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5. BEV UNIT INSTALLATION
• Use only accessories and parts which are of the designated specification when installing.
〈〈When hanging the unit from the ceiling〉〉
(1) Temporarily install the BEV unit.
• 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).
(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.
〈〈When installing the unit on a wall〉〉
(1) Mount the hanging fittings with the mounting screws (4 pieces).
(2) Use M4 screws.
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.〉
〈For refrigerant piping of outdoor units, see the installation manual attached to the outdoor unit.〉
〈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
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 cir-
cuit, such as air, etc. If any refrigerant gas leaks while working on the unit, ventilate the room thor-
oughly 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.
• When connecting the flare nut, coat the flare both inside and outside with ester oil or ether oil and initially
tighten by hand 3 or 4 turns before tightening firmly.
• Refer to the Table 1 to determine the proper tightening torque.
English
Washer
(field supplied)
Hanging bolt
(field supplied)
〉
.
Nut (field supplied)
BEV main unit
Hanging fitting
Mounting screws
(field supplied)
Hanging fitting
BEV unit
Fig. 6
Fig. 7
°
so
C,
7
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