ICP MF200024C Air Handler installation Guide

SAFETY CONSIDERATIONS

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

Follow all safety codes. Wear safety glasses, protective clothing, and work gloves. Use quenching cloth for brazing operations.

Have fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit. Consult local building codes, the current editions of the National Electrical Code (NEC) NFPA-

70.

In Canada refer to the current editions of the Canadian Electrical

Code CSA C22.1 Recognize safety information.

This is the safety-alert symbol A\. When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury. Understand these signal words; DANGER,

WARNING, and CAUTION. These words are used with the safety-alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death.

WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability or operation.

TABLE OF CONTENTS

TTS

General Information/Installation .........ccccccccccsseeeseeeseeeseees 2

INStAN ATION... ccccceceseseeeeeeceesneeeeeseeeeeeesseeeeeeeesessseeneeeeeseneess 2

Vertical/Horizontal Installation oo... cee cecceseeeeesseeeesseees 3

Ductwork Connection .....c.ccccccccccccceceeessessesseeeeeeseessesseaeeeesesess 4

Filter Installation..........cccccccecsesssseceeeeesceesseseeeeeeseessseneeeeseseess 4 ELECTRICAL SHOCK HAZARD

Electrical CONNECTION... ccccccccesceceeseeesceseeeeeeeeeessestaeeeeeesess 4

Failure to turn off electric power could result in

Blower Performance ......ccccccccccscssssceceeecsessesreaeeeeeesesesseeeeesesess 8 personal injury or death.

Wiring Diagram .........ccccccccceeceeeeceeeeeeeeeeeeecnaeeeeeeeseeennareeeeenees 11

Replacement Parts ......c.ccccccccccccccssseeececsesesesseeeeeecsesesseeeseeess 12

Before installing or servicing system, turn off main power to the system. There may be more than one disconnect switch, including accessory heater(s).

Sequence Of Operation ........ccccccccccccesecceceseeeeeeeeeeeeeessnreeensnees 10

April 2012 Specifications subject to change without notice.

X40159 Rev.C

HAZARD

Figure 1 Nominal Installation Dimensions and Clearances - in(mm) a

3/4" (19)

12-7/16” (316)- MFO8

15-3/4” (400)~ MF12

19-1/4” (489)- MF16

22-3/4” (578)~ ME20

NO HEATERS

All Sides...0

From Supply Duct...0"

CLEARANCES

Recommended Service From Front...20"(508 mm)

Low Voltage |

Entrance

14-3/16” (360)- MFO8

17-112" (445)~ MF12

24” (533)~ MF16

24-1/2” (622)- MF20

~ el

P $

Line Voltage a

.

~

Oo

Entrance A |

, NA

IL a se a a a

24” (610)~ MFO8 & MF12

25” (635)~ MF16 & MF20

20%”

(821)

(Service for blower, filter if installed)

WITH HEATERS

All Sides...0"

From First Three Feet of Supply Duct to Combustibles...1" (25mm)

From Duct after Three Feet...0"

Recommended Service From Front...20" (508mm)

(Service for blower, heaters if installed)

Fire Hazard

Failure to follow this warning could result in personal injury, death, and/or property damage.

When heaters are installed maintain clearances from combustible materials as specified on unit rating plate. Do not use plastic lined or combustible flexible ducting within 36" (914 mm) of the supply end of the modular unit.

GENERAL INFORMATION

make sure adequate clearance is maintained from supply ductwork;

See Clearances and Warning in Figure 1.

e

If the unit is located in an area of high humidity, nuisance sweating of casing may occur. On these installations a wrap of 2” (51mm) fiberglass insulation with a vapor barrier should be used.

HEATER PACKAGES

DEATH, PERSONAL INJURY, AND/OR PROPERTY DAMAGE

Factory approved, field installed, UL listed heater packages are available from the equipment supplier. See unit rating plate for a list of factory approved heaters (electric heat accessory models EHIA only). Heaters that are not factory approved could cause damage which would not be covered under the equipment warranty.

Failure to carefully read and follow this warning could result in equipment malfunction, property damage, personal injury and/or death.

The information contained in this manual is intended for use by a qualified service technician familiar with safety procedures and equipped with the proper tools and test instruments.

Installation must conform with local building codes and with the National Electrical Code NFPA70 current edition.

IN CAUTION

CUT HAZARD

Failure to follow this caution may result in personal injury.

Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing and gloves when handling parts.

INTRODUCTION

The MF modular blower cabinet uses a 208/230V PSC blower motor, with an electronic fan control board. The MF may be used for cooling or heat pump applications either with or without electric healt.

Installations without electric heat require a NO HEAT KIT

(EHIAOOKN10). The cabinet can be installed in an upflow, downflow or horizontal position. Refer to Figure 3 and 4.

INSTALLATION

The unit is ready to install in any position without modifications.

Refer to the coil instructions for information on drain pan configurations etc. Make sure coil is set up properly for desired position of blower cabinet.

Coil must be secured to blower cabinet with the three tabs that are part of the blower cabinet base. Bend the tabs out from the bottom so they fit over the coil cabinet.

Position coil cabinet in relation to the blower so they will be correct for desired application.

LOCATION

Select the best position which suits the installation site conditions.

The location should provide adequate structural support, space in the front of the unit for service access, clearance for return air and supply duct connections, space for refrigerant piping connections and condensate drain line connections. If heaters are being installed,

2 Specifications subject to change without notice.

X40159 Rev.C

For upflow and horizontal applications apply foam seal strip around top of coil cabinet. For downflow application apply foam seal strip around bottom of coil cabinet. Set blower on top of coil cabinet so they are flush. Secure cabinets together using the three tabs on the bottom of the cabinet. Bend the tab out from the bottom so it fits over the coil cabinet. If no pilot holes are present, drill a hole as required for a screw.

Figure 2 Attach Coil to Blower Cabinet

Panels removed for clarity only

Place seal on top of

Bend Tabs (both sides and back) on Bottom of

Blower Cabinet to Fit

over Coil Cabinet

a a“ around perimeter

Coil Cabinet

DOWNFLOW INSTALLATIONS

Refer to instructions with Subbase Kit.

NON-DUCTED RETURN AIR CLOSET

INSTALLATION

The cabinet can be installed in a closet with a false bottom to form a return air plenum, or mounted on an open platform inside the closet.

Platform should be high enough to provide a free (open) area for adequate return airflow into the bottom of the cabinet. The open area can be on the front side or a combination of front and sides, providing there is clearance on the sides between cabinet and closet. Refer to ACCA Manual D for sizing and free area recommendations.

NOTE: Local codes may limit application of systems without a ducted return to single story dwellings.

HORIZONTAL LEFT AND RIGHT

INSTALLATIONS

The modular blower cabinets can be installed in either downflow, horizontal left or horizontal right applications. When a coil cabinet is applied, refer to the coil installation manual for proper drain pan and airflow requirements. They must have the drain pan repositioned for right hand airflow. Refer to coil installation manual.

IN CAUTION

Figure 3 Airflow Positions

UPFLOW

POSITION

DOWNFLOW

HEATER

POSTION

BLOWER com

IS

©

Subbase

Accessory

BLOWER

| l —

PROPERTY DAMAGE HAZARD

Failure to follow this caution may resuit in property damage.

A field fabricated auxiliary drain pan, with a separate drain is

REQUIRED for all installations over a finished living space or in any area that may be damaged by overflow from a restricted main drain pan. In some localities, local codes require an auxiliary drain pan for ANY horizontal installation.

Figure 4 Airflow Positions

AL RIGHT ®OS

Orn a oN © « iO ir

a

OD? wa

CO

2 it

[aiow>

Le

Ve

« o a“ ee

_-e

KO}

y

ie

S

8

CO _|O

SUSPENDED CABINET INSTALLATION

1. The cabinet may be supported on a frame or shelf, or it may be suspended.

X40159 Rev.C

Specifications subject to change without notice. 3

JAW

2. Use metal strapping or threaded rod with angle iron supports under the auxiliary drain pan to suspend cabinet. These supports

MUST run parallel with the length of the cabinet. Refer to Figure

5.

3. Ensure that there is adequate room to remove service and access panels after installing supporting brackets.

4. Place field installed vibration isolators in auxiliary drain pan to support cabinet.

DUCT CONNECTIONS

ELECTRICAL SHOCK or UNIT DAMAGE HAZARD


If a disconnect switch is to be mounted on unit, select a location where drill and fasteners will not contact electrical refrigeration components.

