Danfoss ASV-I Installationshandbuch - Seite 3

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Installation Guide

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

Internal

Valve size

thread

DN 15

DN 20

DN 25

DN 32

1¼

DN 40

1½

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.

District Energy

Adjustment valve ASV-I

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

External

radiator valves must be fully open.

thread

G ¾ A

Setting/adjustment ❺

G 1 A

• Turn the valve knob fully

G 1¼ A

counterclockwise to open the valve.

G 1½ A

The mark on the knob will now be

G 1¾ A

opposite »0« on the scale ①.

G 2¼ A

• 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 flow.

To annul the setting, turn the hexagon

socket key fully clockwise (until a stop can

be felt), ④. Remember, at the same time

the knob must be held on its »0« setting.

Insulation (DN 15-40)

The styropor packaging in which the valve

is supplied can be used as an insulation

jacket for temperatures up to 80 °C.

VI.A1.K5.1T

3 3

DEN-SMT/SI