HEAT/COOL and HEAT PUMP THERMOSTAT Installation and Start-up Instructions WARNING: Before installing thermostat, turn off all power to unit. There may be more than one power disconnect. Electrical shock can cause personal injury or death. NOTE:
operation) and mark wall through 2 mounting holes. 5. Drill two 3/16-in. mounting holes in wall where marked. (Note: Mounting holes on thermostat are designed to fit on a horizontal J-box). 6. Secure back plastic to wall with 2 anchors and screws provided making sure all wires extend through hole in plastic. 7. Connect wires to proper terminal of the connector block in the front piece of plastic. 8. Push any excess wire back into wall. Excess wire inside the thermostat plastic case can interfere with proper air flow across the temperature sensor. Seal hole in wall to prevent air leaks. Leaks can affect operation. 9. Snap front and back pieces of plastic together. 10. Turn on power to the unit. On power up, the LCD readout will display HC (Heat/Cool).or HP (Heat Pump) depending upon model. WIRING DIAGRAMS NOTE: All excess wire should be pushed back into the wall as far as possible. Excess wire inside the thermostat plastic case may interfere with the air flow across the temperature sensor.
Read all instructions before starting the installation.
HEAT C OO L O PERATIO N SIN GLE STAGE FU RN ACE
SINGLE-SPEED C O M PR ESSO R
Selects system mode: OFF, HEAT, COOL, or EMHT
Decrease Temperature Turns Continuous Fan Operation On or Off
24 VAC HO T
24 VAC COMM
CO M PR ESSOR
(OP T IO N AL)
HEATPU M P OPER ATIO N TY PIC AL FAN C OIL
SAFETY CONSIDERATIONS Improper wiring or installation may damage thermostat. Wiring must conform to local and national electrical codes. INTRODUCTION The thermostat is a wall mounted, low-voltage thermostat which maintains room temperature by controlling the operation of a heating and air conditioning system. Batteries are not required; temperature and mode settings are preserved with the power off. INSTALLATION CONSIDERATIONS The thermostat requires no batteries. The heat pump thermostat is not a power stealing device and MUST have both R and C connected. INSTALLATION I. THERMOSTAT LOCATION Thermostat should be mounted: - Approximately 5 ft. (1.5m) from floor. - Close to or in a frequently used room, preferably on an inside partitioning wall. - On a section of wall without pipes or duct work. Thermostat should NOT be mounted: - Close to a window, on an outside wall, or next to a door leading to the outside. - Exposed to direct light and heat from a lamp, sun, fireplace, or other temperature-radiating object which may cause a false reading. - Close to or in direct airflow from supply registers and return-air grilles. - In areas with poor air circulation, such as behind a door or in an alcove. II. INSTALL THERMOSTAT 1. Turn off all power to unit. 2. If an existing thermostat is being replaced: A. Remove existing thermostat from wall. B. Disconnect wires from existing thermostat, one at a time. Be careful not to allow wires to fall back into the wall. C. As each wire is disconnected, record wire color and terminal marking. D. Discard or recycle old thermostat. NOTE: Mercury is a hazardous waste and MUST be disposed of properly. 3. Separate the front and back pieces of plastic. 4. Route thermostat wires through hole in back piece of plastic. Level plastic against wall (for aesthetic value only - thermostat need not be leveled for proper
A U X .H EA T
R EV V A LV E
24 V A C HO T 24 VAC COMM
C O M PR ESSO R
SINGLE-SPEED H EAT PUM P
(RE Q U IRE D )
* 270 O HM
* A 270 Ohm power resistor (Included) is sometimes necessary for Thermostat loading.
III SET THERMOSTAT CONFIGURATION While in configuration mode, three option choices can be made: A Anticipator Value Adjustment d Display temperature Fahrenheit/Celsius Selection Fn Fan operates with heat r Reversing valve operates with heat or cool (HP mode) oF Offset Adjustment for Room Temperature
oP Operation in either HP or H/C mode TO ENTER THE CONFIGURATION MODE: Press and hold the FAN button for approximately 10 sec until room temperature disappears and the display reads “A “. You are now in the configuration mode. NOTE: If the FAN button is pressed again or if no button is pressed for 2 minutes, the thermostat will exit the configuration mode and return to normal operation. To re-enter the configuration mode, the FAN button must be pressed and held for 10 sec. again. WHILE IN CONFIGURATION MODE, THE FOLLOWING OPTIONS ARE AVAILABLE:
ANTICIPATOR - Value Adjustment This adjustment controls the sensitivity and cycle rate of the thermostat. Higher numbers decrease the sensitivity and slow the cycle rate. Lower numbers increase the sensitivity and increase cycle rate. However, a limiting feature will not allow more than 4 equipment cycles per hour, regardless of setting. Values can range from 1 to 3. Factory default setting is 2. This default selection will provide optimum performance in nearly all installations. Try it first. Do not change setting unless there is evidence of need to do so. Unlike conventional anticipators, this setting is not determined by current draw. There is no need to measure, know, or compensate for current. TO ADJUST: 1. Enter configuration mode (if not already there). 2. Use up and down buttons to display A 3. Press MODE button once to display current value. 4. Use up and down buttons to move between values. 5. Press MODE button to return to A. Up and down buttons now move between option choices A, d-, etc. or press FAN button to exit configuration mode. d. FAHRENHEIT/CELSIUS Selection This selection operates the thermostat in either Fahrenheit or Celsius. TO SELECT: 1. Enter configuration mode (if not already there). 