Figure 6 | Fan Control Board

Supply Duct

Supply duct must be attached to the outside of flange on outlet end of unit. Flexible connectors may be used if desired. Maintain clearances from supply duct to combustibles when heaters are installed. Refer to Figure 1 and unit rating plate.

Return Duct

Return duct should be attached to bottom of unit using sheet metal screws or other fasteners.

FILTER INSTALLATION

Filters must be field supplied. A remote filter grille or other means must be provided. Refer to ACCA Manual D for remote filter sizing.

Figure 5 Horizontal installation

See Note

The power supply wiring to the unit MUST be provided with overcurrent protection. Governing codes may require this to be fuses

ONLY or circuit breakers. Refrigerant

Lines

Field-Fabricated

Vibration

Drain Pan

Isolators

Supports MUST run parallel with blower cabinet

Drain

Lines

98-29-O8o

NOTE: if increased structural strength is needed in the horizontal position, use field supplied two connecting plates in place of the tabs on the bottom of the blower.

OVERCURRENT PROTECTION

For blower cabinets without heaters, a 15 amp circuit may be used.

Before proceeding with electrical connections, make certain that supply voltage, frequency, phase, and circuit ampacity are as specified on the unit rating plate. See unit wiring label for proper field high and low voltage wiring. Make all electrical connections in accordance with the NEC and any local codes or ordinances that may apply. Use copper wire only. The unit must have a separate branch electric circuit with a field-supplied disconnect switch located within sight from and readily accessible from the unit.

ELECTRICAL CONNECTIONS

The MF modular blower utilizes an electronic fan control board which

NOTE: When a pull-out type disconnect is removed from the unit, has a low voltage circuit protective fuse (5 AMP), and pigtail only the Load side of the circuit is de-energized. The Line side connections for thermostat hook up. The fan control also has a relay for blower operation, and built in 90 second blower-off time delay relay (TDR). To disable the TDR feature, snip the jumper wire JW1.

Refer to Figure 6.

All electrical work MUST conform with the requirements of local codes and ordinances and the National Electrical Code NFPA 70 current edition.

The low voltage transformer and the fan control are standard on all models and are prewired at the factory. Line voltage connections are made to the heater accessory or the lugs on the No Heat Kit. remains live until the main (remote) disconnect is turned off.


X40159 Rev.C

ELECTRICAL SHOCK or UNIT DAMAGE HAZARD


Turn OFF electric power at fuse box or service panel before making any electrical connections and ensure a proper ground connection is made before connecting line voitage.

ELECTRICAL SHOCK HAZARD

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

Turn OFF the main (remote) disconnect device before working on incoming (field) wiring. Incoming (field) wiring on the line side of the disconnect found in the modular blower unit remains live, even when the pull-out is removed. Service and maintenance to incoming (field) wiring cannot be performed until the main disconnect switch (remote to the unit) is turned off.

MF units installed without electric heat require the use of a factory- authorized No Heat Kit (accessory part number EHIAQOKN10). This kit provides the electrical connections necessary to supply the unit with 208/230V power when electric heat is not present.

For units without electric heat:

1. Locate adapter and filler plates with screws inside package. If necessary, adjust plates to allow for installation of No Heat Kit required inside cabinet. Refer to Figure 7.

2. Secure No Heat Kit accessory with four (4) screws.

3. Connect the 9-pin plug from No Heat Kit wiring into the receptacle that attaches to fan control board.

4. Connect ground wire to unit ground lug.

5. Connect 208/230V power lead from field disconnect to No Heat

Kit.

For units with electric heat, see Electric Heater Installation

Instructions and blower airflow requirements.

NOTE: Transformer is factory-wired for 230V operation. For 208V applications the transformer must be rewired to the 208V tap. Refer to unit wiring label.

GROUNDING CONNECTION

Use a copper conductor(s) from the ground lug on the No Heat Kit or ground lugs on the electric heater to a grounded connection in the electric service panel or a properly installed grounding rod.

Low Voltage Control Connections

Wire low-voltage in accordance with wiring label on the blower (also refer to Figures 8 - 12. Use 18 AWG color-coded, insulated (35°C minimum) wire to make the low-voltage connections between: thermostat, indoor equipment, and outdoor equipment. If thermostat is located more than 100 feet (31m) from the unit (as measured along the low voltage wire), use 16 AWG color-coded, insulated

(35T minimum) wire. All wiring must be NEC Class 1 and must be separated from incoming power leads. Refer to outdoor unit wiring instructions for additional wiring recommendations.

