NOTE: DIAGRAMS AND ILLUSTRATIONS ARE REPRESENTATIVE AND ARE NOT DRAWN TO SCALE.
10
gENERAL gAS INfORMATION
AND IMPORTANT NOTICES
•
It is critical that a licensed instal ler
perform these steps strictly per NFPA
.
Installing a gas supply line from the fuel
supply to the appliance involves numerous
considerations, including materials, protec-
tion, sizing, location, controls, pressure,
sediment, and more.
•
Gas lines must be routed, constructed, and
made of materials that are in strict accord-
ance with local codes and regulations.
Check with local building officials for local
code requirements.
•
Never use galvanized or plastic pipe.
•
A sediment trap (not provided) is recom-
mended in the gas piping within the home to
prevent moisture and debris in the line from
damaging the valve.
•
Where required, tightly secure all joints
using appropriate pipe wrenches and seal-
ing compounds.
These appliances must be isolated from
the gas supply piping system (by closing
their individual manual 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).
These appliances and their individual
shutoff valves must be disconnected
from the gas supply piping system
during any pressure testing of that
system at pressures
greater than
1/2
psig (3.5 kPa).
IMPORTANT NOTICE REgARDINg
PROPANE INSTALLATIONS
Propane tanks are at pressures that will
cause damage to valve components.
Verify that the tanks have step-down regu-
lators to reduce pressures to safe levels.
Using a propane tank smaller than
100 lbs may create pressure loss and
insufficient fuel delivery, which can cause
sooting, severe delayed ignition, or other
malfunctions (ref. NPfA 58).
Any damage as a result of insufficient
tank size or other improper installation is
NOT covered under the limited warranty.
•
On threaded joints, use a pipe joint com-
pound rated for gas.
Always use propane-
resistant compounds in propane applica-
tions. Make sure pipe joint compound
does NOT get inside the pipe.
•
It is recommended to seal around the gas
line to prevent cold air leakage.
Orange Wire
(from DfC Wire
harness)
Main gas Inlet
3/8" NPT
green Wire
(from DfC Wire harness)
Line (IN) Test Port
Manifold (OUT) Test Port
Figure 10-3: SIT Gas Valve
Pressure Regulator
Tower
yellow ground Wire
(from DfC Wire harness)
LENNOX HEARTH PRODUCTS • ELITE LINEAR VIEW DIRECT-VENT GAS FIREPLACE (MODELS LDV42, LDV54) • INSTALLATION INSTRUCTIONS
gAS REqUIREMENTS
AND CONNECTION
Figure 10-4
glass Door Assembly
(Lower Right Corner)
Air Shutter
Adjustment Lever
gAS SUPPLy PRESSURE
REqUIREMENTS
MANIfOLD gAS SUPPLy PRESSURE
Natural gas
3.5" WC
(0.87 kPa)
Propane
10.0" WC
(2.49 kPa)
Figure 10-1
INLET gAS SUPPLy PRESSURE
fuel Type
Minimum
Maximum
Natural gas
5.0" WC
(1.24 kPa)
10.5" WC
(2.61 kPa)
Propane
11.0" WC
(2.74 kPa)
13.0" WC
(3.23 kPa)
INPUT RATES (BTU/hr)
fireplace
Model
Natural gas
Propane
LDV42
20,000
20,000
LDV54
30,000
30,000
Figure 10-2
INPUT RATES
gAS VALVE AND TEST PORT
INfORMATION
The SIT gas valve in this fireplace has a 3/8"
NPT thread main gas inlet and outlet (
Figure
10-3
).
Test gauge connections are provided on the
front of the gas control valve (identified
IN
for
the inlet and
OUT
for the manifold side).
Battery Backup holder
(attached to bracket with cable)
