Radio Thermostat CT32 User manual

Install Guide CT32
Caution
• Your thermostat is a precise instrument, handle it with care.
• Turn off electricity to the HVAC system before installing or
servicing thermostat or any part of the system.
• Do not turn electricity back on until work is completed.
• Do not short (jumper) across electric terminals at the control
on the furnace or air conditioner to test the system. This may
damage the thermostat.
• All wiring must conform to local codes and ordinances.
• This thermostat is designed for use with 24 volt AC HVAC
and millivolt gas systems. The thermostat is powered by 4AA
alkaline batteries and/or 24 volt AC C wire (or a 12-24 AC or
DC source). Each thermostat relay load should be limited to 1.0
amp; higher amperage may cause damage to the thermostat.
Caution
To avoid electrical shock and
to prevent damage to the furnace, air conditioner, and
thermostat, disconnect the power supply before
beginning work. This can be done at the circuit breaker.
Save
Energy
button
Power Grid
status
indicator
top cover
Touch screen
Wire
terminal
Mode
button
MENU
button
Reset
HVAC
selections
switches
bottom
cover
1202-003-006
INSTALLATION
ENGLISH

PG 2
REMOVE OLD UNIT
Switch OFF electricity to the HEATING and COOLING systems.
Then follow these steps:
• Remove cover from old thermostat. Most are snap-on types and simply pull off. Some have locking screws
on the side or front. These must be loosened. DO NOT remove wires. Note the letters printed near the
terminals. Attach labels (enclosed) to each wire for identication.
Caution
Read instructions carefully before removing any wiring from
existing thermostat. Wires must be labeled before they are
removed. THERE IS NO STANDARD COLOR CODE. When remov-
ing wires from their terminals, ignore the color of the wires and
LABEL THEM by the lettered terminal where they were screwed.
• Label the wires one at a time. You must label all the wires before
you proceed.
• With all wires labeled, remove them from the old unit.
• Make sure the wires do not fall back inside the wall. You can wind
them around a pencil to keep them from falling.
• Loosen all screws on the old thermostat and remove it from the
wall.
TOOLS
You will need a small Phillips screwdriver and a drill with 3/16-in. (4.8mm) bit for wall mounts.
LOCATION
Replacement installations - mount the CT32 in place of the old thermostat.
A new location will require moving your wiring.
For new installations and relocating the CT32 - follow the guidelines listed below:
• Locate the thermostat on an inside wall, about 5 ft. (1.5m) above the oor, and in a room that
is used often.
• Do not install it where there are unusual heating conditions, such as: in direct sunlight; near
a lamp, radio, television, radiator register, replace; near hot water pipes in a wall; or near a
stove on the other side of a wall.
• Do not locate in unusual cooling conditions, such as: on a wall
separating an unheated room; or in a draft from a stairwell, door,
or window.
• Do not locate in a damp area. This can lead to corrosion that will
shorten thermostat life.
• Do not locate where air circulation is poor, such as: in a corner, an
alcove; behind an open door.
• Do not install the CT32 until all construction and painting has
been completed.
• This thermostat does not require leveling.
Good
5ft.
(1.5m)

PG 3
REMOVE OLD UNIT
Switch OFF electricity to the HEATING and COOLING systems.
Then follow these steps:
• Remove cover from old thermostat. Most are snap-on types and simply pull off. Some have locking screws
on the side or front. These must be loosened. DO NOT remove wires. Note the letters printed near the
terminals. Attach labels (enclosed) to each wire for identication.
Caution
Read instructions carefully before removing any wiring from
existing thermostat. Wires must be labeled before they are
removed. THERE IS NO STANDARD COLOR CODE. When remov-
ing wires from their terminals, ignore the color of the wires and
LABEL THEM by the lettered terminal where they were screwed.
• Label the wires one at a time. You must label all the wires before
you proceed.
• With all wires labeled, remove them from the old unit.
• Make sure the wires do not fall back inside the wall. You can wind
them around a pencil to keep them from falling.
• Loosen all screws on the old thermostat and remove it from the
wall.
R
G
W

