Georg Fischer EA20 User Manual
Instruction Manual
Electrical Actuator Unit Type EA 20
GEORGE FISCHER …
The technical data are not
binding. They are not warranted characteristics and are
subject to change. Please
consult our General Conditions of Supply.
46
GEORGE FISCHER …
Table of Contents
Page
1. General 48
2. Design of the actuator 49
2.1 Mains voltage selection 50
2.2 Wiring diagram of the standard version 51
3. Design of the actuated valve 52
3.1 Ball valve Type @@5 (multi port mixing valve/L-port) 52
3.2 Ball valve Type @@@ – @@3 53
4. Installation of the actuator 54
5. Specifications 55
5.1 Actuator unit 55
5.2 Block diagram 56
5.3 Dimensions 56
6. Assembly and wiring of the modular components 57
6.1 Intermediate position 58
6.2 Mechanical limit switch 59
6.3 Inductive limit switch 60
6.4 Potentiometer 61
6.5 Operating time adjustment module (Vario) 62
6.6 Heating element 63
7. Troubleshooting guide 64
8. Individual Parts/Spare Parts 65
GEORGE FISCHER …
47
1. Introduction
This instruction manual contains all the information
regarding design, installation and start-up procedure for the electrical actuator unit Type EA 20.
Warnings:
≠ Do not work on this unit before disconnecting it
from the mains!
≠ The actuator is factory preset to a mains volta-
ge of 230 V AC. By all means refer to Item 2.1.
≠ Electric actuators do not have a safety position.
In case of a mains breakdown, the actuator
resp. the valve remains in its actual position.
≠ Any work done on the actuator may only be
carried out by authorized and trained personnel.
≠ These products are according to the Machine
Guidelines 98/37/EG (ancient 89/392/EWG),
not regarded as machines; they are, however,
built into installations which are regarded as
machines.
Note
We distinctly emphasize that operation is
prohibited until it has been confirmed that the
machine (plant) into which the products have
been built corresponds to the conditions of the
EC Machine Guidelines 98/37/EG (ancient
89/392/EWG).
48
GEORGE FISCHER …
2. Design of the actuator
The standard version of the electrical actuator
EA 20 consists of the following elements: spurwheel gear, DC motor, power supply board as
well as components for limit positioning. For special applications, the actuator can be equipped with
additional modular components (see Item 6).
5
4
3
2
1 Limit Switch S1 und S2
2 Spindle for additional
switching cams
3 Mounting space for addi-
tional limit switches
4 Mounting space for po-
tentiometer and/or operating time adjustment
module
5 DC motor
6 Visual position indicator
valve closes
왔
valve opens
왔
61
1 Spur-wheel gear
2 Unit plug
3 Connector terminal strip
4
3
for external connections
max. 1,5 mm
4 Electrical supply unit
2
GEORGE FISCHER …
1
2
49
230 V, 50–60 Hz
왗왘
The actuator is factory preset
for 230 V 앑
@@5 V, 50–60 Hz
Selecting @@5 V 앑
can be done by changing
the corresponding jumpers as
shown in the diagram
2.1 Mains Voltage Selection
왗왘
50
Do not work unit when under voltage!
GEORGE FISCHER …
2.2 Wiring Diagram
Standard Version
Position indicator
3/2-way
Multiport
mixing valve
A
BBB
B–C
A–C
L-port
A
C
2/2-way
A
C
B closed
C open
As a component the
electrical actuator unit
EA 20 is delivered in
position <open> (A–B)
M
black
3
white
M2
F E D
red
2
brown
C
654321
open
S1
1
green
M1
S1
S2
green
1
close
S2
1
2
green
red
Connect earth
conductor to
transformer
green/
yellow
2
red
Do not use S1 and S2 for electric position
feedback.
GEORGE FISCHER …
«closed»
B
«open»
A
DC AC
+L1
–N
PE
51
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