Danfoss PCVA User manual

© Danfoss | 2016.06 VI.JA.D2.5B | 1
Pressure relief controller PCVA,
Safety pressure relief controller PCVSAA
English Page 2
Instructions
Hilfsgesteuerters Überströmregler PCVA,
Hilfsgesteuertes Sicherheitsüberströmventil PCVSAA
Deutsch Seite 15
DN 100- DN 250
PN 16/PN 25
Einbau-, Bedienungsanleitung

Instructions PCVA, PCVSAA
2 | © Danfoss | 2016.06 VI.JA.D2.5B
Table of Contents 1 Safety Notes ............................................ 3
2 Definition of Application ....................... 3
3 Description .............................................. 4
3.1 Construction..........................................................4
3.2 Mode of Operation .............................................4
4 Technical Data ......................................... 4
5 Scope of Delivery .................................... 5
6 Assembly.................................................. 6
6.1 Prior to Assembly.................................................6
6.2 Installation Position ............................................6
6.3 When Installing observe...................................6
6.4 Impulse Tube Installation .................................6
6.5 Insulation................................................................6
6.6 Installation Scheme ............................................7
6.7 Assembly Drawings, Dimensions ..................8
7 Start-up .................................................. 10
7.1 Required Static Pressure, Pressure
Difference............................................................ 10
7.2 Leak and Pressure Tests...................................10
7.3 Filling the System ..............................................10
7.4 Start-up..................................................................10
7.5 Putting out of Operation ................................10
7.6 Adjustment of the Setpoint...........................11
7.7 Sealing ...................................................................11
7.8 Function Test.......................................................11
8 Trouble Shooting .................................. 12
8.1 Fault, Possible Cause, Remedy......................12
8.2 Diaphragm Break of the Controller SAVA. 12
9 Replacement of Valve, Actuator, Trim 13
9.1 Dismounting and Mounting Actuator and
Valve of the Valve Unit.....................................13
9.2 Replacement of Trim Valve VFG 21..............14
9.3 Dismounting, Mounting Actuator AVA,
SAVA........................................................................14
9.4 Replacement of Trim Valve AVA, SAVA ..... 14

Instructions PCVA, PCVSAA
© Danfoss | 2016.06 | 3
VI.JA.D2.5B
MAINTENANCE
FREE
1 Safety Notes
2 Definition of
Application
The controller is used for pressure control of
waterfor heating, district heating and cooling
systems.
The admissible medium temperatures depend
on the design and comprise 5 - 150 °C,
5 - 200 °C.
The technical data on the rating plates determine
the use.
To avoid injury of persons and
damages to the device, 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.

Instructions PCVA, PCVSAA
4 | © Danfoss | 2016.06 VI.JA.D2.5B
3.2 Mode of Operation
The control unit consists of the PCV-VFG21 valve
unit, installed in the main pipe, and the pressure
relief controller AVA or safety pressure relief
controller SAVA installed as pilot controller in the
bypass. In the bypass line, a throttle element is
installed in front of the pilot controllers.
As a pressure relief controller, the controller
keeps the pressure before the controller unit
in accordance with the preset setpoint on a
constant level.
As a safety pressure relief controller, the
controller guarantees that the pressure is not
exceeded before the control unit. If the controller
diaphragm is
damaged, the valve is closed via the second
diaphragm.The setpoint for the pressure is
adjusted by pre-stressing the setpoint spring of
the pilot controller.
The valve and the pilot valves are
pressurebalanced. The setpoint for the
pressure is adjusted by prestressing the
setpoint spring of the pilot controller. The
valve unit in the main pipe is opening on
rising pressure. The pilot controllers in the
bypass line are closing on rising pressure.
In case of small flow rates, the valve in the
main pipe remains closed through the
pressure spring in the actuator of the valve
unit. The pressure is exclusively controlled
by the pilot controller. If the flow rate in the
bypass is increased, the
pressure in the throttle element (Venturi
nozzle) decreases.
The reduced pressure acts through an
impulse tube upon the lower chamber
of the actuator of the valve unit. The
main valve is thus opened shockfree and
continuously.
If the flow rate is reduced, the pressure in
the throttle element raises and the main
valve closes. This sequential switching
guarantees an operation free of vibrations
and a small control deviation over a wide
positioning range.
3 Description
4 Technical Data Technical data, see rating plates and the PCV
data sheet.
3.1 Construction
Throttling valve
Valve Unit PCV-
VFG21
Throttling element
Pilot controller SAVA
T
hrottling valve
only DN150-25
0

