EDUS39-800-F9
Installation and Operation
FXZQ-M
27
When brazing the refrigerant piping, only begin brazing
after having carried out nitrogen substitution (refer to the
manual for multi installation for buildings for directions on
how to carry out nitrogen substitution) or while inserting
nitrogen into the refrigerant piping (refer to the figure
below). Once this is done, connect the indoor unit with a
flared or a flanged connection.
1
Refrigerant piping
2
Part to be brazed
3
Nitrogen
4
Taping
5
Hands valve
6
Pressure reducing valve
The nitrogen must be set to 2.9 psi when brazing while
inserting nitrogen into the piping
After checking for gas leaks, be sure to insulate the pipe
connections using supplementary piping insulation and
insulating tape as shown in the figure below.
The insulating tape must be wrapped starting from the L-
shaped bend in the piping all the way to the end of the pipe
inside the unit.
1
Local piping
2
Insulation tape
3
Indoor unit piping
4
Indoor unit piping insulation
5
Clamp (field supply)
6
Insulating tape
7
Starting point for taping the insulation
8
Attach the insulation tape so that there are no gaps in
the insulation seam
CAUTION
Be sure to insulate all field piping all the way to the piping
inside the unit. Exposed piping may produce condensation or
cause burns if touched.
NOTE
Not recommended but in case of emergency.
You must use a torque wrench but if you are obliged to install
the unit without a torque wrench, you may follow the installa-
tion method mentioned below.
After the work is finished, make sure to check that there is
no gas leak.
When you keep on tightening the flare nut with a spanner,
there is a point where the tightening torque suddenly
increases. From that position, further tighten the flare nut
within the angle shown below:
When connecting the flare nut, coat the flare both inside
and outside with refrigerating ether or ester oil and initially
tighten by hand 3 or 4 turns before tightening firmly.
Coat here with ether oil or ester oil
Check the pipe connector for gas leaks, then insulate it as
shown in figure 12.
1
Liquid pipe
2
Gas pipe
3
Insulation for fitting of liquid line (supplied with the unit)
4
Insulation for fitting of gas line (supplied with the unit)
5
Clamps (use 2 clamps per insulation)
6
Small sealing pad (supplied with the unit)
Wrap the sealing pad only around the insulation for the
joints on the gas piping side.
CAUTION
Be sure to insulate any field piping all the way to the piping
connection inside the unit. Any exposed piping may cause
condensation or burns if touched.
DANGER
If refrigerant gas leaks during the work, ventilate the area.
A toxic gas is emitted by the refrigerant gas being exposed
to a fire and could result in severe injury or death.
Finally make sure there is no refrigerant gas leak. A toxic
gas may be released by the refrigerant gas leaking indoor
and being exposed to flames from an area heater, cooking
stove, etc. and could result in severe injury or death.
1
2
4
5
6
3
3
2.9 psi
1
2
3
4
4
2
8
5
4
2
6
7
1
Pipe size
(in)
Further
tightening angle
Recommended arm
length of tool (in)
Ø1/4
60~90°
±5 7/8
Ø3/8
60~90°
±7 7/8
Ø1/2
30~60°
±9 13/16
Ø5/8
30~60°
±11 13/16
Содержание FXZQ-M Series
Страница 1: ...EDUS 39 800 F9_a AMERICAS FXZQ M 4 Way Ceiling Mounted Cassette Unit 2 2 ...
Страница 3: ...External Appearance EDUS39 800 F9_a 2 FXZQ M 1 External Appearance FXZQ07 18M ...
Страница 7: ...Dimensions EDUS39 800 F9_a 6 FXZQ M 3TW30724 3 FXZQ07 18M7VJU BYFQ60B8W1 BYFQ60B8W1U ...
Страница 14: ...EDUS39 800 F9_a Air Velocity and Temperature Distributions Reference Data FXZQ M 13 FXZQ07 09M Heating mode ...
Страница 15: ...Air Velocity and Temperature Distributions Reference Data EDUS39 800 F9_a 14 FXZQ M FXZQ12M Cooling mode ...
Страница 16: ...EDUS39 800 F9_a Air Velocity and Temperature Distributions Reference Data FXZQ M 15 FXZQ12M Heating mode ...
Страница 17: ...Air Velocity and Temperature Distributions Reference Data EDUS39 800 F9_a 16 FXZQ M FXZQ18M Cooling mode ...
Страница 18: ...EDUS39 800 F9_a Air Velocity and Temperature Distributions Reference Data FXZQ M 17 FXZQ18M Heating mode ...
Страница 20: ...EDUS39 800 F9_a Installation and Operation FXZQ M 19 10 Installation and Operation 10 1 Center of Gravity ...
Страница 39: ...Accessories EDUS39 800 F9_a 38 FXZQ M ...