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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Innovative Hearth Products
Montebello
®
ST Direct-Vent Gas Fireplaces
Installation Instructions
900355-00, 06/2016
Schedule 40, Black Iron Pipe
Inside Diameter (Inches)
Schedule 40 Pipe
Length (feet)
Natural
Gas
Propane
Gas
0-10
1/2
3/8
10-40
1/2
1/2
40-100
1/2
1/2
100-150
3/4
1/2
150-200
3/4
1/2
Table 6
Proper Sizing of Gas Line
Properly size and route the gas supply line
from the supply regulator to the area where the
appliance is to be installed per requirements
outlined in the National Fuel Gas Code, NFPA
54 - latest edition (USA) or CAN/CGA-B149.1
- latest edition (Canada).
Never use galvanized or plastic pipe. Refer to
Table 6
for proper sizing of the gas supply line,
if black iron pipe is being used. Gas lines must
be routed, constructed and made of materials
that are in strict accordance with local codes
and regulations.
IMPORTANT: It is critical that a licensed
installer perform this step strictly per
NFPA.
We recommend that a qualified, licensed
plumber or gas fitter be hired to correctly size
and route the gas supply line to the appliance.
Installing a gas supply line from the fuel supply
to the appliance involves numerous consider-
ations of materials, protection, sizing, loca-
tions, controls, pressure, sediment, and more.
Certainly no one unfamiliar and unqualified
should attempt sizing or installing gas piping.
NOTES:
• All appliances are factory-equipped with a
flexible gas line connector and 1/2" shutoff
valve (see
Figure 37,
Page 29)
.
• See
Massachusetts Requirements
on
Page 6
for additional requirements for in-
stallations in the state of Massachusetts in
the USA.
• The gas supply line should not be connected
to the appliance until
Step 6
(Page 29)
.
• A pipe joint compound rated for gas should
be used on the threaded joints. Ensure
propane-resistant compounds are used in
propane applications. Be very careful that
the pipe compound does not get inside the
pipe.
• Sediment Trap: It is recommended to install
a sediment trap in the supply line as close as
possible to the appliance (see
Figure 37 on
Page 29)
. Appliances using propane should
have a sediment trap at the base of the tank.
• Check with local building official for local
code requirements (such as whether below-
grade penetrations of the gas line allowed,
etc.).
Figure 15 - INDOOR / INDOOR
Figure 16 - INDOOR / OUTDOOR
19-1/2"
(495 mm)
7”
(178 mm)
Right Side Viewed From
Gas Control Side
19-1/2"
(495 mm)
7”
(178 mm)
1-1/2”
(38 mm)
Right Side Viewed From
Gas Control Side
Route a 1/2" (13 mm) gas line along the inside
of the right side framing as shown in
Figures 15
and 16
. Gas lines must be routed, constructed
and made of materials that are in strict accor-
dance with local codes and regulations.
All appliances are factory-equipped with a flex-
ible gas line connector and 1/2" shutoff valve
(see Step 6 on
Page 29)
.
The incoming gas line should be piped into
the valve compartment and connected in one
of the two methods as shown in
Figure 37
on
Page 29
.
NOTICE
For indoor/outdoor installations, the
CONTROL SIDE of the fireplace must be
installed on the INDOOR side.
Step 2. ROUTE GAS LINE
IMPORTANT NOTE REGARDING
PROPANE INSTALLATIONS
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.
