mundoclima MUCS 12 HF, Instalation Manual

Page: 36 / 49

Four-Way Cassette Type
EN
7. INSTALL THE CONNECTING PIPE
8. CONNECT THE DRAIN PIPE
CAUTION
CAUTION
CAUTION
Check whether the height drop between the indoor
unit and outdoor unit, the length of refrigerant pipe,
and the number of the bends meet the following
requirements:
The max height drop........................................20m
The length of refrigerant pipe............less than 30m
The number of bends...........................less than 15
Do not let air, dust, or other impurities fall in the
pipe systemduring the time of installation.
The connecting pipe should not be installed until
the indoor and outdoor units have been fixed
already.
Keep the connecting pipe dry, and do not let
moisture in during installation.
1. Measure the necessary length of the connecting
pipe, and make it by the following way.
(Refer to "Connect The Pipes" for details)
1) Connect the indoor unit at first, then the outdoor
unit. Bend the tubing in proper way. Do not harm to
them.
(If the height drop is more than 10m, you had better put the
outdoor unit over above the indoor unit)
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Daub the surfaces of the flare pipe and the joint
nuts with frozen oil, and wrench it for 3~4 rounds
Be sure to use two wrenches simultaneously
when you connect or disconnect the pipes.
with hands before fasten the flare nuts.
(Refer to chart 19)
2) The stop value of the outdoor unit should be
closed absolutely (as original state). Every time
you connect it, first loosen the nuts at the part of
stop value , then connect the flare pipe
immediately (in 5 minutes). If the nuts have been
loosened for a long time, dusts and other
impurities may enter the pipe systemand may
cause malfunction later. So please expel the air
out of the pipe with refrigerant (R407C) before
connection.
3) Expel the air (refer to the "Expel The Air") after
connecting the refrigerant pipe with the indoor unit.
Then fasten the nuts at the repair-points.
better it is.
Be sure to use the same insulating materials when
you buy the brass pipe (more than 9mmthick).
Drill a hole in the wall (suitable just for the size of
the wall conduit, 53, 71 series diameter is 90mm,
and 120,105,140 series diameter is 105 in
general), then set on the fittings such as the wall
conduit and its cover.
Bind the connecting pipe and the cables together
tightly with binding tapes. Do not let air in, which
will cause water leakage by condensation.
Pass the bound connecting pipe through the wall
conduit fromoutside. Be careful of the pipe
allocation to do no damage to the tubing.
Connect the pipes.
Then, open the stem of stop values of the
outdoor unit tomake the refrigerant pipe
connecting the indoor unit with the outdoor unit in
fluent flow.
Be sure of no leakage by checking it with leak
detector or soap water.
Cover the joint of the connecting pipe to the
indoor unit with the soundproof / insulating
sheath (fittings), and bind it well with the tapes to
prevent leakage.
NOTICE FOR BENDABLE PIPE
BEND THE CONNETCTING PIPE OF SMALL
WALL THICKNESS (Ø9,53 mm)
Use the market brass pipe
2.
3.
4.
5.
The bending angle should not exceed 90 .
Bending position is preferably in the middle of the
bendable pipe. The larger the bending radius the
Do not bend the pipe more than three times.
Cut out a desired concave at the bending part of
the insulating pipe.
Then expose the pipe (cover it with tapes after
bending).
To prevent collapsing or deforming, please bend
the pipe at its biggest radius.
Use bender to get a small radius pipes.
1. Locate The Pipes
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