Sears 1F86-382 User Manual

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FAILURE TO READ AND FOLLOW ALL iNSTRUCTiONS CAREFULLY
BEFORE iNSTALLiNG OR OPERATING THiS CONTROL COULD CAUSE
PERSONAL iNJURY AND/OR PROPERTY DAMAGE,

1F86-382

Non-Programmable Electronic Digital Thermostat

iNSTALLATiON AND

OPERATION iNSTRUCTiONS

__hese instructions for fu__

DESCRiPTiON

Your new Digital Thermostat uses the technology of asolid-state
microcomputer to provide precise temperature control.

Features:

• Simultaneous heat and cool setpoint storage

• Pre-set temperature control

• Backtit display

• LCD continuously displays setpoint and room temperature

• °F/°C convertibility

This thermostat is intended for use with a tow voltage system;
do not use this thermostat with a line voltage system. If in doubt

about whether your wiring is mitlivolt, line, or low voltage, have
it inspected by a qualified heating and air conditioning contrac-

tor 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.

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

• Temperature range 45° to 90°F

• RC, RH, C, W, Y, G, O and B terminals

• Optional C terminal (Dual Power option)

• B and O terminals for single stage heat pumps (no auxiliary

heat) or damper operation

• Setpoint storage in case of power loss

• 2 "AA" alkaline batteries included

PRECAUTIONS

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 installati on and all components of the sys=
tern shall conform to Class II circuits per the NEC code.

ELECTRICAL DATA APPLICATIONS
Electrical Rating:

8 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 150°F

For use with:

• Standard heat/cool or heat only systems

• Electric heat systems

• Gas or oil fired systems

• Gas systems with intermittent ignition devices (I.I.D.)

and/or vent dampers

• Hydronic (hot water or steam) systems

• Single-stage heat pump systems (no auxiliary heat)

o Mitlivolt systems

DO NOT USE WITH:

• Multi-stage systems

• Systems exceeding 30 VAC and 1.5 amps

• 3-wire zoned hydronic heating systems

SPECIFICATIONS

PART NO. 37-6925A

0811

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 with sand or other absorbent material and
place into a container which can be sealed. If a celt 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, Batesvitle, AR 72501-2117 for proper disposal.

ELECTRIC HEAT OR SINGLE-STAGE

HEAT PUMP SYSTEMS

This thermostat is configured from the factory to operate a heat/
cool, fossil fuel (gas, oil, etc.), forced air system. It is configured

correctly for any system that DOES NOT require the thermostat
to energize the fan on a call for heat. If your system is an electric
heat or heat-pump system that REQUIRES the thermostat to
turn on the fan on a call for heat, locate the GAS/ELECTRIC
switch on the back of the thermostat (see fig. 1)and switch it to

the ELECTRIC position. This will allow the thermostat to ener-
gize the fan immediately on acall for heat. Ifyou are unsure ifthe
heating/cooling system requires the thermostat to control the
fan, contact a qualified heating and air conditioning service
person.

ATTACH THERMOSTAT BASE TO WALL

1. Remove the packing material from the thermostat. Gently pull the
coverstraight offthe base. Forcing orprying onthe thermostatwill
cause damage to the unit. If necessary, move the electric heat

switch (see ELECTRIC HEAT SYSTEMS, above).

2. Connect wires beneath terminal screws on base using
appropriate wiring schematic (see figs. 2 through 7).

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.

Screw anchors

Mounting

holes

Figure 1. Thermostat Base

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.

s

Electric/Gas

switch

Mounting

holes

BATTERY LOCATION

2 "AA" alkaline batteries are included in the thermostat at the
factory with a battery tag to prevent power drainage. You must

remove the battery tag to engage the batteries.
If "LO BATTERY" is displayed, the batteries are tow and

should be replaced. For best results, replace all batteries with
new premium brand alkaline batteries such as Duracetl ® or

EnergizeP. To replace batteries, install the batteries along the
top of the base (see Fig. 1). The batteries must be installed with
the positive (+) end to the left.

HYDRONIC (HOT WATER OR STEAM)

HEATING SYSTEMS

This thermostat is set to operate properly with a forced-air
heating system. Ifyou 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. Change the second option

in the configuration menu to SL (see CONFIGURATION MENU,
page 4).

CHECK THERMOSTAT OPERATION

If at any time during testing your system does not operate
properly, contact a qualified service person.

Turn on power to the system.

Fan Operation

If your system does not have a G terminal connection, skip to
Heating System.

1. Move FAN switch to ON position. The blower should begin

to operate.

2. Move FAN switch to AUTO position. The blower should stop
immediately.

JUMPER

WIRE

( mm ( _(_ 2_£_-__-TAT

T2S7o

F_r%H, eaton!y, ] _ Neutral
attach to RH and W J TRANSFORMER

Figure 2.Typical wiring diagram for

heat only, 3-wire, single transformer systems

JUMPER

WIRE

TRANSFORMER

Figure 3. Typical wiring diagram for

cool only, 3-wire, single transformer systems

RED jumper wire (provided with thermostat) must be|

connected between thermostat RN and RC terminals| JUMPER
for proper thermostat operation with this system. U WIRE

]

Co_

E

_'J SYSTE:o t

T _ Neutrat

| HEATING

J TRANSFORMER

24VAOI-I 1412°vAC

--Lj-- _

COOLING TRANSFORMER

Figure &Typical wiring diagram for

heat/cool, 5-wire, two-transformer systems

JUMPER JUMPER

WIRE WIRE

T _T_v "_ T s_szEM

ICompressorll Fan I I
I e°ntaot°r IRL_

1 4woULjz wc

* Reversing valve is energized when the _Neutral

system switch is in the COOL position TRANSFORMER

Figure 6.Typical wiring diagram for heat pump

with reversing valve energized in COOL

JUMPER JUMPER

WIRE WIRE

}mpressor II ran I I
;ontaotor IU

! .J 24VACU L__--_C

TRANSFORMER

Figure 4. Typical wiring diagram for

heat/cool, 4=wire, single transformer systems

* Reversing valve is energized _hen file LJ Neutral

system switch is in the HEAT position TRANSFORMER

Figure 7.Typical wiring diagram for heat pump

with reversing valve energized in HEAT

_EThe 24 Volt neutral connection to terminal C on the thermostat is not required ifthe batteries are replaced once a year

with fresh premium brand alkaline batteries,

Heating System

1. Move SYSTEM switch to HEAT position. Ifthe heating system
has a standing pilot, be sure to light it.

2. Press (_ to adjust thermostat setting above room tempera-
ture. The heating system should begin to operate.

3. Press (_ to adjust temperature setting below room tem-
perature. The heating system should stop operating.

To prevent compressor and/or property damage, if the
outdoor temperature is below 50°F, DO NOT operate the
cooling system.

1. Move SYSTEM switch to COOL position.

2. Press (_) to adjust thermostat setting below room tempera-
ture. The blower should come on immediately on high
speed, followed by cold air circulation

3. Press (_) to adjust temperature setting above room tem-
perature. The cooling system should stop operating.

Cooling System