Table a, Figure 2, Note: 5- wire systems – Comfort Stat CP1818 User Manual

Page 2: Ndo not connect a “common” wire (sometimes, Troubleshoo, Ting

system.

y The number of wires in your system can be as few as two (for heat only

inal marking on the existing thermostat of two wire,

PLY THE

ling wires, disconnect them from the existing thermostat.

wall

res, seal this hole with

If the code letter on

then

e wire

and connect to

OTE:

ount wallplate and Thermostat

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 term

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, AP

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 labe

y Remove existing wallplate. To make sure wires do not fall back into

opening, you may want to tape them to the wall.

y If hole in wall is larger than necessary for wi

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

your existing

Thermostat is

mark th

with label shown

ermostat termina

shown

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.

at by pressing the release tab

y Position wallplate on wall and

g wires through large opening.

ntil flush

wallplate to wall, pulling wires through large opening. Insert

e 3

NOTE: 5- Wire Systems

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

ire between the Rh and Rc terminals on the

y Remove the wallplate from your thermost

on the bottom of the thermostat. See Figure 2.

Figure 2

pull existin

Then level for appearance. Mark holes for plastic anchors 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 u

with wall.

Reposition

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

Figur

then leave the jumper w

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

ich may

efer to the Wiring Diagrams below to be sure your system is wired

rrectly.

the System Selector switch inside the thermostat to the Heat

stem or thermostat.

. Press the bottom of the thermostat body into the snap on the

screws on the wallplate. (See Figure 4, 5.) Ignore any wires wh

be present, but which were note connected to the old thermostat.

Figure 4 Figure 5

y R

y If your system is a single stage heat pump and uses an O or B wire, you

must move

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

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

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

tor switches on the printed circuit board inside the

“HG” position. Leave it in this

rner. If you have an electric

fan relay.

sition. Leave it in this

tric, or hot water

rmostat is set for F˚ mode from the factory. In order to change to C˚

key about 2 seconds without the

Figure 6

TROUBLESHOO

In order for this thermostat to control your system, the system type must be

specified by the selec

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

position if you have a gas furnace or an oil bu

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

y System Selector (STANDARD – HEAT PUMP switch)

The factory position for this switch is in the STD po

position if you have ANY system that uses gas, oil, elec

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 the

mode, slide the switch to C˚ and hold any

battery, then place the battery again.

NOTE: Unless press any key about 2 seconds without the battery, then

place the battery again.

TING

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.

or to correct position.

1. Move HG/HE select

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.)

Check your circuit breakers and switches to

ensure there is power to the system.

4. Replace batteries.

5. Ma

closed

ke sure your furnace blower door is

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.

. 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 a

W terminals.

Erratic Display

n. Then reprogram.

Move the battery out hold any key then place

the battery agai

If unit continues to

operate in the Off

position.

1. Replace unit.

Thermostat

permanently reads

1. Replace unit.

“HI”, “LO”,

“E1” , “E2”.

her problems, call us for technical assistance.

number is 1-866-591-9898

you experience any ot

he service

1 2 3 4

STD

JP2

R G W Y

AC24V

120V

AC24V

Rh/O

c/B