Danfoss APP 11, APP 13, APP 16, APP 17, APP 19 Installation guide
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Instruction
Instruction
APP pump instruction
APP pumps
APP 11 / APP 13 / APP 16 /
APP 11-13 and APP 16-22
APP 17 / APP 19 / APP 22
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hpp.danfoss.com
Instruction | APP 11-13 and APP 16-22
Table of Contents
1. Identication ...........................................................................2
2. System design ..........................................................................3
2.1 Open-ended systems with direct water supply ..........................................3
2.2 Preferred RO system design and P&ID ...................................................4
2.3 Reversible pumps .......................................................................4
2.4 General comments on...................................................................4
3. Building up the pump unit ..............................................................5
3.1 Mounting ..............................................................................5
3.2 Direction of rotation ....................................................................6
3.3 Orientation .............................................................................6
3.4 Protection against too high outlet pressure ..............................................7
3.5 Connections ............................................................................7
4. Initial start-up ...........................................................................9
5. Operation..............................................................................10
5.1 Temperature...........................................................................10
5.2 Pressure ...............................................................................10
5.3 Dry running............................................................................10
5.4 Disconnection .........................................................................10
5.5 Storage ................................................................................10
5.5.1 Recommended procedure .............................................................10
6. Service.................................................................................11
6.1 Warranty ..............................................................................11
6.2 Maintenance...........................................................................11
6.3 Repair .................................................................................11
1. Identication
PUMP
Type APP 16
Code no. 180BXXXX
Serial no. XXXXXXXX-XXX
MADE IN DENMARK
Danfoss A/S, 6430 Nordborg, Denmark
2
180R9223 | 521B1184 | DKCFN.PI.013.T3.02 | 10.2019
Instruction | APP 11-13 and APP 16-22
2. System design The design of the system must ensure that
self-emptying of the pump during standstill is
avoided.
The inlet pressure of the pump must never
exceed the outlet pressure. This may typically
occur in boosted or open-ended systems with
direct water supply.
2.1 Open-ended systems with direct
water supply
The pump is supplied with water direct from a
feed pump.
In order to eliminate the risk of cavitation, a
positive inlet pressure of at least 2 barg (29 psig)
is always to be maintained, but it must not
exceed 5 barg (72.5 psig) continuously.
1. Place the lter (1) in the water supply line in
front of the pump.
2. Place a monitoring pressure switch (3)
between lter and pump inlet - set at min.
2 barg (29 psig) inlet pressure. The
monitoring pressure switch must stop the
pump at pressures lower than 2 barg
(29 psi g) inlet pressure.
3. Install a low pressure safety valve or a low
pressure relief valve (4) in order to avoid
system or pump damage in case the pump
stops momentarily (high-pressure peaks) or
starts spinning backwards.
Note: If a non return valve (2) is mounted in the
inlet line, a low-pressure relief valve is also
required between non return valve and pump
as protection against high-pressure peaks.
1
2
3
PS
Inlet
4
Outlet
180R9223 | 521B1184 | DKCFN.PI.013.T3.02 | 10.2019
3
Instruction | APP 11-13 and APP 16-22
2.2 Preferred RO system design and P&ID
1. Dimension the inlet line to obtain minimum pressure loss (large ow, minimum
pipe length, minimum number of bends/
connections, and ttings with small
pressure losses).
2. Place an inlet lter (1) in front of the APP
pump (2). Please consult the Danfoss lter
data sheet for guidance (521B1009) on how
to select the right lter. Thoroughly clean
pipes and ush system prior to start-up.
3. Place a monitoring pressure switch (3) set
at min. inlet pressure between lter and
pump inlet. The monitoring switch must
stop the pump at pressures lower than
minimum pressure.
4. Use exible 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.
Recommend to install safety valve or a
pressure relief valve (9) in order to avoid
high-pressure peaks in case the pump
stops momentarily or starts spinning
backwards.
6. For easy system bleeding and ushing, 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 ow backwards in case of the
pump stops momentarily.
8. A safety valve or a pressure relief valve (8)
can be installed in order to avoid system
damage as the Danfoss APP pump creates
pressure and ow immediately after
start-up, regardless of any counter
pressure.
Note: If a non-return valve is mounted in the
inlet line, a low-pressure relief valve is also
required between non return valve and pump
as protection against high-pressure peaks.
Media filter
9 3
1
PT
Feed
PI
PI
1
PI PI
5
Fresh water
permeat flush
2.3 Reversible pumps
If exposed to high pressure in the outlet while the
electric motor is not energized, the pump will start
spinning backwards. This will not harm the pump
as long as the pressure in the inlet does not exceed
the max. pressure peak of 10 barg (145 psig).
If a non-return valve is mounted in the inlet line,
a low-pressure relief valve is also required as
protection against high-pressure pulses and high
pressure in general.
Alternatively a high-pressure check valve can be
mounted in the pump discharge line to prevent
the pump from reversing.
The dotted setup ensures that the inlet pressure
does not exceed 10 barg (145 psig), when a
non-return valve is mounted in the inlet.
Attention: In order to avoid the risk of cavitation, the inlet pressure at the pump must be
min. 2 barg (29 psig).
The inlet line connection must be properly
tightened, as possible entrance of air will cause
cavitation.
M
2
7
8
PI
Permeate
4
6
PI
Brine
2.4 General comments on
Filtration
A good ltration is vital to ensure a long and
trouble free life of the pump.
As water has very low viscosity, the APP pumps
have been designed with very narrow clearance
in order to control internal leakage rates and
improve component performance. Therefore it is
important that the inlet water is ltered properly
to minimize the wear of the pump.
The main lter must have a ltration eciency of
99.98% at 10 µm. We recommend to use
precision depth lter cartridges rated 10 µm abs.
≥
ß
5000 (equivalent to a ltration eciency of
10
99.98%). Bag lters and string wounded lter
cartridges typically have only 50% ltration
eciency. This means that for each 100,000
particles reaching the lter, 50,000 particles pass
through it compared to only 20 particles in a
lter with an eciency of 99.98%.
4
180R9223 | 521B1184 | DKCFN.PI.013.T3.02 | 10.2019
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