Guidelines To Install Safety Valves; Guidelines To Install Blow Off Piping; Checking The Refrigerant Piping - Daikin CO2 Conveni-pack LRYEN10A7Y1 Installer And User Reference Manual

16.3.8 Guidelines to install safety valves

16.3.9 Guidelines to install blow off piping

16.4 Checking the refrigerant piping

LRYEN10A7Y1+LRNUN5A7Y1
CO₂ Conveni-Pack outdoor unit
4P605460-1 – 2020.08
When brazing
Flow direction
(a)
Follow the instructions in the installation manual of the dryer.
When installing a safety valve, always keep the design pressure of the circuit in
mind. See "7.2 Design pressure" [
NOTICE
The design pressure of high pressure side of the connected refrigeration parts MUST
be 9 MPa (90 bar).
NOTICE
If the design pressure of the lower pressure side of refrigeration parts is different
from 90 bar (for example: 60 bar), a safety valve MUST be installed on the field
piping according to this design pressure. It is NOT possible to connect refrigeration
parts with design pressure below 60 bar.
NOTICE
The design pressure of the connected air conditioning parts MUST be 12 MPa
(120 bar). If this is not the case, please contact your dealer for assistance.
CAUTION
When installing a safety valve, ALWAYS add enough support to the valve. An
activated safety valve is under high pressure. If not installed securely, the safety valve
may cause damage to the piping or the unit.
The installer has to install the blow off piping.
▪ Place the end of the blow off piping in a horizontal position (for example, to
prevent rain dripping in). Never point the piping end downwards.
▪ Place the end of the blow off pipe on a location where it cannot hurt or harm
people or items.
▪ Calculate the maximum piping length according to standard EN 13136.
▪ Thread type must be G1 according to standard ISO 228
Keep the following in mind:
▪ Refrigerant R744 is precharged into the unit.
▪ Always keep both liquid and gas stop valves closed during leak test and vacuum
drying of the field piping.
Follow the brazing instructions in the dryer manual.
Remove the dryer cap immediately before brazing (to
prevent absorption of moisture).
If dryer paint burnt during brazing, repair it. For repair
paint details, contact the manufacturer.
If the dryer specifies a flow direction, install accordingly.
4
27].
16 Piping installation
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Installer and user reference guide
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