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To Prevent electrical shock and/or equipment damage,
disconnect electrical power to the system at the main fuse
or circuit breaker until installation is complete.
Removal & Installation
Before removing wires from old thermostat's switching
subbase, label each wire with the terminal designation it
was removed from.
1. Shut off the electricity at the main fuse box until
installation is complete. Ensure that electrical power is
disconnected.
2. Remove Old Thermostat: A Standard heat/cool
thermostat consists of three parts:
a. The Cover, which may be either a snap on or hinge type.
b. The Base, which is removed by loosening all captive
screws.
c. The switching subbase, which is removed by unscrewing
the mounting screws that hold it on the wall or adaptor
plate.
3. Remove the front cover of the old thermostat. WIth the
wires still attached, remove the wall plate from the wall. If
the old thermostat has a wall mounting plate, remove the
thermostat and the wall mounting plate as an entire
assembly.
4. Identify each wire attached to the old thermostat.
5. Disconnect the wires from the old thermostat one at a
time. Do not let the wires fall back inside of the wall.
6. Install the new thermostat and use the following wiring
diagrams.
Battery Location
The thermostat can function on 2 x "AA" alkaline
batteries as an alternative source of power.
If
change is displayed, the batteries are low
and should be replaced. For best results, replace
batteries once a year. To replace batteries, install the
batteries along the top of the base. The batteries must
be installed with the positive (+) ends to the right.
Wiring Diagrams
1
Optional
C
Typical Wiring Diagram For Heat Only, 3 Wire, Single Transformer Systems
2
Optional
Typical Wiring Diagram For Cool Only, 3 Wire, Single Transformer Systems
220V
220V
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