Hitachi RAS-(2-3)HVRN(S)(2), Руководство по обслуживанию

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3 Piping work and
refrigerant charge
62
SMGB0064 rev.0 - 08/2011
To use racking or conduit tubes, check the size and remove the stiped parts, following the slit.
N O T E
Place insulation (field supplied) to protect cables and pipes from being damaged by plate edges.
•
For the downward piping
1. Liquid piping.
2. Wiring.
3. Gas piping.
4. Knock-out hole.
5. Bottom base.
N O T E
The wiring must not be in contact directly with the pipes.
•
For the rear side piping
1
2
3
5
4
1. Rear cover.
N O T E
Remove the rear pipe cover under the rear cover and remove
the stipped part following the slit.
2 Mount the piping cover in order to avoid water entering into the
unit. Seal the holes where pipes and wires are inserted, by us-
ing an insulation (field-supplied).
3 If the field-supplied piping is connected with stop valves di-
rectly, it is recommended to use a tube bender.
4
Check that the stop valves are closed completely before con-
necting pipes.
5 Connect the field supplied refrigerant pipes to the indoor unit
and outdoor unit. Apply the oil thinly at the seat flare nut and
pipe before tightening.
1
A
The required tightening torque is as follows:
Pipe Size Tightening Torque (Nm)
Ø 6.35 mm 20
Ø 9.53 mm 40
Ø 12.70 mm 60
Ø 15.88 mm 80
6 After connecting the refrigerant piping, seal the open space between knockout hole and refrigerant pipes by using the
insulation material.