Instructions PCVA, PCVSAA
© Danfoss | 2016.06 | 5
VI.JA.D2.5B
5 Scope of Delivery
SAVA
SAVA
DN 100-125
Assembly kit valve unit PCV-VFG 21 Pilot controller DN 25
AVA
AVA
Cu pipe Ø 6 × 1 × 1500 mm
Cu pipe Ø 10 × 1 × 3000 mm
Throttling element
DN 150-250
Assembly kit valve unit PCV-VFG 21 Pilot controller DN 40
Throttling element
Cu pipe Ø 6 × 1 × 1500 mm
Cu pipe Ø 10 × 1 × 3000 mm
DN 25
DN 40

Instructions PCVA, PCVSAA
6 | © Danfoss | 2016.06 VI.JA.D2.5B
pin only
weld
do NOT
weld
1
2
Depressurized system before
any assembly work !
CAUTION!
6 Assembly 6.1 Prior to Assembly:
• Clean pipeline system.
• Install strainer in front of the controller.
• Install shut-off units in front of and behind
the controller.
6.2 Installation Position
• Installation is only permitted in horizontal
pipelines with the actuators hanging in a
downward position.
6.3 When installing:
• Observe direction of flow.
• Design with welded ends:
• Loads on the valve body and the throttle
element by the pipes are not permitted.
6.4 Impulse Tube Installation
1. See installation scheme, section 6.6.
2. For CU pipes Ø 10 × 1, insert sockets 1on both
sides.
3. Care for correct position of the cutting rings 2.
6.5 Insulation
The diaphragm actuators must not be insulated
when insulating system parts.
4. Press impulse tube into the threaded fitting
up to its stop.
5. Tighten union nut, torque 40 Nm
6. Dismount again and check the position of the
cutting rings.

Instructions PCVA, PCVSAA
© Danfoss | 2016.06 | 7
VI.JA.D2.5B
T
hrottling valve
Throttling valve
(only by DN 150 - 250)
Throttling element
CU pipe Ø 10 × 1
Pilot controller SAVA
Do not install a
shut-o valve her.
But if you do so,
it is absolutely necessary
to secure against
unauthorized closing.
lay impulse tube during mounting
Valve unit
PCV - VFG 21
CU pipe Ø 10 × 1
T
hrottling valve
Throttling valve
(only by DN 150 - 250)
Throttling element
CU pipe Ø 10 × 1
Shut-o valve
Pilot controller AVA
CU pipe Ø 6 × 1
lay impulse tube during mounting
Valve unit
PCV - VFG 21
6 Assembly 6.6 Installation Scheme
Installation PCVA
Installation PCVSAA

Instructions PCVA, PCVSAA
8 | © Danfoss | 2016.06 VI.JA.D2.5B
-
Dismount impulse
tube
-
Unscrew threaded
fittings at the valve and
at the actuator
-
Close opening at the
valve with a stopper
(see assembly kit order
No. 003G1599)
Install impulse tubes
laterally because of dirt
Cu pipe Ø 6 × 1,
when laying,
use the assembly kit
order No. 003G1599
Cu pipe Ø 10 × 1
Lay when assembling.
D2
H1 H2
Valve unit PCV - VFG 21
DN 25: pipe Ø 33.7 × 3,2
Material: ST 35.8
(not part of the delivery)
Pilot controller
AVA
DN 25
SW 50 Throttling
element
L1
A
160
ca. 1000
75
159 244
these parts are not in the scope of delivery
6.7 Assembly Drawings, Dimensions
DN 100-125
6 Assembly

Instructions PCVA, PCVSAA
© Danfoss | 2016.06 | 9
VI.JA.D2.5B
- Dismount impulse tube
- Unscrew threaded
fittings at the valve and
at the actuator
- Close opening at the
valve with a stopper
(see assembly kit order
No. 003G1599)
Install impulse tubes
laterally because of dirt
Cu pipe Ø 6 × 1,
when laying,
use the assembly kit
order No. 003G1599
Cu pipe Ø 10 × 1
Lay when assembling.
D2
H1 H2
L1
these parts are not in the scope of delivery
DN 40: pipe Ø 48,3 × 3,2
Material: ST 35.8
(not part of the delivery)
290
D1
cca. 1200
200
these parts are not in the scope of delivery
A
B
Dimensions
Nominal diameter DN 100 125 150 200 250
L1
mm
350 400 480 600 730
H1 530 530 619 647 697
H2 -245 300 325
D2 263 380
D1 150 250 320 385 500
B200 210 310 336 412
A ≥ 290 320 350 410
DN 150-250
6 Assembly

