6MV
Millivolt
System
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| THERMOSTAT |
W | RH | 6 |
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| SYSTEM |
MV
RH
From millivolt system
W
MV
W
From millivolt system
Thermostat Terminal Connections
Figure 5. Typical Wiring Diagram for Millivolt Systems
From zone valve
6
64
Zone 5
Valve
12
MV | W | RH | THERMOSTAT | 6 |
| W | W | |
SYSTEM | 6 | |||||||
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| Hot |
| RH |
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| 24vAC | 120vAC |
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| RH |
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| Neutral | From 24vAC transformer | ||||
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| TRANSFORMER |
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| Thermostat Terminal Connections | |||
Figure 6. Typical Wiring Diagram for Heat Only, 3-Wire, Zone Valve Systems
ATTACH THERMOSTAT TO SUBBASE
!CAUTION
POWER TO THERMOSTAT MUST BE OFF BE- FORE ATTACHING THERMOSTAT TO WALL. FAILURE TO TURN OFF POWER BEFORE AT- TACHING THERMOSTAT MAY CAUSE EQUIP- MENT DAMAGE DUE TO RAPID COMPRESSOR CYCLING.
To attach thermostat to subbase, line up the plastic snap guides at the top of the thermostat and the six connector pins on the thermostat with the connectors near the top of the subbase. Gently pivot the thermostat down until the plastic snaps lock into place (see fig. 7). Be gentle when attaching thermostat. If the thermostat does not seem to be attaching to the subbase easily, make sure that the connector pins and plastic snaps are properly aligned, and that excess wire is pushed into the wall. Damage to the thermostat may occur if force is used.
ENGAGE TWO UPPER GUIDES;
PIVOT DOWN
Figure 7. Attaching thermostat to subbase
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