Gas Pressure Switch Tests; Proof Of Closure Switch Test (St6000 & St8000 Only) - Patterson-Kelley P-K STORM ST-8000 Installation And Owner's Manual

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.
3.10.6 Proof of Closure Switch Test (ST6000 & ST8000 ONLY)
The boiler is equipped with an integrated proof of closure switch in one of the gas valve actuators. The
operation of this switch must be checked as follows:
1. Disconnect the gray plug from the forward most gas valve actuator.
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 boiler will recycle to attempt
ignition again, causing the NURO touchscreen to briefly display "Proving Circuit". During the ignition
attempt a small yellow light should be illuminated on Relay 1. If the boiler is allowed to recycle the unit
will eventually lockout, causing the NURO touchscreen to display 10007: "Did not Start in Allotted
Time". Reconnect the gray plug to the forward most gas valve actuator. If 10007: "Did not Start in
Allotted Time" is displayed
Revised: February 2, 2024
Released: February 2, 2024
NOTE
NOTE
the boiler must be manually reset by pressing "Reset Control".
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P-K Storm Gas Fired Boiler
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2691000403 P-K Storm ST2500-ST8000
Installation and Owners Manual Rev G.docx
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