Danfoss ASV-P - Manual (Page 3)

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Balancing valve ASV-P is used together
with shut-off and measuring valve
ASV-M to control the differential pressure
in riser pipes where radiator valves have
presetting facilities ❶.
ASV-P maintains constant differential
pressure across the pipes.
Max. working pressure ............................16 bar
Differential pressure
across valve .............................. 10-max.150 kPa
Max. flow temperature............................120 °C
Valve size
Internal
thread
External
thread
DN 15 Rp ½ G ¾ A
DN 20 Rp ¾ G 1 A
DN 25 Rp 1 G 1 ¼ A
DN 32 Rp 1 ¼ G 1 ½ A
DN 40 Rp 1 ½ G 1 ¾ A
Impulse line: G 1/16
Installation
ASV-P must be installed in the return pipe.
The flow must be in the direction of the
cast-in arrow ❸①.
It is recommended that an FV filter be
installed in the system flow pipe.
The impulse tube must be fitted on the
flow pipe, e.g. via an ASV-M valve. The tube
must be flushed through before being
fitted on the + connection of the ASV-P
balancing valve ❷.
ASV-P must in addition be installed as
determined by installation conditions.
When the system has been in use for
some time, the connections with external
threads should be tightened once again to
minimize the risk for leakage.
Shut-off
Turning the ASV-P knob fully clockwise will
shut off the balancing valve ❷①.
Pressure testing
Max. test pressure .................................... 25 bar
Note:
When pressure testing you must secure that
both sides of the membrane have the same
static pressure. That means the impulse tube
must be connected and any needle valves
must be open. If ASV-P/PV is installed in
combination with ASV-M both valves can
be open or closed (both valves must be in
the same position!). If ASV-P/PVis installed
in combination with ASV-I both valves must
be open. If this instruction is ignored, the
membrane of the automatic balancing valve
might be damaged.
Starting
You can fill the system with the drain-
cock on ASV-P/PV. The system shall be
ventilated at the highest point. When
opening the shut-of from ASV-P/PV please
secure that you have the same static
pressure on both sides of the membrane.
Note!
If this procedure is not followed ASV-P may
become locked in closed position even if the
valve is fully opened.
Tapping
The cock (closed, ❸② - open, ❸③ can be
used for water tapping and filling.
Fault location
Check the following if the balancing valve
does not function correctly:
1. Is the flow direction through the valve
correct?
2. Is the impulse tube fitted correctly and
are any needle valves open?
3. Is the valve shut-off open?
Accessory Code no.
Impulse tube, 1.5 m 003L8152
Impulse tube, 5 m 003L8153
Measuring connection for
cock
003L8143
Insulation
The styropor packaging in which the valve
is supplied can be used as an insulation
jacket for temperatures up to 80 °C.
Installation Guide ASV-P
Danfoss Heating VI.A1.J1.5H DH-SMT/SI
ENGLISH