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505023M 04/06
Gas Heating Checkout − Single Zone
Prerequisites:
S
Zone 1 thermostat set to Heat
OUTPUT STATUS LEDs
DAMPER 2,3,4 on
DAMPER 1 Off
W1 on
(W) RED on
hEATING on
fan on
1. Set zone 1 thermostat for a heat demand; check:
D
Zone 1 thermostat W LED on (heating demand).
D
Damper 1 LED off (damper open).
D
Damper 2, 3, and 4 LEDs on (dampers closed).
D
Output Heat W1 LED on (furnace on).
D
Heating LED on.
The furnace begins ignition sequence after zone 1 has
demanded heat. The zone control system will start the
furnace blower on low speed (0 PIAB) 45 seconds af-
ter the combustion cycle has begun.
2. When warm air is sensed by the discharge air sensor,
the fan LED will light and the blower will slowly in-
crease to speed required by the zone calling. The
blower operates at speed setting of PIAB jumper for
zone 1 and the jumper for heating air reduction. It may
require 60 − 90 seconds to reach this speed.
3. Set zone 1 thermostat for NO heat demand; check:
D
Zone 1 thermostat W LED off (no heat demand).
D
Output Heat W1 LED off.
D
Fan LED off.
D
Heating LED off.
D
Damper LEDs 2−4 remain on until after 3
-1/2
min-
ute purge; then off.
To check the amount of air being delivered to each
zone and to confirm that each individual zone damper
functions properly, repeat these steps for zones 2 − 4.
Gas Heating Checkout − Multiple Zone
Prerequisites:
S
All zone thermostats set to Heat
OUTPUT STATUS LEDs
DAMPER 2,3,4 OFF
W1 on
(W) RED on
hEATING on
fan on
1. Set all zone thermostats for a heat demand; check for
the following:
D
All zone thermostat W LEDs on (heat demands).
D
LEDs dampers 1 − 4 off (all dampers open).
D
Output Heat W1 LED on (furnace on).
D
Heating LED on.
The furnace begins ignition sequence after a heat de-
mand is detected. The zone control system will start
the furnace blower on low speed (0 PIAB) 45 seconds
after the combustion cycle has begun.
2. When warm air is sensed by the discharge air sensor,
the fan LED comes on and the blower will slowly in-
crease to speed required by the zones calling. The
blower operates at a speed equivalent to the sum of all
zone PIAB jumpers but at a maximum not to exceed
the setting of the heating air reduction jumper. It may
take the blower 60 to 90 seconds to reach this speed.
3. Set all zone thermostats for NO heat demands; check:
D
Output Heat W1 LED off.
D
Heating LED off.
D
Fan LED off (blower turns off after delay).
D
All zone thermostat W 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).