11
180R9267 / IOM APP 1.5-3.5 Appendices - v04 / 11.2013
Data sheet
APP pumps - APP 1.5-3.5
8
521B0850 / DKCFN.PD.013.FA6.02 / 09.2012
10.2 Complete unit
Pump
A
(mm)
B
(mm)
C
(mm)
D
(mm)
E
(mm)
F
(mm)
G
(mm)
H
(mm)
IEC Electric motor
APP 1.5
250
260
100
160
140
325
120
166
3.0 kW, IEC 100L-2
APP 1.8
250
290
112
190
140
340
120
166
4.0 kW, IEC 112M-2
APP 2.2
300
338
132
216
140
403
144
166
5.5 kW, IEC 132S1-2
APP 2.5
300
338
132
216
178
403
144
166
7.5 kW, IEC 132S2-2
APP 3.0
350
422
160
254
210
505
188
166
11 kW, IEC 160M1-2
APP 3.5
350
422
160
254
210
505
188
166
11 kW, IEC 160M1-2
11. Installation
11.1 Mounting
The figure below illustrates how to mount the
pump and connect it to electric motor/combus-
tion engine.
A: Flexible coupling
B:
Bell housing
C:
Motor shaft
If alternative mounting is required, please
contact Danfoss Sales Organization for further
information.
To ensure easy mounting of the flexible coupling
without using tools, the tolerances must be
dimensioned accordingly.
Note: Any axial and/or radial loads on the shaft
must be avoided.
The pump should be connected to the rest of the
plant with flexible hoses.
A
C
B
Min. 5 mm
Data sheet
APP pumps - APP 1.5-3.5
9
521B0850 / DKCFN.PD.013.FA6.02 / 09.2012
11.2 Open-ended system with direct water
supply
In order to eliminate the risk of cavitation, a
positive inlet pressure is always to be main-
tained. Please see technical data (part 3.) for
specific pressure values.
1.
Place the filter (1) in the water supply line in
front of the pump.
2.
Place a monitoring pressure switch (2) - set
at min. inlet pressure - between filter and
pump inlet. The monitoring switch must
stop the pump at pressures lower than min.
inlet pressure. Please see technical data
(part 3.) for specific pressure values.
11.3 RO system with APP pump
1.
Dimension the inlet line to obtain mini-
mum pressure loss (large flow, minimum
pipe length, minimum number of bends/
connections and fittings with small
pressure losses).
2.
Place an inlet filter (1) in front of the APP
pump (2). Please consult section 9,
“Filtration” for guidance on how to select
the right filter. Thoroughly clean pipes and
flush system prior to start-up.
3.
Place a monitoring pressure switch (3) set
at min. inlet pressure between filter and
pump inlet. The monitoring switch must
stop the pump at pressures lower than
minimum pressure.
4.
Use flexible hoses (4) to minimize vibrations
and noise.
5.
In order to eliminate the risk of damage
and cavitation, a positive pressure at the
inlet (5) is always to be maintained at min.
inlet pressure and max. inlet pressure.
6.
For easy system bleeding and flushing, a
bypass non-return valve (6) is integrated in
the APP pump.
7.
A non-return valve (7) in outlet can be
installed in order to avoid backspin of the
pump. The volume of water in the
membrane vessel works as an accumulator
and will send flow backwards in case of the
pump stops momentarily.
8.
A safety valve (8) can be installed in order
to avoid system damage as the Danfoss
APP pump creates pressure and flow
immediately after start-up, regardless of
any counter-pressure.