Setting up the Burner HI 400
64 ghi_tx001464gb.fm
6.8 Checking/Adjusting the Fuel Pressure
Requirements
300-psi (20 bar) fuel pressure gauge with long tube
G 1/8-in. threaded adapter (British Standard Pipe)
Background
Incorrect fuel pressure will result in poor heater performance.
Note: The fuel pressure differs between the low fire mode (stage I) and the high
fire mode (stage II). Therefore, the fuel pressure must be checked in both low fire
mode and the high fire mode.
Procedure
Perform the procedure below to check/adjust the fuel pressure.
1. Remove the access cover (a).
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2. Locate the fuel pump (b). Remove the threaded plug (c) from the pressure port.
Set the plug in a safe location to be re-installed later.
This procedure continues on the next page.
WARNING
Electric shock hazard. High voltage exists inside the machine. High voltage can
cause severe injury or death.
f Use extreme care when working inside the machine.
f Disconnect the power source before continuing this procedure.
WARNING
Cutting hazard. The blower motor may run if the power source is connected.
f Disconnect the power source before continuing this procedure.
WARNING
Burn hazard. The burner is hot while operating and for a period of time after it has
been shut down.
f Wear protective clothing and hand protection when performing this procedure.
wc_gr012097
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a
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