Page 4
Part No. XG0106B
MD34-DV-2 Homefire
Vent Installation
This section covers the installation of direct venting and terminations.
Installation Requirements
n
MD34-DV-2 fireplaces are certified for use with Montigo Standard
Series (4" / 7") venting components
n
Minimum 1" clearance to combustibles required for vent pipes
n
Use only
certified Montigo vent components.
(Use of other
parts will void the Montigo warranty, and may impede the
operation of the fireplace.)
n
All joints must be secured with a minimum of two screws per joint
n
Vent terminations must not be recessed in walls or siding
n
Horizontal runs must be supported by a minimum of two supports
per horizontal run. A minimusm of one screw on each side of
support is also required
n
Flex vent sections may be stretched up to 50% of their total length
(eg. a 24" section may be stretched to 36")
n
Maximum horizontal run for a flex section with no vertical rise is 3 feet.
n
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.
n
Solid vent sections may be cut less than half way from the tapered end
n
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
Appendix B.
Cautions:
Cautions:
Cautions:
Cautions:
Cautions:
Installing The Gas Line
The gas line must be installed before finishing the MD34-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 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.
Installation
Figure 6.
Fireplace locations and vent terminations.
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 MD34-DV-2's gas valve, located behind the lower brass trim, may
be connected to a wall switch. The valve generates its own power. This
is a millivolt circuit. Use only low voltage wire, and DO NOT connect any
external power to it.
Refer to Figure 28 for wiring requirements.
Note: The switch location must not exceed 30' from the fireplace.
Figure 5.
Gas line access.
During any pressure testing of the gas supply piping that excedes 1/2
psig (3.5 kPa), the appliance and its individual shutoff valve must be
disconnected from gas supply system.
When pressure testing the gas supply piping system at test pressures of
less than or equal to 1/2 psig (3.5 kPa), the appliance must be isolated
from the gas supply piping system by closing its individual manual shutoff
valve.
n
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)
n
Do not obstruct, or attempt to conceal, the vent termination.
These actions will affect the operation of the fireplace, and
may be hazardous.
n
In heavy snow areas, take extra care to prevent snow buildup
from obstructing the vent termination.
