YOUR THERMOSTAT REPLACES
Description | |
Heat Pump (No Aux or Emergency Heat) | Yes |
Heat Pump (with Aux or Emergency Heat) | Yes |
Standard Heat & Cooling Systems | No |
Standard Heat Only Systems | No |
Millivolt Heat Only Systems – Floor or Wall Furnaces | No |
Standard Central Air Conditioning | No |
Gas or Oil Heat | No |
Electric Furnace | No |
Hydronic (Hot Water) Zone Heat – 2 Wires | No |
Hydronic (Hot Water) Zone Heat – 3 Wires | No |
Assemble tools required as shown below.
CAUTION
To prevent electrical shock and/or equipment damage, disconnect electrical power to the system at the main fuse or circuit breaker until installation is complete.
Before removing wires from the old thermostat’s switching subbase, label each wire with the terminal designation it was removed from.
ATTENTION! This product does not contain mercury. However, this product may replace a unit that contains mercury.
Do not open mercury cells. If a cell becomes damaged, do not touch any spilled mercury. Wearing non-absorbent gloves, take up the spilled mercury and place into a container that can be sealed. If a cell becomes damaged, the unit should be discarded.
Mercury must not be discarded in household trash. When the unit this product is replacing is to be discarded, place in a suitable container.
Refer to www.white-rodgers.com for locations to send products containing mercury.
ATTENTION! This product does not contain mercury. However, this product may replace a unit that contains mercury.
Do not open mercury cells. If a cell becomes damaged, do not touch any spilled mercury. Wearing non-absorbent gloves, take up the spilled mercury and place into a container which can be sealed. If a cell becomes damaged, the unit should be discarded.
Mercury must not be discarded in household trash. When the unit this product is replacing is to be discarded, place in a suitable container and return to White-Rodgers at 2895 Harrison Street, Batesville, AR 72501-2117 for proper disposal.
WARNING
Do not use on circuits exceeding specified voltage. Higher voltage will damage control and could cause shock or fire hazards.
Do not short out terminals on gas valve or primary control to test. Short or incorrect wiring will damage the thermostat and could cause personal injury and/or property damage.
Thermostat installation and all components of the system shall conform to Class II circuits per the NEC code.
Electric/Gas Jumper (Fan Option)
If your emergency or auxiliary system will energize the blower, then jumper W906 on the thermostat base must be cut (see fig. 1).
If your emergency or auxiliary heat system requires that the thermostat energize the fan circuit, do not cut jumper W906. If you are unsure of your application, contact a qualified service person.
°F or °C Selection
The factory default setting for temperature display is Fahrenheit. If you want the temperature in Celsius, clip jumper W904.
Fast or Slow Cycle Selection
The factory default setting is fast cycle, which cycles 1st stage at approximately 1.2°F and 2nd stage 0.75°F. If you prefer slow cycle, clip jump W905. The 1st stage and 2nd stage would be 1.5°F and 1.2°F respectively.
O/B Terminal Switch Selection
The O/B switch on this thermostat is factory set to “O” position. This will accommodate the majority of heat pump applications, which require the changeover relay to be energized in COOL. If the thermostat you are replacing or the heat pump being installed with this thermostat requires a “B” terminal, to energize the changeover relay in HEAT, the O/B switch must be moved to the “B” position.
Attach Thermostat Base to Wall
Battery Location
This thermostat requires 2 “AAA” alkaline batteries to operate. If
If at any time during testing your system does not operate properly, contact a qualified service person.
Turn on power to the system.
Fan Operation
If your system does not have a G terminal connection, skip to Heating System.
Heating System
Emergency System
EMER bypasses the Heat Pump to use the heat source wired to terminal E on the thermostat. EMER is typically used when compressor operation is not desired, or you prefer backup heat only.
Cooling System
CAUTION!
To prevent compressor and/or property damage, if the outdoor temperature is below 50°F, DO NOT operate the cooling system.
CAUTION!
Do not allow the compressor to run unless the compressor oil heaters have been operational for 6 hours and the system has not been operational for at least 5 minutes.
Before you begin using your thermostat, you should be familiar with its features and with the display and the location and operation of the thermostat buttons. Your thermostat consists of two parts: the thermostat cover and the base. To remove the cover, pull it straight out from the base. To replace the cover, line up the cover with the base and press until the cover snaps onto the base.