PG 4
What wires do you have? Make sure your wires are labeled. This may require you to nd the ‘other
end’ connection for each wire on your heating or air conditioning equipment and read the label there. Refer to
the Wire Reference page at end of install section for better understanding of wire labels from different HVAC
system makers.
IMPORTANT: The CT32 runs on 4 AA alkaline batteries and/or the C wire if
available. If you do not have a C wire you can run a new wire from the HVAC or
use a standard 12-24V [AC or DC] wall transformer. A constant power source is
required when using a radio module.
IMPORTANT: If you have both RH and RC you need to remove the jumper wire between these 2 terminals.
Prepare Wires
Please follow these guidelines for safe and secure wire connections:
• You will need at least 2.6” of wire for each of your connections to the CT32.
• If you do not have enough wire, splice additional wire to allow enough slack.
• Terminals accept wires from 16-22awg.
• Fan out wires below the hole as shown.
• Remove insulation 1/8” from the tip of each wire.
• When handling, take care not to damage the labels for each wire.
Caution
Do not allow wires to touch each other or parts on thermostat.
Jumper
wire
Y
RH RC
G A
Y2
Wire Terminals

PG 5
Find the step-by-step diagram for your system
• Select the reference page
with your wiring diagram and
set-up information below.
• The C-wire is optional but
preferred for Z-Wave and
ZigBee radio installations. It is
required for Wi-Fi installation.
Without a C-Wire the CT-32
will operate on batteries only
for about one year.
• Hot Water systems
accessories are on Page 18.
• If your combination of wires
is not above you can use the
wiring table at the end if the
install section to determine
your connections, contact
customer support for help.
G
C W Y RH RC G
6 Wire
Heat/Cool
From
HVAC
RC
CYRH
W
C W Y R G
5 Wire
Heat/Cool
From
HVAC
G
C
YR
W
C W R G
4 Wire
Heat
From
HVAC
CRG
W
From
HVAC
C
W
C W R
R
3 Wire
Heat
WIRES
WIRES WIRES
WIRES
G
R
C Wn Yn R G
Multi-stage Cool
Multi-Stage Heat
From
HVAC
Y
n
C
W
n
C B or
O AUX n Yn R G
Multi-stage
Heat Pump
w/
Multi-stage
Aux Heat
From
HVAC
R
CO
or
Wn
B
G
Yn
G
C B or O Y R G
5 Wire Heat Pump
w/o Aux Heat
From
HVAC
R
CO
or
Y
B
WIRES
WIRES
WIRES
Go To Page 15 Go To Page 16 Go To Page 15
Go To Page 13 Go To Page 14 Go To Page 14
Go To Page 13

PG 6
Mount the CT32 to Wall
1. Hold the CT32 against the wall, with the wires coming over the top;
above terminal block. The CT32 will cover the hole in the wall.
2. Position CT32 for best
appearance.
3. Attach the CT32 to
the wall with the screws
provided.
4. If you are mounting the
CT32 to sheet rock or if you
are using the old mounting
holes, use the plastic
anchors provided.
5. Mark rst and drill a
3/16-in.(4.8mm) hole for
the insert at each screw
location, then mount the
unit.
• “Fan out” wires as illustrated with CT32 below the wall opening. As
in the example: fan out the wires so that the C wire is above the C
terminal, the W above the W. This allows the CT32 to t snug to the wall.
• Position the Wires behind the CT32 and up over the terminal area.
• Do not bunch wires behind the CT32. Feed any slack back into the
wall opening.
Connect Your Wires
• Connect labeled wires only to a terminal with the same letter label.
• Insert the wire in the terminal well and tighten the screw securely.
NOTE: If you wish you can mount the CT32 to the wall rst, and then
connect the wires.
• The CT32 can be externally powered with a power source rated from
12V to 24V, AC or DC, at 100ma or greater. If used, connect to the C
and RH terminals (no polarity).
from HEAT/COOL system
CBOW
W2
Y
Y2 RHRC
GA
Y
G
W
C
RH
G
CYRH
W
2.6"
from HVAC
System

