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14 31-5000474 Rev. 1
ENGLISH
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 in Fig. 1.
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:
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 flash and current static pressure will display. Press key to change static pressure grade, then press the
Set key to confirm. Note: These are medium ESP ducted units so all the settings above must be done through a wired
controller.
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
condensate.
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.
Air return shutter
Air return pipe
Indoor unit
Revit
Connection of air return pipe
Model Ultra-Silent Silent Standard ESP default High ESP Super High ESP
Grade 1 2 3 4 5
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