Field supplied low-voltage wiring should be field connected inside control splice box area (secure with wire nuts), and strain relief bushing or rubber grommet to seal cabinet opening.

Figure 7 Electrical Controls

Low Voltage

Connections

~ ~

Filler Plate

Adapter Plate

No Heat Kit ~

Ground

Connection

Control Splice Box

X40159 Rev.C


Table 1 Supply Circuit Supply | H.P. Max. MCA Max Recommended

Circuit

Volts | Phase | Hertz | No.

Motor | Branch

Amps _ | Circuit

AMP

Over- current Supply Wire Ground Wire

Protectio 75C copper n Devise! » of | min | Max. Ft.(m)| #of | Min

(Amps) Wires | Size Length Wires | Size

MF08* 208 1 60 Single 1/3 2.5 3.1 15 2 14 105 (32) 1 14

THERMOSTAT

230

MF12*

MF16*

MF20*

208

230

208

230

208

230

1

1

1

60

60

60

Single

Single

Single

1/2

1/2

3/4

2.9

2.9

6.0

3.6

3.6

7.5

15

15

15

2

2

2

14

14

14

105 (32)

105 (32)

90 (27) 1

1

1

14

14

14

Figure.8

(Cooling Only)

THERMOSTAT

Wiring Layout Air Conditioning Unit Figure 10 Wiring Layout Heat Pump Unit (Cooling

and Single-Stage Heat with No Outdoor

Thermostat)

[R| DA Rep

[¢] EA GRY

BRN

R

G

AIR COND. fA.

LA

THERMOSTAT HEAT PUMP

(CONTROL)

R

Figure 9

R

G

Ww

Wiring Layout Air Conditioning Unit

(Cooling and Single-Stage Heat)

AIR COND.

Specifications subject to change without notice.

X40159 Rev.C

THERMOSTAT

Figure 11 Wiring Layout Heat Pump Unit (Cooling and

Two-Stage Heat with One Outdoor

Thermostat)

HEAT PUMP

(CONTROL)

R

When two-stage electric heat is desired (refer to Table 2 - Heat

Strip Staging), separate out the pink W3 wire from W2 & E connections. Refer to Table 2-2 and wiring diagram Figure 11. W3 can be separated and controlled by the indoor wail thermostat (if multi-stage capable), or by an outdoor thermostat (ODTS). Refer to

ODTS kit instruction for proper wiring.

When three-stage electric heat is desired, cut the W2 wire nut off and discard. Strip W2, W3, and E. Refer to Table 2-3, and wiring diagram Figures 12. Connect according to the thermostat kit instructions or ODTS kit instructions for proper wiring.

THERMOSTAT

Figure 12 Wiring Layout Heat Pump Unit (Cooling and

Two-Stage Heat with Two Outdoor

Thermostats)

HEAT PUMP

(CONTROL)

R

CHANGING MOTOR SPEED

To change the blower speed, disconnect the black wire at the blower motor terminal block and reconnect at the desired blower speed tap (refer to Table 4).

HEATER STAGING

The modular controls are factory circuited for single-stage electric heat operation. Refer to Table 2 for available heaters and Table 3 for unit airflow based without a coil, filter, or electric heat applied.

Table 2 Heat Strip Staging

2-1 2-2 2-3

Single-Stage Two-Stage Three-Stage

Capable Operation

(no staging - all

electric heat

Capable

(with ODTS

only) together)

Single- EHIAO5KB / KN EHIA15KB EHIA25KB10

Phase EHIA07KB / KN EHIA20KB

Three-

Phase

EHIA10KB / KN

EHIA15KB

EHIA20KB

EHIA25KB

EHIA10HB

EHIA15HB

EHIA25KB

EHIA10HB

EHIA15HB

EHIA20HB

EHIA25HB

KB is single-phase with circuit breaker

EHIA20HB

EHIA25HB

EHIA20HB

EHIA25HB

KN is single-phase with terminal block (no-breaker)

HB is three-phase with circuit breaker

Table 3 Minimum Motor Speed Tap Selection For

Electric Heater

Electric Heater SIZE kW

Model | 5 kW | 7.5 kW | 10 kW | 15 kW | 20 kW | 25 kW

LOW = low speed tap selection

MED = medium speed tap selection

HIGH - high speed tap selection

AIR FLOW CHECK

For proper system operation, the air flow through the indoor coil should be between 350 and 450 cfm per ton of cooling capacity.

