Refrigerant Connections - Carrier 40KQM012 Installationsanweisung

40KQM

Refrigerant connections

IMPORTANT:
During the unit installation make first refrigerant connections
and then electrical connections. If unit is uninstalled first
disconnect electrical cables, then refrigerant connections.
Refer to the outdoor unit installation manual for tube sizing,
and limitations (slope, length, number of curves allowed,
refrigerant charge, etc.).
Gas
Mod. (suction line)
mm (inches)
012 9.52
015 12.7
For refrigerant tubes use seamless, insulated refrigeration grade
tube, (Cu DHP type according to ISO1337), degreased and
deoxidized, suitable for operating pressures of at least 4200 kPa
and for burst pressure of at least 20700 kPa.
Under no circumstances must sanitary type copper pipe be used.
Flaring the end of pipes
Remove the protection caps from the copper pipe ends.
Holding the tube downward, cut the extreme end off, removing any
copper shavings with a deburring blade.
Remove the flare nuts from the "FLARE" connection body of the
indoor unit and insert them into the pipes.
Make the flare to the pipe end with the proper flaring tool.
Flare end must not have any burrs or imperfections.
The length of the flared walls must be uniform.
Lubricate the end of pipe and the thread of the flare connection
with anti-freeze oil.
Tighten by hand and then use two wrenches to tighten all
connections fully, applying the tightening torque shown in the table.
All manuals and user guides at all-guides.com
Tube diameter
Liquid
(discharge line)
mm (inches)
(3/8") 6.35 (1/4")
(1/2") 6.35 (1/4")
Pipe connection to the unit
Use two wrenches to tighten all connections.
Insufficient tightening torque could cause a refrigerant leak from
the connection.
Excessive tightening torque will damage the pipe flare.
Tube diameter
mm (inches)
6.35 (1/4")
9.52 (3/8")
12.70 (1/2")
Pipe
Pipe insulation
Adhesive tape
Once all connections have been completed, check for leaks using
soapy water.
Finally, wrap connections with anti-condensate insulation and
tighten with tape, without exerting excessive pressure on the
insulation. Repair and cover any possible cracks in the insulation.
Checking
Pour several litres of water into the condensate drain pan and check
that it flows freely to the drain.
Check pipe gradient and look for possible obstructions.
E N G L I S H
Torque
Nm
14÷18
33÷42
50÷62
GB - 9