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Pipework Installation
!
When installing the pipework it is essential that the following points are adhered to:
(i)
Cleanliness is essential – keep the pipework securely sealed at all times during the installation.
(ii) No sight glass should be fitted to the liquid pipe.
(iii) Do not incorporate an oil trap in vertical pipework.
(iv) Displace all air with oxygen-free-nitrogen.
System Purging
When removing air and dehydrating refrigerant pipework, use an approved type of vacuum pump
!
only. Do NOT use the factory charge to purge the air.
!
Ensure a vacuum is drawn at -76cmHg (-1.013 x 10
Heat Insulation
Provide heat insulation on the refrigerant piping on both the liquid side and gas side separately,
!
and ensure that all joints in the insulation are vapour sealed.
Since the temperature of the piping on the gas side increases during heating operations, the heat
!
insulating material used must be able to withstand temperatures of more than 120
Use the pipe insulation supplied in the accessory pack to insulate the piping connecting section
!
on the indoor unit side.
R
P
EFRIGERANT
IPING
5
Pa) at both the liquid and gas sides.
~ 25 ~
GB
°
C.
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