User manual
Installation, Operation and Maintenance APP Pumps (APP 5.1-10.2)
8
180R9263 / IOM APP Pumps - v01 / 01.2013
3.1 Approved applications and operational
limits for the pumps
The pump and the pump units are designed for
the use in a Sea Water Reverse Osmosis (SWRO)
or Brackish Water Reverse Osmosis (BWRO)
systems.
The APP pumps must not be used for other
purposes than those recommended and
specified without first consulting your local
pump distributor.
Use of the pump in other applications not
suitable for the pump unit can cause damages
to the pump unit, with risk of personal injury.
For system integration of the pumps, please
see Data sheet and Instruction which are found
in appendix 1 (Data sheet) and 2 (APP pump
instruction).
3.2 Application range
See Data sheet in appendix 1 .
3.3 Electric motor data
See recommended motor in Data sheet,
appendix 1 or IOM for motors, appendix 3 . The
motors mentioned are the most common used
motors by Danfoss High Pressure Pumps .
3.4 Noise and vibration
Noise level for a motor pump unit with a
”standard” motor measured according to
EN ISO 3744:2010, see Data sheet in appendix 1 .
Possibilities to reduce noise and vibration are
described in the same Data sheet .
3.5 General arrangement
Dimensions for the different pumps, see Data
sheet in appendix 1 .
3.
Technical data
3.6 Space requirement
For service and replacement of the complete
motor pump unit, it is recommended having
sufficient space around the unit .
For easy access to the unit, at least 1 meter/
40 inches available space should be kept free
around the pump . When working with high
pressures, space demands should reflect the
required safety requirements .
3.7 Filtration
(10µm absolute [ß10 =5000])
Requirements are specified in Data sheet,
appendix 1 and APP pump instruction, appendix
2 .
Danfoss recommends not to build a filter bypass
function or use filters with an integrated bypass .
If the above recommendation is not followed the
warranty for the pump will automatically
become void .
It should be possible to monitor the condition of
the filter via the differential/delta pressure across
the filter .
Using insufficient filtration or a filter bypass
can cause a failure or decreased service life of
the pumps.
3.8 Properties of water
It is recommended NOT to use the pumps in feed
water concentrations higher than 50,000 ppm
TDS without consulting your local Danfoss pump
distributor .
3.9 Air bubbles
Large bubbles in a pressurised RO system can
result in damage to piping, equipment and the
pumps .
All air must be bleeded from both the low-
pressure and high-pressure side before the RO
system is pressurised . Special consideration
should also be given to air bubbles in feed flow
and continuously feed into the pumps as it else
can give cavitation .
3.10 Chemicals
The pumps should not be exposed to any
chemicals that can result in damage to piping,
equipment and internal parts of the pumps .
