26 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Fuel
Type
Inlet Pressure Manifold Pressure
Desired Minimum Maximum On Hi
Fire
On Lo
Fire
Natural
Gas
7" WC 5" WC 10.5" WC 3.5" WC 1.7" WC
LP Gas 11" WC 10.5" WC 13" WC 10" WC 5.4” WC
The Ravelle™ 30 gas fireplace must be connected to the gas line in ac-
cordance with local codes and/or the National Fuel Gas Code, ANSI Z223.1
(In Canada, the current CAN/CSA B149.1 installation code). The gas
line should enter the fireplace on the left side through the hole provided
(see diagrams on Page 11). The fireplace comes with a flex line attached
to the supply side of the gas valve. The fitting on the end of the flex line
can receive a 1/2” female iron pipe coupling, a 3/8” male iron pipe, or a
shut-off valve. There is sufficient room to locate the shut-off valve under
the firebox at the end of this flex line; however, local codes may require
the shut-off to be located on the exterior of the fireplace. After connect-
ing the gas line, all joints in the line and connections at the valve should
be checked for leaks before final positioning of the unit. Conduct a gas
leakage test of the appliance piping and control system downstream of
the shutoff valve in the supply line to the appliance.
Gas Pressure RequirementsA MAJOR CAUSE OF OPERATING PROBLEMS WITH GAS APPLI-ANCES IS IMPROPER GAS PRESSURE!The most important item to check during the initial installation and the first thing to check when operating problems occur is gas pressure! This fireplace will not function properly unless the required gas pressure is supplied. See the table on this page for gas pressure requirements.
Two pressure taps are provided on the fireplace’s valve to check gas
pressures. The taps are located to the right of the on/off/pilot knob
(see Figure 30). The bottom tap is the inlet (supply) pressure side. To
check inlet pressure (with the fireplace burning) insert a small phillips
screwdriver into the tap and turn a half turn counterclockwise. Cover the
tap with the line from a manometer and check the pressure. Close the
tap gently but securely after completing the check. The manifold (outlet)
tap is above the inlet tap. To check manifold pressure (with the fireplace
burning at the high burn setting) insert a small phillips screwdriver into
the tap and turn a half turn counterclockwise. Cover the tap with the line
from the manometer and check the pressure. Again close the tap gently
but securely after completing the check. Check the taps for gas leaks with
a gas leak test solution - retighten if necessary.
If the pressure is not sufficient, make sure the gas supply line is large
enough, the supply regulator is properly adjusted and the total gas load
for the residence does not exceed the amount supplied.
Propane tanks are at pressures that will cause damage to valve com-
ponents. Verify that the tanks have step down regulators to reduce the
pressure to safe levels.
LP and Natural Gas Supplies
Your Ravelle 30 gas fireplace is equipped from the factory for use with
natural gas only as specified on the Safety / Listing label attached to the
appliance. This appliance can only be operated using propane gas (LP)
if a certified fuel conversion kit provided by Lennox Hearth Products is
installed by a qualified service technician.
Also check the orifice size on the label on the igniter bracket. It must be
the correct size for the fuel and altitude.
Do not run propane tank dry. Running the tank dry may cause a hazardous condition due to pressure drop in empty tank. Solid fuel is NOT to be used with this unit.
Robertshaw Millivolt Gas Valve
TP/TH
TH
TP
Inlet (Supply)
Pressure Tap
Figure 30
The Manifold
(Outlet) Tap
GAS LINE INSTALLATION
The appliance must be isolated from the gas supply piping system
by closing its equipment shutoff valve during any pressure testing of
the gas supply piping system at test pressures equal to or less than
1/2 psig (3.5 kPa).
The appliance and its appliance main gas valve must be disconnected
from the gas supply piping system during any pressure testing of that
system at test pressures in excess of 1/2 psig (3.5 kPa).