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Refrigerant pipe work on DVM Hydro unit HT
DVM Hydro unit HT has refrigerant pipes of two different types.
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Liquid side pipe
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Gas side pipe
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Make sure there are no foreign substances and impurities in the pipe.
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There is no nitrogen gas inside of connected pipes of Hydro unit HT and the outdoor unit.
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DVM Hydro unit HT is using the new refrigerant, R-134a. The connected pipes of Hydro unit HT and the outdoor
unit are using R-410A
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The product performance or reliability can have grave consequences.
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The design pressure is 4.1 MPa, and make sure to consider selecting the refrigerant pipes which meet the
standard(material, thickness)
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Make sure to use liquid refrigerant when charging the refrigerant, because the using refrigerant is mixture
refrigerant.
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DVM Hydro unit HT is using heat exchanger of plate type, and make sure to consider installation location to
connecting water pipes.
CAUTION
1. Remove the safety cap of the refrigerant pipe and fasten the nuts after
connecting refrigerant pipes to each port of the Hydro unit HT.
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Make sure to fasten the nut using hand of person first, after that use tools
like torque wrench and spanner.
Gas side
Liquid side
2. Wrap the refrigerant pipes with insulator.
3. Cut the rest of insulator.
4. Make sure to check any defects on the bent parts of the pipes.
5. The standard temperature and humidity condition is 30 °C with humidity
below 85 %. If the condition is in high humidity, use one grade thicker.
(Over 10 mm)
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