Dunkirk EXCELSIOR EXB4075 Installation, Operation & Maintenance Manual page 15

Figure 10 - Supply Piping and Control Assembly
NOTICE
Do not install valves between boiler and controls manifold
or relief valve.
LIMIT CONTROL
WITH INTEGRAL
LOW WATER
CUT OFF
THERMAL/ LWCO
WIRE
BURNER WIRING
8 - BOILER ASSEMBLY
BACK OF BOILER
15
RELIEF VALVE