Operation
3-14
750-437
Q Series Full Modulation
B) Advance control to standby PH12
From the
{400: Set}
screen, press
(
enter)
and the control displays:
{run}
Press
(
enter)
again and the control displays:
{Ph12}
= Standby
Test P0 Ignition Point
Turn the burner switch ON. The burner progresses through pre-ignition phases and trial for flame:
{Ph22}
= Fan motor on
{Ph24}
= Traveling to pre-purge position
{Ph30}
= Pre-purge countdown timer (30 sec)
{Ph36}
= Traveling to ignition position
{Ph38}
= Pre ignition Time
Burner light off attempt at factory P0 setting
{Ph40}
= 1st Safety Time (ignition transformer ON)
{Ph42}
= 1st Safety Time (ignition transformer OFF)
{Ph44}
= Pilot stabilization
If light off is successful, go to step
e
. Otherwise, continue to
c
.
C) Failed ignition - Reset LMV
Following a failed light off attempt, the burner locks out and displays alternating error/fault messages:
{Loc:c: X}
and
{Loc:d: Y}
Turn burner switch
OFF
Press
(reset)
until display shows
{rESET}
The control sequences to
{Ph 10}
home run, then
{OFF}
NOTE:
The fan speed is measured in percentage. The gas metering valve is measured in degrees open. At P0 light off:
The Q-burner-fan speed should be approximately 20-30%
The gas-metering-valve angle should be between 2 - 12° open.
Tuning the P0 point may require repeated efforts to ignite the flame and find the required gas/air mix for consistent, sta-
ble ignition. If the burner fails to light, turn the burner switch off before resetting the control so you have the opportunity
to adjust the P0 setting.
In the sequence below, the burner executes trial for ignition/main flame during PH42 and PH44.
Содержание ProFire Q Series
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