Set anticipator to match the setting of your old thermostat you noted in Step 3, or, the
anticipator should be set to match the current rating stamped on your main heating
control. The heat anticipator is adjustable from 0.15 to 1.2 amps. Adjust the anticipa-
tor by rotating the contact arm (see fig. 5). The anticipator setting is indicated by the
numbers on the base that the pointer points to. If you are unsure where to set the
anticipator contact the heater manufacturer for a recommended setting.
Move the pointer counterclockwise to
lengthen
heating system cycles; move
clockwise to shorten
heating cycles.
Adjustments should not be greater than
1/2 marking at a time.
For millivolt operation, rotate contact arm to
Millivolt Link.
Snap on Cover:
Carefully align the cover
with the base and snap the cover onto
the base.
SET HEAT ANTICIPATOR
Figure 5. Anticipator adjustment
Figure 5. Anticipator adjustment
Rotate contact arm
to adjust heat anticipator
Arrow points to the
current rating of
the primary control
Figure 5. Anticipator adjustment
Millivolt Link
NEW THERMOSTAT OPERATION
Thermostat on Subbase. After power is turned on, use the system switch to select
either heating or cooling, or to turn the heating/cooling system off. Use the fan switch
to control fan operation. When the fan switch is in the AUTO position, the fan will
cycle with the heating or cooling system (the fan will not run if the system switch is
in the OFF position and the fan switch is in the AUTO position). When the fan switch
is in the ON position, the fan will run continuously, regardless of system switch posi-
tion (even if the system switch is set to OFF, the fan will run if the fan switch is in the
ON
position).
Thermostat on wallplate.
For heat only move the temperature lever to the highest
temperature. For cool only move the temperature lever to the lowest temperature.
SPECIFICATIONS
ELECTRICAL DATA
Switch Rating
...................................... 24 VAC (30 VAC max.)
Heating.................................................. 0.15 to 1.2 Amps
Cooling.................................................. 0 to 1.5 Amps
Anticipator Rating:
Heating.................................................. Adjustable from 0.15 to 1.2 Amps
Cooling.................................................. Fixed
THERMAL DATA:
Temperature Range
............................. 50°F to 90°F (10°C to 32°C)
Operating Humidity Range
................. 0 – 90% noncondensing
Figure 2. Typical wiring for single transformer heating/cooling system
RH W B O Y G RC A
24 VAC
120 VAC
Hot
Neutral
TRANSFORMER
Compressor
Relay
Fan
Relay
Figure 2. Typical wiring for single transformer
heating/cooling system
Figure 3. Typical wiring for two-transformer
heating/cooling system
RH W B O Y GA
24 VAC
120 VAC
Hot
Neutral
TRANSFORMER
Heat
Relay
Compressor
Relay
Fan
Relay
24 VAC
120 VAC
Hot
Neutral
TRANSFORMER
RC
Figure 3. Typical wiring for two-transformer heating/cooling system
Figure 4. Typical wiring for single transformer,
single stage heat pump system
W BO YG A
24 VAC
120 VAC
Hot
Neutral
TRANSFORMER
Compressor
Relay
Fan
Relay
* * *
Factory-Installed Jumper
* * *
Terminal energized
in cooling
Terminal energized
in heating
RH
Field-Installed Jumper
RC
Figure 4. Typical wiring for single transformer, single stage heat pump system
Figure 5. Typical wiring for single transformer heating system
TRANSFORMER
R YW
24 VAC
120 VAC
Hot
Neutral
Heat
Relay
WR
24 VAC
120 VAC
Hot
Neutral
TRANSFORMER
Y
Compressor
Relay
Figure 6. Typical wiring for single transformer cooling system
Figure 7. Typical wiring diagram heat only, 3-wire zone valve systems
6
MV
B
O
Y G W RC
THERMOSTAT
Hot
120 VAC
24 VAC
Neutral
TRANSFORMER
SYSTEM
Zone
Valve
6 4
5
21
RH
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