User manual

µC
2
SE process chiller +030220416 - rel. 2.2 - 25.01.2013
1. INTRODUCTION
1.1 General description
µC
2
SE for process chiller is a compact electronic controller designed for the
complete management of the process chiller with 1 refrigerating circuit: it can
control air-water and water-water machines. The controller has 5 digital inputs, 5
digital outputs, 4 analogue inputs and 1 analogue output.
It can be installed:
- individually;
- connected to the tLAN network with the EVD
4
driver to manage the electronic
expansion valve;
- connected in tLAN network with inputs/outputs expansion board.
The PWM output can be converted using the following modules:
• CONV0/10A0: conversion from PWM output for SSR into a linear analogue signal
0...10 Vdc and 4...20 mA;
• CONONOFF0: conversion from PWM output for SSR into an On/Off output from
relay.
1.1.1 Main functions
Briefly:
- control of: compressor, condenser fan, water pump for evaporator
and/or condenser, anti-freeze heaters, alarm signal devices;
- regulation of the set-point on evaporator input probe (B1), evaporator
output probe (B2) or differential (B1-B2);
- condenser fan/pump speed control;
- complete alarms management;
- elimination of storage vessel in event of low load;
- serial connection to the EVD
4
driver for control of the electronic
expansion valve;
- serial connection to the I/O expansion board for:
1. connection of devices (thermostats/pressure switches) to digital
inputs of the I/O board;
2. display of further warnings/alarms on the controller display;
3. selection of the digital outputs to switch-over.
1.2 Codes
Description Code
µC
2
SE 1 circuit, 2 compressors, panel assembly MCH2000050
µC
2
SE 1 circuit, 2 compressors, panel assembly (20 pieces) MCH2000051
µC
2
SE I/O board
MCH2000060
RS485 optional board for µC
2
SE MCH2004850
Programming key for µC
2
SE with 230 V power supply unit PSOPZKEYA0
PWM-On/Off converter board CONVONOFF0
PWM-0...10 V converter board CONV0/10A0
Temperature probes: *** depending on the length
(015= 1.5 m, 030= 3 m, 060=6 m)
NTC***WP00
Pressure probes for condenser control
** depending on the pressure (13= 150 PSI, 33= 500 PSI)
SPKT00**R0
Connectors kit for code MCH2000051 (multi-pack 20 pieces) MCH2CON001
Minifit connectors kit +cables measuring 1 m for code. MCH2** MCHSMLCAB0
Minifit connectors kit +cables measuring 2 m for code. MCH2** MCHSMLCAB2
Minifit connectors kit + cables measuring 3 m for code. MCH2** MCHSMLCAB3
Remote terminal for MCH2000050 for panel assembly MCH200TP00
Remote terminal for MCH2000050 for wall assembly MCH200TW00
Serial connection kit for remote terminal supervisor MCH200TSV0
Boards with PWM output for fan speed control:
4A/230 Vac MCHRTF04C0
8A/230 Vac MCHRTF08C0
12A/230 Vac MCHRTF12C0
10A/230 Vac 1 piece MCHRTF10C0
10A/230 Vac 10 pieces MCHRTF10C1
1.3 Accessories
1.3.1 I/O board (code MCH2000060)
The board, connected in tLAN network to the controller, has 5 digital inputs and 5
digital outputs. The switch-over of every digital input can be associated to a
determined alarm signal, shown on the controller display and also to a switch-over
on the selected digital output.
1.3.2 Driver for electronic expansion valve
(code EVD0000400 - tLAN)
The driver, connected in tLAN network to the controller, allows to control the
electronic expansion valve in the cooling circuits. The condensation pressure probe
must be connected to the controller, which will send it to the driver. See the
manual code +030220227.
1.3.3 Fan speed management board
(code MCHRTF*)
The single-phase voltage regulators MCHRTF use the phase cut principle to regulate
the rms voltage leaving the load, on the basis of the PWM command signal phase.
A typical application is that of regulating the speed of the condenser single-phase
fans, on the basis of the pressure or temperature measured on the heat exchanger
itself.
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