51
5.2.3.2. Typical Dual Fuel Gas Heating (Multiple Zone)
Prerequisites:
Zone 1 thermostat set to Heat.
• Balance Point Sensor set at higher temperature than outdoor BPS-sensed
temperature (red balance point sensor LED on) or
• Balance Point Sensor inputs jumpered to simulate cold outdoor temperature
below balance point (red balance point sensor LED on).
.
OUTPUT STAT US LEDs
DAMPER 2,3,4 OFF
(W) RED ON
HEATING ONFAN ON
W1 ON
1. Set all zone thermostats for a heat demand; check:
• All zone 1 thermostat W LED on (heating demand).
• Damper LED 1 - 4 off (all 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 a heat demand 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 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 all zone thermostats for NO heat demand; check:
• Output Heat W1 LED off.
• Heating LED off.
• Fan LED off (blower turns off after delay).
• All zone thermostat W 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).
To Next Page
Loading...
Need help?
General
