P-K Storm
TM
Gas Fired Boiler
Technical Service 1.877.728.5351
Revised: October 2, 2019
Released: October 2, 2019
Patterson-Kelley 2019
All Rights Reserved.
2691000099 P-K Storm Installation and Owners
Manual.docx
Page 45
Manual Control Mode for High and Low Fire Adjustment
To adjust/tune
combustion, use the NURO’s “Manual Control Firing Rate” mode. To access this mode,
touch the “Info” button in the lower left corner of the screen, and then press “Service” in the lower left.
Next, touch “Press to Activate Manual Control” which will open the “Manual Control Firing Rate” mode.
This test mode should be used when adjusting or tuning the gas safety shut off/control valve.
Once in “Manual Control Firing Rate” mode, a heat request is required. Once the appliance cycles on
and is running in “Manual Control Firing Rate”, use the UP and DOWN arrows or the slider to force the
boiler to operate at low fire, high fire, or anywhere in-between. To prevent the appliance from cycling
off prematurely during adjustment, ensure that any load devices (air handlers, control valves, radiators,
air handling units, etc.) are in operation and are able to shed/dump the heat created by the boiler.
Recommended Combustion Settings for P-K STORM Boilers
The P-K Storm
™
boilers are equipped with a combination gas/air control and gas safety shut off control
valve. The “zero governor” gas valve responds to the variable speed combustion blower in order to
supply the correct air/gas ratio for optimum performance and efficiency.
Fuel
Nominal Gas Pressure
High Fire Setting
Low Fire Setting
% O
2
% CO
2
% O
2
% CO
2
Natural Gas
7" W.C.
6.3 - 5.7
8.3 - 8.7
6.3 - 5.7
8.0 - 8.5
NOTE:
Proper water flow should be established before performing any combustion adjustments to
ensure the boiler doesn’t short-cycle or overheat.
NOTICE!
For high altitude adjustments (greater than 2,000 feet above sea level), see
– Boiler Altitude Derate Schedule
at the end of this manual.
