Toshiba MMW-AP0481CHQ-E, Руководство по установке

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Refrigerant piping
CAUTION
When the refrigerant pipe is long,
provide support brackets at
intervals of 2.5 m to 3 m to clamp
the refrigerant pipe. Otherwise,
abnormal sound may be
generated.
Use the flare nut attached with
the indoor unit or R410A flare nut.
 Permissible piping length and
height difference
They vary depending on the outdoor unit. For details,
refer to the Installation Manual attached to the outdoor
unit, and this manual (Refer to "3. System control of
Hot Water Module").
 Pipe size
 Connecting refrigerant piping
Flaring
1
Cut the pipe with a pipe cutter.
Remove burrs completely. (Remaining burrs may
cause gas leakage.)
2
Insert a flare nut into the pipe, and flare the
pipe.
Use the flare nut provided with the unit or the one
used for the R410A refrigerant. The flaring
dimensions for R410A are different from the ones
used for the conventional R22 refrigerant. A new
flare tool manufactured for use with the R410A
refrigerant is recommended, but the conventional
tool can still be used if the projection margin of the
copper pipe is adjusted to be as shown in the
following table.
Projection margin in flaring: B (Unit: mm)
Flaring diameter size: A (Unit: mm)
* In case of flaring for R410A 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.
• The sealed gas was sealed at the atmospheric
pressure so when the flare nut is removed, there will
no “whooshing” sound: This is normal and is not
indicative of trouble.
• Use two wrenches to connect the indoor unit pipe.
Model MMW-
Pipe size (mm)
Gas side Liquid side
AP048 Ø15.9 Ø9.5
Outer dia. of
copper pipe
R410A tool used
Conventional
tool used
6.4, 9.5
0 to 0.5 1.0 to 1.5
12.7, 15.9
Outer dia. of copper pipe A
+0
–0.4
6.4 9.1
9.5 13.2
12.7 16.6
15.9 19.7
Work using double spanner
• Use the tightening torque levels as listed in the table
below.
• 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.
CAUTION
Tightening with an excessive
torque may crack the nut
depending on installation
conditions.
 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 and the hot water
module until the airtight test and
vacuuming are completed. (If
the indoor unit or the hot water
module is powered on, the
pulse motor valve is fully closed,
which extends the time for
vacuuming.)
• After the vacuuming is
completed, carry out the
following procedure before
adding refrigerant.
Plate heat exchanger may
explode because the water in
the plate heat exchanger
frozen.
To avoid this phenomenon, add
refrigerant before carrying out a
water supply to the water pipe
system of the Hot Water
Module.
 Open the valve fully
Open the valve of the outdoor unit fully.
Outer dia. of connecting
pipe (mm)
Tightening torque (N•m)
6.4 14 to 18 (1.4 to 1.8 kgf•m)
9.5 33 to 42 (3.3 to 4.2 kgf•m)
12.7 50 to 62 (5.0 to 6.2 kgf•m)
15.9 63 to 77 (6.3 to 7.7 kgf•m)
37-EN 38-EN