Gas Pressure Requirements - Mendota DXV-35 DEEP TIMBER II Installation & Operating Instructions Manual

A 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 improper 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 resi-
dence, which drops this pressure to 7" W.C. (1.8 KPA) (Nat. Gas). This "inches to inches" regulator is of adequate capac-
ity 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.

GAS PRESSURE REQUIREMENTS

NATURAL GAS
L.P. GAS
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 operating by a
qualified installer (see Figure 1: Pressure Test Port).
GAS PRESSURE REQUIREMENTS
DESIRED MINIMUM
INLET INLET
PRESSURE PRESSURE
5.0" W.C.
7.0" W.C.
(1.75 kPa) (1.12 kPa)
11" W.C.
11.0" W.C.
(2.75 kPa) (2.75 kPa)
Figure 1: Pressure Test Port
MAXIMUM MANIFOLD
INLET OUTLET
PRESSURE PRESSURE
11" W.C. 3.5" W.C.
(2.61 kPa) (0.87 kPa)
13.0" W.C. 10.0" W.C.
(3.24 kPa) (2.5 kPa)
7
AIR SHUTTER
POSITION*
1/8 - 1/4 " OPEN
(7 mm)
½" OPEN-MIN.
(14 mm)