White Rodgers 50a55-286 Specifications, Flame Current Requirements, Operating Temperature Range

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, Liquid Petroleum, and LP Gas Air Mixtures are all approved for use.

TIMING SPECIFICATIONS

(All times are in seconds, unless noted otherwise)

	50A55-286
PRE-PURGE	0
INITIAL IGNITOR	17
RETRY IGNITOR	28
IGNITION ACTIVATION	5
PERIOD
TRIAL FOR IGNITION	7
PERIOD
RETRIES	2 times
VALVE SEQUENCE	21
PERIOD
INTERPURGE	15
POST-PURGE	15
LOCKOUT TIME	200
DELAY TO HEAT ON	30
DELAY TO HEAT OFF*	60/90/
	120/180
DELAY TO COOL ON	0
DELAY TO COOL OFF	45
AUTO RESET	60 minutes
HUMIDIFIER	YES
ELECTRONIC AIR	YES
CLEANER

*This time will vary depending on option switch position. The control is factory-set at 60 sec. delay to heat off. See OPERATION section for further information.

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