ghi_tx001462gb_FM10.fm
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HI400HD D / HD G Operation
4.15 Connecting the Gas Line (G models)
Overview
The HI400HD-G heater includes a 3/4" NPT shutoff valve and inlet (a) on the gas
safety valve/pressure regulator body. The gas supply line connects to the inlet.
Gas
pressures
The table below lists the minimum and maximum gas supply pressures.
Regulating LP
gas pressure
The installation of a secondary pressure regulator is strongly recommended when
using LP gas. A secondary pressure regulator ensures a steady flow of LP to the
burner. A regulator is especially valuable when the gas supply pressure is
inconsistent.
Note: Gas piping, pressure regulators, and fittings are not included with this heater
and must be provided by the customer.
WARNING
Extreme fire and explosion hazard!
► Only a licensed, professional gas technician shall perform installation, fuel
supply connection, setup, adjustment, and testing of gas lines.
► All connections and settings must conform to relevant local, state, provincial,
and federal requirements.
Fuel
Minimum supply
pressure
Maximum supply
pressure
Natural gas 7
" w.c. 10" w.c.
Liquid propane (LP) 8
" w.c. 13" w.c.
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