PG 7
Mount the CT32 to Wall
1. Hold the CT32 against the wall, with the wires coming over the top;
above terminal block. The CT32 will cover the hole in the wall.
2. Position CT32 for best
appearance.
3. Attach the CT32 to
the wall with the screws
provided.
4. If you are mounting the
CT32 to sheet rock or if you
are using the old mounting
holes, use the plastic
anchors provided.
5. Mark rst and drill a
3/16-in.(4.8mm) hole for
the insert at each screw
location, then mount the
unit.
CT32
Wall
Wires
Wall
anchor
Place wires inside cover
Screw to wall

PG 8
Caution
Special Thermostat Battery Cautions
Always replace the batteries as soon as the “Low Batt” ashes. The thermostat is a battery powered device.
You must be responsible to replace batteries before they run out. Failure to replace batteries can result in
overheating or excessive cooling of your house.
• Even if the “Low Batt” indicator does not ash, you should always replace the batteries at least once a year.
Replacing the batteries also helps to prevent leakage that can corrode and damage the thermostat.
• If you are leaving your home for a month or more, you should replace the batteries as a precaution against
battery failure in your absence.
• Always use new alkaline batteries.
• Failing to replace the batteries, when necessary, could cause the thermostat to lose power or malfunction. If
the thermostat loses power, then the thermostat will not control the temperature which could result in your HVAC
system not functioning as you intended and lead to possible damage from overheating or excessive cooling.
• If the thermostat batteries fail with the heat OFF, this can result in NO HEAT and possible frozen or broken
pipes and water damage.
• If the thermostat batteries fail with the cool OFF, this can
result in NO COOL and could cause possible damage or
excessive temperatures.
HVAC Selection
• Set the HVAC TYPE switch in the NORM position if you have normal natural gas,
propane, oil, or electric heat. If you have a HEAT PUMP system set the HVAC
TYPE switch to HP. They are located under the top cover on the left.
• Set the HEAT TYPE switch in the GAS position if you have normal gas or oil heat
or if you have a heat pump with gas or oil auxiliary heat. Put the HEAT TYPE in
the ELEC position if you have normal electric heat or if you have a heat pump with
electric auxiliary heat.
Install 4 AA Batteries
• Install 4 AA alkaline batteries [required] following the
marked polarity in the battery compartments. Put the battery
in negative end rst against the spring, then push the
positive end in.
IMPORTANT: Press the RESET button (under top cover)
to implement the HVAC switch selections.
• With all the wires connected it is time to turn the AC power
back on. Do this at the breaker you used to switch it off. The CT32 will power-up in the OFF mode. Your CT32 is
not congured to operate your HVAC system yet. You must now congure your thermostat for your HVAC
system.
AA
AA
AA
AA
HVAC
GAS or
HEAT TYPE
ELEC
TYPE

PG 9
Caution
Special Thermostat Battery Cautions
Always replace the batteries as soon as the “Low Batt” ashes. The thermostat is a battery powered device.
You must be responsible to replace batteries before they run out. Failure to replace batteries can result in
overheating or excessive cooling of your house.
• Even if the “Low Batt” indicator does not ash, you should always replace the batteries at least once a year.
Replacing the batteries also helps to prevent leakage that can corrode and damage the thermostat.
• If you are leaving your home for a month or more, you should replace the batteries as a precaution against
battery failure in your absence.
• Always use new alkaline batteries.
• Failing to replace the batteries, when necessary, could cause the thermostat to lose power or malfunction. If
the thermostat loses power, then the thermostat will not control the temperature which could result in your HVAC
system not functioning as you intended and lead to possible damage from overheating or excessive cooling.
• If the thermostat batteries fail with the heat OFF, this can result in NO HEAT and possible frozen or broken
pipes and water damage.
• If the thermostat batteries fail with the cool OFF, this can
result in NO COOL and could cause possible damage or
excessive temperatures.
BATTERY WARNING
Do Not Use Re-chargeable Batteries
Do Not Mix Old And New Batteries.
Do Not Mix different battery types
ie. Alkaline, Standard (Carbon - Zinc), etc.
DO NOT DISPOSE OF BATTERIES IN FIRE. BATTERIES
MAY EXPLODE OR LEAK.

