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Warning, Installation, Remove old thermostat – White Rodgers 1F95-1291 User Manual

Page 2: Installing new thermostat, Battery location, Power stealing switches

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2

Remove Old Thermostat

Before removing wires from old thermostat, mark wires for
terminal identification so the proper connections will be made
to the new thermostat.

Installing New Thermostat

1. Pull the thermostat body off the thermostat base. Forcing

or prying on the thermostat will cause damage to the unit.

2. Place base over hole in wall and mark mounting hole

locations on wall using base as a template.

3. Move base out of the way. Drill mounting holes. If you

are using existing mounting holes and the holes drilled
are too large and do not allow you to tighten base snugly,
use plastic screw anchors to secure the base.

4. Fasten base snugly to wall using mounting holes shown

in Figure 1 and two mounting screws. Leveling is for
appearance only and will not affect thermostat operation.

5. Connect wires to terminal block on base using appropriate

wiring schematic.

6. Push excess wire into wall and plug hole with a fire resis-

tant material (such as fiberglass insulation) to prevent
drafts from affecting thermostat operation.

7. Carefully line the thermostat up with the base and snap

into place.

Battery Location

2 "AA" alkaline batteries are included in the thermostat at the
factory with a battery tag to prevent power drainage. Remove
the battery tag to engage the batteries.
To replace batteries, set system to

OFF, remove thermostat

from wall and install the batteries in the rear along the top of
the thermostat (see Figure 1). For best results, use a premi-
um brand "AA" alkaline battery such as Duracell

®

or Ener-

gizer

®

. If the home is going to be unoccupied for an extended

period (over 3 months) and

is displayed, the batteries

should be replaced before leaving.

Power Stealing Switches

The Power Stealing Switches (Fig. 1) should be left in the
"On" position for most systems. The information in the
following table details the thermostat power method and
switch options.

WARNING

!

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

INSTALLATION

Figure 1 – Thermostat Base Multi-Stage 1F95-1291

2 "AA" Batteries

Power
Stealing
Switches

Stack

Power

Stealing

Switch

Mounting

Hole

Mounting

Hole

Place Level

across Mounting Tabs

(for appearance only)

Place Level
across Mounting Tabs
(for appearance only)

+
S

HM

-

W/E

6

DHM

Y2

O/B

L

Y

W2

Rear view of thermostat

Thermostat Power Method

Switch Position/Description

Battery Powered, no 24
Volt system power available.

Switches

"On", thermostat

runs on batteries.

Hardwired with Battery
Back-up,
for 24 Volt systems
with common connection from
transformer to "C" terminal
on thermostat.

Switches

"On", thermostat

runs on power directly from
transformer with battery back-
up.

*Battery Powered with
Power Stealing Assist,

for 24 Volt systems with no
common connection from
transformer to "C"

terminal on

thermostat.

Switches

"On", thermostat

runs on batteries and
supplemental power drawn
through the heat or cool circuit.

*Power Stealing Assist is very reliable to increase battery life,
but on a small number of heating or cooling systems with high
impedance electronic modules you may observe one of the
following conditions:
1. The furnace draft inducer motor may run with no call for

heat.

2. The furnace fan may turn on with no call for heat or may

not turn off.

3. The furnace may not turn off when the call for heat ends.
4. The air conditioner may not turn off when the call for cool

ends.

If the Power Stealing Assist method is not compatible with
your system, place the Power Stealing Switches to

"Off". This

cancels Power Stealing Assist, operates the thermostat on
batteries and corrects the condition.