Heat Insulation - Toshiba RAV-GM1101KRTP-E Installationshandbuch

• Do not scratch the inner surface of the flared
part when removing burrs.
• Flare processing under the condition of
scratches on the inner surface of flare
processing part will cause refrigerant gas
leak.
• Check that the flared part is not scratched,
deformed, stepped, or flattened, and
that there are no chips adhered or other
problems, after flare processing.
• Do not apply refrigerating machine oil to the
flare surface.
* In case of flaring with the
conventional flare tool, pull it out
approx. 0.5 mm more than that
for R22 to adjust to the specified
flare size. The copper pipe gauge
is useful for adjusting projection
margin size.
Tightening connection
• Do not apply excessive torque. Otherwise, the
nut may crack depending on the conditions.
Outer dia. of copper pipe
6.4 mm (dia.)
9.5 mm (dia.)
12.7 mm (dia.)
15.9 mm (dia.)
q Tightening torque of flare pipe connections
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
23-EN
CAUTION
CAUTION
(Unit: N•m)
Tightening torque
14 to 18 (1.4 to 1.8 kgf•m)
33 to 42 (3.3 to 4.2 kgf•m)
50 to 62 (5.0 to 6.2 kgf•m)
68 to 82 (6.8 to 8.2 kgf•m)
REQUIREMENT
Tightening with an excessive torque may crack
the nut depending on installation conditions.
Tighten the nut within the specified tightening
torque.
Piping with outdoor unit
• Shape of valve differs according to the outdoor
unit.
For details of installation, refer to the Installation
Manual of the outdoor unit.

Heat insulation

Heat insulation for the pipes should be done
A
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.
Heat insulator
(attached)
REQUIREMENT
Apply the heat insulation to the pipe connecting
section of the indoor unit securely up to the root
without exposure of the pipe. (the pipe exposed
to the outside causes water leak.)
Airtight test/Air purge, etc.
For airtight test,air purge, addition of refrigerant,
and gas leak check, follow the Installation Manual
attached to the outdoor unit.
‒ 23 ‒
Installation Manual
Fix with vinyl tape
Local side pipe