YORK VRF Air-Conditioner IOM
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4.2 Install the suspension bolts
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Use a hole-in-anchor for existing ceilings, and a
sunken insert, sunken anchor or other part to be
procured in the field to reinforce the ceiling to
bearing the weight of the unit for new ceiling.
(Refer to Fig. 3)
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Note
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If the internal insulation material is PE, in
installation process, please take some preventive
measure to avoid brazing sparkle contacting the
insulation material, which may result in fire.
Fig. 3 Suspension Bolt Installation
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INDOOR UNIT INSTALLATION
5.1 Install the indoor unit temporarily
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Attach the hanger bracket to the suspension bolt.
Be sure to fix it securely by using a nut and washer
from the upper and lower sides of the hanger
bracket. (Refer to Fig. 4)
Fig. 4 Indoor Unit Suspension
5.2 Tighten the nuts and adjust the height of the
unit to reach the installation site
5.3 Check if the unit is horizontally
level
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Make sure that the unit is installed level using a
spirit level or a plastic tube filled with water. (Refer
to Fig. 5)
(One thing to watch out for in particular is if the
unit is installed so that the slope is not in the
direction of the drain pipe, which might cause
leaking.)
Fig. 5 Check Unit Level
5.4 Tighten the upper nuts
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Be sure the below washer and nut are installed
within the hanger bracket for fear of bolt rolling
out, this may result in danger.
6
REFRIGERANT PIPING WORK
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Execute insulation completely on both sides of the
gas piping and the liquid piping. Otherwise, water
leakage can result sometimes.
Please use the insulation materials that can
withstand temperature of at least 120°C. Reinforce
the insulation on the refrigerant piping according
to the installation environment. Otherwise,
condensate water may form on the surface of the
insulation.
Please follow the below items.
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Apply ester oil or ether oil to the flare section
(internal and external surface) when using a flare
connection.
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Only the flare nuts included with the unit can be
used. Using different flare nuts may cause
refrigerant leakage.
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To prevent dust, moisture or other contaminant
from infiltrating the piping, either pinch the end or
cover it with tape.
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Do not allow anything other than the designated
refrigerant to get mixed into the refrigerant circuit,
such as air, etc.
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When brazing the refrigerant piping, perform
nitrogen replacement first, or perform brazing
while feeding nitrogen into the refrigerant piping,
and finally connect the indoor unit using the flare
connections.
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When brazing a pipe while feeding nitrogen inside
the pipe, make sure to set the nitrogen pressure to
0.02MPa (0.2kgf/cm2) or less using the pressure
reducing valve.
(This pressure is just like breeze blowing to your
cheek.)
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CAUTION
CAUTION
CAUTION
