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FV36 85-03-01014
Gas Pressure Requirements
Inlet and manifold gas pressure checking taps are located on gas valve. Perform inlet and outlet pressure
tests before completing the facing installation. Remove valve access cover box on left side of fireplace to
access the gas valve and all control components.
A qualified installer must take pressure measurements at these ports to verify and set the correct inlet gas
pressures during initial installation. Outlet gas pressures are factory-set and cannot be field adjusted.
Note: Check for gas leaks with soap and water solution on all factory joints and field installed joints during
first firing of this fireplace.
One of the main causes of operating problems with gas fireplaces can be improper gas pressure. Problems
such as changes in flame color or configuration, gas pilot or burner outages, intermittent operation, changes
in heat output, and excessive burner noise are nearly always the result of changes in gas pressure or
improper gas pressure at the time of the installation.
The most important item to check during initial installation and the first thing to check when problems
occur are the input and output gas pressures.
Gas is normally supplied to a residence at ½ PSI (13" – 15" WC (3 kPa). A pressure regulator is then placed
outside the residence, near the gas meter, which drops this pressure to 7" WC (1.8 kPa) (natural gas). This
"inches to inches" regulator is of adequate capacity to service the gas fireplaces (such as dryer, furnace, etc.).
If this regulator's capacity is not sufficient to add the gas fireplace, an additional "inches to inches" regulator
must be installed for the fireplace. The following table provides information on correct gas pressure
requirements:
GAS PRESSURE REQUIREMENTS
Note: Ensure your gas supplier or plumber carefully follows this table.
Exception: Some codes allow 2-PSI (1.4 kPa) supplies to enter the residence, in which case "pounds to
inches" regulators are used.
Manifold pressure must be taken
at the “output pressure" tap and
inlet pressure at the "inlet
pressure" tap with the burner
operating by a qualified installer.
Perform pressure tests prior to
installing fascia material around
this fireplace.
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