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2.3.2.2. Typical Heat Pump Heating Checkout (Multiple Zone)
Prerequisites
: All zone thermostats set to heat.
ELECTRIC HEATING ON (W/EVENT 3)
OUTPUT STATUS LEDs
DAMPER 2,3,4 OFF
(W) RED ON
PRESSURE
SWITCH LED ON
EVENT SEQUENCE:
1- Y1 ON
2- Y2 (IF EQUIPPED) ON
IF NO SIGNIFICANT
WARMING AFTER 4 MIN.
3- W1 ON IF NO
SIGNIFICANT WARMING
AFTER 4 MIN; THEN W2;
THEN W3
HEATING ON
FAN ON
1.
Apply heating demand to all thermostats.
• All zone thermostat
W
LEDs on (heat demands).
• Output Heat LED
Y1
on (compressor).
• Heating and Fan LEDs on.
• LEDs dampers 1 - 4 off (all dampers open).
• Pressure Switch LED on.
The compressor in the outdoor unit begins operating in the heating mode. At
approximately the same time, the indoor blower starts, operating at a speed
according to the PIAB jumper settings for all zones. It may take the blower 60
to 90 seconds to reach this speed.
2.
If Single-Stage Heat Pump - skip to step 3. The discharge air sensor
continually samples air temperature. If, after four minutes, air temperature is
not warming significantly, the high speed compressor energizes. Output Heat
Y2
LED on (high speed compressor).
3.
The discharge air sensor continually samples air temperature. If, after (another)
four minutes, air is not warming significantly, auxiliary heat sequence begins:
• Electric Heating (E-Heating) LED on.
• Output Heat
W1
on, followed by (if available, and if necessary)
W2
, and
then
W3
.
4.
Remove the heat demand from all zones.
• Input LEDs off.
• Fan LED off (Blower off).
• Heating LEDs off.
• Damper LEDs - Last zone thermostat demand removed: LED is off (this
zone’s damper remains open during 3-1/2 minute purge); Other zones
damper LEDs are on during the 3-1/2 minute purge (dampers closed).
After 3-1/2 minute delay, all dampers LEDs go off (dampers open).
Содержание Harmony III
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