Installation
900608-00 01/2019
Innovative Hearth Products
MHD40 Series Multi-View Direct-Vent Gas Fireplaces
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE
30
Figure 49 - Gas Connection
Turn on gas supply and test for gas leaks, us-
ing a gas leak test solution (also referred to as
bubble leak solution).
NOTE:
Using a soapy water solution is an
effective leak test solution but it is not recom-
mended, because the soap residue that is left
on the pipes/fittings can result in corrosion
over time.
A.
Light the appliance (refer to the lighting
instructions label in the control compart-
ment or in the Installation and Operation
Instructions manual).
B.
Brush all joints and connections with the gas
leak test solution to check for leaks. If bubbles
are formed, or gas odor is detected, turn the
gas control knob (off/pilot/on) to the “OFF”
position. Either tighten or refasten the leaking
connection, then retest as described above.
C.
When the gas lines are tested and leak free,
be sure to rinse off the leak testing solution.
Step 6. CONNECTING GAS LINE
Make gas line connections. All codes require a
shutoff valve mounted in the supply line.
Figure
49
illustrates two methods for connecting the
gas supply. The flex-line method is acceptable
in the U.S., however, Canadian requirements
vary depending on locality. Installation must
be in compliance with local codes. A sediment
trap is recommended in the gas piping within
the home to prevent moisture and debris in the
line from damaging the valve.
These appliances 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 appliance 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
shutoff valve is also provided with the flex line.
The gas control valve is located in the lower
control compartment.
WARNING
Never use an open flame to
check for leaks.
TEST ALL CONNECTIONS FOR GAS LEAKS
(FACTORY AND FIELD):
To access the valve open the lower control
compartment door
(
see Figure 51, Page 31
)
by
pushing in the right top corner of the door. (The
door is hinged at the bottom). Remove the bot-
tom compartment door by sliding the hinge pin,
located at the door’s left side, to the right until it
disengages from the left corner post hole. Pull the
door diagonally to the left, away from the fireplace.
The lower control compartment door on the
side opposite the valve lifts on and off.
The millivolt control valve has 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).
All codes require a shutoff valve mounted in
the supply line. The orientation of the shutoff
valve should face the front. A sediment trap is
recommended to prevent moisture and debris
in the gas line for damaging the valve.
f i r e - p a r t s . c o m
