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Beschikbare talen
AVPL, AVPL-F
ENGLISH
Safety Notes
Prior to assembly and commissioning to avoid
injury of persons and damages of the devices,
it is absolutely necessary to carefully read and
observe these instructions.
Necessary assembly, start-up, and maintenance
work must be performed only by qualified,
trained and authorized personnel.
Prior to assembly and maintenance work on the
controller, the system must be:
- depressurized,
- cooled down,
- emptied and
- cleaned.
Please comply with the instructions of the
system manufacturer or system operator.
Definition of Application
AVPL(-F) is a self-acting differential pressure
controller for PN 16 with adjustable or fixed
differential pressure setting. The controller is
supplied with impulse tube, O-ring gasket and
tail-piece socket for pressure connection
(fig. ❶).
The technical parameters on the product labels
determine the use.
Assembly
Admissible Installation Positions ❷
-
The controller can be installed in any
position.
Installation:
The control valve body must be installed in the
heating system return with flow in the direction
of the arrow (fig. ❹). The valve can be installed
in any orientation position. The Danfoss strainer
type FV or similar must be installed in the
direction of the flow (fig. ❹) in front of the
controller. The impulse tube must be mounted
horizontally on the pipe to prevent impurities
from flowing into the impulse tube. ❺
4 | © Danfoss | 2022.09
Starting up:
Filling the system, first start-up
1. Slowly open shut-off devices in the
flow pipeline.
2. Slowly open shut-off devices in the
return pipeline.
Putting out of operation
1. Slowly close shut-off devices in the
flow pipeline.
2. Slowly close shut-off devices in the
return pipeline.
Setting:
(not relevant at fixed setting version AVPL-F)
The differential pressure can be set by
means of an Allen key NV 3 (fig. ❻).
On delivery the controller is set to 10 kPa
(0.1 bar). 1 turn corresponds with 1 kPa
(0.01 bar). The arrow on the controller top
shows that the setting of the differential
pressure is increased when it is turned
clockwise.
Note that the stop is reached after 20
turns.
Seal:
❼
The set-point adjuster can be sealed by a seal
wire, if necessary.
Fault location:
If the controller does not operate properly check
whether:
- valve body is mounted correctly (arrow points
in flow direction)
- impulse tube is mounted correctly
- impulse tube connection is blocked
Pressure testing:
Impulse tube and needle valves, if any, must be
open during pressure testing.
Max. test pressure PN 16 ...... 25 bar.
AQ00008644555102-010202
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