Installing The Gasline; Vent Installation; Installation Requirements; Installing The Remote Switch - Montigo H38DF-ST Indoor Installation, Operation & Maintenance Manual

12
max.
RHS101
33 1/2"
Figure 2b. Framing dimensions. (Rear Vent)
Figure 2c. Back frame dimensions.
Installing The Gas Line
The gas line must be installed before finishing the H(L)38DF-ST Series
Fireplace. Natural Gas requires a minimum inlet gas supply pressure
of 5.5" W.C. & a manifold pressure of 3.5" W.C. Propane Gas requires a
minimum inlet gas supply pressure of 11" W.C. & a manifold pressure of
10" W.C. Provision must also be made for a 1/8" N.P.T. plugged tapping
and be accessible for test gauge connection immediately upstream of
the gas supply controls to the appliance. The fireplace gas connection
and the main operating gas valve is located behind the removable trim
at the bottom of the unit and need only be attached to the gas line with
an approved fitting, as required by the applicable installation codes.
To access the fireplace gas connection the main burner must be
removed as shown below in figure 5b.
• Only use gas shut-off valves approved for use by the state, province,
region, or governing body, in which the appliance is being installed, or
as required by the applicable installation codes.
• Flexible gas connectors must not exceed 3 feet in length, unless it is
allowable within applicable installation codes.
Figure 3. Gas line access.
Part No. XG0207 -092109
Installation
shelf
10
min.
41"
H(L)38DF-ST See-thru indoor Gas Fireplace
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 1/2 psig (3.5 kPa).
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
1/2 psig (3.5 kPa).
Note: After gas line is connected, each appliance connection,
valve and valve train must be checked while under normal
operating pressure with either a liquid solution, or leak
detection device, to locate any source of leak. Tighten any
areas where bubbling appears or leak is detected until
bubbling stops completely or leak is no longer detected.
DO NOT use a flame of any kind to test for leaks.

Installing The Remote Switch

The H(L)38DF-ST are equipped with a remote-operated valve for use
with a wall switch. See Figure 21 for information on wiring the switch.
The valve is pre-wired and generates its own power. DO NOT con-
nect any external power to it.
Note: The switch location must not exceed 30' from the fireplace.

Vent Installation

This section covers the installation of direct venting and terminations.

Installation Requirements

H(L)38DF-ST Series fireplaces are certified for use with Montigo Standard

Series (5" / 8") venting components.
Minimum clearance to combustible construction around the vent pipe is 1"

on all sides, except on horizontal venting where the top of the pipe must
have a clearance of at least 2".
Use only certified Montigo vent components. (Use of other parts will void

the Montigo warranty, and may impede the operation of the fireplace.)
All joints must be secured with a minimum of two screws per joint

Vent terminations must not be recessed in walls or siding

Horizontal runs must be supported by a minimum of two supports per hori-

zontal run. A minimum of one screw on each side of support is also required
Flex vent sections may be stretched up to 50% of their total length (eg. a

24" section may be stretched to 36")
Venting components can be used in any combination of solid/rigid

Solid vent sections may be cut less than half way from the

tapered end
Venting components can be used in any combination of solid/rigid pipe or

flex pipe and in any orientation (Male connectors can face in any direction)
.
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