Chigo CS-25V3A-MA114A, Руководство по обслуживанию

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13
Leakage
Detection
Use a sponge soaked with soap water or a leakage detector to check the
connectors and access-valves on indoor and outdoor units. Keep testing for no
less than 3 minutes at each position. When the leakage detection is completed,
do wash away the residual soap water. (Notes: In summer, leakage detection
should be done under stop state. In winter, it should be done under heating
mode).
）
Position Most Likely to Leak
Besides four connectors connecting outdoor pipes, nuts at high-pressure /
low-pressure valve core and filling portal are most likely to leak but often
neglected. Therefore, when installing the machine, make sure to fully open the
valve core to dead position and tighten every nut and check for leakage.
The connector with leakage problem should be reinstalled.
Pipe Wrapping
and Wall Hole
Blocking
Sort the pipeline in good order.
Use pipe bender when bend the pipe with 90°. To avoid flattening or cracking
the pipe without pipe bender, do bend it with a radius as large as possible.
Table: Standard of piping torque:
1. Nut torque of connecting pipe (R410a
、
R407c)
Outer diameter of copper pipe Torque
mm inch Kg.f/m
φ6.00
1/4 1.8
φ9.52
3/8 4.2
φ12.0
1/2 5.5
φ15.88
5/8 6.6
φ19.05
3/4 6.6
2. Nut torque of connecting pipe (R22)
Outer diameter of steel pipe Fastening torque Reinforced
fastening torque
mm inch Kgf/m Kgf/inch Kgf/m Kgf/inch
∮
6.00
1/4″
1.6 6.3 2.0 7.9
∮
9.52
3/8″
3.0 11.8 3.5 13.8
∮
12.0
1/2″
5.0 19.7 5.5 21.6
∮
15.88
5/8″
7.5 29.5 8.0 31.5
∮
19.05
3/4″
12.0 47.2 14 55.1
Nut for high/low pressure
valve element
Nut for
access door