Specifications

EDUS39-600-F20_b
27 FXOQ-M
Installation
NOTE
• Make absolutely sure to execute heat insulation works on the pipe-connecting section after checking gas leakage by thoroughly
studying the following Figures 12 and 13.
• Wrap the insulation for fitting (3)(4) around the insulation for the joints on the liquid piping side and the gas piping side. Refer
to Figures 12 and 13.
• When installing the unit on the ceiling, make sure that the seam between the insulation for fitting (3)(4) faces up. Fasten both
ends with the clamps (2). Figures 12 and 13 show how to install on the wall.
CAUTION
• Wrap the included sealing pad (5) around the insulation for fitting (3) and (4) referring to Figure 14.
• Be sure to insulate any field piping all the way to the piping connection inside the unit. Any exposed piping may cause conden-
sation or burns if touched.
• Do not use flue when brazing refrigerant piping. Use the phosphor copper brazing filler metal (BCUP-2:JIS 3264/B-Cu93P-710/
795:IS0 3677) which does not require flux. Flux has an extremely negative effect on refrigerant piping systems. For example,
if chlorine based flux is used, it will cause pipe corrosion. Flux containing fluorine damages refrigerant oil.
NOTE
• Before brazing local refrigerant piping,
nitrogen gas shall be blown through
the piping to expel air from piping. If
your brazing is conducted without
nitrogen gas-blowing, a large amount
of oxide film develops inside the pip-
ing, and could cause system malfunc-
tion.
• When brazing the refrigerant piping,
only begin brazing after having carried
out nitrogen substitution or while
inserting nitrogen into the refrigerant
piping. Once this is done, connect the
indoor unit with a flared connection.
• Nitrogen should be set to 2.90 PSI
with a pressure-reducing valve if braz-
ing while inserting nitrogen into the
piping.
Piping Connections (gas side)
between BEQ36-48 type and the Verti-
cal Handling Unit:
1. Remove the flare nut (gas side 34”)
after setting the Electronic Expan-
sion Valve unit.
2. Put the flare nut through the Con-
nection Pipe (7) and process flare.
3. Braze the connection pipe as shown
in diagram, and connect BEQ36-48
type and the Vertical Handling unit.
4. Set the insulation for fitting (6)
attached on the Connection Pipe
(7). Close the gap between the pipe
insulations by taping tightly after
setting.
CAUTION
• Piping is very hot after brazing so use
caution to avoid burns.
• Do not directly touch any refrigerant
leakage from piping connections as it
can cause frostbite.