Two Speed Heat Pump (3 Stage Heat / 2 Stage Cool)
12 |
| UP | HVAC SYSTEM |
Dehumidier | (D) | Dehumidifier | |
11 | Humidifier | (H) | Humidifier |
10 | Compressor Stage 2 (Y2) | Comp Stage 2 Relay | |
9 | Ground Fault | (L) | Fault Relay |
8 | Fan | (G) | Fan Relay |
7 | Compressor Stage 1 (Y1) | Comp Stage 1 Relay | |
6 | Energized in Heat | (B) |
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5 | Energized in Cool | (O) | Reversing Valve |
4 | Auxilirary Heat | (W2) | Aux Heat Relay |
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3 | 24VAC Common* | (C) |
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1 | 24VAC "HOT" | (RC) |
| 24VAC |
THERMOSTAT | CONTROL |
TRANSMFOMER |
Figure 10 – Connections for two speed heat pump thermostat
CONFIGURATION
The “System Type” for this thermostat must be set to “Heat Pump” under “System Options”.
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.
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