Smart Heat

Heat Pump

Heater Packages

Installation Instructions

KFCEH

NOTE: Read the entire instruction manual before starting the installation.

This symbol

→ indicates a change since last issue.

SAFETY CONSIDERATIONS

Installing and servicing of heating and air conditioning equipment can be hazardous due to system pressures and electrical components. Only trained personnel should install or service heating and air conditioning equipment.

Untrained personnel can perform basic maintenance functions such as cleaning coils, or cleaning and replacing filters. All other operations should be performed by trained personnel. When working on heating and air conditioning equipment, observe precautions in literature, on tags, and on labels attached to the unit.

Follow all safety codes. Wear safety glasses and work gloves. Have a fire extinguisher available.

Recognize safety information. This is the safety-alert symbol .

When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury.

Understand the signal words DANGER, WARNING, 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 would 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.

INTRODUCTION

This instruction covers installation of Smart Heat electric heater packages Part No. KFCEH0101H10, KFCEH0201H15, and KFCEH0301H20 into

FA4, FB4, FC4, and FX4 fan coils. Check unit rating plates for compatibility of fan coil and electric heater combinations. See Table 1 for heater package usage.

NOTE: The Smart Heat option is for use only on heat pumps, and is not approved for any other application.

Table 1—Accessory Heater Usage

ELECTRIC HEATER

PART NO.

KFCEH0101H10

KFCEH0201H15

KFCEH0301H20

DESCRIPTION

10 kw, Non-Fused

15 kw, Fused

20 kw, Fused

MODELS FA4, FB4, FC4, FX4

SIZE

018-036

024-048

030-070

DESCRIPTION AND USAGE

The Smart Heat electric heater package options allow the addition of accessory heaters and related controls to models FA4, FB4, FC4, and FX4 fan coils with heat pump outdoor units only. See Table 1 for heater package usage.

The Smart Heat electric heater package options enhance performance of heat pump by managing the electric heat. Heating elements are staged on individually as required to maintain dwelling set point temperature. The controller will adjust the indoor blower speed tap to reduce airflow in the ultra comfort mode.

The controller is not a substitute for good installation and ductwork practices. All ductwork should be free of air leakage and insulated.

Performance may not be satisfactory if good practices are not followed.

NOTE: Electric heaters require a minimum airflow. See Table 2 for minimum motor speed selection before installing. There is a 1-in. minimum clearance to combustible materials for the first 36 in. of ductwork on all fan coils with 20-kw packages, and 024, 033, and 038 size fan coils with

15-kw heater packages.

WARNING: Before beginning any installation or modification, be sure the main electrical disconnect switch(es) is in the OFF position. Tag the disconnect with a suitable warning label. Electrical shock can cause personal injury or death.

INSTALLATION

PROCEDURE 1—INSTALL ELECTRIC HEATER ASSEMBLY

NOTE: Ensure heater coils are not deformed or damaged during heater installation.

1. Make sure power is off.

2. Remove blower access panel of fan coil unit.

Form: AG-FCEH-07 Cancels: AG-FCEH-03 Printed in U.S.A.

5-00 Catalog No.

63FC-EH5

INSERT FUSE

BOX TAB HERE

SINGLE-CIRCUIT

GROUND LUG

COVER PLATE

OR

KNOCKOUT

FUSE BOX TAB

DIMPLE

FUSE BOX

DUAL-CIRCUIT

GROUND LUG

SLOTS

HEATER/CUTOUT

COVER

FUSE COVER

WIRE TIE

(REMOVE ON

LARGE FAN COILS)

A94126

Fig. 1—Installation of Heater Package and Printed-Circuit Board

3. Disconnect power leads, pigtail leads (black and yellow), fan leads (yellow, red, blue, and black), primary and secondary transformer leads, and all low-voltage control wires. Remove existing printed-circuit board (PCB). Remove existing heater package or cooling control plate from fan coil. (See Fig. 1.)

4. Insert heater assembly into front of fan coil until element rods engage holes in heat shield.

5. Attach heater control plate to fan coil using 2 screws. (See Fig. 1.)

Table 2—Minimum Motor Low-Speed Tap Selection

FA4, FB4, FC4

018

024

030

033

036

038

042

048

060

070

FAN COIL

FX4

—

—

030

—

036

—

042

048

060

—

10

Med*

Low

Low

Low

Low

—

—

—

—

—

HEATER KW

15

—

Med†

Low

Med†

Low

Low†

Low

Low

—

—

20

—

—

Med†

Low†

Low†

Low†

Low†

Low†

Low†

Low†

* High speed with 208v.

