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INSTALLATION INSTRUCTIONS
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 below.
3. Insulating Supply Ducts: Supply and return air ducts should be insulated.
Selection of Fan Outlet:
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:
Grade
1
2
ESP/Pa
0
40
Operation:
YR-E16B wired controller: With the display on, press the Menu key to enter the menu interface. Press Installers Settings
key to enter the installation settings interface. Then select Special Settings and enter password: 841226. ESP is the
corresponding static pressure gear number function. When the left and right arrows are flashing, press the Enter key to
confirm. When the left and right arrows are still, press left and right keys to adjust. After adjustment, press Enter
to confirm.
Installation of Drain Hose:
Connection of indoor drain hose
1. Please use the accessory drain hose to connect indoor unit's condensate outlet and PVC pipe. Use snap rings to tighten
them as shown in the figure on the next page.
2. Please use rigid PVC adhesive for connection of other pipes and ensure there is no leakage.
3. Drain hose must be wrapped with insulation sleeve and tightened with a strap to prevent air leakage from producing
condensation.
4. Drain hose should decline to the drainage side with an inclination of above 1/100 to prevent water flowing back into air
conditioner when the unit stops running. Drain hose expansion or water accumulation should be prevented, or else it
will cause abnormal noise.
5. Do not pull on the drain hose when making the connections to avoid the pipe connections from getting loose or
disconnected. Drain hose should not be pulled out laterally for more than 8in (200mm) and should be supported every
31-39in (0.8-1.0m) to avoid bending.
6. The end of drain hose should be more than 2in(50mm) away from the ground or the bottom of drainage tank. It should
not be put in water. To directly drain condensation into a drain line; the drain hose must be trapped (U-shaped) to avoid
sewer smell from entering through the hose into room.
14
Air return pipe
Air return shutter
Connection of air return pipe
3
4/ Standard ESP
70
100
Indoor unit
Revit
5
6
7
8
9
120 150 170 190
210
10
11
230
250
31-5000553 Rev. 1
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