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8
Installation of air-inlet grille
The angle of air-inlet grille should be parallel with that of air inlet direction, otherwise it will cause more noise. Example
shown to the right.
Duct Installation of Indoor Units:
1.Installation of the duct work:
With a square supply duct, the bore shouldn't be less than the sizes of air outlet duct.
2.Installation of the air return duct: Connect one side of the air return duct to the air return of the indoor units with rivets,
with the other side connected to air return shutter, as shown in Fig. 1.
3.Insulating Supply Ducts: Supply and return air ducts should be insulated.
Air inAir in
Correct Wrong
˃40in
(1000mm)
˃4in(100mm)
˃24in
(600mm)
Reserve 24in×24in
(600mm×600mm) access hole
4-Ø3/8"(M10)hanging bolt
8-Ø3/8"(M10) nut
8-Ø3/8"(Ø10) Washer
Level the unit within 0.2in(5mm).
If end A is to drain water, ensure end B is slightly higher than the end A
to facilitate drainage.
Otherwise, ensure end A is slightly higher than end B.
Installation Procedures
Electric control
enclosure
Installation space Installation mode
Air return shutter
Air return pipe
Indoor unit
Revit
Fig.1
Connection of oil return pipe
Model Ultra-Silent Silent Standard ESP default High ESP Super High ESP
Grade 1 2 3 4 5
This machine uses a DC motor. Multiple ESP adjustments are available. The factory default is standard ESP. The ESP &
Silent mode can be set according to the static pressure and the noise requirement. Setting ranges are as follows:
Operation:
YR-E17 wired controller: With the display on, press Fan + Set keys for 5s to enter static pressure set mode. The static
pressure icon will ash and current static pressure will display. Press ▼▲ key to change static pressure grade, then press
the Set key to conrm.
Note:
This series are low ESP duct, all the sets above must be handled by a wired controller.
Selection of fan outlet
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