External Factors; Checking Procedures - Daikin Sky Air Advance RZA200D7Y1B Service Manual

Refrigerant piping repair

4.3 External factors

4.3.1 Checking procedures

To check the outdoor temperature
To check the required space around the outdoor unit heat exchanger
RZA200+250D7Y1B
Sky Air Advance-series
ESIE19-13A – 2020.05
5 Check the manifold if vacuum is reached. Close the gas stop valve and stop
forced cooling operation.
▪ Make sure to cover open pipe ends during repair so no dust or moisture can
enter.
▪ Make sure to re‑apply insulation removed during repair.
▪ Pipe expansion / flare making:
- Remove any burrs on the cut surface using the correct tool such as reamer or
scraper (note that excessive deburring can thin the pipe walls and cause
cracking of the pipe).
- Make sure the flare has the correct size (use a flare gauge).
- Make sure no particles remain in the piping.
- Apply just a drop of refrigerant oil on the inner surface of the flare.
- Make sure the flare connection is tightened with the correct torque (torque
values refer to installation manual).
▪ Brazing:
- Use the correct brazing tool.
- Use a phosphor copper filler metal (silver composition of 0 to 2%). Do not use
flux material.
- Flush the piping before brazing with nitrogen to avoid oxidation of the inside of
the copper tubes (nitrogen purity ≥99.99%).
1 The temperature ranges for the different operation modes of the unit can be
found in the databook on Business Portal.
INFORMATION
If the outdoor temperature is outside the range of operation, the unit may NOT
operate or may NOT deliver the required capacity.
Is the outdoor temperature within the
operating range?
Yes
No
1 Check if the space around the outdoor unit heat exchanger is sufficient. See
the installation manual for the required space specifications. Adjust as
needed.
4 Third party components
|
Action
Return to the troubleshooting of the
specific error and continue with the
next procedure.
Wait for the outdoor temperature to
return within the operating range.
Service manual
147