Hunter 42996 - Manual

INSTALLATION

JUST RIGHT
DIGITAL THERMOSTAT

If the code letter

on your existing

thermostat is. . .

then mark the

wire with label

shown. . .

and connect

to thermostat

terminal shown

RH, R, VR or 4

24 Volt

RC, VC

24 Volt Cool

G or F

Fan

Y, C or M

Air Conditioning

Compressor

W or H

Heating

Form No. 41970-01 Rev 4/4/2006

®

Low Battery

Indicator:

Flashes when

batteries need

to be replaced.

System

Switch:

Selector

switch for

Heat, Cool,

and Off.

Fan Switch:

Fan switch for

Automatic or

Continuous fan

operation.

Battery

Compartment:

Front access allows

easy insertion

of two AA 1.5V

batteries.

Up and Down Keys:

Keys for changing the

Temperature setting.

Also used for adjust-

ing the Span.

Filter Key:

Resets the

filter change

counter to

zero.

Reset: Press with a

paper clip to reset the

thermostat and return

to power-up settings.

Front Doors: Covers

keys and batteries

when not used for

neat appearance.

Open with one

finger from top or

bottom.

LCD Display:

Shows Room

Temperature, Set

Temperature, and

other feature

information as

required.

Filter Change Indicator:

Flashes when filter

needs to be checked.

Congratulations!

Your new Hunter thermostat will provide years of reliable service. Using this

digital thermostat will provide more uniform comfort in your home through

the seasons. Thank you for buying a Hunter product!
Please read this manual for complete instructions on installing and operating

your thermostat. If you require further assistance, call Hunter Technical Support

at 1-888-830-1326 from 8am to 5pm Central Time.
Remove the mylar label from the display window.

IMPORTANT INFORMATION

1. This thermostat is designed to work on the following systems:

• Gas - Standing Pilot

• Gas - Electronic Ignition

• Gas - Fired Boilers

• Gas - Milivolt Systems

• Oil - Fired Boilers

• Oil - Fired Furnace

• Electric Furnace

• Electric Air Conditioning

This thermostat will NOT control single-stage or multi-stage heat pumps or

110/220 V baseboard electric heating systems.

2. Temperature Range

This thermostat can be set between 45°F and 95°F (7°C and 35°C). However,

it will display room temperatures from 30°F to 99°F (0°C and 37°C). “HI” will

be displayed if the temperature is higher than 99°F (37°C), and “LO” will be

displayed if the temperature is lower than 30°F (0°C).
This thermostat will automatically cutoff in Heat mode if the temperature rises

above 95°F (35°C), and automatically cutoff in Cool mode if the temperature

drops below 45°F (7°C).

3. Compressor Protection

This thermostat provides a 3.5 minute delay after shutting off the cooling system

before it can be restarted. This feature will prevent damage to your compressor

caused by rapid cycling. It does not prevent a rapid compressor restart due to

short power outages.

4. Battery Warning

Two fresh AA alkaline batteries should provide well over one year of service.

However, when the batteries become drained, the Low Battery Indicator will

flash on the display. When this message occurs, install new alkaline batteries.

You have approximately 1 minute to change the batteries and keep the ther-

mostat’s settings. Once the batteries have become too low to ensure proper

operation, your system will be turned Off, and the display will be cleared except

for flashing Low Battery Indicator on the LCD display.

CAUTION: When only the battery icon flashes on the display, the ther-

mostat is shut down, and your system will no longer operate. In this

condition, there is no temperature control of your dwelling.

NOTE: If you plan to be away from the premises over 30 days, we recommend

that you replace the old batteries with new alkaline batteries prior to leav-

ing.

5. Notes

This device complies with Part 15 of the FCC Rules. Operation is subject to the

following two conditions: (1) this device may not cause harmful interference,

and (2) this device must accept any interference received, including interference

that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class

B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed

to provide reasonable protection against harmful interference in a residential

installation. This equipment generates, uses and can radiate radio frequency en-

ergy and, if not installed and used in accordance with the instructions, may cause

harmful interference to radio communications. However, there is no guarantee

that interference will not occur in a particular installation. If this equipment

does cause harmful interference to radio or television reception, which can be

determined by turning the equipment off and on, the user is encouraged to try

to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to

which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

FEATURES

What You Need

This thermostat includes two #8 slotted screws and two wall anchors

for mounting. To install your thermostat, you should have the fol-

lowing tools and materials.
• Slotted Screwdriver(s)
• Small Philips screwdriver
• Hammer
• Electric drill and 3/16” bit
• Two 1.5 V (AA) size alkaline batteries

Remove Old Thermostat

CAUTION: Do not remove any wiring from existing thermostat before

reading the instructions carefully. Wires must be labeled prior to

removal.
IMPORTANT! Turn off the power to the furnace at the main power

panel or at the furnace.

