21
GAS PRESSURE REQUIREMENTS
One major cause of operating problems with gas appliances can be improper gas pressure!
Such problems as changes in flame color or configuration, gas pilot or burner outages, intermittent operation
, changes
in heat output, excessive burner noise, etc. are nearly always the result of changes in gas pressure or impro-
per gas pressure at the time of the installation. The most important item to check during the installation and
the first thing to check when problems occur is gas pressure!
Gas supplies normally enter a residence at 1/2 PSI (13" - 15" W.C.) (3. KPA). A regulator is then placed inside
the residence, which drops this pressure to 7" W.C. (1.8 KPA) (Nat. Gas). This "inches to inches" regulator is
of adequate capacity to service the gas appliances (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. EXCEPTION: Some codes allow 2-PSI (1.4KPA) supplies to enter the residence, in which case
"pounds to inches" regulators are used.
The following table provides information on correct gas pressure requirements. Be sure your gas supplier or
plumber carefully follows this table.
DESIRED
INLET
PRESSURE
MINIMUM
INLET
PRESSURE
MAXIMUM
INLET
PRESSURE
NATURAL GAS
7.0" W.C.
(1.75 kPa)
5.0" W.C.
(1.12 kPa)
11" W.C.
(2.61 kPa)
L.P. GAS
11.0" W.C
.
(2.75 kPa)
11" W.C.
(2.75 kPa)
13.0" W.C.
(3.24 kPa)
TURN GAS VALVE KNOB TO "HIGH" POSITION. GAS PRESSURES MAY VARY PLUS OR MINUS 5%.
*NOTE: FOR HIGH ALTITUDE (ABOVE 5.000 FEET) SOME VARIATIONS IN AIR SHUTTER SETTINGS MAY BE REQUIRED.
Manifold pressure must be taken at the MANIFOLD" tap and inlet pressure at the "SUPPLY" tap
with the burner
oper-
ating
by a qualified installer.
GAS LEAK TEST REQUIREMENT:
It is the responsibility of the installer/service person to assure that each and
every gas connection and supply tubing that are a part of this fireplace are leak proof. The qualified/ certified individual
connecting the gas supply line, performing pressure tests or performing any service to this fireplace is required to perform
a THOROUGH LEAK TEST on ALL gas fittings that are a part of this appliance or the gas supply line connection using
soap-water solution or a calibrated combustible gas detector. Failure to perform this leak test may lead to a house fire
and/or an explosion. Mendota is not responsible for any damages due to an Installer’s failure to conduct a leak test and
verify that all connections and supply lines are leak proof.
WARNING:
Do not operate appliances with glass front removed, cracked, or broken. Replacement of glass should be
done a licensed or qualified service person.
Note:
Consult the local or national installation code(s) to assure that adequate combustion and ventilation air is
available.
f i r e - p a r t s . c o m
