AJAX PVG WW, Operating And Maintenance Manual

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MXG461…U, MXF461…U
M
odulating Control Valv
es
T
e
chnical Instructions
With Magnetic
Actuators
Docu
m
ent Number CA1N4455E-P25
June 14, 2006
Siemens Buil
di
ng T
e
chnol
ogi
es, Inc.
Page 7
Wiring Terminals
W
ARN
IN
G:
Earth gro
und
must be
conn
ected to the p
ipe wo
rk.
1 2 3 4 5 6
G0 G Y X YF
~
Sval0011R1
YM
24 Vac 24 Vac Control signal input Control signal ref
erence voltage
0 to 10 Vdc stroke signal output (p
osition feedback)
Override cont
rol
Figure 6. Terminal La
y
o
ut for Fo
ur-w
ir
e
Conn
ections.
Wiring Dia
gram
+
1 2 3 4 5 6
U
2-10 VDC 0-10 VDC
24 V
A
C
4-20 mA
24
VA
C
G0 G Y YM X YF
MX...461...
1 2 3 4 5 6
24
VA
C
G0 G Y YM X YF
MX...461...
±
Sval00228R1
Figure 7. Co
nnection to
Con
troller
w
ith Four
-w
ire
Outpu
t.
U = Indication of valve
position (only
where required). 0 to 10 Vdc
ĺ
0 to 100%
volumetric flow SSEN0093R1
TWISTED P
AIRS
If the cable
s for the 24 Vac su
pply and
the cont
rol si
gnal 0 to 10
Vdc
(2 to 10 Vdc,
4 to 20 mA are routed
separately, twisted pairs are not requi
red for the
24 Vac
cable
).
T
e
chnical Instructions
MXG4
61…U,
MX
F461…U M
odulating Control Valv
es
Docum
ent Number CA1N4455E-P25
w
it
h
Magnetic
Actuators
June 14, 2006 Page 8
Siemens Buil
di
ng T
e
chnol
ogi
es, Inc.
Forced Con
trol
Featur
e
(Input Terminal YF/6)
0 Vac
(Bridge G0 –
YF)
24 Vac (B
ridg
e G – YF)
1 to 9 Vdc at F
Control path
A
ĺ
AB closed
Control path
A
ĺ
AB open
Continuously variable low li
mit control 10% to 90% volume
flow (the higher value YF of Y takes priority). This function
is available
with valves with a manufacturing
date of 990701 or later.
Configuration S
w
itches
Sw
it
c
h
1 Characte
ri
stic
2 Control
sig
nal
3 Volts or m
A
Off
Linea
r
0 to 10 Vdc*
0(2) to 10 Vdc*
On
Equal percentage*
2 to 10 Vdc or 4 to 20 mA
4 to 30 mA
* Factory setting: equal percentage valve chara
cteri
st
ic, 0 to 10 Vdc control
signal.
70
03
8c
A
B
Figure 8. DIP S
w
it
ch
es.
Calibration
The MX…461…P magnetic valves are factory
-calibra
ted at 0% and 100% stroke. When
commi
ssioni
ng the valves (especi
ally under
extrem
e usa
ge conditi
ons) there may still
be som
e leakage via control path A
ĺ
AB with a 0% stroke control signal (0 Vdc, 4 mA
or 2 Vdc). In this case, the valve can be
recalibrated as follows (see Figure 8):
x
Use a pin or
paper clip to
push the button
in opening (A) in the terminal housing.
x
Duri
ng calibration, the LED light (B) in t
he electroni
cs modul
e will
flash green for
approximatel
y 10 seconds. The valve will be briefly cl
osed and full
y opened.
Application Example
CAUTIO
N:
This valve is
suitabl
e for st
raight
-thro
ugh norm
ally cl
ose
d or three
-way
appli
cations only, and should only be inst
alled in a mixing arrangem
ent.
B
A
B
AB
B
A
A
AB
B
A
C
D
E
AB
10 (min. 20 in) x DN
AB
B
A
A
AB
Sval0014R1
A
Mixing
circuit
B
Mixing circuit
with bypass (underfloor heating)
C Injection
circu
it
D Diverting
circuit
E
Injection
circuit with straight
-through valv
e
Figure 9. H
y
draulic Circuits.