† Requires a minimum 1-in. clearance to combustible materials for the first 36 in. of ductwork. On 2-speed fan models, low speed may be used in place of medium (Med) speed.

PROCEDURE 2—ATTACH FUSE BOX

For 15- and 20-kw fused heater:

1. After installing heater assembly, attach fuse assembly to side of fan coil unit by inserting fuse box tab between insulation and left side of unit and fan deck, if necessary.

2. Mount front of assembly to side flange with 2 screws provided. On fan coil units size 042 and larger, remove wire tie that shortens wire length between heater and fuses.

3. Close cover by engaging dimples in fuse box. (See Fig. 1.)

PROCEDURE 3—PRINTED-CIRCUIT BOARD (PCB) AND BRACKET INSTALLATION

CAUTION: Avoid direct contact with the PCB. The PCB is a static sensitive device. Handle by the sheet metal bracket only. Static discharge can damage the PCB.

—2—

SEC2

SEC1

CEPL130121-01

MOV1

R1

R30

C3

1

1

JW6

R23

C6

C5 C2

R19

R10

C9

C8

R18

R11

C7

R8

C13

R21

R9

JW7

R20

C12

C10

R13

R15

D5

R3

Z5

R16

R2

R5

R40

R41

R4

FS1

Z3

Z2

JW8

R7

R6

Z4

R12

C11

R17

ST1

R

C

Y

G

O

W2D

W 2T

JW1

W 3

Y o

AUX–

AUX+

R27

K2

LOW VOLTAGE

TERMINAL

BOARD

JW1

(CUT WHEN

OUTDOOR

THERMOSTAT

IS USED)

JW2

(HIGH FAN

ONLY WHEN

CUT)

3 2

XFORM

T1

DUMMY

T2

240 VAC

T3

9

6

F1

FAN

DUMMY

COMMON

240

VAC

F2

8

5

7

4

1

HI

LO

K3

RECEPTACLE

A94127

Fig. 2—Printed-Circuit Board (PCB)

1. Install control board assembly into slots on blower deck. (See Fig. 1.)

2. Insert screw through mounting bracket into lip of fan coil and tighten.

PROCEDURE 4—ELECTRICAL CONNECTIONS

Refer to unit instructions for recommended wiring procedures. Install wiring in accordance with all applicable local and national codes. See Table

3 for recommended wire and fuse sizes. Harness contains both 24-v control, and high-voltage wiring.

1. Connect heater harness plug to receptacle on PCB. (See Fig. 2.) A secure connection MUST be made between plug and receptacle. Plug will interlock with receptacle when properly seated.

2. Connect yellow common fan lead to PCB fan terminal F1.

3. Connect desired cooling speed to PCB terminal HI.

4. Connect lower speed desired for reduced heat pump speed to terminal LO. (See Tables 2, 4, and 5.)

5. Connect unused fan speed tap to dummy terminal F2.

6. For 24-v control system connections to unit PCB:

Refer to unit wiring instructions and diagrams for recommended wiring procedures. (See Fig. 3, 4, 5, 6, 7 and 8.) Use 18-gage thermostat wire for low-voltage control field wiring. When over 100 ft, increase wire gage.

NOTE: PCB staging is automatic and controls its own algorithm. However, if local codes require using an outdoor thermostat (see applicable outdoor unit Installation Instructions), cut jumper wire JW1 on PCB. (See Fig. 2.) All heaters are limited to 2 levels of heat with jumper JW1 cut.

(See Table 6 for capacity.)

CAUTION: Miswiring of transformer to printed circuit board will destroy both transformer and printed circuit board.

7. High-voltage supply connections to heater:

Unit wiring label is for 230-v operation. On transformers without primary leads, use the yellow and black pigtails provided with kit. Connect yellow lead between transformer "C" and PCB "T1". Connect black lead between transformer 230 or 208 and PCB "T3". On transformers with primary leads, connect primary transformer black lead to T1, blue lead to T2, and red lead to T3. When using 208v, connect red primary lead to T2 and blue lead to T3.

