1 RS-485 +

Pin 2 RS-485 -

+ -

DDC

C

Pin 3 RS-485 Common

3

Connector J26 Programming Port

1

2

USB

Connector J27 USB Programming Port

1 8


Pin 1

Pin 2

Pin 3

Pin 4

- 24VAC Start Command for 3rd-Party VFD

- 24VAC Output

- 24VAC Trouble Input

- 24VAC Common for 3rd-Party VFD

24V AC 24V AC

DI-2

24V AC

AI-4

Pin 5 - 24VAC Constant Output

Pin 6 - 0-10VDC Analog Input VFD Speed

Reference



22

Connector J29 contains 120V AC connections

Pin 1 - 120VAC Blower Service Switch Input

Pin 2 - 120VAC Burner Service Switch Input

Pin 3 - 120VAC High Temp Limit Input

Pin 4 - 120VAC Output to FSC (6)

1

Pin 5 - 120VAC Output to FSC (7)

Pin 6 - N/A

Pin 7 - N/A

Pin 8 - 120VAC Neutral

8


Pin 1 - 120VAC Input from Pilot Gas FSC (3)

Pin 2 - 120VAC Pilot Gas Output - Connected to

J30-1

Pin 3 - 120VAC Input from Spark FSC (4)

Pin 4 - 120VAC Spark Output

Pin 5 - 120VAC Input from Main Gas FSC (5)

Pin 6 - 120VAC Main Gas Output - Connected to

J30-5

Pin 7 - 120VAC Alarm Input from FSC (A)

Pin 8 - 120VAC Alarm Output

Connector J31 - Contains inputs and outputs for components

9

18

1

10

Pin 1 - 24VDC + Output to Profile / Main Air Flow

Pressure Sensor

Pin 2 - 0-10VDC Analog Input from Profile / Main Air

Flow Pressure Sensor

Pin 3 - 24VDC/0-10VDC Common from Profile /

Main Air Flow Pressure Sensor

Pin 4 - N/A

Pin 5 - N/A

Pin 6 - N/A

Pin 7 - 24VDC + Output to Manifold Gas Pressure 1

Sensor

Pin 8 - 0-10VDC Analog Input from Manifold Gas

Pressure 1 Sensor

Pin 9 - 24VDC/0-10VDC Common from Manifold

Gas Pressure 1 Sensor

Pin 10 - 24VDC + output to Manifold Gas Pressure

2 Sensor

Pin 11 - 0-10VDC Analog Input from Manifold Gas

Pressure 2 Sensor

Pin 12 - 24VDC/0-10VDC Common from Manifold

Gas Pressure 2 Sensor

Pin 13 - 24VDC + output to Clogged Filter Pressure

Sensor

Pin 14 - 0-10VDC Analog Input from Clogged Filter

Pressure Sensor

Pin 15 - 24VDC/0-10VDC Common from Clogged

Filter Pressure Sensor

Pin 16 - 24VDC + Output for Analog or Static

Pressure Control for Blower/Damper

Pin 17 - 0-10VDC Analog Input for Analog or Static

Pressure Control for Blower/Damper

Pin 18 - 24VDC/0-10VDC Common for Analog or

Static Pressure Control for Blower/Damper

23

Connector J32 contains inputs and outputs for components

9

18

1

10

Pin 1 - N/A

Pin 2 - N/A

Pin 3 - 24VAC Output for Proof Of Closure

Pin 4 - N/A

Pin 5 - 24VAC Output To CO Alarm

Pin 6 - 0-24VDC + Analog Input from Flame Sensor

Pin 7 - 24VDC Powered PWM to Modulating Gas

Valve, Full Wave, 16 kHz

Pin 8 - 0-10VDC Out for VFD

Pin 9 - N/A

Pin 10 - N/A

Pin 11 - N/A

Pin 12 - 24VAC Input from Proof of Closure

Pin 13 - N/A

Pin 14 - 24VAC From CO Alarm

Pin 15 - 24VDC Common From Flame Sensor

Pin 16 - 24VDC Powered PWM to Modulating Gas

Valve, Full Wave, 16 kHz

Pin 17 - 0-10VDC Common for VFD

Pin 18 - N/A

Connector J33 contains inputs and outputs for components

Pin 1 through 8 - N/A

Pin 9 - 0-10VDC Analog Input for CFM

9

18

Pin 10 through 17 - N/A

Pin 18 - 0-10VDC Common for CFM

1

10

Connector J34 - N/A

2 1

4 3

1 10

Connector J35 N/A

THERMISTORS

24

Connector J36 N/A

9

18

Connector J37 N/A

2 1

4 3

MODBUS

C B A

Connector J38 Modbus

3

Pin 3 (C) Modbus Ground

1

Pin 1 (A) Modbus (-)

Pin 2 (B) Modbus (+)

ON

Dip Switch S1

1 2 3 4

Switch 1, 2, 3 always OFF. Switch 4 Always ON. If Switch 4 is OFF, BAS terminals disabled.

1

10

25

Dip Switch S2

Programming - Service Only

Dip Switch S3

End of line termination

Dip Switch S4

Programming - Service Only

ON

26

HMI and Remote Room Sensor Installation

Remote HMI faceplates (

Figure 13)

, remote room sensors (

Figure 14

), and smart controls may be ordered and shipped separately. These components measure temperature and assist in controlling the unit. These components should be installed in a safe location, free of influence from external heat sources.

Install sensors in areas indicative of the average room temperature, and away from heat-producing appliances. HMIs and remote room sensors can be installed directly to industry-standard junction boxes, either surface mounted or recessed mounted. HMIs have a built-in temperature/relative humidity (RH) sensor, which is typically used to help control the automatic function of the unit.

The HMI can also be configured to control the unit from a remote location manually. They can be configured not to use the internal temperature/relative humidity sensor. In this configuration, the sensor in the HMI is ignored in automatic operation. Multiple HMIs can be connected to one unit for temperature and

R/H averaging. All combination temperature/humidity HMIs will use a vented standoff. Mount the static pressure tube close to the HMI to obtain proper room conditions.

A max of 4 additional HMIs can be daisy-chained together. Place an End-of-Line (EOL) device in the last

HMI connected.

Figure 13 - HMI with Standoff

HMI Standoff

J-Box

Route static pressure tube close to the HMI in the space.

Static Pressure Tube

Connected to the High Pressure

Port on Pressure Sensor

5-1/2”

Cat 5 Connection

J1 on HMI-1 to J2 on HMI-2

HMI with Built-in

Temperature/Humidity

Sensor

5-1/2”

The room temperature sensor is a 10K ohm thermistor. The sensor provides constant room temperature to the controller.

It should be installed on a wall somewhere in the room, but not directly in the HVAC diffuser’s path or close to heatproducing appliances so that the reading is not affected by heat.

Room sensors are not required for proper control operation, but still can be configured as remote sensors or averaging sensors.

Do not install the room sensor on the ceiling .

Figure 14 - Remote Room Sensor

27

Temperature Control

Discharge Control : When used in discharge control, the MUA board receives a call to heat from the intake sensor. The MUA board will modulate the discharge temperature until the desired setpoint is reached. The user can choose whether discharge heating/cooling is activated based on intake temperature, space temperature, either, or both.

Space Control : When selected, an HMI with an internal temperature sensor or a temperature sensor wired to ST terminals on the MUA board can be used to sense space temperature. The user can choose whether the space heating/cooling is activated based on intake temperature, space temperature, either, or both.

Analog Control : If Analog Control is utilized, DIP switch #4 on the MUA board should be set On. Blower/

Heating/Cooling will be controlled by a 0-10V DC or 0-20mA signal based on input source.

Direct Digital Control (DDC) : A 0-10V DC or 0-20mA signal is sent to the MUA board from the building control system to regulate the blower/heating output of the unit.

In all cases, the MUA board controls the amount of gas to the burner based on the signal from the temperature control components.

The operation of the modulating gas valve with regard to voltage is as follows: from 0 volts to approximately 5 volts, the modulating gas valve should be on bypass flow with the heater operating on low or minimum fire. From approximately 5 volts to 15 volts DC, the valve should be performing its modulating function, and the heater should be firing at a modulated flow rate between low and high fire, depending upon the voltage. Above approximately 15 volts DC, the valve should be delivering full flow to the heater and the unit should be on high fire.

The temperature sensor ( Figure 15 ) is a 10K ohm thermistor. The sensor gives constant feedback to the

control board.

Figure 15 - Temperature Sensor

ECM (Electronically Commutated Motor) Speed Control

EC motors with control allow accurate adjustment of fan speed. The benefit of EC motors is exceptional efficiency, performance, and motor life.

External PWM Signal

The fan unit will be shipped with power wiring and communication wiring fed to an internal junction box.

The fan is shipped with Shielded Twisted Pair (STP) wire, which is used for wiring to a remote PWM signal.

Red wire is used to go to the positive PWM signal, and black wire is used to go to the negative PWM signal.

Reference schematics for all wiring connections. STP is connected to the communication wiring of the motor using wire nuts in the junction box. If a preset length of STP is provided, it will be connected to the junction box from the factory. Run the STP through any available knockout in the fan base.

28

OPERATION

Accessing Menu Configurations

General Overview

The HMI allows the user to change parameters and options. The user may use the HMI to view operating information regarding sensors, temperatures, pressures, and fault history on the HMI screen

(

Figure 16 ).

There are four buttons to navigate through the HMI screens.

NOTE: Buttons change functions during certain options and tests.

Verify the screen and buttons throughout the menu display.

Figure 16 - HMI Screen

OCCUPIED

SPACE

70°F

IDLE

The user can access the Top Menu HMI configurations by pressing the top two buttons simultaneously. To exit this screen, simply press the

‘BACK’ button. When setting certain options or functions, pressing the

‘BACK’ button multiple times will bring up the save screen (

Figure 17 ).

The user may select ‘YES’ to save the changes, select ‘NO’ to return to factory settings or select ‘CANCEL.’ When selecting ‘CANCEL,’ any changes made will not be saved, and the screen will return to the top menu.

The HMI menu system allows full access to every configurable parameter in the HMI. The parameters are factory configured to the specific application. Parameters may need to be modified to fine-tune automatic operation after the original setup.

Figure 17 - Save Screen

UP

SAVE CHANGES?

CONFIRM YES

BACK

DOWN ENTER

Remote (HMI) Control Panel

On units shipped with a space HMI, a Cat 5 cable will need to be run from J4, J5, or J6 (refer to schematics) on the main MUA Board to J2 on the HMI. If additional space HMIs have been added, they can be daisy-chained from the first HMI. In the event there is a slave MUA board, HMIs can also be powered from J1 or J2 of the slave board. An end of line resistor should be added to the last HMI in the chain.

HMI Notification Letters

The HMI will display notification letters (

Figure 18 ) when the unit is in a

specific status.

• B = Blower Start or Blower Stop Delay Active

• C = Condenser Min On or Min Off Timer Active. Displayed when any of the condensers are in a Min On/Off Time.

• D = Min or Max Discharge Temp Reached

• M = Max Temp Rise Reached

• R = OA Reset

• Δ = Dynamic SP Applied

Figure 18 - Notification Letters

B

OFF

01/01

FRI

B

OFF

HEAT

TEMP +

09:49

AM

SPACE

70°F

TEMP -

Notification

Letter Location

29

HMI Configuration Menu

To enter the configuration menu (

Figure 19

), press the bottom two buttons simultaneously on the HMI faceplate. In this menu screen, you may adjust Communication and Advanced Options, check Status, and

About information.

Figure 19 - Configuration Menu

UP MENU

Configuration

Communication

Advanced Options

Status

DOWN ENTER

Communication

Under the communication menu, the user may adjust the following settings:

• Modbus Address - Default is 55 for the first HMI. For every additional HMI, increase the address by one. For example, if a second HMI is used, the Modbus Address should be 56. For a third HMI, the

Modbus Address should be 57.

• Baud - The baud rate address is 115200.

• Parity - Do not adjust this setting. The default setting should always be set to ‘EVEN.’

Advanced Options

Under advanced options, the user may adjust the following settings:

• Contrast - The user may adjust the setting from 0 to 10. Setting the contrast to 0 is the lowest setting available, and 10 is the highest contrast setting available. The factory default contrast setting is 5.

• Audio Enable - User may set the audio to off.

• Dimming Enable - Default is set to Off. If set to On, the ‘HMI Dimming Timer’ option will be available.

• Set Time - The user may adjust dimming setting from 10-60 seconds. The default time is 30 seconds.

Status

User may monitor board temperature status, Uptime (how long the board has been active since last restart), HW RH (HMI hardware humidity sensor), HW Temp (HMI hardware temperature sensor).

About

User may view SCADA HMI Software Version, Modbus Address (assigned to HMI), Baud (115200).

30

Scheduling

To set a schedule on the HMI (

Figure 20 ), you must first enable scheduling:

Factory Settings >

Occupied Scheduling > On

Set your sensor temperature setpoints for occupied and unoccupied schedules: User Settings > Temp

Set Points > (Varies)

Once scheduling is enabled, and the temperature setpoints are configured, you may enter your scheduled days and times: User Settings > Scheduling

Schedule A Default

• Monday - Friday

8:00AM to 6:00PM

• Saturday and Sunday

Unocc

Schedule B Default

• Monday - Friday

Unocc


Unocc

Figure 20 - Scheduling Screen

Schedule C Default

• Monday - Friday

Unocc


Unocc

UP BACK

A

B

OCCUPIED SCHEDULING

MONDAY

8:00AM TO 6:00PM

6:00PM TO 6:00PM

DOWN ENTER

To adjust the settings, highlight the parameter and press ENTER .

• The first parameter to be highlighted will be the day. Press UP or DOWN to select the day an occupied time schedule is required.

• Press ENTER to continue to set a start time. Press UP or DOWN to set start time.

• Press ENTER to set an end time. Press UP or DOWN to set end time.

The system will run between these days, time, and desired temperature settings. When in the

UNOCCUPIED setting, the system will run at the unoccupied temperature setting.

Fan Speed and Damper Position Presets

Table 7

outlines the aux pins on Connector J11 for preset settings associated with fan speed and damper position found in Factory Settings > Unit Options .

Table 7 - Aux Presets

Presets

Normal Operation (Selected Blower Mode)

Fan Speed/Damper Position 1







Aux 1

X

X

X

X

Aux 2

X

X

X

X

Aux 3

X

X

X

X

31

Unit Options

Building Signal Damper Control

When this option is ordered, the outdoor air (supply) and return dampers will modulate based on a 0-10V

DC signal from the Building automation system. 0V = max outside air, 10V = max return air. Direct fired units cannot go below 20% outside air, maximum output voltage may differ.

Electric Cabinet Heater

Units can be shipped with an optional 120V electric cabinet heater powered from the MUA board. There is a temperature sensor built onto the MUA board that will regulate when the cabinet heater activates. To enable this option go to Factory Settings > Unit Options > Cabinet Heater > Enable . Temperature readings and adjustments can be made through the HMI. Go to User Settings > Temp Set Points >

Option Set Points > Cab Heat Set Points .

Motorized Intake Damper

On units shipped with the optional motorized intake damper, a power transformer is supplied with the unit if the main incoming voltage is greater than 120V. No external wiring to the damper motor is required.

Mixing Box Control Unit Options

Manual Control - The dampers can be controlled from the HMI in the unit or from a space HMI if one is provided to any position from 20% to 100% fresh air. This is a 0-10V setting, which is available under user settings, 100% Outdoor Air (0 volts), 80% Return Air (equivalent voltage). This will allow to manually set the dampers to match the building ventilation requirements. On a power failure, the return air damper will close by spring return.

Two Position Control - The dampers can be controlled by a two-position switch (a field-supplied switching device) to open the fresh air to 100%. The MUA board sends out a constant voltage. The field supplied switch will cut or allow the signal from the MUA board to the mixing box damper. On opening of the circuit, power failure, or if the unit is shut off, the return air damper will close by spring return. If the circuit is closed, the MUA board will allow the return air damper to open per the setpoint.

Outdoor Air % - The dampers can be controlled from the HMI in the unit or from a space HMI if one is provided to any position from 20% to 100% fresh air. There is an outdoor air percentage setting which is available under user settings. This will allow the user to manually set the dampers to match the building ventilation requirements.

• When preset OA is On, the unit will use preset values for mixing box OA% by directly associating

OA voltage to OA percentages. A calibration can be run from the service menu to store and use real-world results rather than provided defaults.

• When preset OA is Off, the MUA board utilizes an internal algorithm to alter its 0-10V output to the mixing box damper in order to maintain an exact outdoor air percentage. When this mixing box option is selected, a mixing box dead-band comes into play. This setting checks the delta T between outdoor and return air. If the difference between these two temperatures is less than or equal to the mixing box dead-band setting, the MUA board will not alter its output to the mixing box damper (default setting is 5 degrees). On a power failure, or if the unit is turned off, the return air damper will close by spring return.

Analog Control - When this is set to ON, a 0-10V input will drive the damper output to modulate linearly between the min and max OA voltage for both occupied and unoccupied modes.

Static Pressure Control - Damper position will modulate to maintain building pressure. Building pressure below the setpoint will increase the amount of outdoor air supplied to increase pressure. Building pressure above the setpoint will decrease the amount of outdoor air supplied to decrease pressure.

CO2 Control - When the unit senses the CO2 input to be above the threshold setting, the unit will decrease mixing box output until the CO2 falls below threshold setting.

32

Menu Descriptions

NOTE: Refer to “Menu Tree” on page 41 through page 48 for default/range settings.

User settings: Allows the user to change or set certain temperatures and configurations on the unit.

