Amana GUCA Installation Instructions Manual page 37

CIRCULATOR
BLOWER
GAS VALVE
CLOSED
IGNITER
CLOSED
PRESSURE SWITCH
CONTACTS
INDUCED DRAFT
BLOWER
THERMOSTAT
SECONDS
Indoor Fan
OFF
Outdoor Fan
and
Compressor
OFF
Thermostat
OFF
Seconds
Timing Chart for Normal Heating Mode
ON
OFF
OPEN
ON
OFF
OPEN
ON
OFF
ON
OFF
0
IGNITER
WARM UP PERIOD
(see note)
NOTE: WHITE-RODGERS 50A55 or 50T55 INTEGRATED CONTROL MODULE
HAS A VARIABLE STANDARD IGNITER WARM UP PERIOD BETWEEN
A 17-SECOND MAXIMUM AND A FIVE-SECOND MINIMUM.
WHITE-RODGERS 50A65 INTEGRATED CONTROL MODULE
HAS A 20-SECOND IGNITER WARM UP PERIOD (SILICON NITRIDE).
Timing Chart for Normal Cooling Operation
ON
ON
ON
0 5
t t
circ
ign
FIXED HEAT
ON DELAY:
30 SECONDS
37
60,90,
0
15
120 or
180
[
WR50T55
HAS A FIXED
90-SECOND
OFF DELAY
0 45