Pressure; Dry Running; Disconnection; Storage - Danfoss APP W HC Series Operation Manual

Instruction | APP W HC 15-30 pumps
6.

Service

40

5.2 Pressure

The inlet pressure for APP W HC 15-30 must be
min . 2 barg (29 psig) and max . 5 barg (72 .5 psig) .
At lower pressures the pump will cavitate,
resulting in damage of the pump .
Max . inlet pressure peak (e .g . in case the pump
stops momentarily) up to 10 barg (145 psig) are
acceptable .
Max . pressure on the pump's outlet line should
be limited at 120 barg (1750 psig) continuously,
Note: The pump unit should include a pressure
gauge on the high-pressure side.

5.3 Dry running

When running, the pump must always be
connected to the water supply in order to avoid
damage if it should run dry .

5.4 Disconnection

If the inlet line is disconnected from the water
supply, the pump will be emptied of water
through the disconnected inlet line .
When starting up again, follow the bleeding
procedure described under section 4: Initial
start up .

5.5 Storage

Storage temperature:
Min . -40°C to max . +70°C
(Min . -40°F to max . +158°F)

6.1 Warranty

Danfoss APP W HC pumps are designed for long
operation, low maintenance and reduced
lifecycle costs .
Provided that the pump has been running
according to the Danfoss specifications, Danfoss
guarantees 8,000 hours service-free operation,
however, max 18 months from date of produc-
tion .
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 .
180R9410 | AQ282628894589en-000801 | IOM APP W HC 15-30 Pumps | 01.2022
When preparing the pump for long-term storage
or for temperatures below the freezing point,
flush the pump with an anti-freeze medium type
monopropylene glycol to prevent internal
corrosion or frost in the pump .
For further information on anti-freeze media,
please contact Danfoss High Pressure Pumps .
Recommended procedure:
1 . Disconnect the water supply to the pump .
2 . Through the lower bleeding plug, empty
the pump housing of water and close it
again .
3 . Connect the pump to a tank containing
anti-freeze additive . Connect a hose to the
inlet port of the pump and via another
hose return the flow from the outlet port to
the tank with antifreeze additives .
4 . Quickly start and stop the pump . Make
sure that the pump does not run dry.
The pump is now protected against
internal corrosion and frost .
Storage of pump that have been in operation:
For shorter periods of storage flush the pump
with permeate rotating the pump for 10 sec .,
empty permeate and store . For long term
storage (more than 2 months) Danfoss recom-
mends servicing the product and clean any
biological growth of the surfaces . Store the
pump dry without water inside .
If Danfoss recommendations concerning
system-design are not followed, it will strongly
influence the life of the APP W HC pumps .
Other factors that affect pump performance and
lifetime include:
- Running the pump at speed outside
specifications .
- Supplying the pump with water at
temperature higher than recommended .
- Running the pump at inlet pressure outside
specifications .
- Running the pump at outlet pressure
outside the specifications .