York JDOH Series, Original Instructions Manual, Page: 22 / 36

15
5.4 Air Tight Test
(1) The stop valve has been closed before
shipment, however, make sure that the stop
valves are closed completely.
(2) Connect the indoor unit and the outdoor
unit with field-supplied refrigerant piping.
Suspend the refrigerant piping at certain
points and prevent the refrigerant piping
from touching the weak part of the building
such as wall, ceiling, etc.
(If touched, abnormal sound may occur due
to the vibration of the piping. Pay special
attention in case of short piping length.)
(3) Apply the oil thinly at the seat surface of the
flare nut and pipe before tightening.
And when tightening the flare nut, use two
spanners.
Refrigerant Oil is field-supply.
Model: FVB68D (Ether Oil)
Manufacturer: IDEMITSU KOSAN Co., Ltd.
Completion
of Ref.
Piping
Repairing
of Leakage
Part
Check of
Pressure
Decrease
Applying
Nitrogen
Gas
Pass
Procedure
NOTE:
To avoid damage protect cables and
pipes with adequate insulation (Field-
Supplied).
To prevent gaps use a rubber bush and
insulation (Factory-Supplied) adequately
when installing the piping cover. Cut the
lower side guide line of the piping cover
when attaching work is difficult. If not, it will
be included water in the unit and electrical
parts will be damaged.
Use a pipe bender or elbow (Field-
Supplied) for bending work when
connecting pipe.
(c) Rear Piping Work
After removing rear piping cover, punch
out the “C” holes along the guide line.
Rear Cover
C
(4) Stop Valve
Operation of the stop valve should be
performed according to the below.
<Gas Valve>
<Liquid Valve>
Spindle Valve Torque (N-m)
Gas Liquid
Hexagonal Wrench Size (mm)
Gas Liquid
4
l
Do not apply an abnormal big force to
the spindle valve at the end of opening
(5.0N-m or smaller).
The back seat construction is not provided.
l
Do not loosen the stop ring. If the stop ring
is loosened, it is dangerous, since the
spindle will hop out.
l
At the test run, fully open the spindle.
If not fully opened, the devices will be
damaged.
(5)
(6)
8
8