Alliance Laundry Systems 602004144 Benutzerhandbuch

Operating Instructions

70400101 (EN)

Ignition Control Operation for Non-
CE Models

Power Up
When power is applied to the ignition control, the

control will begin the ignition sequence within 1 – 3

seconds prepurge waiting time.
Ignition Sequence
The control begins the ignition sequence after

prepurge by powering the ignitor and opening the gas

valve. The ignitor will remain on either until a flame is

sensed or until a maximum of ten (10) seconds

(10 +0/-4 sec) has elapsed. If a flame is established

and lost during the 10 second period, the ignitor will

be powered up again in an attempt to re-ignite the gas.
If no flame is detected within the ten (10) second

ignition sequence, the control will terminate power to

the gas valves, ignitor, and enter lockout within 5

seconds.
Normal Operation
Once a flame has been established, the spark ignitor

will stop sparking and the control will continually

monitor all inputs. If the controller senses a loss of

flame after flame is established, the gas valve will

remain energized and sparking will commence within

one second of the flame loss. If flame reattempt fails,

lockout will occur within 11 seconds of initial flame

loss.
Termination of Flame
Normal flame termination occurs when the thermostat

has been satisfied, meaning there is no immediate need

for more heat. The thermostat will disconnect power

from the ignition control, which will cause the gas

valve to close and the flame to go out. After a short

period of time, not less than 1 second, the thermostat

will cool down and close causing power to be

reapplied to the ignition control. When this occurs, the

control must complete the same prepurge and ignition

sequence specified above.

Control Lockout
When the control locks out, the gas valve will be

closed and all requests for heat will be ignored. The

lockout mode may only be discontinued by

interrupting power to the control or cycling the

thermostat. After this occurs, the control will restart

with its normal power up and ignition sequence.
Low Voltage Detection
Low Voltage Detection The control will have

capability for detection of a low voltage input

condition. If input voltage on power up is below

19.0VAC +0.8VAC/-0.5VAC, the control will disable

output to gas valve control relay. If input voltage rises

above 19.8VAC for at least three (3) seconds, the

control will then re-enable function of the gas valve

control relay and ignition sequence may begin. On

powerup, the control function must always be disabled

if greater than 19.8VAC.