Venting - Empire Comfort Systems MILLIVOLT 3 Series Installation Instructions And Owner's Manual

Vent Runs
In planning the installation for the fireplace, it is necessary to
install certain components before the appliance is completely
positioned and installed. These include the vent system, gas
piping for the appliance, Fresh Air Kit, and the electrical wiring.
(The fan option is available for louvered models only. Electric
ignition models will require electrical service to junction box).
The appliance can be mounted on any of the following surfaces:
1. A flat, hard combustible (burnable) surface.
2. A raised wooden platform.
3. Four (4) corner supports. (Example: Four (4) concrete
masonry blocks.) These supports must be positioned so
they contact all four (4) perimeter edges on the bottom
of the unit.
Locate and mark the center point of the vent pipe using a
nail on the underside of the roof. Drive the nail through the
center point. Mark the outline of the roof hole around this
center point.
NOTE: Size of the roof hole dimensions depend on the pitch
of the roof. There must be a 1 inch clearance (25mm)
to the vertical pipe sections. This clearance is to all
f i r e - p a r t s . c o m
combustible material.
Cover the opening of the vent pipe and cut and frame the roof
hole. Use framing lumber the same size as the roof rafters
and install the frame securely. Flashing anchored to frame
must withstand high winds. The storm collar is placed over
this joint to make a water-tight seal. Non-hardening sealant
should be used to completely seal this flashing installation.
determining minimum Vent Height Above the Roof.
WARNING: major U.S. building codes specify minimum
chimney and/or vent height above the roof top. These
minimum heights are necessary in the interest of safety.
These specifications are summarized in Figures 14 and 15.
VENT CAP
GAS VENT
ROOF PITCH
Flat to 6/12
6/12 to 7/12
Over 7/12 to 8/12
Over 8/12 to 16/12
Over 16/12 to 21/12
Figure 13
Page 12
LOWEST
DISCHARGE
OPENING
H
ROOF PITCH IS X/12
H (Min.) - Minimum height from
roof to lowest discharge opening
H (min.)
12" (305 mm)
15" (381 mm)
18" (457 mm)
24" (610 mm)
36" (914 mm)

VENTING

Note that for steep roof pitches, the vent height must be
increased. In high wind conditions, nearby trees, adjoining
roof lines, steep pitched roofs, and other similar factors can
result in poor draft, or down-drafting. In these cases, increasing
the vent height may solve this problem.
General maintenance
Conduct an inspection of the venting system semi-annually.
Recommended areas to inspect are as follows:
1. Check areas of the venting system which are exposed
to the elements for corrosion. These will appear as rust
spots or streaks and, in extreme cases, holes. These
components should immediately be replaced.
2. Remove the cap and shine a flashlight down the vent.
Remove any bird nests or other foreign material.
3. Check for evidence of excessive condensate, such as
water droplets forming in the inner liner and subsequently
dripping out at joints. Condensate can cause corrosion
of caps, pipe and fittings. It may be caused by having
excessive lateral runs, too many elbows and exterior
portions of the system being exposed to cold weather.
4. Inspect joints to verify that no pipe sections or fittings have
been disturbed and, consequently, loosened. Also, check
mechanical supports, such as wall straps or plumbers'
tape for rigidity.
A removable panel or other means must be provided in the
enclosure for visual inspection of the flue connection.
NOTE: This also pertains to vertical vent systems installed
on the outside of the building.
Installing the Vent System in a Chase
A chase is a vertical box-like structure built to enclose the
gas appliance and/or it's vent system. Vertical vent runs on
the outside of a building may be, but are not required to be
installed inside a chase.
CAUTION: Treatment of firestop spacers and construction
of the chase may vary with the type of building. These
instructions are not substitutes for the requirements
of local building codes. Therefore, your local building
codes must be checked to determine the requirements
for these steps.
NOTE: When installing this vent system in a chase, it is always
good building practice to insulate the chase as you would the
outside walls of your home. This is especially important for cold
climate installations. Upon completion of building your chase
framing, install the vent system by following the instructions in
this manual. Remember to build the chase large enough so
that minimum clearance of combustible materials (including
insulation) to the vent system are maintained.
This appliance must not be connected to a chimney
flue servicing a separate solid fuel or gas fuel burning
appliance.
WARNING
38142-2-0719