PG 10
Test Installation
Follow these procedures to verify you have correctly
installed the CT32.
TO CHECK FAN (If you connected the G wire):
Touch the fan icon on the HOME screen to turn the fan ON.
Verify that air is blowing from the system.
Touch the fan icon again to return to AUTO.
TO CHECK HEAT
Set the mode to HEAT by pressing the MODE button until
HEAT is displayed.
Touch the temperature display to bring up the MANUAL screen.
Touch the + icon and raise the target temp to change target temperature to about 5oF above room temperature;
allow the system 2 minutes to respond.
Verify that heat is blowing from the system. Return the Target Temperature to a normal setting. Return mode to
OFF by pressing the mode button.
If you have a heat pump, leave in off for 4 minutes before checking COOL.
TO CHECK COOL (do not operate AC if the outside temp is below 65oF)
Set the mode to COOL by pressing the MODE button until COOL is displayed.
Touch the - icon and lower cool Target Temperature to change target temperature to about 5oF below room
temperature. Allow the system 5 minutes to respond.
Verify that cool air is blowing from the system. Return mode to OFF by pressing the mode button.
HVAC Setup on Screen
IMPORTANT: Make sure the CT32 is powered up and
the mode is set to OFF. HVAC selection switches must be
set rst [pg 8].
• With mode in OFF press MENU and touch HVAC SET UP.
• Use +/- arrows to select HVAC SET UP number on
screen. The LCD display will show your selection and
indicate the number of stages you have selected. During
setup, 2nd stage will blink when both heat and cool have
2nd stages.
• Touch HOME to permanently save this conguration.
If you have a Normal HVAC system...
1 stage HEAT, 1 stage COOL select 1
2 stage HEAT, 1 stage COOL select 2
1 stage HEAT, 2 stage COOL select 3
2 stage HEAT, 2 stage COOL select 4
IMPORTANT: You must touch HOME after you have made you conguration selection.
This will save this conguration into permanent memory of the CT32.
If you have a HEAT PUMP HVAC system...
HEAT PUMP with no AUX heat select A
2 stage HEAT PUMP with no AUX select b
HEAT PUMP with AUX heat select C
HEAT PUMP with 2 stage AUX heat select d
2 stage HEAT PUMP with AUX heat select E
2 stage HEAT PUMP with 2 stage AUX heat select F
HEAT
2 ND STG
HVAC
SETUP
COOL

PG 11
Test Installation
Follow these procedures to verify you have correctly
installed the CT32.
TO CHECK FAN (If you connected the G wire):
Touch the fan icon on the HOME screen to turn the fan ON.
Verify that air is blowing from the system.
Touch the fan icon again to return to AUTO.
TO CHECK HEAT
Set the mode to HEAT by pressing the MODE button until
HEAT is displayed.
Touch the temperature display to bring up the MANUAL screen.
Touch the + icon and raise the target temp to change target temperature to about 5oF above room temperature;
allow the system 2 minutes to respond.
Verify that heat is blowing from the system. Return the Target Temperature to a normal setting. Return mode to
OFF by pressing the mode button.
If you have a heat pump, leave in off for 4 minutes before checking COOL.
TO CHECK COOL (do not operate AC if the outside temp is below 65oF)
Set the mode to COOL by pressing the MODE button until COOL is displayed.
Touch the - icon and lower cool Target Temperature to change target temperature to about 5oF below room
temperature. Allow the system 5 minutes to respond.
Verify that cool air is blowing from the system. Return mode to OFF by pressing the mode button.
AUTO
COOL
DAY
PM
F
LINK
RADIO
TARGET TEMP
1

PG 12
Congratulations, you have successfully
installed your unit.
Please proceed to the OPERATING Guide to
initialize the CT32.
IMPORTANT: If you have labeled and connected your
wires and followed the correct HVAC setup, and your system
still does not operate, contact technical support .
STATEMENT OF USE: This thermostat can be used with
24VAC heating and cooling systems and also millivolt
heating. It is powered by 4AA batteries, 24VAC (C wire),
or 24VAC adapter. It cannot be used with line voltage
HVAC systems. This thermostat is digital and your
desired heat or cool temperatures can easily be set on
the large touch screen with the +/- icons. In COOL and
heat pump operation, an automatic 4 minute off-time protects the compressor from damage.
This thermostat runs on 4AA batteries. The CT32 can be externally powered with a power source rated from
12V to 24V, AC or DC, at 100ma or greater. If used, connect to the C and RH terminals (no polarity). The 24VAC
“C” wire is the other side of the 24VAC heating transformer and can be found where the other thermostat wires
connect at the wall or at the furnace. Do not use the common or ground side of the line voltage.
MODE
button
MENU
button

