Enviro Westport - Vent Configurations and Restrictor Settings

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5
4
3
2
1
0’
(0 m)
0’
(0 m)
5’
(1.52 m)
5’
(1.52 m)
10’
(3.05 m)
10’
(3.05 m)
15’
(4.57 m)
15’
(4.57 m)
20’
(6.10 m)
25’
(7.62 m)
30’
(9.14 m)
18’
(5.49 m)
23
1
2
3
4
5
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  
  
  
1
2
3
4
5
Figure 35: Restrictor plate settings.
Initial Installation
QUALIFIED INSTALLERS ONLY
Figure 36. Possible Vent Congurations for Top Vented;
Vertical and Horizontal Terminations.
VENT CONFIGURATIONS AND RESTRICTOR SETTINGS:
Figures 36 shows the range of venting options, it shows possible
vent congurations if the unit is top vented, for vertical and
horizontal terminations, any layout that remains within the
shaded area is acceptable. Having the fewest number of elbows
is ideal, as they tend to disrupt air movement. Using 45˚ elbows
is preferable to using 90˚ elbows. Also, a shorter vent system will
perform better than a longer one.
The ENVIRO WESTPORT has been designed with a built in
restrictor plate. The restrictor is designed to enhance ame
appearance when installing this unit with vertical chimneys as
well as installations with longer horizontal vent applications. It
does this by controlling the amount of air moving through the
vent pipe.
NOTE: The total length of the vent pipes can not exceed 30
feet (9.14 m). Any combination of rise and run can be used
as long as it lays within the shaded area (a total of three
(3) 90° elbows or six (6) 45° elbows can be used). In
addition to what is shown, if a 90° elbow is used
in the horizontal plane, 3 feet (91.4 cm) must
be subtracted from the allowable horizontal
run (for each 45° elbow, 1 feet must
be subtracted from the allowable
horizontal run).
Figure 36 shows the vent restrictor position
required, relative to the length of vent pipe.
Longer vertical vent lengths necessitate greater
restriction; position 1 is open and position 5 is
maximum restriction (refer to Figure 35). To
avoid injury, it is best to make this adjustment
when the replace is cool or use welder’s gloves
or oven mitts.
To access vent restrictor remove the valve cover
plate from the right rear corner of the unit by
undoing the two fastening screws.
Loosen the ” hex head bolt and adjust to the
correct setting.
Slide the hex head bolt to the next setting and
re-tighten the bolt to secure in place.
The numbers in this chart represent the actual
vent restrictor settings. Although the numbers
do not appear on the unit use this as a guide
to follow.
Undo the setscrew and adjust the restrictor to
the correct setting.
Ensure that the setscrew is re tightened and the
unit is checked for proper operation.
Wait for unit to warm up to operating
temperature to ensure proper and clean burning
unit.
Note: 0,0 in Figure 36 represents a 90˚ bend
directly off the outlet of the unit, in all horizontal
instances except when using Selkirk and having
less than a 4 ft (1.22 m) rise and 8 ft (2.44 m)
horizontal offset. In this case, a 1 foot (30.5 cm)
rise must be added below the 90˚ bend.