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Gas Pressure Switch Tests
Low Gas Pressure Switch
The boiler is furnished with a low gas pressure switch, installed near the boiler's main gas
shutoff/control valve. The operation of this switch must be checked as follows:
1. Close the main gas cock (external to the boiler).
2. Cycle the boiler on by generating a heat request.
3. Allow the boiler to proceed through prepurge and attempt ignition.
When the main gas shutoff/control valve opens to attempt ignition, the low gas pressure switch will trip,
causing the NURO touchscreen to display 10012: "Low Gas Limit". Even after re-opening the main
gas cock, 10012: "Low Gas Limit" will remain on the NURO display until the boiler is manually reset
by pressing "Reset Control".
Make sure to re-open the main gas cock (external to the boiler) after a successful test.
High Gas Pressure Switch
The boiler is furnished with a high gas pressure switch, installed near the boiler's main gas
shutoff/control valve. The operation of this switch must be checked as follows:
1. Before starting the boiler, close the downstream gas cock located inside the boiler's enclosure.
2. Cycle the boiler on by generating a heat request.
3. Allow the boiler to proceed through prepurge and attempt ignition.
When the main gas shutoff/control valve opens to attempt ignition, the high gas pressure switch will trip,
causing the NURO touchscreen to display 10011: "High Gas Limit". Even after re-opening the
downstream gas cock inside the boiler, 10011: "High Gas Limit" will remain on the NURO display until
the boiler is manually reset by pressing "Reset Control".
Make sure to re-open the downstream gas cock (inside the boiler) after a successful test.
Revised: December 8, 2021
Released: December 8, 2021
NOTE
NOTE
Patterson-Kelley 2021
All Rights Reserved.
TM
P-K Storm
Gas Fired Boiler
Technical Service 1.877.728.5351
2691000273 P-K Storm ST2500-ST6000
Installation and Owners Manual Rev C.docx
Page 52
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