CTC Union 43168 User manual

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Model 43168 Owners Manual
HEAT PUMP PROGRAMMABLE
THERMOSTAT
PM
COOL TEMP
3
SA
Form 44014-01 r010408

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Congratulations!
Thank you for choosing a Climate Technology Corporation (CTC)
programmable thermostat. Your new CTC thermostat will provide years of
reliable service and year-round energy savings.
Please read this manual before beginning installation and save this booklet
for complete operation instructions.
The CTC Technical Support Group is available from 8 am to 5 pm EST M-F. They may be reached
toll-free at 1-800-676-7861.
Heat Pump
Programmable Thermostat
Model 43168
THERMOSTAT CONTROLS
Switches & Buttons..................................................................................15
Settings....................................................................................................17
Methods of Operation ..............................................................................19
Icons & Features......................................................................................33
Important Features...................................................................................34
OPERATON
Review the Set Temperature....................................................................35
Change the Set temperature....................................................................35
Heating or Cooling...................................................................................35
Setting Options ........................................................................................36
Filter Reminder ........................................................................................38
Resetting Your Thermostat ......................................................................38
TROUBLESHOOTING......................................................................................38
WIRING DIAGRAM...........................................................................................40
IMPORTANT INFORMATION ............................................................................4
INSTALLATION
What You Need..........................................................................................4
Remove Old Thermostat............................................................................5
Wire Labeling.............................................................................................6
Mount Wallplate.........................................................................................8
Connect Wires & Mount Thermostat to Wallplate....................................10

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1.This thermostat is designed to work on the following systems:
• Single-Stage Heat Pump
• Mulit-stage Heat Pump (up to 2 heating and 2 cooling)
2.Temperature Range This thermostat can be set between 45°F and 95°F (7°C and
35°C).However, it will display room temperatures from 30°F to 99°F (0°C and 37°C). “HI” will
be displayed if the temperature is higher than 99°F (37°C), and “LO” will be displayed if the
temperature is lower than 30°F (0°C).This thermostat will automatically cutoff in Heat mode if
the temperature rises above 95°F (35°C), and automatically cutoff in Cool mode if the tem-
perature drops below 40°F (4°C).
3.Compressor Protection This thermostat provides a 3.5 minute delay after shutting off
the system before it can be restarted. This feature will prevent damage to your compressor
caused by rapid cycling.
IMPORTANT INFORMATION
What You Need
This thermostat includes two #8 slotted screws and two wall anchors for mounting. To install
your thermostat, you should have the following tools and materials.
• Slotted screwdriver(s)
• Small Philips screwdriver
• Hammer
• Electric drill and 3/16” bit
INSTALLATION
Remove Old Thermostat
CAUTION: Do not remove any wiring from the existing thermostat before reading these
instructions carefully. Wires must be labeled prior to removal.
IMPORTANT! Turn off the power to the HVAC system at the mainpower panel or at the
HVAC system.
Remove existing thermostat cover and thermostat. See Figure 1. Some thermostats will have
screwsorotherlockingdevicesthatmustrstberemoved.Oncethewallmountingplateis
exposed, look for wires.
If wires are not visible, they may be connected to the back of the wallplate. Again, look for
screws, tabs, etc. Some models have doors that open to expose wires and mounting screws.
See Figure 1.
Figure 1

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Wire Labeling
• CAUTION! TURN OFF POWER TO THE HEAT PUMP SYSTEM BEFORE YOU ATTEMPT
TOACCESS THE THERMOSTAT’S WIRING.
• IMPORTANT! BEFORE DISCONNECTING ANY WIRES FROM THE EXISTING
THERMOSTAT, APPLY THE PROVIDED SELF-ADHESIVE LABELS TO THE WIRES.
• Use the information in Table 1 below and the provided adhesive labels to label the wires.
IGNORE THE COLOR OF THE WIRES since these do not always comply with the
standard.
• Afterlabelingthewires,disconnectthemfromtheexistingthermostatterminals.
• Removeexistingwallplate.Tomakesurewiresdonotfallbackintowallopening,youmay
want to secure them to the wall.
• Iftheholeinwallislargerthannecessaryforwires,sealtheholewithinsulatingmaterialso
that no hot or cold air can enter the back of the thermostat from the wall. This air could cause
a false thermostat reading.
• Awiringdiagramisprovidedonpage40oftheseinstructions.
Table 1
If the terminal letter
on the existing
thermostat is. . .
R, V-VR, or VR-R R
Y, Y1, or M Y1
Y2 Y2
W1, W2, or W-U W2
E E
G or F G
O or R O
B B
L or X L
C, X, or B C (Required)
. . .then mark the
wire with adhesive
label

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Mount Wallplate
• Remove the wallplate from the thermostat by pressing the release tab on the bottom of the thermostat.
See Figure 2.
Figure 2
• Positionwallplateonwallandpullexistingwiresthroughthelargeopening,thenlevelforappearance.If
the existing mounting holes from the old wallplate line up with the slots in the new wallplate, then use the
exisitng holes. If the exisitng holes do not line up with the slots in your new wallplate, then mark the wall
for holes for the provided plastic anchors.
• Drillholeswith3/16”bitandgentlytapanchorsintotheholesuntilushwithwall.
• Reposition wallplate, pulling wires through large opening. Insert provided mounting screws into wall
anchor and tighten. See Figure 3.
Figure 3
Release Tab
R
E
B
G
W2 O
Y1
Y2 LC
Wallplate
Thermostat