Instructions PCVA, PCVSAA
10 | © Danfoss | 2016.06 VI.JA.D2.5B
76
3
4
2
5
9
8 10
6
7
7 Start-up 7.1 Required Static Pressure, Pressure
Difference
For a proper functioning, a minimum pressure
difference of p1 - p2 ≥ 0.5 bar is required.
The static pressure p1 in front of the controller
must not fall below 1.5 bar (excess pressure).
Nonobservance may lead to cavitation and
damages in the throttling element 1.
7.2 Leak and Pressure Tests
To avoid too high pressures at
the diaphragm actuators, the
following should be observed
prior to any pressure tests:
Actuator of valve unit:
The admissible operating excess pressure in the
actuator 2is 25 bar 1). For higher pressures, you
must:
• Remove the impulse tubes 3.
The admissible operating excess pressure in the
actuator 4is 25 bar 1). For higher pressures, you
must:
• Remove the impulse tubes 5 at the actuator
and close the connections with a stopper
• Prior to any leak or pressure test, the
instructions in section 7.3 must be complied
with.
1) Pre-condition: Same pressure on both sides of the diaphragm.
If the pressure load is one-sided, the (+)diaphragm chamber
may have an excess pressure of 1 bar in comparison to the (-)
diaphragm chamber.
7.3 Filling the System
Note:
The controller 6is closed when no pressure is
applied and only opens with a defined flow in the
bypass.
The pilot controllers 7are closing on rising pressure.
Procedure
1. Open shut-off valves 8that possibly exist in
the impulse tubes.
2. Slowly open shut-off units first in the return
flow 9and then in the supply flow 10.
7.4 Start-up
During starting-up the filled system, open the
units in the same sequence as described in
section 7.3.
7.5 Putting out of operation
When putting the system out of operation, first
close the shut-off units in the supply flow and
then those of the return flow.
p2 p1
1

Instructions PCVA, PCVSAA
© Danfoss | 2016.06 | 11
VI.JA.D2.5B
1
p2
2
P1
Regler PCVA
0 50% Vmax
3
4
SW 22
Turning to the left, reduces the setpoint.
7.6 Adjustment of the Setpoint
The setpoint of the pressure must be adjusted at
the pilot controller AVA 1. The setpoint range is
indicated on the rating plate of the actuator.
Procedure
1. Prior to the differential pressure adjustment,
start the system as described in section 7.4.
The differential pressure can also be adjusted
while the bypass 2 is opened.
2. Adjust the flow rate at a valve in flowdirection
after the controller PCVA.
Value approx. 50 % of the max. flow rate 3.
3. Adjustment of the pressure by turning the
setpoint adjuster 4.
Turning to the right, increases the setpoint.
7.7 Sealing
The setpoint adjusters may be sealed.
7.8 Function Test
Check the pressure of the running system with
different load situations.
If the pressure is exceeded in either direction,
adjust the pressure as described in section 7.6.
7 Start-up

Instructions PCVA, PCVSAA
12 | © Danfoss | 2016.06 VI.JA.D2.5B
1
3
2
4
8 Trouble Shooting 8.1 Fault, Possible Cause, Remedy
Fault Possible cause Remedy
Controller does not
hold the pressure on a
constant levell
Air in the actuators
1. Loosen impulse tube connections at the
actuators by approx. 1 rotation.
2. Deaerate, Caution hot water !
(move impulse tube until medium
penetrates).
3. Tighten impulse tube connections.
Impulse tubes or impulse tube connections are
dirty or damaged.
1. Remove impulse tube.
2. Clean impulse tubes and impulse tube
connections and check for free passage.
Pressure is too high
Pilot valve AVA (SAVA) does not close:
Valve seat or plug is dirty or damaged.
1. Remove impulse tube.
2. Dismount actutor and trim.
Procedure see section 9.4.
3. Clean seat and plug.
4. If damaged, replace trim or valve.
Valve VFG21 does not close:
Valve seat or plug is dirty or damaged.
1. Remove impulse tube.
2. Dismount actutor and trim 1).
Procedure, see section 9.2.
3. Clean seat and plug.
4. If damaged, replace trim or valve.
Rolling diaphragm in the actuator AVA (pilot
controller) is defective, i.e. valve AVA does not
close.
1. Remove impulse tube.
2. Replace actuator, see section 9.3.
Pressure is too low,
no or low flow
Rolling diaphragm in the actuator SAVA (pilot
controller) is defective, i.e. valve AVA is not closed
by the safety diaphragm. In this case, some water
penetrates at the threaded fitting of the actuator.
1. Remove impulse tube.
2. Replace actuator, see section 9.3.
Rolling diaphragm in the actuator of the valve
unit is defective, i.e. valve VFG21 does not open.
1. Remove impulse tube.
2. Loosen union nut SW 46 and remove
actuator, see also section 9.1.
3. Replace actuator.
1) The trim can be replaced by qualified personnel up to DN 125.
From DN 150 replacement should be carried out by the Danfoss service personnel.
8.2 Diaphragm Break of the Controller SAVA
If the control diaphragm 1 breaks, pressure is
developped in the two intermediate chambers 2.
This pressure acts upon the safety diaphragm 3
and causes the following:
- The valve is closed.
- The control function does not operate.
- A slight water leakage at the threaded joint 4
indicates a break of the diaphragm.
The controller must be replaced

