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3.4. Furnace System Start-Up and Checkout
IMPORTANT
The zone control system power-up must occur at the same time or before the furnace or air handler unit is powered up.
3.4.1. Start-Up the System (All Models)
1. Adjust all thermostat settings so that no demand will occur.
2. Apply power to the zone panel transformer and to the air handler and observe the following: all four diagnostic LEDs will light; then each individual diagnostic LED
will light in sequence; then all four diagnostic LEDs will light and extinguish.
3. Finally,thestatuslightwillbegintoash,indicatingproperoperation.Performgasheatingchecks.
3.4.2. Checkouts
3.4.2.1. Typical Gas Heating Checkout (Single Zone)
Prerequisites: Zone 1 thermostat set to heat.
OUTPUT STATUS LEDs
DAMPER 2,3,4 ON
DAMPER 1 OFF
(W) RED ON
HEATING ON
FAN ON
W1 ON
1. Set zone 1 thermostat for a heat demand; check:
• Zone 1 thermostat W LED on (heating demand).
• Damper LED 1 off (damper open).
• Damper LEDs 2, 3, and 4 on (dampers closed).
• Output Heat W1 LED on (furnace on).
• 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
after the combustion cycle has begun. .
2. When 100ºF warm air is sensed by the discharge air sensor, the fan LED will light
and the blower will slowly increase 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:
• Zone 1 thermostat W LED off (no heat demand).
• Output Heat W1 LED off.
• Fan LED off.
• Heating LED off.
• Damper LEDs 2-4 remain on until after 3-1/2 minute purge; then off.
Tochecktheamountofairbeingdeliveredtoeachzoneandtoconrmthateach
individual zone damper functions properly, repeat these steps for zones 2 - 4.
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