P-K MACH
®
Gas Fired Boiler
Technical Service 1.877.728.5351
Revised: January 3, 2020
Released: January 3, 2020
Patterson-Kelley 2020
All Rights Reserved.
1004905981 P-K MACH C1500H-C4000 Installation and
Owners Manual (Rev F Jan-2020).docx
Page 56
4.4.3 Fuel Selector Switch Location
The image below shows the location of the Propane Gas (LP) / Natural Gas (NG) selector switch for the
P-K MACH
®
C2500GG, C3000GG and C4000GG models. To access this selector switch, open the
upper front door and look toward the top left of the inner cabinet, above the control panel assembly.
If operating with Natural Gas, ensure the Propane Gas valve/cock is CLOSED.
If operating with Propane Gas, ensure the Natural Gas valve/cock is CLOSED. Failure to do so could
result in equipment damage, injury, and/or death.