Instructions PCVA, PCVSAA
© Danfoss | 2016.06 | 13
VI.JA.D2.5B
2
1
3
4
SW 46
5
grease
Cone
5
Tu rn
actuator
to the left
1
3
4
SW 46
The actuator weights approx.
20 kg. In addition, an internal
spring package is pre-stressed.
Secure against dropping down
before unscrewing.
9 Replacement of Valve,
Actuator, Trims
9.1 Dismounting and Mounting Actuator and
Valve of the Valve Unit
Note:
The springs 1in the actuator are pre-stressed.
Therefore, the actuator must be pushed upwards
to be dismounted. You need a second person to
do this.
Valve unit DN 100–125
Valve stem 3and the stem of the actuator 4are
not screwed to eachother.
Dismounting
1. Dismount impulse tubes.
2. Support actuator below or by a second
person as the springs 1 are pre-stressed.
3. Loosen union nut 2.
4. Remove actuator.
Prior to assembly check cone 5 !
1. Clean cone prior to mounting.
2. Check O rings for damages, in case of
damages, replace cone (see Spare Parts).
3. Grease cone with high-performance fitting
component: BARRIERTA L55/3 HV (see Spare
Parts).
Mounting
1. Place actuator at the valve and push upwards.
2. Screw on union nut 2.
3. Align actuator, observe position of impulse
tube connections.
4. Tighten union nut 1, max. torque 100 Nm.
Valve unit DN 150–250
The stem of the actuator 4is screwed into the
valve stem 3.
Dismounting
1. Dismount impulse tubes.
2. Completely loosen union nut 1.
The actuator hangs on the screwed-in stem 4.
3. Screw the stem of the actuators 4out of the
valve stem 3by turning the actuator to the
left.
Mounting
1. Place actuator at the valve and push upward
to press the spring package in the actuator
together (second person necessary).
2. Carefully turn actuator to the right.
By this, carefully screw in the stem of the
actuator into the valve stem to its stop.
3. Align actuator, observe position of the control
lines connections.
4. Tighten union nut 1, torque 100 Nm.
Then, return the actuator by
approx. 1 rotation (to the left)

Instructions PCVA, PCVSAA
14 | © Danfoss | 2016.06 VI.JA.D2.5B
2
2
1
2
3
1
4
5
6
9.3 Dismounting, Mounting
Actuator AVA, SAVA
9.4 Replacement of Trim Valve AVA, SAVA
Dismounting
1. Unscrew actuator (see above).
2. Unscrew trim 2.
DN 25: with pipe tongs, wrap gum strips
around the trim DN 40: with wrench SW 55
3. Pull out trim.
Mounting
Mounting is carried out in reverse order. Only
tighten with low torque, sealing is made with O
rings.
9 Replacement of Valve,
Actuator, Trims
AVA DN 25
AVA DN 40
Dismounting
1. Dismount impulse tubes.
2. Loosen union nut 1.
3. Remove actuator.
Mounting
1. Place actuator at the valve and align, observe
position of the impulse tube connections.
2. Screw on union nut 1and tighten,
torque 100 Nm.
9.2 Replacement of Trim Valve VFG2
The trim can be replaced by qualified personnel
up to DN 125. From DN 150 replacement should
be carried out by the Danfoss service personnel.
Removing the trim:
Valves DN 100–125
1. Dismount actuator 1
(see section 9.1).
2. Unscrew hexagon head cap screw 2.
3. Remove bonnet 3.
4. Take out trim 4.
Prior to installation:
Clean sealing surfaces 5and socket 6, grease
sealing surfaces with antiseize graphite
petroleum.
Installing the trim:
Mounitng is carried out in reverse order.
Torque hexagon head cap screws 2:
DN Torque Wrench
100-125 180 Nm SW 30

