Ventair CU24V1 Operation Instruction Manual Download Page 7 | Manualshive

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7

Analog inputs (0-10VDC signal inputs)

X1

Sensor CO

2

(optional)

Temperature sensor PT1000

B1

Exhaust

B2

Supply

B3

Exhaust behind the recuperator

B4

Outdoor

Digital outputs

U1/U2

Heating water pump

Relay (230VAC)

Electric heater

Relay (230VAC)

DA

Inlet/outlet flap

Relay (24VAC)

Q1

Supply fan

Relay

Q2

Exhaust fan

Relay

Q3

Cooling water pump / Cooling water source operation signal

Relay

1st cooling source / Condensing unit operation signal

Relay

Q4

2st cooling source / Heating/cooling signal for condensing unit

Relay

Analog outputs (0-10VDC, PWM signal outputs)

Y1

Supply fan control

Y2

Exhaust fan control

Y3

Heater (water or electric) / Heat pump

Y4

Water cooler

Y5

Heat / cold recovery (plate / rotary recuperator)

Y6

Mixing flap (10-0V), inlet / outlet flap (0-10V)

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Summary of Contents for CU24V1

Page 1: ...Operation instruction Controller for air handling units CU24V1 ...

Page 2: ...ventiair com technical ventiair com Phone 420 602 500 287 The device is manufactured in accordance with the European standard EN1886 EN13053 This documentation must always be handed over to the customer In case of non compliance with the conditions stated in this documentation VentiAir s r o reserves the right to refuse the warranty Version 02 2021 ...

Page 3: ...arameters 11 4 2 2 Heating parameters 11 4 2 3 Cooling parameters 12 4 2 4 Heating cooling hysteresis 13 4 2 5 Pre heating if included 13 4 2 6 Compressor 13 4 2 7 Heat exchanger parameters 14 4 2 8 Exchanger defrost 14 4 2 9 Recirculation dampers control mixing chamber 15 4 2 10 By pass and earth exchanger settings not a standard 15 4 2 11 Fan parameters 15 4 2 12 CO2 control 16 4 2 13 Programmin...

Page 4: ...0 6 2 Operating state register description 22 6 2 1 Register 1 22 6 2 2 Register 2 22 6 3 Alarm register description R1H R1L 23 6 3 1 RH Register 1 Most significant high register 23 6 3 2 RL Register 2 Least significant low register 23 6 4 Input registers function 04 23 6 5 Coils Digital Outputs function 01 23 6 6 Discret inputs Digital inputs function 02 24 ...

Page 5: ...Water cooling and compressor control Preliminary heating function Water heater frost protection High temperature protection of electric heaters Fans control Inlet and outlet fan control Inverter control Engine alarm Heat recovery control Exchanger control Exchanger frost protection Exchanger protection by bypass damper or inlet fan speed modulation Real time clock with week schedule Alarms Alarms ...

Page 6: ...tput 230 V Y1 Y6 Voltage outputs 0 10 V DC P1 P2 24 V DC modulated outputs for continuous regulation of electric heaters Controlled devices should be connected between P1 and ground M or P2 and ground M A1 B1 Serial interface RS485 Nr 1 A2 B2 Serial interface RS485 Nr 2 Digital outputs When the system works properly In an alarm condition E1 Water heater frost protection thermostat closed Freeze al...

Page 7: ... Q1 Supply fan Relay Q2 Exhaust fan Relay Q3 Cooling water pump Cooling water source operation signal Relay 1st cooling source Condensing unit operation signal Relay Q4 2st cooling source Heating cooling signal for condensing unit Relay Analog outputs 0 10VDC PWM signal outputs Y1 Supply fan control Y2 Exhaust fan control Y3 Heater water or electric Heat pump Y4 Water cooler Y5 Heat cold recovery ...

Page 8: ...8 3 WIRING DIAGRAM OF THE CONTROLLER ...

Page 9: ... Y3 and P2 of the CU24V1 controller work independently of the type of heater while the E1 input depending on the type of heater functions as an anti freeze alarm or a high temperature alarm Heating CU24V1 outputs CU24V1 input Y3 P2 U1 U2 E1 water 0 10V heating control PWM output for electric heater 230 VAC Pump start Frost alarm of water heating coil electr 0 10V heating control PWM output for ele...

Page 10: ...MPER Recirculation mixing chamber with 0 10V control at Y6 output of the controller EXC DAMPER Plate heat exchanger with by pass or rotary heat exchanger recirculation mixing chamber 0 10V control outputs of the CU24V1 controller are respectively Y5 for the exchanger and Y6 for the mixing chamber Type of exchanger protection B3 Temperature sensor at input B3 E5 Presostat control at input E5 4 1 4 ...

Page 11: ... Range Description PBAND 30 0 C 0 999 9 C Proportional band Setting PBAND 0 means ON OFF operation with hysteresis and the entered HYS parameter INT 100 sec 0 6000 sec Integral time HYS 1 5 C 0 5 10 0 C Hysteresis for two position control If the PBAND 0 hysteresis determines the HYS parameter Operation ON OFF HDIS 18o C 10 22o C Outside temperature above which the heating is turned off the SUMMER ...

