Service manual

B
ACDEFGSERVICE
13
B12 Ducting
This gas re requires a small network of ducting situated in either the ceiling or under the
oor to distribute heat generated by the appliance.
A centrifugal fan (separate purchase) is connected to the duct system and this draws air
through the appliance where it is heated, and then distributes it via the ducting network.
The centrifugal fan is powered by the appliance. When placing outlets in rooms other
than the room the appliance is installed, it is important to allow for return air to
equalise pressure between the rooms.
Caution: Provision must always be made for return air from heated rooms
e.g. undercut doors or natural leakage.
WARNING: OVERHEATED ROOMS ARE NOT SAFE FOR INFANTS
DX res require a minimum of three outlets in the ducting system to be fully open at all
times. At least two of those outlets must be present in the same room that the re resides
in. There can be a maximum of 5 outlets for the DX1000 and 8 outlets for the DX1500. A
standard duct kit (separate purchase) has provision for the three minimum outlets - You
can use your own ductwork and outlets, but you must ensure they are rated to tempera-
tures of at least 90 degrees Celsius and have an appropriate R-value.
Ductwork must be adequately sized to avoid excess backpressures. Inadequate duct sizes
will cause unnecessary fan noise and premature fan failure.
We recommend removing the close aps from at least three of the duct outlets to pre-
vent unnecessary back pressure and fan noise.
Ductwork must not be crushed or exposed to excessive heat sources.
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Note: If duct backpressure is too great, the appliance can shut down due to overheating.
This ducting fan will generate mechanical noise. Ideally it must be installed in a position where
noise will not interfere with daily activities. All air ducts will make noise no matter how well the
system is designed. Increasing the number of outlets is a simple strategy to reduce this noise.