Thermostat Manuals: Venstar T1045 Programmable Thermostat Installation Instructuion

Venstar T1045 Programmable Thermostat

Safety Warnings

CAUTION Follow Installation Instructions carefully.
DISCONNECT POWER TO THE HEATER – AIR CONDITIONER BEFORE REMOVING THE OLD THERMOSTAT AND INSTALLING THE NEW THERMOSTAT.

CAUTION
The two Alkaline “AA” batteries must be replaced at least once every 12 months to ensure proper operation. The Low Battery icon (fig. 1) will appear on the display when it is time to replace the batteries. If the thermostat is connected to 24v power, the batteries should still be installed, but are not required.

Venstar T1045 Programmable Thermostat fig-9 When battry is displayed the batteries must be replaced immediately. The manufacturer cannot be liable for improper operation of the thermostat if the batteries are not immediately replaced.
Annual battery replacement is especially critical in locations subject to freezing temperatures. The thermostat will be unable to turn on the heating system if the batteries are exhausted.

Preparation

Proper installation of the thermostat will be accomplished by following these step-by-step instructions. If you are unsure about any of these steps, call a qualified technician for assistance.
These tools will be required:
Make sure your Heater/Air Conditioner is working properly before beginning the installation of the thermostat.
Carefully unpack the thermostat. Save the screws and instructions.
Turn off the power to the Heating/Air Conditioning system at the main fuse panel. Most residential systems have a separate breaker for disconnecting power to the furnace.

Remove & Replace Old Thermostat

Remove the cover of the old thermostat. If it does not come off easily check for screws.
Loosen the screws holding the thermostat base or subbase to the wall, and lift away.
Disconnect the wires from the old thermostat. Tape the ends of the wires as you disconnect them, and mark them with the letter of the terminal for easy reconnection to the new thermostat.
Keep the old thermostat for reference purposes, until your new thermostat is functioning properly.

Battery Replacement

The batteries are easily accessible from the battery slot located on the front of the thermostat (fig. 1). To open the battery slot, press down on the battery cover
(fig. 1) and pull out (fig. 2).
Remove the old batteries and replace with the new AA alkaline batteries (fig. 3).
Place the bottom hook of the battery cover into the slot and snap closed (fig. 4).

The batteries must be replaced immediately when the thermostat displays the low battery icon (fig. 1). If the thermostat is connected to 24v power, the batteries should
still be installed. Installing the batteries when the system is powered (24VAC) will keep the clock running in the event of line power interruption.

Wire Connections

If the terminal designations on your old thermostat do not match those on the new thermostat, refer to the chart below or the wiring diagrams that follow. Venstar T1045 Programmable Thermostat fig-3

Sample Wiring Diagrams

4 Wire, 1 Stage Cooling, 1 Stage Heat-Heat Pump with O reversing valve.
Residential Heat Pumps, split systems & package units, with no auxiliary heat. Venstar T1045 Programmable Thermostat fig-4

* Common wire is optional in all installations. If a common wire is not used the thermostat must be powered by two AA alkaline batteries. These batteries must be replaced (page 6) each year or when the Low Battery indicator is displayed (page 3).

5 Wire, 1 Stage Cooling, 2 Stage Heat-Heat Pump with O reversing valve.
Residential Heat Pumps, split systems & package units, with auxiliary heat. Venstar T1045 Programmable Thermostat fig-5

Common wire is optional in all installations. If a common wire is not used the thermostat must be powered by two AA alkaline batteries. These batteries must be replaced (page 6) each year or when the Low Battery indicator is displayed (page 3).

4 Wire, 1 Stage Cooling, 1 Stage Heat-Heat Pump with B reversing valve.
Residential Heat Pumps, split systems & package units, with no auxiliary heat. Venstar T1045 Programmable Thermostat fig-6

5 Wire, 1 Stage Cooling, 2 Stage Heat-Heat Pump with B reversing valve.
Residential Heat Pumps, split systems & package units, with auxiliary heat. Venstar T1045 Programmable Thermostat fig-7

Test Operation

Turn on the power to the Heat Pump.
On the thermostat, slide the Mode Switch to HEAT. Press the COOLER or WARMER button until the set temperature is 10 degrees above room temperature. The HVAC unit should energize in the heating mode.
Note: You may need to wait up to five minutes for the heating to energize due to the compressor lockout feature. There is a two-minute minimum run-time for first-stage heating.
On the thermostat, slide the Aux Heat Switch to the NORMAL position. The
Aux Heat icon will appear indicating that the thermostat has energized Aux Heat (page 7 of the Owner’s Manual).
TWO-STAGE OPERATION – The 2nd stage of heat (auxiliary heat) is turned on when the room temperature is equal to or less than: the setpoint minus the 1st stage deadband (one degree, adjustable), minus the 2nd stage deadband (two degrees, non-adjustable).
On the thermostat, slide the Mode Switch to COOL. Press the COOLER or WARMER buttons until the set temperature is 10 degrees below room temperature. The HVAC unit should energize in the cooling mode (Page 6 of the Owner’s Manual).
Note: You may need to wait up to five minutes for cooling to energize due to the compressor lockout feature.
On the thermostat, slide the Mode Switch to OFF. Slide the Fan Switch to Fan On. The fan should turn on and run continuously.

