mundoclima MUC 12 HF Manual De Instalación página 29

Air Conditioner Duct Type
Expel the air
Flaring
Chart 19
1. Cut a pipe with a pipe cutter.
2. Insert a flare nut into a pipe and flare
the pipe.
Outside-diameter
(mm)
Ø6.35
Ø9.53
Ø12.7
Ø16
Ø19
Fasten the nuts
Put the connecting tubing at the proper position,
wrench the nuts with hands, then fasten it with a
wrench.( Refer to Chart 21)
Chart 21
CAUTION
Too large torque will harm the bellmouthing
and too small will cause leakage. Please
determine the torque according to Table 2.
Tubing Size
Ø9.53
Ø19
Chart 20
A(mm)
Max Min
8.7 8.3
12.4 12.0
15.8 15.4
19.0 18.6
23.3 22.9
Torque
15~18 N.m
35~40 N.m
Table2
The necessary filling amount of refrigerant
When the length of the one-way pipe is under 5m,
the quantity of filling fluorine will be subject to the
nameplate.
When the length of the one-way pipe is over 5m,
the quantity to be added is as follows:
≤
Capacity 20000 Btu/h: 0.03x(L-5) (Unit: kg)
≤
Capacity 24000 Btu/h: 0.065x(L-5) (Unit: kg)
L: The length of the pipe
Please record the quantity added and store it
carefully for future maintenance.
Expel the air with a vacuumpump
(Refer to Chart 22)
(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.
8
EN
Chart 22