Remove existing thermostat cover and thermostat. See Figure 1. Some ther-

mostats will have screws or other locking devices that must first be removed.

Once the wall mounting plate is exposed, look for wires.
If wires are not visible, they may be connected to the back of the wallplate.

Again, look for screws, tabs, etc. Some models have doors that open to expose

wires and mounting screws. See Figure 1.

Wire Labeling

• Each wire coming from the wall to the existing thermostat is connected

to a terminal point on that thermostat. Each of these terminal points is

usually marked with a code letter as shown in Table A below.

• The number of wires in your system can be as few as two (for heat only

systems), as many as eight, or any number in between. If you follow the

labeling procedures correctly, you do not have to be concerned about how

many wires there are.

• There is often no terminal marking on the existing thermostat of two wire,

heat only systems. Just connect either of the wires to the Rh terminal, then

connect the other wire to the W terminal to complete the circuit.

• IMPORTANT! BEFORE DISCONNECTING ANY WIRES, APPLY THE SELF-AD-

HESIVE LABELS PROVIDED TO THE WIRE AS SHOWN IN TABLE A BELOW.

(For example, attach the label marked W to the wire that goes to the W

or H terminal on your existing thermostat.) IGNORE THE COLOR OF THE

WIRES since these do not always comply with the standard.

• After labeling wires, disconnect them from the existing thermostat ter-

minals.

• Remove existing wallplate. To make sure wires do not fall back into wall

opening, you may want to tape them to the wall.

• If hole in wall is larger than necessary for wires, seal this hole with insulating

material so that no hot or cold air can enter the back of the thermostat

from the wall. This air could cause a false thermostat reading.

NOTE: Do not connect a “Common” wire (sometimes labeled “C”) to any

terminal on this thermostat. Tape up the wire and do not use. This wire provides

electricity to non-battery powered thermostats.

Typical Home Thermostats

Table A

Mount Wallplate and Thermostat

• Remove the wallplate from your thermostat by pressing the release tab on

the bottom of the thermostat. See Figure 2.

Figure 2

• Position wallplate on wall and pull existing wires through large opening.

Then level for appearance. Mark holes for plastic anchors provided, if your

existing holes do not line up with those on the wallplate.

• Drill holes with 3/16” bit and gently tap anchors into the holes until flush

with wall.

• Reposition wallplate to wall, pulling wires through large opening. Insert

mounting screws provided into wall anchor and tighten. See Figure 3.

Figure 3

NOTE: 5-wire Systems

If your thermostat has one wire marked R or Rh (2, 3, or 4-wire system), then

leave the jumper wire between the Rh and Rc terminals on the wallplate.

Otherwise, if you have separate Rh and Rc wires (5-wire system), then remove

the jumper wire between the Rh and Rc terminals.

Connect Wires and Mount
Thermostat to Wallplate

• Match and connect the labeled wires to the appropriate coded terminal

screws on the wallplate. (See Figure 4, 5.) Ignore any wires which may be

present, but which were not connected to the old thermostat.

Figure 5

Figure 4

• Be sure to tighten the terminal screws securely, otherwise a loose wire

could cause operational problems with your system or thermostat.

• Push excess wire back into the hole to prevent interference when installing

the thermostat to the wallplate.

• Make sure the System Switch is set to OFF, and the Fan Switch is set to

AUTO.

• Insert the tabs on top of the thermostat body into the slots at the top of

the wallplate. Press the bottom of the thermostat body into the snap on

the bottom of the wallplate. Refer to Figure 2. (NOTE: Do not force the

thermostat onto the wallplate, as the terminal pins may be damaged. If it

does not snap properly, the thermostat may not work.)

• Insert the two AA size alkaline batteries, observing the polarity marked

inside the battery compartment.

• Switch on the main power at the panel or furnace.

Owners Manual

Model 42996

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