MUNDO CLIMA MUCS 12 HF Manual De Instalación página 37

Four-Way Cassette Type
Flaring
1. Cut a pipe with a pipe cutter.
2. Insert a flare nut into a pipe and flare
the pipe.
Outside-diameter
(mm)
6.35
9.53
12.7
16
19
Fasten the nuts
Put the connecting tubing at the proper position,
wrench the nuts with hands, then fasten it with a
wrench.( Refer to Chart24)
CAUTION
Too large torque will harm the bellmouthing
and too small will cause leakage. Please
determine the torque according to Table 2.
Tubing Size
f6.35 1420~1720N.cm (144~176kgf.cm)
f9.53 3270~3990N.cm (333~407kgf.cm)
f12.7 4950~6030N.cm (504~616kgf.cm)
f166 6180~7540N.cm (630~770kgf.cm)
f199 9720~11860N.cm (990~1210kgf.cm)
Table2
A(mm)
Max Min
8.3 8.3
12.4 12.0
15.8 15.4
19.0 18.6
23.3 22.9
Torque
(kg)
Expel the air with a vacuumpump
(Refer to Chart 25)
(please refer to its manual for the way of using
manifold value)
• Loosen and remove
the maintenance nuts
of stop values Aand B,
and connect the charge
hose of the manifold
value with the
maintenance terminator
of stop valueA. (Be sure
that stop values A and
B are both closed)
• Connect the joint of the charge hose with the
vacuumpump.
• Open the Lo-lever of the manifold value
completely.
• Turn on the vacuum pump. At the beginning of
pumping, loosen the maintenance terminator nut
of stop valueB a little to check whether the air
comes in (the sound of the pump changes, and
the indicator of compound meter turns below
zero). Then fasten the nut.
• When the pumping has finished, close the Lo-
lever of the manifold value completely and turn off
the vacuum pump.
When you have pumped for over 15 minutes,
please confirm that the indicator of multi-meter is
-5
on 1.0x10 Pa(-76cmHg).
• Loosen and remove the quadrangle cover of stop
values Aand Bto open stop value Aand B
completely, then fasten them.
• Disassemble the charge hose fromthe repair-
mouth of stop value A, and fasten the nut.
CAUTION
All the stop values should be opened before test
operation. Each air conditioner has two stop
values of different sizes on the side of the outdoor
unit which operate as Lo-stop value and Hi-stop
value, respectively. (Refer to Chart 26)
CHECK THE LEAKAGE
Check all the joints with the leak detector or soap
water. (refer to Chart 29)
INSULATION
Be sure to with insulating materials cover all the
exposed parts of the flare pipe joints and
refrigerant pipe on the liquid-side and the gas-side.
Ensure that there is no gap between them.
Incomplete insulation may cause water
condensation.
11
EN