2. Use up and down buttons to display d 3. Press MODE button once to display current selection of F or C. 4. Use up and down buttons to change between F and C. 5. Press MODE button to return to d. Up and down buttons now move between option choices ; or press FAN button to exit configuration mode. Fn. G (FAN) ON WITH W (HEAT) Selection This selection determines whether the G (fan) output is to be ON or OFF when the W (furnace or strip heat) output is ON. Most furnaces and fan coils manage their own blowers and do not require a separate G signal. For these applications, select OFF. Some auxiliary heaters require a separate G signal to turn on the blower. In this case, select ON. TO SELECT: 1. Enter configuration mode (if not already there). 2. Use up and down buttons to display Fn3. Press MODE button once to display current selection of ON or OFF. 4. Use up and down buttons to change between ON and OFF. 5. Press MODE button to return. Up and down buttons now move between option choices or press FAN button to exit configuration mode. r. O (RVS) On with Heat or Cool Selection This selection is only available on heat pump thermostats. This selection determines whether the reversing value is energized in heating or cooling. TO SELECT: 1. Enter configuration mode (if not already there). 2. Use up and down buttons to display r3. Press MODE button once to display current selection of 'H' for energized in heating or 'C' for energized in cooling. 4. Use up and down buttons to change between 'H' and 'C'. 5. Press MODE button to return . Up and down buttons now move between option choices or press FAN button to exit configuration mode. oF. ROOM TEMPERATURE OFFSET ADJUST Selection The selected number is the number of degrees, plus or minus, which will be added to the actual temperature. The numbers can range between -5 and +5. Factory default is 0. This adjusted value will be used as actual temperature for both display and control action. The effect is that a positive number selection will make the room temperature lower, and vice versa. The
thermostat is calibrated within an accuracy of plus or minus 2 degrees when shipped from the factory; this adjustment will provide the best accuracy when set to 0. TO SELECT: 1. Enter configuration mode (if not already there). 2. Use UP and DOWN buttons to display oF. 3. Press MODE button once to display offset value. 4. Use UP and DOWN buttons to select a value between -5 and 5. 5. Press MODE button to return to oF. UP and DOWN buttons now move between option choices; or press FAN button to exit configuration Mode.
OPERATING MODE – H/C or HP operation The selected mode (H/C or HP) will operate the thermostat as a Heat Cool or as a Heat Pump thermostat. TO SELECT: 1. Enter configuration mode (if not already there). 2. Use UP and DOWN buttons to display oP. 3. Press MODE button once to display operating mode. 4. Press UP and DOWN buttons to change operating mode. 6. Press MODE button to return to oP. UP and DOWN buttons now move between option choices; or press FAN button to exit configuration Mode.
IV. CHECK THERMOSTAT OPERATION 1. Fan Operation A. Press fan button, starting fan operation. Fan annunciator turns on. B. Press Fan button, stopping fan operation. Fan annunciator turns off. 2. Heating Operation A. Press and Release MODE button until HEAT is displayed. B. Press up button until LCD readout reads 10 degrees above room temperature. Heating system should begin to operate within 5 minutes. C. If there is a Demand for Second Stage Heat and the Outdoor Thermostat Allows for Staging of Heat, the Red Light will Illuminate to Indicate that a Demand Exists for Additional Heating. 3. Cooling Operation A. Press and Release MODE button until COOL is displayed B. Press down button until LCD readout reads 10 degrees below room temperature. Cooling system should begin to operate within 5 minutes. V.
1. TEMPERATURE DISPLAY The thermostat will display room temperature until the UP or DOWN button is pressed. The word SET appears when these buttons are pressed and the current set point is displayed. If no buttons are pressed for 5 seconds, the display will change back to show room temperature. 2. TIMEGUARD TIMER A 5-minute timeguard is built into the thermostat immediately upon power up, and any time the compressor turns off. The compressor will not turn on until the timeguard has expired. Pressing UP and FAN buttons simultaneously will override the timeguard for 1 cycle. 3. CYCLE TIMER In normal heating and cooling operation the thermostat will not allow more than 4 equipment cycles per hour (or 1 cycle every 15 minutes). Both the Y and W outputs have a 15-minute timer that starts counting down when the output is turned on, (e.g., if Y output is turned on for 9 minutes and then satisfies, it cannot turn back on for another 6 minutes regardless of demand). However, pressing UP and FAN buttons simultaneously or changing the set point will override the timer for 1 cycle. 4. MINIMUM ON TIMER Once the equipment has turned on, it will remain on for a minimum of 3 minutes regardless of demand. However, the equipment can turn off in less than 3 minutes if a change in set point, or a change in mode occurs. 5. STAGING TIMER The heat pump model thermostat has 2 stage heat capability. In normal operation and provided the outdoor thermostat allows for 2 stage there is a 15-minute delay between the first and second stages of heat. The Y output will energize first, then 15 minutes later, W is allowed to come on if the thermostat determines it is not satisfying the demand. However, if the heating demand is greater than 5 degrees, there will be only a 3minute delay before bringing on W provided the outdoor thermostat allows this operation.
P/N 997-010xxx-x rev 6. ERROR MESSAGES E4 will be displayed if the thermostat has an internal memory failure. If E4 appears, replace the thermostat. - - (two dashes) will be displayed if the temperature cannot properly read the room temperature. If - - appears, replace the thermostat.
HEAT/COOL and HEAT PUMP THERMOSTAT Installation and Start ...
P/N 997-010xxx-x rev
HEAT/COOL and HEAT PUMP THERMOSTAT Installation and Start-up Instructions WARNING: Before installing thermostat, turn off all po...
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