VIAVAC CB4 - B 4 Storage

MANUAL VIAVAC-CB4 / 4.1 ( Operator section ) Art. nr. 50504 EN (01-07-2017)
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VIAVAC vacuum lifting BV T. + 31 348 449 660 E. info@viavac.com I. www.viavac.com
Adjustments needed when working at altitudes above 1200mtr from seal level.
The reduced atmospheric pressure at high altitudes affects the vacuum switch which controls
switching on and off of the vacuum pump and the alarm.
Depending on the altitude the settings of the switch needs needs to be adapted.
Procedure and required settings can be obtained from VIAVAC when needed.
The vacuum pump can run approx. 120 minutes constantly with a fully charged battery.
To ensure that it is possible to work a whole day with a battery load, the user must also keep an eye
on the vacuum condition of the system during the operation:
This is done by checking that the vacuum pump stops 10 seconds after a vacuum level of 0.65 bar has
been reached. Then it must take at least 30 seconds before it starts pumping again.
If the pump starts up more frequently, this indicates a leak and this causes the battery to discharge
faster than expected and one cannot operate for a whole day.
Therefore it is advisable to first rectify this, before the work is continued.
Reduced lifting capacity at higher altitudes
Lifting capacity of the suction pads are set at 500m altitude at an atmospheric pressure of 950mbar.
With increase of height, atmospheric pressure reduces and so does lifting capacity.
This reduction has to be taken into account when lifting at altitudes above 500meter from sea level.
Altitude (meter) Atmospheric pressure (mbar) Lifting capacity
0 . . . 500 1050 . . . 950 100%
501 . . . 1000 949 . . . 900 95%
1001 . . . 1500 899 . . . 850 90%
1501 . . . 2000 849 . . . 800 85%
2001 . . . 2500 799 . . . 750 80%
2501 . . . 3000 749 . . . 700 75%
Rated lifting capacity on suction pads is calculated with
- most unflavourable (-vertical) position of suction pad
- vacuum level of -600 mbar
- safety factor of 2
B 4 Storage
The device should be stored as follows:
Overnight at job site:
- keep the unit in a dry and above 0
0
C secure place.
Long time storage when out of use :
- In a dry place at temperatures between 15 and 25
o
C.
- Switched off, water drained, charged battery and suction pad shielded.