Installation
900005-00, 10/2015
Innovative Hearth Products
Envy™ Direct-Vent Gas Fireplaces
36
10.
Connect the Gas Line
All codes require a shutoff valve mounted in the supply line. The shutoff valve should be oriented to face the
fireplace front. The flex-line method is acceptable in the U.S.A. where local codes permit it. In the Commonwealth
of Massachusetts, installation must be performed by a licensed plumber or gas fitter. Canadian requirements vary
depending on locality. Installation must be in compliance with local codes. These appliances are equipped with a gas
flex line for use in connecting the unit to the gas line (
Figure 31
). The flex line is rated for both natural and propane
gas. A manual shutoff valve is also provided with the flex line.
NOTE:
A sediment trap is recommended in the gas piping within the home to prevent moisture and debris in the line
from damaging the valve.
NOTE:
Secure all joints tightly using appropriate tools and sealing compounds (ensure propane resistant compounds
are used in propane applications). Optionally, seal around the gas line to prevent cold air leakage. Gas line holes and
other openings can be caulked or stuffed with unfaced fiberglass insulation.
The gas control valve is located on the left of the firebox, in the side control compartment. The valve is accessible
with the glass door removed (
Figure 30
).
Figure 30 - Control Compartment
Figure 31 - Gas Line Connection
Gas Valve
Access Plate
Gas valve
Access
Gas
Stub
1/2 in. x 3/8 in. Flare
Shut-Off Valve
3/8 in. Flex Tubing
3/8 in. NPT x 3/8 in.
Flare Fitting
Gas
Valve
Flex Line Connector
Gas
valve
3/8 NPT x 3/8”
Flare fitting
1/2 x 3/8” Flare
shutoff valve
3/8” Flex tubing
Gas
stub
These fireplaces are equipped with a gas flex line for use (where permitted) in connecting the unit to the gas line. A
gas flex line is provided to aid in attaching the direct-vent fireplace to the gas supply. The gas flex line can only be
used where local codes permit. The flex line is rated for both natural and propane gas. A manual shut off valve is also
provided with the flex line.
1.
Route a hard pipe from the lefthand side to a spot directly below the access plate opening.
2.
Locate the shutoff valve and gas flex line and pull the assembly forward, out of the compartment. Separate the
shutoff valve from the gas flex line. Determine the length of pipe needed to route the gas line from the last fitting
to a point directly below the access plate opening.
3.
Using pipe-dressing materials appropriate for the gas type, securely affix the shutoff valve to this pipe at a
convenient location outside of the appliance control compartment.
4.
Insert the last length of gas pipe with the attached shutoff valve into the control compartment, and pass it
through the gas line access hole on the left side of the appliance outer wrapper.
5.
Using materials appropriate for the gas type, thread the last length of pipe into the end of the gas vent run and
tighten it in place using a pipe wrench.
6.
Turn the last piece of gas pipe in the last fitting until the shutoff valve is positioned in a way that allows the shutoff
valve handle to be accessed in the control compartment and easily operated through its full range of motion.
7.
Bring the flex line to the shutoff valve by hand and align the flare fittings. Tighten the fittings by hand, and then
use a wrench to tighten completely, 1/4 turn at a time.
Access the Control Compartment
See
Page 50
for instructions on
Accessing the Control Compartment
.
Electronic control valves have a 3/8” (10 mm) NPT thread inlet port.
Secure all joints tightly using appropriate tools and sealing compounds (ensure propane resistant compounds are
used in propane applications). Optionally, seal around the gas line to prevent cold air leakage. Gas line holes and
other openings can be caulked or stuffed with unfaced fiberglass insulation.
All codes require a shutoff valve mounted in the supply line. The orientation of the shutoff valve should face the
front.
Figure 31
illustrates two methods for connecting the gas supply. A sediment trap is recommended to prevent
moisture and debris in the gas line from damaging the valve.
