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THIS COMPARTMENT MUST BE CLOSED EXCEPT FOR SERVICING
BLOWER MOTOR
SCHEMATIC DIAGRAM
FIELD POWER WIRING
L3
L1
L1
CB2
CB1
YEL
YEL
YEL
YEL
YEL
YEL
PLUG
9
9
RECP
SPT
YEL
YEL
CAP
COM
BRN
BRN
YEL
HI
BLK
FM
MED
BLU
LO
RED
NOTES:
1. Use copper wire (75˚ C min.) only between disconnect switch and unit.
2. To be wired in accordance with N.E.C. and local codes.
3. If any of the original wire, as supplied, must be replaced, use the same or
equivalent type wire.
4. Replace low voltage fuse with no greater than 5 amp fuse.
5. Use 60 amp class K fuses only, for replacement.
6. (3) speed motor shown. Optional (2) speed motor uses HI (BLK) and LOW
(BLU or RED).
7. Connect R to R, G to G, etc., see outdoor instruction for details.
8. Smaller heaters will have fewer components.
E. Transformer Failure:
1. Check 208-v and 230-v transformer connections. They may
be miswired.
CIRCUIT BOARD FUNCTION AND TROUBLESHOOTING
HK61GA001 and HK61GA003 Circuit Boards
This section of the service manual describes the HK61GA001 and
HK61GA003 printed-circuit boards (PCB) by examining the
functional operation of the printed-circuit board's components.
I. PCB COMPONENT LAYOUT AND DESCRIPTION
Layout of the actual printed-circuit boards are depicted in
Fig. 6 and Fig. 7.
1. The low-voltage terminal board is used to connect the
indoor thermostat to the low, 24-v side of the transformer,
and to serve as a junction between the indoor thermostat and
the outdoor section.
ROTATION
DISCONNECT PER NEC
SEE RATING PLATE
FOR VOLTS & HERTZ
SEE NOTE #1
L3
GND
L4
CB2
INTERNAL PROTECTION MAY
BE EITHER FUSES OR CIRCUIT
BREAKERS
RELAY 3
HTR4 BLK
LS4
4
2
RELAY 2
HTR3 BLK
LS3
8
6
RELAY 2
HTR2 BLK
LS2
4
2
RELAY 1
HTR1 BLK
LS1
2
4
BLU
BLK
RELAY 1
22 VDC COIL
R E C
BLU
BLK
ORN
3
2
11
7
3
2
11
7
BLU
BLK
NC
GRY
G
NO
R
RED
FR
F
BRN
T
1
PCB
BLK
C
208V
230V
C
R
W
RED
GRN
BARRIER
YEL
TRAN
GND
BRN
INDOOR
THERMOSTAT
324984-101 REV. A
→ Fig. 5—Wiring Diagram of Relay Heater
NOT SUITABLE FOR USE ON SYSTEMS EXCEEDING 150V
NE CONVIENT PAS AUX INSTALLATIONS DE PLUS DE
L4
L2
L2
RELAY 1
CB1
6
2
8
4
BLK
1
0
BLK
REC
RELAY 2
BLK
6
2
BLK
RELAY 2
8
4
22 VDC COIL
1
0
T D R
TDR
RELAY 3
RELAY 3
22 VDC COIL
6
2
RED
BRN
R E C
BRN
8
4
GRY
VIO
1
0
6 1
4
TDR
6
1
4
BRN
SEE NOTE #6
CB
CIRCUIT BREAKER
G
WHT
CAP
CAPACITOR
COM
COMMON
SEE NOTE #8
LOW VOLTAGE
OUTDOOR
UNIT
F
FUSE
FM
FAN MOTOR
FIELD POWER
WIRING
FR
PCB FAN RELAY
LINE FUSE
FU
EQUIPMENT GROUND
GND
FAN SPEED TAP
SPT
LOCATION
MINIMUM MOTOR SPEED SELECTION
FAN COIL SIZE
MOTOR SPEED AT 20 KW
2. Break off the tabs.
a. W2-3 — Used to control (stage) the second stage of
electric heat. The first stage controlling electric heat and
the indoor fan are interlocked through diodes.
b. W2-E — Used to control (stage) the third stage of
electric heat.
3. A fuse is used to protect the low-voltage transformer.
4. AUX 1 and AUX 2 are connections for the latent capacity
control, delay off kit, 2-speed kit and air conditioning
accessories.
5. F1, F2, F3, and F4 are connections for the indoor fan.
6. EAC1 and EAC2 are 240-v connections, which parallel fan
lead connections, for the electronic air cleaner.
7. L1 and L2 are 240-v connections which parallel power
input.
—8—
CAUTION:
TO GROUND
ATTENTION:
150 V A LA TERRE
COMPONENT ARRANGEMENT
HTR3
HTR1
HTR2
LS1
LS 3
LS2
& 4
R3
R2
R1
SYSTEM TRANSFORMER: 40.0VA
FAN COIL/HEATER: 11.8VA
REMAINING VA AVAILABLE: 28.2VA
COM
RED
24 V
208 V
L4
FU4
230 V
BRN
FU2
L2
L1
FU1
L3
FU3
GND
C
T
1
F
R
G
NC
L4 L3
L2 L1
PCB
NO
FR
CB1
SPT
60A 60A
60A 60A
RED-LOW
BRN
FM
BLU-MED
BRN
BLK-HI
GND
YEL-COM
GRN/YEL-GND
FAN MOTOR THERMALLY PROTECTED
LEGEND
HTR
HEATER
LIMIT SWITCH
LS
MARKED TERMINAL
PLUG AND
RECEPTACLE
PRINTED CIRCUIT
PCB
BOARD
RECTIFIER
REC
TRANSFORMER
TRAN
UNMARKED
TERMINAL
TIME DELAY
TDR
RECTIFIER
018 024 030 036 042 048 060 070
--
-- MED LO LO
LO LO
CB2
CAP
LO
A99121E
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Troubleshooting
