White Rodgers 1F82-261 User Manual

1F82-261

Programmable Electronic Digital

Heat Pump Thermostat

INSTALLATION AND

OPERATION INSTRUCTIONS

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.

DESCRIPTION

Your new White-Rodgers 5-Day/1-Day/1-Day Digital Thermo­stat uses the technology of a solid-state microcomputer to
provide precise time/temperature control. This thermostat offers
you the flexibility to design heating and cooling programs that fit
your needs.

Features:

• Separate 5-day (weekday) and 1-day/1-day (Saturday/Sunday)
programming with four separate time/temperature periods per day

• Simultaneous heat and cool program storage

• Preprogrammed temperature control

• Optional battery back-up for AC power loss

This thermostat is intended for use with a low voltage NEC
Class II system. Do not use this thermostat with a 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.

! 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.

• LCD continuously displays set point, and alternately dis­plays time and room temperature

• Continuous Backlit display option

• Temperature override until next program period

• Manual program override (HOLD temperature)

• Temporary HOLD

• °F/°C convertibility

• Temperature range 45° to 90°F

• R, C, Y, W2, G, O/B, E, and L terminals for single or two­transformer systems

PRECAUTIONS

! 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 (current limited)
circuits per the NEC code. Failure to do so could cause
a fire hazard.

ELECTRICAL DATA
Electrical Rating:

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

0.05 to 1.0 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

Operating Humidity Range:

0 to 90% RH (non-condensing)

Shipping Temperature Range:

-4°F to 149°F

WHITE-RODGERS

EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
www.white-rodgers.com

APPLICATIONS

For use with the following Class II systems:

• Standard heat pump systems with electric, gas or oil
Aux heat with 24VAC Hot and Common available

• Single-stage heat pump systems with no Aux heat with
24VAC Hot and Common available

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

PART NO. 37-6175D

Replaces 37-6175C

0225

INSTALLATION

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.

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 nonabsorbent 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 9797 Reavis
Road, St. Louis, MO, 63123-5398 for proper disposal.

ATTACH THERMOSTAT BASE TO WALL

1. Remove the packing material from the thermostat. Gently pull
the cover 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 figs. 2 through 4).

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. 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.

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.

ELECTRIC/GAS JUMPER (Fan Option)

Read the following information before clipping the nonelectric
heat jumper. If you are unsure of your application, contact a
qualified service person.

If your emergency or auxiliary system will energize the blower,
then jumper, W904, on the thermostat base must be cut (see
fig. 1).

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

OPTIONAL BATTERIES

With two "AA" batteries installed, your thermostat will maintain
time and continuously display the temperature during a loss

Optional (2) "AA" batteries

Screw anchors

O/B

0

4

Mounting

hole

switch

Mounting

hole

(below Fan switch)

Reset switch

W904

Electric/Gas

jumper

W

9

Figure 1. Thermostat Base

of AC power. Installed batteries will also allow programming
prior to installation.

ENERGY MANAGEMENT RECOVERY

(EMR)

When the EMR feature is activated the thermostat's microcom­puter calculates the time it will take to change the room
temperature to the next heat or cool program setting. Then the
thermostat will start the system before the next programmed
period so that the desired temperature is reached at or near the
beginning of the period (the thermostat calculates 15 minutes
for every 1°F temperature change). This minimizes the use of
auxiliary stages during the transition period to reduce energy
costs.

For example: The thermostat is programmed to provide an
overnight heating temperature of 66°F, and during the next
program period, beginning at 6:00 AM, the programmed tem­perature is 70°F. With EMR activated, the thermostat will auto­matically start the heating system at 5:00 AM, so that the
programmed temperature of 70°F is reached by about 6:00 AM.

If the overnight room temperature drops only to 68F°, the
thermostat will start the system at 5:30 to reach the programmed
temperature of 70°F at 6:00.

The thermostat is shipped with the EMR feature active, which
means that the thermostat will start the heating system before
the beginning of the next program period. This feature provides
better efficiency by allowing gradual temperature changes using
only the first stage of heat.

To deactivate the EMR function, see the Configuration menu
on Page 5). The thermostat will then wait until the programmed
time to start the system for a temperature change.

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 requires a “B” termi­nal, to energize the changeover relay in HEAT, the O/B switch
must be moved to the “B” position.

2

G W2

Aux

Relay

See Note **

Emergency

Changeover

Relay*

Compressor

Contactor

* Changeover Relay is energized in COOL when O/B switch is in the “O” position

Changeover Relay is energized in HEAT when O/B switch is in the “B” position

Fan

Relay

(Stage 2)

** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency

Figure 2. Typical wiring diagram for single transformer systems

NOTE

If safety circuits are in
only one of the systems,
remove the transformer
of the system with NO
safety circuits.

CUT AND

TAPE OFF!

HOT

120 VAC

NEUTRAL

* Changeover Relay is energized in COOL when O/B switch is in the “O” position

Changeover Relay is energized in HEAT when O/B switch is in the “B” position

** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency

24 VAC

Changeover

Relay*

Compressor

Contactor

Figure 3. Typical wiring diagram for two transformer systems with NO safety circuits

G W2

Fan

Relay

See Note **

Emergency

Aux

Relay

(Stage 2)

TWO COMMONS MUST
BE JUMPERED TOGETHER!

E

Relay

E

Relay

CYO/B

CYO/B

SYSTEM

MONITOR

SWITCH

SYSTEM

MONITOR

SWITCH

L

THERMOSTAT

R

SYSTEM

24 VAC

TRANSFORMER

(Class II Current Limited)

L

THERMOSTAT

R

Limit or

Safety

Switches

24 VAC

(Class II Current Limited)

120 VAC

Neutral

SYSTEM

TRANSFORMER

Hot

Hot

120 VAC

Neutral

G W2

See Note **

Changeover

Relay*

Compressor

Contactor

* Changeover Relay is energized in COOL when O/B switch is in the “O” position

Changeover Relay is energized in HEAT when O/B switch is in the “B” position

** Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency

Fan

Relay

Aux

Relay

(Stage 2)

E

CYO/B

Emergency

Relay

TWO COMMONS MUST
BE JUMPERED TOGETHER!

SYSTEM

MONITOR

SWITCH

Figure 4. Typical wiring diagram for two transformer systems with safety circuits in BOTH systems

L

R

COMMON

Limit or

Switches

Limit or

Safety

Switches

Polarity must be observed. If the HOT side of

NOTE

the second transformer is jumpered to the
COMMON side of the first transformer a short
will be made. Damage to equipment will occur
when power is restored.

THERMOSTAT

Safety

ACCESSORY

RELAY N.O.

24 VAC

24 VAC

CONTACT

COMMON

Current Limited)

24 VAC 120 VAC

Heat Pump Transformer

(Class II Current Limited)

SYSTEM

Auxiliary

Heating

Transformer

(Class II

120 VAC

Limit or

Safety

Switches

NOTE

The accessory relay scheme
is required when safety
circuits exist in both systems.

Limit or

Safety

Switches

NEUTRAL

HOT

NEUTRAL

HOT

3