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SPECIFICATIONS
ELECTRICAL RATINGS [@ 77°F (25°C)]:
Input Voltage: 25 VAC 50/60 Hz
Max. Input Current @ 25 VAC: 0.455 amp
Relay Load Ratings:
Valve Relay: 1.5 amp @ 25 VAC 50/60 Hz 0.6 pf
Ignitor Relay: 2.0 amp @ 120 VAC 50/60 Hz
(resistive)
Flame Current Requirements:
Minimum current to insure flame detection: 1 µa DC*
Maximum current for non-detection: 0.1 µa DC*
Maximum allowable leakage resistance: 100 M ohms
*Measured with a DC microammeter in the flame probe
lead
OPERATING TEMPERATURE RANGE:
-40° to 175°F (-40° to 80°C)
HUMIDITY RANGE:
5% to 93% relative humidity (non-condensing)
MOUNTING:
Surface mount multipoise
Timing Specs: (@ 60 Hz)
maximum
Flame Establishing Time: 2 sec
Flame Failure Response Time: 2 sec
Gases Approved: Natural, Manufactured, Mixed, Liquid
Petroleum, and LP Gas Air Mixtures are all approved for
use.
TIMING SPECIFICATIONS
(All times are in seconds, unless noted otherwise)
PRE-PURGE
TRIAL FOR IGNITION
PERIOD
IGNITION ACTIVATION
PERIOD
RETRIES
VALVE SEQUENCE
PERIOD
INTERPURGE
POST-PURGE
LOCKOUT TIME
HEAT DELAY-TO-FAN-ON
HEAT DELAY-TO-FAN-OFF*
COOL DELAY-TO-FAN-ON
COOL DELAY-TO-FAN-OFF
IGNITOR WARM-UP
HUMIDIFIER
ELECTRONIC AIR
CLEANER
15
4
4
4 times
12
15
5
122
45
60/90/
120/180
0
0
20
YES
YES
50A62-820
* This time will vary depending on option
switch position. The control is factory-set
at 60 sec. heat delay-to-fan-off. See
OPERATION section for further
information.