µC2SE for process chiller Electronic controller ENG User manual Integrated Control Solutions & Energy Savings
ATTENTION DISPOSAL CAREL bases the development of its products on several years’ experience in the HVAC field, on continuous investment in technological innovation of the product, on rigorous quality procedures and processes with in-circuit and function tests on 100% of its production, on the most innovative production technologies available on the market.
Index 1. Introduction .............................................................................................................................................................................................................................................. 7 General description ....................................................................................................................................................................................................................7 Codes ........
1. INTRODUCTION 1.1 General description 1.3 Accessories 2 µC 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.
1.3.4 Fan speed management board (code FCS3*) 1.3.8 The FCS range appliances are electronic three-phase voltage regulators that use the phase cut principle to regulate the output voltage supplied to the load, depending on the command signal applied to the input. They can drive asynchronous electric motors connected, for example, to axial fans, pumps, mixers, stirrers etc. 1.3.5 Remote terminal (code MCH200T*00) Allows the complete configuration of the remote controller.
2 INSTALLATION 2.1 Type of fixing and dimensions 2 4 µC SE for process chiller is supplied with connectors of different format to facilitate the electric connections. The EVD driver and the I/O board must be installed on DIN guide. Dimensions (mm) 2.2 Operational layouts 2 4 Below find the structure of the tLAN network, with the µC SE controller for process chiller, which can operate alone or with the I/O expansion board. The EVD driver is an optional.
2 2.
2.7 Connection with CONV0/10VA0 and CONVONOFF0 modules (accessories) The CONV0/10AVA0 and CONVONOFF0 modules allow to convert a PWM output for SSR respectively into an analogue output 0…10Vdc and into an ON/OFF output with relay. Note that with the same controller 3 different types of outputs can be obtained. Key CONV0/10A0 - CONVONOFF0 module Terminal Description 1 24 Vac power supply 2 Power supply reference 3 PWM (+) command signal 4 PWM (-) command signal CONV0/10A0 module Terminal Description 5 0...
Case 2: several controllers connected in network powered by the different transformers (G0 not connected to earth). Typical application of several controllers that are part of different electric control boards. UPLOAD - copy parameters from controller to key 2.9.1 Procedure: open the rear door of the key and position the two dip-switches at OFF.
3 USER INTERFACE The front panel contains the display and keyboard, made up from 4 keys, which, pressed individually or together, allow to perform all of the controller programming operations. 3.1 Display The display features 3 digits, with the display of the decimal point between -99.9 and 99.9. Outside of this range of measurement, the value is automatically displayed without the decimal (even if internally the unit still operates considering the decimal part).
Parameters modification procedure: 3.4 Programming 1. Press “ “ and “ ” for 5 s; 2. The and symbols appear along with “00”; The parameters divide into 4 different levels according to their accessibility by the user via password and their function. Entering a certain level it is possible: 1. to access all parameters of the same level and the lower levels (S-P menu); 2. set the desired level for each parameter (L-P menu). 3. Set the password via “ ” and “ ” and confirm with “ 4.
4 COMMISSIONING - 4.
4.3 Minimum and maximum fan speed calculation This procedure should only be performed when the fan speed control boards are used (code MCHRTF*). When ON/OFF modules are used (code CONVONOFF0) or alternatively the PWM to 0 to 10 V converters (code CONV0/10A0) are used, parameter F03 should be set to zero, and parameter F04 to the maximum value.
5 FUNCTIONS r13 0.
The parameters /13…/16 allow to correct the measurement shown on the display, adding an offset of the measurement read by the probe: the value assigned to this parameter is added to the probe if positive or removed if negative. P08: as well as the flow switch/pump thermal overload/general alarms with manual or automatic reset, it is possible to configure the digital input for: the set point change from r01 to r21, limited by parameters r13 and r14 (minimum and maximum set-point); On/Off remote.
