Installation Instructions

22
HIGH VOLTAGE! DISCONNECT ALL POWER BEFORE SERVICING.
MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO
MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
WARNING
ENCODED THERMOSTAT
PN. B1368271 REV. A
Q2
K3
ZD2
ZD3
Q1
ZD1
K2
K1
P1
GOODMAN MFG. CO. L.P.
J1
PJ6
PJ2
PJ4
OT1
OT2
HUM
12345678
PLEASE REFER
TO MANUAL
FOR PROPER
DIP SWITCH
CONFIGURATION.
W1 W2
RYCONCOM
O
W2 ED
S
WI
TC
H
DI
P
O
N
O
FF
24 VAC
C
R
Y1
W2W1
OUTDOOR
HEATPUMP
J2 J3
Y1RC G Y/Y2OT2 HUM
HUMIDISTAT
OT1OTC
W/W2E\W1
THERMOSTATS
GOODMAN MFG. CO. L.P.
ENCODED 2 SPD COOLING - WITH 1 OR 2 STG HEAT - 1 OT
Y2
Y1
C/X
YLO/Y1
Y/Y2
OUTDOOR
THERMOSTAT
CHET 18-60
ENCODED
THERMOSTAT
2 SPD REMOTE
CONDENSING
UNIT
TSTWK01
TRANSFORMER
TSTWK01
BOARD
TO COMMON ON
TSTWK01 BOARD
TO Y ON
TSTWK01 BOARD
HUMIDISTAT
(OPTIONAL)
SEE NOTE 2
2ND STAGE HEATER
1ST STAGE HEATER
NOTES:
1.) OT2 CLOSED AND W2 DEMAND ENABLES
2ND STG HEAT AND HI FAN
2.) STAT OPENS ON HUMIDITY RISE
3.) DIP SWITCH #4 MUST BE IN THE ON POSITION
CUT OT2 PJ2 FOR THIS CONFIGURATION
CUT HUM PJ6 FOR HUMIDISTAT OPERATION
Figure 37
Troubleshooting Encoded Two Stage Cooling Thermostats Options
TEST FUNCTION SIGNAL OUT SIGNAL FAN
S
T
E
T
S1 +
* S1 - *
S1 + -
S2 +
S2 -
S2 + -
S3 +
* S3 - *
* S3 + - *
R + -
COM
LOW SPEED COOL
* LO SPEED COOL *
HI SPEED COOL
LO SPEED HEAT
O
LO SPEED HEAT
HI SPEED HEAT
G
N/A
N/A
24 VAC
GND
YCON +
* YCON - *
YCON + -
W1 HEATER
ED -
( FUTURE USE )
W1 HEATER
W2 HEATER
NONE
N/A
N/A
R TO T'STAT
COM TO T'STAT
Y1
* Y / Y2 HI *
Y / Y2
W / W1
O
W / W1
EM / W2
G
N/A
N/A
R
C1 , C2
* ERROR CONDITION ( DIODE ON THERMOSTAT BACKWARDS )
* ERROR CONDITION ( S3 CAN ONLY READ + )
INDICATION
* ERROR CONDITION ( S3 CAN ONLY READ + )
INPUT
FROM
THERMOSTAT
POWER
TO
THERMOSTAT
NOTES:
1.) THE TEST SPADE CAN BE CONNECTED TO ANY OTHER TEST SPADE ON EITHER BOARD.
2.) THE + LED WILL BE RED AND WILL LIGHT TO INDICATE + HALF CYCLES.
THE - LED WILL BE GREEN AND WILL LIGHT TO INDICATE - HALF CYCLES.
BOTH RED AND GREEN ILLUMINATED WILL INDICATE FULL CYCLES DENOTED BY + - .
3.) SIGNAL OUT CONDITION FOR W1 , W2 HEATER WILL BE AFFECTED BY OT1 PJ4 AND OT2 PJ2
JUMPERS AND OUTDOOR THERMOSTATS ATTACHED. THE TABLE ABOVE ASSUMES OT1 PJ4 IS
REMOVED AND OT2 PJ2 IS MADE WITH NO OUTDOOR THERMOSTATS ATTACHED.
SEE NOTE 3
SEE NOTE 3
The chart above provides troubleshooting for either version of the encoded thermostat option. This provides diagnostic informa-
tion for the GMC CHET18-60 or a conventional two cool / two stage heat thermostat with IN4005 diodes added as called out in
the above section.
Wiring is subject to change, always refer to the wiring diagram on the unit for the most up-to-date wiring.