Comfort Stat CP1717 - Manual (Page 2)

the multiple functions of the terminals. Use the terminals that match your
system.
y 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.
y 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.
y IMPORTANT! BEFORE DISCONNECTING ANY WIRES, APPLY THE
SELFADHESIVE LABELS PROVIDED TO THE WIRE AS SHOWN IN
TABLE A BELOW. (For example, attach the label marked W to the wire that
toes 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.
y After labeling wires, disconnect them from the existing thermostat.
y Remove existing wallplate. To make sure wires do not fall back into wall
opening, you may want to tape them to the wall.
y 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
If the code letter on
your existing
Thermostat is
then mark the wire
with label shown
and connect to
thermostat terminal
shown
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.
Mount wallplate and Thermostat
y Remove the wallplate from your thermostat by pressing the release tab
on the bottom of the thermostat. See Figure 2.
Figure 2
y 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.
y Drill holes with 3/16” bit and gently tap anchors into the holes until flush
with wall.
y 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
y 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 note connected to the old thermostat.
Figure 4 Figure 5
y Refer to the Wiring Diagrams below to be sure your system is wired
correctly.
y If your system is a single stage heat pump and uses an O or B wire, you
must move the System Selector switch inside the thermostat to the Heat
Pump position. If you have a normal furnace or electric system, leave the
switch in the Standard position. Refer to the System Selector section on the
back for more information on this switch.
y Be sure to tighten the terminal screws securely, otherwise a loose wire
could cause operational problems with your system or thermostat.
y Push excess wire back into the hole to prevent interference when
installing the thermostat to the wallplate.
y Make sure the System Switch is set to OFF, and the Fan Switch is set to
AUTO.
yInsert 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.)
y Insert the two AA size alkaline batteries, observing the polarity marked
inside the battery compartment.
y Switch on the main power at the panel or furnace.
Wiring Diagrams
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. See figure 6.
y 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 operation is normal, leave it in the “HG” position. If
the Fan does not come on within a minute of the thermostat calling for
heating, 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.
y System Selector (STANDARD – HEAT PUMP switch)
The factory position for this switch is in the STD position. Leave it in this
position if you have ANY system that uses gas, oil, electric, or hot water
heating. If you have a single-stage Heat Pump (no auxiliary or emergency
heat source), then slide the switch to the HP position. Be sure the reversing
valve wire is connected to the correct terminal for your heat pump (Rc/O) or
(Rh/B).
y 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 hold any key about 2 seconds without the
battery, then place the battery again .
NOTE: Unless press any key about 2 seconds without the battery, then
place the battery again.
Figure 6
TROUBLESHOOTING
Problem Solution
1. Check battery connections and batteries. No Display
2. Move the battery out and wait for about 1
minutes then Replace Batteries. .
Entire Display
Dims.
1. Replace Batteries.
Auto Fan Does Not
Turn On Properly.
1. Move HG/HE selector to correct position.
1. Check that the function switch is in the correct
position (“HEAT” or “COOL”).
2. There may be as much as 4-mintue 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 non-heat pump system only uses
4-wires, be sure the jumper wire is installed
between the Rh/B and Rc/O terminals.
7. Check the position of the Reversing Valve
selector switch: Standard or Heat Pump.
Heating or Cooling
Does Not Go On or
Off.
8. If you have single-stage heat pump, be sure
the jumper wire is installed between the Y and
W terminals.
Erratic Display 1. Move the battery out hold any key then place
the battery again. Then reprogram.
If unit continues to
operate in the Off
position.
1. Replace unit.
Thermostat
permanently reads
“HI”, “LO”, or “Er”.
1. Replace unit.
If you experience any other problems, call us for technical assistance.
The service number is 1-866-591-9898
12
3
4
Temperature
Display
System
Selector
STD HP
Fan Option
HG
HE
K3
JP2
FAHRENHEIT CENTIGRADE
K5
R G W Y Rh/B Rc/O
Wallplate
Terminals Jumper
Fan
Relay Heat Relay
or Valve Cool
Contactor Heat/Cool
24V Supply
System
Selector STD
HP
Fan
Relay Reversing
Valve
Compressor
Contactor
Wallplate
Terminals
R G W Y Rh/B Rc/O
System
Selector
HP
STD
Fan
Relay
R
Wallplate
Terminals
Heat 24V
Supply Cool
Contactor Heat Relay
or Valve Cool 24V
Supply
No Jumper
W G Rh/B Y Rc/O
System
Selector
HP
STD
Jumper
24V
Supply
Heat
Mode Cool
Mode OR
Heat 24V or
Millivolt Supply Heat Relay
or Valve
Wallplate
Terminals
R
Jumper
G W Y Rh/B Rc/O
System
Selector
HP
STD
Wallplate
Terminals
R
System
Selector
Heat 24V
Supply Heat Relay
or Valve
G W Y Rh/B Rc/O
Jumper
HP
STD
Fan
Relay
Fan
Relay
Wallplate
Terminals
R
Cool
Contactor Cool 24V
Supply
G W Y Rh/B Rc/O
System
Selector
HP
STD Jumper
4-Wire Heat/Cool System
5-Wire/Heat Cool System
Single-Stage Heat Pump System
2-Wire Heat Only System
3-Wire Heat Only System
3-Wire Cool Only System
Connect to proper Reversing Valve
Terminals. See Table A
R Rh/O
G Y
W Rc /B
RH,R,VR or 4
24 Volt
- or-
B
Reversing Valve operating in Heat mode.
(Single Stage Heat Pumps ONLY.)
Reversing Valve operating in Cool mode.
(Single Stage Heat Pumps ONLY.)
- or-
O
24 Volt Cool
RC,VC
G or F
Fan
Y,Y1,C or M
Air Conditioning Compressor
- or-
Single Stage Heat Pump
Compressor
W or H
Heating
R
24 Volt
(Single Stage Heat Pumps ONLY.)
Rh/
B
W
R
Y
G
Rc/
O
Rh/B
Rc/O
G
Y
W
R