York YKHC 18 Service Manual page 36

3. Indoor unit installation YKHC-24~48
(1) Install the main body
A. The existing ceiling (to be horizontal)
a. Please cut a quadrangular hole of 880X880mm in the ceiling according to the shape of the installation paper
board. (Refer to Chart3,4)
The center of the hole should be at the same position of that of the air conditioner body.
Determine the lengths and outlets of the connecting pipe, drain pipe and cables.
To balance the ceiling and to avoid vibration, please enforce the ceiling when necessary.
b. Please select the position of installation hooks according to the hook holes on the installation board.
Drill four holes of
expansible hooks(fittings).
Face the concave side of the installation hooks toward the expansible hooks. Determine the length of the
installation hooks from the height of ceiling, then cut off the unnecessary part.
If the ceiling is extremely high, please determine the length of the installation hook according to facts.
The length could be calculated from Chart5:
Length=H-181+L(in general, L is half of the whole length of the installation hook)
c. Please adjust the hexangular nuts on the four installation hooks evenly, to ensure the balance of the body.
If the drainpipe is awry, leakage will be caused by the malfunction of the water-level switch.
Adjust the position to ensure the gaps between the body and the four sides of ceiling are even.The body's
lower part should sink into the ceiling for 10~12mm (Refer to chart5).
Locate the air conditioner firmly by wrenching the nuts after having adjusted the body's position well.
Drain side A
780(Hook-location)
840(Body)
880(Ceiling hole)
950(Panel)
Chart 3
12mm, 45~50mm deep at the selected positions on the ceiling. Then embed the
Tubing side
Body
Nut
Ceiling
MCA-18H(C)R 24000`30000Btu/h
Note:
36000~48000btu/h.
A
880mm
Chart 4
34
B=240mm
B=310mm
Hook
Panel