Filtration; Properties Of Water; Air Bubbles; Chemicals - Danfoss APP W HC Series Operation Manual

Operation guide | Installation, Operation and Maintenance APP W HC 15 - 30 pumps
4.

Arrival inspection,

transportation,
handling, lifting and
storage
8

3.7 Filtration

(10µm absolute [ß ≥ 5000])
10
Requirements are specified in appendix 1, Data
sheet and in appendix 2, Instruction .
Danfoss recommends not to build a filter bypass
function or to 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 pump.

3.8 Properties of water

Check Data sheet section 8, for TDS limits and
recommendations to avoid or reduce crevice
corrosion .

3.9 Air bubbles

Large bubbles in a pressurised RO system can
result in damage to piping, equipment and the
pump .
4.1 Arrival inspection
The pump is packed in a cardboard or wood box
with plugs in the port connections to protect the
pumps from damage during transportation .
When the shipment has arrived it is important to
check the pump for any damages . The name
plate/type designation must be in accordance
with the delivery note and your order .
In case of damage and/or missing parts, a report
should be documented and presented to the
carrier at once .

4.2 Warning

Before any lifting operation is performed,
environmental conditions must be taken into
consideration (Ex-rated areas, wind speed, wet/
dry conditions, lifting height, etc . ) .

4.3 General safety information

Personnel involved in lifting and transporting the
equipment (see Safety, chapter 2) must be
trained in handling and in safety procedures for
lifting heavy loads . Many of the pumps and
pump units weigh more than 20 kilos, which
requires lifting slings and suitable lifting devices;
e .g . an overhead crane or industrial truck to be
used as minimum .
180R9410 | AQ282628894589en-000801 | IOM APP W HC 15-30 Pumps | 01.2022
All air must be bleeded from both the low-
pressure and high-pressure side before the RO
system is pressurised . Special consideration
should be given in order to minimize air bubbles
in the feed flow . Air bubbles can cause cavitation .

3.10 Chemicals

All pumps comes with NBR seals and shaft seal,
ideal for water . When pumping water mixed with
chemicals, we recommend assessing or testing
the impact from the chemicals on the pump
materials (see Part List for full overview of
materials) . Danfoss product warranty doesn´t
cover cases where chemicals are the root cause
of the failure or claim . Additionally, use of certain
chemicals may lead to increase wear and require
part replacement more often than the Recom-
mended Service Intervals, which are based on
water .

4.4 Transport and handling

Small pumps which have a weight below 20 kilos
(weight can be found in appendix 1, Data sheet) .
can be handled by hand if they are not mounted
together with an electric motor . The weight of a
small pump with a motor will be above 20 kilos .