Setting Subbase Switches (If Applicable)
The subbase system switch controls system
operation as follows:
HEAT—Heating system is controlled by the
thermostat. Cooling system is off.
COOL—Cooling sytem is controlled by the
thermostat. Heating system is off.
OFF—Both the heating and cooling sytems are
off. If the fan switch is in the AUTO position,
the fan is also off.
AUTO—In cooling only application, only cooling
operates. In heating only applications, only
heating operates.
The subbase fan switch controls fan operation
as follows:
ON—Fan operates continuously.
AUTO—Fan operates with cooling equipment as
controlled by the thermostat or with heating
equipment as controlled by the plenum fan
switch. In electric heat, heat pump and fan coil
systems, the fan is controlled by the thermo-
stat in heating and cooling.
To switch positions, use thumb or index finger
to slide lever to desired position. Switch lever
must stop in detent over desired function
indicator mark for proper circuit operation.
Inserting Clock Batteries
Power is supplied to the clock by the 24 Vac
transformer. Backup batteries (not included) may
be installed to supply power to the clock when
power is interrupted. Install batteries in thermo-
stat as shown in Fig. 2. Once a year or when
batteries are dead, replace with two new AAA
alkaline batteries. We recommend Energizer
batteries.
BATTERY LOCATION FOR
(2) AAA BATTERIES;
INSTALL WITH POSITIVE
ENDS UP
M7188
Fig. 2—Inserting Clock Batteries.
8
9 69-0639—1
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