Hunter Fan 40120 Thermostat User Manual

Table of Contents

Important Information .......................................5

Tools.................................................................6

Uninstalling the Existing Unit............................ 9

Installing the Thermostat ................................12

Installing the wall plate ...................................14

connecting the wires...........................15

attaching the thermostat ..................... 17

Operation........................................................20

Indicators & Adjustments................................22

Troubleshooting..............................................25

Wiring Diagrams.............................................27

Electronic/Mechanical

Thermostat

Model 40120

Congratulations!

Thank you for choosing a Hunter thermostat.

Your new Hunter thermostat will provide years of

reliable service and year-round energy savings.

Please read this manual before beginning

installation and save this booklet for complete

operation instructions.

IMPOꢀTAꢁT IꢁFOꢀMATIOꢁ

This thermostat is designed to work on the following

heating and cooling systems:

Gas – Standing Pilot

Gas – Electronic Ignition

Gas – Fired Boilers

Gas – Millivolt Systems

Oil – Fired Boilers

Oil – Fired Furnace

Electric Furnace

This thermostat is not designed for heat pump

systems or 110/220 V baseboard heating systems.

If you are unsure what kind of heating and cooling

system you have, please contact a qualiﬁed HVAC

Technician for assistance.

TOOꢂS

This thermostat includes two #8 slotted screws and

two wall anchors for mounting.

To install your new thermostat, you will need the

following supplies:

Flat-head screwdriver

.....................................................................................

Small Phillips-head screwdriver

.....................................................................................

Hammer

.....................................................................................

Electric drill and 3/16” bit

.....................................................................................

Two fresh 1.5 Volt (AA) size alkaline batteries

.....................................................................................

ꢁOTICE! Do not disconnect the wires

from the existing thermostat before

reading these instructions. The wires

must be labeled prior to removal to

ensure proper reconnection.

UꢁIꢁSTAꢂꢂIꢁG THE EꢃISTIꢁG UꢁIT

. Turn the system power OFF from the existing

thermostat. Turn the power to the HVAC

system OFF at the main power panel or at the

furnace.

2. ꢀemove the existing thermostat cover to

access the wires from the wall.

(Some thermostats may have multiple covers, screws

or other locking devices that must be removed or

disengaged.)

. ꢂocate, but do not disconnect the wires.

(If wires are not visible, they may be connected to the

back of the wall plate. Some models may have doors

that open to expose the wires and mounting screws.)

If your existing

thermostat is marked...

label the wire

with this sticker:

H ꢀ

ꢀH / ꢀ / Vꢀ / 4

24 Volt

ꢀH

W / H

heating

fan

G / F

See page 27 for complete wiring diagram.

UꢁIꢁSTAꢂꢂIꢁG THE EꢃISTIꢁG UꢁIT, COꢁT.

. Using the provided stickers, label each wire

according to the chart.

(If the terminals are not labeled, contact a

qualiﬁed HVAC technician.)

ꢁ

ote: Wire colors do not always comply with

standards, so wire color should be ignored.

efer to the existing terminal designation for

ꢀ

proper identiﬁcation.

If a wire marked C is present, C may be a

Common wire and should not be used. If you have

a wire marked C, do not connect it to any terminal.

This wire is used only for non-battery powered

thermostats.

. Do not let the wires slip back into the wall

during disconnection. You may want to secure

the wires to the wall as you disconnect them.

After all wires are labeled, disconnect each

wire and remove the existing wall plate.

IꢁSTAꢂꢂIꢁG THE THEꢀMOSTAT

. ꢀemove the new thermostat from the back

plate by pulling the two halves apart.

Wall Plate

Thermostat

IꢁSTAꢂꢂIꢁG THE THEꢀMOSTAT, COꢁT.

IꢁSTAꢂꢂIꢁG THE WAꢂꢂ PꢂATE

2. Position the new wall plate on the wall and pull

the labeled wires through the opening.

. If the existing holes do not match those on the

Hunter wall plate, or if there are no existing

holes, level the wall plate and mark the wall for

two holes.

. ꢀemove the wall plate and drill two 3/16” holes

where marked.

. Tap the plastic anchors into the holes until they

are ﬂush with the wall.

. ꢀeposition the wall plate on the wall, pulling the

wires through the opening. Insert the mounting

screws through the mounting holes and into the

anchors. Verify that the thermostat is visually

level and securely tighten both screws.

