36
PMML0129A rev.4 - 02/2010
(b) Bottom Side Piping Work
After removing bottom of the piping cover, perform piping
and wiring works.
NOTE:
Prevent the cables from coming into direct contact
(c) Rear Piping Work
After removing rear piping cover, punch out the “C” holes
along the guide line.
C
NOTES:
To avoid damage protect cables and pipes with adequate
insulation (Field-Supplied).
−
After connecting the refrigerant piping, seal the open space
between knockout hole and refrigerant pipes by using
insulation material.
−
Confirm that the valve is closed.
−
Prepare a field-supplied bend pipe for liquid and gas line.
Connect it to the liquid valve by flare nut through the square
hole of bottom base.
12.1.4. TIGHENING
Tightening work on the flare nut
Liquid Piping
Conduit
Gas Piping
Bottom Side Piping Hole
Bottom Base
Piping Cover
Screw
Rear cover
Flate nut
connection
of indoor
unit slide.
Two spanners work
Never apply
a force here
by spanner. If
not, refrigerant
leakage may
occur
Stop valve of Outdoor unit
Stop valve
Flare nut
Operation of stop valve should be performed according to the figure below.
Unit
Valve
Size (mm)
Tightening torque (N.m)
Type
Pipe
Hexagonal Wrench
(Hex1)
A
B
C
RAS-8
Liquid
Fig. A
Ø9.53 (3/8”)*
4
40
37
16
Gas
Fig. B
Ø25.4 (1”)
10
53 to 75
30
13
RAS-10
Liquid
Fig. A
Ø12.7 (1/2”)
4
60
37
16
Gas
Fig. B
Ø25.4 (1”)
10
53 to 75
30
13
RAS-12
Liquid
Fig. A
Ø12.7 (1/2”)
4
60
37
16
Gas
Fig. B
Ø25.4 (1”)
10
53 to 75
49
13
(*) Select the piping size of the Ø12.7 (1/2”) when the length is more than 70m (Only RAS-8)
Fig. A
Fig. B
CAUTION:
Confirm that there is no refrigerant leakage of the piping connections.
Do not apply force to the spindle valve at the end of opening (5 N.m or smaller). The back seat construction is not provided.
At the test run, fully open the spindle. If not fully opened, the devices will be damaged.
CAP
Tighten the cap with
a torque of (C)
Check joint
(Only the Charging those
can be connected)
Refrigerant
Pressure
Seat surface
(Fully closed
position)
CAP Tighten the cap
with a torque of (A)
Closed before shipment
Spindle Valve
Counterclockwise - Open
Clockwise - Close
Hex
→
1
(To open or
close spindle
valve)
CAP
Tighten the cap with
a torque of (B)
Refrigerant Piping
(Field supplied)
O-Ring
(rubber)
Tighten the cap with
the torque of (B)
Check Joint
Only the charging hose can
be connected. Tighten the
cap with the torque of (C)
O-Ring
(rubber)
Flare Nut
Connection Ø19.05
Accessory
pipe
Field Refrigerant
piping brazing
connection
Refrigerant
Pressure
Tighten the
flare nut with
the torque
of (A)
Do not apply two
spanners at this
portion. If applied,
leakage will occur.
Use two
spanners here to
squeeze flare nut
Use this accessory pipe for the regrigerant
piping work. If not, the operation sound
of the indoor units may be increased
depending on the installation conditions
and field-supplied refrigerant piping can
not connect to the outdoor unit gas valve.
Stem
Pin
Stopper
Ring
Stem position at open
Stem position
at close
Pin
Stopper
Ring
Attaching Detail for ring
PIPING AND
REFRIGERANT CHARGE
