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Refrigerant pipe installation
Refrigerant pipe work
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Use exclusive tools and accessories for R-410A to respond to pressure of the R-410A and prevent foreign substances from
entering into the pipes .
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The length of refrigerant pipe should be as short as possible and the height difference between the DVM Hydro unit /
Hydro unit HT and outdoor unit should be minimized .
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Piping work must be done within allowable piping length, height difference, and the allowable length after branching .
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The pressure of the R-410A is high . Use only certified refrigerant pipe and follow the installation method .
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Use clean refrigerant pipe and there shouldn’t be any harmful ion, oxide, dust, iron content or moisture inside pipe .
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Pipe work must be done aside from the product .
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After completing the pipe installation, calculate the additional amount of refrigerant according to method of each indoor
units and make sure to use R-410A refrigerant when charging . (Color of the R-410A refrigerant container is painted in pink .)
Model name of DVM Hydro unit
AM036CNBDCH
AM048CNBDCH
AM048CNBFCB
AM072CNBFCB
AM096CNBDCH
AM144CNBDCH
Amount of additional refrigerant
0 .6 kg (1 .3 lb)
0 .7 kg (1 .5 lb)
1 .2 kg (2 .6 lb)
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Do not use Flux when brazing the refrigerant pipes .
• The maximum number of the Hydro Unit HT connectable to one system(module) is 3 units .
• In case the capacity combination of the Hydro Unit HT/HE exceeds 50 % among the total indoor unit, please don’t put
the additional refrigerant .
• If you need to perform cooling refrigerant charging mode with R-410A outdoor unit, the Hydro unit HT will not operate
if the water temperature is below 33 ºC (91 .4 ºF) . Make sure to raise the water temperature above 33 ºC (91 .4 ºF) before
conducting cooling refrigerant charging mode .
Alternatively, you can proceed with heating refrigerant charging mode .
• If you need to perform pump down operation, the Hydro unit HT will not operate if the water temperature is below
33 ºC (91 .4 ºF) . Make sure to raise the water temperature above 33 ºC (91 .4 ºF) before conducting pump down
operation .
• All other indoor units should perform the heating or stop, when R-134a refrigerant collecting operation .
CAUTION
DB68-12327A-00_IM_DVM Hydro HT_AA_EN_.indd 14
DB68-12327A-00_IM_DVM Hydro HT_AA_EN_.indd 14
2023-06-15 오전 10:37:23
2023-06-15 오전 10:37:23
