Wall Mounting Plate
Thermostat
Cover
Wall Mounting Plate
Thermostat
Cover
Owners Manual
Model 47999B
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
• 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 tem-
perature 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 thermostat’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
thermostat 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 leaving.
FEATUrES
InSTaLLaTIOn
• Gas - Fired Boilers
• Gas - Milivolt Systems
JUST rIGhT
DIGITAL ThErMOSTAT
LCD Display:
Shows Room
Temperature,
Set Tempera-
ture, and other
feature informa-
tion as required.
Low Battery In-
dicator: flashes
when batteries
need to be
replaced.
filter Change
Indicator: flashes
when filter needs
to be checked.
Front Doors:
Covers keys
and batteries
when not
used for neat
appearance.
Open with one
finger from top
or bottom.
Reset: Press with a
paper clip to reset the
thermostat and return
to power-up settings.
System
Switch:
Selector
switch for
Heat, Cool,
and Off.
fan Switch:
fan switch for
automatic or
Continuous
fan operation.
Battery Compart-
ment:
front access al-
lows 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.
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 thermostats 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.
Typical Home Thermostats
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-ADhESIVE 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
terminals.
• 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.
Table a
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.
If the code letter on
your existing thermo-
stat 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 Com-
pressor
W or H
Heating
figure 2
• Position wallplate on wall and pull existing wires through large
opening. Then level for appearance. Mark holes for plastic an-
chors 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 termi-
nals 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 4
figure 5
• refer to the Wiring Diagrams below to be sure your system is
wired correctly.
• 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.
Mount Wallplate and Thermostat
• remove the wallplate from your thermostat by pressing the
release tab on the bottom of the thermostat. See figure 2.
form no. 42791-01 Rev 08-04-2008