Factory settings: Requires a password (1111) to enter this menu. Factory settings are job-specific and configured from the plant. Any changes to the factory settings will require the user to save the updated changes.

Service: Requires a password (1234) to enter this menu. Allows a certified technician to monitor the unit and test components in the system.

User Settings

Temp Set Points - Some or all of these setpoints may not be available based on settings. If scheduling is enabled, there will be occupied and unoccupied values for each setpoint. The user will be allowed to check or adjust the setpoints/limits.

Dry Mode Config - The user will be allowed to view or adjust dry mode setpoints/limits when the option is enabled.

Scheduling - This menu will only show when the scheduling option is set to On.

• Scheduling Times - Each day contains the option for three occupied time periods. Time periods cannot overlap.

• Schedule Copy - This will allow the user to copy an existing schedule from one day of the week to individual days in the week, to Week Days, or All.

Fan Speed - Enabled when the supply fan is controlled by a VFD or ECM. The range of this menu is limited by the min and max setpoints under factory settings. When the fan is set to VFD, the settings will be displayed in Hertz. When the fan is set to ECM, the PWM percentage will be displayed. When occupied scheduling is set to On, occupied and unoccupied settings are available.

Mixing Box Setting - Mixing box will allow outdoor air in vs. return air. 0V out is equal to 100% OA and

0% RA.

Pressure Config - Adjustable pressure setpoints for static pressure control.

Active Faults Contains the current faults on the board.

Fault History Displays time-stamped history of the last 20 faults. The most recent fault will show first.

Reset Lockouts - Reset lockout faults.

Dynamic SP Diff - Temperature differential for dynamic setpoint change.

Dynamic SP Offset - Temperature amount that will change per differential.

Dynamic Heat OA - Outdoor air dynamic heat setpoint.

Dynamic Cool OA - Outdoor air dynamic cool setpoint.

CO2 Control Config - CO2 Parts Per Million (PPM) setpoints and sensor settings.

• PPM Low/High - CO2 Parts Per Million (PPM) threshold setpoints for the space.

• PPM Limit - CO2 Parts Per Million (PPM) threshold limit setpoints.

• Sensor Min/Max - Set minimum and maximum range setting for CO2 sensor.

33

Factory Settings Password to enter factory menu is 1111.

NOTE: Refer to “Menu Tree” on page

41 through page 48 for default/range settings.

Heating Type - Unit heating type is set from the factory.

Temperature Control - The MUA board monitors temperature control setpoints and components.

• Tempering Mode - The options for controlling the output of the tempering mode in heat/cool (if equipped). Available options are Intake/Discharge/Space/Analog Control/Direct Digital Control (DDC).

• Activate Based On - Select how the unit will activate based on temperature readings: Intake/Space/

Both/Either/Stat (field installed thermostat). These settings can be altered for occupied and unoccupied preferences.

• Activation Sensor - Allows selection of intake or outdoor sensor for unit to activate.

• Construction Mode - Configurable option for units used in construction settings.

Heating Config - Allows the user to set various heating configurations.

• # of Heat Stages - Default is set to 0 for units without gas heat. If the unit is equipped with gas heat, select 1.

• Gas Type - Select gas type, natural gas or propane, for the unit.

• Gas Valve Limits - This setting adjusts the unit’s gas valve range. You may adjust the Min or Max percentage range.

• Heat Hyst - Intake or Space tempering sensor must go this amount of degrees above the setpoint before heating turns off.

• Input Source - This lets the board know what signal (volts or milliamps) to expect from the analog control system. Only valid for analog tempering mode.

• 2nd Disch Sensor - On/Off selection. When an additional thermistor is added, the two thermistor readings will be averaged together. Default Off.

• Average High Temp - On/Off. When the “2nd Disch Sensor” is On, this menu will be available. When

“Average High Temp” is Off, if either discharge sensor goes above high temp limit the unit will go into high temp lockout. When “Average High Temp” is On, both thermistors readings will be used to determine high temp lockout. Default Off.

• Pre Purge Config - When enabled, this option will purge any gas that may not have combusted in the unit before the unit lighting off. You may set the amount of time the purge cycle will operate.

• Cabinet Hyst - The cabinet temp must reach this many degrees above the activation setpoint to turn off.

• Freezestat Timer - If the discharge temperature is below the freezestat setpoint for half the duration of the freezestat timer, the heat will shut off momentarily. If the freezestat trips for a second time, the heat will shut down immediately. Reset the lockout manually on the HMI.

• Construction Heater - When this option is set to On, settings will override any other airflow proving values and high-temperature setting.

• Max Temp Rise Limit - Compares max rise limit to calculated max temp rise. Software will always utilize the lower of the two values.

• Blwr Off Flame Fail - When enabled On, the blower will shut down if a flame lockout occurs. The blower may go back into operation after the fault is cleared.

34



Cooling Config - Allows the user to set various cooling configurations.

• Cooling Type - Selections are None, DX, Evap, Both. If “None” is selected, all cooling options under user settings are hidden.

• Min Cool OA Temp - When the space temperature is calling for cooling, and the outdoor air temperature is below the setpoint, the unit will shut the condensers off. The blower will start and use outdoor air to cool the space.

• Condenser Staging - Selections None, 1, 2, or 3 condensers. Within the 2 and 3 condenser selection, there is another sub-menu which allows for 2 or 3 stages. For 2 condenser units, 3 stages should only be selected when the condensers are of unequal tonnages.

• Cool Hyst - Intake or Space tempering sensor must fall this many degrees below the setpoint for cooling turns off.

• Condenser Min Times - Minimum time each condensing stage must remain on after becoming activated. This is to prevent stage cycling. A “C” will be present in the lower-left corner of the home screen when any of the condensers are in a MIN ON/OFF TIME.

• Evap Config

• Sprayer Times

• Time On - Time the evaporative cooler will spray in the cycle.

• Time Off - Time the evaporative cooler will be idle in the cycle.

• Evap Drain - Units that use evap drain should be set to On.

• Drain Hyst - Temperature differential setting before the drain shuts off.

• Evap Hyst - Temperature differential before the evap cooling shuts off.

Occupancy Config - Allows access to setting scheduling and/or override On or Off.

• Scheduling - This menu is where the scheduling can be turned On or Off. Default is Off.

• Override - This menu is where the occupancy override can be turned On or Off.

Unit Options - Allows user access to various options included with the unit.

• Board Config

• Unit Address - Modbus address of the MUA Board.

• Startup Timer - Time upon power-up where the board will sit idle.

• Temp Readings - Allows user to set temperature readings between Fahrenheit or Celsius.

Changing between the two will reset all setpoints.

• HMI Config - Allows access to adjust HMI settings and options.

• Number - Set the number of HMIs connected to the MUA board.

• Screensaver - Default is set to On. If set to Off, the home screen will not time out to the screensaver.

• Average HMI - If there are multiple space HMIs connected, this menu allows you to select which will be included in the space temperature and relative humidity averaging. If a thermistor or relative humidity sensor is connected into the ST screw terminals, it will automatically be averaged into any HMIs included. When in Space Tempering Mode, a minimum of one HMI must have Average HMI set to On, or a separate remote sensor must be used that is wired back to the MUA board.

• Lock Screen - If the option is set to On, a password (9999) will be required when; screensaver option is enabled or if any button functions are not pressed for 5 minutes.

• Scnsvr Disp - Displays date, time, and/or temperature when screensaver is active.

35


NOTE: Refer to “Menu Tree” on page 41 through page 48 for default/range settings. Refer to

Table 7 on page 31

for Aux pin settings .

• Blower Config

• Blower Control - Allows user to select between 120V Contactor, VFD Manual, VFD Preset, VFD

Jog, VFD 0-10V, ECM, ECM 0-10V, ECM Preset, ECM Pressure, ECP.

• 120V Contactor - 120V output on the MUA board to energize the coil of a contactor. This option should be selected when the MUA is used in conjunction with a DCV package.

• VFD Manual - HMI selectable VFD frequency.

• VFD Preset - HMI selectable fan preset speeds. Fan speed is determined by Aux pins.

• VFD Jog - For use with VFDs using photohelic control. Aux pins are used to control the VFD.

Powering aux 1 will speed the fan up, powering aux 2 will slow the fan down. When aux 1 or aux

2 are not powered, the VFD will hold current speed.

• VFD 0-10V - For use when an external 0-10V signal is being provided to control the speed of the

VFD. The VFD output from this input will be based on the VFD min and max freq set under protected params in factory settings. 0 Volts will equal VFD min, 10V will equal VFD max, and all voltages in between will be scaled linearly. This option will utilize 0-10V J14-(6) and 0-10V common J14-(7) screw terminals, and will require field wiring.

• VFD Pressure - For use with VFDs that use a pressure transducer (0-10V output).

• Electronically Commutated Motor (ECM) - HMI selectable PWM rate.

• ECM 0-10V - For use when an external 0-10V signal is being provided to modulate the ECM supply output between min and max speed.

• ECM Preset - HMI selectable PWM fan preset speeds. Fan speed is determined by Aux pins.

• ECM Pressure - For use with ECMs that use a pressure transducer (0-10V output).

• Blower Mode :

- If “Occ” is set to On, the menu screen for the blower mode will allow you to choose ON/AUTO

OFF for Occupied or Unoccupied.

- If “Occ” is set to Off, the menu screen for the blower mode will allow you to choose MANUAL/

AUTO/INTERLOCK. In blower auto mode, the blower will only run when it gets a call for heating/ cooling.

- In blower manual/on mode, the blower will run as long as the fan button is enabled regardless of whether the unit is heating/cooling. In blower off mode, closing contacts J16-5 (unit intlk) and

J16-6 (24V AC) will cause the blower to run.

• Blower Presets - User may set blower preset option On/Off.

• Post Purge Config - When enabled, this option will run the blower for the set time after heating has shutdown.

• Door Interlock - When enabled, if the door is open, the supply fan will shut down immediately.

• Fan Proving Config - To set fan proving, the Exhaust Contactor must be set to Before Airflow or

After Airflow. When enabled, the user may set the number of contactors used. Contactor 1 = Aux 2.

Contactor 2 = Aux 3.

• VFD Direction - Sends a command to the VFD to run in forward or reverse.

• VFD Freq Limits - Min to Max range settings for fan speed.

• VFD Volt Limits - Min to Max range settings for third party VFDs.

• PWM Rate Limits - Range Min to Max settings for fan speed.

• Occ Fan Presets - After the blower has started, the blower setting will use the aux pins to drive the preset occupied value.

• Unocc Fan Presets - After the blower has started, the blower setting will use the aux pins to drive the preset unoccupied value.

36





• Occ PWM Presets - After the blower has started, the blower setting will use the aux pins to drive the preset unoccupied value.

• Unocc PWM Presets - Allows user to set unoccupied preset blower speed value.

• VFD By Others - This option will be used when a factory provided Modbus control VFD is not utilized. A start command, as well as a 0-10 V output will be provided to the VFD.

• Pressure Config

• Sensor Range - Menu is available when any blower pressure or mixing box pressure option is selected.

• Static PS KP - Proportionally constant value for static pressure measured in V/sec.

• Cycle Time - Cycle time is the time between two consecutive readings.

• PS Hysteresis - Percentage band between high and low static setpoints. This will reduce cycling of blower or damper. Increase this value if the blower speed or damper does not settle into a setpoint.

• Airflow Proving - User can set unit to prove with airflow sensor located on the board.

• Purge Config

• Purge Button - When the purge button is pressed, the damper will open to max outdoor air and turn on the exhaust contactor, if enabled. Purge Button must be enabled for Dry Mode use.

• Purge Time - This is the amount of time that the unit will run the purge process if the user does not stop the purge manually.

• Purge Speed - Adjustable between VFD or ECM. Min and Max frequency the fan will run during the purge cycle.

• Dry Mode Config - When this option is set to On, there are three separate ways to initiate dry mode. Through the HMI home screen, through a hardwired input, or automatic activation. When dry mode is activated:

- The unit will go to Dry Mode Discharge when there is a call for heat.

- Space dewpoint is the average of the Space RH input with any additional HMI inputs.

- If OA dewpoint < Space dewpoint, the mixbox should go to mix box outdoor air. This should override any other mixbox functionality. The exhaust contactor should turn on.

- If OA dewpoint > Space dewpoint, the mixbox should go to min OA%. The exhaust contactor should not turn on.

- Purge should run until the purge timer expires or the user cancels the purge.

• Space DP SP - Dewpoint threshold for automatic dry mode activation.

• Monitoring Sensors - Smoke Detector, Filter Monitor, Intake Firestat, Discharge Firestat, Freezestat,

Low Gas Switch, High Gas Switch, CO Shutdown.

• Mixing Box Config

• Mixing Box - Off, Manual, 2 Position, Outdoor Air %, Analog Control, Pressure, CO2.

• Mixing Box Deadband - If the temperature difference between the outdoor and return sensor is less than or equal to this setpoint, the MUA board will not attempt to adjust the output voltage until it matches the outdoor air percentage setpoint. This setting only takes effect when either outdoor air

% or schedule is selected.

• Return As Space - Setting this to On will not require a space sensor or HMI. This setting will use the return air thermistor (RT) in place of the space sensor.

• Off Position - Allows user to select how the dampers will be positioned when the supply fan is off.

Standard (default), Max Outdoor Air %, or Min Outdoor Air %.

• Mixing Box Limits - Minimum and maximum settings for mixing box. Percentage or voltage based on mixing box selection.

• Preset OA Values - On/Off option. If set to On, the voltage values equivalent to air percentage.

• Edit OA% Table - User may edit voltages for the equivalent to outdoor air percent table.

37





• Damper Presets - This allows the user to set damper preset option On or Off.

• Preset Volts - Uses aux pins to control damper actuator.

• Occ/Unocc Preset Volts - When scheduling is On, Occ Preset Volts and Unocc Preset Volts with be available.

• Intake Damper - User can adjust intake damper to be On or Off.

• Discharge Damper - User can adjust discharge damper to be On or Off.

• Room Override - Uses room override SP rather than Discharge SP. This setting will only have an effect when the heat tempering mode setting is discharge and activate based on is not set to intake.

• Exhaust Contactor - This allows the user to assign a contactor for an interlocked exhaust fan. There are occupied and unoccupied settings.

• None

• Before airflow - Exhaust fan will start before the airflow proving switch has been activated.

• After airflow - Exhaust fan will start after the airflow proving switch has proved there is airflow.

• Exhaust On Smoke - Input that when enabled, if it receives a 24VAC signal from a fire system, this will shut down the supply fan and enable the exhaust contactor. The 24VAC signal must originate from the MUA Board.

• Cabinet Heater - This allows the user to enable the cabinet heater, if applicable. If enabled, the temperature sensor on MUA board controls the cabinet heater. When this option is enabled, to adjust setpoints, go to User Settings > Temp Set Points > Option Set Points > Cab Heat Set Points .

• Blower Throttle - The throttle function is to maintain profile pressure across the burner.

• Throttle Volt Step - Increases/decreases fan speed when a third party VFD is used.

• Proof of Closure - For gas valves that contain a proof of closure switch, the user may set this option

On. Before heating occurs, a 24V AC input must be present at connector J32 pin 12.

• No FSC Reset - When this option is set to On, the flame safety control will not reset on a failure to prove flame. If the flame fails, a manual reset is required immediately via the push button or HMI.

• Warm Liquid Bypass - Prevents freezing of condensing coil in low ambient temperatures.

• Trouble Input - While connector J28 pin 3 receives 24 volts, the unit will act based on one of the following settings:

• Unit Off - Shuts down blower (heating/cooling will also shutdown). Timers will be bypassed.

• Both Off - Turn off/lockout heating and cooling. Bypass min on/off timers.

• Heat Off - Turns off/lockout heating.

• Cool Off - Turns off/lockout cooling. Bypass min on/off timers.

• Set Back - Forces unit to unoccupied state.

• DD Wheel Size - Direct drive wheel size selection. The wheel size selection will be utilized for CFM monitoring. Models available are 11,13, 15, 18, 20, 24, 30, 36, 16Z, 18Z, 20Z, 22Z, 25Z, 28Z.

• CO2 Control Config - Mixing box settings for CO2 control.

• Override - If CO2 exceeds override setting, the blower will speed up incrementally from PPM low

(speed when override started or damper position when override started) to PPM high (max speed or max outside air). Accepts 0-10V DC input to determine CO2 level.

• Threshold - If CO2 exceeds CO2 threshold, the blower will speed up, or the damper will open

(depending on selection). Accepts 0-10V DC input to determine CO2 level.

38



• Outdoor Reset - Allows access to setting option On/Off. Below are scenarios for Outdoor Reset functionality.

- Discharge Heat Tempering: If outside air is below OA Reset Low setpoint, heat will discharge to

Reset Heat Discharge setting.

- Space Heat Tempering: If outside air is below OA Reset Low setpoint, space setpoint will adjust to

Reset Heat Space setting.

- Intake Cool Tempering: If outside air is above OA Reset High setpoint, cooling will go to max staging. If both evap and dx are present, unit will run all.

- Intake Space Cool Tempering: If outside air is below OA Reset Low setpoint, space setpoint will adjust to Reset Cool Space setting.

• Dynamic Set Point - below are scenarios for dynamic functionality. For heating, every multiple of the Dynamic Set Point Differential would multiply the effect of the Dynamic Offset setting.

- When heating: If the measured outside air temperature is below the Dynamic Heat OA setpoint minus the differential setpoint, the space or discharge setpoint will increase/decrease by the offset setting.

