Toshiba MMK-AP0074MH-E, Руководство по установке

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SMMS High-Wall Type
Installation Manual
– 20 –
EN
Tightening connection
CAUTION
• Do not apply excessive torque. Otherwise, the
nut may crack depending on the conditions.
(Unit: N•m)
Outer dia. of copper pipe Tightening torque
6.4 mm 14 to 18 (1.4 to 1.8 kgf•m)
9.5 mm 33 to 42 (3.3 to 4.2 kgf•m)
12.7 mm 50 to 62 (5.0 to 6.2 kgf•m)
15.9 mm 63 to 77 (6.3 to 7.7 kgf•m)
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Tightening torque of flare pipe connections
Pressure of R410A is higher than that of R22.
(Approx. 1.6 times) Therefore, using a torque
wrench, tighten the flare pipe connecting sections
which connect the indoor and outdoor units of the
specified tightening torque.
Incorrect connections may cause not only a gas
leak, but also a trouble of the refrigeration cycle.
Align the centres of the connecting pipes and
tighten the flare nut as far as possible with your
fingers. Then tighten the nut with a spanner and
torque wrench as shown in the figure.
Work using double spanner
CAUTION
Tightening with an excessive torque may crack
the nut depending on installation conditions.
Tighten the nut within the specified tightening
torque.
Airtight test / air purge, etc.
For air tightness test, adding refrigerant, refer to the
Installation Manual attached to the outdoor unit.
CAUTION
Do not supply power to the indoor unit until the
airtight test and vacuuming are completed. (If the
indoor unit is powered on, the pulse motor valve is
fully closed, which extends the time for
vacuuming.)
Open the valve fully
Open the valve of the outdoor unit fully.
Heat insulation
Heat insulation for the pipes should be done
separately for the liquid side and gas side. Because
both of the liquid and gas side pipes become a low
temperature during cooling operation, sufficient
heat insulation should be done to prevent
condensation.
• Heat insulator with a heat resistance of 120 °C or
more must be used for the gas side pipe.
• The pipe connection section of the indoor unit
must be heat insulated securely and compactly
with the attached heat insulator.
Fix with vinyl tape
Heat insulator
(attached) Local side pipe
20-EN