Adp SEP-100, Installation Instructions Manual, Page: 8 / 20

TABLE 6
MAXIMUM HORIZONTAL VENT CONNECTOR AND
HORIZONTAL VENT PIPE LENGTHS
SEP − 100, −115, SEP − 230,
No. of
− 145, −175, and − 250 and SEP − 345 SEP − 400
− 200 − 300
Elbows
ft m ft m ft m ft m
1 25 7.6 35 10.7 31 9.4 21 6.4
2 20 6.1 30 9.1 22 6.7 12 3.6
3 15 4.6 25 7.6 13 4.0 3 0.9
4 10 3.0 20 6.1 4 1.2
−− −−
5 5 1.5 15 4.6
−− −− −− −−
6
−−
−−
10 3.0
−− −− −− −−
7
−−
−−
5 1.5
−− −− −− −−
HORIZONTAL VENTING
NOTE
− Common venting is not allowed when
horizontally venting the unit heater.
If the SEP unit heater is to be horizontally vented, a
positive pressure may be created in the vent. The unit
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 − Vent termination must be a minimum of 6 feet (1.83
m) from an inside corner formed by two exterior
walls. If possible, leave a 10 −foot clearance.
8 − Vent termination must be a minimum of 10 feet
(3m) from any forced air inlet (includes fresh air
inlet for other appliances, such as a dryer).
9 − For upward sloped vent, a condensate tee and
drain must be installed within the first 5 feet (2m)
from the unit heater to protect the appliance. If
the unit is shut down for an extended period of
time and will be exposed to sub-freezing
temperatures, the condensate may freeze.
10 − For upward sloped vent, see figure 3, condensate
tee and drain must be installed within the first 5 feet
(1.53 m) from the unit heater to protect the
appliance.
11 − Flexible loop trap in condensate line (if used) must
be filled with water to prevent combustion
products from entering structure.
12 − Select a wall termination point that will maintain
1/4" rise per foot slope of horizontal run of vent
pipe. In areas where authorities having jurisdiction
permit, a downward slope of maximum 1/4" per
foot is also acceptable. Condensate drainage can
be collected in a tee pipe section (figure 4) with
drain loop similar to one used for upward slope
vent, or allowed to drip through the vent
termination, if permitted by authorities (figure 5).
13 For horizontal venting, the vent pipe must be
supported with hangers no more than 3 feet (1m)
apart to prevent movement after installation.
14 − All horizontal vent applications which use Category
III vent pipe must terminate with an approved
Category III tee. Opening end must face downward.
15 − When termination is routed through an exterior
combustible wall, the vent must be supported
using a listed clearance thimble. Inside edge of
vent termination tee or elbow must be at least 12"
(305mm) from outside wall.
8