- When cooling: If the measured outside air temperature is above the Dynamic Cool OA setpoint minus the differential setpoint, the space or discharge setpoint will increase/decrease by the offset setting.

Occ Ovrd Duration - Length of override timer. If override is active, it can be manually stopped by pressing the end override button on the HMI.

Limit SP Adjust - This allows the user to change the current temperature setpoint through the home screen. The range adjustment is 0-100 degrees. Default is 5°F. When the setpoint is set to 0°F, the adjustment buttons (+/-) will not be visible.

Temp Ovrd Duration - Length of temperature override timer.

PID Parameters - (DO NOT CHANGE THESE PARAMETERS)

Sensor Offsets - Offset adjustment for Discharge, Space, and Intake sensor parameter settings.

39

Service Settings Password to enter service menu is 1234.


Temperatures - User can monitor various temperature values.

Relative Humidity - Displays current humidity readings per HMI.

Open/Closed Status - Menu to view the open/closed status of all inputs.

Variable Values - Allows the user to monitor all of the variable input and output values.

VFD Status - Allows the user to monitor VFD parameters.

High Temp Limit - Displays the high temp limit.

Airflow Limits - Displays the high/low airflow limits.

Mixing Box Values - Allows the user to monitor mixing box values.

Test Menu - When in a testing state, to cancel the test you must set the ‘State’ back to OFF.

• Test Fans - All, Supply, Exhaust.

• Test Heating - Contains high and low fire tests for stages. If “Heating Config” is set to 0, then “No Heat

Stage Set” will display.

- In test mode, the high limit setting will be based on intake temp + max temp rise + 10 degrees or the unit’s high limit setting (170°F), whichever is higher.

- If mixing box is On, set to 0V or 100% OA.

- Exiting test mode should reset the PID.

• Test Cooling - Test cooling or heat pump system. Also, monitors cooling system specifications.

• Test High Temp Limit - Test menu allows user to set limit to simulate a high temp fault.

• Test Options

• Test Cabinet Heater - Beginning this test will activate the cabinet heater on.

• Test Drain Heater - Beginning this test will activate the drain heater on.

• Test Mixing Box - Beginning this test will create an output to the outdoor air control. The test will begin at 0 volts. The up and down buttons allow for modulation of the output.

• Test Freezestat - Test menu will allow user access to adjust setpoints to verify freezestat operation in various types of ambient conditions.

Clear Fault History - This will clear the entire fault history. If there is an active fault when cleared, that fault will show up until it is fixed.

Set Clock - Set day and time. This allows the user to set their time zone.

Factory Reset - Confirming will reset to the last time the unit was commissioned or an update factory defaults was performed.

Update Factory Defaults (DFLTS) - This allows the original factory default settings to be overridden.

When confirming the updated settings, these settings will now be used when “Factory Reset” is used.

Calibrate Mixing Box Calibration process to update factory default values to building site conditions.

Reset MB To Defaults - Resets mixing box back to default values.

Calibrate Static PS - User may calibrate static pressure sensor. Must disconnect all pressure tubes prior to calibration.

Calibrate CFM - Calibrates pressure differential in the venturi to calculate approximate fan CFM. Must disconnect all pressure tubes prior to calibration.

CFM - Displays measured CFM readings. This readout is only valid for units with direct-drive wheels.

About - Displays unit type and software revision.

40

Menu Tree

User Settings

NOTE: If scheduling is On, occupied and unoccupied settings will be available for some parameters.

USER SETTINGS

TEMP SET POINTS INTAKE SET POINTS

DISCHARGE SET POINTS

SPACE SET POINTS

DISCHARGE LIMITS

DIFFERENTIALS

OPTION SET POINTS

HEAT (OCC/UNOCC)

COOL (OCC/UNOCC)

EVAP (OCC/UNOCC)

HEAT

HEAT (OCC/UNOCC)

COOL (OCC/UNOCC)

MIN (OCC/UNOCC)

MAX (OCC/UNOCC)

INTAKE (OCC/UNOCC)

SPACE (OCC/UNOCC)

ROOM OVERRIDE

FIRESTAT SET POINTS

FREEZESTAT SET POINTS

CAB HEAT SET POINT

EVAP DRAIN SET POINT

WARM LIQ SET POINTS

RANGE: 35-110°F/2-43°C

DEFAULT: 45°F/7°C

RANGE: 55-120°F/13-50°C

DEFAULT: 85°F/29°C

RANGE: 55-100°F/13-38 °C


RANGE: 40-150°F/4-66°C


RANGE: 35-110°F/2-43°C


RANGE: 55-120°F/10-32°C


RANGE: 40-160°F/4-71°C

DEFAULT: 50°F/4°C

RANGE: 40-160°F/4-66°C


RANGE: 0-20°F/0-13°C

DEFAULT: 10°F/6°C

RANGE: 0-20°F/0-13°C

DEFAULT: 2°F/2°C

RANGE: 40-150°F/4-66°C


INTAKE

DISCHARGE

FREEZESTAT

CAB HEAT

EVAP DRAIN

STAGE 1

STAGE 2

RANGE: 100-300°F/38-149°C


RANGE: 100-300°F/38-149°C


RANGE: (-40)-75°F/(-40)-24°C

DEFAULT: 35°F/2°C

RANGE: 0-40°F/(-18)-4°C

DEFAULT: 0°F/-18°C

RANGE: 35-50°F/2-10°C

DEFAULT: 40°F/4°C

RANGE: 0-50°F/(-18)-10°C

DEFAULT: 35°F/2°C

RANGE: 0-50°F/(-18)-10°C

DEFAULT: 35°F/2°C

OA RESET LOW

OA RESET HIGH

RESET HEAT DISCHARGE

RANGE: 35-110°F/7-43°C

DEFAULT: 45°F/7°C

RANGE: 35-110°F/7-43°C


RANGE: 40-150°F/4-65°C


RESET HEAT SPACE

RESET COOL SPACE

RANGE: (-10)-10°F/(-6)-6°C

DEFAULT: 2°F/1°C

RANGE: (-10)-10°F/(-6)-6°C

DEFAULT: 2°F/1°C

41

User Settings


USER SETTINGS

DRY MODE CONFIG

SCHEDULING

FAN SPEED (VFD)

FAN SPEED (ECM)

MIXING BOX SETTING

PRESSURE CONFIG

ACTIVE FAULTS

FAULT HISTORY

RESET LOCKOUTS

DYNAMIC SP DIFF

DYNAMIC SP OFFSET

DYNAMIC HEAT OA

DYNAMIC COOL OA

CO2 CONTROL CONFIG

DISCHARGE TEMP

OUTDOOR AIR %

RANGE: 40-150°F/4-66°C


RANGE: MIN OA - MAX OA

DEFAULT: 100%

SCHEDULING TIMES

COPY SCHEDULE

FREQ (OCC/UNOCC)

RATE (OCC/UNOCC)

OA (OCC/UNOCC)

LOW (OCC/UNOCC)

HIGH (OCC/UNOCC)

MONDAY-SUNDAY

COPY FROM “DAY”

COPY TO “DAY”/WEEKDAYS/ALL

RANGE: MIN-MAX FREQ

DEFAULT: 60 HZ

RANGE: 0-100%

DEFAULT: 100%

START A/B/C - UNOCC/TIME

END A/B/C - UNOCC/TIME

RANGE: 0-100% or 0-10V

DEFAULT: 0% or 0V

RANGE: - 5.0 - HIGH

DEFAULT: 0.00 "WC

RANGE: LOW - 5.0

DEFAULT: 0.10 "WC

DISPLAYS ACTIVE FAULTS

DISPLAYS UP TO

20 FAULTS

RESETS ACTIVE

LOCKOUTS

RANGE: 0-50°F/0-25°C

DEFAULT: 10°F/5°C

RANGE: (-20)-20°F/(-11)-11°C

DEFAULT: 1°F/1°C

RANGE: 0-110°F/(-18)-43°C

DEFAULT: 30°F/-1°C

RANGE: 35-110°F/2-43°C


PPM LOW (OCC/UNOCC)

PPM HIGH (OCC/UNOCC)

PPM LIMIT

SENSOR MIN

SENSOR MAX

RANGE: 0 PPM-PPM HIGH

DEFAULT: 500 PPM

RANGE: PPM LOW-2,000 PPM

DEFAULT: 1,000

RANGE: 1-2,499 PPM

DEFAULT: 1,000

SET RANGE TO CO2

SENSOR MIN SETTING

SET RANGE TO CO2

SENSOR MAX SETTING

42

Factory Settings - Password 1111


FACTORY SETTINGS

HEATING TYPE MOD DF/D76/IND DF

TEMPERATURE CONTROL

HEATING CONFIG

TEMPERING MODE

ACTIVATE BASED ON

(OCC/UNOCC)

ACTIVATION SENSOR

CONSTRUCTION MODE

# OF HEAT STAGES

GAS TYPE

GAS VALVE LIMITS

HEAT HYST

INPUT SOURCE

2ND DISCH SENSOR

AVERAGE HIGH TEMP

PRE PURGE CONFIG

CABINET HYST

FREEZESTAT TIMER

CONSTRUCTION HEATER

MAX TEMP RISE LIMIT

BLWR OFF FLAME FAIL

HEAT (OCC/UNOCC)

DISCHARGE, SPACE,

ANALOG, DDC

COOL (OCC/UNOCC)

ACT (OCC/UNOCC)

SENSOR

ENABLE

INTAKE, SPACE,

ANALOG, DDC

INTAKE/SPACE/

BOTH/EITHER/STAT

INTAKE/OUTDOOR

DEFAULT: INTAKE

ON/OFF

DEFAULT: OFF

RANGE: 0-1

DEFAULT: WITH HEAT OPTION IS 1

DEFAULT: WITHOUT HEAT OPTION IS 0

NAT GAS/PROPANE

MIN

MAX

SPACE

INTAKE

0-10VDC, 2-10VDC,

0-20mA, 4-20mA

ENABLE

ENABLE

ENABLE

SECONDS

HYST

MINUTES

ENABLE

DELTA

ENABLE

RANGE: 0-100%

DEFAULT: 0%

RANGE: MIN- 100%

DEFAULT: 100%

RANGE: 0-2°F/0-1°C

DEFAULT: 1°F/1°C

RANGE: 0-10°F/0-6°C

DEFAULT: 3°F/2°C

JOB SPECIFIC

ON/OFF

DEFAULT: OFF

ON/OFF

DEFAULT: OFF

ON/OFF

DEFAULT: OFF

RANGE: 0-120 S

DEFAULT: 30 S

RANGE: 1-10°F/0-6°C

DEFAULT: 1°F/1°C

RANGE: 1-10 M

DEFAULT: 10 M

ON/OFF

DEFAULT: OFF

RANGE: 40°F/22°C to MAX VALUE SETTING

DEFAULT: VARIES BY UNIT

ON/OFF

DEFAULT: OFF

43



FACTORY SETTINGS

COOLING CONFIG

OCCUPANCY CONFIG

UNIT OPTIONS

COOLING TYPE

MIN COOL OA TEMP

CONDENSER STAGING

COOL HYST

CONDENSER MIN TIMES

EVAP CONFIG

SCHEDULING

OVERRIDE

BOARD CONFIG

NONE/DX/EVAP/BOTH

RANGE: 40-90°F/4-32°C


NONE (DEFAULT), 1 COND 1 STAGES, 2 COND 2 STAGES,

2 COND 3 STAGES, 3 COND 2 STAGES, 3 COND 3 STAGES

SPACE

INTAKE

MIN ON

MIN OFF

RANGE: 0-2°F/0-1°C

DEFAULT: 1°F/1°C

RANGE: 0-10°F/0-6°C

DEFAULT: 3°F/2°C

RANGE: 1-15 M

DEFAULT: 2 M

RANGE: 1-15 M

DEFAULT: 1 M

SPRAYER TIMES TIME ON

EVAP DRAIN

TIME OFF

ENABLE

DRAIN HYST

HYST EVAP HYST

ON/OFF

DEFAULT: OFF

ON/OFF

DEFAULT: ON

UNIT ADDRESS

STARTUP TIMER

TEMP READINGS

HMI CONFIG

RANGE: 75-89

DEFAULT: 85

TIME

MODE

NUMBER

SCREENSAVER

AVERAGE HMI

LOCK SCREEN

SCNSVR DISP MODE

RANGE: 0-60 S

DEFAULT: 15 S

RANGE: 0-500 S

DEFAULT: 60 S

ON/OFF

DEFAULT: OFF

RANGE: 1-5°F/1-3°C

DEFAULT: 2°F/1°C

RANGE: 0-10°F/0-6°C

DEFAULT: 1°F/1°C

RANGE: 5-240 S

DEFAULT: 5 S

FAHRENHEIT/CELSIUS

DEFAULT: FAHRENHEIT

RANGE: 1-5

DEFAULT: 1

ON/OFF

DEFAULT: ON

ON/OFF

DEFAULT: OFF

ON/OFF

DEFAULT: OFF

DATE/TIME

TEMP/DATE/TIME

TEMP

NOTE: When Average HMI is set to more than 1, each HMI will have an averaging On/Off setting.

44



FACTORY SETTINGS

UNIT OPTIONS BLOWER CONFIG

PRESSURE CONFIG

BLOWER CONTROL

BLOWER MODE

BLOWER PRESETS

POST PURGE CONFIG

DOOR INTERLOCK

FAN PROVING CONFIG

VFD DIRECTION

VFD FREQ LIMITS

VFD VOLT LIMITS

PWM RATE LIMITS

OCC FAN PRESETS

UNOCC FAN PRESETS

OCC PWM PRESETS

UNOCC PWM PRESETS

VFD BY OTHERS

SENSOR RANGE

STATIC PS KP

CYCLE TIME

PS HYSTERESIS

FAN PRESETS DEFAULT

PRESET 0 = 0 Hz

PRESET 1 = 40 Hz

PRESET 2 = 50 Hz

PRESET 3 = 60 Hz

PRESET 4 = 0 Hz

PRESET 5 = 0 Hz

PRESET 6 = 0 Hz

PRESET 7 = 0 Hz

120V CONTACTOR (DEFAULT), VFD MANUAL,

VFD PRESET, VFD JOG, VFD 0-10V, VFD PRESSURE,

ECM, ECM 0-10V, ECM PRESET, ECM PRESSURE, ECP

OCC/UNOCC

AUTO, OFF, ON

DEFAULT: AUTO

ENABLE

ON/OFF

DEFAULT: OFF

ENABLE

PURGE TIME

ENABLE

ENABLE

# OF CONTACTORS

DIRECTION

OCC/UNOCC MIN

OCC/UNOCC MAX

OCC/UNOCC MIN

OCC/UNOCC MAX

OCC/UNOCC MIN

OCC/UNOCC MAX

PRESET (0-7)

ON/OFF

DEFAULT: ON

RANGE: 0-600 S

DEFAULT: 30 S

ON/OFF

DEFAULT: OFF

OFF/PROVING

DEFAULT: OFF

1/2

DEFAULT: 1

FORWARD/REVERSE

DEFAULT: FORWARD

RANGE: 0-MAX FREQ

DEFAULT: 0.0 HZ

RANGE: MIN FREQ- 80

DEFAULT: 80 HZ

RANGE: 0-10 V

DEFAULT: 0 V

RANGE: 0-10 V

DEFAULT: 10 V

RANGE: 0-100%

DEFAULT: 0%

RANGE: 0-100%

DEFAULT: 100%

RANGE: 0-80 HZ

DEFAULT: VARIES

PRESET (0-7)

PRESET (0-7)

PRESET (0-7)

ENABLE

RANGE: +/- .25" W.C. or +/- 5" WC

DEFAULT: +/- .25" W.C.

RANGE: 0.10 V/S - 0.50 V/S

DEFAULT: 0.15 V/S

RANGE: 5-60 S

DEFAULT: 5 S

RANGE: (-5.00)-5.00”

DEFAULT: 0.25”

PWM PRESETS DEFAULT

PRESET 0 = 0%

PRESET 1 = 80%

PRESET 2 = 90%

PRESET 3 = 100%

PRESET 4 = 0%

PRESET 5 = 0%

PRESET 6 = 0%

PRESET 7 = 0%

RANGE: 0-80 HZ

DEFAULT: VARIES

RANGE: 0-100%

DEFAULT: VARIES

RANGE: 0-100%

DEFAULT: VARIES

ON/OFF

DEFAULT: OFF

45



FACTORY SETTINGS

UNIT OPTIONS AIRFLOW PROVING

PURGE CONFIG

MONITORING SENSORS

MIXING BOX CONFIG

CONTROL

PURGE BUTTON

PURGE TIME

PURGE SPEED

DRY MODE CONFIG

SMOKE DETECTOR

FILTER MONITOR

INTAKE FIRESTAT

DSCHRG FIRESTAT

FREEZESTAT

LOW GAS SWITCH

HIGH GAS SWITCH

CO SHUTDOWN

MIXING BOX

MIXING BOX DEADBAND

RETURN AS SPACE

OFF POSITION

MIXING BOX LIMITS

PRESET OA VALUES

EDIT OA% TABLE

DAMPER PRESETS

PRESET VOLTS

OCC PRESET VOLTS

UNOCC PRESET VOLTS

ONBOARD/REMOTE

DEFAULT: ONBOARD

ENABLE

DURATION

VFD

ECM

ENABLE

SPACE DP SP

ON/OFF

DEFAULT: OFF

RANGE: 1-120 M

DEFAULT: 60 M

RANGE: 0-80 HZ

DEFAULT: 60.0 HZ

RANGE: 0-100%

DEFAULT: 100%

ON/OFF

DEFAULT: OFF

RANGE: 40-80°F/4-27°C)


ON/OFF

DEFAULT: OFF

ON/OFF

DEFAULT: OFF

ON/OFF

DEFAULT: OFF

ON/OFF

DEFAULT: OFF

ON/OFF

DEFAULT: OFF

ON/OFF

DEFAULT: OFF

ON/OFF

DEFAULT: OFF

HEAT/UNIT

DEFAULT: UNIT

MODE

DEADBAND

ENABLE

OFF

MIN OA OCC/UNOCC

MAX OA OCC/UNOCC

ENABLE

OFF, MANUAL, 2 POSITION, OUTDOOR AIR %,

ANALOG CTRL, PRESSURE, CO2

RANGE: 0-10°F/0-6°C

DEFAULT: 5°F/3°C

ON/OFF

DEFAULT: OFF

MAX OUTDOOR AIR%, MIN OUTDOOR AIR%, STANDARD

DEFAULT: MAX OUTDOOR AIR%

RANGE: MIN-MAX %

DEFAULT: 20%

RANGE: MIN-MAX %

DEFAULT: 100%

ON/OFF

DEFAULT: OFF

Adjustable percent values from 0-10V. Based on % is movement of mixing box damper. No value may be the same.

