Heat Pump Thermostat Installation and Start-up

P/N 997-010070-7 Rev A
CXMConnection to CXM controlOGRCLGOAL1CFault LED24 Vac HotReversing ValveFan24 VacC
Heat Pump Thermostat
Installation and Start-up Instructions
NOTE:
Read all instructions before starting the installation.
4.553.30Selects System Mode: OFF. HEAT, COOL, EMHEATor AUTOIncreaseTemperatureDecreaseTemperatureTurns Continuous FanOn or OFF0.8
2.
DXMConnection to DXM controlOGRCLGO/W2AL1CFault LED24 Vac HotReversing ValveFan24 Va
2.3753.2752.6251.587
SAFETY CONSIDERATIONS
Improper wiring or installation may damage thermostat. Wiring must
conform to local and national electrical codes.
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.
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 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 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 HP (Heat Pump).
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.
Note 1: Optional connection for Heating Stage 2 operation. Thermostat “Y2”
option must be configured as “Y2 = Off”.
Note 2: Connect “W/Y2” thermostat output to “Y2” on the DXM if thermostat
“Y2” option is configured as “Y2 = On” and the desired operation is for 2 stages
of compressor with no electric heat. Connect “W/Y2” thermostat output to “W1”
on the DXM if thermostat “Y2” option is configured as “Y2 = Off” and the
desired operation is for 1 stage of compressor with electric heat for Heating stage
III SET THERMOSTAT CONFIGURATION
While in configuration mode, ELEVEN option choices can be made:
A
Anticipator Value Adjustment
d
Display temperature Fahrenheit/Celsius Selection
Fn Fan on with W (Emergency Heat)
r
Reversing Valve on with Clg or Htg.
oF. Offset Adjustment for Room Temperature
Y2 Set Y2 on for two stage heat pump
AS Auto change over selected
db Dead band setting for auto Temperature settings
EF Extended fan operation with Y
dt Display Temperature of set point
Cr Cycle Rate, Cycles per hour
SS Safety Settings
TO ENTER THE CONFIGURATION MODE:
Press and hold the FAN button for approximately 10 sec until room
temperature disappears and the display reads “A
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.
IN CONFIGURATION MODE, THE FOLLOWING OPTIONS ARE
AVAILABLE:
A. 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 equipment cycles per hour than is set in
Cr, 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 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. The factory default is
OFF.
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 to 4-. 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.
The factory default is “C” for energized in cooling.
TO SELECT:
1. Enter configuration mode (if not already there).
2. Use up and down buttons to display r
3. 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 to r. 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.
Y2. Y2 or W output. (Single or Two Stage Heat Pump)
This selection allows the Y2/W output to be selected as Second Stage
compressor output (Y2=On) or Heating Stage 2 with electric heat output
(Y2=Off). If Y2= On, then Y2/W will turn on when there is a demand for
second stage compressor, whether heating or cooling. If Y2= Off, then
Y2/W will turn on when there is a demand for second stage heating.
TO SELECT:
1. Enter configuration mode (if not already there).
2. Use up and down buttons to display Y2
3. Press MODE button once to display current selection of OF or On.
4. Use up and down buttons to change.
5. Press MODE button to return to Y2. Up and down buttons now move
between option choices or press FAN button to exit configuration mode.
AS. Auto Change over select
This selection allows the thermostat to be configured as Auto changeover or
manual changeover. When in Manual changeover mode (AS=Off), the
“Auto” icon on the display will NOT be an available option.
TO SELECT:
1. Enter configuration mode (if not already there).
2. Use up and down buttons to display aS
3. Press MODE button once to display current selection of OF or On.
4. Use up and down buttons to change.
5. Press MODE button to return to aS. Up and down buttons now move
between option choices or press FAN button to exit configuration mode.
db. Dead band Set for AUTO Mode
This selection selects the minimum difference between the heating setpoint
and the cooling setpoint. This will be used when the thermostat is configured
for Auto changeover mode.
TO SELECT:
1. Enter configuration mode (if not already there).
2. Use up and down buttons to display db
3. Press MODE button once to display current selection 1 to 4.
4. Use up and down buttons to change.
5. Press MODE button to return to db. Up and down buttons now move
between option choices or press FAN button to exit configuration mode.