Instructions PCVA, PCVSAA
© Danfoss | 2016.06 | 15
VI.JA.D2.5B
Inhaltsverzeichnis 1 Sicherheitshinweise ............................ 16
2 Bestimmungsgemäße
Verwendung ........................................ 16
3 Beschreibung ....................................... 17
3.1 Aufbau ................................................................. 17
3.2 Wirkungsweise ................................................. 17
4 Technische Daten ................................ 17
5 Lieferumfang ....................................... 18
6 Montage................................................ 19
6.1 Vor der Montage beachten .......................... 19
6.2 Einbaulage ......................................................... 19
6.3 Beim Einbau beachten.................................... 19
6.4 Einbau Steuerleitung ...................................... 19
6.5 Isolierung ............................................................ 19
6.6 Einbauschemas ................................................. 20
6.7 Montagezeichnungen,
Abmessungen ................................................... 21
7 Inbetriebnahme .................................. 23
7.1 Erforderliche(r) statischer Druck,
Druckdifferenz ................................................. 23
7.2 Dichtheitsprüfung, Druckprüfung ........... 23
7.3 Füllung der Anlage ......................................... 23
7.4 Inbetriebnahme............................................... 23
7.5 Ausserbetriebnahme ..................................... 23
7.6 Sollwerteinstellung ......................................... 24
7.7 Plombierung ...................................................... 24
7.8 Funktionsprüfung ........................................... 24
8 Störungshinweise ................................ 25
8.1 Störungen, Ursachen, Maßnahmen.......... 25
8.2 Membranbruch beim Antrieb SAIA ......... 25
9 Austausch von Ventil, Antrieb,
Innengarnituren .................................. 26
9.1 Antrieb des Stellgeräts demontieren,
montieren ........................................................... 26
9.2 Austausch der Innengarnitur Ventil VFG 21
27
9.3 Demontage, Montage
Antrieb AVA, SAVA ............................................ 27
9.4 Austausch der Innengarnitur Ventil AVA,
SAVA ...................................................................... 27

Instructions PCVA, PCVSAA
16 | © Danfoss | 2016.06 VI.JA.D2.5B
MAINTENANCE
FREE
1 Sicherheitshinweise
2 Bestimmungsgemäße
Verwendung
Der Regler dient der Druckreduzierung und
der Absicherung gegen Drucküberschreitung
in Fernwärmeheizungs- und Kühlanlagen
für das Medium Wasser. Die zulässigen
Mediumstemperaturen sind je nach Ausführung
5 - 150 °C, 5 - 200 °C.
Die technischen Daten auf den Typenschildern
sind für die Verwendung maßgebend.
Um Verletzungen an Personen
und Schäden am Gerät zu
vermeiden, dies Anleitung
unbedingt beachten.
Montage, Inbetriebnahme und
Wartungsarbeiten dürfen nur von sachkundigen
und autorisierten Personen durchgeführt
werden.
Die Vorgaben des Anlagenherstellers und
Anlagenbetreibers sind zu beachten.

