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 109
7.4.6 Natural Gas / Propane Gas Train, Burner & Blower Assembly (C-4000)
Mark
Description
Mark
Description
1
External (Upstream) Gas Cock
6
Burner Hood Casting
2
Main Gas Shutoff/Control Valve
7
Burner Gasket
3
High Gas Pressure Switch
8
Stainless Steel Mesh Burner
4
Combustion Blower / Fan
9
Low Gas Pressure Switch
5
Auxiliary High Exhaust Back Pressure (“Dirty Burner”)
Switch
1
6
3
9
7
2
4
5
8