WIND-O-WARM SEQUENCE OF OPERATION
STEP #
1) Thermostat calls for heat.
2) Draft Inducer turns on.
3) Pressure switch closes.
4) Spark ignition begins.
5) Gas flow to burner.
6) Burner ignition proven.
7) Circulating Blower on.
8) Heater burns through heating cycle.
9) Thermostat satisfied.
10) Gas flow off to burner.
11) Draft inducer off.
12) Circulating Blowers off.
13) Heater in stand-by.
NOTE: IF THERE IS A MALFUNCTION IN STEPS 3, 5, 6 THE OPERATION SEQUENCE WILL STOP AT THAT
POINT. FOR STEPS 5 OR 6, IF AFTER 2 ADDITIONAL ATTEMPTS MALFUNCTION STILL OCCURS, THE CON-
TROL WILL LOCK OUT FOR ONE HOUR. FOR PURPOSE OF TESTING, THE ONE HOUR LOCKOUT CAN BE
OVERRIDDEN BY RESETTING THE THERMOSTAT OR INTERRUPTING THE ELECTRICAL POWER.
Page 16
!
Pressure switch
closes proving
inducer
Heater
in
stand-
by
Thermostat
calls for
heat
Power
on to
draft
inducer
Pressure
switch
closes
inducer
proved
Spark
ignition
energized
Gas
valve
opens
gas
flow to
burner
Burner
flame
proved
Blower
on
Heat
cycle
Thermostat
satisfied
!! !
!
!!!!! ! ! ! !
Gas
valve
closes
gas flow
to burners
off
Draft
inducer
off
Blower
off
Heater
in
stand-
by

!!

Inducer
continues to
run

!

One Hour
Lock Out

!

15 Sec.
inter
purge
3 Attempts
for ignition

!

!
!
!
30 Sec. 180 Sec.
90 Sec.
4 Sec.
NONO
YES
YES
NO
NO
YES
YES