Instructions PCVA, PCVSAA
© Danfoss | 2016.06 | 17
VI.JA.D2.5B
Drosselventil
Stellgerät PCV-VFG21
Drosselelement DE
Pilotregler SAVA
Drosselventi
l
nur bei DN150-250
Bypass
Hauptleitung
3 Beschreibung 3.1 Aufbau
3.2 Wirkungsweise
Die Regeleinheit besteht aus dem in der
Hauptleitung eingebauten Stellgerät
PCV-VFG21 und dem Überströmregler AVA oder
Sicherheitsüberströmventil SAVA im Bypass. In
der Bypassleitung ist vor dem Pilotregler ein
Drosselement DE eingebaut.
Als Sicherheitsüberströmventil dient der Regler
der Absicherung gegen Drucküberschreitung.
Bei einer Beschädigung der Regelmembrane
wird das Ventil durch die zweite Membrane
geöffnet.
Die Sollwerteinstellung des Druckes erfolgt
über die Vorspannung der Sollwertfeder des
Pilotreglers.
Das Stellgerät in der Hauptleitung ist drucklos
geschlossen. Der Pilotregler in der Bypassleitung
ist drucklos geschlossen.
Bei geringen Volumenströmen bleibt das Ventil
in der Hauptleitung durch die Druckfeder
im Antrieb des Stellgerätes geschlossen. Die
Druckregelung erfolgt ausschließlich über den
Pilotregler.
Erhöht sich der Volumenstrom in der
Bypassleitung, so sinkt der Druck im
Drosselelement (Venturidüse).
Dieser abgesenkte Druck wirkt über eine
Steuerleitung auf die Unterkammer des Antriebs
des Stellgerätes. Das Hauptventil wird dadurch
stoßfrei und stetig geöffnet.
Reduziert sich der Volumenstrom, so steigt der
Druck im Drosselelement an und das Hauptventil
schließt.
Diese Folgeschaltung gewährleistet eine
schwingungsfreie Betriebsweise und eine
geringe Regelabweichung über einen großen
Stellbereich.
4 Technische Daten Technische Daten siehe Typenschilder und
Datenblatt PCV

Instructions PCVA, PCVSAA
18 | © Danfoss | 2016.06 VI.JA.D2.5B
5 Lieferumfang
SAVA
SAVA
DN 100-125
Bausatz Stellgerät PCV-VFG21 Pilotregler DN 25
AVA
AVA
Cu-Rohr Ø 6 × 1 × 1500 mm
Cu-Rohr Ø 10 x 1 × 3000 mm
Drosselelement
DN 150-250
Bausatz Stellgerät PCV-VFG21 Pilotregler DN 40
Drosselelement
Cu-Rohr Ø 6 × 1 × 1500 mm
Cu-Rohr Ø 10 × 1 × 3000 mm
DN 25
DN 40

Instructions PCVA, PCVSAA
© Danfoss | 2016.06 | 19
VI.JA.D2.5B
Anlage vor der Montage
drucklos machen!
Achtung!
nur Heften
Schweißen
nicht
Schweißen
1
2
6 Montage 6.1 Vor der Montage beachten
• Rohrleitungssystem reinigen
• Schmutzfänger vor dem Regler einbauen
• Absperrarmaturen vor und nach dem Regler
einbauen
6.2 Einbaulage, Einbauort
• Der Einbau ist nur in waagrechte
Rohrleitung
mit nach unten hängenden Antrieben
zulässig.
6.3 Beim Einbau beachten
• Durchflussrichtung beachten
• Ausführung mit Anschweißenden
• Belastung der Ventilgehäuse und des
Drosselelementes durch die Rohrleitungen
sind nicht zulässig.
6.4 Einbau Steuerleitung
1. Siehe Einbauschema Abschnitt 6.6
2. Bei den CU-Leitungen Ø 10 × 0,8 beidseitig
Einsteckhülsen 1einfügen.
3. Richtige Lage der Schneidringe 2beachten
6.5 Isolierung
Bei Isoliermaßnahmen dürfen die
Membranantriebe nicht isoliert werden.
4. Steuerleitung in die Verschraubung bis zum
Anschlag drücken.
5. Überwurfmutter anziehen, Anzugsmoment
40 Nm
6. Nochmals demontieren und und die Lage des
Schneidrings überprüfen

Instructions PCVA, PCVSAA
20 | © Danfoss | 2016.06 VI.JA.D2.5B
Drosselventi
l
Drosselventil
(nur bei DN 150 - 250)
Drosselelement
CU-Rohr Ø 10 × 1
Pilotregler SAVA
Hier sollte kein
Absperrventil eingebaut
werden, falls doch
unbedingt gegen
unbefugtes
Schließen sichern
Steuerleitungen bei Montage verlegen
Stellgerät
PCV - VFG 21
CU-RohrØ 10 × 1
Drosselventi
l
Drosselventil
(nur bei DN 150 - 250)
Drosselelement
CU-Rohr Ø 10 × 1
Absperrventil
Pilotregler AVA
CU-Rohr Ø 6 × 1
Steuerleitungen bei Montage
Stellgerät
PCV - VFG 21
6.6 Einbauschema
6 Montage
Hilfsgesteuerters Überströmregler PCVA
Hilfsgesteuertes Sicherheitsüberströmventil PCVSAA