Comfort Stat CP1717 User Manual

Digital Thermostat

Owners Manual

Mode:CP1717

Your new 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 the product!
Please read this manual for complete instructions on installing and

operating your thermostat. If you require further assistance, please feel
free to contact us.

IMPORTANT INFORMATION

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

y Gas – Standing Pilot y Oil – Fired Furnace
y Gas – Electronic Ignition y Single Stage Heat Pumps – with no
y Gas – Fired Boilers auxiliary heat
y Gas – Millivolt Systems y Electric Furnace
y Oil – Fired Boilers y Electric Air Conditioning

This thermostat will NOT control multistage heat pumps or 110/220V
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 4 minute del ay afte r shutti ng off the compressor
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 approx imately 1 minute to chan ge the batter ies
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: The backlight will not function when the thermostat is in low battery
condition.

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

Structure of thermostat and explanation for the keypads

Filt

er Change

Ind

icator:Flashes

wh

en filter needs

to

be checked.

Sy

stem
Sw
Se

lector
swi
Heat,Cool,
and Off.

an Switch:

F

an switch

F

r Automatic

fo

ontinuous

or C

an operation.

f

itch:
tch for

LCD Display:
Shows Room
Temperature,Set
Temperature,and
other feature
information as
required.

Light:Backlight
display

automatically
with each key
press for easy
viewing.

SYSTEM

COOL

OFF

HEAT

Low Battery
Indicator:
Flashes when
batteries need
to be replaced.

FAN

AUTO

ON

Front Door:
Battery cover
Open with one
finger from top.

Filter Key:
Resets the
filter change
counter to zero.

Up and Down Keys:
Keys for changing
the Temperature
setting. Also used
for adjusting the
Span.

Battery
Compartment:
Front access allows
easy insertion of
two AA 1.5V
batteries.

Front Door:
Cover keys Open with
one finger from left or right.

OPERATION

Start-up

The LCD will show the factory default
display of 70˚F (21˚C) when batteries are
first installed,. The temperature will update
after a few seconds.

System Selector Switch

system

cool

heat

off

NOTE: Anytime you install or remove the thermostat from the wallplate,
slide the System Selector to the OFF position to prevent the possibility of a
rapid system On – OFF.

The System Selector switch on the front of the
thermostat determines the operating mode of the
thermostat. You may select COOL, OFF, HEAT.

Fan Switch

fan

auto

on

warm-up delay. For electric heat, air conditionin g, an d hea t pump oper ati on,
the Fan will turn on with the system.

To run the Fan on continuously, slide the Fan switch to the ON position.

The Fan switch should normally be locate d in the A UT O
position. The Fan will be turned on along with normal
operation of your system. In a norm al gas or oil furn ace,
the Fan will be turned on by your furnace after its

Review Current Set Temperature

y Press either the up or down key once to see the Set Temperature.
The factory default is 68˚F (20˚C) when started with the System Switch Off

or Heat, and 78˚F (26˚C) when started with the System Switch on Cool.

Setting New Temperature

y Press either the up or down once and
display the set temperature.

y 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 temperature after the keys have

been released for 5 seconds.

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 system 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 Indicat or to appear on the LCD. This is only to confirm
key operation, and the counte r 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 2˚F (1˚C) above and below
the set temperature. (Span = 2) This setting has been designed to provid e
a comfortable room temperature under most all conditions. However, if you
find your system cycling t oo f ast or t oo slow, then the Span can be adju sted
to modify the cycle time.

y Press and hold BOTH up and down keys for three

seconds. SPAN will be displayed on the LCD.

y Press up to raise the Span to 3. This setting

INCREASES to cycle time by allowing your system
to run LONGER.

y Press down to lower the Span to 1. This setting

DECREASES the cycle time by causing your
system to run SHORTER.

The Span settings remain the same for both HEAT and COOL, and can be
changed in any System Switc h position.

When batteries are installed in the thermostat, the Span is reset back to
setting 2.

Backlighting

Your thermostat has an electroluminesc en t lamp that backlights the display
for easy viewing in the dark.

When any key is pressed, the display is illuminated.
The display will remain illuminated for 7 seconds after the last key is

pressed. This allows the light to stay on if you need to operate several
keys.

Note: If the thermostat is in Low Battery warning condition, the backlight

will not operate. Replace with 2 new AA alkaline bat teries to restore the

Backlight function.

Low Battery Warning

Your thermostat has a two-stage lower battery
warning system. When the batteries are first
detected to be weak, the first stage low battery
warning is indicated by battery symbol 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 week for normal operation, the thermostat enters
the second stage low battery warning which shuts down the
thermostat. In this condition, battery symbol 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 Filter
run time in memory until new batteries are installed. After confirming that
new batteries have been inserted, the thermostat will return to normal
operating .

Error Mode

If the thermostat is unable to control your system due to an unexpected
battery problem, the thermostat will enter
Error Mode. In this condi tion, the thermostat
flashes “E1”or “E2” on the LCD display, and
shuts off your system.

To correct this problem, rep lace the batteries
with 2 new AA alkaline batteries, even if you
have recently replaced them. Next, Move the
battery out hold any key then pla ce the bat tery
again. You will need to reprogram your
thermostat and confirm normal operation. If
Error Mode returns, please call us 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.

