Danfoss AVQM Manual Del Usuario página 8

AVQM, AVQMT – PN16 (DN 15-32) / PN25 (DN 15-50)
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.
Disposal
This product should be dismantled
and its components sorted, if
possible, in various groups before
recycling or disposal.
Always follow the local disposal regulations.
Definition of Application
The controller is in combination with electrical
actuators AMV(E) used for flow and temperature
control of water and water glycol mixtures for
heating, district heating and cooling systems.
AVQM PN 16 could be combined with electrical
actuators AMV(E) 10/13 (DN15 only), AMV(E) 20/23,
AMV 20/23 SL, AMV(E) 30/33, AMV 30, AMV 150.
AVQM(T) PN 25 could be combined with electrical
actuators AMV(E) 10/13 (DN15 only), AMV(E) 20/23,
AMV 20/23 SL, AMV(E) 30/33, AMV 30, AMV 150.
AVQMT PN 25 could be combined with
temperature actuator AVT or safety temperature
monitor (actuator) STM.
The technical parameters on the product labels
determine the use.
Assembly
Admissible Temperatures ❶
Admissible Installation Positions ❷
① Media temperature <100°C:
Any position
② Media temperature 100°C to 130°C:
Horizontal and control valve up
③ Media temperature >130° to 150°C:
Control valve up
Other details:
See instructions for electrical actuator
AMV(E). In case of AVQMT controller
see instructions for temperature actuator AVT
or safety temperature monitor (actuator) STM
as well.
8 | © Danfoss | 2017.04
Installation Location and Installation
Scheme
AVQM(T) flow and return mounting ❸
Valve Installation
❹
1. Clean pipeline system prior to assembly.
2. The installation of a strainer ① in front of the
controller is strongly recommended.
3. Install valve
• The flow direction indicated on the
product label ② or on the valve ③ must be
observed.
• Spot weld to the pipeline ④.
Remove the valve and selas prior final
welding. ⑤⑥
If the valve and seals are not removed, high
welding temperatures may destroy them.
• Flanges ⑦ in the pipeline must be in
parallel position and sealing surfaces must
be clean and without any damage.
Tighten screws in flanges crosswise in 3
steps up to the maximum torque (50 Nm).
4. Caution:
Mechanical loads of the valve body by the
pipelines are not permitted ⑧.
Mounting of electrical actuator ❺
Place electrical actuator AMV(E) on the valve and
tighten union nut with wrench SW 32.
Torque 25 Nm.
Other details:
See instructions for electrical actuator
AMV(E).
Mounting of temperature
actuator ❻
(relevant only at AVQMT controllers)
Place temperature actuator AVT or STM at the
diaphragm and tighten union nut with wrench
SW 50.
Torque 35 Nm.
Other details:
See instructions for temperature
actuator AVT or STM.
Insulation ❼
For media temperatures up to 100 °C the pressure
actuator ① may also be insulated.
Insulation of electrical actuator ②
AMV(E) is not allowed.
Start-up ❽
Filling the system, first start-up
1. Open valves in the system.
2. Slowly open shut-off devices ① in the flow
pipeline.
3. Slowly open shut-off devices ② in the return
pipeline.
Leak and Pressure Tests
Do not test closed control valve with pressures
of more than 16 bar. Otherwise, the valve may
be damaged.
Pressure tests should be carried out prior to
the installation of the electrical actuator. This
guarantees that the valve is opened.
Before pressure test, open the adjustable flow
restrictor by turning it in counter clock direction:
Pressure must be gradually increased
at the (+/-) connection ③.
Non-compliance may cause damages at the
actuator or the valve.
A pressure test of the entire system must be carried
out in accordance with manufacturer's instructions.
The maximum test pressure is: 1,5 × PN
PN – see product label!
Putting out of operation
1. Slowly close shut-off devices ① in the flow
pipeline.
2. Slowly close shut-off devices ② in the return
pipeline.
Max flow limiting ❾
The flow rate is adjusted by means of limitation of
control valve stroke .
There are two possibilities:
1. Adjustment with the flow adjusting curves,
2. Adjustment with heat meter.
Pre-condition
The setting should be carried out when the
electrical actuator AMV(E) is dismounted.
If the electrical actuator is mounted, the stem of the
actuator must be retracted.
Adjustment with flow adjusting
curves ❿
The system don't need to be active for being
adjusted.
1. Remove sealing ring ①
2. Close control valve ② by turning the
adjustable flow restrictor clockwise to its
stop.
3. Select flow adjusting curve in the diagram
(see ⓬ for PN 16)
(see ⓭ for PN 25)
Necessary
flow rate
No
Revolutions of
adjusting throttle
3. Open control valve with the adjustable
flow restrictor by determined number of
revolutions counter clockwise ③.
VI.LI.F2.3F