Heidolph ROTAVAC 20 - Manual (Page 10)

Documents are only to be used and distributed completely and unchanged. It is strictly the users´ responsibility to check carefully
the validity of this document with respect to his product. Manual-no.: 01-005-005-36-1
page 10 of 35 Translation of the original instructions
In case of overload, the motor is shut down by a self-hold thermal cutout in the
winding.
Note
: Only manual reset is possible. Switch off the pump and disconnect from the
power source. Identify and eliminate the cause of failure. Wait approx. five minutes
before restarting the pump.
1.7 Maintenance and repair
Wear parts have to be replaced regularly. In case of normal wear, the lifetime of
the diaphragms and valves is > 10000 operating hours. Bearings have a typical du-
rability of 40000 h. Motor capacitors have a typical durability in the range of 10000 to
40000 h depending strongly on operation conditions including ambient temperature,
humidity or load.
➨ Ensure that the pump cannot be operated accidentally. Never operate the pump
if covers or other parts of the pump are disassembled. Never operate a defective
or damaged pump.
➨ Isolate equipment from mains and wait two minutes before starting mainte-
nance to allow the capacitors to discharge.
➨ Attention: The pump might be contaminated with process chemicals which have
been pumped during operation. Ensure that the pump is decontaminated before
maintenance and take adequate precautions to protect people from the effects of
dangerous substances if contamination has occurred.
+ Take adequate precautions to protect people from the effects of dangerous sub-
stances if contamination has occurred. Use appropriate protective clothing, safety
goggles and protective gloves.
+ Wear parts have to be replaced regularly.
+ Never operate a defective or damaged pump.
+ Check every motor capacitor regularly by measuring its capacity and estimating
its time in operation. Replace old capacitors early enough to prevent a failure in
operation. If an old motor capacitor fails, the capacitor may get hot. It may even
melt or emit a flame, which could be dangerous for persons and equipment in
the vicinity. The capacitors have to be checked and replaced by an electrician.
+ Vent the pump before starting maintenance. Isolate the pump and other compo-
nents from the vacuum system. Allow sufficient cooling of the pump. Separate the
pump from the coolant circuit and drain condensate, if applicable.
Clean the surface of the device only with a damp cloth. Use water or a mild detergent
as cleaning agent.
Ensure that maintenance is done only by suitably trained and supervised techni-
cians. Ensure that the maintenance technician is familiar with the safety procedures
which relate to the products processed by the pumping system.
In order to comply with law (occupational, health and safety regulations, safety at
work law and regulations for environmental protection) vacuum pumps, components
and measuring instruments returned to the manufacturer can be repaired only when
certain procedures (see section ”Questions / Repair”) are followed.
NOTICE