Hunter 44920 Installation Manual

Getting Started
You will need a Phillips head screwdriver to complete this installation.
Tip: You may need a precision screwdriver (smaller tip) to detach wires from your old thermostat.
1. Power OFF Your HVAC System Unit
Go to your circuit breaker panel and turn off
Turn Power power to your compressor and furnace.
OFF
Read and save these instructions!
If you still need assistance after reading this manual, call our Technical Support at
USA: 1-888-830-1326 Canada: 1-866-268-1936
This thermostat is compatible with most 24V AC/millivolt systems with a maximum of 1 amp including: conventional oil,
gas, electric, hot water systems, single stage, and multi-stage heat pumps. This thermostat will not control line voltage
systems running 110V. Higher amp or line voltage systems will increase the risk of fire.
*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 device complies with RSS-GEN IC: Operation is subject to the following two conditions: (1) this device may not cause interference, and
(2) this device must accept any interference, including interference that may cause undesired operation of the device.
*Any alteration of this product, either intentional or unintentional, not expressly approved by the manufacturer could result in operation
failure of the device, inability to gain assistance from our technical team, or manufacturer refusing warranty support.
*This Class B digital apparatus complies with Canadian ICES-003.
2. Labeling Your Wires
A
Expose your existing thermostat wires.
Locate the wire terminals. If the wire terminals
are not visible, they may be connected to the
back of the wall plate.
DO NOT DISCONNECT THE WIRES
BEFORE LABELING THEM
Tip: To prevent your wires from falling back into the wall, wrap them around a pencil.
B
Label your wires.
As you remove each wire one at a time, find
the Hunter label with the corresponding
letter code and attach it to the wire.
C
Remove the existing wall plate and/or thermostat
.
Alternatively, you may want to take a picture of the wires on your old thermostat for reference.
If you have any wire codes that do not match the Hunter labels, you may have a system that
does not conform to industry standard. Call our Technical Support at 1-888-830-1326.
Wire Identification
O
Pre-Installed
RH, R
Jumper Clip Reversing valve for the heat
Power wire for heating pump; allows compressor to
supply air conditioning*
B
RC
Alternate reversing valve
Power wire for air conditioning for the heat pump; allows
compressor to supply heat*
W2
- Second stage of heat
Y, Y1
E
- Emergency heat
Controls your compressor outside
Aux
- Auxiliary wire
G Y2
Controls your fan to your HVAC system Second stage of cooling
C
W
Common wire used to
Furnace wire power the thermostat
when available
L
A
Allows the heat pump to tell
Only used with a 3 wire hot
the thermostat there may be a
water heating system
system problem
*Only 1 reversing valve is needed to run a heat pump. If both "O" and "B" are present, "B" may be a common wire.
3. Mounting Your Wall Plate
A B
Separate the wall plate. Insert the wires.
Pull the wall plate straight off Pass your labeled wires through
the back of your thermostat. the opening of the wall
C D
Install the top screw. Level the wall plate.
Partially tighten one Install the bottom screw.
screw into the top hole. Fully tighten both screws.
plate.