Honeywell Home CT30, CT33, CT31 Owner's Manual
CT30 Series
M37781
69-2338EFS-04
Low-Voltage Thermostat
Getting started
Owner’s Manual
English: Page 1
Mode d’emploi
Français : Page 6
Manual de Uso
Español: Página 11
Check package contents:
• Thermostat
• Coverplate
• Wall anchors & screws (2 each)
• Caution card
• Wire labels
Remove your old thermostat
TURN OFF POWER at heating/cooling system (or fuse/circuit-breaker panel).
Remove cover and thermostat, but leave wallplate with wires attached.
Leave wallplate in place.
Old thermostat
Cover
Before you begin, make sure you have:
• No. 2 Phillips & small pocket screwdrivers
• Hammer
• Level (optional)
• Pencil
• Drill and bit (3/16” for drywall, 7/32” for
plaster)
Is there a sealed tube containing mercury?
If so, see mercury notice below.
MERCURY NOTICE
If your old thermostat contains
mercury, contact your local waste
management authority for proper
disposal instructions.
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Label wires and remove old wallplate
Use a screwdriver to disconnect wires one by one. As you disconnect each wire, wrap it with
the label matching the letter on your old thermostat. (Adhesive labels are supplied in your
thermostat package.)
Remove the old wallplate only after all wires are labeled. Be careful not to let loose wires fall into
the wall opening.
Wrap supplied labels securely around each wire. Do not let wires fall into wall opening!
IGNORE WIRE COLORS: Use only letter
designations to identify wire types.
For CT30/CT33: If your old
thermostat has 3 or more wires
(not counting terminals C or C1),
you may have purchased the wrong
replacement thermostat. Stop
now and call 18004681502 for
advice.
Mark mounting position
CT30/CT33 CT31
For CT31: If your old thermostat
has 5 or more wires (not counting
terminals C or C1), you may have
purchased the wrong replacement
thermostat. Stop now and call
18004681502 for advice.
1. Pull wires
through base
(CT31 only).
2. Level base if
desired.
3. Mark positions
of both screw
holes.
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English: Page 1 • Français : Page 6 • Español: Página 11
M29583
M29582
Mount thermostat base - CT30/CT33
1. Drill holes at pencil-marked
locations (3/16” holes for
drywall, 7/32” holes for
plaster).
2. Use hammer to tap anchors
into holes until flush with wall.
3. Optional: Pull wires through
cover plate (if needed to cover
marks left by your old thermostat).
4. Connect wires first (see page
4), then insert screws. Check
level if desired, then tighten
screws.
Optional cover plate
Mount thermostat base - CT31
1. Drill holes at pencil-marked
locations (3/16” holes for
drywall, 7/32” holes for
plaster).
2. Use hammer to tap anchors
into holes until flush with wall.
3. Optional: Pull wires through
cover plate (if needed to cover
marks left by your old thermostat).
4. Pull wires through thermostat
base and insert screws.
Check level if desired, then
tighten screws.
Optional cover plate
Thermostat base
Thermostat base
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CT30 Series • Owner's Manual
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Connect wires
1. Match each labeled wire with same letter on terminal.
2. Use a screwdriver to loosen screw terminals, insert
bare wires beneath screws, then tighten screws.
3. Push any excess wire back into the wall opening.
Labels don't match?
If labels do not match letters on thermostat, see table below.
Connect to
Existing wires CT30/CT33 CT31
R • RH • 5 • V Terminal “R” Terminal “R”
W • W1 • H Terminal “W” Terminal “W”
Y • Y1 • M [1] Terminal “Y"
G • F [1] Terminal “G”
Rc [1] [1]
[1] If this wire is present, you may have purchased the
wrong thermostat. Call 18004681502 for help.
CT33 model is for 750 MV heat only
Set adjustment lever (CT30/CT31 only)
1. Separate cover from thermostat, and remove the insert.
2. Use a pencil to move the adjustment lever to the proper setting
for your system (see table below).
Your system Setting
Gas or oil furnace (less than 90% efficiency) 0.4
Electric furnace (any type) 0.3
High efficiency furnace (more than 90% efficiency) 0.8
Hot water system 0.8
Gas/oil steam or gravity system 1.2
CT30/CT33
CT31
Finish installation
69-2338EFS—04 4
1. Mount thermostat on base and tighten
three mounting screws (CT31 only).
2. Align the 3 tabs on the cover with slots on
the thermostat, then push gently until the
cover snaps into place.
3. Restore power at the heating/cooling
system, or at the fuse/circuit-breaker
panel.
Operation
English: Page 1 • Français : Page 6 • Español: Página 11
System off (select models)
Move lever to far left to turn off heating
system.
Fan switch (CT31)
• Auto: Fan runs only when heating
or cooling system is on.
• On: Fan runs continuously.
Temperature setting
Adjust to set desired indoor temperature.
M29588A
System switch (CT31)
• Cool: Controls the cooling system.
• Heat: Controls the heating system.
• Off: All systems are off.
CAUTION: EQUIPMENT DAMAGE HAZARD (CT 31).
Do not operate cooling system when outdoor temperature is below 50°F (10°C).
1-year limited warranty
Resideo warrants this product, excluding battery, to be free
from defects in workmanship or materials, under normal use
and service, for a period of one (1) year from the date of first
purchase by the original purchaser. If at any time during the
warranty period the product is determined to be defective due
to workmanship or materials, Resideo shall repair or replace it
(at Resideo’s option).
If the product is defective,
(i) return it, with a bill of sale or other dated proof of purchase,
to the place from which you purchased it; or
(ii) call Resideo Customer Care at 18004681502. Customer Care will make the determination whether the product
should be returned to the following address: Resideo Return
Goods, 1985 Douglas Dr. N., Golden Valley, MN 55422, or
whether a replacement product can be sent to you.
This warranty does not cover removal or reinstallation costs.
This warranty shall not apply if it is shown by Resideo that
the defect was caused by damage which occurred while the
product was in the possession of a consumer.
Resideo’s sole responsibility shall be to repair or replace the
product within the terms stated above. RESIDEO SHALL NOT
BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND, IN
CLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES
5 69-2338EFS—04
RESULTING, DIRECTLY OR INDIRECTLY, FROM ANY BREACH
OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER
FAILURE OF THIS PRODUCT.
Some states do not allow the exclusion or limitation of
incidental or consequential damages, so this limitation may
not apply to you.
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY
RESIDEO MAKES ON THIS PRODUCT. THE DURATION OF
ANY IMPLIED WARRANTIES, INCLUDING THE WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, IS HEREBY LIMITED TO THE ONE YEAR DURA
TION OF THIS WARRANTY. Some states do not allow limitations on how long an implied warranty lasts, so the above
limitation may not apply to you.
This warranty gives you specific legal rights, and you may
have other rights which vary from state to state. If you have
any questions concerning this warranty, please write Resideo
Customer Care, 1985 Douglas Dr, Golden Valley, MN 55422
or call 18004681502.
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