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Refrigerant pipe installation
Refrigerant pipe work
f 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.
f The length of refrigerant pipe should be as short as possible and the height difference between the DVM Hydro unit and
outdoor unit should be minimized.
f Piping work must be done within allowable piping length, height difference, and the allowable length after branching.
f The pressure of the R-410A is high. Use only certified refrigerant pipe and follow the installation method.
f Use clean refrigerant pipe and there shouldn't be any harmful ion, oxide, dust, iron content or moisture inside pipe.
f Pipe work must be done aside from the product.
f 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
Amount of additional refrigerant
f Do not use Flux when welding the refrigerant pipes.
Tools used for refrigerant pipe installation
Product using R-410A refrigerant requires exclusive tools. Check the conventional tools for compatibility before installation.
Tool
Pipe cutter
Flaring tool
Refrigerating machine
oil
Torque wrench
Pipe bender
Nitrogen gas
Welder
Manifold gauge
Refrigerant charging
hose
Vacuum pump
Scale for refrigerant
charging
Gas leak detector
Flare nut
DVM HYDRO UNIT_IM_E_03469A(1).indd 9
ADN160BDEH✴
0.3kg
Work
Pipe cutting
Pipe flaring
Apply refrigerant oil on
Refrigerant pipe work
flared part
Connect flare nut with
pipe
Pipe bending
Inhibition of oxidation
Air tightness test
Pipe welding
Air tightness test ~
Vacuuming, charging and
additional refrigerant
checking operation
charging
Compatible (Use products which contains the check valve to prevent the oil
from flowing backward into the outdoor unit.)
Vacuum drying
Use the one that can be vacuumed up to 100.7 kPa (5 Torr).
Compatible
Gas leak test
Must use the flare nut equipped with the product.
Refrigerant leakage may occur when the conventional flare nut for R-22 is used.
ADN320BDEH✴
0.7kg
Compatibility with conventional tool
Compatible
Use exclusive ether oil, ester oil, alkali benzene
oil or mixture of these oils
Compatible
Need exclusive one to prevent mixture of R-22
refrigerant oil use and also the measurement is
not available due to the high pressure.
Need exclusive one due to the refrigerant
leakage or inflow of impurities.
Need exclusive one
(Ones used for R-134a is compatible)
ADN500BDEH✴
1.2kg
9
2012-11-21 오후 2:32:19
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