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Allowable refrigerant piping length and height difference a. Allowable pipe length and height difference Single way total pipe length 300m Single way max. pipe length Max. 150m Main pipe between outdoor to 1 branch Max. 90m Pipe length between outdoors Less than 10m to 1 branch pipe Height difference between indoor and...
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outdoor1 outdoor 2 outdoor 3 outdoor1 outdoor3 outdoor2 Installation at high difference: outdoor1 outdoor2 outdoor3...
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outdoor3 outdoor2 outdoor1 Oil trap (upright projecting pipe, 200mm high), as the figure: outdoor2 outdoor3 outdoor1 Below is forbidden (compressor oil will flow into the lowest outdoor). outdoor3 outdoor2 outdoor1...
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c. Allowable pipe length and height difference outdoor1 when the distance between outdoors is over 2m, the oil trap must be set (upright projecting pipe, 200mm high) outdoor2 outdoor3 below 2m below 2m over 200mm over 200mm L1 < 10m L2+L3 <...
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(2) Pipe specification: outdoor gather pipe the first branch a. Pipe “a” diameter (between indoor and branch pipe) (depends on indoor pipe, for wall mounted unit, please refer to its specification) Indoor(×100W) Gas pipe Liquid pipe 22~28 φ9.52 φ6.35 36~56 φ12.7 φ6.35 71~140...
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Pipe dimension among outdoors (1) Outdoor pipe dimension 18~32HP 34~48HP Liquid pipe Liquid pipe Gas pipe Gas pipe The pipe “a, b, c, d” should be confirmed as to the below table. Former outdoor capacity Liquid pipe (a, c) Gas pipe (b, d) ~68.0KW φ15.88 φ28.58...
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c. Apply the pressure to the target pressure (4.05MPa), record the temp. and the pressure. d. Leave it at 4.05MPa for over 1 day, if pressure does not go down, the test is passed. Meanwhile, when the temp. changes for 1degree, pressure will change 0.01MPa as well. Correct the pressure.
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6.8 Wall mounted unit installation Please read these "Safety Precautions" first then accurately execute the installation work. The precautionary points indicated herein are divided under two headings: WARNING and CAUTION those points which are related to the strong possibility of an installation done in error resulting in death or serious injury are listed in the WARNING section.
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PRECAUTION Execute proper grounding. Do not connect the earth wire to a gas pipe, water pipe, lightening rod, or a telephone ground wire. Improper placement of earth wires can result in electric shock. An electric leakage breaker must be installed, otherwise electric shock or other accidents would occur.