8. Connect secondary transformer wires to PCB terminals SEC1 and SEC2. (See Fig. 2.)

NOTE: Heater supply circuit wire size and overcurrent protection must comply with National Electric Code (NEC) and Underwriters Laboratories

(UL) "Branch Circuit" requirements. (See Tables 3, 4, and 5.) Wires and overcurrent protection, integral to the heater, are not required to meet branch circuit requirements. Internal circuit protection of 60 amps maximum is acceptable.

—3—

KFCEH0101H10

HEATER AMPS

MCA*

MOP†

75°C WIRE SIZE (AWG)

MAXIMUM WIRE LENGTH

(FT)

Table 3—Electric Heater Package Data

WATTS @ 240V: 9000

230-v

SINGLE CIRCUIT

35.9

48.3

50

8

61

WATTS @ 240v: 15,000

SINGLE CIRCUIT

KFCEH0201H15

HEATER AMPS

MCA

MOP

75°C WIRE SIZE (AWG)

MAXIMUM WIRE LENGTH

(FT)

L1/L2

HEATER AMPS

MCA

MOP

75°C WIRE SIZE (AWG)

MAXIMUM WIRE LENGTH

(FT)

L3/L4

HEATER AMPS

MCA

MOP

75°C WIRE SIZE (AWG)

MAXIMUM WIRE LENGTH

(FT)

16.0

25.4

30

10

74

43.9

54.9

60

6

85

230v

59.9

80.3

90

4

92

DUAL CIRCUIT

WATTS @ 240v: 11,000

WATTS @ 240v: 4000

WATTS @ 240v: 20,000

SINGLE CIRCUIT

KFCEH0301H20

HEATER AMPS

MCA

MOP

75°C WIRE SIZE (AWG)

MAXIMUM WIRE LENGTH

(FT)

L1/L2

HEATER AMPS

MCA

MOP

75°C WIRE SIZE (AWG)

MAXIMUM WIRE LENGTH

(FT)

L3/L4

HEATER AMPS

MCA

MOP

75°C WIRE SIZE (AWG)

MAXIMUM WIRE LENGTH

(FT)

*MCA — Minimum Circuit Ampacity

†MOP — Maximum Overcurrent Protection

40.0

56.8

60

6

82

40.0

50.0

50

8

93

230v

79.9

106.7

110

2

111

DUAL CIRCUIT

WATTS @ 240v: 10,000

WATTS @ 240v: 10,000

208-v

32.5

44.0

45

8

60

208v

54.2

73.2

80

4

92

208v

72.3

97.2

100

3

87

36.2

52.0

60

6

81

36.2

45.3

50

8

93

14.4

23.4

25

10

73

39.7

49.7

50

8

53

—4—

TYPICAL

HEAT PUMP

THERMOSTAT

INDOOR

CONTROL

BOARD

OUTDOOR

SPLICE

SINGLE-SPEED HEAT

PUMP DEFROST BOARD

O

E

W2

Y

G

R

C

L

O

W2D

W2T

Y

G

R

C

W3

Y

0

O

W2

JW1

Y

L

R

C

A94128

Fig. 3—System Wiring Diagram Using A Typical Indoor Thermostat, With No Outdoor Thermostat a. Nonprotected heaters

(1.) The 10-kw heater can be wired for single supply only. Supply circuits connect to heater pigtail leads.

(2.) The 10-kw heaters can use separate field-installed, factory-authorized disconnect kit Part No. KFADK0101DSC which installs in fan coil.

b. Fused heater

(1.) The 15- and 20-kw heaters can be wired for single- or dual-supply circuits.

(2.) Single supply circuit wiring requires a factory-authorized, single point adapter kit Part No. KFASP0101SPK.

MOTOR SPEED TAP

Common

High

Medium

Low

Table 4—Color Code For Motor Lead Wires

WIRE COLOR

Yellow

Black

Blue (3-speed only)

Red (Blue — 2-speed motors)

UNIT

FA4A018-036

FA4A042-070

FB4A, FC4B, FX4A (All Sizes)

9. Ground Connections

Table 5—Fan Motor Speed Taps

MOTOR SPEED

2

3

3

COOL SPEED

High

Medium

Medium

→

WARNING: According to NEC, ANSI/NFPA 70, and local codes, the cabinet must have an uninterrupted or unbroken ground to minimize personal injury if an electrical fault should occur. The ground may consist of electrical wire or metal conduit when installed in accordance with existing electrical codes. (See Ground/Conduit Note below.) Failure to follow this warning could result in electrical shock, fire, or death.

