Danfoss ASV-I 50 Installationsanleitung Seite 3

Adjustment valve ASV-I
ENGLISH
Adjustment valve ASV-I is used together with
riser valve ASV-P/PV to control the differential
pressure in risers where the radiator valves have
no presetting facilities ➊.
Function
ASV-I gives maximum limitation of water flow
(see Setting/adjustment) and the riser can
be shut off by turning the knob (❷①) fully
clockwise.
Max. working pressure .................................... 16 bar
Differential pressure
across valve ................................................ 10-150 kPa
Max. flow temperature .................................... 120 °C
Valve size Internal thread
DN 15 R ½
p
DN 20 R ¾
p
DN 25 R 1
p
DN 32 R 1¼
p
DN 40 R 1½
p
DN 50 -
Impulse line: G 1⁄16
Installation
ASV-I must be installed in the riser flow pipe.
The direction of flow must be from port B to
port A ❸. It is recommended that an FV filter be
installed in the system supply pipe.
The impulse line from the riser valve must be
fitted using an 8 mm open-ended spanner.
ASV-I must in addition be installed as
determined by installation conditions.
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/PV is 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.
Flow measurement
The differential pressure across the valve can be
measured by Danfoss measuring equipment.
When the quick couplings on the measuring
instrument are connected, the test plugss
can be opened by giving them a half-turn
counterclockwise with an 8 mm open-ended
spanner. The pressure loss graph for ASV-I ❹
can be used to convert the actual differential
pressure across the valve to actual flow. After
measurements have been taken, the plugs must
be closed again by turning them clockwise
before removing the quick couplings.
Note: When measuring sized flow, all radiator valves
must be fully open.
AQ14678647944001-010601
Setting/adjustment ❺
• Turn the valve knob fully counterclockwise
to open the valve. The mark on the knob will
now be opposite »0« on the scale ①.
• Turn the valve knob clockwise to the
required setting (e.g. for setting 2,2 the knob
must be rotated two full turns and then
forward to »2« on the scale ②.
• Hold the knob to keep the setting (e.g. 2,2)
and using a hexagon socket key turn the
spindle fully counterclockwise (until a stop
can be felt), ③.
• Turn the valve knob fully counterclockwise
so that the mark on the knob is opposite »0«
on the scale ①. The valve is now open as
many turns from the closed position (2,2) as
indicated by the convertion from required
External
thread
flow.
G ¾ A
To annul the setting, turn the hexagon socket
G 1 A
key fully clockwise (until a stop can be felt), ④.
G 1¼ A
Remember, at the same time the knob must be
G 1½ A held on its »0« setting.
G 1¾ A
Insulation (DN 15-40)
G 2¼ A
The styropor packaging in which the valve is
supplied can be used as an insulation jacket for
temperatures up to 80 °C.
© Danfoss | 2021.09 | 3