Installing The Gasline; The Remote Switch - Montigo M40DV-CR Installation Operation & Maintenance

Installing The Gas Line
The gas line must be installed before finishing the M40DV-CR/CL fire-
place. 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 up-
stream of the gas supply controls to the appliance. The fireplace gas
connection and the main operating gas valve are 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.
• 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.
The appliance and its individual shutoff 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 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).
* 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 detec-
tion 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.
P/N XG0206
Installation
This section covers the installation of direct venting and terminations.
For a detailed diagram of allowed termination locations, see Appen-
dix A.
Installation Requirements
 The M40DV-CR/CL fireplace uses Premium venting components
with:
5" inner dia. /8" outer dia.
 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 horizontal run. A minimum of one screw on each side of sup-
port 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")
Maximum horizontal run for a flex section with no vertical rise is 3

feet.
 Flex vent sections over 3 feet must fall within the limits set by the
venting graph and must have a minimum vertical rise of 3 inches
per foot of flex.
 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
Vent terminations can be very hot. If the termination is less than

7 feet above a public walkway, it should be fitted with a certified
Montigo Heat Guard. (Part no. PTKOG)
Do not obstruct, or attempt to conceal, the vent termination.

These actions will affect the operation of the fireplace, and may
be hazardous.
In heavy snow areas, take extra care to prevent snow buildup

from obstructing the vent termination.
Installing The Remote Switch
The M40DV-CR/CL is equipped with a remote-operated valve for use
with a wall switch. See Figure 19 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.
M40DV-CR/CL Corner Gas Fireplace
Vent Installation
Cautions:
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