IꢁSTAꢂꢂIꢁG THE THEꢀMOSTAT, COꢁT.

COꢁꢁECTIꢁG THE WIꢀES

1. ꢂoosen, but do not remove, the terminal

screws.

. Match and connect the wires from the wall

to the terminals as shown. Wires should be

inserted behind the black terminal shields.

Tighten each screw after the connection has

been made.

(The ends of any extra wires should be wrapped in

electrical tape and carefully pushed back into the wall.)

. Push any excess wire length back into the wall

to prevent interference.

HE/HG Switch

IꢁSTAꢂꢂIꢁG THE THEꢀMOSTAT, COꢁT.

ATTACHIꢁG THE THEꢀMOSTAT

. ꢂocate the HE/HG s w it c H on the back of the

thermostat. Set the switch to HG for a gas

furnace or oil burner. Set the switch to HE for

electric furnaces.

5. Insert two fresh AA alkaline batteries.

6. Align the thermostat with the the wall plate,

and snap the two halves together.

. ꢀestore power at the electrical panel or

furnace.

Thermometer Set Temperature

Slider

System

Switch

SYSTEM

OFF

HEAT

AUTO

Fan

Battery Indicator

Switch

OPEꢀATIOꢁ

. Set the sE t tE m p E r a t u r E s l id E r to the desired

temperature.

. The sy s t E m sw it c H determines the operating

mode of the thermostat. Select Of f or HE a t .

. The fa n sw it c H should normally be located in

the au t O position. To run the fan continuously,

slide the fa n sw it c H to the On position.

ꢁ

ote: In au t O , The fan will be turned on along with normal

operation of your system. In a normal gas or oil furnace, the

fan will be turned on by your furnace after its warm-up delay.

IꢁDICATOꢀS AꢁD ADUSTMEꢁT

. The tH E r m O m E t E r indicates the room

temperature.

. The Ba t t E r y in d ic a t O r displays two stages of

wE a k Ba t t E r y wa r n in G , indicated by the Ba t t E r y

in d ic a t O r ﬂashing once approximately every

second. When this warning appears, install

two fresh AA alkaline batteries at your earliest

convenience.

. The second warning is the sH u t -d O w n in d ic a t O r ,

indicated by the Ba t t E r y in d ic a t O r ﬂashing

approximately twice every second. When this

warning appears, the thermostat is shut down

and will turn your system OFF. Your system

will remain shut-off until you install two fresh

AA alkaline batteries.

Span Adjust SPAN

IꢁDICATOꢀS AꢁD ADꢄUSTMEꢁTS, COꢁT.

Your thermostat is preset to cycle your system

off and on at 1 F above and below the Set

Temperature. For maximum system efﬁciency and

a sustained comfortable temperature your system

should cycle 3 - 5 times per hour. If your system is

cycling either too often or not often enough, then

use a small Phillips-head screwdriver to turn the

sp a n ad j u s t left or right to change the cycle time.

1. ꢀemove the thermostat from the wall plate.

. To make your system run ꢂOꢁGEꢀ, turn the

sp a n ad j u s t clockwise.

. To make your system run SHOꢀTEꢀ, turn the

sp a n ad j u s t counter clockwise.

4. ꢀeattach the thermostat to the wall plate.

o o

ꢁ

ote: The Span range is 0.6 F - 3 F. The Span setting remains

the same in both the Heat and Cool modes and can be

changed regardless of what position the System Switch is in.

1. My heating or cooling will not turn on or off.

a. Check the HE/HG switch to ensure it is set to the correct

position.

b. Check the circuit breakers and switches to ensure there is

enough power to the system.

c. ꢀeplace the batteries with fresh AA alkaline batteries.

d. If applicable, make sure the furnace blower door is closed

properly.

......................................................................................

2. My system continues to operate when the

thermostat is in the off position.

a. ꢀeplace unit.

TꢀOUBꢂESHOOTIꢁG

Is there help on the web?

Yes. Visit http://www.hunterfan.com for more information.

...................................................................................

........

Can’t I just call someone?

Sure. Our Technical Support Group is available from 8 am

to 5 pm CST. They may be reached toll-free at1-888-830-

1326.

WIꢀIꢁG DIAGꢀAMS

2-wire Heat Only System

Heat 24V or

Millivolt Supply

Heat Relay

or Valve

3-wire Heat Only System

Fan

Relay

Heat 24V

Supply

Heat Relay

or Valve