The air flow through the unit can be determined by measuring the external static pressure to the unit and selecting the motor speed tap that will most closely provide the required air flow.

Set up to measure external static pressure at the supply and return duct connections. Refer to Figure 13.

2. Drill holes in the ducts for pressure taps, pilot tubes, or other accurate pressure sensing devices.

3. Connect these taps to a level inclined manometer or draft gauge.

4. Ensure the coil and filter are clean, and all the registers are open.

5. Determine the external operating. static pressure with the blower

X40159 Rev.C


TEMPERATURE RISE CHECK

6. Refer to the Air Flow Data, Table 4, to find the speed setting that will most closely provide the required air flow for the system.

7. Refer to Motor Speeds and Airflow in these instructions if the speed is to be changed.

8. Recheck the external static pressure with the new setting, and confirm speed switch selection.

Figure 13 Static Pressure Check

Supply

Indoor

Section

=

Incline

Manometer

Return (

Temperature rise is the difference between the supply and return air temperatures.

NOTE: The temperature rise can be adjusted by changing the heating speed tap at the unit’s blower terminal block. Refer to the unit’s Installation Instructions for airflow information.

A temperature rise greater than 60°F (33.3°C) is not recommended.

1. To check the temperature rise through the unit, place thermometers in the supply and return air ducts as close to the unit as possible,avoiding direct radiant heat from the heater elements.

Open ALL registers and duct dampers.

Set thermostat Heat-Cool selector to HEAT.

Set the thermostat temperature setting as high as it will go.

Turn electric power ON.

Operate unit AT LEAST 5 minutes, then check temperature rise.

NOTE: The maximum outlet air temperature for all models is 2007

(93.3).

7. Set thermostat to normal temperature setting.

8. Be sure to seal all holes in ducts if any were created during this process.

Airflow Based on no coil, no filter, no electric heat. Deduct heater static shown in heater static table.

Deduct coil static, See Coil Specification Sheet. Deduct .20 in we (50 Pa) for Downflow Subbase Kit.

Table 4 Airflow is blower only, no coil attached

MF08 In we

SPEED

Low

Med

High

VOLTS

230v

208v

230v

208v

230v

208v

0.20

1029

872

1286

1113

1500

1317

0.30

1020

860

1270

1105

1470

1305

0.40

1007

845

1254

1091

1432

1286

0.50

985

825

1220

1070

1380

1255

0.60

960

797

1180

1042

1315

1220

0.70

915

765

1125

1000

1250

1170

0.80

862

721

1058

947

1168

1008

MF012 In we

SPEED

Low

Med

VOLTS

230V

208

230V

High

208v

230V

208v

0.20

973

811

1284

1084

1663

1383

0.30

975

815

1295

1084

1670

1385

0.40

979

816

1301

1084

1671

1390

0.50

979

810

1305

1090

1655

1390

0.60

973

797

1302

1089

1631

1383

0.70

955

780

1280

1065

1585

1365

0.80

931

749

1246

1030

1519

1328

MF16 In we

SPEED

Low

Med

High

VOLTS

230V

208

230V

208

230V

208

0.20

1020

858

1379

1156

1776

1496

0.30

1015

845

1385

1154

1782

1496

0.40

1009

830

1386

1149

1783

1496

0.50

1002

815

1379

1144

1765

1495

0.60

991

801

1364

1134

1736

1495

0.70

975

780

1343

1120

1698

1470

0.80

950

749

1309

1098

1643

1433

MF20 In we

SPEED

Low

VOLTS

230V

0.20

1492

0.30

1495

0.40

1492

0.50

1475

0.60

1451

0.70

1395

0.80

1308

208v

Med

High

230V

208

230V

208

1246

1969

1641

2696

2417

1245

1955

1640

2600

2355

1238

1935

1633

2492

2287

1225

1890

1615

2350

2200

1203

1818

1584

2192

2092

1175

1700

1510

2020

1940

1125

1570

1406

1844

1774

* THE MAXIMUM EXTERNAL STATIC PRESSURE IS 0.8” W.C., WITHOUT COOLING COIL. DEDUCT STATIC PRESSURE OF COIL

FOR MAXIMUM STATIC PRESSURE.


