Montigo M38DV PRC - Manual (Page 4)

XG0204 04/05 Page 
Panorama Direct Vented Fireplace
Installing The Gas Line
The gas line must be installed before finishing the M38DV-PRC 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
upstream of the gas supply controls to the appliance. The fireplace
gas connection and the main operating gas valve is located behind
the removable brass 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.
The appliance and its individual shutoff valve must be disconnected
* 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.
Figure 4. Gas line access.
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).
Installation
Vent 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 M38DV-PRC fireplace uses Premium venting components
with:
5" inner dia. /8" outer dia.
 Minimum 2" clearance to combustibles required for vent pipes
 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
 Venting components can be used in any combination of solid/rigid
• Vent terminations can be very hot. National Standards
require that all terminations accessible to the public (below
7 feet from grade level, on balconies, or decks) be installed
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.
CAUTIONS:
Installing The Remote Switch
The M38DV-PRC 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.