3 REMOVING OLD THERMOSTAT continued from first page

ATTENTION! This product does not contain mercury. However, this product may replace a unit which contains mercury.

Do not open mercury cells. If a cell becomes damaged, do not touch any spilled mercury. Wearing non-absorbent gloves, take up the spilled mercury and place into a container which can be sealed. If a cell becomes damaged, the unit should be discarded.

Mercury must not be discarded in household trash. When the unit this product is replacing is to be discarded, place in a suitable container and return to White-Rodgers at 2895 Harrison Street, Batesville, AR 72501-2117 for proper disposal.

4 MOUNTING AND WIRING

!WARNING

Do not use on circuits exceeding specified voltage. Higher voltage will damage control and could cause shock or fire hazard.

Do not short out terminals on gas valve or primary control to test. Short or incorrect wiring will damage thermostat and could cause personal injury and/or property damage.

Thermostat installation and all components of the system shall conform to Class II circuits per the NEC code.

!CAUTION

Take care when securing and routing wires so they do not short to adjacent terminals or rear of thermostat. Personal injury and/or property damage may occur.

TERMINAL CROSS REFERENCE CHART
New ThermostatOther Manufacturers’
Terminal Designation

Terminal Designation

RH

4

RH

M

W

W

W

H

Attach Thermostat Base to Wall

1.Remove the packing material from the thermostat. Gently pull the body straight off the base. Forcing or prying on the thermostat will cause damage to the unit.

2.Connect wires beneath terminal screws on base using appropriate wiring schematic (see fig. 2).

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

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

5.Fasten base loosely to wall, as shown in fig. 1, using two mounting screws. Adjust until level, and then tighten screws. (Leveling is for appearance only and will not affect thermostat 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.

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

Hydronic (Hot Water or Steam)
Heating Systems

This thermostat is set to operate properly with a forced-air heating system. If you have a hydronic heating system (a system that heats with hot water or steam), you must set the thermostat to operate properly with your system.

The factory default setting is forced air heat. Clipping jumper W905 on the circuit board will produce a longer heating cycle which is normally for hot water or steam (hydronic) systems. Both settings produce a very accurate temperature control and can be set to your personal preference. As received, the thermostat cycles the system just under 1°F. With W905 clipped, the system cycles at approximately 1.5°F.

Battery Location
This thermostat requires 2 “AAA” alkaline batteries to operate.

If “LO BATTERY” appears on the display, the batteries are low and should be replaced with fresh “AAA” Energizer® alkaline batteries. The batteries are located on the back of the thermostat body (see fig. 1).

JUMPER

WIRE

THERMOSTAT

B

O

Y

G

W

RC RH

SYSTEM

Heating

System

Hot

24 VAC

120 VAC

Neutral

TRANSFORMER

Figure 2. Typical wiring diagram forheat only, 2-wire, single transformer systems

2