X40159 Rev.C

Table 5 - ELECTRIC HEATHER STATIC PRESSURE DROP

Single-Phase Three-Phase

EHIA EHIA EHIA EHIA EHIA EHIA EHIA EHIA | EHIA EHIA

CFM 05 07 10 15 20 25 N/A NIA 10 15 20 25

In we In we

600 0.01 0.01 0.04 - - - 0.01

700 0.01 0.01 0.04 - - - 0.01

800 0.01 0.01 0.04 0.01 - - 0.01

900 0.01 0.01 0.04 0.01 - - 0.01

1000 0.01 0.01 0.04 0.01 0.02 - 0.01

1100 0.01 0.01 0.04 0.02 0.02 -

1200 0.01 0.01 0.014 0.02 0.02 -

1300 0.01 0.02 0.02 0.02 0.02 -

1400 0.01 0.02 0.02 0.02 0.03 0.03

1500 0.01 0.02 0.02 0.02 0.03 0.04

1600 0.01 0.02 0.02 0.03 0.03 0.04

1700 0.01 0.02 0.02 0.03 0.03 0.04

1800 0.01 0.02 0.02 0.03 0.04 0.04

1900 0.01 0.02 0.02 0.03 0.04 0.05

2000 0.01 0.02 0.02 0.03 0.04 0.05

0.01

0.01

0.02

0.02

0.02

0.02

0.02

0.02

0.02

0.02

ACCESSORIES

ELECTRIC AIR CLEANER

The Electronic Air Cleaner may be connected to MF as shown in

Figure 14. This method requires a field supplied transformer. See

Electronic Air Cleaner literature for kit requirements.

Wiring Layout of Electronic Air

Figure 14

Cleaner to Modular Blower

Figure 15 Wiring Layout of Humidifier to Modu-

g lar Blower with Electric Heat

CONTROL BOARD

Rages THERMOSTAT

MODULAR BLOWER

CONTROL) FAN RELAY

[RI cA RED R

WIRE

NUT zo vac NO NG

COM as

SPT NONC

| |

[5] EA GRY |g

fe RR

208/230V

]

1 CONVERSION KIT

To TRANSFORMER | cones

COM _

HUMIDIFIER

Connect humidifier and humidistat to modular blower unit as shown in Figures 15 and 16.

| VIO}

VEY

|

|

| @ BRN

;

AIR COND.

L_le

X40159 Rev.C


Sees

Figure 16

Wiring Layout of Humidifier to Heat

Pump

;

(CONTROL)

Aime | ole

HEAT PUMP

EA GRY] g oor BRN c eer

| RELAY |

115

{a th oe

me

| p

0 | HUMIDISTAT

be

L__,

blower motor. Y energizes the outdoor 24V low-voltage circuit in heat pump to energize compressor. O energizes reversing valve in cooling mode and typically remains energized until the mode is changed to heating. When thermostat cooling call is satisfied. Y drops out. O remains energized, and there is a 90 second TDR before indoor fan relay opens.

Heating Mode:

Thermostat energizes R to G and Y only (no O signal in heating). G energizes indoor fan relay on fan control board which completes high-voltage circuit to indoor blower motor. Y energizes the outdoor

24V low-voltage circuit in heat pump to energize compressor. The reversing valve is not energized in heating unless a defrost cycle should occur. When call is satisfied, Y drops out and there is a 90 second TDR before indoor fan relay opens.

D. HEAT PUMP HEATING WITH AUXILIARY

ELECTRIC HEAT

Cooling Mode:

Same operation as above in Heat Pump Cooling Mode.

Heating Mode:

Same operation as above in Heat Pump Heating Mode with the addition of W. Thermostat energizes R to G, Y, and W. W energizes electric heat relay(s) which completes circuit to heater element(s).

When W is de-energized, electric heat relay(s) open, turning off heater elements. The White wire in pigtail connects W2, W3, and E together. This may be separated for heater staging when available, see electric heat kit for more information.

E. ELECTRIC HEAT OR EMERGENCY HEAT MODE

SEQUENCE OF OPERATION

A. CONTINUOUS FAN

Thermostat closes R to W. W energizes electric heat relay(s) which completes circuit to heater elements(s). Blower motor is energized through N.C. (normally closed) contacts on fan relay. When W is de-energized, electric heat relay(s) opens.

