Z
Y
X
O
1
N
Q
L
M
Q
G
K
Q
O
h / v
a
���
���
Initial Operation (pictures
���
and
���
)
1. Initially switch the pump on and off for a few seconds to check the direction of rotation against the direction arrow (O).
Note: On this initial start the suction pipework should not be connected. If the pump runs backwards with the pipework connected
a pressure could build up within the housing which could result in damaged rotor blades.
2.Connect the suction pipes at (A
1
) and (A
2
); pressure pipe at (B).
For pipe work longer than 3 m we recommend using non-return-valves (ZRK), to avoid reverse rotation when the units are switched
off.
3. The requested pressure- and vacuum ranges can be adjusted by turning the pressure regulating valve (D) and the vacuum regulating valve (C)
according to the symbols on the top of the regulating valves.
Potential risks for operating personnel
Noise Emission: The worst noise levels considering direction and intensity measured according to DIN 45635 part 3 (as per 3. GSGV) are shown
in the table at the back. When working permanently in the vicinity of an operating pump we recommend wearing ear protection to avoid any
damage to hearing.
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. Do not maintain a pump that is at its normal operating temperature as there is a danger from hot parts.
1. Lubrication (picture
���
)
The model TR 20 DVV has bearings which are greased for life. They need not be serviced. Model TR 81 DVV must be greased every 5,000
operating hours or at least twice a year with 12g of grease at greasing point (L). Excessive grease will leave at grease exit (K). We recommend
Chevron SRI Grease 2 or equivalent constant temperature greases (see greasing label (M)).
The use of inferior grease could cause damage of the bearings.
2. Blades (picture
���
)
Checking blades: TR..DVV have 7 carbon blades which have a low but permanent wear factor.
TR 20 DVV: first check after 5,000 operating hours, thereafter every 1,000 operating hours.
TR 81 DVV: first check after 4,000 operating hours, thereafter every 1,000 operating hours.
Remove housing cover (G), remove blades (a) for checking. All blades must have a minimum height (X):
Model
X (minimum height)
Model
X (minimum height)
TR 20 DVV
29 mm
TR 81 DVV
45 mm
Blades must be changed completely.
Changing blades: if the minimum height (X) is reached then the whole set of blades (7 pieces) should be changed.
Before fitting new blades clean the housing and rotor slots with compressed air. Place the blades with the radius outwards (Y) so that the bevel
is in the direction of rotation (O
1
) and corresponds with the radius of the housing (Z). Fix end cover (G). Before restarting the pump check free
movement of the blades by turning the motor cooling fan (v), before refitting the fan cover (h).
3. Air filtration
The ca,pacity of the pressure/vacuum pump can be reduced
if the air inlet filters are not maintained correctly.
a. Inlet filter (picture
���
): These filter cartridges (f
1
) should be cleaned
monthly and changed yearly depending on the degree of contamina-
tion.
Inlet cartridge changing: remove thumb screws (m
1
). Remove filter
cover (d
1
) complete with gasket (e
1
). Remove milled nut (r) in front of
filter. Pull filter cartridges (f
1
) off and clean either by knocking out by
hand or using compressed air. Reassemble in reverse order.
b. Exhaust filter (picture
���
➝
TR 20 DVV
and picture
���
➝
TR 81
DVV): filter cartridges (f
2
) have to be cleaned every 250 operating
hours and replaced every 3,000 operating hours.
Exhaust cartridge changing: remove thumb screws (m
2
), Remove
filter cover (d
2
) complete with gasket (e
2
). Press filter cartridges (f
2
)
out and remove. Clean the filter either by knocking out by hand or
using compressed air. Reassemble in reverse order.
c. Vacuum regulating valve (picture
���
and
���
):
We recommend disassembling and cleaning the vacuum regulating
valve every 6 months. Remove valve from the line. Unscrew the
threaded pin (t). Remove knob (n) from valve body (w). Pull off
spring (q) and valve plate (u) from the valve insert (p). Clean all parts
and dry thoroughly. Reassemble all parts free of any oil or grease.
(The valve plate (u) should move smoothly on the valve insert (p)).
