CleaverBrooks ProFire Q Series, Installation Operation & Maintenance

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750-437
Q Series Full Modulation
3-7
Operation
NOTE: for V48A equipped gas trains see 4.2.1 for additional information.
3.4.1 — Leak Test Procedure
Fill the gas train for leak testing (burner will go through startup with the blower running, but the burner is not
intended to be fired at this time as the closed leak-test valve blocks gas to the burner).
1. CONFIRM BURNER IS READY FOR LEAK-TESTING THE GAS TRAIN:
•Set burner control switch to OFF position.
•The AZL displays {OFF}
•CLOSE the main leak test valve [7] entirely.
•Minimize the chance that gas pressure switches will interfere with the initial setup:
Set the low gas pressure switch [3] to the lowest setting.
Set the high gas pressure switch [6] to its highest setting and press its reset.
NOTE: gas pressure switches will be tested and set following the LMV37 commissioning and tuning.
•Set the operating control so burner will run when the burner switch is turned ON.
•Partially open the manual shutoff cock [1].
•Reset the low gas pressure switch if required
Before opening the manual gas shutoff valves, read the regulator instructions carefully. Open the shutoff valve
slowly to allow inlet pressure to build up slowly in the regulator until it is fully pressurized. Opening the shutoff
valve too quickly will damage the regulator.
Do not exceed the regulator pressure ratings.
[1]
[2]
[3]
[4] [5]
[6]
[7]
8A
[8B]
1/2”
45
o
1/2”
45
o
GAS
TRAIN
INLET
TO
BURNER
FIGURE 3-2.
Gas Train Leak Test
! Caution