NOTE: Use UL-listed conduit and conduit connector for connecting supply wire(s) to unit to obtain proper grounding. If conduit connection uses reducing washers, a separate ground wire must be used. Grounding may also be accomplished by using grounding lugs provided in control box.

a. For non-protected or single-circuit heaters, 1 equipment ground connection is provided on fan coil units. (See Fig. 1.)

—5—

MODEL HP

THERMOSTAT

24 VAC HOT

24 VAC COMM

R

C

COOL / HEAT

STAGE 1

FAN

Y/Y2

G

RVS COOLING O/W2

HEAT STAGE 2 W/W1

INDOOR

CONTROL

BOARD

R

C

Y

G

O

W2D

W2T

W3

Y

0

OUTDOOR

SPLICE

SINGLE-SPEED HEAT

PUMP DEFROST BOARD

R

C

O

W2

JW1

Y

A97217

Fig. 4—System Wiring Diagram Using A Corporate Model Heat Pump Indoor Thermostat, With No Outdoor Thermostat b. For 15- and 20-kw fused heaters, an additional ground lug is provided on fuse mounting bracket for dual-circuit grounding. (See Fig.

1.)

10. Mode Selection a. In some cases it is desirable for the PCB to operate in efficiency mode. This is accomplished by cutting jumper JW2. (See Fig. 2.) Jumper

JW2 is labeled. Cut jumper for high speed fan only. In this mode, the PCB only energizes the HI speed tap selection. With jumper JW2 cut, fan speed tap terminal LO becomes a dummy terminal.

b. In some instances when fan coil heater calls for a minimum speed selection of MED (blue) and desired cooling speed is MED (blue), fan speed tap MED (blue) should be located on PCB fan terminal labeled HI, and JW2 jumper must be cut. Store unused fan taps on terminals DUMMY and LO.

c. When 018 size fan coil unit is used on 208v, black speed tap must be connected to HI and JW2 must be cut.

11. Accessories

Use accessory kit Part No. KFAIR0101ACR to attach electronic air cleaner (EAC) or humidifier. (See Fig. 9.) Follow accessory kit

Installation Instructions.

PROCEDURE 5—ATTACH WIRING DIAGRAM AND RATING LABEL

1. Attach new wiring label to fan coil blower. Completely cover old wiring label. (See Fig. 12.)

2. Attach new heater rating label over existing electrical information rating label located on front access door of fan coil unit. (See Fig. 10.)

PROCEDURE 6—INSTALLATION VERIFICATION

1. After completion of heater installation, check to ensure proper connections and routings have been made.

2. Ensure all electrical covers are in place, and proper labels have been applied.

3. Reinstall blower access door before turning on unit power.

PROCEDURE 7—SMART HEAT OPERATION

A.

Cooling

Smart Heat option controls the cooling mode in the same manner as conventional heat pumps are controlled. The fan has a 90 sec blower off delay at the end of a cooling cycle.

B.

Heat Pump Heating

Smart Heat option does not control heating in the conventional method. The PCB energizes the compressor 30 sec before the indoor fan is energized. This allows the indoor coil to heat up eliminating cold-blow on start-up.

The electric heat is staged-on to allow continuous operation of heat pump and electric resistance heat below the balance point (below the point where the heat pump cannot maintain dwelling temperature without supplemental heat) independent of outdoor thermostats.

Although the PCB has provisions for an outdoor thermostat, it is not needed for staging. On cycle down, indoor fan remains on 60 sec to recover heat stored in indoor coil.

—6—

TYPICAL

HEAT PUMP

THERMOSTAT

INDOOR

CONTROL

BOARD

R

C

Y

G

O

E

W2

L

W2D

W2T

W3

Y

0

R

C

Y

G

O

OUTDOOR

SPLICE

SINGLE-SPEED

HEAT PUMP

DEFROST BOARD

R

C

CUT

JW1 ODT

Y

L

O

W2

Fig. 5—System Wiring Diagram Using A Typical Indoor Heat Pump Thermostat, With 1 Outdoor Thermostat

A94129

MODEL HP

THERMOSTAT

INDOOR

CONTROL

BOARD

OUTDOOR

SPLICE

SINGLE-SPEED HEAT

PUMP DEFROST BOARD

24 VAC HOT

24 VAC COMM

R

C

COOL / HEAT

STAGE 1

FAN

Y/Y2

G

RVS COOLING O/W2

HEAT STAGE 2 W/W1

R

W2D

W2T

W3

Y

0

G

O

C

Y

CUT

JW1

O

W2

R

C

Y

ODT

A97218

Fig. 6—System Wiring Diagram Using A Corporate Model Heat Pump Indoor Thermostat, With 1 Outdoor Thermostat

C.

