Radio Thermostat of America CT110R1 Users Manual
Install Guide CT110
Caution
• 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.
• Your thermostat is a precise instrument, handle it with care.
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.
1308-001-001
INSTALLATION
Wall Plate
and
Wall plate frame
Thermostat
LCD screen
Reset
Button
MODE
button
Indicators
FAN
button
Z-Wave join
Button
Temperature
adjust buttons
ENGLISH
TOOLS
You will need a small Phillips screwdriver and a drill with 3/16-in. (4.8mm) bit for wall mounts.
PG 2
LOCATION
Replacement installations - mount the CT110 in place of the old thermostat.
A new location will require moving your wiring.
For new installations and relocating the CT110 - 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 CT110 until all construction and painting has
been completed.
• This thermostat does not require leveling.
Good
5ft.
(1.5m)
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 identication.
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 removing 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
W
G
PG 3
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 CT110 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.
Y2
Y
RH RC
Jumper
wire
G A
PG 4
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 CT110.
• 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.
Wire Terminals
Find the step-by-step diagram for your system
WIRES
C W R
From
HVAC
2 Wire
Heat
W
R
Go To Page 15
WIRES
C Wn Yn R G
om
Fr
HVAC
W
Go To Page 17
Multi-stage Cool
Multi-Stage Heat
n
Y
n
R
WIRES
C W R G
From
HVA
3 Wire
C
Heat
WIRES
C W Y R G
m
o
r
F
HVA
C
4 Wire
Heat/Cool
WIRES
C W Y RH RC G
From
C
A
HV
5 Wire
Heat/Cool
• Select the reference page
with your wiring diagram and
set-up information below.
• The C-wire is optional but
preferred. Without a C-Wire the
CT110 will operate on batteries
W
G
R
Go To Page 15
R
W
Y
G
W
Go To Page 16 Go To Page 16
RH
Y
RC
only for about one year.
G
• Hot water systems diagrams
are on pg20.
WIRES
C B
Fr
HVAC
or
om
O AUX
Multi-stage
Heat Pump
Multi-stage
Aux Heat
n
Yn R G
w/
• 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
WIRES
C B
From
HVAC
or
O Y R G
4 Wire Heat Pump
w/o Aux Heat
customer support for help.
B
O
Y
R
G
or
G
Go To Page 17
B
O
AUX
or
Go To Page 18
n
Yn
R
G
PG 5
• “Fan out” wires as illustrated with CT110 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 CT110 to t snug to the wall.
• Position the wires through the wall plate to the terminal area.
• Do not bunch wires behind the wall plate. Feed any slack back into
the wall opening.
• The Wall Plate Frame is optional, but you must have it in place when
you thread your wires into the wall plate.
C
from HVAC
System
W
PG 6
2.6"
G
RH
Y
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: You can mount the wall plate to the wall rst, then
connect the wires, and mount the CT110.
• The CT110 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).
wires from
W
C
HE
AT/COOL system
Y
RH
G
Mount the Wall plate to wall
NOTE: If you are mounting to sheet
rock or if you are using the old mounting holes, use the plastic anchors
provided. Mark rst and drill a 3/16-in.(4.8mm) hole for the insert at each
screw location, then mount the unit.
1. Hold the CT110 wall plate
against the wall, with the wires
coming through the hole in the
wall plate.
Screw to wall
C
W
Y
RH
2. Position wall plate for best
appearance.
3. Attach the wall plate to the
G
wall with the screws provided.
PG 7
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