Drain Piping Work; Installing The Duct - York YDCC06-45 Installation Manual

polythylene materials.
z Be sure to insulate the field piping all the way to
the piping connection inside the unit. Any exposed
piping may casue condensate water or being
burned if touched.

7 DRAIN PIPING WORK

z Drain pipe connection diameter may vary
depending on different models. It can be divided as
free drainage and pump drainage. So please
confirm the model name and use the right method
for that model.
z Be sure the drain pipe works well and smothly
before making the duct connection. (It is not easy
to check the drain pipe when the duct has been
connected.)
7.1 Install the drain pipe
z Make sure the drain works properly.
z Diameter of the drain pipe should be larger than or
equal to the one of the connecting pipe. (drain pipe
connection diameter of indoor unit is 3/4"
(19.05mm))
z Make a water trap on the drain pipe outlet from
indoor unit. The water trap should meet below
requirements. (A, B
Fig. 7 Water Trap
z If central drain pipe has been used, keep the drain
pipe short and sloping downwards at a gradient of
at least 2/100 to prevent air pockets from forming.
(Refer to Fig. 8)
z Select central drain pipe of proper size according to
the total capacity of the connected unit.
>100mm
Fig. 8 Central Drain Pipe
z For the indoor unit with pump drainage
(a) Be sure the drain raising pipe height is within
700mm.
(b) Place the drain raising pipe vertically and make
sure it is no further than 300mm. (Refer to Fig.
8)
(c) The spare drain hole also needs to be
50mm)
Central drain pipe
YORK VRF Air-Conditioner IOM
thoroughly insulated to avoid accumulating of
condensate water.
Fig. 9 Pump Drainage
z To prevent the drain pipe from sagging, install
hanging bracket every 1~1.5 m.
z When connecting the drain pipe, effective method
should be carried out to guarantee no leakage on
each connection area.
z To avoid condensate water accumulating on the
drain pipe and dropping down, the drain pipe
should be insulated.
7.2 Check the drain pipe
z After piping work is finished, check if drainage
flows smoothly.
(a) Free drainage
Gradually insert approximately 1000 ml clean
water into the drain pan to check drainage
status.
(b) Pump drainage
Remove the lid of the control box. Connect
the relevant power supply and ground lines,
then close the lid.
Gradually insert approximately 1000 ml clean
water from the fin coil side.
Power on the unit and inspect the drain
pump working status.
NO
CAUTION
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z The electric wiring works should be performed by
specially qualified electricians.
z If no electricians in site, please flow the above
steps to do drainage confirmation after the system
test running.

8 INSTALLING THE DUCT

z Materials for duct installation are supplied in the
field.
z Refer to Fig. 10 to connect the duct.
6