Installation Guide
AHP, DN 15-50 (PN 16)
DN 15-40 DN 50
∆p = 0.2-0.4 bar ∆p = 0.2-0.4 bar
∆p = 0.35-0.75 bar
∆p = 0.6-1.0 bar
ENGLISH
Differential pressure controller AHP (DN 15-50) www.danfoss.com Page 4
Danfoss Heating VI.LR.H2.02 DH-SMT/SI
1
Installation Guide AHP (DN 15-50)
❶
PN 16
working area
PN 16
workin g area
DN 15-40
CuZn36Pb2As (DZR)
DN 50
EN-GJL-250 (GG-25)
❷
①
②
1)
∆p setting range (bar) bar
0.2-0.4 0.30
0.35-0.75 0.60
0.6-1.0 0.80
DN mm
15 2.5
20 3
25 4
32 5
40 5
50 5
③
DN 15-40 DN 50
n
(turns)
n = 360
0.2-0.4 0.2-0.4 0.35- 0.75 0.6-1.00
bar
0 0.40 0.75 1.00
1 0.39 0.73 0.98
2 0.38 0.71 0.96
3 0.37 0.69 0.94
4 0.36 0.67 0.92
5 0.40 0.35 0.65 0.90
6 0.39 0.34 0.63 0.88
7 0.38 0.33 0.61 0.86
8 0.37 0.32 0.59 0.84
9 0.36 0.31 0.57 0.82
10 0. 35 0.30 0.55 0.80
11 0.34 0.29 0.53 0.78
12 0.33 0.28 0.51 0.76
13 0. 32 0.27 0.49 0.74
14 0.31 0.26 0.47 0.72
15 0.30 0.25 0.45 0.70
16 0.29 0.24 0.43 0.68
17 0.28 0.23 0.41 0.66
18 0. 27 0.22 0.39 0.64
19 0.26 0.21 0.37 0.62
20 0.25 0.20 0.35 0.60
21 0. 24
22 0.23
23 0.22
24 0.21
25 0.20
O
2
DH-SMT/SI VI.LR.H2.02 Danfoss Heating
Installation Guide AHP (DN 15-50)
❸
A
①
A
A
②
FV
❹
D
a
L
1
L
2
L
3
DN 15-40
p L1L2L3H1H2D
DN
(bar) mm
15
65 120 139 90.2 13.2 61 G ¾ A
20 75 136 159 111.2 16.6 76.5 G 1 A
0.2-0.4
25 85 155 169 141 21 98 G 1¼ A
32 95 172 179 175.2 23.9
40 100 206 184 179.7 26.9
a
122.5
122.5
1
H
2
H
a
ISO 228/1
G 1¾ A
G 2 A
DN
D
1
D
1
H
a
2
H
L
1
L
2
L
3
DN 50
p L1L2L3H1H2D D
a
1
(bar) mm ISO 228/1
0.2-0.4
0.35-0.75
50
130 244 234
0.6-1.0
232
61 55 133 G 2⁄
273
Danfoss Heating VI.LR.H2.02 DH-SMT/SI
33
Installation Guide AHP (DN 15-50)
ENGLISH
Safety notes
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 only be performed
by qualified and authorized personnel.
Disposal instruction
This product should be
dismantled and its
components sorted, if
possible, in various groups
before recycling or disposal.
Always follow the local disposal
regulations.
Installation ❸
AHP must be installed in the return pipe.
The flow must be in the direction of the
arrow on the valve body-fig ①.
It is recommended to install filter ② in
the system supply pipe. The impulse tube
must be flushed through before being
fitted on the + connection of the AHP
controller.
Setting/adjustment ➋
The AHP controllers are sold in different
∆p setting ranges. The controllers are
factory–set to a defined value as described
on Factory presseting table on fig ②. The
setting on AHP can be changed by turning
the setting spindle ①. Use the following
procedure to set the desired differential
pressure:
- turning the spindle clockwise increases
the setting
- turning it counter clockwise reduces the
setting.
If the setting is not known, turn the spindle
fully clockwise. With this the setting on
AHP is at maximum value within setting
range. Now turn the spindle a number
of times (n) as described in ③ until the
required differential pressure setting is
obtained.
Note: Do not turn the spindle more than
20/40 turns as it will become disengaged.
Starting
During system start please secure that
there is the same static pressure on both
sides or higher pressure on upper side of
the membrane (+ connection).
AHP controller must in addition be
installed as determined by installation
conditions. After the system has been in
use for some time, the connections with
external threads should be tightened once
again to minimize the risk for leakage.
Pressure testing
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. During this
operation (closing or opening the valves)
please make sure that there is never lower
pressure on upper side of the membrane.
If this instructions are ignored, the
diaphragm might be damaged.
Dimensions ❹
73695480/VI.LR.H2.02
Produced by Danfoss A/S © 03/2011
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