Filter
Top Products
3
To prevent electrical shock and/or equipment
damage, disconnect electrical power to system,
at main fuse or circuit breaker, until installation is
complete.
To prevent personal injury and/or equipment dam-
age, check equipment manufacturer’s wiring of
fan relay circuit when in EMER HEAT. When the
thermostat system switch is in the EMER HEAT
position, the thermostat DOES NOT energize the
fan relay when the fan switch is in the AUTO
position.
This typical wiring diagram shows only the terminal iden-
tification and wiring hookup. Always refer to wiring
instructions provided by equipment manufacturer for sys-
tem hookup.
All wiring should be installed in accordance with local and
national codes and ordinances.
CAUTION
!
NOTE
FAN CAUTION
!
If a malfunction switch is wired to
terminal L, the check light will indi-
cate a malfunction when switch
contacts close.
THERMOSTAT
SUBBASE
HEAT PUMP
SYSTEM
Figure 2. Typical wiring diagram
Fixed Stage 1 Heat
& Cool Anticipator
Adjustable Stage 2
Heat Anticipator
COOL
STAGE 1
HEAT
STAGE 2
HEAT
System
Switch
Fan
Switch
TRANSFORMER
24 VAC120 VAC
AUTO ON
COOL
OFF
HEAT
EMER.
COOL
OFF
HEAT
EMER.
FAN
RELAY
EMER. HEAT
RELAY
AUXILIARY
HEAT RELAY
COMPRESSOR
CONTACTOR
EMER
Light
AUX Light
Malfunction
Switch
The auxiliary light cycles with stage
2 heat in either HEAT or EMER sys-
tem switch positions.
YW2EL X1RG
CHECK
Light
B
*
O
*
The emergency light cycles with
emergency heat.
*
Reversing Valve – if the reversing valve in your heat pump energizes
during HEAT, then make your electrical connection at terminal B on
the subbase. If the reversing valve is energized during COOL, then
make your connection at terminal O on the subbase.
Always refer to equipment manufacturer’s instructions for proper
identification of the reversing valve electrical connections.