York MOL/MOM 25, Техническое руководство

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8 CASSETTE
YORK CASSETTE (EN) 035T76015-000
7 - REFRIGERANT PIPING CONNECTIONS
Prefabricated refrigerant piping is available as an accessory. If this is not used, piping and insulating materials
employed must be compatible with this type of installation.
The pre-charged outdoor unit does not require charging if piping length is 5 m or less. However, the inter- connecting
piping and the indoor unit must be pumped down before releasing R407C refrigerant into them from the outdoor
unit.
1 - Remove the cap from the service valve.
2 - Connect the line to a vacuum pump and pump down to 5 Pa.
3 - When pump down is finished, wait 15 minutes to detect potential circuit leakage. Open service valves
on the outdoor unit.
Table 2 - Maximum piping lengths
Note : Where the difference in elevation is greater than
5 meters, install an oil trap every 5 meters.
Unit size
D (m)
L (m)
H (m)
25 35 45 55
20 20 24 24
25 25 30 30
22 22 26 26
Indoor unit
Gas line
Liquid line
R407C
Outdoor unit
* Note : The expansion device is located in the outdoor unit.
If piping length exceeds 7.5 meters, add 40g of refrigerant
R407C per extra meter.
Low pressure High pressure
Manifold
Pressure tap
Liquid valve
Gas valve
L
L
H
D
02_MKL-MKM.p65 13/6/02, 11:08 am 8