EVCO EVF818P9 - Manual (Page 6)

EVCO S.p.A. EVF818 | Installer manual ver. 1.0 | Code 144F818E104
page 6 of 76
1 INTRODUCTION
1.1 Introduction
EVF818 is a digital controller studied to manage temperature-controlled blast chillers, which can be mechanically and
aesthetically integrated into the unit.
The controller is fitted with:
- clock
- signal buzzer and alarm
- 6 analogue inputs (cabinet probe, “multipoint” needle probe with up to three sensors, evaporator probe and
condenser probe) for PTC/NTC probes
- 4 digital inputs (door micro switch, high pressure, low pressure and compressor circuit breaker protection)
- 1 PWM analogue output for management of the evaporator fan
- 8 digital outputs (electromechanical relays), 1 x 30 A res. @ 250 VAC for compressor management, 1 x 16 A
res. @ 250 VAC for management of needle probe heating, 6 x 8 A res. @ 250 VAC for management of
defrosting, evaporator fan, condenser fan, door heating elements, of a seventh utility that can be set for the
cabinet light or UV light and an eighth utility that can be configured for pump down valve or alarm output.
- TTL type serial port
- RS-48 serial port with MODBUS communication protocol.
The device can manage both temperature-controlled and time-controlled and hard and soft blast chilling and storage
cycles and deep freezing and storage cycles, with intensity management via the use of a PWM analogue output and
phase cut speed regulator for EVDFAN1 single phase fans.
Every operating cycle can be preceded by pre-cooling. The temperature-controlled cycles are also preceded by a test
for checking the correct connection of the needle probe, with "multipoint" probes management (up to three sensors).
The device is available in “split” execution (user interface + control module).
The user interface is behind a Plexiglas sheet and is made up from a custom 3 + 4 + 1 digit display (with function
icons) and 10 capacitive touch-keys; installation is envisioned on rear of panel with studs.
The control module is without cover and installation is envisioned on flat surface with spacers.
The "programs" function can be used to memorise some settings in a program and start an operating cycle with the
settings it has memorised.
Via the "HACCP" function, up to 9 events can be memorised for each of the 3 HACCP alarms (temperature-controlled
blast chilling or deep freezing not concluded within the maximum duration alarm, maximum temperature during
storage alarm and power cut during storage alarm); the critical value, date and time at which the alarm occurred and
the duration can be memorised for each HACCP alarm.
The configuration parameters can be uploaded and downloaded using the EVKEY programming key (to be ordered
separately).
It is also finally possible to connect the controller to the Parameters Manager set-up software system, to the
monitoring and surveillance system of the RICS plants, to the data recording device and to download the recorded
data (via USB) EVUSBREC01 or to the print module PM 100A X9S001.
The following are indicated among the many other features:
- IP65 protection rating of the user interface
- management of three types of backlight
- memorisation of the defrosting interval
- management of temperature alarms
- compressor operating hours count, "keyboard block" function.