Daikin BSF4Q54TVJ Manual Del Usario página 16

NOTES
• If the number of indoor units to be connected is less than the number of branch ports (so that there are
empty branch ports left, or if you plan to increase the number in the future), any of the branch ports
can be left unused. Ensure to follow appropriate procedure for closing the unused ports.
• If you plan to add new indoor units in the future, select a pipe size based on the total indoor unit capac-
ity before addition of new units. Do not select a pipe size based on the total future capacity. It will result
in abnormal operation. If piping size doesn't change before and after extension, extension will be
allowed.
• For more information about extension, contact your Daikin sales representative.
5-2 Pipe connection work precautions
Connect the pipes .
• Braze (*2) refrigerant pipes after nitrogen replacement (replacing air with nitrogen while allowing nitro-
gen to flow inside the refrigerant pipe (*1)). (Refer to Fig . 4 .)
(*1) The pressure regulator for the nitrogen released when doing the brazing should be set to about 2.9
psi (0.02 MPa) (enough to feel a slight breeze on your cheek).
(*2) Do not use flux when brazing the refrigerant pipe.
Use phosphor copper (B-Cu93P-710/795: ISO 3677), which does not require flux, as the filler
metal for brazing.
(Using chlorine flux may cause the pipes to corrode, and if it contains fluoride it may cause the
refrigerant lubricant to degrade, adversely affecting the refrigerant piping system.)
CAUTION
• Do not use an anti-oxidizing agent when brazing the piping.
(Residual debris could clog the piping or cause parts to malfunction.)
• For more information about outdoor unit refrigerant pipes, see the installation manual included with the
outdoor unit or the Engineering Data Book.
(Failure to purge air from the pipes or fill additional refrigerant may result in an insufficient volume of
refrigerant in the pipes or other problems, causing the equipment to malfunction [for example, to not
cool or heat properly].)
13
Location of brazing
Nitrogen
Refrigerant pipe
Fig . 4
Pressure regulator
Taping
Valve
English