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The straight termination consists of 2 parts (sleeve and termination itself). Separate them before
installation.
1. Check the location of appliance and the path for the vent system. And calculate the required
number and combination of items (see the dimensions of items in Fig.1).
2. Check wall thickness where the vent system passes through, and select suitable horizontal
termination according to TABLE 2. Cut the opening for the sleeve with the diameter in TABLE 2.
(Cover the flue outlet to avoid debris from entering the appliance)
3. Adjust the length of the sleeve so that the end of the sleeve protrudes about 0.2" (5mm) from
the wall. Then fasten the sleeve with the screw provided.
*Remember a stamped letter on the sleeve.
4. When the opening is too large, twist the packing provided around the end of the sleeve after
peeling off backing paper from the packing.
5. Insert the sleeve to the wall and fasten with 4 screws provided. Use plugs provided if needed.
*Ensure the UP label on sleeve plate is at the top.
*If it isn't easy to insert the sleeve because the packing doesn't fit the wall, press down the packing
during insertion.
6. Seal between the end of the sleeve and wall, and between the end of inner sleeve pipe and
outer pipe.
7. Adjust the length of the termination by fastening it at the stamped number same as that in 2.
8. Fasten the condensation prevention plate with the screw provided if this plate is needed.
9. Insert the termination into the sleeve from inside wall so that 4 studs on sleeve plate are
inserted into each 4 holes on termination plate and fasten the termination to the sleeve with the
4 nuts provided.
*Ensure that the label on the termination is at the top.
10. Ensure that the end of air Intake pipe protrudes about 0.4" (10mm) from the sleeve.
11. Install the vent system from the appliance to straight termination with using straight lengths,
adjustable lengths, and elbows. If vent system have vertically installed lengths longer than 5'
(1.5m), or have 3 elbows, install drain tee directly on the appliance flue outlet and male-male
adapter before horizontal lengths.
Make sure that a continuously DOWNWARD slope of no less than 2º (1/4 in/ft) is maintained
in the horizontal portion.
Refer to Fig 4-3 & 4-4 page 45.
12. Support the vent system every 5' (1.5m) with support straps.
13. Attach facing plate for outer wall as required.
*Drill 3 pilot holes in the outer wall first. Then insert plugs to the holes and fasten the facing plate
to the wall with 3 screws provided. Locate the notch of the facing plate at the bottom of the plate.
*Seal between the facing plate and the wall. Do not seal the notch.
Horizontal extended installation (See Fig. 6).
VENT PIPE INSTALLATION
Unless a drain tee is used, the maximum vertical height of the vent system can not exceed 5'
(1.5m).
Number of 90º elbow
3
2
1
Maximum vent length
23'
29'
35'
Maximum vent length
(7.0m)
(8.8m)
(10.7m)
Summary of Contents for MWH-180
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