Carrier 40KMQ Especificaciones descargar pdf (Pagina 10)

Step 4 — Complete Refrigerant Piping

Connections

Use field-supplied refrigerant grade piping designed for use

with R-410A refrigerant.

FLARING THE ENDS OF PIPES — Remove the protec-

tive caps from the copper pipe ends. Holding the tube down-

ward, 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. The flare end must not have any burrs or imperfec-

tions. The length of the flared walls must be uniform. See

Fig. 18 and 19.

Lubricate the end of pipe and the thread of the flare connec-

tion with anti-freeze oil. Tighten by hand and then use two

wrenches to tighten all connections fully, applying the tighten-

ing torque shown in Table 5. Refer to Fig. 20.

Table 5 — Tightening Torque

PIPING CONNECTION TO THE UNIT — Use two wrench-

es to tighten all connections.

Once all connections have been completed, check for leaks

using soapy water. If no leaks were found, 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.

If either refrigerant tubing or indoor coil is exposed to

the atmosphere, the system must be evacuated following good

refrigeration practices.

IMPORTANT: During unit installation make the refrigerant

connections first and then the electrical connections. If the

unit is uninstalled, disconnect the electrical cables first and

then the refrigerant connections. Refer to the outdoor unit

installation instructions for tube sizing and limitations.

TUBE

DIAMETER

(in.)

TORQUE

(ft-lb)

in. 31

in. 48

in. 74

Insufficient tightening torque could cause a refrigerant leak

from the connection. Excessive tightening torque will dam-

age the pipe flare.

DO NOT BURY MORE THAN 36 IN. OF REFRIGER-

ANT PIPE IN THE GROUND. If any section of pipe is

buried, there must be a 6-in. vertical rise to the valve

connections on the outdoor unit. If more than the

recommended length is buried, refrigerant may migrate to

cooler, buried section during extended periods of system

shutdown. This causes refrigerant slugging and could

possibly damage the compressor at start-up.

Adjustable wrench or torque wrench

Outdoor end

Indoor end

Fig. 18 — Removing Burrs

Fig. 19 — Flared Walls are Equal

Fig. 20 — Tightening Connections

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 23 24

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