Honeywell CT5OC - Manual

Honeywell
Heating, Air Conditioning or
Heating/Air Conditioning
Thermostats
INSTALLATION INSTRUCTIONS
The CT50A is for most ^as and oil
heating-on(y systems.
The CT50C is lor most electric
air conditio/irng-only systems.
The CT51A is lor most gas, oil, or electric
heating/electric air condillorring systems,
The CT53A is for milMvoltage heating systems,
DO'it-yourself models
CT50A,C; CT51A; CT53A
YOUR
NEW
THERMOSTAT to 30 V, 3'Wire air conditioning
system thermostats (NOT for
heating, heating/air conditioning
or heat pomp systems}.
CON
PREPAI
Your new Honeywell CT50A
Heating Thermostat will replace
most 15 to 30 V, 2-wire healing
system thermostats. The CT50A
is suitable only for gas or oil
heating systems (NOT lor air
conditioning, heating/air
conditioning, heat pump or
electric heating systems).
Your new CT 51A
Heating/Cooling Thermostat will
replace most 15 tg 30 Y, 4-wire,
heating/cooling system
thermostats. The CT51A is
suitable for gas, oil or electric
heating/electric air conditioning
systems (NOT for heat pumps}.
THERM
REMONi
WIRE A
CHECK
CT51A shown
Your new CT50C Cooling
Thermostat will replace most 15
Your new CT53A Heating
Thermostat is suitable for 250.
500 or 750 millivolt (mV) heating
systems only. THERM
TROUB
RECALI
If you are unsure about wiring
procedures, please calf a
qualified service technician for
assistance.
□ Chec)( thermostat
suitability for your home’s
system by reviewing YOUR NEW
THERMOSTAT section, above.
ID
Assemble tools required,
as shown left, r
PREPARATION
□ Proper installation of your
new thermostat will occur
if you follow instructions STEP-
BY-STEP. tt is recommended
that as you read, understand and
complete each step, you check
I ^ I it off with pencil or pen.
□ Make certairt that your
burner/air conditioner
(where applicable) áre working,
especially if they hâve been
inoperative for any length of
time. If either does rot work,
contact your local heating/air
conditioning dealer. Do NOT
operate the air conditioning
system if outdoor temperature is
below 30® F [10° C],
□ Carefully unpack your
new thermostat. Remove
and discard the packing insert
under the cover.
THER
, . FE
X—
Ш
га
□
SPIPIT LEVEL OR PLUMB BOB AUO LINE
Save package ol screws
and instruction pages.
anticipator adjustment
mechanism, (See last
i illustration tinder step 4 to
'i help you recognize the heat
ahticipator.) Make a note
i here 1 [ of that
anticipator setting for future
reference. The heat
anticipator pointer, if
adjustable, will be set at one
ota series of numbers
representing the (electrical)
, current rating of the pritnary
! control of your system In
amps. The number will range
from 0,1ft to 1,0. If no heat
antidi pato r/ i n dr cat
¡0 n (s
,i showing, do hot be
cortcerried; move on to the
next step.
□ Disconnect wires
from old thermostat or
subbase. If your therrnostat
has more than 2 wires, as
you disconnect each wire,
tape the end and label it with
the letter of the terminal
designation to make
reconnection to new
thermostat easier. Take care
that these wires do not fall
back into the wall opening.
from the wall to matching terminals on back of thermostat.
Tighten the screws,
NOTE: If terminal designations on old thermostat do not match
those on new thermostat, refer to chart below.
WIRE AND
MOUNT
THERMOSTAT
Loosen screws
I ■ holding thermostat
¡ báselo Buitoase qr wall, and
Lliftaway,........j.". ■
□ Keep the old
thermostat for
reference purposes until
i your new thermostat is
functioning smoothly.
□ For CT50A:
Connect each
wire from the wall to
either terminal on the
back of the thermostat.
Tighten the screws.
□ For CT60C or
CT51A:
Connect wires
OLD THERMOSTAT
TERMINAL MARKED FUNCTION
NEW THERMOSTAT
TERMINAL MARKED
e or F Fan G
YorC Cooling Y
! Wor H Heati ng W
HC, V, VC or В Power You have a 5-wire
system, and cannot
use this thermostat;
we recommend a
CT87B instead.
1 HH. M, VR, 4. A or R :i, Power R
i'flitriing CT51A for ELECTRIC furni
need to instali a jumper between t
and 2: If your old subbaSe ts a Q5v
: Q634G, you need the jumper. If in
I base number, see section 3. If jurr
i not installed, the furnace could 6v
; hazard. Use T ft gauge insulated
I installing, :
ace systems, you may
herrrrostat termirials J;;
9G, Q539U,: Q634D or '
dbUbt аЬо1й cfld siib-
ipef is needed and is
érhéat; саиШд a firè::
fire; strip ends before.