Bosch PSG 3000 Series, Instructions For Assembly And Operation Manual

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PSU 5000 / PSG 3000
Instructions for Assembly and Operation
Installation
Cooling
1070 078 224--108
10--11
-- Damage to property through insufficient water quality in the cooling water cir-
cuit!
Deposits in the cooling system may reduce the water flow, thus impairing the
performance of the cooling system with time.
Therefore, you should ensure that your cooling water has the following proper-
ties:
-- pH value: 7 to 8.5
-- Degree of hardness D
max
: 10 German degrees
(1 German degree = 1.25 British degrees = 1.05 US degrees = 1.8 French
degrees)
-- Chlorides: max. 20 mg/l
-- Nitrates: max. 10 mg/l
-- Sulfates: max. 100 mg/l
-- Insoluble substances: max. 250 mg/l
Tap water usually meets these requirements. However, an algicide should be
added.
NOTE
-- Connecting lines and signal lines must be laid so as to avoid negative effects on
the function of the units through capacitive or inductive interference!
-- Interference is frequently coupled and de--coupled in long cables. Therefore,
inverter cables and control cables must be routed separately. The influence of
interfering cables on cables susceptible to interference can be minimized by
keeping the following distances:
> 100 mm with parallel connection of cables < 10 m
> 250 mm with parallel connection of cables > 20 m.
Install the inverters near the welding equipment in order to avoid cable lengths
> 25 m wherever possible.
-- A clearance of min. 100 mm must be available above and below air--cooled
modules. Lower clearances induce the danger of heat accumulations which
may result in a failure of the unit.