Innovation - Edge [i] Installation, Operation, Maintenance Manual
CHAPTER 5
– SAFETY DEVICE TESTING
OMM-0143_A
• GF
-216
•
9/6/2019
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•
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Low Gas Pressure Fault Test Instructions
Figure 5.2: Low & High Gas Pressure Testing (INN600N
–800N Gas Train Shown)
5.3 HIGH GAS PRESSURE FAULT TEST
To simulate a high gas pressure fault, refer to Figure 5.2 and proceed as follows:
High Gas Pressure Fault Instructions
1.
Put the unit in Manual Mode by going to the
Main Menu
→
Diagnostics
→
Manual Run
and setting the
Manual Mode
toggle to
Enabled
.
2.
Remove the 1/4“ plug from the leak detection ball valve located at the
High Gas Pressure
switch (see Figure 5.2).
3.
Install a
0
– 16” W.C. (0 – 4.0 kPa)
manometer (or
W.C. gauge) where the 1/4” plug was
removed.
4.
Slowly open the leak detection ball valve
5.
Start the unit at a valve position (firing rate) of 25%.
6.
Slowly increase the gas pressure using the adjustment screw on the SSOV.
7.
The unit should shut down and display a
High Gas Pressure
fault message when the gas
pressure exceeds the setting on the high gas pressure switch. The
FAULT
indicator should
also start flashing. The switch should be set for 1” W.C. more than the “Manifold Pressure
Setpoint” written on the Manifold Gas Pressure Setting tag. For example: if the tag states
that the unit was set up at 1.9
” W.C. full input rate as the factory calibration, then the high
gas pressure switch will be set for 2.9
” W.C. (1.0 kPa).
8.
Reduce the gas pressure back to the original setting listed on the tag.
9.
Press the
CLEAR
button on the Controller to clear the fault.
10.
The fault message should clear, the
FAULT
indicator should go off and the unit should
restart.
11.
Upon test completion, close the ball valve and remove the manomet
er. Replace the 1/4“
plug removed in step 2.
1/4" NPT PLUG
(Install manometer here for
HIGH
gas pressure test
)
1/4" NPT PLUG
(Install manometer here for
LOW
gas pressure test
)
SSOV
TO AIR/FUEL VALVE
MANUAL SHUTOFF VALVE
LOW GAS
PRESSURE SWITCH
HIGH GAS PRESSURE
SWITCH