ENABLE

ON/OFF

DEFAULT: OFF

ENABLE

PRESET 1-7

ON/OFF

DEFAULT: OFF

RANGE: 0.0-7.45 V

DEFAULT: 0.0 V

PRESET 1-7

RANGE: 0.0-7.45 V

DEFAULT: 0.0 V

46



FACTORY SETTINGS

UNIT OPTIONS

OCC OVRD DURATION

LIMIT SP ADJUST

TEMP OVRD DURATION

PID PARAMETERS

SENSOR OFFSETS

INTAKE DAMPER

DISCHARGE DAMPER

ROOM OVERRIDE

EXHAUST CONTACTOR

EXHAUST ON SMOKE

CABINET HEATER

BLOWER THROTTLE

THROTTLE VOLT STEP

PROOF OF CLOSURE

NO FSC RESET

WARM LIQUID BYPASS

TROUBLE INPUT

DD WHEEL SIZE

CO2 CONTROL CONFIG

OUTDOOR RESET

DYNAMIC SET POINT

DURATION

LIMIT

ENABLE

ENABLE

ENABLE

MODE

ENABLE

ENABLE

ENABLE

STEP

ENABLE

ENABLE

ENABLE

UNIT OFF, BOTH OFF, COOL OFF,

HEAT OFF, SET BACK

MODELS: 11,13, 15, 18, 20, 24, 30,

36, 16Z,18Z, 20Z, 22Z, 25Z, 28Z.

ON/OFF

DEFAULT: OFF

ON/OFF

DEFAULT: OFF

ON/OFF

DEFAULT: OFF

NONE, BEFORE AIRFLOW, AFTER AIRFLOW

DEFAULT: BEFORE AIRFLOW

ON/OFF

DEFAULT: OFF

ON/OFF

DEFAULT: OFF

ON/OFF

DEFAULT: OFF

RANGE: 0.10-2.0 V

DEFAULT: 0.5V

ON/OFF

DEFAULT: OFF

ON/OFF

DEFAULT: OFF

ON/OFF

DEFAULT: OFF

OVERRIDE

THRESHOLD

OFF/BLOWER/DAMPER

DEFAULT: OFF

OFF/BLOWER/DAMPER

DEFAULT: OFF

ON/OFF

DEFAULT: OFF

ON/OFF

DEFAULT: OFF

RANGE: 1-16 H

DEFAULT: 1 H

RANGE: 0-100°F/0-55°C

DEFAULT: 5°F/3°C

RANGE: 1-16 H

DEFAULT: 1 H

DURATION

DO NOT ADJUST THESE

SETTINGS

DSCHRG DISP

SPACE DISP

INTAKE RH

SPACE RH

RANGE: (-20)-20°F/(-10)-10°C

DEFAULT: 0°F/0°C

RANGE: (-20)-20°F/(-10)-10°C

DEFAULT: 0°F/0°C

RANGE: (-30)-30%

DEFAULT: 0%

RANGE: (-30)-30%

DEFAULT: 0%

47

Service Settings - Password 1234

SERVICE SETTINGS

TEMPERATURES

MONITOR TEMPERATURE

SENSOR READINGS

RELATIVE HUMIDITY HMI (1-5)

OPEN/CLOSED STATUS

VARIABLE VALUES

INPUTS

OUTPUTS

INPUTS

CURRENT HMI HUMIDITY

READINGS

COMPONENTS INPUT

READINGS

COMPONENTS OUTPUT

READINGS

COMPONENTS INPUT

VARIABLE READINGS

COMPONENTS OUTPUT

VARIABLE READINGS

VFD STATUS

HIGH TEMP LIMIT

AIRFLOW LIMITS

MIXING BOX VALUES

TEST MENU

OUTPUTS

VFD PARAMETER

READINGS

DISPLAYS HIGH TEMP

LIMIT READINGS

HIGH/LOW AIRFLOW

READINGS

DISPLAYS MIXING BOX

VALUES

TEST FANS STATE

TEST HEATING STATE

CLEAR FAULT HISTORY

TEST COOLING

TEST HIGH TEMP LIMIT

TEST OPTIONS

CONFIRM

STATE

STATE

TEST CABINET HEATER

TEST DRAIN HEATER

TEST MIXING BOX

TEST FREEZESTAT

SET CLOCK CURRENT DATE AND TIME

FACTORY RESET

UPDATE FACTORY DFLTS

CALIBRATE MIXING BOX

RESET MB TO DEFAULTS

CALIBRATE STATIC PS

CALIBRATE CFM

CFM

ABOUT

CONFIRM

CONFIRM

START

RESET

ENTER

ENTER

CFM READINGS

INLET PS READINGS

TYPE

SW REV

OFF, ALL, SUPPLY,

EXHAUST

OFF, LOW FIRE,

HIGH FIRE, ANALOG

OFF, ALL, STAGE 1,

STAGE 2, EVAP

OFF, HTL

Note: Heating parameters are displayed below State selection

Note: Cooling parameters are displayed below State selection

Note: Temp parameters are displayed below State selection

STATE OFF, CAB HEAT

STATE OFF, DRAIN HEAT

STATE

STATE

OFF, MIX BOX

OFF, FREEZESTAT

48

Variable Frequency Drive (VFD)

WARNING!!

- Before installing the VFD drive, ensure the input power supply to the drive is OFF.

- The power supply and motor wiring of the VFD must be completed by a qualified electrician.

- The VFD is factory programmed, only change if replaced or ordered separately.

Consult the VFD manual and all documentation shipped with the unit for proper installation and wiring of

the VFD. The VFD has been programmed by the factory with ordered specific parameters. Use Table 8 as

a guide during installation.

Table 8 - VFD Installation Check List

Check

Off

Description

The installation environment conforms to the VFD manual.

The drive is mounted securely.

Space around the drive meets the drive’s specification for cooling.

The motor and driven equipment are ready to start.

The drive is properly grounded.

The input power voltage matches the drive’s nominal input voltage.

The input power connections at L1, L2, and L3 are connected and tight. Verify correct size crimp fitting is used.

The input power protection is installed.

The motor power connection at U, V, and W are connected and tight. Verify correct size crimp fitting is used.

The input, motor, and control wiring are run in separate conduit runs.

The control wiring is connected and tight.

NO tools or foreign objects (such as drill shavings) are in the drive.

NO alternative power source for the motor (such as a bypass connection) is connected - NO voltage is applied to the output of the drive.

49

VFD Installation

Input AC Power

• Circuit breakers feeding the VFDs are recommended to be thermal-magnetic and fast-acting. They

should be sized based on the VFD amperage. Refer to Table 9 on page 52 . See installation schematic

for exact breaker sizing.

• Every VFD should receive power from its own breaker. If multiple VFDs are to be combined on the same breaker, each drive should have its own protection measure (fuses or miniature circuit breaker) downstream from the breaker.

• Input AC line wires should be routed in conduit from the breaker panel to the drives. AC input power to multiple VFDs can be run in a single conduit if needed. Do not combine input and output power cables in the same conduit.

• The VFD should be grounded on the terminal marked PE. A separate insulated ground wire must be provided to each VFD from the electrical panel. This will reduce the noise being radiated in other equipment.

ATTENTION: Do not connect incoming AC power to output terminals U, V, W. Severe damage to the drive will result. Input power must always be wired to the input L terminal connections (L1, L2, L3).

VFD Output Power

• Motor wires from each VFD to its respective motor MUST be routed in a separate steel conduit away from control wiring and incoming AC power wiring. This is to avoid noise and crosstalk between drives.

An insulated ground must be run from each VFD to its respective motor. Do not run different fan output power cables in the same conduit.

• VFD mounted in ECP: A load reactor should be used and sized accordingly when the distance between the VFD and motor is greater than specified below. The load reactor should be installed within

10 feet of the VFD output:

575/600V - Load reactor should be used when distance exceeds 25 feet.

• VFD mounted in fan: The load reactor should be sized accordingly when the VFD is mounted in the fan.



208/230V - Load reactor is optional but recommended for 15 HP and above motors.

460/480V - Load reactor is optional but recommended for 7.5 HP and above motors.

575/600V - Load reactors are required for all HP motors.

• If the distance between the VFD and the motor is extremely long, up to 1000 FT, a dV/dT filter should be used, and the VFD should be increased by 1 HP or to the next size VFD. The dV/dT filter should be sized accordingly and installed within 10 feet of the output of the VFD.

208/230V – dV/dT filter should be used when distance exceeds 400 feet.



• Do not install a contactor between the drive and the motor. Operating such a device while the drive is running can potentially cause damage to the power components of the drive.

• When a disconnect switch is installed between the drive and motor, the disconnect should only be operated when the drive is in a STOP state.

50

VFD Programming

Programming

1. The Drive should be programmed for the proper motor voltage. P107 is set to 0 (Low) if motor voltage is 120V AC, 208V AC or 400V AC. P107 is set to 1 (High) if the motor voltage is 230V AC, 480V AC, or

575V AC.

2. The Drive should be programmed for the proper motor overload value. P108 is calculated as Motor

FLA x 100 / Drive Output Rating (refer to


).

To enter the PROGRAM mode to access the parameters:

1. Use the buttons on the VFD screen ( Figure 21 ) to adjust VFD settings. Press the Mode (M) button.

This will activate the password prompt (PASS).

2. Use the Up and Down buttons to scroll to the password value (the factory default password is “0225”) and press the Mode (M) button. Once the correct password is entered, the display will read “P100”, which indicates that the PROGRAM mode has been accessed at the beginning of the parameter menu.

3. Use the Up and Down buttons to scroll to the desired parameter number.

4. Once the desired parameter is found, press the Mode (M) button to display the present parameter setting. The parameter value will begin blinking, indicating that the present parameter setting is being displayed. The value of the parameter can be changed by using the Up and Down buttons.

5. Pressing the Mode (M) button will store the new setting and exit the PROGRAM mode. To change another parameter, press the Mode (M) button again to re-enter the PROGRAM mode. If the Mode button is pressed within 1 minute of exiting the PROGRAM mode, the password is not required to access the parameters. After one minute, the password must be re-entered to access the parameters again.

P500 parameter provides a history of the last 8 faults on the drive. It can be accessed without entering

PROGRAM mode.

Figure 21 - VFD Screen

AUTO FWD

RUN

REV

M

R F

STOP

NOTE: When a parameter is changed in the drive, the drive should be de-energized. Wait for the display to go completely dark. Once the display is completely dark, the drive can be re-energized.

51

ACTECH SMV VFD

Table 9 - Cross-Reference

HP

0.5

1

1.5

2

3

5

Part Number

ESV371N02YXB571

ESV751N02YXB571

ESV112N02YXB571

ESV152N02YXB571

ESV222N02YXB571

ESV402N02TXB571

7.5

ESV552N02TXB571

10 ESV752N02TXB571

15 ESV113N02TXB571

20

3

5

1

2

HP Part Number Volts

0.5

ESV371N01SXB571 120/240V

1 ESV751N01SXB571 120/240V

1.5

ESV112N01SXB571 120/240V

1Ø

Input

X

X

X

3Ø

Input

-

-

-

1 ESV751N04TXB571

1.5

ESV112N04TXB571

2

3

ESV152N04TXB571

ESV222N04TXB571

5 ESV402N04TXB571

7.5

ESV552N04TXB571

10 ESV752N04TXB571

15 ESV113N04TXB571

20 ESV153N04TXB571

25 ESV183N04TXB571

30 ESV223N04TXB571

40 ESV303N04TXB571

50 ESV373N04TXB571

60 ESV453N04TXB571

40

50

60

ESV153N02TXB571

ESV751N06TXB571

ESV152N06TXB571

ESV222N06TXB571

ESV402N06TXB571

7.5

ESV552N06TXB571

10 ESV752N06TXB571

15 ESV113N06TXB571

20 ESV153N06TXB571

25 ESV183N06TXB571

30 ESV223N06TXB571

ESV303N06TXB571

ESV373N06TXB571

ESV453N06TXB571

Volts

240V

240V

240V

240V

240V

240V

240V

240V

240V

240V

480V

480V

480V

480V

480V

480V

480V

480V

480V

480V

480V

480V

480V

480V

600V

600V

600V

600V

600V

600V

600V

600V

600V

600V

600V

600V

600V

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

Input Amps 1Ø

120V AC

9.2

16.6

20

Input Amps 1Ø

240V AC

4.6

8.3

10

-

-

-

-

-

X

X

1Ø

Input

X

X

X

X

X

X

X

X

X

X

3Ø

Input Input Amps 1Ø Input Amps 3Ø

X 5.1

2.9

X

X

8.8

12

5

6.9

13.3

17.1

-

-

-

-

-

8.1

10.8

18.6

26

33

48

59

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

10.2

12.4

19.7

25

31

36

47

2

3.2

4.4

6.8

59

71

2.5

3.6

4.1

5.4

9.3

12.4

15.8

24

31

38

45

59

74

87

27

32

41

9

11

17

22

1.7

2.7

3.9

6.1

52

62

2.1

3

14

21

27

3.5

4.8

8.2

11

34

40

52

65

77

Output

Amps

2.4

4.2

6

Breaker 1Ø

120V AC

15

25

30

Breaker 1Ø

240V AC

15

15

20

Output

Amps Breaker 1Ø Breaker 3Ø

2.4

15 15

4.2

6

15

20

15

15

7

9.6

16.5

23

29

42

54

25

30

-

-

-

-

-

50

80

90

15

20

30

40

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

50

60

70

20

20

30

40

15

15

15

15

90

110

15

15

25

40

50

15

15

15

20

70

80

100

125

150

52

START-UP OPERATION

Before starting up or operating the unit, verify all fasteners are secure and tight. Check the set screw in the wheel hub, bearings, and the fan sheaves (pulleys). With power and gas OFF to the unit or before connecting the unit to power, turn the fan wheel by hand. Verify it is not striking the inlet or any obstructions. If necessary, re-center.

Special Tools Required: Standard Hand Tools, AC Voltage Meter, Tachometer, Amperage Meter,

Manometer, Differential Pressure Gauge

Start-up Procedure

1. Check all electrical connections are secure and tight.

2. Check pulley alignment and belt tension. Refer to

“Pulley Alignment/Proper Belt Tension” on page 55 .

3. Inspect the condition of the intake damper and damper linkage, if applicable.

4. Remove intake filters if not already installed, inspect the air stream for obstructions. Install intake filters.

5. Compare the supplied motor voltage with the fan’s nameplate voltage. If this does not match, correct the problem.

6. Place the external disconnect to the ON position to start the unit. Immediately place the disconnect switch off. Check the rotation of the fan with the directional arrow on the blower scroll. Reversed rotation will result in poor air performance, motor overloading and possible burnout. For units equipped with a single-phase motor, check the motor wiring diagram to change rotation. For 3-phase motors, any two power leads can be interchanged to reverse motor direction.

7. When the fan is started, observe the operation and check for any unusual noises.

8. Place the external disconnect switch back to the ON position. The system should be in full operation with all ducts attached. Measure the system airflow. The motor sheave (pulley) is variable pitch and allows for an increase or decrease of the fan RPM. If an adjustment is needed, refer to

“Pulley

Adjustment” on page 54

. Refer to “Pulley Combination Chart” on page 56 for adjustment

specifications.

9. Once the proper airflow is achieved, measure and record the fan speed with a reliable tachometer.

Caution - Excessive speed will result in motor overloading or bearing failure.

Do not set fan

RPMs higher than specified in the maximum RPM chart .

Refer to “Troubleshooting” on page 73

for more information.

10. Measure and record the voltage and amperage to the motor. Compare with the motor’s nameplate to determine if the motor is operating under safe load conditions. Once the RPM of the ventilator has

been properly set, disconnect power. Re-check belt tension and pulley alignment, refer to “Pulley

Alignment/Proper Belt Tension” on page 55 .

53

Pulley Adjustment

The adjustable motor pulley is factory set for the RPM specified ( Table 10

). Speed can be increased by closing or decreased by opening the adjustable motor sheave. Two groove variable pitch pulleys must be adjusted to an equal number of turns open or closed. Any increase in speed represents a substantial increase in horsepower required by the unit. Motor amperage should always be checked to avoid serious damage to the motor when the speed is varied. Always torque set screws according to the torque

specifications shown in Figure 22

.

