Danfoss AFPA 2 / VFG 2 DN 15-250 User manual

© Danfoss | 2021.03 AQ372053646406en-000101 | 1
AFPA 2 / VFG 2 (21) DN 15-250
VFG 22 (221) DN 65-250
Operating Guide
ENGLISH AFPA 2 / VFG 2 (21) DN 15-250, VFG 22 (221) DN 65-250 www.danfoss.com Page 7
This document is included in the scope of delivery. The latest document version is available on virtus.danfoss.com

AQ372053646406en-0001012 | © Danfoss | 2021.03
AFPA 2 / VFG 2 (21) DN 15-250, VFG 22 (221) DN 65-250
Tmax ≤ 150 °C
VFG 22 (221)
VFG 2 (21) DN 15-50
①
Tmax > 150 °C
②
MAINTENANCE
FREE 3 mm SW13, 19, 36, 46
AF (2×)**
DN 15-50
Tmax = 150 °C
Bellows
VFG2, VFG21
AFPA 2
adapter 003G1780*
Piston
VFG22, VFG221
DN 65-250
Tmax = 150 °C
AFPA 2
AF (2×)**
1×
V1, V2 (630 cm2)
Bellows
VFG2
DN 15-250
Tmax = 200 °C
adapter 003G1780*
AFPA 2
AF (2×)**
❷
❶

© Danfoss | 2021.03 | 3AQ372053646406en-000101
AFPA 2 / VFG 2 (21) DN 15-250, VFG 22 (221) DN 65-250
③
②
①SW46
Max 100-120 Nm
③
②
~ 30
turns
Pull out
④
⑤
⑦
Hold
Fix
Release
for ½ turn
⑥
Turn
till
and
AFPA 2/VFG 22(221) DN 65-250
①
FV
+−
❺
❸
❹

AQ372053646406en-0001014 | © Danfoss | 2021.03
AFPA 2 / VFG 2 (21) DN 15-250, VFG 22 (221) DN 65-250
①
②
①
T < 120 °C
T > 120 °C
⑤
③
①
②
④
⑧
T > 150 °C
⑥
⑦
SW 19
40 Nm
SW 13
SW 19
40 Nm
①
②
②
①
②
①
~30 Turns
~30
Turns
AFPA 2/VFG 22(221) DN 65-250
①
G ⁄
AF ⑤
③
④
③
❿
❾
❼❻
❽

© Danfoss | 2021.03 | 5AQ372053646406en-000101
AFPA 2 / VFG 2 (21) DN 15-250, VFG 22 (221) DN 65-250
⑤
EN -GJL-250
(GG-25)
PN 16
PN 25
EN-GJS-400
(GGG-40.3)
PN 40
EN-GP-240-GH
(GS-C 25)
①
①∆p = 1-3 bar
Type: AFP 2
Code Nr.: 003G5650
∆p: 1-3 bar,
Tmax: 150 °C
Area (cm2): 80
①
②
Turn
till
end
Hold
Fix
Release
for ½ turn
⑤
④
Pull out
③
⑥
SW46
Max 100-120 Nm
~ 30
turns
⑤
③
⑥
②③
④
②
③
①
④
②
③
①
④
⓫
⓬
⓭

AQ372053646406en-0001016 | © Danfoss | 2021.03
AFPA 2 / VFG 2 (21) DN 15-250, VFG 22 (221) DN 65-250
298
Ø 140
Seal pot V2
78
110
SW 22
ø60
Shut off valveCompression fitting
SW19
40
Ø10
G⁄
240
Ø 89
Seal pot V1
L
B
H
VFG 22(221) DN 65-250
HV
AFPA 2 Actuator
ØA
HA
⑧
⑨
2x
⑦
⑥
SW36
SW36
⓮
DN
15
20
25
32
40
50
L
mm
130 150 160 180 200 230
B213 213 239 239 241 241
H267 267 304 304 323 323
Size
(cm
2
)
ØA HAWeight
(kg)
mm
32 175 512 9
80 175 512 9
160 228 512 10
320 295 512 15
630 300 635 36
Total installation height of the controller (VFG 22(1) valve
+ AFPA 2 pressure actuator) is sum of HVand HA
DN L B H HV
Weight
PN 16 PN 25 PN 40
mm
kg
65 290 220 345 285 24 25 26
80 310 220 345 285 29 30 32
100 350 260 405 345 47 48 50
125 400 260 425 365 60 62 60
150 480 325 515 455 105 108 130
200 600 360 605 545 204 210 260
250 730 420 675 615 343 353 375
L
H
B
VFG 2 (21) DN 15-50
Adapter
003G1780
⓭

