Gas Line Installation; Gas Pressure Requirements; Lp And Natural Gas Supplies - Lennox Hearth Products Ravelle 30 Installation And Operation Manual

GAS LINE INSTALLATION
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 7). 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 Requirements
A 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 29). 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 counter-clockwise. 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 counter-clockwise. 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.
Note: The appliance and its individual shut-off 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. The appliance must be
isolated from the gas supply piping system by closing its individual
manual shut-off valve during any pressure testing of the gas supply piping
system at test pressures equal to or less than 1/2 psig. Check with your
gas supplier or plumber.
Fuel
Type
Natural
Gas
LP Gas
Figure 29
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.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Inlet Pressure
Desired Minimum Maximum
7" WC 5" WC 10.5" WC
11" WC 10.5" WC 13" WC
Robertshaw Millivolt Gas Valve
Inlet (Supply) The Manifold
Pressure Tap
(Outlet) Tap
Manifold Pressure
On Hi On Lo
Fire Fire
3.5" WC 1.7" WC
10" WC 5.4" WC
TH
TP
TP/TH
1