WIRING DIAGRAMS
Figure 1 – Heat Pump Systems
Jumper
| L | O/B | Y | Y2 | W/E |
| W2 | G | RH | RC | C | A1 | ||||||||||||
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Heat Pump 1 |
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| Heat Mode |
| Heat Mode | Blower/ |
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(HP1) |
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| Energized in |
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| 2nd Stage |
| 3rd Stage. | Circulator |
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Diagnostic |
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| Emergency |
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| Cool Mode | Heat and |
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| Fan Energized | 24 Volt | 24 Volt | Optional* |
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| Indicator |
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| Output | Emergency |
| Mode 2nd | on Call for | 24 Volt |
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| or System | B | Cool Mode |
| Stage | (Hot) | (Hot) |
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| Heat or Cool. | (Com- |
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| Malfunction | 1st Stage |
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| Mode |
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| Heat | Cool |
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Heat Pump 2 | Energized in | 2nd |
| Heat Mode | Set Elect/Gas | mon) |
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Switch | (Compressor) | 1st Stage |
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(HP2) |
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| Heat, Off, |
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| 4th Stage. | Option for |
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| Emergency |
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| (Com- | Heat mode |
| Emergency | Emergency |
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| Mode |
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| pressor) | 3rd Stage |
| Mode 2nd | Mode |
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Heat Pump Connections
If you do not have a heat pump system, refer to figures 2 & 3.
Refer to equipment manufacturers' instructions for specific system wiring information.
You can configure the thermostat for use with the following heat pump systems.
HEAT PUMP TYPE 1 (HP 1). Single stage
compressor system; gas or electric backup.
Comfort Alert II Module |
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or Similar System | NEUTRAL |
Diagnostic Module | 24VAC |
See Module Instructions | HOT |
for details |
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* Common connection required for diagnostic or malfunction indication. | CLASS II |
TRANSFORMER |
HEAT PUMP TYPE 2 (HP 2).
gas or electric backup.
After wiring, see INSTALLER CONFIGURA- TION section for proper thermostat configura- tion.
Figure 2 – Single Stage or Multi-Stage System (No Heat Pump)
with Single Transformer
Jumper
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| L | O/B | Y | Y2 | W/E | W2 | G | RH | RC | C | A1 | ||||||||||||
System |
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Single | Diagnostic | O |
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| Blower/ |
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Energized Constantly |
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Stage 1 |
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| No Output | Circulator |
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Indicator | in |
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(SS1) |
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| Heat |
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| Fan Energized | 24 Volt | 24 Volt | Optional* |
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Input | Cool Mode |
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| Cool Mode | Output | Mode |
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| on Call for | (Hot) | (Hot) | 24 Volt |
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| or |
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| System | B | 1st Stage |
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| 1st Stage |
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| Cool (and | Heat | Cool | (Com- |
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Multi- | Malfunction |
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| Cool |
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| Heat Mode | Heat if |
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Stage 2 | Switch | Energized Constantly |
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| 2nd Stage | configured |
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in Heat, Off, |
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| for Electric |
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(MS2) | Input |
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| 2nd |
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| Emergency |
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| Heat) |
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Comfort Alert II Module | NEUTRAL |
or Similar System | |
Diagnostic Module | 24VAC |
See Module Instructions | HOT |
for details |
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Single Stage and Multi-Stage Con- nections
Refer to equipment manufacturers' instructions for specific system wiring information.
This thermostat is designed to operate a
You can configure the thermostat for use with the following fossil fuel systems:
SINGLE STAGE (SS 1) gas, oil or electric.
120VAC tion.
CLASS II
TRANSFORMER
* Common connection required for diagnostic or malfunction indication.
Figure 3 – Single Stage or Multi-Stage System (No Heat Pump)
with Two Transformers
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| Jumper | Remove Jumper Wire | |
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| between RH & RC | ||
| L | O/B | Y | Y2 | W/E | W2 | G | RH | RC | C | |
System |
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Single |
| O | B |
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| Blower/ |
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Stage 1 |
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| No Output | Circulator |
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(SS1) | Diagnostic | Energized | Energized |
| No | Heat |
| Fan Energized | 24 Volt 24 Volt | Optional | |
| Indicator | Constantly | Constantly | Cool Mode | Output | Mode |
| on Call for | (Hot) | (Hot) | 24 Volt |
Multi- | (Optional) | in | in Heat, Off, 1st Stage | Cool | 1st Stage | Heat Mode | Cool (and | Heat | Cool | (Com- | |
| Cool Mode | Emergency |
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| Heat if |
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Stage 2 |
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| Mode |
| Mode |
| 2nd Stage | configured |
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(MS2) |
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| 2nd |
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| for Electric |
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| Heat) |
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| NEUTRAL |
NEUTRAL |
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| 24VAC | |
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| HOT | ||
120VAC | 24VAC |
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| HOT |
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| CLASS II |
HEATING |
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| TRANSFORMER | |
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CLASS II |
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TRANSFORMER |
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NOTE: If continuous backlight or hard- wired power input are desired but do not function in both HEAT and COOL modes, cut the heating transformer 24V wires and tape off. Connect the neutral circuit disconnected from the heating trans- former to the neutral circuit of the cooling transformer. Disconnect the wire to the RH terminal and install a jumper between RH and RC. Depending on the system requirements, replace the cooling trans- former with a 75VA class II transformer if
needed.
120VAC
COOLING
Figure 4 – 3-Wire (SPDT) Heat Only Zone Valve Wiring
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| Jumper |
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6 | Y | W | G | RH RC | C |
System
Single Stage
Closes
Valve
(6)
Opens
Valve
(4)
Blower/Circulator
Fan Energized
24 Volt | 24 Volt | Constant |
24 Volt | ||
(Hot) | (Hot) | (Com- |
Heat | Cool | mon) |
(5) |
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NEUTRAL
24VAC
HOT
120VAC
CLASS II
TRANSFORMER
3
