Danfoss PAH 2 User Manual

Instruction Pump instruction PAH / PAHT 2-12.5
40 |
© Danfoss | DHS (im) | 2022.07
1180R9379 | AQ188686503004en-000801 | PAH 2-12.5
4. Initial start-up Before start-up, loosen the top bleeding plug “C”.
When water appears from the bleeding plug,
retighten the plug. With its inlet line connected
to the water supply or the tank, the pump is now
started with open outlet port.
At the initial start of the system, the pump
should be run without pressure for about 5
minutes, thus removing possible impurities from
pipes, hoses, etc. However, the system should be
ushed before start-up.
Warning:
Make sure that the direction of rotation of the
electric motor corresponds to the direction of
rotation of the pump. Otherwise the pump will
be damaged if a check valve is placed between
pump and tank.
5.1 Water quality
Water of drinking water quality, conrming to
the EEC directive 98/83/EC and without abrasive
sediments. Please contact Danfoss sales
organization in case of doubt.
5.2 Temperature
In case of lower operating tempera tures, please
contact the Danfoss Sales Organization.
5.3 Pressure
The inlet pressure must be between min. 0 barg/
0 psig and max. 4 barg/60 psig. The use of pump
outside this range damage the pump.
Max. pressure on the pump’s outlet line should
be limited at 140 barg (2030 psig) continuously.
NB: The pump unit should include a pressure
gauge on the high pressure side.
5.4 Dry running
When running, the pump must always be
connected to the water supply in order to avoid
damage if it should run dry.
In systems with water tank it is recommended to
build in a level gauge in the tank to avoid the risk
of running dry.
5.5 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.
5.6 Storage
When preparing the pump for long-term storage
or for temperatures below the freezing point,
ush 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
the Danfoss Sales Organization.
Recommended procedure
5.6.1 Water hydraulic systems, water recircu-
lated
1. Disconnect the power pack from the
system.
2. Empty the tank of water. Fill up the tank
with anti-freeze medium to a level well
above the suction line.
3. Start up the power pack and, for a couple
of minutes, in a closed loop system let the
anti-freeze medium run back to tank
through the pressure relief valve or the
bypass valve.
4. Empty the tank of the anti-freeze medium.
Empty the pump through the lower
bleeding plug.
The pump is now protected against internal
corrosion and frost.
5. Operation
Fluid
temperature
Min. +2° C to
max. +50° C
Ambient
temperature
Min. 0° C to
max. 50° C
Storage
temperature
Min. -40° C to
max. +70° C

Danfoss PAH 2 Specifications

General

Brand	Danfoss
Model	PAH 2
Category	Water Pump
Language	English