The configuration menu allows you to set certain thermostat operating characteristics to your system or personal requirements.
Move the SYSTEM switch to the OFF position, then press
The configuration menu chart summarizes the configuration options. An explanation of each option follows.
Press
Step | Press Button(s) | Displayed (Factory Default) | Press or to select: |
1 | Set SYSTEM switch to OFF | ||
2 | and for at least 2 seconds | FA (ON) | OFF |
3 | and momentarily | CL (OFF) | ON |
4 | and momentarily | 0 HI (0) | 3 LO TO 3 HI |
5* | and momentarily | dL (ON) | OFF |
6 | Move SYSTEM switch from OFF | Return to normal operation |
ELECTRICAL DATA
THERMAL DATA
Reset Operation
If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation you can reset the thermostat by pressing
Batteries
For best results, replace batteries once a year with new premium brand alkalines batteries such as Duracell® or Energizer®.
Symptom | Possible Cause | Corrective Action |
No Heat/No Cool/No Fan (common problems) | 1. Blown fuse or tripped circuit breaker. 2. Furnace power switch to OFF. 3. Furnace blower compartment door or panel lose or not properly installed. | Replace the fuse or reset the breaker. Turn the switch to ON. Replace the door panel in the proper position to engage the safety interlock or door switch. |
Symptom | Possible Cause | Corrective Action |
No Heat | 1. Pilot light not lit. 2. System Switch not set to HEAT.
3. Loose connection to thermostat or system.
4. Furnace Lock-Out Condition. Heat may also be intermittent.
5. Heating system requires service or thermostat requires replacement. | Re-light pilot. Set System Switch to HEAT and raise the setpoint above room temperature. Verify thermostat and system wires are securely attached. Many furnaces have safety devices that shut down when a lock-out condition occurs. If the heat works intermittently contact the furnace manufacturer or local service person for assistance. Diagnostic: Set System Switch to HEAT and raise the setpoint above room temperature. Within a few seconds the thermostat should make a soft click sound. This sound usually indicates the thermostat is operating properly. If the thermostat does not click, try the reset operation listed above. If the thermostat does not click after being reset contact your heating and cooling service person or place of purchase for a replacement. If the thermostat clicks, contact the furnace manufacturer or a service person to verify the heating is operating correctly. |
No Cool | 1. System Switch not set to COOL.
2. Loose connection to thermostat or system.
3. Cooling system requires service or thermostat requires replacement. | Set System Switch to COOL and lower setpoint below room temperature. Verify thermostat and system wires are securely attached. Same procedure as diagnostic for No Heat condition except set the thermostat to COOL and lower the setpoint below the room temperature. There may be up to a five minute delay before the thermostat clicks in Cooling. |
Heat, Cool or Fan Runs Constantly. | 1. Possible short in wiring. 2. Possible short in thermostat. 3. Possible short in heat/cool/fan system. 4. Fan Switch set to Fan On. | Check each wire connection to verify they are not short- ed or touching together. No bare wire should stick out from under terminal screws. Try resetting the thermostat as described above. If the condition persists the manufac- turer of your system or service person can instruct you on how to test the Heat/Cool system for correct operation. If the system operates correctly, replace the thermostat. |
Furnace (Air Conditioning) Cycles Too Fast or Too Slow (narrow or wide temperature swing) | 1. The location of the thermostat and/or the size of the Heating (Cooling) System may be influencing the cycle rate. | Digital thermostats normally provide precise temperature control and may cycle faster than some older mechanical models. A faster cycle rate means the unit turns on and off more frequently but runs for a shorter time so there is no increase in energy use. If you would like to increase the cycle time, clip Jumper W-905 as mentioned in the instructions for Hydronic Heating Systems. It is not pos- sible to shorten the cycle time. If an acceptable cycle rate is not achieved as received or by clipping W-905 contact a local service person for additional suggestions. |
Thermostat Setting and Thermostat Thermometer Disagree | 1. Thermostat thermometer setting requires adjustment. | Thermostat thermometer can be adjusted +/-3 degrees. See Temperature Display Adjustment in the Operation section |
Blank Display and/or Keypad Not Responding | 1. Voltage spike or static discharge, | Use the Reset Operation listed above. |
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