SEQUENCE OF OPERATION
Thermostat calls for heat
â | Power to Draft | â | Pressure | â |
(VentorInducerMotor) | Switch(Fan Proved)Closes | |||
|
|
|
|
|
NO
â | Lockout |
after 3 | |
| attempts |
|
|
Spark Ignition
Energized
â
â
Gas control
valve opens gas flow to burner
â
15 Sec. |
|
Ignition | â |
Proved |
NO
Heating Cycle
â
Thermostat satisfied
â
Gas control valve closes
â
20Sec.
Post Purge
Draft
inducer off
â
Page 15
STEP #
1)Thermostat calls for heat.
2)Inducer turns on.
3)Pressure switch closes.
4)Power to ignitor.
5)Gas flow to burner.
6)Burner ignition proven.
NOTE: If there is a malfunction in any of the above steps, the sequence will stop at that point and return to Step 2. If after 3 attempts malfunction still occurs, control will go into lockout mode for one hour. This one hour lockout can be bypassed by resetting the thermostat, or interrupting power.
7)Thermostat satisfied.
8)Gas valve closes.
9)Inducer turns off.
HEATER IS NOW IN STANDBY MODE.
