Wiring Diagrams; Troubleshooting; Selector Switches - Hunter 42999 Owner's Manual

Wiring Diagrams

4-wire Heat/Cool System
Wallplate
Terminals
Fan Heat Relay Cool Heat/Cool
Relay or Valve Contactor 24V Supply
5-wire Heat/Cool System
Wallplate
Terminals
Fan Heat Relay Cool Heat 24V
Relay or Valve contactor Supply
2-wire Heat Only System
Wallplate
Terminals
Heat Relay
or Valve
3-wire Heat Only System
Wallplate
Terminals
Fan Heat Relay
or Valve
Relay
3-wire Cool Only System
Wallplate
Terminals
Fan Cool
Relay contactor
X - No Connection

Selector Switches

In order for this thermostat to control your system, the system type
must be specified by the selector switches on the printed circuit
board inside the thermostat. There is also a selector switch for your
choice of Fahrenheit or Celsius temperature display.
• Heating System Selector (HG - HE switch)
The factory position for this switch is in the "HG" position.
Leave it in this position if you have a gas furnace or an oil burner.
If you have an electric furnace, test to see whether the Heat
and Fan come on as expected after installation. If the Fan op-
eration is normal, leave it in the "HG" position. If the Fan does
not come on within a minute of the thermostat calling for heat,
change the switch position to "HE". The system selector has no
effect in the cooling mode.
NOTE: "HG" position is for gas and most other systems. "HE"
position is for certain electric systems having a fan relay.
• F° / C° selector (Fahrenheit / Celsius)
Your thermostat is set for F° mode from the factory. In order to
change to C° mode, slide the switch to C° and press the reset
button on front of the thermostat with a paper clip.
NOTE: Unless the reset button is pressed, the thermostat will
not change temperature mode.
Temperature Display
(SW4)
Figure 6
Form No. 41497-01 Rev 6-29-2001
OPERATION
Start-up
Jumper
The LCD will show the factory de-
fault display of 70°F (21°C) when
batteries are first installed, or after
the Reset button is pressed. The
temperature will update after a few
seconds.
System Selector Switch
No Jumper
Fan Switch
Cool 24V
Supply
Jumper
Review Current Set Temperature
Heat 24V or
Millivolt Supply
• Press either the up or down key for less than 1 second to see
the Set Temperature.
The factory default is 68°F (20°C) when started with the System
Switch Off or Heat, and 78° (26°C) when started with the System
Switch on Cool.
Jumper
Setting New Temperature
Heat 24V
Supply
Jumper
Cool 24V
Supply
Filter Monitor
The thermostat counts the number of hours your system's filter has
been in use. To maximize your system's performance and energy
efficiency, change or clean your filter regularly.
When the total system run time for
heat and cool reaches 400 hours, the
Filter Change Indicator will flash as
a reminder to check your system's
filter.
After changing or cleaning the sys-
tem filter, press and hold the Filter
key for 3 seconds. The display will
blink, and the counter will be reset to zero.
Note: Pressing the Filter key at any time for less than 3 seconds will
cause the Filter Change Indicator to appear on the LCD. This is only
to confirm key operation, and the counter is not affected unless
the key is held for greater than 3 seconds.
SPAN Setting
Your thermostat is set at the factory to cycle at 1°F (0.5°C) above
and below the set temperature. (Span = 2) This setting has been
designed to provide a comfortable room temperature under most
all conditions. However, if you find your system cycling too fast or
too slow, then the Span can be adjusted to modify the cycle time.
The Span settings remain the same for both HEAT and COOL, and
can be changed in any System Switch position.
When batteries are installed in the thermostat, or the Reset key is
Fan Option
pressed, the Span is reset back to setting 2.
(SW3)
The System Selector switch on the front of the
thermostat determines the operating mode of
the thermostat. You may select COOL, OFF,
HEAT.
NOTE: Anytime you install or remove the ther-
mostat from the wallplate, slide the System Se-
lector to the OFF position to prevent the possi-
bility of a rapid system On-Off.
The Fan switch should normally be located in
the AUTO position. 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. For electric heat and air conditioning op-
eration, the Fan will turn on with the system.
To run the Fan on continuously, slide the Fan
switch to the ON position.
• Press either the up or down key and hold
for longer than 1 second.
• The display
will flash to
show that
you are in
Set Tem-
p e r a t u r e
mode, then
you can re-
lease the key.
• Press either up or down again to change to
your desired Set Temperature. Hold the key
down for over 2 seconds to fast-advance
the Set Temperature.
The display will return to the normal room tem-
perature after the keys have been released for
3 seconds.
• Press and hold BOTH for three seconds. The
display will flash, and SPAN will be displayed
on the LCD.
• Press to raise the Span to 3. This setting
INCREASES the cycle time by allowing your
system to run LONGER.
• Press to lower the Span to 1. This setting
DECREASES the cycle time by causing your
system to run SHORTER.
Low Battery Warning
Your thermostat has a two-stage low
battery warning system. When the
batteries are first detected to be
weak, the first stage low battery
warning is indicated by battery sym-
bol flashing on the LCD display. At
your earliest convenience, you need
to replace the batteries with 2 new AA alkaline batteries.
When the batteries become too weak for normal operation, the
thermostat enters the second stage low battery warning which shuts
down the thermostat. In this condi-
tion, "BATT" flashes alone on the
display, and the thermostat will turn
your system Off. Your system will
remain shut-off until the batteries
are replaced.
Note: The thermostat will still keep
the current Set Temperature and Fil-
ter run time in memory until new batteries are installed. After con-
firming that new batteries have been inserted, the thermostat will
return to normal operation.
Error Mode
If the thermostat is unable to con-
trol your system due to an unex-
pected battery problem, the thermo-
stat will enter Error Mode. In this
condition, the thermostat flashes
"Er" on the LCD display, and shuts
off your system.
To correct this problem, replace the batteries with 2 new AA alka-
line batteries, even if you have recently replaced them. Next, use a
paper clip to press the RESET button next to the keypad. You will
need to reprogram your thermostat and confirm normal opera-
tion.
If Error Mode returns, please call Technical Support at 1-888-830-
1326 for further information.
Auto Cut Off
Your thermostat will automatically cutoff in Heat mode if the room
temperature rises above 95°F (35°C). It will cutoff in Cool mode if
the room temperature drops below 45°F (7°C).
Note that if your system has malfunctioned and no longer responds
to thermostat controls, the Auto Cut-Off will have no effect.

TROUBLESHOOTING

Problem Solution
No Display. 1. Check battery connections and
batteries.
2. Press RESET button with a small pin
and hold in for two seconds.
Entire Display 1. Replace Batteries.
Dims.
Auto Fan Does Not 1. Move HG/HE selector to correct
Turn On Properly. position.
Heating or Cooling 1. Check that the function switch is in
Does Not Go On the correct position ("HEAT" or
or Off. "COOL").
2. There may be as much as 4-minute
delay before the system turns On -
wait and check. (Compressor
protection delay.)
3. Check your circuit breakers and
switches to ensure there is power to
the system.
4. Replace batteries.
5. Make sure your furnace blower door
is closed properly.
6. If your system only uses 4-wires, be
sure the jumper wire is installed
between the Rc and Rh terminals.
Erratic Display. 1. Press the reset button once with a
small pin and hold for two seconds.
Then reprogram.
If unit continues to 1. Replace unit.
operate in the Off
position.
Thermostat perma- 1. Replace unit.
nently reads "HI",
"LO", or "Er".
If you experience any other problems, call 1-888-830-1326 from 8
AM to 5 PM Central Time for technical assistance.
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