Heidolph ROTAVAC 20 - Manual (Page 22)

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 22 of 35 Translation of the original instructions
order no.
+ Please read section ”Replacing diaphragms and valves” completely before
starting maintenance.
The pictures may show other versions of pumps. This does not change the method of replacing dia-
phragms and valves.
Tools required (metric):
- Torx driver T20
- Allen key size 5
- 2.5 mm wide slotted screwdriver
- Flat pliers
- Diaphragm key width 66 mm
➨ Never operate the pump if covers or other parts of the pump are disassem-
bled. Ensure that the pump cannot be operated accidentally.
➨ Before starting maintenance isolate the pump from the electrical supply and
wait two minutes after isolating the equipment from mains to allow the capaci-
tors to discharge.
➨ Attention: The pump might be contaminated with the process chemicals that
have been pumped during operation. Ensure that the pump is decontaminated
before maintenance. Avoid the release of pollutants.
+ Never operate a defective or damaged pump.
+ Wear appropriate safety-clothing when you come into contact with contaminated
components.
+ Check every motor capacitor regularly by measuring its capacity and estimating
its service life. Replace old capacitors early enough to prevent a failure. The ca-
pacitors must be checked and replaced by a trained electrician.
+ Vent the pump and isolate it from the vacuum system before you start mainte-
nance.
Allow sufficient cooling of the pump before starting maintenance.
Ensure that maintenance is done only by suitable trained and supervised techni-
cians.
All bearings are encapsulated and are filled with long-life lubricant. Under normal
operating conditions, the pump is maintenance free. The valves and diaphragms as
well as the motor capacitors are wear parts. If the rated ultimate vacuum is no longer
achieved or in case of increased noise level, the pump interior, the diaphragms and
the valves must be cleaned and must be checked for cracks or other damage.
Depending on individual cases it may be efficient to check and clean the pump heads
on a regular basis. In case of normal wear the lifetime of the diaphragms and valves
is > 10000 operating hours.
- Prevent internal condensation, transfer of liquids or dust. The diaphragm and
valves will be damaged, if liquids are pumped in significant amount.
- If the pump is exposed to corrosive gases or vapor or in case of deposits, main-
tenance should be carried out frequently.
- Regular maintenance will improve the lifetime of the pump and also protect both
man and environment.
NOTICE
6 Replacing diaphragms and valves
Set of seals Rotavac 20..................................................................................................... 11-300-009-32
Valve Rot.-Valve Contr./Rotavac 20 ................................................................................. 23-30-01-01-89
Diaphragm Rot.-Valve Contr./Rotavac 20 ......................................................................... 23-30-01-06-22
Diaphragm key Rot.-Valve Contr./Rotavac 20 .................................................................. 02-07-02-01-14