EF. Extended fan operation with Y selection
This selection enables extended fan operation when Y turns off. The fan will
run for 90 seconds after Y turns off.
TO SELECT:
1. Enter configuration mode (if not already there).
2. Use up and down buttons to display EF
3. Press MODE button once to display current selection of OF or On.
4. Use up and down buttons to change.
5. Press MODE button to return to EF. Up and down buttons now move
between option choices or press FAN button to exit configuration mode.
dT. Display Temperature
If dt=On, then the actual room temperature is displayed. If dt=Off, then the
temperature setpoint is displayed.
TO SELECT:
1. Enter configuration mode (if not already there).
2. Use up and down buttons to display dT
3. Press MODE button once to display current selection of OF or On.
4. Use up and down buttons to change.
5. Press MODE button to return to dT. Up and down buttons now move
between option choices or press FAN button to exit configuration mode.
Cr. Cycle Rate Selection
This selection selects the cycle rate maximum in cycles per hour.
TO SELECT:
1. Enter configuration mode (if not already there).
2. Use up and down buttons to display Cr
3. Press MODE button once to display current selection 3 to 6.
4. Use up and down buttons to change.
5. Press MODE button to return to Cr. Up and down buttons now move
between option choices or press FAN button to exit configuration mode.
SS. Safety SetPoint Selection
This selection enables or disables the safety setpoint limits feature. If SS =
On, then if the room Temperature goes beyond the Safety Setpoint limits (50F
for heating and 90F for Cooling), then the Heat Pump will run even if the
thermostat is in the OFF mode. If SS= Off, then the heat pump will not run in
the above situation.
TO SELECT:
1. Enter configuration mode (if not already there).
2. Use up and down buttons to display SS
3. Press MODE button once to display current selection of OF or On.
4. Use up and down buttons to change.
5. Press MODE button to return to SS. 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
and the HEAT icon will flash.
C. If there is a Demand for Second Stage Heat the second stage will turn
on after a delay and the HEAT icon will flash faster.
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
and the COOL icon will flash.
C. If the install mode option is set to Y2=ON, the second stage COOL will
come on after a delay and the COOL icon will flash faster.
4. Auto Change Over Operation
A. Press and Release MODE button until AUTO is displayed
B. Press DOWN button. LCD readout reads The set temperature and the
mode set. Press the MODE button to switch between AUTO HEAT and
AUTO COOL settings and use the UP and DOWN buttons to select the
temperature setting. The LCD will display SET and The COOL or
HEAT label for the setting being changed. The AUTO COOL
temperature MUST be set above the AUTO HEAT setting to keep the
system from cycling between HEAT and COOL. The degree of
difference depends on the setting in the Install mode. The thermostat
will automatically make this adjustment.
Emergency Heating Operation
A. Press and Release MODE button until EMHEAT is displayed.
B. Press up button until LCD readout reads 10 degrees above room
temperature. Heating system should begin to operate within 5 minutes
and the EMHEAT icon will flash.
V.
1.
2.
3.
4.
5.
THERMOSTAT OPERATION
TEMPERATURE DISPLAY
The thermostat will display room temperature or setpoint, depending
on the Install mode option selected. When the UP or DOWN button is
pressed, the setpoint will always be displayed. The word SET appears
when these buttons are pressed and the current set point is displayed.
In Auto change mode, the mode being set (HEAT or COOL) will also
appear. If no buttons are pressed for 5 seconds, the display will
change back to show room temperature.
TIMEGUARD TIMER
A 3-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.
CYCLE TIMER
In normal heating and cooling operation the thermostat will not allow
more equipment cycles per hour than is set in the Install mode.(3 - 11)
Both the Y and Y2/W outputs have a timer that starts counting down
when the output is turned on. The next cycle can not start until the
timer is satisfied. However, pressing UP and FAN buttons
simultaneously or changing the set point will override the timer for 1
cycle.
MINIMUM ON TIMER
Once the equipment has turned on, it will remain on for a minimum of
2 minutes regardless of demand unless there is a change in set point, or
a change in mode.
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.
Copyright © ClimateMaster, Inc. 2002