ABB DressPack IRB 6640 Product Manual page 314

4 Repair
4.4.1 Replacement of Air supply circuit
Continued
H
Required equipment
Equipment
Water and air unit
Standard toolkit,
DressPack/SpotPack
Circuit diagram
General precautions
Removal
The procedure below details how to remove the Air supply circuit. It does not deal
with details specific to each version, such as article numbers, connector types etc.
For details see the Spare parts section.
1
2
3
4
5
Continues on next page
314
Electrical Proportional Valve (EP)
Note
If the water and air unit is equipped with an Electrical proportional valve, the
valve retains the set pressure on the output side (temporarily), when power or
incoming air is shut off.
Action
CAUTION
The system contains compressed air! Observe the
safety information in section
pneumatic/hydraulic systems on page
Turn off the hand operated air valve on the air sup-
ply circuit.
With the option Electrical proportional valve:
In addition to turning off the hand operated valve
on the air supply circuit (see above), the output
pressure of the Electrical Proportional valve must
be reduced separately either by changing the refer-
ence signal to zero first and/or exhausting it with a
separate valve. It is also possible to exhaust air
pressure by activating attached units to consume
any residual pressure.
Turn off the shop floor air supply to the Water and
Air unit.
Remove the hose of the compressed air supply of
the workshop.
© Copyright 2007-2018 ABB. All rights reserved.
Art. no. Note
See Spare parts. A number of versions are available.
The Water and Air unit assembly con-
tains all required hardware for fitting and
connecting.
3HAC17290-7 The contents are defined in section
Toolkits, DressPack/SpotPack on
page
3HAC026208-001 SpotPack
Safety risks related to
32.
Product manual - DressPack/SpotPack IRB 6640
335.
Note
The air hoses on the robot will be
decompressed.
Note
Reducing the pressure of the
Electrical Proportional valve by
changing the reference signal to
zero, must be done before the air
supply is turned off since the
power supply to the Electrical
proportional valve is turned off
automatically at insufficient air
pressure.
3HAC028638-001 Revision: K