Hitachi RPI-2.5FSN1E - Piping Connection for Outdoor Unit

16
PMGB0126A rev.2 - 11/2006
REFRIGERANT PIPING &
REFRIGERANT CHARGE
1. Stop Valve are located on rear exterior side of unit. Before
connecting refrigerant piping, the protection cover of stop
valve must be removed.
2. If the field-supplied piping is connected with stop valves
directly, it is recommended to use a tube bender.
3. For gas pipe connection, use the factory supplied Flange
Pipe (Only for RASC-10HNE).
Tightening Torque
See tighten torque in the next table:
Valve
Size Tightening torque (N.m)
Pipe size
Hexagonal Wrench (Allen)
(Hex1)
A B C
Liquid
5 HP Fig A 9.53 (3/8”) 4 mm 33~42 33~42 14~18
10 HP Fig A 12.7 (1/2”) 4 mm 40 15.5 9.8
Gas
5 HP Fig A 15.88 (5/8”) 10 mm 68~82 14~18 8~12
10 HP Fig B 25.4 (1”) 10 mm (*) 49 9.8
■
 CAUTION:
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.
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11.3. PIPING CONNECTION FOR OUTDOOR UNIT
Insulation material
Field Supplied
refrigerant pipe
Insulation material
Insulation material
Unit side
85
27
95
Ø25.4 ID (1")
Gas Valve
Liquid Valve
Plug
Tighten the cap with a
torque of (C)
Check Joint
(Only the Charging hose can
be connected)
Refrigerant Pressure
Seat Surface
(Fully closed position)
Flare
Tighten the cap with a
torque of (A)
Field-Supplied
Refrigerantion Pipe
Plug
Tighten the cap with a
torque of (B)
O-Ring
(rubber)
Hex1
(To open and
close spindle
valve)
Closed before
shipment
Spindle Valve
Counterclockwise - Open
Clockwise - Close
(Fig.A)
Hex1
(To open and
close spindle
valve)
Closed before
shipment
Spindle Valve
Counterclockwise - Open
Clockwise - Close
Check Joint
(Only the Charging hose
can be connected)
Tighten the cap with a
torque of (C)
Field-Supplied
Refrigerantion Pipe
O-Ring
(rubber)
Plug
Tighten the cap
with a torque of (B)
(Attach this after
work.)
Refrigerant Pressure
Flange
Tighten the cap with a
torque of (A)
(Fig.B)