User Manual

11
3. Install the ducts.
 Use elbow as less as possible in the pipeline, and design the bending part of the
elbow in an arc shape (90° right angle bending should be avoided). See Figure 5.
(1) Excessive bending;
(2) Multi-bending
(3) Reduce the connecting pipe diameter
Figure 5 Duct layout
 Note to avoid excessive bending, multi-bending, reducing the duct diameter and
bending near the outlet when connecting the duct; to avoid air leakage, wrap the
joint of the duct flange and the duct with aluminum foil; keep the indoor air inlet as
far as possible from the air outlet.
 Install the outside duct at a fixed angle of inclination to prevent rainwater from
flowing back. To prevent condensation, cover heat insulating material for outside
ventilation ducts (e.g., rubber and plastic insulation boards). If the humidity is too
high in the ceiling, make sure that the inside ventilation ducts are insulated too.
See Figure 6.
Pipe cover
Slope
Insulation material
(Insulation work also required for the
interface and aluminum foil tape)
Fresh air pipeline and discharge duct
Adhesive
tape
Figure 6 Ceiling installation
 If the user hopes to minimize the indoor noise, consider connecting a duct silencer
in series in the duct. There are a great variety of silencers. Select one under
instructions of a professional. The noise at the air outlet of the machine can be
reduced by 4 to 6 dB when a proper silencer is installed.
 During installation, usually the duct is extended to the room, the air outlet is near
Prohibited
Prohibited
Prohibited