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6. Fit the outdoor mounting bracket
behind the flue and secure to the
ground. Refer to the instructions
supplied with the bracket for details.
7. The base of the flue terminal must
be at least 250mm above the top of
the MVB and 900mm above the air
intake to the MVB. Use appropriate
lengths or adjustable length to
achieve the desired flue termination
height.
8. Secure the vertical sections to the
outdoor flue stand at least half way
up the total height of the flue using
the clamp supplied with the stand.
The stand may be cut to length.
9. Fit the vertical flue terminal (Top
Stub with Mesh) to the straight
section and secure with the clamp.
10. Fit the condensate trap to the condensate drain section and fill with water.
Refer to Fig 15 on page 44.
HORIZONTAL TERMINATING FLUES
Lubricant is available to lubricate the flue gaskets for ease of installation. DO NOT use soapy water.
CAUTION: Proper installation of flue is critical for the safe and efficient operation of the water heater.
Refer to
Table 17
on page 47 for maximum flue lengths and flue sizes. Under no circumstances is the
flue diameter size to be reduced.
1. Fit the flue adaptor to the flue outlet located at the bottom back of the water heater and secure with
the screw clamp (supplied).
2. Fit one of the flue condensate drain/port sections with the drain pointing towards the ground and
secure to the adaptor with the clamp.
Note: the clamp will only fit one way. DO NOT try to force the clamp to close. If it is not
closing, it is the wrong way. If forced, be careful to use a screwdriver to release the clamp
as the releasing pressure may cause injury if attempting to release by hand.
3. The second flue drain/port section will be used to analyse the products of combustion during
commissioning and the port must be a minimum of 300mm away from the water heater flue outlet.
Fit the drain/port section (with the port NOT pointing towards the ground), straight flue lengths
and/or elbows and run to the terminal location. Secure each joint with the clamp.
4. Horizontal flue runs must have an upward slope towards the flue terminal of not less 1 in 20 or
50mm per linear meter. The horizontal portions of the flue shall also be supported at maximum
1.5m intervals to maintain clearances and to prevent physical damage or separation of joints.
5. Use appropriate flue lengths or adjustable lengths to achieve the desired outcome. DO NOT cut
the flue.
6. Install a rust-resistant sheet metal backing plate against the outside face of masonry or other
surfaces subject to corrosion from flue condensate.
Fig. 15: Outdoor Vertical Flueing
44
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