INSTEON Thermostat with Humidity (2441TH) Manual - Manual (Page 11)

Page 11 of 28 Rev: 1/21/2014 8:35 AM
Installation
CAUTIONS AND WARNINGS
Read and understand these instructions before installing and retain them for future reference.
IMPORTANT: HOW DO I KNOW THIS WILL WORK WITH MY SYSTEM?
1) Your existing HVAC can operate 2 stages of Heat and Cool.
2) Your existing thermostat operates on 24V.
3) Your system is not a heat pump.
4) Your system is not a 120/240V electric radiant heater.
5) Your existing thermostat is not millivolt controlled.
6) Your existing thermostat has 5 or more wires connected.
INSTEON Thermostat is designed to operate on a minimum 5-wire, 24V HVAC unit. If you have only 4
wires you can purchase the “Add-A-Wire” adapter item #304AAW from www.smarthome.com .
Note: Installation should be performed only by a qualified HVAC Technician or a homeowner who is familiar and
comfortable with electrical circuitry. If you have any questions regarding installation, consult an HVAC Technician
or call the INSTEON Support Line at 800-762-7845.
Tools Needed
• Flathead screwdriver
• Wire cutter/stripper
Installation
Proper installation of the INSTEON Thermostat will be accomplished by following these step-by-
step instructions
1) Do not remove wires from existing thermostat until instructed.
2) If you have A/C, turn off A/C breaker.
a. Confirm A/C is off by turning on air and observing that compressor/fan do not come on.
3) Turn off breaker/fuse to furnace.
a. If thermostat no longer functions, move to next step.
b. If thermostat still functions, it is probably running off battery power. Try to turn on heat.
i. If heat doesn’t turn on, move to next step.
ii. Otherwise, turn off heat and wait until furnace fan stops, then try another
breaker until heat no longer runs.
4) Remove cover from existing thermostat to gain access to wires (may need to detach from wall).
5) If necessary, take photo of wiring connections to help with reconnections.
6) If possible while still connected, attach the “C” label to the wire connected to “C” on your
thermostat. Otherwise, label C wire once disconnected.
7) Disconnect your C wire from thermostat.
8) Repeat for all your other wires, being careful to not pull off wire stickers or mar paint or wallpaper.
9) Remove existing thermostat back from wall.
10) Remove 3” of the outer jacket from the wires exposing the
individually colored wires. This ensures the outer insulation does
not press against the internal components of the INSTEON
Thermostat upon closing the unit. Note: if your system has 4
wires, you will need the “Add-a-Wire” adapter. See Cautions and
Warnings above.)
a. Be careful not to tear off the labels that you previously
attached to the wire ends.
b. If you do not have 3” after stripping away the outer
jacket, you can extend the inner wires by splicing on a
new longer conductor.
i. "Thermostat" cabling is available at most home improvement centers. It comes in
different wire configurations, but the same gauge. If the wire you have now is 5-
conductor cable, buy 5-conductor thermostat wire and connect it matching color-
to-color.
c. If wires are longer than 3”, trim them back or make sure you can push the excess back
into the wall. Be careful not to cut off the wire designation label.
11) Slide all wires through large hole in back of INSTEON Thermostat.
12) Mount INSTEON Thermostat to wall.