CARE AND MAINTENANCE

Thermostat closes R to G. G energizes fan relay on FAN

CONTROL BOARD which completes the high voltage circuit to indoor blower motor. When G is de-energized, there is a built in 90 second blower-off time delay relay (TDR). To disable the TDR feature, snip the jumper wire JW1.

B. COOLING MODE

Air Conditioner Only:

The system should be regularly inspected by a qualified service technician. Consult the servicing dealer for recommended frequency. Between visits, the only consumer service recommended or required is air filter maintenance and condensate drain operation.

AIR FILTER

Thermostat energizes R to G and Y. G energizes fan relay on fan control board which completes high-voltage circuit to indoor blower motor. Y energizes the 24 low-voltage contactor in condensing unit.

When call is satisfied, Y drops out and there is a 90 second blower

TDR before fan relay opens.

Heat Pump:

Inspect air filters at least monthly and replace or clean as required.

Disposable type filters should be replaced. Reusable type filters may be cleaned by soaking in mild detergent and rinsing with cold water. The frequency of cleaning depends upon the hours of operation and the local atmospheric conditions. install filters with the arrows on the side pointing in the direction of air flow. Clean filters keep unit efficiency high.

LUBRICATION

Same as above - except thermostat will also energize O for reversing valve operation in cooling mode. O will typically remain energized by the thermostat (after cooling cail is satisfied), or until The bearings of the blower motor are permanently lubricated. the mode is changed to heating.

CONDENSATE DRAINS

C. HEAT PUMP

Cooling Mode:

During the cooling season check the condensate drain lines to be sure that condensate is flowing from the primary drain but not from the secondary drain. If condensate ever flows from the secondary

Thermostat energizes R to G, Y and O. G energizes indoor an relay on fan control board which completes high-voltage circuit to indoor drain, the unit should be promptly shut off and the condensate pan and drains cleaned to insure a free flowing primary drain.

10 Specifications subject to change without notice. X40159 Rev.C

WIRING DIAGRAM

( COOUNGCONTROLONLY —}

FIELD POWER MAING GISCOMWECT PER NED CMC ( ang WD

SVS CN TRA SPORMET: O00 Wa

Fane he = Su

Ee se ey

I a

“

ol te |

i

cL} ° kh

war WS

& beret p See nc i i

| Ree

NOTES

+, Use Copper Wire 75°C Min) Only Babee Decinnect Switch And Unt

a. WAnge OO The Gregival Wire, Aa &

2, Te Be Wired In Qocomanos Wier WEG And Locel Codes,

4, Pages wow ollage Fue Yih the Gomme Thea 3 dong Fee,

§, Connect @ To #6 lo & Et. See Gutdowr Instruction For Qetele.

.

&, (2) Spend Weter Shan: Come lees VEL, BUN Uaed To Select HED aed ON, n st i

ad, Muat Be Meplace:, Jae The fare Or Equivalent Tyne Wire,

nH tit

SEE WOTE #4

LOW

wen oF Aa

LEGEND

CAP

COM

F

FAN MOC

Fe

FW

ALMAINING VAAN INLABLIS SHOWA

CA

Poe

RECP

THAR

MOAB PRCT EDS

conc ih

FUSE mc Ale MELAY

:

PLUG

TO

TAP I LOCATIIN

NS ORME

PIELO PACRW ES WII hARAED TCRWEVAL

Minimum Motor © a Mea r Electric Heater

Elesirig Tienier Skee Kw

Aibkw Skew

MIG Tu

MPD RAL

$33098-107 REVLA

X40159 Rev.C


11

aa

REPLACEMENT PARTS

ITEM | CURRENT

NO. PART#

B60077-13 1 DOOR ASS'Y

B60077-14

B60077-15

B60077-16

B60093

Be0004

B60095

Be0096

B60101

BG60102

B60103

B60104

B60098

Be0099

BG60100

B60076-01

B60076-02

B60076-03

BG60076-04

BG60089-02

B60090-02

B60087-02

B60088-01

BG60088-02

B60089-01

B60090-01

TE HEATER ADAPTER

TE HEATER FILLER

CHANNEL

BLOWER RAIL RIGHT/LEFT

BLOWER DECK

BLOWER DECK

BLOWER DECK

TOP ASS'Y

SIDE WRAPPER

WRAPPER

SIDE WRAPPER

International Comfort Products, LLC

Lewisburg, TN 37091 USA

12


X40159 Rev.C

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