Trouble Shooting

SYMPTOM: The slide switches on the thermostat are very difficult to move.
CAUSE: The backplate of the thermostat is screwed too tightly into a wall that is not perfectly flat.
REMEDY: Loosen the screws holding the thermostat into the wall.
SYMPTOM: The Air Conditioning does not attempt to turn on.
CAUSE: The cooling setpoint is set too high, the Mode Switch is not set for Cool, the batteries are too weak, or the Aux Heat Switch is set for Emergency.
REMEDY: Consult the Normal Operation section in the Owner’s Manual to:
- Lower the cooling setpoint.
- Correct the Mode Switch position.
- Replace the batteries.
- Slide the Aux Heat Switch to Normal.
SYMPT OM: The fan does not turn on even though the compressor has energized.
CAUSE: The Fan Switch is not completely in the On or Auto position.
REMEDY: Slide the Fan Switch firmly into the On
SYMPTOM: Aux Heat does not turn on. CAUSE: The Aux Heat Switch is set for
Lockout.
REMEDY: Consult the Aux Heat section of this manual to slide the Aux Heat Switch to Normal (Page 7 of the Owner’s Manual).
SYMPTOM: The Heating does not attempt
to turn on.
CAUSE: The heating setpoint is set too high, the Mode Switch is not set for Heat, the batteries are too weak, or the Aux Heat Switch is set for Emergency.
REMEDY: Consult the Normal Operation section in this manual to:
- Raise the heating setpoint.
- Correct the Mode Switch position.
- Replace the batteries.
- Slide the Aux Switch to Normal.

Warranty

One-Year Warranty – This Product is warranted to be free from defects in material and workmanship. If it appears within one year from the date of original installation, whether or not actual use begins on that date, that the product does not meet this warranty, a new or remanufactured part, at the manufacturer’s sole option to replace any defective part, will be provided without charge for the part itself provided the defective part is returned to the distributor through a qualified servicing dealer.
THIS WARRANTY DOES NOT INCLUDE LABOR OR OTHER COSTS incurred for diagnosing, repairing, removing, installing, shipping, servicing or handling of either defective parts or replacement parts. Such costs may be covered by a separate warranty provided by the installer.
THIS WARRANTY APPLIES ONLY TO PRODUCTS IN THEIR ORIGINAL INSTALLATION LOCATION AND BECOMES VOID UPON REINSTALLATION.
LIMITATIONS OF WARRANTIES – ALL IMPLIED WARRANTIES (INCLUDING IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE AND MERCHANTABILITY) ARE HEREBY LIMITED IN DURATION TO THE PERIOD FOR WHICH THE LIMITED WARRANTY IS GIVEN. SOME STATES DO NOT ALLOW LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE MAY NOT APPLY TO YOU. THE EXPRESSED WARRANTIES MADE IN THIS WARRANTY ARE EXCLUSIVE AND MAY NOT BE ALTERED, ENLARGED, OR CHANGED BY ANY DISTRIBUTOR, DEALER, OR OTHER PERSON WHATSOEVER. ALL WORK UNDER THE TERMS OF THIS WARRANTY SHALL BE PERFORMED DURING NORMAL WORKING HOURS. ALL REPLACEMENT PARTS, WHETHER NEW OR REMANUFACTURED, ASSUME AS THEIR WARRANTY PERIOD ONLY THE REMAINING TIME PERIOD OF THIS WARRANTY.
THE MANUFACTURER WILL NOT BE RESPONSIBLE FOR:

Normal maintenance as outlined in the installation and servicing instructions or owner’s manual, including filter cleaning and/or replacement and lubrication.
Damage or repairs are required as a consequence of faulty installation, misapplication, abuse, improper servicing, unauthorized alteration or improper operation.
Failure to start due to voltage conditions, blown fuses, open circuit breakers or other damages due to the inadequacy or interruption of electrical service.
Damage as a result of floods, winds, fires, lightning, accidents, corrosive environments or other conditions beyond the control of the Manufacturer.
Parts not supplied or designated by the Manufacturer, or damages resulting from their use.
Manufacturer products installed outside the continental U.S.A., Alaska, Hawaii, and Canada.
Electricity or fuel costs or increases in electricity or fuel costs for any reason whatsoever including additional or unusual use of supplemental electric heat.
ANY SPECIAL INDIRECT OR CONSEQUENTIAL PROPERTY OR COMMERCIAL DAMAGE OF ANY NATURE WHATSOEVER. Some states do not allow the exclusion of incidental or consequential damages, so the above may not apply to you.
This warranty gives you specific legal rights and you may also have other rights which may vary from state to state.