Page 12: ... 1 5 C 0 5 10 0 C Hysteresis for two position control If the PBAND 0 hysteresis determines the HYS parameter Operation ON OFF CDIS 15o C 10 22o C Outside temperature below which the cooling is turned off the WINTER mode CDIS parameter operation scheme Outdoor temperature CDIS CDIS 1 Cooling disabled Hysteresis Enable cooling Disable cooling Outdoor temperature HDIS 1 HDIS Heating enabled Hysteresi...

Page 13: ...ed before the heat exchanger The temperature is measured by a sensor located at the outlet of the heat exchanger The set temperature is marked T set T measured indicates the current temperature on the heat exchanger Name Default value Range Description t set 8 0o C 10 30o C Required temperature for preheater 4 2 6 COMPRESSOR Name Default value Range Description CPOFF 180 sec 30 300 sec Compressor ...

Page 14: ...g the extract fan at the highest speed for a period of two to five minutes depending on the outside temperature while the inlet fan is stopped After the defrost time has elapsed the extract fan returns to the programmed speed for 20 minutes and the inlet fan remains off unless the frost alarm goes off If after 20 minutes the heat exchanger temperature is still lower than the alarm level the defros...

Page 15: ...dependency between the fan speeds according to the following formula Air exhaust fan speed air supply fan speed x FCOEF START Delayed start After the system switched on the shut off dampers open the fans start only after the set interval has elapsed STOP Delayed stop After the system switched off all devices will switch off while the fans continue to run for the time specified by the STOP paramete...

Page 16: ...d in the X1 input of CU24V1 CO2 regulation is achieved either by adjusting the fan speed or by adjusting the dampers If the damper parameter is set DAMP AUTO the damper is adjusted If DAMP has a value other than AUTO then the regulation is controlled by fan speed 4 2 13 PROGRAMMING THE FAN GEARS Name Default value Range Description SPD1 25 10 100 Fan speed for gear 1 SPD2 50 10 100 Fan speed for g...

Page 17: ... maximum speed 4 The supply fan is at minimum speed The exhaust fan is at minimum speed 5 The supply fan is at maximum speed The exhaust fan runs at first speed 6 The supply fan is at maximum speed The exhaust fan is off For example a humidity sensor or any other device that will perform the required function can be connected to input E4 An example of use can be a button on the toilet as well Inpu...

Page 18: ...e Safari etc 5 1 SAMPLE INTERFACE PAGES 5 2 CONNECTION Connect the converter from one side to the controller through the RS485 serial port terminals A B and on the other hand to the Internet socket A 24VAC supply must be connected to the G0 G terminals Descriptions of symbols G0 G 24 VAC power supply A B RS485 serial port 5 3 LED DESCRIPTION POWER Power supply signalling Modbus Modbus communicatio...

Page 19: ... logging in select the option Detail at the bottom right of the screen In the subpage Ethernet Configuration you must replace the factory IP with your own and set the network settings In the subpage Modbus Configuration the communication parameters of the converter with the UCS controller must be set The communication parameters must be identical to those set on the UCS controller For the ERC20 an...

Page 20: ...not all software are able to use address above 9999 To have access to the second address just subtract the value 55536 from the address listed in the tables Items in red colour are not available Register Name Register MODBUS Address PWM outputs P NOTE 1 Control values are in w with 1 10 precision After reading the register value the dot should be placed artificially Ex Reading the value 257 should...

Page 21: ...er 1 1 Register 2 65152 65153 Sensed values 1 The sensed values have 1 10 precision After reading the sensed value it should be divided by 10 Ex Reading the number 257 should be treated as 25 7 2 Reading the value 0xFFFF means that the parameter does not exist 0 Indoor exhaust temperature 1 CO2 sensed value 3 Supply temperature 6 Outdoor temperature 8 Exchanger exhaust air temperature 25 Ground He...

Page 22: ...trol of the preliminary heater heating process 14 Temperature control of the preliminary heater cooling process No 15 Exchanger defrosting process 6 2 2 REGISTER 2 Bit nr Process Availability 0 Primary heating main heating Indoor temperature control 1 Secondary heating No 2 Cooling Indoor temperature control 3 Exchanger exhaust air temperature control heating 4 No 5 Humidification process No 6 Deh...

Page 23: ... heating coil frost alarm A1 1 Alarm fan thermo A2 No 2 Inlet fan pressure guard alarm A3 3 Extract fan pressure guard alarm A4 No 4 Fire alarm A5 No 5 High temperature alarm A6 6 Exchanger freezing alarm A7 7 Alarm anti freeze A8 No 8 Pump alarm A9 No 9 Filter pressure guard alarm A10 10 R1 No 11 R1 No 12 R2 No 13 R2 No 14 R3 No 15 R3 No 6 4 INPUT REGISTERS FUNCTION 04 Inputs Address MODBUS B1 Ex...

Page 24: ... start Exhaust fan inverter start Compressor 1 level Compressor 2 level Address 0 1 2 3 4 5 6 6 DISCRET INPUTS DIGITAL INPUTS FUNCTION 02 Inputs E1 E2 E3 E4 E5 Function Frost thermostat or high temperature thermostat Filter guard Fan alarm Compressor alarm System start Address 0 1 2 3 4 ...

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