Allied Air 4SCU14LE SERIES Manual de instruções de instalação e manutenção - Página 7

Procurar online ou descarregar pdf Manual de instruções de instalação e manutenção para Ar condicionado Allied Air 4SCU14LE SERIES. Allied Air 4SCU14LE SERIES 20 páginas.

Imprimir página
Flushing Existing Line Set and Indoor Coil
This procedure should not be performed on systems
which contain contaminants, such as compressor
burn out.
When flushing existing line set and/or indoor coil, be sure
to empty all existing traps. Residual mineral oil can act as
an insulator, preventing proper heat transfer. It can also clog
the thermal expansion valve, reducing system performance
and capacity. Failure to properly flush system as explained
in these instructions will void warranty.
Required Equipment
The following equipment is needed to flush the existing line
set and indoor coil (see Figure 8): Two clean R22 recovery
bottles, an oil-less recovery machine with a "pump down"
feature, and two sets of gauges (one for use with R22 and
one for use with R410A).
506251-01
CAUTION
Flushing Procedure
IMPORTANT: The line set and/or indoor coil must be flushed
with at least the same amount of refrigerant that previously
charged the system. Check the charge in the flushing cylinder
before flushing the unit.
1. Remove existing R22 refrigerant using the appropriate
procedure.
If the existing outdoor unit is not equipped with shutoff
valves, or if the unit is not operational AND the existing
R22 refrigerant will be used to flush the system:
Disconnect all power to the existing outdoor unit. Connect
the existing unit, a clean recovery cylinder, and the recovery
machine according to the instructions provided with the
recovery machine. Remove all R22 refrigerant from the
existing system. Refer to the gauges after shutdown to
confirm that the entire system is completely void of
refrigerant. Disconnect the liquid and suction lines from
the existing outdoor unit.
If the existing outdoor unit is equipped with manual
shutoff valves AND new R22 refrigerant will be used to
flush the system:
Start the existing R22 refrigerant system in cooling mode
and close the liquid line valve. Pump all the existing R22
refrigerant back into the outdoor unit.
(It may be necessary to bypass the low pressure switches
to ensure complete refrigerant evacuation.)
Flushing Connections
Note:
Figure 8
Issue 1015
The inverted R22 cylinder must contain at least the
same amount of refrigerant as was recovered from
the existing system.
Page 7 of 20