Haier AU482FIBHA - Page 11

10
Adding R407C refrigerant
Refrigerant must be added in liquid state.
Refrigerant bottles with or without a siphon tube can
be refilled withr refrigerant upright or upside down,
respectively.
Containers for R407C refrigerant must be marked
with R407C and a brown stripe.
R407C and R22 refrigerants can not share the
same instrument distributor and filling pipes.
50m
35m
15m
Piping part
L2+c
Longest piping L
Piping length of indoor unit which is furthest to the first
branch piping L
Drop height between indoor and
outdoor unit H
Drop height between indoor units h
30m
20m
10m
L1+L2+a+b+c
L1+L2+c
Piping length
Total length of piping (actual length)
Permissible value
Actual length
Drop height
Up outdoor
Under outdoor
Using Oxygen and/or inflammable or toxic gas is prohibited
Warning
100m
70m
30m
Piping part
L2+L3+L4+e
Longest piping L
Piping length of indoor unit which is furthest to the first
branch piping L
Drop height between indoor and
outdoor unit H
Drop height between indoor units h
30m
20m
10m
L1+L2+L3+L4+a+b+c+d+e
L1+L2+L3+L4+e
Piping length
Total length of piping (actual length)
Permissible value
Actual length
Up outdoor
Under outdoor
Copper pipe
Expanding nut
Plug (Copper)
Installation Procedures
Connecting piping
AU242~342 type: Maximal length and drop height permissible of refrigerant piping
N
1
2
L
V
H
V
INDOOR UNIT
Reducing joint
Copper pipe 6.4
Instrument
distributor
Pressure
reducing
valve
valve
Nitrogen
Bottle
AU482~522 type and AU48~60 type: Maximal length and drop height permissible of refrigerant piping
Drop height
4. Pipes connecting the outdoor and indoor units must be blown clean.
Compressed air is used to remove all foreign articles from the inside of pipes. Compared with R22,407C refrigerant
is more likely to be affected by moisture, oxides, dust and grease. Special care Hould be taken to avoid contamination
from these materials in the pipes. The following process should be used for pipe cleaning.
1) Relief valve on the Nitrogen bottle
(Gaseous refrigerant may condense, and oxygen and inflammable gas may cause explosions.)
2) Connect the outdoor unit gas pipes and liquid pipes to the low and high pressure joints on the instrument distributor.
3) While cleaning the indoor unit, all other pipes on the sides of
the indoor unit should be fitted with plugs.