White Rodgers 1F89-11 User Manual

1F89-11

Non-Programmable Electronic Digital

WHITE-RODGERS

Operator: Save these instructions for future use!

FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE
PERSONAL INJURY AND/OR PROPERTY DAMAGE.

Heat Pump Thermostat

INSTALLATION AND

OPERATION INSTRUCTIONS

DESCRIPTION

Your new White-Rodgers Digital Heat Pump Thermostat
uses the technology of a solid-state microcomputer to
provide precise temperature control. This thermostat of­fers you the flexibility to set heating and cooling tempera­tures that fit your needs.

Features:

• Simultaneous heat and cool temperature storage

• LCD continuously displays set point and room tem­perature

This thermostat is intended for use with a 24-volt system;
do not use this thermostat with a millivolt or line voltage
system. If in doubt about whether your wiring is millivolt,
line, or low voltage, have it inspected by a qualified
heating and air conditioning contractor or electrician.

Do not exceed the specification ratings.
All wiring must conform to local and national electrical

codes and ordinances.
This control is a precision instrument, and should be

handled carefully. Rough handling or distorting compo­nents could cause the control to malfunction.

• °F/°C convertibility

• Temperature range 45° to 90°F

• Eight terminals for single or two-transformer systems

• O/B terminal for heat pump systems

• Armchair Demonstration Capability

PRECAUTIONS

CAUTION

!

To prevent electrical shock and/or equipment
damage disconnect electric power to system at
main fuse or circuit breaker box until installation
is complete.

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.

ELECTRICAL DATA
Electrical Rating:

20 to 30 VAC 50/60 Hz. or D.C.

0.05 to 1.5 Amps (Load per terminal)

1.5 Amps Maximum Total Load (All terminals
combined)

THERMAL DATA
Setpoint Temperature Range:

45°F to 90°F (7°C to 32°C)

Operating Ambient Temperature Range:

32°F to 105°F

WHITE-RODGERS DIVISION

EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398

Operating Humidity Range:

0 to 90% RH (non-condensing)

Shipping Temperature Range:

-40°F to 150°F

APPLICATIONS

For use with:

• Heat pump systems with up to two stages heat,

DO NOT USE WITH:

• Millivolt systems

• Systems exceeding 30 VAC and 1.5 amps

• 3-wire zoned hydronic heating systems

Printed in U.S.A.

SPECIFICATIONS

one stage cool

PART NO. 37-5741A

Replaces 37-5612B

9636

INSTALLATION

Figure 1. Back of thermostat base

W904
CUT FOR
NON-ELECTRIC
AUX.

O

B

BATTERY CUTOUT FOR
ARMCHAIR DEMONSTRATION

Figure 2. Thermostat base

AUTO

FAN ON

COOL

OFF

HEAT

EMER

Reset Button

Mounting

holes

Screw anchors

L

E

Y

W2

O/B

R

G

C

REMOVE OLD THERMOSTAT

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

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 set­ting 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. (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.

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

NON-ELECTRIC HEAT SYSTEMS

Read the following information before clipping the non­electric 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).

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 thermo­stat, 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.

2