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ON
O
N
12
HE
HG
F
C
Connect Wires and Mount Thermostat to Wallplate
• Match and connect the labeled wires to the appropriate coded terminal screws on the wallplate. See
Figure 4. Ignore any wires which may be present, but which were not connected to the old thermostat.
R
Figure 4
Terminal Screws
• Be sure to tighten the terminal screws securely, as a loose wire could cause operational problems with
your system or thermostat.
• Push excess wire back into the hole to prevent interference when installing the thermostat to the
wallplate.
• SettheSystemSwitchto“off”,andtheFanSwitchto“auto”.
• Onthe backof thethermostataretheSystemSet-UpSwitches.SeeFigure5.(NOTE:Forclarity, the
illustration of the thermostat circuit board omits most of the circuit board components to clearly show the
System Set-Up Switches.) If the heat pump system has an electric auxiliary system, then slide the #1
switch to HE position. If the heat pump system has a gas auxiliary system, then slide #1 switch to the HG
position.
To set up the LCD display to show the temperature in Fahrenheit, slide the #2 switch to the F position. To
set up the LCD display to show the temperature in Celsius, then slide the #2 switch to the C position.
Figure 5
System Set-Up
Switches
Back of Thermostat

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THERMOSTAT CONTROLS
• Open the thermostat’s front cover. See Figure 6.
Figure 6
• Insertthetabsontopofthethermostatbodyintotheslotsatthetopofthewallplate.Pressthebottomof
the thermostat body into the snap on the bottom of the wallplate. (NOTE:Donotforcethethermostatonto
the wallplate, as the terminal pins may be damaged. If it does not snap properly, the thermostat may not
work.)
• Turnonpowertotheheatpumpsystem.
• If the wiring to the thermostat has been correctly connected, and if the thermostat has been correctly
mounted to the wallplate, then the LCD Display should show the indoor room temperature.

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system
off
cool
heat fan auto
refresh
on reset hold/rtrn
em
heat
sys
em
aux
lter
program
day/time
A
B
C
D
E
I
J
K
Switches and Buttons Switches and Buttons
A LCD Readout - displays indoor temperature, set temperature, and information about the heat pump
system’s operation and status.
B System Switch-“emheat”istheEmergencyHeat.NOTE:TheEmergencyHeatModeisnotanenergy
saving mode, so use it only when necessary. “heat” is the normal heat mode. “off” turns the system off.
“cool” is the normal cooling mode.
C Fan Switch - InAuto mode, the fan runs when the system is on for heating or cooling. The Refresh mode
sets the fan to run automatically at intervals of 10, 15, 20, or 30 minutes out of every hour when the system
is not running for heating or cooling. In the On mode, the fan runs continuously regardless of system
status.
D Reset button - push the Reset button with the end of a paper clip to reset the thermostat and return to its
factory default settings.
E Hold/Return button - used for setting a permanent (vacation) hold, and for returning to the normal display
from Day & Time setting, Programming, or Option setting modes.
F Filter button - reviews and resets the thermostat’s Filter Life Counter.
G Day/Time button - used for entering the Clock Setting mode. Use with the Up and Down buttons to set
the time and day.
H Program button - used for entering and modifying programs. Use with the Up and Down buttons to
set times and temperatures. Press when in clock mode to select between 12-hour and 24-hour clock
modes.
I Down button - used to change the temperature setting and the option settings.
J Up button - used to change the temperature setting and the option settings.
K System LED’s - for heat pump systems that have fault detection capabilities, the “sys” LED glows red
when the thermostat has detected a fault through the L terminal connection from the heat pump.The “em”
LED glows red when Emergency Heat is turned on. The “aux” LED glows green when the auxiliary heat is
turned on.
F
G
H

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The default for this thermostat setting is in a 12 hour format. You can change the format to 24
hour format by pressing Da y /Ti m e and then Pr o g r a m .
The AM/PM indicator will be off when the thermostat is in 24 hour mode.
Settingdayandtime:
1. Press Da y /Ti m e .(AM/PMandcurrenthourwillash)
Press UPor Do w n to adjust the setting.
2. Press Da y /Ti m e again to adjust the minute setting.
Press UPor Do w n to adjust the setting.
3. Press Da y /Ti m e again to adjust the day of the week.
Press UPor Do w n to adjust the setting.
4. Press Da y /Ti m e to return to the normal display.
Press UPor Do w n to adjust the setting.
You may also press Ho l D /re T U r n at any time to return to the normal display.
Settings
program
day/time
AM
PM

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This thermostat gives you the ability to program up to 4 custom temperature settings per day or
utilize pre-programmed settings.
For manual operation instructions, see pages 21-23.
To utilize the pre-programmed settings, see pages 24-25.
To create custom programs, see pages 26-29.
Methods of Operation
AM
HEAT
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