Dutypoint VT Booster Set, Руководство по эксплуатации и обслуживанию, Страница: 35 / 123

English (GB)
G
6
5.5 Maximum inlet pressure
The table on page 16 states the maximum permissible inlet
pressure. However, the actual inlet pr maximum pump
pressure (at no flow) must always be lower than the values stated
in fig. A, page
15 .
The pumps are pressure-tested at a pressure of 1.5 times the
values stated in fig. B, page
16 .
5.6 Minimum flow rate
Due to the risk of overheating, do not use the pump at flows
below the minimum flow rate.
The curves below show the minimum flow rate as a percentage of
the nominal flow rate in relation to the liquid temperature.
- - - - = air-cooled top.
Fig. 5
Minimum flow rate
5.7 Electrical data
See motor nameplate.
5.8 Frequency of starts and stops
5.9 Dimensions and weights
Dimensions: See fig. C, page 17 .
Weights: See label on the packing.
5.10 Sound pressure level
See fig. D, page 18 .
6. Installation
The pump must be secured to a horizontal, plane and solid
foundation by bolts through the holes in the base plate.
When installing the pump, follow the procedure below in order to
avoid damaging the pump.
T
M
01
28
1
6 23
0
2
Caution
The pump must not run against a closed
discharge valve.
Motor size
[kW]
Maximum number of starts per hour
≤ 3 200
4-30 100
37-55 75
75 50
40 60 80 100 120 140 160 180
t [°C]
0
10
20
30
Qmin
[%]
Step Action
1
TM
02
00
13
38
00
Arrows on the pump base show
the direction of flow of liquid
through the pump.
2
T
M
00
22
56
33
9
3
This information is stated on
page
17 :
• port-to-port lengths
• dimensions of the base
• pipework connections
• diameter and position of
foundation bolts.
3
T
M
01
12
41
40
97
The pump can be installed
vertically or horizontally
(CR, CRN 120 and 150, 75 kW,
only vertically). However, the
motor must neither fall below
the horizontal plane nor be
installed upside down.
Ensure that an adequate
supply of cool air reaches the
motor cooling fan.
Motors above 4 kW must be
supported.
4
T
M
0
2 01
16
38
00
To minimize possible noise
from the pump, we advise you
to fit expansion joints on either
side of the pump.
The foundation/installation
must be carried out as
described in section
6.1
.
Fit isolating valves on either
side of the pump to avoid
draining the syestem if the
pump needs to be removed for
cleaning, repair or
replacement.
Always protect the pump
against backflow by means of a
non-return valve (foot valve).
5
TM0
2 0
114
38
00
Install the pipes so that air
locks do not occur, especially
on the suction side of the
pump.
6
TM
02
01
1
5
3
8
0
0
Fit a vacuum valve close to the
pump if the installation has one
of these characteristics:
• The discharge pipe slopes
downwards away from the
pump.
• There is a risk of siphon
effect.
• Protection against backflow
of unclean liquids is needed.
2
1
2
1
L
L
B
4 x ø
B