Elmo Rietschle VC 200 - Manual (Page 7)

ᕤ
D
s
1
f
1
f
2
g
2
h
2
ᕥ
ᕦ
L
Y
W
Maintenance and Servicing
When maintaining these units and having such situations where personnel could be hurt by moving parts or by live electrical parts
the pump must be isolated by totally disconnecting the electrical supply. It is imperative that the unit cannot be re-started during
the maintenance operation.
Pumps that have reached operating temperature may
have a surface temperature at position (Q) of over 70°C.
WARNING! Do Not Touch.
1. Air filtration
The capacity of the pump can become reduced if the air
inlet filters are not maintained correctly.
Filters on the suction side: Mesh filter (f
1
) must be cleaned regularly
depending upon the amount of contamination. Cleaning can be
carried out by washing out or by blowing out with compressed air.
Replace filters if contaminated completely.
The mesh filter (f
1
) can be dismantled by removing screws (s
1
) on the
filter housing (D) (picture ᕤ).
Filter for Gas ballast: All pumps are equipped with a gas ballast
valve (U).
The built in filter cartridge (f
2
) must be cleaned regularly depending
upon the amount of contamination by blowing out with compressed
air. By removing the screw (g
2
) and plastic cap (h
2
) the filter ele-
ments can be removed for cleaning. Re-assemble in reverse order
(picture
ᕥ).
Filter Cartridge (Optional Extras): The filter cartridge of the vacuum
tight suction filter (ZVF) or dust separator (ZFP) must be cleaned
regularly again depending upon the amount of contamination. Clean-
ing can be achieved by washing or by blowing out with compressed
air. Replace the filter cartridge if necessary. The cartridge can be
removed completely by undoing the relevant retaining clips.
2. Lubrication (picture ᕢ)
The oil level must be checked at least once daily, if necessary put oil into the pump to the top level of the
oil sight glass (l). First oil change after 500 operating hours (see oil drain plug (K)): Further changes every
500 - 2000 operating hours. The oil change times should be shortened if the application is dusty.
The oil change should be made with the pump at normal operating temperature and discon-
nected from the suction pipework. If the pump is not completely drained, the amount of oil
required to refill is reduced.
Drain the oil also from the oil cooler (see oil drain plug (K
1
)).
Only oils corresponding to DIN 51 506 group VC / VCL or a synthetic oil (obtainable from Rietschle) should
be used. The viscosity must correspond to ISO-VG 100 according to DIN 51 519.
The recommended Rietschle Oil types are: MULTI-LUBE 100 (mineral oil); SUPER-LUBE 100 (synthetic
oil) (see oil type plate (M)).
When the oil is under a high thermal load, e.g. ambient or suction temperatures over 30°C, unfavourable
cooling or operating with increased speed etc., the oil change time can be extended by using the recom-
mended synthetic oil.
Old and used oil must be disposed of corresponding with the relevant health, safety and
environmental laws.
If the oil brand is changed, the old oil must be drained completely from oil separator housing and
the oil cooler.
3. Oil separation (picture ᕦ)
Extremely blocked filter elements will result in an increased pump temperature and will cause discolouration of the lubricant.
The oil separator elements may become contaminated after a long period of operation which can result in high pump temperature and motor
overload. We therefore recommend to change the filter
elements (L) every 2000 operating hours or when the filter
back pressure is in excess of 0.7 bar (see back pressure
gauge (Y)
➝ optional extra, checkup at short-term, atmos-
pheric suction). It is not possible to clean these elements.
To change filters: Remove maintenance cover (W). Ex-
change the elements (L). Before mounting the O-Ring of the
new oil separator element should be oiled liberally and the
oil separator element screws tightened with a force of 15 Nm
(spanner size 19 mm or
3 /
4
").
Re-assemble in reverse order.