Check Thermostat Operation - Carrier Programmable Dual Fuel Thermostats Installation, Start-Up, And Operating Instructions Manual

1-SPEED HEAT PUMP
Fan
Cool
HP Heat
Furnace Lo
Furnace Hi
TO SELECT:
1. Enter configuration mode if not already there. See above. Use
up and down buttons to make small (now flashing) display
indicate 13.
2. Press SET TIME/TEMP button once to flash large display.
3. Use up and down buttons to move between -5 and +5 in 1°
steps on large display. Factory default is 0.
4. Press SET TIME/TEMP button again to flash upper small
display for selection of another option, or press END to exit
configuration mode.
Option 15—Enable Auto Mode
This option allows the installer to enable or disable AUTO mode
(automatic changeover between heat and cool). When disabled,
AUTO icon does not appear when successive presses of MODE
button are used to move between OFF, HEAT, COOL, and
EHEAT (in heat pump systems). Factory default is ON (AUTO
enabled).
TO SELECT:
1. Enter configuration mode if not already there. See above. Use
up and down buttons to make small (now flashing) display
indicate 15.
2. Press SET TIME/TEMP button once to flash large display.
3. Use up or down button to move between ON and OF on large
display. Factory default is ON (AUTO enabled).
4. Press SET TIME/TEMP button again to flash upper small
display for selection of another option or press END to exit
configuration mode.
→
Step 5—Check Thermostat Operation
Before doing the checkout, press HOLD button to turn on HOLD
icon, locking the thermostat in hold mode. This will assure set
points do not change during the checkout. Outputs for each stage
of operation are listed in Table 2.
TO TEST FAN:
1. Press FAN button. Fan ON icon and the G output will go on
within a few seconds, causing fan to operate.
2. Pressing FAN button again will turn off the G output and turn
on Fan AUTO icon.
TO TEST COOLING:
Press MODE button until COOL icon under it turns on. Press
down button until cool set point (upper right 2 digit display with
COOL now flashing under it) is 2° or 3° below room temperature.
This will create a cooling demand. A small triangle to the left of
this COOL icon will flash or come on continually. Flashing means
the equipment is going to turn on but is presently being held off by
a system timer. (See "Operational Information" on page 11 for
timer descriptions.) Defeat timer by pressing UP and FAN buttons
together. This will make the triangle stay on and turn cooling
equipment on. To turn off, raise cooling set point above room
temperature. The cooling and the triangle will turn off within a few
seconds.
→ Table 2—Active Outputs for Each Operating State
G
Y/Y2, O/W2, G
Y/Y2, G
W/W1
W/W1, Y1/W2
2-SPEED HEAT PUMP
Fan
Lo Cool
Hi Cool
Lo HP Heat
Hi HP Heat
Furnace
If system has a 2-speed compressor, it will start on low and
proceed to high 15 minutes later due to a staging timer which
requires 15 minutes of low before high comes on. The UP and
FAN buttons cannot be used to defeat this timer. This timer can be
defeated by reducing the set point to more than 5° below room
temperature, bringing on a high speed demand within 5 seconds.
Remember—2-speed units have a 1 minute off time between lo
and high speed, so the thermostat's demand will not show
immediately as a speed change in the outdoor unit. It will show
immediately as an increase in the indoor fan speed.
TO TEST HEAT PUMP HEATING:
Press MODE button until HEAT icon under it turns on. Press up
button until HEAT set point (LOWER right 2-digit display with
HEAT now flashing under it) is 2° or 3° (not more) above room
temperature. This will create a first stage heating demand. A small
triangle to the left of this HEAT icon will flash or come on
continually. Flashing means the equipment is going to turn on but
is presently being held off by a system timer. (See "Operational
Information" on page 11 for timer descriptions.) Defeat timer by
pressing UP and FAN buttons together. This will make the triangle
stay on and turn on the heat pump. To turn off, reduce the heating
set point below the room temperature. The heating and the triangle
will turn off within a few seconds.
If the system has a 2-speed compressor, it will start on low and
proceed to high 15 minutes later due to a staging timer which
requires 15 minutes of low before high comes on. The UP and
FAN buttons cannot be used to defeat this timer. If set point is
raised to more than 5° above room temperature, the staging timer
is defeated and the thermostat will call for high speed heat pump
heating within 5 sec. This is not recommended because once the
demand exceeds 5°, the thermostat may jump to furnace heating at
any time. Use the method below to test the furnace.
TO TEST FURNACE HEATING:
To test, press MODE button until EHEAT icon turns on. This will
allow operation of the furnace only. Raising set point above room
temperature will turn on the furnace. Reducing set point below
room temperature will turn it off.
If the heat pump is single speed and the furnace is 2-stage, the
thermostat can be used to control the second stage. (See Fig. 4, 6,
and 8.) To test second stage, raise set point to more than 5° above
room temperature (defeating 15-minute staging timer). Within 5
sec, the thermostat will bring on the furnace second stage.
6
G
Y1/W2, O/W2, G
Y1/W2, Y/Y2, O/W2, G
Y1/W2, G
Y1/W2, Y/Y2, G
W/W1