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SPECIFICATIONS
ELECTRICAL RATINGS [@ 77°F (25°C)]:
Input Voltage: 25 VAC, 50/60 Hz
Max. Input Current @ 25 VAC: 0.45 amp
Relay Load Ratings:
Valve Relay: 1.5 amp @ 25 VAC, 50/60 Hz, 0.6 pf
Ignitor Relay: 6.0 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: 0.8 sec
Flame Failure Response Time: 2.0 sec
** At 50 Hz, all timing specifications should be increased by
20%.
Gases Approved: Natural, Manufactured, Mixed, Liquefied
Petroleum, and LP Gas Air Mixtures are all approved for use.
TIMING SPECIFICATIONS
(All times are in seconds, unless noted otherwise)
* These times will vary depending on option switch position.
The control is factory-set at 0 sec. delay to cool off and 100
sec. delay to heat off. See OPERATION section for further
information.
PRE-PURGE
TRIAL FOR IGNITION
PERIOD
IGNITION ACTIVATION
PERIOD
RETRIES
VALVE SEQUENCE
PERIOD
INTERPURGE
POST-PURGE
LOCKOUT TIME
DELAY TO HEAT ON
DELAY TO HEAT OFF
DELAY TO COOL ON
DELAY TO COOL OFF
MINIMUM IGNITOR
WARM-UP
MAXIMUM IGNITOR
WARM-UP
INITIAL IGNITOR WARM-
UP (1st 64 attempts)
HUMIDIFIER
ELECTRONIC AIR
CLEANER
0
4
1
2 times
12
60
5
300
45
60/100/
140/180*
2
0/80*
11
21
17
YES
YES
50A55-438