Defrost

The Smart Heat PCB stages the correct amount of supplemental heat during defrost. If too much heat is added, the system will stay in defrost for the completion of the defrost cycle even though the thermostat is satisfied. On the next cycle, 1 less element will be energized during the next defrost period.

D.

Diagnostic LED

The PCB of the Smart Heat option heater package contains a microprocessor which controls fan operation, fan speed, outdoor unit, and heater elements. For troubleshooting, a service LED indicates the condition of the PCB. See Table 7 for LED flash codes.

—7—

Y

G

O

R

C

TYPICAL

HEAT PUMP

THERMOSTAT

INDOOR

CONTROL

BOARD

E

W2

L

SHR W2D

W2T

W3

Y

0

Y

G

O

R

C

OUTDOOR

SPLICE

R

C

O

W2

CUT

JW1

SHR ODT

Y

L

SINGLE-SPEED

HEAT PUMP

DEFROST BOARD

Fig. 7—System Wiring Diagram Using A Typical Indoor Heat Pump Thermostat, With Supplemental Heat Relay

A94130

MODEL HP

THERMOSTAT

INDOOR

CONTROL

BOARD

OUTDOOR

SPLICE

SINGLE-SPEED HEAT

PUMP DEFROST BOARD

24 VAC HOT

24 VAC COMM

R

C

COOL / HEAT

STAGE 1

FAN

Y/Y2

G

RVS COOLING O/W2

HEAT STAGE 2 W/W1

SHR

R

C

Y

G

O

W2D

W2T

W3

Y

0

O

W2

R

C

CUT

JW1

SHR ODT

Y

A97219

Fig. 8—System Wiring Diagram Using A Corporate Model Heat Pump Indoor Thermostat, With Supplemental Heat Relay

PROCEDURE 8—OPERATING AND INSTALLING CHARACTERISTICS

A.

PCB Component Layout, Description, and Function

1. Low-voltage terminal board is used to connect indoor thermostat to 24-v secondary side of transformer, and to serve as a junction between indoor thermostat and outdoor unit. (See Fig. 2.) a. R is used to connect secondary side of transformer to thermostat and outdoor unit. R is fused.

b. C is used to connect transformer secondary common for thermostat and outdoor unit.

c. Y is input signal from thermostat signaling heat pump operation.

d. G is input signal from thermostat, signaling continuous fan operation.

e. O is input and junction terminal for reversing valve signal.

f. W2D is input from outdoor unit (heat pump), signaling control board that heat pump is in defrost.

—8—

HEATER PART NO.

KFCEH0101H10

KFCEH0201H15

KFCEH0301H20

Table 6—Electric Heater Stage Limiting

Heater Stage

10 kw Non-Fused

15 kw Fused

20 kw Fused

3

5

1

3

STAGES (KW OPERATING)

W2T Only (JW1 cut)

2

6

3

9

8

10

11

15

W2T and W3

4

9

15

20

FLASH CONDITION

NO LIGHT/FLASH

STEADY LIGHT

STEADY FLASH

1 FLASH

2 FLASHES

3 FLASHES

4 FLASHES

5 FLASHES

6 FLASHES

7 FLASHES

Table 7—LED Flash Code

INPUT SIGNAL

—

—

—

Y only

Y and/or W2T

Y and/or W2T

Y and/or W2T

Y, O

Y, W2D, and/or W2T

W2T

PROBLEM INDICATION

No Power or Board Failure

Board Failure

Stand By Condition or Fan Only

Heat Pump Only Operating

Heat Pump Plus 1 Relay

Heat Pump Plus 2 Relays

Heat Pump Plus 3 Relays

Cool Mode

Defrost Mode

Emergency Heat Mode g. W2T is input from thermostat signaling for supplemental or emergency heat.

h. W3 is input from outdoor thermostat. JW1 connects W3 to W2T as wired at factory. This input is used only if an outdoor thermostat is required by local codes.

i. Y

0 is output from control board to energize outdoor unit (heat pump) contactor.

