Empire Comfort Systems MV CONTROL DVL36BP30KN-1 Installation Instructions Manual page 39

VERTICAL THROUGH-THE-ROOF APPLICATIONS
Your Gas Fireplace has been approved for:
a) Vertical installations up to 40 feet in height.
b) Two sets of 45-degree elbow offsets within these vertical
installations. From 0 to a maximum of 8 feet, a vent pipe can
be used between elbows.
c) Wall straps must be used to support offset pipe every 4 feet.
This application will require that you first determine the roof pitch
and use the appropriate venting components.
OFFSET CHART
OFFSET
OFFSET
SIZE
Chimney
Elbow
Section
Degrees
45° 0
45° 6
45° 9
45° 12
45° 24
45° 36
45° 36
45° 48
41971-4-1121
VERTICAL TERMINATION (CONT'D)
RISE
4 in X 6-5/8 in
Offset Rise
Inches Inches
(Dimensions In Inches)
5-5/8 15-3/8
8-7/8 18-3/8
10-7/8 20-5/8
13 22-5/8
21-3/8 31-1/8
29-7/8 39-3/8
28-7/8 39-3/8
38-1/4 47-7/8
Figure 55
GENERAL MAINTENANCE
Inspect venting system semi-annually as follows:
1. Check for corrosion areas of the venting system exposed
to the elements. These will appear as rust spots or streaks
and, in extreme cases, holes. Replace damaged components
should immediately.
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.
Venting termination shall not be recessed into a wall or siding.
A removable panel or other means must be provided in the
RISE
enclosure for visual inspection of the flue connection.
NOTICE: This also pertains to vertical vent systems installed on
the outside of the building.
Slide the vertical vent cap over the ends of the vent pipe and
secure. See Figure 56.
FEMALE
LOCKING
LUG
MALE
LOCKING
LUG
Figure 56
Page 39