Figure 22 - Adjustable Pulley

Decrease Amperage and

Blower RPM Setscrew Thread Size Torque (in-lbs)

No. 10 (bushing)

1/4” (bushing)

5/16”

32

72

130

Blower Size

10”

12”

15”

18”

20”

25”

Belt Drive

Max. RPM

1800

1500

1400

1200

1000

900

Table 10 - Maximum RPM and HP Chart

Max. HP

5

5

2

3

10

20

Blower Size

15D

20D

24D

30D

36D

16Z

18Z

20Z

22Z

25Z

28Z

Direct Drive

Max. RPM

1800

1500

1400

1200

1000

2400

3200

2300

1900

1800

1400

Max. HP

5

5

10

4

5

5

2

3

5

8

7

54

Pulley Alignment/Proper Belt Tension

1. Belts tend to stretch and settle into pulleys after an initial start-up sequence. Do not tension belts by changing the setting of the motor pulley , this will change the fan speed and may damage the motor.

• To re-tension belts, turn OFF power to the fan motor.

• Loosen all fasteners that hold the blower motor plate to the blower housing.

• Rotate the motor to the left or right to adjust the belt tension. Belt tension should be adjusted to allow 1/64” of deflection per inch of belt span. Use extreme care when adjusting V-belts as not to misalign pulleys. Any misalignment will cause a sharp reduction in belt life and produce squeaky noises. Over-tightening will cause excessive belt and bearing wear as well as noise. Too little tension will cause slippage at start-up and uneven wear.

• Whenever belts are removed or installed, never force belts over pulleys without loosening motor first to relieve belt tension. When replacing belts, use the same type as supplied by the manufacturer. On units shipped with double groove pulleys, matched belts should always be used.

2. All fasteners should be checked for tightness each time maintenance checks are performed before restarting unit.

Belt tension examples:

• Belt span 12” = 3/16” deflection

• Belt span 32” = 1/2” deflection

Figure 23 - Pulley Alignment/Belt Tension

A. Belt Span Length

B. Deflection

C. Center Distance

A

B

Correct Incorrect

C

Incorrect Incorrect

55

Pulley Combination Chart

Motor RPM

1/3 to 1-1/2 HP

AX BELTS

1725

MOTOR PULLEY

1VL34

BLOWER PULLEY

AK114

DATUM DIAMETER

11

PITCH DIAMETER

11.2

Dd1

1.9

Open

5

308

1/3 to 2 HP

AX BELTS

BLOWER PULLEY

AK114

AK94

AK79

AK66

AK54

AK46

AK39

AK32

DATUM DIAMETER

11

9

7.5

6.2

5

4.2

3.5

3

MOTOR PULLEY

1VL40

PITCH DIAMETER

11.2

9.2

7.7

6.4

5.2

4.4

3.7

3.2

Dd1

2.4

Open

5

400

488

582

701

863

1019

1212

1402

3 to 5 HP

BX BELTS

BLOWER PULLEY

2BK160H

2BK140H

2BK120H

2BK110H

2BK100H

2BK90H

2BK80H

2BK70H

2BK60H

2BK55H

2BK50H

7-1/2 to 10 HP

BX BELTS

BLOWER PULLEY

2BK160H

2BK140H

2BK120H

2BK110H

2BK100H

2BK90H

2BK80H

3 to 5 HP

BX BELTS

BLOWER PULLEY

2B5V278

2B5V250

2B5V234

2B5V200

2B5V184

2B5V160

2B5V154

2B5V136

2B5V124

2B5V110

DATUM DIAMETER

15.4

13.4

11.4

10.4

9.4

8.4

7.4

6.4

5.4

4.9

4.4

DATUM DIAMETER

15.4

13.4

11.4

10.4

9.4

8.4

7.4

MOTOR PULLEY

2VP42

PITCH DIAMETER

15.7

13.7

11.7

10.7

9.7

8.7

7.7

6.7

5.7

5.2

4.7

Dd1

2.9

Open

6

330

378

442

484

534

595

672

772

908

995

1101

MOTOR PULLEY

2VP60

PITCH DIAMETER

15.7

13.7

11.7

10.7

9.7

8.7

7.7

Dd1

4.3

Open

6

516

592

693

758

836

932

1053

DATUM DIAMETER

27.8

25

23.4

20

18.4

16

15.4

12.6

12.4

11

MOTOR PULLEY

2VP42

PITCH DIAMETER

28.1

25.3

23.7

20.3

18.7

16.3

15.7

12.9

12.7

11.3

Dd1

2.9

Open

6

184

205

218

255

277

317

330

401

407

458

7-1/2 to 10 HP

BX BELTS

BLOWER PULLEY

2B5V278

2B5V250

2B5V234

2B5V200

2B5V184

2B5V160

2B5V154

2B5V136

2B5V124

2B5V110

DATUM DIAMETER

27.8

25

23.4

20

18.4

16

15.4

12.6

12.4

11

MOTOR PULLEY

2VP60

PITCH DIAMETER

28.1

25.3

23.7

20.3

18.7

16.3

15.7

12.9

12.7

11.3

Dd1

4.3

Open

6

289

320

342

399

434

497

516

628

638

717

15 to 20 HP

BX BELTS

MOTOR PULLEY

2VP75

BLOWER PULLEY

2B5V278

2B5V250

2B5V234

2B5V200

2B5V184

2B5V160

2B5V154

DATUM DIAMETER

27.8

25

23.4

20

18.4

16

15.4

PITCH DIAMETER

28.1

25.3

23.7

20.3

18.7

16.3

15.7

2B5V136 12.6

12.9

** 2HP Motors on 20 IN Blowers use 2VP42 Pulleys

Dd1

5.8

Open

6

381

423

451

527

572

656

681

829

Pd2

4

4 1/2

200

222

237

276

300

344

357

435

441

496

Pd2

5.9

4 1/2

307

341

364

425

461

529

549

669

679

763

Pd2

7.4

4 1/2

399

443

473

552

600

688

714

869

Pd2

5.9

4 1/2

549

630

737

806

889

991

1120

Pd2

4

4 1/2

357

409

479

524

578

644

728

837

984

1078

1193

Pd2

3

3 1/2

354

Pd2

3.6

3 1/2

447

544

650

782

962

1137

1352

1563

TURNS ON MOTOR PULLEY

3

370


3

462

2 1/2

477

2

493

563

672

809

995

1176

1399

1617

581

694

836

1028

1215

1445

1671

600

717

863

1062

1255

1492

1725

1 1/2

508

619

739

889

1095

1294

1539

1779

4

366

420

491

537

593

661

747

858

1009

1106

1223

4

560

642

752

822

907

1011

1143

4

205

227

243

283

307

353

366

446

453

509

4

313

348

371

433

470

540

560

682

693

779

4

405

450

480

561

609

698

725

883

2 1/2

385


3 1/2

375

430

504

551

608

677

765

880

1034

1133

1254

3

385

441

516

564

622

694

784

901

1059

1161

1285

2 1/2

394

451

528

578

637

710

803

923

1084

1189

1315


3 1/2 3 2 1/2

571

655

767

838

925

1031

1165

582

667

781

854

943

1051

1187

593

680

796

871

960

1071

1210


3 1/2 3 2 1/2

210

233

249

290

315

362

375

457

464

522

3 1/2

319

355

378

442

480

550

571

695

706

794

2

400

215

239

255

297

323

370

385

468

475

534

3

325

361

386

450

489

561

582

709

720

809

1 1/2

416

220

244

261

304

331

379

394

479

487

547


2 1/2

331

368

393

459

498

571

593

722

733

824


3 1/2

411

457

488

569

618

709

736

896

3

417

464

495

578

627

720

747

909

2 1/2

424

470

502

586

636

730

758

923

Pd1

3

5

194

216

230

269

292

335

348

423

430

483

Pd1

4.7

519

538

655

666

748

5

301

334

357

416

452

Pd1

6.2

5

393

436

466

544

590

677

703

856

Pd1

4.7

5

538

617

722

790

871

972

1098

Pd1

3

5

348

399

467

511

563

628

709

815

958

1050

1162

Pd1

2

4

339

Pd1

2.6

4

431

525

627

755

929

1098

1305

1509

Dd2

3.9

5 1/2

189

210

224

262

284

326

339

412

419

471

Dd2

5.5

508

527

642

652

733

5 1/2

295

327

349

408

443

Dd2

7

5 1/2

387

430

459

535

581

667

692

842

Dd2

5.5

5 1/2

527

604

708

774

854

952

1075

Dd2

3.9

5 1/2

339

388

455

497

548

611

691

794

933

1023

1132

Dd2

2.9

4 1/2

323

Dd2

3.4

4 1/2

416

506

605

728

896

1059

1259

1455

1

431

1/2

447

Closed

0

462

1

524

638

762

916

1128

1333

1585

1833

1/2

539

656

784

943

1161

1372

1632

1887

Closed

0

554

675

806

970

1194

1411

1678

1941

2

403

462

541

591

652

727

821

944

1110

1216

1346

2

604

693

811

887

978

1091

1232

2

225

250

267

312

338

388

403

490

498

560

2

338

375

400

467

507

582

604

735

747

840

2

430

477

509

595

646

741

769

936

1 1/2

412

472

553

605

667

744

840

965

1135

1244

1376

1 1/2

615

705

826

903

996

1110

1255

1 1/2

230

256

273

319

346

397

412

501

509

572

1 1/2

344

382

408

476

517

593

615

749

761

855

1 1/2

436

484

517

603

655

751

780

949

1

421

483

565

618

682

760

859

987

1160

1272

1407

1/2

430

493

577

631

697

777

877

1008

1185

1299

1438

Closed

0

439

504

590

645

711

793

896

1030

1211

1327

1468

1

626

718

840

919

1014

1130

1277

1

442

491

524

612

664

762

791

963

603

626

762

774

870

1

350

389

415

484

526

1

235

261

279

326

354

406

421

513

521

585

1/2

637

730

855

935

1031

1150

1299

1/2

240

267

285

333

361

414

430

524

532

598

1/2

356

395

422

493

535

614

637

776

788

885

1/2

448

498

531

620

673

773

802

976

Closed

0

648

743

870

951

1049

1170

1322

Closed

0

454

505

539

629

683

783

813

990

Closed

0

362

402

429

501

544

624

648

789

801

901

Closed

0

246

273

291

340

369

423

439

535

543

611

56

Air Flow Sensor

The MUA board contains an on-board pressure sensor

(

Figure 24 ) for airflow monitoring. There are both high and

low airflow tubing connections connected to a sensor, measuring the pressure drop across the burner. This is to verify that there is proper airflow (0.15 to 0.80 inch wc) across the burner and proper combustion at all times.

There are two airflow tubes in the heater, located near the burner and profile plate assembly (profile plates surround the burner and control air into the burner section).

In the case of clogged filters, blocked intake, excessive duct static pressure, or a broken belt, the correct burner differential pressure may not be achieved, not allowing the low airflow sensor to close. The airflow sensor protects against profile plate failures that cause excessive airflow through the burner. In the event that the pressure drop across the burner is not in the range of the airflow sensor, gas flow to the burner is stopped by the Flame Safety

Control. NOTE: With the blower running, verify the airflow pressure reading is a positive value.

Reverse the airflow tubes if the reading is negative.

Figure 24 - Board Airflow Sensor

AIRFLOW

AIRFLOW

H1

PS1

L2

AIRFLOW

AIRFLOW

To view burner profile pressure on the HMI, go to Service > Variable Values > Inputs > Onbd Prof PS .

Figure 25

illustrates the approximate CFM going through the unit vs. the differential pressure measured by the airflow switch. Simply measure the differential profile pressure drop at the airflow tubes in the unit and match that value up to the unit curve. This will show the CFMs traveling through the burner and will indicate proper airflow or airflow problems (too much or not enough).

Figure 25 - CFM Chart

Size 1-3 Heater CFM vs. Burner Profile Pressure

10000

9000

8000

7000

6000

5000

4000

3000

2000

1000

0

0.15

0.2

0.25

Size 1

Size 2

Size 3

0.3

0.35

0.4

0.45

0.5

Burner Differential Profile Pressure (in. w.c.)

0.55

0.6

0.65

25000

23000

21000

19000

17000

15000

13000

11000

9000

7000

5000

3000

0.15

0.2

Size 4-5 Heater CFM vs. Burner Profile Pressure

Size 4

Size 5

0.25

0.3

0.35

0.4

0.45

0.5

Burner Differential Profile Pressure (in. w.c.)

0.55

0.6

0.65

57

Modulating Gas System

The Modulating Gas System is directly controlled from the MUA Board at connector J32 pin 7(+) and 16(-).

A modulating 0-24V DC signal is utilized to modulate the gas valve signal. The signal is a 16 kHz full-wave rectified signal.

The Modulating Gas System consists of an Intake Temp Sensor, a Discharge Temp Sensor, a Space

Temp Sensor (only on space temperature control options), and modulating gas valve(s). The intake air sensor, the space sensor, or a combination of the two can be used to give a call for heat signal to the MUA board.

The MUA board uses a PID loop and checks the difference between the temperature sensor readings in order to modulate the heat appropriately.

• For kitchen MUA heating applications, intake air setpoint should be set at 45°F, whereas the discharge setpoint should be set at 55°F. The defaults may be adjusted per field conditions.

• For all other applications, the setpoint should be set appropriately based on end-user preferences and on-site conditions.

High Temperature Limit

One of the backup safety devices is the high-temperature limit lockout. This temperature sensor measures the temperature inside the unit, downstream of the burner. If the factory-set temperature of 170°F is exceeded, it will signal the FSC to turn off the burner. This requires a manual reset of the high-temperature limit. Refer to

“Resetting Unit” on page 78 .

Pilot Adjustment

1. Restart the fan and check the gas supply pressure at the inlet gas gauge upstream of all electronic valves. The inlet pressure should be 7 - 14 inches wc (7 inches wc - 5 psi on Size 4-5 heaters) . If the inlet pressure is too high, install an additional pressure regulator external to the unit.

2. Open the field-installed manual gas shut-off valve.

3. Close the ball valve located inside the cabinet.

Figure 26 - Pilot Assembly

Pilot Tube

Connection

Spark Connection

Flame Rod

Connection

4. Call for heat using the HMI Service > Test Menu > Test

Heating > High Fire.

If the pilot does not light, purge the pilot line. If air purging is required, disconnect the pilot line at the outlet of the pilot valve.

5. Check the pilot flame voltage on the HMI. The voltage reading should be 12V-15V DC .

The Flame LED on the

Flame Safety Controller should be illuminated too. A weak pilot flame can be caused by low gas pressure or a dirty pilot orifice.

Flame Rod

Clearance = 2.96”

6. To adjust the pilot flame, remove the cap from the pilot adjustment screw on the combination gas valve, refer to

Figure 27

. Increase the pilot gas flow by turning the screw counter-clockwise. Decrease the pilot gas flow by turning the screw clockwise. The flame signal voltage should read 12V-15V DC on the HMI under Service > Test Menu > Test Heating .

7. Once the pilot has been established, open the main manual gas shut-off valve downstream of the electronic valves. Check to make sure that the main gas valve opens and gas flows to the burner.

58

Main Burner Adjustment

1. Once the pilot has been properly established, the manifold gas pressure or temperature rise should be adjusted to nameplate or design specifications. The gas pressure regulator is adjusted at the factory for average gas conditions. It is important that the gas supplied to the burner is in accordance with the

input rating on the rating plate. Refer to See “Gas Pressure” on page 14.

• For size 1-3 heaters, the gas pressure regulator is integral to the combination gas valve.

• For size 4-5 heaters, the gas pressure regulator is located on the modulating valve.

2. Use the service test menu to lock the unit in high fire: Service > Test Menu > Test Heating > State >

High Fire . Press Enter.

3. The manifold pressure should be checked at the pressure gauge downstream of the modulating valve.

Figure 28 on page 60 indicates the proper manifold pressure for the desired amount of BTUs per foot

of burner. For natural gas systems, the high fire manifold pressure should not exceed 5 inches wc .

For propane gas, the high fire manifold pressure should not exceed 2.5 inches wc .

Another method of checking high fire is to measure the temperature rise of the unit. The temperature rise should be set to design specifications and typically is minimum 70°F.

4. Every unit has a specific design manifold gas pressure based on CFM and temperature rise. Refer to the unit’s nameplate for the design manifold gas pressure.

5. For size 1-3, remove the cap from the combination gas valve for regulator adjustment. For size 4/5, remove the cap from the modulating valve (location #1 Figure 27 on page 60 ).

6. Use the regulator pressure adjusting screw to adjust the high fire manifold pressure to design temperature rise ( 5 inches wc maximum for natural gas and 2.5 inches wc maximum for propane gas). High fire should be set to generate the design temperature rise. If the high fire screw is at the end of its adjustment and more pressure is needed, then adjust the main building gas pressure regulator spring (located external to the unit) to achieve the proper manifold pressure. Turning the regulator screw clockwise will increase pressure and counter-clockwise will decrease pressure. Remember -

The high fire DC voltage should read 12V-18V on the HMI.

7. Use the service test menu to lock the unit in low fire: Service > Test Menu > Test Heating > State >

Low Fire . Press Enter.

8. Verify that the unit is in low fire by confirming the voltage to the modulating valve is 0V DC.

9. Locate the bypass screw (under the cap of the valve - location #1, or side of the modulating valve - location #2), refer Figure 27 on page 60 .

10. Adjust the low fire manifold pressure until there is a very thin flame along the entire length of the burner. No dark spots should be seen in the burner. If the flame is too large at low fire, this will decrease the unit’s turndown ratio.

11. The burner may be observed through the view-port located on the external wall of the heater. Replace the cap to the valve. Make sure all wiring and gas components are connected and operational.

