12
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 /
Hydro unit HT 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
ADN160BDE
✴✴
AM160FNBD
✴✴
AM
✴✴✴
FNBF
✴✴
ADN320BDE
✴✴
AM320FNBD
✴✴
ADN500BDE
✴✴
AM500FNBD
✴✴
Amount of additional refrigerant
0.6 kg
0.7 kg
1.2 kg
f
Do not use Flux when welding the refrigerant pipes.
t
In case the capacity conjunction of the Hydro Unit HT exceeds 50 % among the total indoor unit, please don’t
put the additional refrigerant.
t
When operate Hydro unit HT to add R-410A refrigerant at the outdoor unit side, Hydro unit HT will not work for
cooling refrigerant charging operation if water temperature is under 33°C. Peform heating refrigerant charging
operation or perform cooling refrigerant charging operation after warming water up over 33°C.
t
When operate Hydro unit HT to collect R-410A refrigerant at the outdoor unit side, Hydro unit Ht will not work if
water temperature is under 33°C. Perform refrigerant collecting operation after warming water up over 33°C.
t
All other indoor units should perform the heating or stop, when R-134a refrigerant collecting operation.
CAUTION
Important information regulation regarding the refrigerant used
f
DVM Hydro unit HT contains fluorinated greenhouse gases covered by the Kyoto Protocol.
f
Hermetically sealed system.
f
Do not vent gases into the atmosphere.
f
Refrigerant type : R-134a
f
Quantity: 2.15 kg
f
Global Warming Potential(GWP) = 1300
k}tGokyvGo{ptXYWZ`]]hTXluUGGGXY
YWXZTW_TW]GGG㝘㤸G`a[[aY]
