White Rodgers 50A65-843 User Manual

2

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:

2.0 amp @ 120 VAC 50/60 Hz
(resistive)

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

-40° to 175°F (-40° to 80°C)

5% to 93% relative humidity (non-condensing)

Surface mount multipoise

Timing Specs: (@ 60 Hz**)

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

(All times are in seconds, unless noted otherwise)

PRE-PURGE

IGNITOR WARM-UP

IGNITION ACTIVATION 
PERIOD

TRIAL FOR IGNITION 
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*

AUTO RESET

HUMIDIFIER

ELECTRONIC AIR CLEANER

30

20

1

4

2 times

12

60

15

300

30, 45

60/90/ 

120/180

5

45, 90

60 minutes

YES

YES

50A65-843

* These times will vary depending on 

option switch position. The control is 
factory-set at 30 seconds heat delay-
to-fan-on, 180 seconds heat delay-to-
fan-off and 45 seconds cool delay-to-
fan-off. See OPERATION section for 
further information.