AERMEC NRL 028-075, Техническое руководство, Страница: 11 / 40

11
NRL 028-075 60Hz
EN
ELECTRONIC REGULATION
Microprocessor board
Composed of management & control board
and display board.
Functions performed
− adjustment of evaporator inlet water temperature with thermostatic control
up to 6 steps and proportional control over the speed of the fans (with DCPX
accessory)
− compressor start up delay
− rotation sequence compressors;
− compressor operating hours count.
−
start/stop;
− reset;
− permanent memory of alarms;
− autostart after power failure.
− multilingual messaging;
−
working with local or remote control.
(accessory PGD1)
Machine state display
− ON/OFF compressors.
− alarms summary
Alarm Management
− high pressure.
− flow switch.
−
low pressure.
− antifreeze.
−
overload compressors;
− overhead fans;
− overload pumps.
Viewing of the following parameters
− water inlet temperature;
− water outlet temperature;
− delta T;
− high pressure;
− low pressure;
− hold time to reboot;
−
alarms display
Set settings
• a) without password:
cold set;
total differential;
• b) with password:
antifreeze set;
time exclusion low pressure;
display language;
access code.
For more information refer to the user manual.
5.6. ELECTRICAL PANEL CONTROL AND
POWER
Electric control board in compliance with Standards
EN 60204-1/IEC 204-1, complete with:
- transformer for the control circuit,
- door lock main isolating switch,
- fuses and contactors for compressors and fans,
- clamps for remote panel
- spring type control circuit terminal board,
- outdoor electric board with double door and
gaskets,
- electronic controller,
- evaporator pump and recovery pump control con-
sent relay (for versions without pump units only),
- All numbered cables.
DOOR-LOCK ISOLATING SWITCH
The switchboard can be accessed by removing the
voltage via the lever on the same switchboard. This
lever can be locked using one or more padlocks during
maintenance interventions in order to prevent the
machine being made live accidentally.
CONTROL KEYBOARD
Allows complete control of the appliance. For a more
in-depth description please refer to the user manual.
ATTENTION
In heat pump models the desuperheater
must be shut-off in heat pump mode, or the
warranty will be come void.