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Flue Duct Installation of Forced‐Exhausted Gas Water Heater (B
23‐53
type)
This product is forced exhaust type gas water heater; it can be used only after the flue duct is
installed according to the requirements strictly and can exhaust the waste gas to the outdoor
area. It’s not allowed to use the gas water heater without installing the flue duct correctly.
Please follow the below requirements during the installation of flue duct:
(1)
Please use the flue supplied by our company, referring to Fig. 11 about the installation
method. If the flue duct is too short, you can extend it aptly. Check the flue duct and see if there
is any damage or leakage every half a year.
(2)
The length of the flue gas exhaust pipe must be a maximum of 6 linear meters. The pressure
losses are calculated considering that nr.1 curve 90 ° is equivalent to 1 m of straight pipe, while
nr.1 curve at 45 ° is equivalent to 0.5 m of straight pipe; use a maximum of 3 90 ° bends for each
drain.
(3)
The horizontal distance of the flue duct is the shorter the better. The flue duct end should
have a 2
0
downward inclination (Fig. 11), so as to let the condensing water flows out.
(4)
The distance between the flue duct and the combustible materials should be more than
150mm. If the flue duct needs to get through the combustible materials or wall, it should use the
heat shield material to pack the flue duct with the thickness over 20mm.
（
Refer to Fig. 7
）
(5)
No cement between the flue duct and wall for the convenience of maintenance.
(6)
The flue duct should be fixed tightly. The connection part could use self‐adhesive foil to avoid
the waste gas going back into the room.
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