Carrier 33CS - Page 3

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The Unoccupied Heating Set Point is configured in Step 2.
The acceptable range of values is 35 to 99 F. The configuration
can also be set to OF (does not allow unoccupied heating).
After the desired temperature has been configured, press the
Mode button to continue to Step 3.
HEAT PUMP CONFIGURATION (Steps 3 and 4) — To set
the thermostat for heat pump operation, Advanced Setup
Step 3 must be configured to ON. Use the UP and DOWN
ARROW buttons to configure the step. The default is OFF.
Press the mode button to continue to Step 4. Step 4 is used to
set the reversing valve polarity for the heat pump. The variable
can be set to either “B” or “O.” Set the reversing valve polarity
to the correct value depending on the application. The default is
“O.”
NOTE:Step4willappearonlyifStep3issettoON.Step5
will appear only if Step 3 is set to OFF.
ELECTRIC HEAT CONFIGURATION (Step 5) — Step 5 is
used to configure the thermostat for electric heat. The variable
can be configured ON or OFF. The default is OFF.
NOTE:Step5willappearonlyifStep3issettoOFF.
DEADBAND (Step 6) — The Deadband is the difference in
temperature above the cooling set point or below the heating
set point that the thermostat will wait before turning on the first
stage of heating or cooling. For example, if the cooling set
point is 82 F (28 C) and the deadband is 2 degrees, the first
stage of cooling will not be energized until the temperature
reaches 84 F (30 C). The range of values is 1 to 6 degrees. The
default is 2 degrees.
SET POINT MINIMUM DIFFERENCE (Step 7) — The min-
imum difference between heating and cooling set points can be
user-configured. The range is from 0 to 6 degrees. The default
W2
TYPICAL
UNIT
L
C
G
Y1
E
O
W1
R
Y2
24 VAC COMMON
FAN RELAY
COMPRESSOR RELAY
1st STAGE HEAT CIRCUIT
24 VAC RETURN
2nd STAGE HEAT CIRCUIT
W2
Y2
R
W1
Y1
G
C
THERMOSTAT
B
O
W2
TYPICAL
UNIT
L
C
G
Y1
E
O
W1
R
Y2
24 VAC COMMON
FAN RELAY
COMPRESSOR RELAY
1st STAGE HEAT CIRCUIT
24 VAC RETURN
2nd STAGE COMPRESSOR RELAY
2nd STAGE HEAT CIRCUIT
W2
Y2
R
W1
Y1
G
C
THERMOSTAT
B
O
LEGEND
W2 — Second-Stage Heat
Y2 — Second-Stage Compressor
RS2 — Second Remote Sensor (Not Used)
RS+5 — +5 vdc
RS1 — Remote Sensor
RS GND — Ground
W1/O/B — First-Stage Heat or Reversing Valve
Y1 — First-Stage Compressor
G—Fan
W3/ECO — Economizer (Not Used)
CK1 — Dry Contact
CK2 — Dry Contact Ground
R—24 vac Transformer
C—24 vac Transformer Common
Fig. 2 — Thermostat Wiring
Fig. 3 — Typical Wiring (Single-Stage Cooling Units
and Two-Stage Heat Units)
Fig. 4 — Typical Wiring (Two-Stage Cooling Units
and Two-Stage Heat Units)
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