Installation

REMOVE OLD THERMOSTAT

1.Shut off electricity at the main fuse box until installation is complete. Ensure that electrical power is discon- nected.

2.Remove the front cover of the old thermostat. With wires still attached, remove wall plate from the wall. If the old thermostat has a wall mounting plate, remove the thermostat and the wall mounting plate as an assembly.

3.Identify each wire attached to the old thermostat using the labels enclosed with the new thermostat.

4.Disconnect the wires from old thermostat one at a time.

DO NOT LET WIRES FALL BACK INTO THE WALL.

5.Install new thermostat using the following procedures.

ATTACH THERMOSTAT BASE TO WALL

1.Remove the packing material from the thermostat.

2.If necessary, cut the non-electric heat jumper (see NON-ELECTRIC HEAT SYSTEMS). Check the set- ting of the O/B switch (see O/B TERMINAL SWITCH SELECTION).

3.If you want to review the thermostat features before mounting the thermostat on the wall, see ARMCHAIR

DEMONSTRATION.

4.Gently pull the thermostat cover straight off the base. Forcing or prying on the thermostat will cause damage to the unit.

5.Check that the system switch is in the OFF position. Connect wires beneath terminal screws on base using appropriate wiring schematic (see figs. 3 through 5).

6.Place base over hole in wall and mark mounting hole locations on wall using base as a template.

7.Move base out of the way. Drill mounting holes.

8.Fasten base loosely to wall, as shown in fig. 2, using two mounting screws. Place a level against bottom of base, adjust until level, and then tighten screws. (Lev- eling is for appearance only and will not affect thermo- stat operation.) If you are using existing mounting holes, or if holes drilled are too large and do not allow you to tighten base snugly, use plastic screw anchors to secure subbase.

9.Push excess wire into wall and plug hole with a fire- resistant material (such as fiberglass insulation) to prevent drafts from affecting thermostat operation.

NON-ELECTRIC HEAT SYSTEMS

Read the following information before clipping the non- electric heat jumper. If you are unsure of your application, contact a qualified serviceperson.

If your emergency or auxiliary system is non-electric (gas, oil, etc.) and will energize the blower, then jumper, W904, on the back of the thermostat base must be cut (see fig. 1).

W904

CUT FOR

NON-ELECTRIC

AUX.

BATTERY CUTOUT FOR

ARMCHAIR DEMONSTRATION

Figure 1. Back of thermostat base

Reset Button

Screw anchors

C		L	E
			E
	G		W2
			W2
		R	Y
		R
		O/B
	FAN
	ON	AUTO
		AUTO	OFF
			OFF	HEAT
				HEAT
			COOL

EMER

Mounting

holes

Figure 2. Thermostat base

If your emergency or auxiliary heat system is electric and requires that the thermostat energize the fan circuit, do not cut jumper W904.

O/B TERMINAL SWITCH SELECTION

The O/B switch on this thermostat is factory set to the “O” position. This will accommodate the majority of heat pump applications, which require the changeover relay to be energized in COOL. If the thermostat you are replacing or the heat pump being installed with this thermostat require the “B” terminal, to energize the changeover relay in HEAT, the O/B switch must be moved to the “B” position.

ARMCHAIR DEMONSTRATION

Armchair Demonstration is a unique feature that allows you to review your thermostat features before being mounted on the wall.

If you wish an Armchair Demonstration of your thermo- stat, temporarily hold a new 9-volt battery against the wires in the battery cutout on the back of the thermostat base for approximately 45 seconds. This will provide a charge that will last approximately 30 to 45 minutes to allow the thermostat to be observed.