Fig. 6–Typical 24-v Circuit Connections
A93199
4
4
RH
R
Y
G
A
W
LLS
NC
TRANS
MIN 60VA
TO IFM LINE
VOLTAGE
POWER
SUPPLY
IFR
C
C
BLU
BRN
Y
COND UNIT
THERMOSTAT
SUBASE
RC
B
Y
1
Y
2
G
W
1
W
2
LEAVE JUMPER
ON SUBASE
(RH TO RC)
LLS
NC
TRANS
SEE NOTE 2
TO IFM LINE
VOLTAGE
POWER
SUPPLY
C
BLU
BRN
HC
1
HC
2
ADD JUMPER
R
Y
G
A
W
IFR
TO IFM LINE
VOLTAGE
POWER
SUPPLY
C
BLU
BRN
HC
NOTES: 1. REFER TO UNIT LABEL WIRING DIAGRAM FOR
WIRE COLORS. IFR, IFM AND LLS ARE LOCATED
INDOORS ON HEATING-COOLING APPLICATIONS.
IF ACCESSORY IFR IS REQUIRED FOR COOLING-
ONLY APPLICATIONS, LOCATE IFR IN FAN COIL.
2. N.E.C. CLASS 2, 24V CIRCUIT, MIN 40VA REQUIRED.
ARRANGEMENT A–COOLING ONLY
ARRANGEMENT C–1 TRANSFORMER;
COOLING AND 2-STAGE HEATING
C
– CONTACTOR
HC
– HEATING CONTROL
IFM
– INDOOR FAN MOTOR
LLS
NC
– NORMALLY CLOSED
– LIQUID LINE SOLENOID VALVE
TRANS – TRANSFORMER
IFR
TRANS
SEE NOTE 2
LLS
NC
ARRANGEMENT B – 1 TRANSFORMER;
COOLING AND 1-STAGE HEATING
—7—