2. Jumper wires (JW1 and JW2) a. JW1 connects W2T to W3 to limit staging of electric heat with use of an outdoor thermostat. See Table 6 for staging. PCB controls staging to extent that this feature is unnecessary unless required by local codes or regulations.

b. Cutting JW2 sets the PCB in efficiency mode. With JW2 cut, there is no loss of performance due to reduced indoor blower speed when heat pump is operating near balance point. This jumper may be required to be cut if selected cooling fan speed is same as required minimum motor LO speed tap selection as listed in Table 2. With JW2 cut, fan terminal LO becomes a dummy terminal.

3. A fuse is used to protect low-voltage transformer and PCB.

4. AUX+ and AUX- are connections for air conditioning accessories (EAC, humidifier, etc.).

5. F1, F2, HI, and LO are connections for indoor fan.

6. The 9-pin receptacle connects heater package wiring harness.

7. SEC1 and SEC2 are used to connect secondary side of transformer to PCB. SEC1 is connected to equipment ground.

B.

Transformer

The proper wiring of the transformer on the PCB is illustrated in Fig. 11.

NOTE: Terminals T1, T2 (if used), and T3 are wired to primary or high side of transformer. The 208-v terminal (or blue wire if the transformer has primary leads) is used on T3 for 208-v applications. The 230-v terminal (or red wire) is used on T3 for 230-v applications. The T2 is a dummy terminal.

C.

Electric Heat

1. When thermostat calls for electric heat, 24-v signal is sent to PCB through W2T. PCB will energize first stage of electric heat.

2. First 2 stages will come on if W2T and Y are energized at same time. After each 10 minutes W2T is energized, another stage of electric heat will energize.

3. As W2T is de-energized, electric heat will stage down in 8 minute steps with exception of first step. First step will be on only half as long as it was prior to W2T de-energizing.

4. When W2T is energized by itself, JW1 is cut, and an outdoor thermostat is used and is open. Staging is limited as listed in Table 6.

5. When both W3 and W2T are energized without JW1 being cut, or with outdoor thermostat closed, system operation will stage heat up to maximum level if signal is energized for proper amount of time.

6. If only W3 is energized, there is no effect on the PCB. No heat will be energized.

D.

Accessories

Terminals AUX+ and AUX- are energized with 24vdc when fan is energized. The accessory kit Part No. KFAIR0101ACR is used to connect an

EAC or humidifier.

NOTE: Loads cannot be connected directly to AUX+ and AUX-. Use the specified kit only.

—9—

PCB

AUX+ AUX–

230 VAC OR 115 VAC BRANCH CKT FOR EAC

24 VAC LOW VOLTAGE CKT FOR HUMIDIFIER

GND HOT NEUT

24 VDC RELAY

WHT

BLK

TO EAC

OR

HUMIDIFIER

Fig. 9—Wiring Layout of KFAIR0101ACR

A00109

UNIT RATING

LABEL ON DOOR

HEATER LABEL

FROM KIT

Fig. 10—Heater Rating Label Location on Fan Coil Rating Plate

—10—

A90111

DUMMY

TERMINALS

CAP

FAN

MOTOR

INTERNAL FUNCTION

TRANS

9-PIN RECEPTACLE

TO HEATER

PACKAGE

PROCESSOR

24V

K3

K2 K1

JW2

CLIP JUMPER FOR

HIGH SPEED

OPERATION ONLY

LEGEND

INTERNAL CONDUCTORS

EXTERNAL WIRES

Fig. 11—PCB Schematic

JW1

LOW

VOLTAGE

TERMINAL

BOARD

FUSE

A94149

—11—

THIS COMPARTMENT MUST BE CLOSED EXCEPT FOR SERVICING

BLOWER MOTOR

ROTATION

CAUTION:

NOT SUITABLE FOR USE ON SYSTEMS EXCEEDING

150V TO GROUND

ATTENTION:

