Honeywell CPFILA User manual

I
Honeywe I I
Heating, Air Conditioningor
Heating/Air Conditioning
Thermostats
INSTALLATION INSTRUCTIONS
The CT50A is for mostgasand oil
heating-onlysystems.
TheCTSOC is
for mostelectric
air condmoning-only systems.
The CTSlA is
for most gas, oil, or electric
healing/electric air conditioningsystems
The CT53A
is for millivoltage heating systems.
Do-it-yourself models
CT5OA,C; CT51A; CT53A CPfilA shown
YOUR
NEW
THERMOSTAT
Your new Honeywell CT50A
HeatingThermostat will replace
most 15to 30
V, 2-wireheating
systemthermostats. The CT50A
issuitable only
for gas or oil
heating systems (NOT
for air
conditioning, heating/air
conditioning, heat pumpor
electric heating systems).
Your new CT5OC Cooling
Thermostat will replacemost
15
to 30 V, 3-wireair conditioning
system thermostats (NOT
for
heating,heating/air conditioning
or heatpump systems).
Your new CT51A
Heating/Cooling Thermostat will
replacemost
15 to 30 V, 4-wire.
heating/coolingsystem
thermostats.The CT51A is
suitable
for gas,oil or electric
heating/electric air conditioning
systems (NOTfor heatpumps).
Your new CT53A Heating
Thermostat issuitable
for 250,
500 or 750 millivolt (mV) heating
systems only.
PREPAI
REMOL
WIRE A
TROUB
Proper installation of your
newthermostat will occur
if you follow instructionsSTEP-
BY-STEP.
It isrecommended
that as you read, understand and
complete each step, you check
it off with pencil or pen.
Check thermostat
suitability lor your home’s
system by reviewing
YOUR NEW
If you areunsureabout wiring
procedures, please call a
qualifiedservicetechnician for
assistance. THERMOSTAT section, above.
FLAT BLADE
SCREWDRIVER
HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT
WIRE CUTTER/STRIPPER
OR SHARP KNIFE
SPIRIT LEVEL OR PLUMB BOB AND LINE
11.95%
anddiscard the
under the cover.
Save package
of screws
and instruction pages.
anticipator adjustment Disconnect wires
from oldthermostat or
subbase.
If your thermostat
hasmore than
2 wires, as
you disconnect each wire,
tape the end and label it with
the letter of the terminal
designation to make
reconnectionto new
thermostat easier. Take care
that these wires do not fall
back into the wall opening.
Keepthe old
thermostat
for
reference purposes until
your new thermostat is
functioning smoothly.
WiRE AND
MOUNT
For CTSOA:
Connecteach
romthewall
to
either terminai onthe
back
of the thermostat.
Tighten
the screws.
For CT50C
or
Cf51 A:
Connectwires
from the wallto matching terminals on back of thermostat.
Tighten the screws.
NOTE:
If terminal designations on old thermostat do not match
those on newthermostat, refer
to chart below.
system, and callnot

Printed I
REMOVING OLD
THERMOSTAT
If you have an
electric furnace. you
need
to determine how your
fan is controlled Turn it on
and adjust your present
thermostat
so the heat
comes on, while observing
when the fan comes on If the fan comes
on immediately you need
to add the
jumper noted in section
4 between
terminals 1
& 2 If there isa noticeable
delay before the fan comes on, there
IS
no need to add the jumper because your
furnace controls the fan
0 heating/air conditioning system at
the main fuse panel
Most residential
systems have a separate switch box or
circuit breaker for disconnecting power
to thefurnace
Remove cover of oldthermostat-
0 cover normally snaps off when
pulled firmly from the bottom If it resists.
check for
a screw that locks the cover on
0 before removing the old
thermostat from the wall, look at
it
carefully to locate iheheat
Begin by turning off power
to the
-
For CT50A or CTSIA installation