12. A final gas leak check shall be performed to verify the gas-tightness of the heater’s components and piping under normal operating conditions. This can be done by measuring the gas pressure at the

1/4” gas plug just downstream of the modulating valve.

59

Pilot

Outlet

Pilot Adjustment

Key (Under Cap)

Inlet

Gas

Dial

Figure 27 - High Fire/Low Fire Bypass Screw Setting

Combination Gas Valve Modulating Valve

Adjustment Screw Location #1

Modulating Valve

Adjustment Screw Location #2

Regulator

Adjusting Screw

Regulator

Vent

Primary

Outlet

Regulator

Adjusting Screw

(High Fire)

Firing Mode

Low Fire = 0-5V DC

Modulation = 5-15V DC

High Fire = 15-24V DC

Bypass Adjustment

(Low Fire)

Natural

Gas

Propane

Gas

Figure 28 - Pressure vs. Firing Rate

Average Manifold Pressure vs. Firing Rate/Ft. of Burner

6.00

5.00

4.00

3.00

2.00

1.00

0.00

-1.00

0 100000 200000 300000 400000 500000

Firing Rate (BTU/Hr/Ft. of Burner)

600000

Final Start-up Procedure

1. With the air and burner systems in full operation and all ducts attached, measure the system airflow.

The motor sheave (pulley) is variable pitch and allows for an increase or decrease of the fan RPM. If an adjustment is needed, refer to

“Pulley Adjustment” on page 54 . Reference Table 10 on page 54

and

“Pulley Combination Chart” on page 56 for adjustment specifications.

2. Once the proper airflow is achieved, measure and record the fan speed with a reliable tachometer.

Caution - Excessive speed will result in motor overloading or bearing failure. Do not set fan

RPMs higher than specified in the maximum RPM chart. See the troubleshooting guide for more information.

3. Measure and record the voltage and amperage to the motor and compare with the motor nameplate to determine if the motor is operating under safe load condition.

4. Once the rpm of the wheel has been properly set, disconnect power and recheck belt tension and

pulley alignment, refer to Figure 23 on page 55 .

60

Sequence of Operation

To better understand the direct-fired heater, it is easier to break the unit out into smaller individual systems.

There are two main systems, a make-up air fan, and a heater. The make-up air fan consists of a blower and motor. The heater may be further broken down into two control systems, the Flame Safety Control

(FSC) and the Modulating Gas System (MGS). The burner mixes air with the gas (Natural or LP), which heats the air.

Flame Safety Control

The first system to understand is the Flame Safety Controller. The FSC is there only to monitor the flame,

NOT to control the temperature. The FSC uses a flame rectification sensor mounted on the pilot assembly to detect the presence of flame in the burner.

Flame strength and presence can be measured at the FSC by reading the rectified flame signal. Use a DC voltage meter, attach meter leads to the test jacks (TP1 and TP2) on the top edge of the FSC. Flame is present when DC voltage reads between 6 and 18V DC. Ideal flame intensity produces a signal of 12V DC or higher. Flame signal may also be read on the HMI by entering Service > Variable Values > Inputs >

Flame Sensor .

The board monitors the flame signal voltage at connector J32 pin 6 (+) and 15 (-). The FSC receives an airflow signal from the MUA Board, which tells it whether there is proper airflow through the unit (not just any airflow, but proper airflow). Proper airflow occurs when there is a 0.15” wc to 0.80” wc differential pressure drop across the burner.

When the airflow through the heater produces differential pressure in this range, the FSC indicates so by illuminating the AIRFLOW LED. The FSC controls the opening of the redundant solenoid gas valves and the operation of the spark igniter to initiate a pilot flame upon start-up.

Figure 29 - Flame Safety Controller

TP1 TP2

DC Voltage Flame Status

0 to 5V DC No Flame

6 to 11V DC Weak Flame

12 to 18V DC Strong Flame

OPR CTRL

AIR FLOW

PTFI

FLAME

ALARM

4 5 3 6 7 8 A 2 S1 S2

61

The OPR CTRL LED indicates that there is power to the FSC. Next, the AIRFLOW LED will come on if there is proper airflow through the unit. Third, the unit will pause to purge any gases or combustible vapors before attempting flame ignition. Then, there is a Pilot Trial For Ignition (PTFI), and the PTFI LED comes on. During PTFI, the FSC opens the pilot gas valve and allows gas to flow to the pilot assembly. At the same moment, the spark igniter is started, causing the spark to ignite the pilot gas. When the flame rod sensor detects the flame, it turns on the FLAME LED, turns off the PTFI LED, and powers the modulating gas system. This is the system’s normal operating mode. The FSC continues to monitor the flame and airflow. Once this occurs, the unit is in the main flame cycle and thus powers the main gas valve and the modulating gas system. This is the normal operating mode. The FSC continues to monitor the flame and airflow.

The last LED on the FSC is the ALARM LED. The alarm will turn on when the FSC determines an unsafe condition has occurred and will not allow the unit to recycle for heat until it has properly been reset.

Anytime the FSC goes into “Alarm” mode, the issue must be diagnosed and corrected to avoid further lockouts after resetting. If the unit fails to light the first time, the unit will try one more time before locking out. This retry will not occur if the No FSC reset option is enabled. To begin troubleshooting, or to reset the

FSC, refer to

“Resetting Unit” on page 78

.

Figure 30 - Proper Spark Gap

1/8” to 3/16”

Proper Spark

Gap

62

Components

The following image and list outline the typical direct fired heater components and their functions.

Figure 31 - Typical Cabinet Components

2 3 4 5

1

9

8

7

SPACE

70°F

OCCUPIED IDLE

6

10

11

12

13

14

15

1.

VFD – Optional component. Adjusts speed of 3-phase motors by changing the frequency signal sent to the motor.

2.

Power Transformer – Optional component. Installed when motor voltage is greater than120V. Used to provide 120V service to controls.

3.

Terminal Strip – Central location to terminate control wiring. Should be used for troubleshooting.

4.

Flame Safety Control – Initiates and monitors flame.

5.

Ignition Transformer – Produces high voltage spark to ignite flame.

6.

HMI – MUA board interface. The 4 buttons are used to navigate through the menu screens.

7.

Make-up Air (MUA) Board – Monitors and outputs electrical signals for components and functions on the unit. Also, the MUA board contains an airflow sensor.

8.

Transformer – 20VA 120V to 24V.

9.

Clogged Filter Switch – Optional component. Senses whether the filters at the intake to the main supply motor are free of dirt and contaminant.

10.

Gas Inlet – Main gas supply connection.

11.

Inlet Gas Pressure Gauge – Inlet gas pressure should be read from here.

12.

Combination Gas Valve – A combination of redundant solenoid valves, pilot valve, and gas regulator built into one unit.

13.

Modulating Gas Valve – Modulates gas flow to the burner to provide proper air temperature.

14.

Manifold Gas Pressure Gauge – Manifold gas pressure should be read from here.

15.

Manual Gas Shut-Off Valve – Allows gas flow to the burner to be shut off to leak-test gas train.

63

Network

NOTE: The board will reboot when altering certain factory settings.

Communication Module (Optional)

The Communication Module, PN: SCADA , is included in all CASlink equipped panels. It obtains operational data from various connected components. This communication wiring is either RS-485 shielded twisted pair wiring or RJ45 Cat 5 Ethernet wiring.

BACnet

BACnet IP or BACnet MS/TP ( Figure 32

) compatibility can be implemented with this package through a

Protocessor, which is a BTL listed embedded Gateway configured to give a Building Management System access to monitor and/or control a list of BACnet objects. The Protocessor is mounted and factory prewired inside the Electrical Control Panel (ECP). Field connections to the Building Management System

(BMS) are shown on wiring schematics.

The Protocessor is preconfigured at the factory to use the field protocol of the Building Management

System in the specific jobsite. BACnet objects can only be accessed through the specified port and protocol.

Figure 32 - BACnet

64

LonWorks

LonWorks compatibility ( Figure 33 ) can be implemented on control packages through the ProtoNode, a

LonMark certified external Gateway configured to give a Building Management System access to monitor and/or control a list of Network Variables. The ProtoNode is mounted and factory pre-wired inside the

Electrical Control Panel. Refer to schematics connections to the Building Management System are shown.

Figure 33 - LonWorks

Commissioning on a LonWorks Network

During the commissioning process by the LonWorks administrator (using a LonWorks Network

Management Tool), the user will be prompted to hit the Service Pin in the ProtoNode. This pin is located in the front face, and it can be pressed by inserting a small screwdriver and tilting it towards the LonWorks

Port. Refer to Figure 34 for location of the “Service Pin.”

If an XIF file is required, it can be obtained by following these steps:

1. Set your computer’s static IP address to 192.168.1.xxx with a subnet mask of 255.255.255.0.

2. Run a Cat 5 connection from the ProtoNode’s Ethernet port to your computer.

3. On any web browser’s URL field, type 192.168.1.24/fserver.xif.

The web browser should automatically download the fserver.xif file or let you save it on your computer.

Save it as fserver.xif.

Figure 34 - LonWorks Service Pin

SE

RVI

CE PIN

NOTE : Insert Small Screwdriver.

Tilt Toward LonWorks Port To

Activate Service Pin.

A0

A1

A2

65

Device Instance, MAC Address, Baud Rate

Some applications may require that the Protocessor have a specific Device Instance, the default device instance is 50,000. To change the Device Instance, you must access the Web Configurator by connecting a computer to the Ethernet port of the Protocessor. The computer used must be assigned a static IP address of 192.168.1.xxx and a subnet mask of 255.255.255.0.

To access the Web Configurator, type the IP address of the Protocessor in the URL of any web browser.

The default IP address of the Protocessor is 192.168.1.24. Once the landing page has loaded, if required, log in using “admin” for the username and password. If the default “admin” password does not work, the gateway should have a printed password on the module’s Ethernet port.

Go to the main configuration page, select “Configure” from the left-hand menu. Select “Profile

Configuration,” the following window shown in Figure 35

should appear.

The MAC address and Baud Rate, used by BACnet MTSP, are editable. The MAC address default is 127, and the Baud Rate default is 38400.

If any changes are made, click on the submit button for each individual change.

Each individual change will require the system to restart.

Figure 35 - Configuration Parameters Page

66

Changing the IP Address

Some BACnet IP applications may require changing the IP address of the Protocessor. To change the IP address, go to the internal server by typing the default IP address of the Protocessor, 192.168.1.24, in the

URL field of any web browser. The computer used must have a static IP address of 192.168.1.xxx. The

window shown in Figure 36

appears. Click on the “Diagnostics and Debugging” button on the lower right corner.

Click on “Setup” from the left-hand side menu and select “Network Settings.” The window shown in

Figure 36

will appear. You can now modify the IP address to whatever is required in the application. Once the IP address has been modified, click on “Update IP Settings.”

Figure 36 - Network Settings Page

67

DDC Control Points

Refer to

page 71

for DDC Notes - 1-5.

BACNET OBJECT NAME ID BACNET TYPE

DDCHeatCommand (1)

DDCCoolCommand1 (1)

DDCCoolCommand2 (1)

DDCCoolCommand3 (1)

DDCBlowerCommand (1)

DDCHeatModulation (1)

3

4

1

2

5

6

Binary Value (BV)

BV

BV

BV

BV

Analog Value (AV)

LON SNVT NAME nviDDCHeat/nvoDDCHeat nviDDCCool1/nvoDDCCool1 nviDDCCool2/nvoDDCCool2 nviDDCCool3/nvoDDCCool3 nviDDCBlow/nvoDDCBlow nviDDCModHeat/nvoDDCModHeat

DDCOccupiedOverride (4)

SchedulingEnabled (4)

HeatTemperModeOcc (2)

HeatTemperModeUnocc (2)

CoolTemperModeOcc (2)

CoolTemperModeUnocc (2)

ActivateOnOcc (2)

ActivateOnUnocc (2)

SpaceHeatHyst (2)

IntakeHeatHyst (2)

SpaceCoolHyst (2)

IntakeCoolHyst (2)

EvapHyst (2)

BlowerModeOcc (2)

BlowerModeUnocc (2)

MixingBoxMode (2)

MixingBoxMinOAPercentOcc (2)

AV

AV

AV

BV

BV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

10

11

12

7

8

9

16

17

18

19

13

14

15

20

21

22

23 nviDDCOccOvrrd/nvoDDCModHeat nviSchedEnabled/nvoSchedEnabled nviHeatModeOcc/nvoHeatModeOcc nvoHeatModeUnocc/nviHeatModeUnocc nviCoolModeOcc/nvoCoolModeOcc nviCoolModeUnocc/nvoCoolModeUnocc nviActOnOcc/nvoActOnOcc nviActOnUnoc/nvoActOnUnoc nviSpaceHeatHyst/nvoSpaceHeatHyst nviInHeatHyst/nvoInHeatHyst nviSpaceCoolHyst/nvoSpaceCoolHyst nviInCoolHyst/nvoInCoolHyst nviEvapHyst/nvoEvapHyst nviBlowModeOcc/nvoBlowModeOcc nviBlowModeUnoc/nvoBlowModeUnoc nviMixingBoxMode/nvoMixingBoxMode nviMBMinOAPerOcc/nvoMBMinOAPOcc

MixingBoxMinOAPercentUnocc (2) 24 AV nviMBMinOAPerUn/nvoMBMinOAPUnoc

MixingBoxMaxOAPercentOcc (2) 25

MixingBoxMaxOAPercentUnocc (2)

MixingBoxMinVoltsOcc (2)

MixingBoxMinVoltsUnocc (2)

MixingBoxMaxVoltsOcc (2)

MixingBoxMaxVoltsUnocc (2)

BlowerVFDMinFreqOcc (2)

BlowerVFDMinFreqUnocc (2)

BlowerVFDMaxFreqOcc (2)

BlowerVFDMaxFreqUnocc (2)

BlowerPWMMinOcc (2)

BlowerPWMMinUnocc (2)

BlowerPWMMaxOcc (2)

BlowerPWMMaxUnocc (2)

IntakeHeatOccSP (3)

IntakeHeatUnoccSP (3)

SpaceHeatOccSP (3)

SpaceHeatUnoccSP (3)

MinDischargeHeatOccSP (3)

26

38

39

40

41

42

34

35

36

37

30

31

32

33

27

28

29

43

MinDischargeHeatUnoccSP (3) 44

DischargeHeatOccSP (3)

DischargeHeatUnoccSP (3)

MaxDischargeHeatOccSP (3)

MaxDischargeHeatUnoccSP (3)

47

48

45

46

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV nviMBMaxOAPerOcc/nvoMBMaxOAPOcc nviMBMaxOAPerUn/nvoMBMaxOAPUnoc nviMBMinVoltsOcc/nvoMBMinOAVOcc nviMBMinVoltsUn/nvoMBMinOAVUnoc nviMBMaxVoltsOcc/nvoMBMaxOAVOcc nviMBMaxVoltsUn/nvoMBMaxOAVUnoc nviVFDMinFreqOcc/nvoVFDMinFreqOcc nviVFDMinFUnocc/nvoVFDMinFUnocc nviVFDMaxFreqOcc/nvoVFDMaxFreqOcc nviVFDMaxFUnocc/nvoVFDMaxFUnocc nviPWMMinOcc/nvoPWMMinOcc nviPWMMinUnocc/nvoPWMMinUnocc nviPWMMaxOcc/nvoPWMMaxOcc nviPWMMaxUnocc/nvoPWMMaxUnocc nviInHeatOccSP/nvoInHeatOccSP nviInHeatUnocSP/nvoInHeatUnocSP nviSpHeatOccSP/nvoSpHeatOccSP nviSpHeatUnocSP/nvoSpHeatUnocSP nviMinDHeatOccSP/nvoMinDHeatOccSP nviMinDHeatUnoSP/nvoMinDHeatUnoSP nviDisHeatOccSP/nvoDisHeatOccSP nviDisHeatUnocSP/nvoDisHeatUnocSP nviMaxDHeatOccSP/nvoMaxDHeatOccSP nviMaxDHeatUnoSP/nvoMaxDHeatUnoSP

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

FUNCTION

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

DESCRIPTION

Heating command, requires heat tempering mode = DDC

Cooling stage 1 command, requires cool tempering mode = DDC



Blower command, requires both heat and cool tempering modes = DDC

Heat modulation signal, 0-10V where 0V = low fire and 10V = high fire.

