Operation
3-8
750-437
Q Series Full Modulation
2. TURN THE BURNER SWITCH ON.
If the burner blower does not start:
If the display continues to show {OFF} with the burner switch ON, then close the manual shutoff cock [1].
Troubleshoot the limit circuit and correct the situation so that the AZL “Heat request from controllers” LCD
bar beneath the icon turns solid with when the burner switch is turned ON. Repeat from Step 1.
If the burner blower starts:
The burner will progress and display the following stages:
{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}
= Interval 1
As the closed leak test valve [7] is blocking fuel delivery, the LMV37 will not detect flame during its trial for
main flame and will safety shutdown with the burner panel's red failure light illuminated. The LMV3 safety
shutdown should de-energize/close both safety shutoff valves [4] and [5]. If a safety-shutoff valve fails to
close, close the manual shutoff valve [1]. Do not proceed further until you correct the problem. If [4] and [5]
closed, pressurized gas should be trapped between [4] and [7] and you may proceed to the next step.
3. LEAK TEST THE DOWNSTREAM SAFETY SHUTOFF VALVE [5].
Release the gas trapped between and main gas safety shutoff valve [5] and manual cock [7] by opening the
leak test cock [8B]. After the trapped gas has been vented, continue to perform a bubble test for any leakage
through the safety shutoff valve [5]. Bubbles will appear if gas is leaking past [5]. If bubbles continue, close
the main shutoff valve [1], correct the valve [5] problem and retest 10 times before proceeding. If no leak,
close test cock [8B] and continue to the next step.
4. LEAK TEST THE UPSTREAM SAFETY SHUTOFF VALVE [4].
Release gas pressure at test cock [8A] and bubble test for any leaking through auxiliary safety shutoff valve
[4]. If you do not observe a leak, close test cock [8A] and go to the next step. If safety shutoff valve [4] leaks,
correct the problem and retest 10 times before proceeding.
Procede only when it is established there are no gas leaks.
FIGURE 3-3.
Request for Heat
Содержание ProFire Q Series
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