4 WIRE AND MOUW .THERMOSTAT wntinued)
Recheck for level positioning,and firmly
tighten both mounting screws
If installingCTSOAor CT51A, makssure
CIyouAave the turf- {anticipator setting)
for your system. This isthe number you wrote
in
the box in step 3 If you were unable to find the
currentdraw for step
3. this informationcan be
found printedon the primary control at the
furnace. The primary control
is usually a gas
valve, zone valve, or a retay or burner control box
with thethermostat wires connectedto it. For
electric heat, you needto add the
:. n relay
current, usually
0 2 to 0.4 A.
ZONE VALVE
OIL
BURNER CONTROL
SHOWS
CURRENT DRAW
s LOW
AGE
TO
BURNER
NT DRAVI
TYPICAL GAS VALVE ii.iaic
On the CT50A or CT51A, set heat
anticipator indicatorat rating printedon
primary control.
Adjuslablt,
Hea'
Ari c
Set;[. I 1-
Press thethermostat cover firmly onto the
0 mounting clips
CHECK OUT THE
THERMOSTAT
To prevent possible com-
pressor damage, do not
operate air conditioning
if
outdoor temperature is
below
50" F [lo0 C]. Once
the air conditioner is
off,
do not turn it on for 5
minutes: this action will
prevent compressor
damage.
On the CT51A, the system
switch controlsas follows
HEAT-heating system only
operates.
OFF-heating and air condi-
tioning systems are dis-
connected
COOL-air conditioning sys-
tem only operates.
The fan switch controls as
follows:
AUTO-fan operates when
heating or air conditioning
system operates
WL I
ON-fa rates co
ousl
NOTE In the following instruc-
tion, disregard heating or air
applicable
to your syst
heating/air conditioning
system
Observe system operation
for at feast one cycle on
bothheatingandair conditioning.
To observe.
Place the system switch
0 at HEAT position and fan
switchat AUTO. Movethetemper-
ature setting laver
10" F [So C]
above room temperature. The
heating equipment should turn
on
A short warm-up period may
be required before the system
fan turns on.
Place system switch at
0 COOL position and move
temperature setting lever 10" F
[So C] below room temperature.
The arr conditioning equipment
should turn on and the system
fan should turn on.
NOTE Some systems have a time
delay that can prevent opera-
tion upto
5 minutes.
Turn thefan switch
to ON.
0 The system fan should turn
on, and operate continuously.
The system blower should con-
tinue
to operate at any system
switch or thermostat setting.
{MOSTAT
'ING
On CTSlA, place the sys-
tem and fan switches at
the desired settingsfor operation.
On all models, move the
temperature setting lever
to the desired temperature com-
fort level

I I
TROUBLESHOOTING
Your Honeywellthermostatrequireslittle or noattention.Mostproblemscan generally be tracedto the following:
NOTE:
If your system is heating-only or air conditioning-only, disregard sectionsnot applicabletoyour system.
SYMPTOM
No heat
-_____
Furnace turns on
and
off.
Major swings in
^_^^_^ 1.. ..^
PROBLEM
System switch at
OFF or
COOL Position.
Blown fuse or tripped
circuit breaker
Furnacepower switch
is
on QFF.
No pilot flame
Improperconnections to
thermostat.
Defective thermostat.
(Here’s how you tell:
Remove the thermostat
from the wall. Discon-
nect wire from
W ter-
minal. Touch
W wire to
R terminal. The thermo-
stat is detective
if the
burnercomeson.)
Other.
Burner
ON period is too
short,
Burner
ON period
:- *^^ ,---
SYMPTOM
Move switch to HEAT Thermostatsetting
position. and thermometer
reading disagree.
Replace fuse or reset
circuit breaker
Switchto
ON
_._ _-
CORRECTI~E Am
Relight pilot flame per
furnace manufacturer’s
instructions
With power to furnace
OFF, tighten all mounting
and terminal screws. Re-
pair frayed or broken
wires.
Exchange the thermostat
(seeWarranty). ing
No air Condltlon-
Contacta qualifiedservice
technicianfor assistance.
Remove the thermostat
cover and move the heat
anticipatorleverCOUNTER-
CLOCKWISE
n one
scale mark. Replace the
cover and wait several
hours for the system to
stabilize.
Remove the thermostat
^^..^_ ..-A -^..^ A&.^ LA-.
PROBLEM
Thermostat is not level.
Thermostat affected by
drafts or radiant heat.
Thermostat is out of cali-
bration.
Thermometer is out of
calibration
System switch in in OFF
or HEAT position.
Blown fuse or tripped
circuit breaker
Compressor switch
(lo-
cated outdoors)isturned
OFF
Improperconnections to
thermostat
--
Defectivethermostat.
(Here’s how you tell.
Remove the thermostat
from wall Disconnect
wire from
Y terminal
Touch
Y wire to terminal
R. The thermostat is de-
fective
if the compressor
CORRECTIVEACTION
Recheck the thermostat
position on wall. Use a
bubble level to make sure
it’s level. See step 4.
Contacta qualified service
technician to change the
location. The thermostat
should be about
5 ft [1.5
m] above the floor and on
an inside
wall.
Contacta qualified service
technician to recalibrate
thethermostat.
Recalibrate.See step
8.
Move siitc-hto cooi
position.
Replace fuse or reset
circuit breaker.
Move switch to ON posi-
tion.
With power to furnace
OFF, tighten all mounting
and terminal screws. Re-
pair broken wires.
Exchange the thermostat.
SeeWarranty.