Installation and operation manual
3
EKEX EKEXDCBAV3
Option kit for combination of Daikin condensing units
with field supplied evaporators
4PW30903-1
■
Keep the space in front of the boxes free for future maintenance.
■
Keep evaporator (air handling unit), power supply wiring and
transmission wiring at least 1 m away from televisions and
radios. This is to prevent image interference and noise in those
electrical appliances. (Noise may be generated depending on
the conditions under which the electric wave is generated, even
if 1 m is kept.)
Precautions
Do not install or operate the unit in rooms mentioned below.
■
Where mineral oil, like cutting oil is present.
■
Where the air contains high levels of salt such as air near the
ocean.
■
Where sulphurous gas is present such as that in areas of hot
spring.
■
In vehicles or vessels.
■
Where voltage fluctuates a lot such as that in factories.
■
Where high concentration of vapor or spray are present.
■
Where machines generating electromagnetic waves are
present.
■
Where acidic or alkaline vapor is present.
■
The option boxes must be installed with entrances downward.
V
ALVE
KIT
INSTALLATION
Mechanical installation
1
Remove the valve kit box cover by unscrewing 4x M5.
2
Drill 4 holes on correct position (measurements as indicated in
figure below) and fix the valve kit box securely with 4 screws
through the provided holes Ø9 mm.
Brazing work
3
Prepare the inlet/outlet field piping just in front of the connection
(do
not
braze yet).
4
Remove the pipe fixing clamp (C) by unscrewing 2x M5.
5
Remove the upper and lower pipe insulations.
6
Braze the field piping.
7
After brazing, put the lower pipe insulation back in place and
close it with the upper insulation cover (after pealing off the
liner).
8
Secure the pipe fixing clamp (C) in place again (2x M5).
9
Make sure that field pipes are fully insulated.
Field pipe insulation must reach up to the insulation you have
put back in place as per procedure step 7. Make sure that there
is no gap between both ends in order to avoid condensation
dripping (finish the connection with tape eventually).
Cautions for brazing
■
Be sure to carry out a nitrogen blow when brazing.
Brazing without carrying out nitrogen replacement or releasing
nitrogen into the piping will create large quantities of oxidized
film on the inside of the pipes, adversely affecting valves and
compressors in the refrigerating system and preventing normal
operation.
■
When brazing while inserting nitrogen into the piping, nitrogen
must be set to 0.02 MPa with a pressure-reducing valve (=just
enough so that it can be felt on the skin).
■
For details, see manual of the outdoor unit.
A
Inlet coming from the outdoor unit
B
Outlet to evaporator
C
Pipe fixing clamp
192.5 mm
340
mm
C
B
A
■
Make sure to cool the filters and valve body with
a wet cloth and make sure the body temperature
does not exceed 120°C during brazing.
■
Make sure that the other parts such as electrical
box, tie wraps and wires are protected from direct
brazing flames during brazing.
1
Refrigerant piping
2
Part to be brazed
3
Taping
4
Hands valve
5
Pressure-reducing valve
6
Nitrogen
1
2
3
4
5
6
6