© Danfoss | 2021.03 | 7AQ372053646406en-000101
AFPA 2 / VFG 2 (21) DN 15-250, VFG 22 (221) DN 65-250
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 instructions
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 used for differential pressure
control in bypass lines of water and water glycol
mixtures for heating, district heating and cooling
systems.
The technical data on the label plates determine
the use.
Scope of Delivery ❶
*) adapter 003G1780, accessory sold separately,
**) Impulse tube AF, accessory sold separately
Assembly
Admissible Installation Positions ❷
①media temperatures up to 150 °C:
Can be installed in any position.
②media temperatures > 150 °C.
Installation permitted only in horizontal
pipelines with the actuator oriented
downwards.
Installation Location and Installation
Scheme ❸
Bypass installation
The valve is closed without pressure
and is opening on rising differential
pressure ①.
Valve Installation ❹
1. Install strainer ①before the controller.
2. Rinse system prior to installing the valve.
3. Observe flow direction ②on valve body.
Flanges ③in the pipeline must be in
parallel position and sealing surfaces
must be clean and without any damage.
4. Install valve.
5. Tighten screws crosswise in 3 steps up to the
max. torque.
Actuator Installation ❺
The actuator stem must be screwed into
the valve stem. Spring on the pressure
actuator is factory adjusted (stressed).
For proper installation spring has to be
released (unstressed) first.
1. Remove the spindle protection cup and
release the valve spindle by removing the
nut, washer and cardboard tube.
2. Align the actuator stem with the valve stem,
connect both stems and turn gently the
whole pressure actuator clockwise with both
hands, until the stems are fully connected
(valve stem fully screwed into the actuator
stem).
3. Release the uninon nut by pulling out the
blocking spring.
4. Tight the union nut by hand or with wrench
key using minimal force
5. Release the pressure actuator by turning it
counter clockwise for approximately half a
turn.
6. Observe the position of impulse tubes
connection to the valve and align the
actuator accordingly.
7. Hold the actuator in the position and tight
the union nut to the valve with 100- 120 Nm
torque.
Impulse Tube mounting ❻
• Which impulse tubes to use?
The impulse tube set AF (2×) ❻① can be
used: Order No.: 003G1391
or use the following pipes:
Steel /
Stainless steel Ø 10×1 ISO 1127 D3/T3
Copper Ø 10×1 Cu-DHP R200
EN124 49
• The impulse tube ③ can be connected
directly to the valve ④
or
to the pipeline ⑤.
Connection to the valve ❼
1. Remove plug ①at the valve.
2. Screw in threaded joint G 1/4 ②with copper
seal, Torque 40 Nm.
- or -
Connection to the Pipeline ❽①
No connection downwards/upwards ②, could
bring dirt/air into an impulse tube.
1. Cut pipe in rectangular sections ③and
deburr.
2. For copper pipe:
insert sockets ④on both sides.
3. Verify the correct position of the cutting
ring ⑤.
4. Press impulse tube ⑥into the threaded joint
up to its stop.
5. Tighten union nut ⑦Torque 40 Nm.
When installing seal pots ❽⑧, please
observe the Installation Instructions
for the seal pots.
Insulation ❾
For media temperatures up to 120 °C the
pressure actuator may be insulated ①.
Dismounting ❿
Danger
Danger of injury by hot water
Prior to dismounting depressurize system or
use shut off valves on the impulse tubes! ①
Carry out dismounting in following steps: ②
1. Fasten pressure actuator with the safety
bands to the fixed points in surroundings
2. Before releasing the actuator, fully release
the union nut
3. Hold the pressure actuator with both
hands, and release it by turning it counter
clockwise ~30 turns. During turning, control
the actuator weight all the time to prevent
unexpected fall of detached actuator.
4. Carefully remove the actuator from the valve.
Before installing actuator back to the valve,
setting spring must be fully released again.
Leak and Pressure Test ⓫
Observemax.
permitted pressure, see below.
The pressure behind the valve ②must not
exceed the pressure before the valve ①.
Observe nominal pressure ⑤of the valve.
Caution:
The valve is closed without pressure and it
opens on rising pressure before the valve.
Prior to pressure tests, it is absolutely necessary
to remove the impulse tube at the valve ④.
Close connections with plugs G ¼ ISO 228.
Max. pressure [bar] with connected impulse tube:
AFPA 2
cm232 80 160 320 640
bar 16 52.5 1.3 0.35
Max. test pressure with disconnected impulse
tube must not exceed the plant testing pressure
and must always be lower than 1.5 × PN.
Non-compliance may cause damages at the
controller ③.
Filling the System, Start-up ⓬
The pressure ②behind the valve
must not exceed the pressure ①before
the valve.
Non-compliance may cause damages at the
controller ③.
1. Open shut-off devices that are possibly
available at the impulse tubes ④.
2. Slowly open valves in the system.
3. Slowly open shut-off device ⑤.
4. Slowly open shut-off device ⑥.
Putting out of Operation
1. Slowly close shut-off device ⑤.
2. Slowly close shut-off device ⑥.
Setpoint Adjustment ⓭
1. Set-point range see rating plate ①
2. Start-up of system, see section ⓬.
3. Start pump ②
4. Observe pressure indicator ③
5. Slightly close fitting ④behind the pump (in
flow direction) so that the pressure ③ is rising.
6. Adjustment of the differential pressure over
the valve:
• Turning to the right ⑥reduces the set-point
(unstressing the spring - tension spring)
• Turning to the left ⑦increases the set-point
(stressing the spring)
7. If the required pressure ③cannot be set,
further close the fitting ④.
8. The set-point adjuster ⑧may be sealed.
9. Release the not yet used pointer ⑨, move it
to the set position and fix it with the screw to
mark setting position
Dimensions ⓮
Flanges: connection dimensions acc. to
DIN 2501, seal form C

73695700 / AQ372053646406en-0001018 | © Danfoss | DHS-SDBT/SI | 2021.03
AFPA 2 / VFG 2 (21) DN 15-250, VFG 22 (221) DN 65-250