Operation And Adjustment; General Features Of The Microprocessor Control System; Instructions For Setup And Adjustment - RHOSS TCCE 135 Gebrauchsanweisung

II.4

OPERATION AND ADJUSTMENT

II.4.1 GENERAL FEATURES OF THE
MICROPROCESSOR CONTROL SYSTEM
II.4.1.1 Microprocessor electronic board
The electronic control basically involves two parts:
• A base unit called the INPUT/OUTPUT BOARD.
• Control unit, also called USER INTERFACE PANEL .
• Scheme of the system:
Fig. 12
Wired in factory
Optional
Conn A – Conn B
Digital inputs (unit protections and remote controls)
Analog inputs (temperature and pressure probes)
Analogue outputs (signal 0÷10 Vdc per KFI)
12 Vac power supply
Relay digital outputs (control of coils, valves and remote controls)
Connection to KCH (optional)
Machine-side/remote keyboard
II.4.1.2 Input/output board
○ The input/output board consists of:
• a section containing the microprocessor and the memories which
manage the unit control algorithm;
• a part interfacing the panel and the supervision network;
• a section dedicated to the inputs/outputs which allow interfacing with
devices controlled through a terminal board featuring removable
connectors.
ID1
Differential water pressure switch
ID2 Remote On/Off
ID3
Remote summer/winter (on heat pumps)
ID4 Compressor 1 thermal overload
ID5
Compressor 2 thermal overload (only for models 260)
ID6 Circuit 1 low pressure switch
ID10 Circuit 1 high pressure switch
Conn C
Serial
Kbd
DIGITAL inputs
SECTION II: INSTALLATION AND MAINTENANCE
R1 Compressor 1 contactor
R2 Compressor 2 contactor (only for models 270)
R3 Cycle inverter valve circuit 1 (in heat pump)
R5 Antifreeze heating element
R6 Fan contactor
R7 Pump control
ST1
Evaporator inlet water sensor (working sensor)
ST2 Evaporator outlet water sensor (antifreeze sensor)
ST3: Circuit 1 pressure transducer (defrosting sensor)
II.4.2 INSTRUCTIONS FOR SETUP AND
ADJUSTMENT
The unit is adjusted according to the condenser/evaporator inlet water
temperature. The temperature is kept thermostatically within a preset
band. Once the set point and the water temperature control differential
have been selected, the controller manages the available compressors
in order to meet the thermal load required by the user.
Cooling
130÷160
Heating
130÷160
Cooling
270
Heating
270
41
DIGITAL outputs
ANALOGUE inputs