CleaverBrooks profire q, Installation, Operation And Maintanance

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750-370
ProFire Q Series Manual 1-5
Introduction
FIGURE 1-4.
Main Gas Train for Full Modulation (Q6-037 to Q8-250)
1.6.2 — Direct Spark Components
1.6.3 — Operation
Metered gas flows through the main gas shutoff cock, through the pressure regulator to the automatic gas valves to the
gas manifold.
For low-high-low burners, the Kromschroeder low/high fire air-gas ratio regulator valve modulates gas flow to the
burner. The air is controlled by a UGB board.
For fully modulating burner, the butterfly gas valve modulates gas flow to the burner. The butterfly valve is positioned
by the servo. The air is controlled by the LMV37 linkageless system.
The automatic gas valve(s) cannot be energized unless the combustion air proving switch is closed and air flow is
detected.
NOTE: These piping layouts are for reference only and are subject to change without notice. Optional equipment may change
a layout.
Component Description
Igniter 14,000 volt single high voltage electrode
750-0051
LEAK
TEST
VALVE
GAS
VALVE
GAS
VALVE
ERFLY
LVE
REGULATOR
SHU
VA
HIGH
GAS
PRESSURE
SWITCH
LOW
GAS
PRESSURE
SWITCH
SHUTOFF
VALVE
LEAK TEST PORTS