Ir Hutter Djustment; As Ine Nstallation; Lp & N Atural As Upplies; As Ressure Equirements - Lennox Hearth Products RAVENNA RDV3340 Installation And Operation Manual

Gas Line Installation

After leveling, position the insert in the fireplace - holding
it about six inches out from its final location.
Caution: Specific hearth requirements apply (see Clear-
ances to Combustibles).
The Ravenna™ gas insert must be connected to the gas
line in accordance with local codes and/or the National Fuel
Gas Code, ANSI Z223.1 (In Canada, the current CAN/CSA
B149.1 installation code). The insert comes with an 8" nipple
attached to the supply side of the gas valve. 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.
g p r
as ressure equirements
A MAJOR CAUSE OF OPERATING PROBLEMS WITH GAS
APPLIANCES 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 appliance 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 insert's valve to
check gas pressures. The taps are located to the right of
the on/off/pilot knob (see Figure 14). The bottom tap is the
inlet (supply) pressure side. To check inlet pressure (with
the insert 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 insert 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.
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/ 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/ psig. Check with your gas
supplier or plumber.
1
Fuel
Type
Natural
Gas
LP Gas
Figure 14
lp
and
Your Ravenna gas insert 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 conver-
sion 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.

Air Shutter Adjustment

The Ravenna gas insert has an air shutter control lever
located behind the lower door on the insert's face and to
the left of the gas valve (see Figures 15a & 15b). The lever
is linked to the primary air shutter on the main burner. The
air shutter regulates the amount of primary air the burner
receives and therefore how clean the insert burns. The air
shutter should only be adjusted by a qualified gas techni-
cian. The insert should burn for about 15 minutes with the
logs installed before adjusting the air shutter. More air will
result in shorter flames and less color, less air will result
in bigger flames and more color. To adjust the air shutter,
insert a regular screwdriver into the slide adjustment and
slide it side to side (see Figures 15a & 15b). Caution: The
air shutter should never be set so as to make the tips of
the flames sooty or create sooting on the viewing glass,
logs, or heat exchanger. If soot begins to form after burn-
ing, the air shutter should be opened gradually until the
sooting condition stops. Gas quality and gas pressure
may vary, which can affect the burning characteristics
of the insert.
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
The Manifold
Inlet (Supply)
Pressure Tap
n g s
atural as upplies
Manifold Pressure
On Hi On Lo
Fire Fire
3.5" WC 1.7" WC
10" WC 5.4" WC
TH
TP
TP/TH
(Outlet) Tap