English
7
5. BEV UNIT INSTALLATION
6. REFRIGERANT PIPING WORK
〈〈〈〈
This shows the piping method between the outdoor unit and the BEV unit and the indoor unit. Select
the pipe size and refrigerant branch kit depending on how the piping will be laid.
〉〉〉〉
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For refrigerant piping of outdoor units, see the installation manual attached to the outdoor unit.
〉〉〉〉
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Execute heat insulation work completely on both sides of the gas piping and the liquid piping. Oth-
erwise, a water leakage can result sometimes.
〉〉〉〉
〈〈〈〈
When using a heat pump, the temperature of the gas piping can reach up to approximately 120
°
C,
so
use
insulation which is sufficiently resistant
.
〉〉〉〉
〈〈〈〈
Improve the insulation on the refrigerant piping depending on the installation environment.
If the insulation is not sufficient, condensation may form on the surface of the insulation.
〉〉〉〉
〈〈〈〈
Before refrigerant piping work, check which type of refrigerant is used. Proper operation is not pos-
sible if the types of refrigerant are not the same.
〉〉〉〉
CAUTION
• Use a pipe cutter and flare suitable for the type of refrigerant.
• Apply ester oil or ether oil around the flare section before connecting.
• To prevent dust, moisuture or other foreign matter from infiltrating the tube, either pinch the end or
cover it with tape.
• Do not allow anything other than the designated refrigerant to get mixed into the refrigerant circuit,
such as air, etc. If any refrigerant gas leaks while working on the unit, ventilate the room thoroughly
right away.
•
The outdoor unit is charged with refrigerant.
•
For the refrigerant piping and branching, follow the
“piping connection procedure”
.
•
Be sure to use both a spanner and torque wrench together, as shown in the drawing, when connecting or
disconnecting piping to/from the unit.
•
Refer to the Table 1 for the dimensions of flare nut spaces.
Nut (field supplied)
Washer
(field supplied)
10-15mm
Hanging fitting
BEV main unit
Hanging bolt
(field supplied)
Fig. 6
When hanging the unit from the ceiling
(1) Temporarily install the BEV unit.
(2) Adjust the height of the main unit with the nut.
(3) Check that the main unit is installed on the level.
(4) Tighten the nut on both the top and the bottom
to fix securely.
●
Use only accessories and parts which are of the designated specification when installing.
●
Mount the hanging fittings to
hanging bolts. Secure the hanging fittings on
the top and the bottom with nuts (M8, field
supplied) and washers (M8: Outside diameter
size 24 to 28 mm) (field supplied).
Mounting screws
(field supplied)
Hanging fitting
BEV unit
When installing the unit on a wall
(1) Mount the hanging fittings with the
mounting screws (4 pieces).
(2) Use M4 screws.
Fig. 7
3P084604-2A_Eng.fm Page 7 Wednesday, March 3, 2004 10:01 AM
