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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White Rodgers 50a55-286 Operating Temperature Range, Humidity Range, Mounting, Timing Specifications

50a55-286 specifications

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