Adp HED Series Installation Instructions Manual page 7

VENT TERMINATION ON SINGLE−WALL VERTICAL VENT RUNS
SINGLE−WALL VENT PIPE WITH
SINGLE−WALL TERMINATION
ROOF FLASHING
ROOF PITCHED
FROM 0" TO 45"
7 − The vent pipe must extend at least 3 feet (1m)
above the highest point where it passes through a
roof of a building. The vent must also extend at
least two feet higher than any part of a building
within a horizontal distance of 10 feet (3.05 m)
unless otherwise specified by the ANSI Z223.1 or
CSA−B149 installation compliance codes. The
vent must extend at least 5 feet (1.53 m) above
the highest connected equipment flue collar.
TABLE 3
MAXIMUM HORIZONTAL VENT CONNECTOR AND
HORIZONTAL VENT PIPE LENGTHS
HED−75 through
−150
No. of
Elbows
ft
1 25
2 20
3 15
4 10
5 5
6
−−
7
−−
8− When the length of a single-wall vent, including
elbows, exceeds the length shown in table 4, the
vent shall be insulated along its entire length with a
minimum of 1/2" thick foil faced fiberglass 1–1/2#
density insulation.
TABLE 4
MAXIMUM LENGTH UNINSULATED VENT CONNECTOR
(INCLUDING ELBOWS)
Model
HED−75
HED−100 THROUGH 300
*Not applicable for larger units. Maximum length of uninsulated vent
is equal to maximum allowable vent length from table 2.
2" CLEARANCE
THIMBLE
SEAL JOINT BETWEEN SINGLE−WALL VENT AND B" VENT TERMINATION
AND THE OPEN SPACE BETWEEN THE SINGLE WALL VENT PIPE AND
THE OUTER PIPE OF THE B" VENT TERMINATION.
HED−200 through
−300
m ft m
7.6 35 10.7
6.1 30 9.1
4.6 25 7.6
3.0 20 6.1
1.5 15 4.6
10 3.0
−−
5 1.5
−−
ft m
15 4.57
N/A* N/A*
SINGLE−WALL VENT PIPE WITH
DOUBLE−WALL (TYPE B−1) TERMINATION
ROOF FLASHING
ROOF PITCHED
FROM 0" TO 45"
12" MAX
FIGURE 3
HORIZONTAL VENTING
NOTE − Common venting is not allowed when
horizontally venting the duct heater.
If the HED duct heater is to be horizontally vented, a
positive pressure may be created in the vent. The duct
heater, when installed with horizontal venting, will
perform as a category III appliance.
1 − Special vent materials approved for use with
Category III appliances may be used with these
units. Refer to table 7 for venting components.
2 − If possible, do not terminate the horizontal vent
through a wall that is exposed to prevailing wind.
Exposure to excessive winds can affect unit
performance. If such a termination is necessary,
use a wind block to protect the vent termination
from direct winds.
3 − Vent termination must be free from obstructions
and at least 12" (30.5 cm) above grade level and
maximum snow height.
4 − Do not terminate vent directly below roof eaves or
above a public walkway, or any other area where
condensate dripping may be troublesome and
may cause some staining. Avoid windows where
steam may cause fogging or ice buildup.
5 − Minimum clearance for horizontal vent termination
from any door, window, gravity air inlet, gas or
electric meter, regulators, and relief equipment is
4 feet (1m) for United States installations.
In Canada, horizontal vent termination must have
a minimum 6-foot horizontal clearance from gas
and electric meters and relief devices.
Refer to latest editions of the ANSI Z223.1 or
CSA−B149 for installation compliance codes and
with local authorities with jurisdiction.
6 − Vent termination must be a minimum of 4 feet
(1.2m) horizontally from any soffit or under-eave
vent.
7
CLEARANCE TO BE
AS SPECIFIED ON
TYPE B" VENT PIPE.