Filtration; Properties Of Water; Air Bubbles; Chemicals - Danfoss PAHT Operation, Installation, And Maintenance Manual

Operation guide
4.

Arrival inspection,

transportation,
handling, lifting and
storage
8 | 180R9288_AQ109686503100en-001301
Installation, Operation and Maintenance Manual for PAHT 20-90 pumps

3.7 Filtration

(10µm absolute [β ≥ 5000])
10
Requirements are speci ed in appendix 1, Data
sheet and appendix 2, Instruction.
Danfoss recommends not to build a lter bypass
function or use lters 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 lter via the di erential/delta pressure across
the lter.
Using insu cient ltration or a lter bypass can
cause a failure or decreased service life of the
pump.

3.8 Properties of water

4.1 Arrival inspection
The pump is packed in a cardboard or wood box
with plugs in the port connections to protect the
pump 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 safety procedures when
lifting heavy loads. Many of the pumps and
pump units weigh more than 20 kilos, which
requires lifting slings and suitable lifting devices;
It is recommended NOT to use the pump for
other media than speci ed in the Data sheet.

3.9 Air bubbles

Large bubbles in a pressurised system can result
in damage to piping, equipment and the pump.
All air must be bleeded from both the low-
pressure and high-pressure side before the
system is pressurised. Special consideration
should be given in order to minimize air bubbles
in the feed ow. Air bubbles can cause 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 pump.
e.g. an overhead crane or industrial truck to be
used as minimum.

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.
© Danfoss | 2023.12