Refrigerant Piping
na3051a
Dimensions in mm (in).
Model | PA211 | PA311 | PA452 | PA612 | PA862 |
1 circuit | 1 circuit | 2 circuits | 2 circuits | 2 circuits | |
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Pressure Line | 16 mm (5/8 in) | 22 mm (7/8 in) | 16 mm(5/8 in) | 22 mm (7/8 in) | 22 mm (7/8 in) |
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Liquid Line | 12 mm (1/2 in) | 16 mm (5/8 in) | 22 mm (7/8 in) | 16 mm (5/8 in) | 16 mm (5/8 in) |
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Considerations
The refrigerant connections are located near the compressor and are labelled pressure pipe and liquid pipe. Models containing two circuits will be labelled pressure pipe 1 and pressure pipe 2.
To ensure oil return in ascending hot gas lines, particularly at partial load, the minimum refrigeration capacity must not fall below the value on the table below.
Minimum refrigeration outputs required for oil transportation in rising pressure lines for
R407C refrigerant at dew point of 48°C (118.4°F)
Pipe Diameter | 15 | (5/8) | 18 | (3/4) | 22 | (7/8) | 28 | (1 1/8) | 35 | (1 3/8) | 42 | (1 5/8) | |||||||
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Refrigerant Capacity | 4.41 | (15) | 5.17 | (17.7) | 7.14 | (24.4) | 10.0 | (34.2) | 16.58 | (56.6) | 25.9 | (88.4) | |||||||
kW (MBH) | |||||||||||||||||||
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The horizontal lines must always be routed with a slope towards the condenser. |
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Establish the shortest route for pipework from the unit to the condenser. |
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InRoom Precision AC Tech Data Manual | 73 |
