Translation of the original operating instructions
DUO
MIX
270
13
DM270_BAoDB_en_1507 • rs
Safety
Checklist on the pressureless machine:
5
Seal on the safety valve OK?
5
Safety valve externally free of damage?
5
Ground cable free of damage?
5
Ground cable connections on unit and conductor in good condition?
5
Compressed air shut-off valves movable?
Checklist on the pressurised machine:
5
Function of the safety valve OK?
When checking further safety equipment observe the operating instructions
for the optional accessories.
2.4.1 Safety valves
Safety valves are fitted to the
DUO
MIX
270
:
➤
In the air motor of the proportion-
ing pump (see Fig. 2)
➤
In the air motor of the flushing
pump
The safety valves prevent the maxi-
mum permissible air intake pressure
from being exceeded. If the air intake
pressure for the machine compo-
nents monitored by the safety valve
exceeds the limit value setting, the
safety valve installed here discharges.
Fig. 2: Safety valve
Check the function of a safety valve this way:
Increase the air intake briefly to approx. 10% above the maximum permissible
value according to the type plate. The safety valve must discharge.
WARNING
If the maximum permissible air intake pressure is exceeded, parts may rup-
ture. The consequences may be personal injuries and property damage.
➤
Never operate the machine without safety valves or with defective safety
valves!
➤
If it is necessary to replace a safety valve, please refer to the machine
card for the order number.
➤
With new safety valves, please ensure that these are set to the maxi-
mum permissible air intake pressure of the machine (see type plate or
machine card) and sealed.
Changing the mixing ratio changes the pressure transmission and therefore
also the maximum permissible air intake pressure.
In this case the existing safety valve must be replaced following agreement
with
WIWA
.