NE CONVIENT PAS AUX INSTALLATIONS DE PLUS DE 150

V A LA TERRE

COMPONENT ARRANGEMENT

FIELD POWER WIRING

L1 L3

SCHEMATIC DIAGRAM

GND

SEE RATING PLATE

FOR VOLTS & HERTZ

SEE NOTE #1

DISCONNECT PER NEC

L4 L2

HTR1

LS1

HTR3

LS3/4

LS2

HTR2

YEL

F1

COMM

FAN

DUMMY

240

VAC

F2

BLU

RED

BLK BRN

HI

LO

CAP

YEL

LS4

1

YEL

2

LS3

3

4

HTR4

HTR3

BLK

2

RELAY 3

4

BLK

2

RELAY 1

4

YEL

YEL

COM

BRN

LS2

LS1

YEL

HTR2

BLK

6

RELAY 2

8

HTR1 BLK

XFORM

T1

DUMMY

T2

240 VAC

T3

208V 230V

PCB

RED

TRAN

BRN

SEE NOTE #3

2

RELAY 2

4

F

BLK

BLK

BLK

BLK

YEL

3

9

2

8

JW1

1

6 5 4

7

ORG

VIO

RED

RELAY

3

RELAY

2

RELAY

1

BRN

HPLV

LEADS

Y

W2

O

R

COM

SYSTEM TRANSFORMER: 40.0VA

FAN COIL/HEATER: 26.3VA

REMAINING VA AVAILABLE: 13.7VA

RED

208 V

RELAY 3

6 2

24 V

BRN

PCB

SEC 1

SEC 2

LED

3 2 1

6 5 4

9 8 7

F

R

C

Y

G

O

W2D

W2T

W3

Yo

1

8 4

RELAY 2

6 2

0

230 V

AUX -

GND

T1

T2

T3

F1

F2

AUX +

HI

LO

1

8 4

0

RELAY 1

6 2

L4 FU4 60A

L2 FU2 60A

L1 FU1 60A

L3 FU3 60A

GND

8 4

1 0

RED-LOW

BLU-MED

BLK-HI

GRN/YEL-GND

FM

BRN

BRN

YEL-COM

CAP

FAN MOTOR THERMALLY PROTECTED

LED FLASH CODES

NO LIGHT OR FLASH

NO POWER OR

BOARD FAILURE

COM

HI

MED

LO

FM

GRN/YEL

GND

R C Y G

NOTES:

1. Use copper wire (75

°

C min) only between disconnect switch and unit.

2. Connect low voltage wiring as shown (24VAC).

3. Connect transformer primary to the proper voltage terminal

4. To be wired in accordance with N.E.C. and local codes.

5. If any of the original wire, as supplied, must be replaced, use the same or equivalent type wire.

6. Replace low voltage fuse with no greater than 5 amp fuse.

7. Refer to thermostat instructions for "E" jumper installation.

8. Do NOT connect thermostat "E" to PCB "W3".

MINIMUM MOTOR LO SPEED TAP SELECTION

FAN COIL SIZE 030 033

MOTOR SPEED AT 20 KW MED MED

036

LO

038

LO

042

LO

048

LO

060 070

LO LO

CAP

COMM

F

FW

GND

HPLV

HTR

LS

O E W2

INDOOR THERMOSTAT

SEE NOTES #2, #7,AND #8

LEGEND

CAPACITOR

COMMON

LOW VOLT FUSE

FAN MOTOR

EQUIPMENT GROUND

HEAT PUMP LOW VOLT

HEATER

LIMIT SWITCH

324991-101

REV. A

C

LED

LVTB

TRAN

XFORM

DIAGNOSTIC LIGHT

LOW VOLT TERM BRD

TRANSFORMER

PCB TRAN TERMINALS

FIELD HIGH VOLTAGE

FIELD LOW VOLTAGE

HPLV LEADS

MARKED TERMINAL

PCB JUMPER (JW)

UNMARKED TERMINAL

STEADY LIGHT

STEADY FLASH

1 FLASH

2 FLASHES

3 FLASHES

4 FLASHES

5 FLASHES

6 FLASHES

7 FLASHES

BOARD FAILURE

STAND BY CONDITION

OR FAN ONLY

HEAT PUMP HEAT

ONLY OPERATING

HEAT PUMP PLUS

1 RELAY

HEAT PUMP PLUS

2 RELAYS

HEAT PUMP PLUS

3 RELAYS

COOL MODE

DEFROST MODE

EMERGENCY HEAT

MODE

USE THIS LABEL ON PRODUCTS WITH NEW CONTROLS. SEE

INSTRUCTION FOR DESCRIPTIONS.

→

Fig. 12—Typical 20kw Wiring Label

A00098

© 2000 CAC/BDP P.O. Box 70, Indianapolis, IN 46206 agfceh07 —12— Book/Tab: 1/3c, 4/2c Catalog No. 63FC-EH5