Installation and user manual
UNICOM 300 N531
DDN5006GHEN/04-2021/rev.B1
8
4 Installation
The housing of UNICOM 300 has a protection class IP65 in accordance with EN60529. UNICOM 300
may be placed in the open air.
First read Explosion safety instructions (Ex) of document
DDN5802CVML
EU
Declaration of Conformity and Safety instructions UNICOM 300 N531 before
proceeding.
Electrostatic discharges (ESD) can cause damage to internal electrical
components if you do not take precautions. ESD is caused by static
electricity and the damage caused is usually permanent.
4.1 Installation
See
DDN5002MHML
installation manual for installation/assembly options and installation instructions.
This manual can be downloaded from
www.wigersma-sikkema.com
.
It is not necessary to open the UNICOM 300 to mount the mounting brackets to a gas meter or to the
wall.
4.2 Dealing with mains voltage
First read the provisions for explosion protection, see
chapter 2 Explosion protection instructions (Ex)
or
the
DDN5802CVML
EU Declaration of Conformity and Safety instructions UNICOM 300 N531.
Depending on the function and the configuration of UNICOM 300, the inputs are already configured
from factory and it is possible that the corresponding cable (s) is (are) mounted.
The back-up battery is
not
connected! This has not been done for reasons of battery life.
Connect the back-up battery only after the mains power has been connected.
Disconnect the mains voltage before carrying out any maintenance.
Only connect the mains voltage if all cables are connected.
If the connections are changed, check that the mains voltage is not present and that it is ensured
that the mains voltage cannot be switched on.
Always place the Ex-protection cap (fig.1, 2 or fig. 6, 7) over the mains connection.
4.3 Handling DC voltage
Mains operated UNICOM 300 can also be powered by 24V (15 - 32VDC). The 24V connection is
recognizable by the 24V label, and this label must be removed when connecting the 24V. Make
sure that the + and - are connected correctly. Incorrect connections will cause the fuse to blow.
The device must then be sent to W&S for repair. See also (4) in figure 6.
4.4 Powering UNIGAS 300 with mains operated UNICOM 300
To connect the external power supply for the UNIGAS 300, + and - must be correctly connected according
to cable specification, see appendix 3C.
If an old UNILOG 300 power supply cable is available at the time of installation, it can be used if all
conditions described in Chapter 4 and Appendix 3C are met.