Requires heat tempering mode = DDC

Occupied override command, requires SchedulingEnabled = ON(1)

Enable scheduling

Heat tempering mode during occupied time

Heat tempering mode during unoccupied time

Cool tempering mode during occupied time

Cool tempering mode during unoccupied time

"Activate based on" during occupied time

"Activate based on" during unoccupied time

Space Heating Hysteresis

Intake Heating Hysteresis

Space Cooling Hysteresis

Intake Cooling Hysteresis

Evap Cooling Hysteresis

Blower mode during occupied times

Blower mode during unoccupied times

Mixing box mode

Min occupied outdoor air percent when mixing box mode = outdoor air percent

Min unoccupied outdoor air percent when mixing box mode = outdoor air percent

Max occupied outdoor air percent when mixing box mode = outdoor air percent

Max unoccupied outdoor air percent when mixing box mode = outdoor air percent

Min occupied mixing box voltage when mixing box mode = manual

Min unoccupied mixing box voltage when mixing box mode = manual

Max occupied mixing box voltage when mixing box mode = manual

Max unoccupied mixing box voltage when mixing box mode = manual

Min blower VFD Frequency when occupied

Min blower VFD Frequency when unoccupied

Max blower VFD Frequency when occupied

Max blower VFD Frequency when unoccupied

Min blower ECM speed when occupied

Min blower ECM speed when unoccupied

Max blower ECM speed when occupied

Max blower ECM speed when unoccupied

Intake Heating Occupied Setpoint

Intake Heating Unoccupied Setpoint

Space Heating Occupied Setpoint

Space Heating Unoccupied Setpoint

Min Discharge Heating when occupied, relevant only if heat tempering mode

= space

Min Discharge Heating when unoccupied, relevant only if heat tempering mode

= space

Discharge heating setpoint when occupied, requires heat tempering mode

= discharge

Discharge heating setpoint when unoccupied, requires heat tempering mode

= discharge

Max Discharge Heating when occupied, relevant only if heat tempering mode

= space

Max Discharge Heating when unoccupied, relevant only if heat tempering mode

= space

68

ID

93

94

95

96

89

90

91

92

85

86

87

88

81

82

83

84

101

102

103

104

105

97

98

99

100

77

78

79

80

73

74

75

76

69

70

71

72

65

66

67

68

61

62

63

64

57

58

59

60

53

54

55

56

49

50

51

52

BACNET OBJECT NAME

ScheduleWednesdayBStart (4)

ScheduleWednesdayBEnd (4)

ScheduleWednesdayCStart (4)

ScheduleWednesdayCEnd (4)

ScheduleThursdayAStart (4)

ScheduleThursdayAEnd (4)

ScheduleThursdayBStart (4)

ScheduleThursdayBEnd (4)

ScheduleThursdayCStart (4)

ScheduleThursdayCEnd (4)

ScheduleFridayAStart (4)

ScheduleFridayAEnd (4)

ScheduleFridayBStart (4)

ScheduleFridayBEnd

ScheduleFridayCStart (4)

ScheduleFridayCEnd (4)

ScheduleSaturdayAStart (4)

ScheduleSaturdayAEnd (4)

ScheduleSaturdayBStart (4)

ScheduleSaturdayBEnd (4)

ScheduleSaturdayCStart (4)

ScheduleSaturdayCEnd (4)

BlowerManualFreqOcc (2)

BlowerManualFreqUnocc (2)

BlowerManualPwmRateOcc (2)

IntakeCoolOccSP (3)

IntakeCoolUnoccSP (3)

SpaceCoolOccSP (3)

SpaceCoolUnoccSP (3)

IntakeCoolStagingDiffOcc (3)

IntakeCoolStagingDiffUnocc (3)

SpaceCoolStagingDiffOcc (3)

SpaceCoolStagingDiffUnocc (3)

RoomOverrideOccSP (3)

RoomOverrideUnoccSP (3)

OAEvapCoolOccSP (3)

OAEvapCoolUnoccSP (3)

ScheduleSundayAStart (4)

ScheduleSundayAEnd (4)

ScheduleSundayBStart (4)

ScheduleSundayBEnd (4)

ScheduleSundayCStart (4)

ScheduleSundayCEnd (4)

ScheduleMondayAStart (4)

ScheduleMondayAEnd (4)

ScheduleMondayBStart (4)

ScheduleMondayBEnd (4)

ScheduleMondayCStart (4)

ScheduleMondayCEnd (4)

ScheduleTuesdayAStart (4)

ScheduleTuesdayAEnd (4)

ScheduleTuesdayBStart (4)

ScheduleTuesdayBEnd (4)

ScheduleTuesdayCStart (4)

ScheduleTuesdayCEnd (4)

ScheduleWednesdayAStart (4)

ScheduleWednesdayAEnd (4)

LON SNVT NAME nviInCoolOccSP/nvoInCoolOccSP nviInCoolUnocSP/nvoInCoolUnocSP nviSpCoolOccSP/nvoSpCoolOccSP nviSpCoolUnocSP/nvoSpCoolUnocSP nviInCoolStDifOc/nvoInCoolStDifOc nviInCoolStDifUn/nvoInCoolStDifUn nviSpCoolStDifOc/nvoSpCoolStDifOc nviSpCoolStDifUn/nvoSpCoolStDifUn nviRoomOvOccSP/nvoRoomOvOccSP nviRoomOvUnocSP/nvoRoomOvUnocSP nviOAEvaCoolOCSP/nvoOAEvaCoolOCSP nviOAEvaCoolUnSP/nvoOAEvaCoolUnSP nviSundayAStart/nvoSundayAStart nviSundayAEnd/nvoSundayAEnd nviSundayBStart/nvoSundayBStart nviSundayBEnd/nvoSundayBEnd nviSundayCStart/nvoSundayCStart nviSundayCEnd/nvoSundayCEnd nviMondayAStart/nvoMondayAStart nviMondayAEnd/nvoMondayAEnd nviMondayBStart/nvoMondayBStart nviMondayBEnd/nvoMondayBEnd nviMondayCStart/nvoMondayCStart nviMondayCEnd/nvoMondayCEnd nviTuesdayAStart/nvoTuesdayAStart nviTuesdayAEnd/nvoTuesdayAEnd nviTuesdayBStart/nvoTuesdayBStart nviTuesdayBEnd/nvoTuesdayBEnd nviTuesdayCStart/nvoTuesdayCStart nviTuesdayCEnd/nvoTuesdayCEnd nviWedAStart/nvoWedAStart nviWedAEnd/nvoWedAEnd nviWedBStart/nvoWedBStart nviWedBEnd/nvoWedBEnd nviWedCStart/nvoWedCStart nviWedCEnd/nvoWedCEnd nviThursAStart/nvoThursAStart nviThursAEnd/nvoThursAEnd nviThursBStart/nvoThursBStart nviThursBEnd/nvoThursBEnd nviThursCStart/nvoThursCStart nviThursCEnd/nvoThursCEnd nviFridayAStart/nvoFridayAStart nviFridayAEnd/nvoFridayAEnd nviFridayBStart/nvoFridayBStart nviFridayBEnd/nvoFridayBEnd nviFridayCStart/nvoFridayCStart nviFridayCEnd/nvoFridayCEnd nviSatAStart/nvoSatAStart nviSatAEnd/nvoSatAEnd nviSatBStart/nvoSatBStart nviSatBEnd/nvoSatBEnd nviSatCStart/nvoSatCStart nviSatCEnd/nvoSatCEnd nviBlowManFreqOc/nvoBlowManFreqOc nviBlowManFreqUn/nvoBlowManFreqUn nviBlowManPwmOc/nvoBlowManPwmOc

BACNET TYPE

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

AV

FUNCTION

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

DESCRIPTION

Intake Cooling Occupied Setpoint

Intake Cooling Unoccupied Setpoint

Space Cooling Occupied Setpoint

Space Cooling Unoccupied Setpoint

Intake Cooling Stage Differential Setpoint when occupied

Intake Cooling Stage Differential Setpoint when unoccupied

Space Cooling Stage Differential Setpoint when occupied

Space Cooling Stage Differential Setpoint when unoccupied

Room Override Occupied Setpoint

Room Override Unoccupied Setpoint

Outdoor air evap cooling occupied setpoint

Outdoor air evap cooling unoccupied setpoint

Daily schedule start/end time in minutes










































VFD frequency when occupied, requires blower control = VFD manual

VFD frequency when unoccupied, requires blower control = VFD manual

ECM speed when occupied, requires blower control = ECM manual

69

BACNET OBJECT NAME

BlowerManualPwmRateUnocc (2)

MixingBoxManualOAOcc (2)

ID

106

107

MixingBoxManualOAUnocc (2) 108

MixingBoxManualVoltsOcc (2) 109

110

138

139

140

141

134

135

136

137

130

131

132

133

126

127

128

129

146

147

148

149

142

143

144

145

150

151

122

123

124

125

118

119

120

121

114

115

116

117

111

112

113

152

153

154

MixingBoxManualVoltsUnocc (2)

DryModeDischTempSpOcc (3)

DryModeDischTempSpUnocc (3)

StaticPressureLowOcc (2)

StaticPressureLowUnocc (2)

StaticPressureHighOcc (2)

StaticPressureHighUnocc (2)

OutdoorStatTemp (5)

ReturnStatTemp (5)

DischargeStatTemp (5)

IntakeStatTemp (5)

SpaceStatTemp (5)

Hmi0Temp (5)

Hmi1Temp (5)

Hmi2Temp (5)

Hmi3Temp (5)

Hmi4Temp (5)

IntakeRh (5)

SpaceRh (5)

AdjustableDamperPosition (2)

Hmi0Rh (5)

Hmi1Rh (5)

Hmi2Rh (5)

Hmi3Rh (5)

Hmi4Rh (5)

ActiveFault0Id (5)

ActiveFault1Id (5)

ActiveFault2Id (5)

ActiveFault3Id (5)

ActiveFault4Id (5)

ActiveFault5Id (5)

CurrentHvacState (5)

OccupiedbySchedule (4)

OccupiedbyInput (5)

OccupiedbyDDC (5)

OccupiedbyHMIOverride (5)

CurrentOccupiedStatus (5)

CalculatedAverageSpaceTemp (5)

BlowerVFDFrequency (5)

BlowerVFDCurrent (5)

BlowerVFDPower (5)

CalculatedAverageRh (5)

GasValveOutput

CFMReading

StaticPressure

BACNET TYPE

AV

AV

AV

LON SNVT NAME nviBlowManPwmUn/nvoBlowManPwmUn nviMixBoxManOAOc/nvoMixBoxManOAOc nviMixBoxManOAUn/nvoMixBoxManOAUn nviMixBoxManVOc/nvoMixBoxManVOc nviMixBoxManVUn/nvoMixBoxManVUn nviDryDischTSpOc/nvoDryDischTSpOc nviDryDischTSpUn/nvoDryDischTSpUn nviStatPLowOcc nviStatPLowUnoc nviStatPHighOcc nviStatPHighUnoc nvoOutdoorTemp nvoReturnTemp nvoDischargeTemp nvoIntakeTemp nvoSpaceTemp nvoHmi0Temp nvoHmi1Temp nvoHmi2Temp nvoHmi3Temp nvoHmi4Temp nvoIntakeRh nvoSpaceRh nvoDampPosition nvoHmi0Rh nvoHmi1Rh nvoHmi2Rh nvoHmi3Rh nvoHmi4Rh nvoActiveFault0 nvoActiveFault1 nvoActiveFault2 nvoActiveFault3 nvoActiveFault4 nvoActiveFault5 nvoCurrentState nvoOccbySchedule nvoOccbyInput nvoOccbyDDC nvoOccbyHMI nvoOccStatus nvoAvgSpaceTemp nvoBlowVFDFreq nvoBlowVFDAmps nvoBlowVFDPower nvoAvgRh nvoGasOutput nvoCFMReading nvoStaticPress

AV

AV

AV

AV

AV

AI

AV

AV

AV

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

AI

Read/Write

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read/Write

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

Read Only

FUNCTION

Read/Write

Read/Write

Read/Write

Read/Write

DESCRIPTION

ECM speed when unoccupied, requires blower control = ECM manual

Mixing Box Outdoor Air Percent during occupied times, requires mixing box mode = outdoor air percent

Mixing Box Outdoor Air Percent during unoccupied times, requires mixing box mode = outdoor air percent

Mixing Box damper voltage during occupied times, requires mixing box mode

= manual

Mixing Box damper voltage during unoccupied times, requires mixing box mode

= manual

Dry mode discharge temperature setpoint when occupied

Dry mode discharge setpoint when unoccupied

Static Pressure Low setpoint when occupied

Static Pressure Low setpoint when unoccupied

Static Pressure High setpoint when occupied

Static Pressure High setpoint when unoccupied

Outdoor temperature

Return temperature

Discharge temperature

Intake temperature

Space temperature (thermistor)

Unit HMI temperature

Remote HMI 1 temperature




Intake relative humidity

Space relative humidity

Mixing Box Damper signal

Unit HMI relative humidity

Remote HMI 1 relative humidity




Active Fault Code (see fault code table)






HVAC State (Idle = 0, Blower = 1, Heating = 2, Cooling = 3)

Occupied due to the schedule

Occupied due to hardware input

Occupied due to DDC command

Occupied due to HMI command

Occupancy status, occupied = 1, unoccupied = 0

Average space temperature

Blower VFD frequency

Blower VFD current

Blower VFD power

Average space relative humidity

Controller output to the modulating gas valve.

0% = Low Fire, 100% = High Fire

Fan CFM Reading

Static Pressure

70

DDC Notes

(1) Full Control Points

• Use only if Heating and/or Cooling tempering mode has been set to “DDC” through the unit’s HMI.

• Setting the Heating and Cooling modes to “DDC” disables temperature based activation of these functions. The preferred heating and cooling activation method is to use space and/or intake temperatures along with unit setpoints.

• Heating and Cooling cannot be called for at the same time.

• The Fan Control point will only work if the heating or cooling mode is set to DDC.

(2) Factory Setting Points

• Avoid writing to these on a regular basis.

• The Allow Schedule point tells the unit whether scheduling is allowed or not. It is NOT an occupancy command.

• Unit Status: 0 = Idle, 1 = Blower, 2 = Heating, 3 = Cooling

• OA Mode: 0 = Off, 1 = Manual, 2 = 2 Position, 3 = OA Percent, 4 = Analog Ctrl, 5 = PS, 6 = 100% OA,

7 = Modes

• Occupancy Status: 0 = OFF, 1 = ON

• Heat Tempering Mode Occ: 0 = Discharge, 1 = Space, 2 = BAS, 3 = DDC

• Activate Based ON Occ: 0 = Intake, 1 = Space, 2 = Both, 3 = Either, 4 = Stat

• Cool Tempering Mode Occ: 0 = Intake, 1 = Space, 2 = BAS, 3 = DDC

• Heat Tempering Mode Unocc: 0 = Discharge, 1 = Space, 2 = BAS, 3 = DDC

• Activate Based ON Unocc: 0 = Intake, 1 = Space, 2 = Both, 3 = Either, 4 = Stat

• Cool Tempering Mode Unocc: 0 = Intake, 1 = Space, 2 = BAS, 3 = DDC

• Blower Mode Occ: 0 = Auto, 1 = OFF, 2 = ON

• Blower Mode Unocc: 0 = Auto, 1 = OFF, 2 = ON

(3) Temperature Setpoints

• The preferred method for DDC control is through setpoint manipulation. Use the setpoints shown above along with the “DDC Occupied Override” point in the Runtime settings section to control the blower and to determine when to heat or cool.

• Temperatures can be in degrees F or degrees C, depending on the “Temp Units” point in the factory settings.

(4) On-Board Scheduling

• Values are based on minutes in a day. 1439 minutes = 11:59 PM, 0 = 12:00AM.

• The end value of the A set or B set must be greater than or equal to the start value in that set (A start

<= A end, B start <= B end).

• The B set must be greater than the A set and cannot overlap it (A end <= B start).

• The value 1440 is a special value meaning that there is no scheduling for that set. Both the start and end value of a set must have the value for it to be valid. If the A set has this value, the B set must also have this value (no scheduling for the entire day).

NOTE: The preferred method for a BMS to control occupancy is through the “DDC Occupied

Override” binary point. The “On-Board Schedule” points should all be set to unoccupied (1440) if the “DDC Occupied Override” is used.

(5) Sensor Values and Alerts

• For Alert Codes 0-5, refer to

“DDC Fault List” on page 72 .

71

DDC Fault List

Fault

Description

None

FireDetect

SmokeDetect

SupplyOverload

ExhaustOverload

MasterRomCrc

AuxRomCrc

FlameProving

IntakeFirestat

DischargeFirestat

Freezestat

HighTempLimit

FireEyeAlarm

GasHighPs

GasLowPs

AuxGasHighPs

AuxGasLowPs

CoAlarm

EvapWaterPs

EvapFloat

DxFloat

FurnaceFloat

BlowerVfdMbComm

DoorInterlock

MuaToAuxMbComm

IntakeDamperEnd

DischargeDamperEnd

BlowerAirProving

CloggedFilter

MissingSensorIntake

BrokenSensorIntake

MissingSensorDischarge

BrokenSensorDischarge

MissingSensorSpace

BrokenSensorSpace

MissingSensorOutsideAir

BrokenSensorOutsideAir

MissingSensorReturn

29

30

31

32

23

24

26

27

28

33

34

35

36

19

20

21

22

15

16

17

18

10

12

13

14

7

8

9

Fault

Number

0

1

2

5

6

3

4

37

38

39

Fault

Description

BrokenSensorReturn

RtcTempSensor

AuxRtcTempSensor

Hmi0TempInvalid

Hmi1TempInvalid

Hmi2TempInvalid

Hmi3TempInvalid

Hmi4TempInvalid

ProofOfClosure

LowFlameVoltage

SpPressureLowLimit

SpPressureHighLimit

SpaceRh

IntakeRh

DischargeRh

HmiMbComm0

HmiMbComm1

HmiMbComm2

HmiMbComm3

HmiMbComm4

Co2ShutdownRequired

Co2Override

Vfd571IgbtTemp

Vfd571Output

Vfd571Ground

Vfd571Temp

Vfd571FlyingStart

Vfd571HighDcBus

Vfd571LowDcBus

Vfd571Overload

Vfd571Oem

Vfd571IllegalSetup

Vfd571DynamicBrake

Vfd571PhaseLost

Vfd571External

Vfd571Control

Vfd571Start

Vfd571IncompatParamSet

132

133

134

135

127

128

129

130

131

136

137

138

139

95

96

121

122

88

92

93

94

58

59

86

87

55

56

57

Fault

Number

40

49

50

51

52

53

54

140

141

142

Fault

Description

Vfd571EpmHw

Vfd571Internal1

Vfd571Internal2

Vfd571Internal3

Vfd571Internal4

Vfd571Internal5

Vfd571Internal6

Vfd571Internal7

Vfd571Internal8

Vfd571Personality

Vfd571Internal10

Vfd571RemoteKeypadLost

Vfd571AssertionLevel

Vfd571Internal11

Vfd571Internal12

Vfd571Internal13

Vfd571Internal14

Vfd571CommModuleFail

Vfd571Network

Vfd571Network1

Vfd571Network2

Vfd571Network3

Vfd571Network4

Vfd571Network5

Vfd571Network6

Vfd571Network7

Vfd571Network8

Vfd571Network9

ReturnRh

OutsideRh

Co2Threshold

ErvDoorInterlock

ExternalInterlockActive

ExhFanContactor1Prv

ExhFanContactor2Prv

170

171

173

174

165

166

167

168

169

175

176

182

183

161

162

163

164

157

158

159

160

150

151

152

153

154

155

156

Fault

Number

143

144

145

146

147

148

149

72

Troubleshooting

The following table lists causes and corrective actions for possible problems with the fan units. Review this list prior to consulting manufacturer. The following table lists causes and corrective actions for possible problems with the fan units. Review this list before consulting manufacturer.

