Installing The Gasline; Direct Vent Installation; General Venting Requirements - Montigo B34DV-2 Installation Operation & Maintenance

B-Series DV-2 Gas Fireplace
Installing The Gas Line
The gas line must be installed before finishing the B-Series DV-2
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.
• 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 5. Gas line access.
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.
Vent Installation
This section covers the installation of direct venting and terminations.
Installation Requirements
B-Series DV-2 fireplaces are certified for use with Montigo Standard Series
■
(4" / 7") 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".
Page 4
Installation
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 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")
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.
Solid vent sections may be cut less than half way from the female 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)
Vent Terminations
Selecting A Termination Location
Choosing your vent termination location will help to determine whether
you need to use a top vent or rear vent fireplace. Figure 6, below, shows
typical fireplace locations and the venting options they provide.
For a more detailed diagram of allowed termination locations, see Ap-
pendix A.
Figure 6. Fireplace locations and vent terminations.
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. MTKOG).
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.
Use Montigo VSS Vinyl Heat Shield when using on
■
applications with vinyl siding to guard against possible
damage.
Cautions:
Part No. XG0160