TM_s-MEXT_ME28relC_00_12_19_EN
Technical manual
TRANSLATION OF THE ORIGINAL INSTRUCTIONS
7
1
INTRODUCTION
1.1
SAFETY REQUIREMENTS
The software described in this document was designed for use with precision air-
conditioning units such as “Close Control” units (for data processing centres).
The software was designed for use on the following control systems:
•
control board EV
–
Small with user terminals and PGD1 graphic interface
ATTENTION
The EV controller software is protected by a digital signature.
This means that it can only work on boards supplied by MEHITS and not on boards purchased from other dealers.
1.2
GENERAL FUNCTIONS
Below is a non-exhaustive list of the functions of the application:
•
Adjustment of room temperature and humidity according to the setpoints entered using the user terminal.
•
Complete visualisation of the operating status of the unit.
•
Possibility of setting the adjustment parameters, both the
fundamental ones (entering the “User” password) and the more advanced ones (entering the “Service”
and “Factory” password).
•
Possibility of manually managing (manual override) all the unit devices.
•
Management and acoustic and visual signalling (visual only by default) of faults (alarms), events and maintenance, with memorisation up to 200 events.
•
Possibility of serial control and management.
•
Possibility of operating up to 10 units connected together in a local network LAN, also with one or two time-switched backup units.
1.3
UNITS CONTROLLED
The software in question can be installed on the following version of air-conditioning units.
Type and diagram
Description
Unit code
Features
SPLIT TYPE
These direct expansion units use
refrigerant for the transfer of heat. The air
in the room is, therefore, treated in the
evaporating coil where the refrigerant
flows.
The condensation heat is dumped by a Mr.
Slim external air condensing unit with
inverter compressor.
s-MEXT
•
Direct expansion coil to use in combination with
the Mr. Slim condensing unit
•
EC fans
