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505023M 04/06
Heat Pump Heating Checkout − Multiple Zone
Prerequisites:
S
All zone thermostats set to Heat
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
ELECTRIC hEATING on (W/EVENT 3)
1. Apply heating demand to all thermostats.
D
All zone thermostat W LEDs on (heat demands).
D
Output Heat LED Y1 on (compressor).
D
Heating and Fan LEDs on.
D
LEDs dampers 1 − 4 off (all dampers open).
D
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 accord-
ing 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
−
charge air sensor continually samples air tempera-
ture. If, after 4 minutes, air temperature is not warming
significantly, the high speed compressor energizes.
D
Output Heat Y2 LED on (high speed compressor).
3. The discharge air sensor continually samples air tem-
perature. If, after (another) 4 minutes, air is not warm-
ing significantly, auxiliary heat sequence begins:
D
Electric Heating (E−Heating) LED on.
D
Output Heat W1 on, followed by (if available, and if
necessary) W2, and then W3.
4. Remove the heat demand from all zones.
D
Input LEDs off.
D
Fan LED off (Blower off).
D
Heating LEDs off.
D
DamperLEDs − Last zone thermostat demand re-
moved: LED is off (this zone’s damper remains
open during 3−1/2 minutepurge); 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).
Heat Pump Heating Checkout − Central Control
Prerequisites:
S
Central mode switch on
S
Red LED on the central mode fan switch on
OUTPUT STATUS LEDs
(W) RED on
DAMPER 2,3,4 OFF
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
ELECTRIC hEATING on (W/EVENT 3)
central mode On
1. Set zone 1 thermostat for a heat demand; check:
D
Zone 1 thermostat W LED on (heating demand).
D
Output Heat Y1 LED on (compressor on).
D
Heating LED on.
D
All damper LEDs off (dampers open).
D
Pressure Switch LED on.
The outdoor-unit compressor begins operating in the
heating mode (low−speed if 2-stage compressor). At
approximately the same time, the indoor blower starts,
operating at a speed according to the PIAB jumper set-
tings for all zones. It may take the blower 60 to 90 sec-
onds to reach this speed.
2.
If Single-Stage Heat Pump
−
charge air sensor continually samples air tempera-
ture. If, after 4 minutes, air temperature is not warming
significantly, the high speed compressor energizes.
D
Output Heat Y2 LED on (high speed compressor).
3. The discharge air sensor continually samples air tem-
perature. If, after (another) 4 minutes, air is not warm-
ing significantly, auxiliary heat sequence begins:
D
Electric Heating (E−Heating) LED on.
D
Output Heat W1 LED on, followed by (if available,
and if necessary) W2, and then W3.
4. Remove the heat demand from zone 1. Upon removal
of the demand from zone 1, check:
D
Zone 1 thermostat W LED off (no heat demand).
D
Output Heat Y1, (Y2) LED(s) off.
D
Fan and Heating LEDs off.