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(1) Selecting installation site.
• A vent system that exits the structure through a sidewall or the like shall terminate not less
than 12" (30.5cm) above the ground.
• The termination of the vent system shall be located above the snow line in geographical
areas where snow accumulates.
• The termination of the vent system shall not be located in public traffic areas, such as
walkways, unless the vent system is at least 7' (2.13m) above the ground.
And also ensure that positioning of the vent system complies with the requirements of
AS5601/AG601 Clause 5.13.6.2/Fig. 5.3
Check local codes and ordinances which may require higher clearances.
(2) Clearance to combustibles and openings
Maintain clearances to openings as follows
• Terminate the system 6' (1.8m) from the combustion air intake of any appliance.
• Place the system at least 3' (0.9m) away from any other building opening, gas utility meter,
service regulator or the like, or less distance if specified in the appliance's instructions.
VENT PIPE INSTALLATION
Items of vent system.
General installation requirements.
Items shown below in TABLE 1 are used for this vent system. The diameters of pipes are 3.1"
(79mm) for inner vent pipe and 5" (127mm) for outer air intake pipe. The length of the items are
shown in Fig. 1
TABLE 1 : Items
Vent length *
Length [300] 11.8"
Length [600] 24.01"
Length [900] 35.4"
Adjustable Length [175-230] 6.9-9.1"
Adjustable Length [215-310] 8.5-12.2"
45º elbow
90º elbow
Male-male Adapter
Drain Tee
Straight Termination
L Termination
Reducer
Air Intake Pipe
Rain Cap
Support Strap
(2" clearance)
Base
Cap
Adapter A
Adapter B
FFTP300
FFTP600
FFTP900
FFTA200
FFTA260
FFTEL45
FFTEL90
FFTMM
FFTDP
FFT7U
FFT7U(L)
FFTRD
FFTAIP
FFTRT
FFTSTR
FFTRFB
FFTRFC
FFTRFAA
FFTRFAB
Condensation drain
Vent termination
Others
3801
3802
3803
3804
3805
3806
3807
3808
3809
3816
3817
3818
3819
3820
3821
3822
MPI P/N
Roof Flashing
* The values enclosed by [ ] are effective length (unit : mm).
Effective length means the length of pipe when it is connected with other pipes.
Refer to
TABLE 2
(page 46)
Straight
Adjustable
Elbow
Vertical
Horizontal
Vertical
Support
Roof
Members
Fig. 2
Fig. 2
Fig. 2
Fig. 4.4
Fig. 2
Fig. 3
(page 43)
Connection
and
detachment
Fig. 2
(page 42)
Fig. 2,3
Model
Number
Summary of Contents for MWH-180
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