Airflow Troubleshooting Chart

Problem

Fan Inoperative

Motor Overload

Insufficient Airflow

Potential Cause

Blown fuse/Open circuit breaker

Disconnect switch in “OFF” position

Incorrect wiring to motor

Broken fan belt

Motor starter overloaded

Incorrect fan rotation

Fan speed is too high

Incorrect wiring to motor

Overload in starter set too low

Motor HP too low

Duct static pressure lower than design

Incorrect fan rotation

Poor outlet conditions

Intake damper not fully open

Duct static pressure higher than design

Blower speed too low

Supply grills or registers closed

Dirty/clogged filters

Corrective Action

Check amperage.

Check fuse, replace if needed.

Check circuit breaker.

Place switch to the “ON” position.

Inspect motor wiring. Verify connections with wiring diagram located on fan motor.

Replace belt.

Check amperage.

Reset starter.

Verify that the fan is rotating in the direction shown on rotation label.

Reduce fan RPM.

Inspect motor wiring. Verify connections with wiring diagram located on fan motor.

Set overload to motor’s FLA value.

Determine if HP is sufficient for job.

Reduce fan RPM.

Verify that the fan is rotating in the direction shown on rotation label.

Check duct and connections. There should be a straight duct connection to the outlet.

Inspect damper linkage. If the linkage is damaged, replace damper motor.

Check ductwork. Adjust/resize to eliminate or reduce duct losses.

Increase fan RPM. Do not overload motor.

Open/Adjust.

Clean filters. Replace filters if they cannot be cleaned or are damaged.

Adjust belt tension.

Reduce fan RPM.

Install filters.

Reduce fan RPM.

Excessive Airflow

Belt slippage

Blower speed too high

Filters not installed

Duct static pressure lower than design

Excessive Vibration and

Noise

Damaged/Unbalanced wheel Replace wheel.

Misaligned pulleys

Fan is operating in unstable region of fan curve

Align pulleys.

Refer to performance curve for fan.

Bearings need lubrication/Damaged bearing Lubricate bearings, replace if damaged.

Fan speed is too high Reduce fan RPM.

Dirty/oily belt(s)

Belt(s) too loose

Worn belt(s)

Clean belt(s).

Adjust, replace if necessary.

Replace belt(s).

73

Burner Troubleshooting

Problem

Pilot Does Not Light/Stay Lit

Main Burner Does Not Light

(Pilot is lit)

Not Enough Heat

Too much heat

Potential Cause Corrective Action

Main gas is off

Air in gas line

Dirt in pilot orifice

Gas pressure out of range

Pilot valve is off

Leak at pilot orifice

Excessive drafts

Safety device has cut power

Open main gas valve.

Purge gas line.

Clean orifice with compressed air.

Adjust to proper gas pressure.

Turn pilot valve on.

Tighten pilot orifice.

Redirect draft away from unit.

Check limits and airflow sensor.

Dirty flame sensor

Defective flame rod

No call for heat

Clean flame sensor.

Replace flame rod.

Adjust heat setpoint.

No spark at igniter

Check wiring, sensor, and ignition controller. Check spark gap, refer to


.

Replace combination valve.

Defective valve

Loose valve wiring

Shut off valve closed

Check wiring to valve.

Open shut off valve.

Defective flame safety controller Replace flame safety controller.

Pilot fails as main gas valve opens, and main gas flows.

Main gas pressure too low

Plug the first burner port next to the pilot gas tube with burner cement.

Increase main gas pressure - do not exceed 14 inches wc inlet pressure (5 PSI on size 4-5 heater).

Too much airflow

Burner undersized

Decrease airflow if possible.

Check design conditions.

Gas controls not wired properly Check wiring.

Heat setpoint too low Increase heat setpoint.

Faulty HMI Sensor

Faulty Discharge Sensor

Replace HMI.

Check wiring. Replace sensor.

Unit locked into low fire Check wiring.

Defective modulating gas valve Check/replace modulating valve.

Heat setpoint too high

Unit locked into high fire

Faulty HMI Sensor

Faulty Discharge Sensor

Decrease heat setpoint.

Check wiring.

Replace HMI.

Check wiring. Replace sensor.

74

HMI Fault Codes

Fault

Fire Detect

Smoke Detect

Supply Overload

Exhaust Overload

Master ROM CRC

Flame Lockout

Intake Firestat

Discharge Firestat

Freezestat

High Temp Limit setpoint.

The discharge temperature was below the freezestat temperature setpoint for the duration of the freezestat timer setpoint.

Potential Cause

The board is receiving an input from the fire detector.

The board is receiving an input from the smoke detector.

Motor overload has tripped.

Software mismatch.

The Flame Safety Control (FSC) verifies that airflow is sensed by the airflow sensor.

Intake temperature exceeds the firestat

Discharge temperature exceed the firestat setpoint.

Unit discharge temperature exceeds maximum limit.


Fire possibly present.

Check wiring. Repair broken or loose wiring connections.

Faulty fire detector, replace fire detector.

Verify the smoke detector functionality.


Faulty smoke detector, replace smoke detector.

Check motor for debris.

Check contactor/motor wiring connections.

Check overload reset button.

Check overload amperage setting.

Check motor bearings.

Contact technical support.

Verify spark gap, refer to


.

Faulty flame rod.

Faulty FSC, replace FSC.

Inspect intake area of the unit for unexpected heat source.

Reset fault with HMI.

Check for faulty regulators or modulating valves.


Inspect discharge area of the unit for unexpected heat source.

Check gas pressure.

Check for proper burner firing.

Check discharge sensor values. Go to

Service Settings > Temperatures>

Discharge .


Check for proper airflow.

Measure discharge sensor (ohm reading should be 10k @ 77°F).

75

Fault

Fire Eye Alarm

Gas High PS

Gas Low PS

CO Alarm

Evap Water PS

Evap Float

DX Float

Fireye detected improper burner operation.

The board lost input on the gas pressure high terminal. There should be an input when gas pressure is at the proper level.

The board lost input on the gas pressure low terminal. There should be an input when gas pressure is at the proper level.

The board is receiving an input from the

CO detector.

Potential Cause Corrective Action

Gas is off, turn gas on.

Faulty ignition transformer, replace transformer.

Faulty Fireye, replace Fireye.

Improper flame/lighting, refer to “Burner

Troubleshooting” on page 74 .

Adjust regulator or add regulator.


Faulty high pressure gas switch, replace the switch.


Faulty low pressure gas switch, replace the switch.

Check for proper exhaust ventilation.


Faulty CO detector, replace CO detector.

Drain Closed - Water pressure should be present. The board should not receive

120VAC. A fault will occur if 120VAC is present for 5 seconds.

Drain Open - Water pressure should not be present. The board should receive

120VAC. A fault will occur if 120VAC is not present for 15 seconds.

Verify freeze protection kit is installed.

Check freeze protection kit is operational.

Input signal from the evap float switch lost.

Input signal from the drain pan float switch lost.

Supply VFD Comm Modbus communication fault.


Clogged drain.

Faulty float switch, replace switch.

Make sure the pan drain is clear and water is draining.


Faulty float switch, replace the switch.

Check Modbus wiring and connections.

Verify Modbus address.

Verify Min and Max settings of the VFD to the MUA board settings. Go to Factory

Settings > Unit Options > Blower

Config > VFD Freq Limits .

76

Intake Damper

End

Discharge Damper

End

Missing Sensor

Intake/Discharge/

Space/Outside Air/

Return

Broken Sensor

Intake/Discharge/

Space/Outside Air/

Return

Fault

Door Interlock

Supply (Blower) Air

Proving

Clogged Filter

Potential Cause

Safety feature that will shut down supply fan when door signal lost.

End limit input not received.


Verify door is closed.


Faulty door switch, replace the switch.


Board damper output/input failed.

Faulty damper, Replace damper.

Airflow proving pressure value outside of setpoint limits.

Input for clogged filters activated.

When a sensor is not wired or there is an open circuit.

Kinked/blocked/damaged hose.

Blockage in duct.

Confirm proper CFM.

Faulty airflow sensor, replace sensor.

Burner profile pressure out of range.

Clean or replace filters.

Check clogged filter switch adjustment.

Faulty clogged filter switch, replace the switch.


Install missing sensor.

Replace faulty sensor.

Check wiring. Repair grounded wiring.

Sensor or wiring shorted to ground.

Faulty sensor, replace sensor.

HMI Temp Invalid

Proof of Closure

HMI MB Comm

CO2 Override

Verify there is no damage to the IBT board or the wiring to the IBT board.

HMI internal temperature sensor readings incorrect.

High source of CO2, above PPM threshold.

Replace HMI.

Input not received when there is a call for heat.

HMI communication fault or software setting.


Faulty gas valve, replace gas valve.


Improper flame. Adjust pilot and low fire settings.

Faulty Fireye, replace Fireye.

Improper software setting.

Faulty Cat 5 cable, replace cable.

Faulty HMI, replace the HMI.

Check for proper exhaust ventilation.

77

VFD Fault List

Refer to VFD manufacturer manual for further details.

Fault Number

0

1

2

5

6

3

4

11

12

13

14

7

8

9

10

15

16

17

18 - 27

28

29

30 - 33

34

35 - 44

Description

No Fault

IGBT Temperature Fault

Output Fault

Ground Fault

Temperature Fault

Flying Start Fault

High DC BUS

Low DC BUS

Overload Fault

OEM Fault

Illegal Setup Fault

Dynamic Brake Fault

Phase Lost

External Fault

Control Fault

Start Fault

Incompatible Parameter Set

EPM Hardware Fault

Internal Fault

Remote Keypad Lost

Assertion Level Fault

Internal Fault

Comm. Module Failure

Network Fault

Resetting Unit

If the flame safety control is locked out (alarm light on), reset the unit by:

1. Press the FSC Reset push-button, refer to

Figure 37 . If pressing the reset fails, continue to step 2.

2. Turn OFF power to the unit.

3. Turn power to the unit back ON.

Figure 37 - Reset Buttons (MUA Board)

HI TEMP

LIM

FSC

RESET

!

78

MAINTENANCE

To guarantee trouble-free operation of this heater, the manufacturer suggests following these guidelines.

Most problems associated with fan failures are directly related to poor service and maintenance.

Please record any maintenance or service performed on this fan in the documentation section located at the end of this manual.

WARNING: DO NOT ATTEMPT MAINTENANCE ON THE HEATER UNTIL THE ELECTRICAL SUPPLY

HAS BEEN COMPLETELY DISCONNECTED AND THE MAIN GAS SUPPLY VALVE HAS BEEN SHUT

OFF.

General Maintenance

1. Fan inlet and approaches to ventilator should be kept clean and free from any obstruction.

2. All fasteners and electrical connections should be checked for tightness each time maintenance checks are performed before restarting unit.

3. These units require very little attention when moving clean air. Occasionally oil and dust may accumulate, causing imbalance. If the fan is installed in a corrosive or dirty atmosphere, periodically inspect and clean the wheel, inlet, and other moving parts to ensure smooth and safe operation.

4. Motors are normally permanently lubricated. Caution: Use care when touching the exterior of an operating motor. Components may be hot enough to burn or cause injury.

5. If bearings require lubrication, very little is needed. A general rule is one-half pump from a grease gun for 1/2” to 1-7/16” shaft diameters and one full pump for 1-11/16” and large diameter shafts for every

1500 to 3000 hours of operation. A lithium-based grease should be used. Bearings should be rotated as they are lubricated to evenly distribute the grease, either by hand or via extended grease lines. Do not attempt to grease bearings from inside the enclosure while the motor is energized. Caution:

Bearings are sealed, over-greasing can cause damage to the bearings. Do not grease until grease comes out of seals. Only add the appropriate amount of grease.

2 Weeks After Start-up

1. Belt tension should be checked after the first 2 weeks of fan operation.

See “Pulley Alignment/

Proper Belt Tension” on page 55.

2. All fasteners should be checked for tightness each time maintenance checks are performed before restarting unit.

Every 3 Months

1. Belt tension should be checked quarterly. See “Pulley Alignment/Proper Belt Tension” on page 55.

Over-tightening will cause excessive bearing wear and noise. Too little tension will cause slippage at start-up and uneven wear.

2. Filters need to be cleaned and/or replaced quarterly, and more often in severe conditions. Washable filters can be washed in warm soapy water. When re-installing filters, be sure to install with the airflow in the correct direction as indicated on the filter.

Yearly

1. Inspect bearings for wear and deterioration. Replace if necessary.

2. Inspect belt wear and replace torn or worn belts.

3. Inspect bolts and set screws for tightness. Tighten as necessary.

4. Inspect motor for cleanliness. Clean exterior surfaces only. Remove dust and grease from the motor housing to ensure proper motor cooling. Remove dirt from the wheel and housing to prevent imbalance and damage.

5. Check for gas leak and repair if present.

6. Clean flame sensor by rubbing with steel wool to remove any rust build-up.

7. For heating season, inspect the burner assembly. Refer to

“Burner Maintenance” on page 80

. For cooling season, inspect the cooling module. Refer to cooling manufacturer’s recommendations.

79

Burner Maintenance

Burner maintenance should be performed annually when entering heating season.

1. Verify the unit is off.

2. Inspect the pilot assembly, refer to “Pilot Adjustment” on page 58

. Replace if required.

3. Inspect the burner plates.

4. Clean the burner plates. Make sure the baffles are secure and attached to the burner.

5. Clean burner with wire brush and make sure the burner ports are free of debris. Refer to Table 11

for drill size(s) to clear ports. Wipe the burner with a clean rag.

6. After cleaning the system, turn the system. Visually inspect the flame.

Table 11 - Burner Orifice Drill Size

Orifice

Gas Port

Air Port

Drill Size

1/8”

42

Unit Filters

Intake

Table 12 - Filter Quantity Chart

Size 1 Standard Sloped

Size 2 Standard Sloped

Size 1 Modular Sloped





Size 1 V-Bank

Size 2 V-Bank

Size 3 V-Bank

Size 4 V-Bank

Size 5 V-Bank

Size 1 Inline

Size 2 Inline

Size 3 Inline

16” x 20”

2

3

6

10

8

15

1

20” x 25”

2

3

8

3

8

12

1

2

80

Emergency Shutdown of Unit

To shutdown the unit in the event of an emergency, do the following:

1. Turn power OFF to the unit from main building disconnect.

2. Turn the external disconnect switch to the OFF position.

3. CLOSE the inlet gas valve located on the heater.

Prolonged Shutdown of Unit

For prolonged shutdown, the following steps should be done:

1. Turn the external disconnect switch to the OFF position.

2. CLOSE the inlet gas valve located on the heater.

To re-start the unit, the following steps should be done:

1. Turn the external disconnect switch to the ON position.

2. OPEN the inlet gas valve located on the heater.

81

Notes

82

CLEANING & MAINTENANCE RECORD

Date Service Performed

83

Start-Up Documentation

START-UP AND MEASUREMENTS SHOULD BE PERFORMED AFTER THE SYSTEM HAS BEEN AIR

BALANCED AND WITH THE HEAT ON (Warranty will be void without completion of this form)

Job Information

Job Name

Address

City

State

Zip

Phone Number

Fax Number

Contact

Purchase Date

Service Company

Address

City

State

Zip

Phone Number

Fax Number

Contact

Start-up Date

Heater Information

Refer to the start-up procedure in this manual to complete this section.

Name Plate and Unit Information

Model Number

Serial Number

Hardware Rev.

Software Rev.

Motor Volts

Motor Hertz

Motor Phase

Motor FLA

Motor HP

Blower Pulley

Motor Pulley

Belt Number

Min. Btu/Hr

Max. Btu/Hr

Gas Type

Field Measure Information

Motor Voltage

Motor Amperage**

RPM

Burner Differential Pressure

Pilot Flame Signal

Low Fire Flame Signal

High Fire Flame Signal

High Fire Inlet Gas Pressure

Inches WC

VDC

VDC

VDC

Inches WC

Low Fire Manifold Gas Pressure Inches WC

High Fire Manifold Gas Pressure Inches WC

Thermostat Setpoint

Gas Type

Temperature Control Discharge

Space

Airflow Direction Correct

Incorrect

**

If measured amps exceed the FLA rating on the nameplate, fan RPM must be reduced to decrease the measured amps below the nameplate FLA rating.

Factory Service Department | Phone: 1-866-784-6900 | Fax: 1-919-516-8710

84

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