Mechanical Heat Backup

This thermostat includes a bimetal switch that will automatically turn on the
Heat when the temperature reaches about 41˚F (5˚C).WARNING: This
switch only activates the Heating terminal (W). The system itself must be
capable of automatically turnin g th e F an O n. Without normal Fan operation,
severe damage to the heating system could result.

INSTALLATION

What You Need

This thermostat includes two #8 slotted screws and two wall anchors for
mounting. To install your thermostat, you should have the following tools
and materials.

y Slotted Screwdriver(s)
y Small Philips screwdriver
y Hammer
y Electric drill and 3/16” bit
y Two 1.5V (AA) size alkaline batteries (included)

Remove Old Thermostat

CAUTION: Do not remove any wiring from existing thermosta t before
reading the instructions carefully. Wires must be labeled prior to
removal.
INPORTANT! Turn off the power to the furnace at the main power
panel or at the furnace.

Remove existing thermostat cover and thermostat. 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 wallplat e. Ag ain, look for scr ews, t abs,
etc. Some models have doors that open to expose wires and mounting
screws. See Figure 1.

Typical Home Thermostats

Wall mounting Plate Thermostat Cover

Wall mounting Plate Thermostat Cover

Figure 1

Wiring Labeling

y Each wire coming from the wa ll to the existing thermostat is c onnected to
a terminal point on that thermostat. Each of these terminal points is usually
marked with a code latter as shown in Table A below.
y Note that this thermostat has multiple function terminals that allow
Single-Stage Heat Pump capability. Standard systems use: Rh, Rc, G, Y, W.
[Single-Stage Heat Pumps use: R, Y, G, and O or B.] Table A below shows

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 eith er of t he wi res to the R H t erminal , t hen
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
TAB LE A BELOW. (For example, attach the label marked W to the w ire t hat
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

RH,R,V R or 4
24 Volt

- or­B
Reversing Valve operating in Heat mode.
(Single Stage Heat Pumps ONL Y.)

RC,VC
24 Volt Cool

- or­O
Reversing Valve operating in Cool mode.
(Single Stage Heat Pumps ONL Y.)

G or F
Fan

Y,Y1,C or M
Air Conditioning Compressor

- or­Single Stage Heat Pump

Compressor

B

/

h

R

O

/

c

R

G

Y

Rh/B

Rc/O

G

Y

W or H
Heating

R
24 Volt
(Single Stage Heat Pumps ONL Y.)

W

R

W

R

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. Inse rt

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

NOTE: 5- Wire Systems

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

Rc

/

B

W

Y

R

h

/

O

G

Figure 3

R

then leave the jumper wire between the Rh and Rc terminals on the
wallplate. Otherwise, if you hav e s ep ar ate Rh and Rc w ires ( 5-w ire sy stem),
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 sy stem or the rmos tat.
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 t he 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

Wallplate
Terminals

R

Fan
Relay

Wallplate
Terminals

R

Fan
Relay

Wallplate
Terminals

R

24V
Supply

Fan
Relay

Wallplate
Terminals

R

Wallplate
Terminals

R

Fan
Relay

Wallplate
Terminals

R

4-Wire Heat/Cool System

Jumper

G

W

Heat Relay
or Valve

G

W

Heat Relay
or Valve

Single-Stage Heat Pump System

Jumper

G

W

Compressor
Contactor

G

W

Heat Relay
or Valve

G

W

Heat Relay
or Valve

G

W

Fan
Relay

Rh/B

Y

Cool

Heat/Cool

Contactor

24V Supply

5-Wire/Heat Cool System

No Jumper

Rh/B

Y

Heat 24V

Cool
Contactor

Supply

Rh/B

Y

Heat

OR

Mode

Reversing

Valve

2-Wire Heat Only System

Jumper

Rh/B

Y

Heat 24V or
Millivolt Supply

3-Wire Heat Only System

Jumper

Rh/B

Y

Heat 24V
Supply

3-Wire Cool Only System

Jumper

Rh/B

Y

Cool
Contactor

System

Rc/O

Rc/O

Rc/O

Rc/O

Rc/O

Rc/O

Cool 24V
Supply

Selector

System
Selector

Cool 24V
Supply

System
Selector

Cool
Mode

Connect to proper Reversing Valve
Terminals. See Table A

System
Selector

System
Selector

System
Selector

STD
HP

STD
HP

STD
HP

STD
HP

STD
HP

STD
HP

X-No Connection

Selector Switches

In order for this thermost a t to c ontrol your system, the system ty pe 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 a nd most ot her 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 tha t uses gas, oil, electric, or hot wat er
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)
Y our thermo sta t 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.

Temperature
Display

JP2

1234

FAHRENHEIT CENTIGRADE

System
Selector

STD

HP

K3

Fan Option

HG

K5

HE

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.

Auto Fan Does Not
Turn On Properly.

Heating or Cooling
Does Not Go On or
Off.

Erratic Display 1. Move the battery out hold any key then place

If unit continues to
operate in the Off
position.
Thermostat
permanently reads
“HI”, “LO”, or “Er”.

If you experience any other problems, call us for technical assistance.

The service number is 1-866-591-9898

1. Replace Batteries.

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 furna ce 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.

8. If you have single-stage hea t pump, be sure

the jumper wire is installed between t he Y and
W terminals.

the battery again. Then reprogram.

1. Replace unit.

1. Replace unit.