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SPECIFICATIONS
ELECTRTCAL RATTNGS a@ 77"F (25.C)l:
Input Voltage: 25 VAC 50/60 Hz
Max. Input Current @ 25 VAG: 0.45 amp
Relay Load Ratings:
Valve Relay:
1.5 amp @ 25 VAC 50/60 Hz 0.6 pf
lgnitor Relay: 6.0 amp @ 120 VAC 50/60 Hz
(resistive)
lnducer Relay:
2.2FLA-3.5 LRA @ 120 VAC
Circulator Relay: 14.5 FLA-25.0 LRA @ 120 VAC
Flame Current Requirements:
Minimum current to insure flame detection: 1 ua DC*
Maximum current for non-detection: 0,1 pa DC-
Maximum allowable leakage resistance: 100 M ohms
-Measured with
a DC microammeter in the flame orobe lead
OPERATING TEMPERATURE RANGE:
-40' to 175'F (-40" to 80"C)
HUMIDITY RANGE:
5"/" to 93y" relative humidity (non-condensing)
M O U N T I N G :
Surface mount multipoise
Timing Specs: (@ 60 Hz..)
Flame Establishing Time:
maximum
0.8 sec
TIMING SPECIFICANONS
(Alltimes are in seconds, unless noted otherwise)
50A55-843
P R E - P U R G E
30
I N I T I A L I G N I T O R W A R M . U P
(1st 64 attempts)
1 7
M I N I M U M I G N I T O R W A R M -
U P
5
M A X I M U M I G N I T O R W A R M -
U P
21
IGNITION ACTIVATION
PERIOD
TRIAL FOR IGNITION
P E R I O D
4
RETRIES
2 t i m e s
V A L V E S E Q U E N C E P E R I O D
1 2
I N T E R P U R G E
60
P O S T . P U R G E
1 5
L O C K O U T T I M E
300
HEAT DELAY-TO-FAN-ON-
3 0 , 4 5
HEAT DELAY-TO-FAN-OFF-
60/90/
120/180
COOL DELAY.TO.FAN-ON
5
COOL DELAY-TO-FAN-OFF'
45. 90
AUTO RESET
60 minutes
H U M I D I F I E R
Y E S
ELECTRONIC AIR CLEANER
Y E S
- 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.
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.
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