Refrigerant Piping & Refrigerant Charge - Hitachi UTOPIA IVX PREMIUM Manual De Instrucciones

REFRIGERANT PIPING & REFRIGERANT CHARGE
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Installing location where the unit will be exposed to strong wind
Follow the instructions below to
install on the rooftop or a location
without surrounding buildings, where
strong wind is expected against the
product.
1 Choose a location where the
outlet or inlet side of the product
will not be exposed to strong
wind.
2 When the outlet is exposed to
strong wind:
Direct strong wind may cause
lack of air flow and adversely
affect to the operation.
8 REFRIGERANT PIPING & REFRIGERANT CHARGE
8.1 PIPING MATERIALS
1 Prepare locally-supplied copper pipes.
2 Select the piping size with the correct thickness and correct
material which can have sufficient pressure strength.
3 Select clean copper pipes. Make sure there is no dust and
moisture inside. Blow the inside of the pipes with oxygen
free nitrogen to remove any dust and foreign materials
before connecting pipes.
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N O T E
• A system with no moisture or oil contamination will give maximum
performance and lifecycle compared to that of a poorly prepared
system. Take particular care to ensure all copper piping is clean and
dry internally.
• There is no refrigerant in the cycle of the indoor unit.
8.2 PIPING CONNECTION FOR OUTDOOR UNIT
1 The pipes can be connected from 4 directions. Make holes
in the piping cover or cabinet for taking out pipes. Take the
piping cover away from the unit, and make holes by cutting
along the guideline at the rear of the cover or punching
with a driver. Remove the burr with a cutter, and place a
insulation (field supplied) to protect cables and pipes.
9 PMML0397B rev.0 - 11/2015 - P5416650
!
• Cap the end of the pipe when pipe is to be inserted through a hole
• Do not put pipes on the ground directly without a cap or vinyl tape at
the end of the pipe
• If piping installation is not completed until next day or over a longer
period of time, braze off the ends of the piping and charge with
oxygen free nitrogen through a Schrader valve type access fitting to
prevent moisture and particle contamination.
• Do not use insulation material that contains NH3 because it can
damage cooper pipe material and can be a source of future leakage.
• Completely insulate both refrigerant gas piping and liquid piping
between the indoor unit(s) and the outdoor unit.
• If not insulated, dew will occur on the piping surface.
!
Notes to open/close the service cover:
(picture as example)
• Remove the screws following the instructions to the above figure.
• Slowly press down the cover.
!
C A U T I O N
Excessive strong wind against the outdoor
unit outlet may cause inverse rotation and
damage the fan and motor.
C A U T I O N
Nº Description
 Rear side piping work

Pipe Cover

Right side piping work

Bottom side piping work (Knock out hole)
 Front side piping work
 Piping work
 Stop Valve
 Removing Direction for Service Cover
C A U T I O N