Filter
Top Products
1
1
1
1
Two Speed Heat Pump (3 Stage Heat / 2 Stage Cool)
Comp Stage 2 Relay
Comp Stage 1 Relay
Compressor Stage 2
9
5
4
1
3
8
6
7
11
12
(D)
(H)
(L)
(G)
(Y1)
(B)
(O)
(W2)
(C)
(RC)
UP
HVAC SYSTEM
THERMOSTAT
24VAC
CONTROL
TRANSMFOMER
Dehumidier
Humidifier
Ground Fault
Fan
Compressor Stage 1
Energized in Heat
Energized in Cool
Auxilirary Heat
24VAC Common*
24VAC "HOT"
Aux Heat Relay
Reversing Valve
Fan Relay
Fault Relay
Humidifier
Dehumidifier
(Y2)
10
Figure 10 – Connections for two speed heat pump thermostat
CONFIGURATION
¾ The “System Type” for this thermostat must be set to “Heat Pump” under “System Options”.
¾ The “Cool Stages” and “Heat Stages” settings must be configured under “Stage Settings”.
POWER UP
1. Double check wiring, be sure that there are no stray wires or wire strands at the connections.
2. Connect power to the transformer and system. The display will show the current thermostat settings.
3. Press [FAN] and select “On”. The fan should come on.
4. Press [FAN] and select “Auto”. The fan should go off.
5. Set the Mode to "Heat". Raise the desired heat setting 1 degree above the current temperature. Ensure
that the heat pump comes on, in heating mode. Press [HOLD] and select “On” to override Energy
Efficient Control. Stage 2 heat should come on.
6. Raise the desired heat setting 3 degrees above the current temperature. Auxiliary heat should come on.
7. After a few minutes, set the mode to "EM Heat". Both stages of the heat pump should stop but the
auxiliary heat should remain on. Set the mode to “Off”. Ensure that the auxiliary heat goes off.
8. Press [HOLD] and select “Off” to enable Energy Efficient Control. Set the Mode to "Cool". Lower the
desired cool setting 1 degree below the current temperature. Ensure that the heat pump comes on, in
cooling mode. Press [HOLD] and select “On”. Stage 2 cool should come on.
9. Set the mode to "Off". Ensure that both stages of the cooling unit go off.
10. Press [HOLD] and select “Off” to enable Energy Efficient Control.