PG 13
Step-by-step wiring diagrams
WIRES
3 Wire Heat GAS MILLIVOLT or 24VAC system
STEP 1 - Connect the R (or RH) wire to the RH terminal. This connects the
heat power.
STEP 2 - Connect the W wire to the W terminal.
This connects the heat.
STEP 3 - Connect the C wire to the C terminal.
Your heater is now connected to the CT32.
Please Go To Page 6
WIRES
4 Wire Heat
STEP 1 - Connect the R (or RH) wire to the RH terminal. This connects the
heat power.
STEP 2 - Connect the W wire to the W terminal. This connects the heat.
STEP 3 - Connect the G wire to the G terminal on the thermostat. This
connects the fan.
STEP 4 - Connect the C wire to the C terminal.
Your system is now connected to the CT32.
Please Go To Page 6
C B O W W2 Y Y2 RH RC G A
POWER
HVAC SYSTEM
THERMOSTAT
W
R
C
HVAC SYSTEM
THERMOSTAT
C B O W W2 Y Y2 RH RC G A
POWER
W
RG
C

PG 14
W Y RH G
WIRES
5 Wire Heat/Cool
STEP 1 - Connect the W wire to the W terminal. This connects the heat.
STEP 2 - Connect the Y wire to the Y terminal. This connects the cooling compressor.
STEP 3 - Connect the RH or R wire to the RH terminal. This
connects the power.
STEP 4 - Connect the G wire to the G terminal on the thermostat.
This connects the fan.
STEP 5 - Connect the C wire to the C terminal.
Your HVAC system is now connected to the CT32.
Please Go To Page 6
W Y RH RC G
WIRES
6 Wire HEAT/Cool
STEP 1 - Connect the W wire to the W terminal. This connects the heat.
STEP 2 - Connect the Y wire to the Y terminal. This connects to the cooling compressor.
STEP 3 - Disconnect the Rc and Rh terminals by removing RC-RH jumper wire.
STEP 4 - Connect the RH wire to the RH and the RC wire to the RC terminals. This connects power.
STEP 5 - Connect the G wire to the G terminal. This connects the fan.
STEP 6 - Connect the C wire from the HEAT to the C terminal.
Your HVAC system is now connected to the CT32.
Please Go To Page 6
HVAC SYSTEM
THERMOSTAT TERMINALS
C B O W W2 Y Y2 RH RC G A
POWER
WY
RG
C
HVAC SYSTEM
THERMOSTAT TERMINALS
C B O W W2 Y Y2 RH RC G A
POWER
WY
RHG
C
RC
*RC and RH
disconnected

PG 15
C
W
n
Y
n
RH
G
Multi-stage Heat and Multi-stage Cool
The CT32 can handle up to 2 stages of HEAT and 2 stages of COOL.
STEP 1 - Connect the W, W2 wires to the W terminals.
This connects the stages of HEAT.
STEP 2 - Connect the Y and Y2 wires to the Y terminals.
This connects the stages of COOL.
STEP 3 - Connect the RH or R wire to the RH terminal.
This connects the power.
STEP 4 - Connect the G wire to the G terminal.
This connects the fan.
STEP 5 - Connect the C wire to the C terminal.
Your HVAC system is now connected to the CT32.
Please Go To Page 6
5 Wire Heat Pump (heat/cool) without Auxiliary Heat
STEP 1 - Connect O wire to the O terminal or B wire to the B. This connects the change-over valve.
If you have both O and B - connect only the O wire to the O terminal and DO NOT connect
B to B terminal (see wire reference under Trane for B wire terminal).
STEP 2 - Connect the Y wire to Y terminal. This connects the compressor.
STEP 3 - Connect the R wire to RH. This connects the power.
STEP 4 - Connect the G wire to the G. This connects the fan.
STEP 5 - Connect the C wire to the C terminal.
Your HVAC system is now connected to the CT32.
Please Go To Page 6
HVAC SYSTEM
THERMOSTAT TERMINALS
C B O W W2 Y Y2 RH RC G A
POWER
W
Y Y2GR
C
W2
HVAC SYSTEM
THERMOSTAT TERMINALS
C B O W W2 Y Y2 RH RC G A
POWER
BO
Y GR
C
or
or

