code 80331F / Edition 0.7 - 05-2014
OPERATING INSTRUCTIONS
AND WARNINGS
TABLE OF CONTENTS
Page
Graphic symbols used 1
1 Preliminary instructions 2
General description 2
2 Installation and Connection 3
2.1 Overall dimensions and mounting dimensions 5
2.2 Description of base 6
2.3 Installation examples 7
2.4 3-phase connection 7
3 Electrical connections 8
3.1 Wire terminal table 8
3.2 Operation of Geflex Master relay 8
3.3 Power connections / Inputs /
Outputs / Power supply 9
3.4 Serial connections 10
3.5 Connection of
Master + Slave modules 11
3.6 Three-phase connection
with neutral 11
3.7 Three-phase connection
without neutral 11
Page
4 Installation of “MODBUS” serial network 12
4.1 “AUTOBAUD” sequence 13
4.2 “AUTONODE” sequence 13
4.3 “CHANGE” sequence 14
4.4 Software on/off 14
5 Alarms 15
5.1 HB alarm function 15
5.2 HOLD function 15
6 Control actions 16
7 Manual Tuning 16
8 Multiset function, Set Gradient 16
9 Self-tuning 17
10 Auto-tuning 17
11 Controls 18
11.1 Heating/Cooling control
with relative gain 18
12 Dissipation curves 18
13 Technical specifications 19
14 Technical-Commercial information 20
14.1 Accessories 21
To distinguish between the type and importance of the
information provided in these instructions for use, graphic
symbols have been used as a reference to make interpreting
the information clearer.
Indicates the contents of the various manual sections, the general
warnings, notes, and other points to which the reader’s attention
should be drawn
Indicates a particularly delicate situation that could affect
the safety and correct working operation of the controller,
or a rule that must be strictly observed to avoid dangerous
situations
Indicates a condition of risk for the safety of the user, due to the
presence of dangerous voltages at the points shown
Indicates a suggestion based on the experience of the
GEFRAN Technical Staff, which could prove especially
useful under given circumstances
Indicates a reference to Detailed Technical
Documents available on the GEFRAN web site www.
gefran.com
GRAPHIC SYMBOLS USED
GEFLEX
MODULAR POWER CONTROLLER FOR TEMPERATURE CONTROLLED ZONES
1
80331F_MHW_GFX-25/120A_05-2014_ENG
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