McQuay MCK030A Manual de instalación descargar pdf (Pagina 38)

Page 37

Refrigerant Piping Work

Refrigerant piping is important in particular. Refrigeration cycle of the split air conditioner is realized by the perfect

piping work.

Piping length and elevation

If the piping is too long, both the capacity and reliability of unit will drop. As the number of bends increase, resistance

to ﬂ ow of refrigerant system increases, thus lowering cooling capacity and as a result the compressor may become

defective. Always choose the shortest path and follow the recommendation as tabulated.

Model

Number

MWSC

010B/BR

MWSC

015B/BR

MWSC

020B/BR

MWSC

025B/BR

MWSC

030B/BR

MWSC

050B/BR

Max. Length, L 7m 10m 15m 15m 20m 20m

Max. Elevation H 5m 8m 8m 8m 10m 10m

Max. No. Of bends 10 10 10 10 10 10

Liquid pipe size 1/4” 1/4” 1/4” 3/8” 3/8” 3/8”

Gas pipe size 3/8” 1/2” 5/8” 5/8” 5/8” 3/4”

t For cooling unit, need to add external accumulator (recommended 6kg accumulator).

Liquid check trapper

Max. height

A. Outdoor lower than indoor unit

Indoor unit

B. Outdoor unit higher than indoor unit

Outdoor unit

Indoor unit

Gas pipe

Liquid pipe

Note

Outdoor unit

(Set one per six meter)

Oil trapper

Installation of pipe

All system piping should be installed in accordance with local ordinances. The piping should be designed with a

minimum number of bends and changes in elevation to keep costs to a minimum and unit performance to a maximum.

A good installation should include the followings:

ó Vibration eliminators to reduce vibration and noise transmission to the building.

ó Shut-off valves are required to isolate the unit from the piping system during service.

ó Manual or automatic air vent valve at the high points of the system.

ó Some means to maintaining adequate system pressure (e.g. regulating valve and /or expansion tank )

ó Install temperature and pressure indicators at the unit pipe to aid in servicing and troubleshooting

ó Install a strainer to remove foreign matter from the water before it enters the pumps, it should be located far

enough from the upstream of pump to prevent cavitation at the inlet.

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McQuay MCK030A Manual de instalación Pagina 38

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