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122
ProKiln GAC400 PROBE GAS SAMPLING SYSTEM | OI/GAC400-EN REV. A
... 11 Maintenance
... Maintenance work
Cooling module: Checking cooling water
Safety measures
WARNING
Dangers when performing maintenance work.
Always take the following safety measures when performing
this work:
•
Wear a face mask against heat, heat-proof gloves, and
protective welder's clothing.
•
Operation/Service Mode -50S15 switch must be in the
Service Mode (with a padlock).
•
Additionally press the EMERGENCY STOP switch.
•
Do not enter the danger area around the retractor until it
is at standstill and the warning lamps and buzzer are off
and the shutter is closed.
•
Do not perform the work until the probe gas sampling
system has cooled down.
•
Lock the shutter before starting the work, unlock the
shutter only after finishing the work.
•
Always keep the floor around the probe gas sampling
system clean and dry.
Explanation of safety measures: Safety instructions for
maintenance work on page 98.
Cooling module: Checking cooling water
Maintenance interval
•
Check cooling water flow rate on a weekly basis.
•
Check the Glycol concentration in the water tank if a cold
season is upcoming.
•
Check the Glycol concentration during a cold season on a
monthly basis
•
Check for lime deposits in tubes, tank, and cooler
Cooling-water requirements
The closed open-water circuit is automatically re-filled by a
solenoid valve located at the inlet of the water tank. The water
tank and tube system must be filled with potable water quality
(do not use anti-corrosive). In ambient temperatures below +5°C,
add approximately 30% of anti-freeze.
Anti-freeze requirements
If ambient temperatures below 5 °C can be expected, you must
add anti-freeze. ABB recommends Glycol as anti-freeze. Anti-
freeze with anti-corrosive additive is not permitted.
As an option, the system can include a heater in the water tank
to prevent freezing. If a water heater is added glycol will not be
required.
Instructions
1. During operation, observe cooling waterflow rate and
temperature on the controller, at the Trends submenu for
cooling.
2. Check that water level in tank corresponds with HMI water
tank level indication
3. Regularly remove any lime or solid deposits at the bottom of
the tank by releasing tank bottom valve for a short period to
rinse it out.
4. In seasons with cold weather check, the Glycol concentration
to be at approximately 30%
5. If water flow is low (see Parameter input Alarm setpoint
menu on page 33), immediately remove probe from kiln and
proceed to next steps.
6. Operation/Service Mode -50S15 switch must be in the
Service Mode
7. Switch system to manual mode on the HMI (if this has not
already been done).
Path: Home ► Manual
8. Retract gas sampling probe out of the kiln.
Path: Menu ► Probe Position ► GO S0
WARNING! The probe moves out of the kiln. Do not stand in
the area of travel of the probe or probe buggy until the probe
has reached its end position.
9. When working on the retractor and gas sampling probe,
additionally actuate the EMERGENCY-STOP -15S7 or -150S3
switch for reasons of safety and turn the Safety switch -
101S2 at the probe rear cabinet to OFF position, to prevent
any movement of the probe. This switch can also be secured
with a padlock. Additionally, secure that the flange shutter
remains closed.
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