PG 16
C
O
o
r
B
A
UX
n
Y
n
RH
G
Multi-stage Heat Pump with Multi-stage Aux Heat
The CT32 can handle up to 2 stages of Pump compression and 2 stages of AUX heat.
STEP 1 - Connect O wire to the O terminal or B wire to the B. This connects the change-over valve.
If you have both O and B - connect only the O wire to the O terminal and DO NOT connect B to B
terminal (see wire reference under Trane for B wire terminal).
STEP 2 - Connect the AUX 1, AUX 2, to the AUX 1 and 2 respectively.
This connects the auxiliary heat.
STEP 3 - Connect the Y and Y2 wires to the Y terminals.
This connects the compressor.
STEP 4 - Connect the R wire to RH terminal. This connects the power.
STEP 5 - Connect the G wire to G terminal. This connects the fan.
STEP 6 - Connect the C wire to the C terminal.
Your HVAC system is now connected to the CT32.
Please Go To Page 6
HVAC SYSTEM
THERMOSTAT TERMINALS
C B O W W2 Y Y2 RH RC G A
POWER
B
GRY Y2
C O
or
or
AUX1 AUX2

PG 17
Wire Reference Table
Possible Wires What They Control
R or V or VR RH and RC Single power for HEAT and COOL
RH or 4 RH Power for HEAT (RH not connected to RC jumper removed)
RC RC Power for COOL (RH not connected to RC jumper removed)
W / AUX W Heat control or heat pump auxiliary heat
W2 / AUX2 W2 2nd stage HEAT or 2nd stage of 2 stage auxiliary heat
W3 / AUX3 W3 3rd stage HEAT or 3rd stage of 3 stage auxiliary heat
Y Y COOL control or 1st stage compression for heat pump
Y2 Y2 2nd stage COOL control or 2nd stage compression for a heat pump
G or F G FAN control
C or X C 24VAC power (to power thermostat)
NOTE: TRANE uses B for this connection
H H External Humidier
DH DH External De-Humidier
EX EX external fresh air bafe
B B Heat pump changeover (cool to heat, powered in heat)
O O Heat pump changeover (heat to cool, powered in cool)
B and O IMPORTANT: If there are both B and O wires (Trane pump
products) DO NOT CONNECT B to B terminal, connect B to C
terminal. If not a Trane product tape off B.
E n/a Emergency heat (do not connect, tape off)
L n/a System monitor (do not connect, tape off)
T n/a Outdoor sensor (do not connect, tape off) Wire Reference

PG 18
Wire Reference cont.
Possible Wires What They Control
Lennox Heat Pump
V or VR or R RH Power for HEAT
M or Y Y COOL control
Y or W or W2 W2 2nd stage HEAT for heat
pump auxiliary heat
F or G G Fan control
R or O O
X or X2 or C C
Trane Products [American Standard]
B C 24VAC power (to power
thermostat)
W or W1 W2 1st stage normal HEAT or 1st
stage heat pump auxiliary heat
X2 Emergency heat (do not connect,
tape off)
Zoned Hot Water Heat -
For Solenoid valve or Motor valve connect the wires
based on diagrams below to the correct terminal on the
CT32. The third wire on your valve may be called 6, Y,
or G.
Your Wires Thermostat Terminal
2 wire
R RH
W W
3 Wire
Solenoid Valves
R RH (power)
W A (heat ON)
Y or G (the 3rd wire) W (heat OFF)
SOLENOID VALV
E
W
A RH
CT32
MOTOR VALVE
W
RH A
CT32
FORR
3
WIRE
HOT WATER
W
R
A
W
R
A