Carrier 33CS Installation, Start-Up, And Operating Instructions Manual page 7

O/W2
Y1/W2
R
G
Y/Y2
W/W1
C
B
L
DO NOT USE
SEE NOTE 3
S1
S2
COMMERCIAL
THERMOSTAT
O/W2
Y1/W2
R
G
Y/Y2
W/W1
C
B
L
DO NOT USE
S1
S2
COMMERCIAL
THERMOSTAT
ACCESSORY
HEAT
HR
IFC
NOTES:
1. Set DIP switch A to OFF. Set DIP switch B to ON if Emer-
gency Heat is required.
2. If thermostat DIP switch SWB is ON (Emergency Heat), and
compressors lock out, the X terminal on the unit will ener-
gize the L terminals on the thermostat and the thermostat
will automatically enter Emergency Heat mode.
Fig. 7 — Thermostat Wiring (38AQS012,016)
Fig. 8 — Thermostat Wiring (50HQA)
W1
Y1
R
C
Y2
C
W2
X
38AQS012,016
5
A
Y1
R
O
Y2
G
50HQA
NOTE: Set DIP switch A to ON.
7
LEGEND
— Not Used
B
— Common
C
G — Fan
HR — Heat Relay
IFC — Indoor Fan Contactor
L — Compressor Lockout
O — Reversing Valve (Not Used)
R — 24 VAC Power
S1,S2 — Remote Sensor
W1 — First Stage of Heat
W2 — Second Stage of Heat
Y1 — First Stage of Cooling
Y2 — Second Stage of Cooling
LEGEND
— Not Used
B
— Common
C
G — Fan
L — Compressor Lockout
(Not Used)
O — Reversing Valve
R — 24 VAC Power
S1,S2 — Remote Sensor
W/W1 — Not Used
W2 — Not Used
Y1 — Not Used
Y/Y2 — Second Stage of Cooling