H11 7 compressor 1 heater step 1 heater step 2 alarm 8 compressor 1 heater 1 step condenser fan alarm 4 compressor 1 evaporator pump compressor 2 (or compressor 1 partialization) alarm 5 compressor 1 heater 1 evaporator pump condenser fan 6 compressor 1 heater step 1 - alarm alarm 9 compressor 1 compressor 2 alarm 10 compressor 1 compressor 2 heating step 1 alarm 11 compressor 1 compressor 2 heating step 1 alarm 12 compressor 1 P25 P26 P27 P28 Alarm relay output logic 0/1=Normally unexcited/exci
r27 Accumulation vessel suppression (low load) 0=Disabled 1=Enabled 2=Do not select 3=Do not select Min. compressor running time for low load Low load differential r28 r29 t a n k U.M. Description Min Max Par. Def The low load differential is r29. This parameter represents the new differential considered by the controller during the low load condition. Specifically r02 is replaced by r29. 0 0 3 - 60 3 0 999 1 50 s °C/°F u s e r s evaporator 2 20 µC SE process chiller +030220416 - rel. 2.
6 CONTROL ON 6.1 Anti-freeze Anti-freeze alarm set-point Anti-freeze alarm set-point limit Anti-freeze alarm differential Anti-freeze alarm delay time from switch-on 3 -40 A07 -40 A04 176 °C/°F °C/°F 5 0.3 122 °C/°F 0 0 150 s OFF S3 A14 + A02 A14 t Key A14 S3 Differential Time ON 6.4.
6.4.4 Maximum operating time of compressor in tandem (par. c09) 6.4.7 r07: neutral zone. The neutral zone moves the proportional band by r07 from the set-point and is valid in all configurations, if enabled by parameter r06. r06: compressors regulation type. This parameter allows to set the logic for maintenance of the set-point. r07 U.M.
2 logic times are considered: activation time deactivation time. 6.4.9 50 999 999 999 999 50 Def Min Max U.M. Outputs activation delay 0 0 999 s 6.4.10 Compressors deactivation external temperature (par.r25) The compressors are deactivated if the external temperature drops below the value of r25. The differential for re-activation is fixed at 1 degree. The resistances can be activated according to the relative set-points. °C/°F s s s s °C/°F Par. Description U.M. 0.
(parameters F05-F06). When the compressors switch off, the fan deactivates irrespective of the condensing temperature/pressure. 6.6 Compressor – evaporator pump/valve delays 6.6.1 F02 = 3: on when the relative compressor is active with speed control. When the compressor switches off, the fan also switches off irrespective of the condensing temperature/pressure.
6.8 Hot gas bypass ON The hot gas by-pass in temperature mode function allows to increase the temperature of the output water from the evaporator. The output enabled is the controller analogue output Y1 (water-water chiller) or Y2 (air-water chiller) of the I/O expansion board. FAN OFF Def Par. Description H25 Hot gas by-pass 0/1 = disabled/enabled H26 Hot gas by-pass in stand-by 0/1 = disabled/enabled 1°C/0.5 bar F04 FAN SPEED Max F05 U.M.
6.10 Heaters management r43 Heaters set-point: 0=A04, A08, A11, P16, P19 absolute 1=A04, P16, P19 absolute, A08, A11 relative 2=A08, A11, P16, P19 absolute, A04 relative 3=P16, P19 absolute, A04, A08, A11 relative 4=A04, A08, A11 absolute, P16, P19 relative 5=A04 absolute, A08, A11, P16, P19 relative 6=A08, A11 absolute, A04, P16, P19 relative 7=A04, A08, A11, P16, P19 relative 7 Max Min Def Par. Description 0 U.M.
7 PARAMETERS TABLE 2 7.1 µchiller SE process parameters table Variable type 1 - 1 - 1 1 R/W D F 0 1 - 1 - 2 2 R/W D F 0 3 - 0 - 14 221 R/W I F 0 4 - 0 - 15 222 R/W I F 0 /10 Vdc/100 50 P 18 225 R/W I 450 P 19 226 R/W I 1 R/W A max R/W 0 U.M. F min Visibility ModBus® SVP CAREL Variable type: A = analog D = digital I = Integer Def.
4 Probes reading parameters: b* b00 Display 0 = Probe B1 1 = Probe B2 2 = Probe B3 3 = Probe B4 4=Do not select 5=Do not select 6=Do not select 7=Do not select 8=Set point without compensation 9=Set point with compensation 10=ID remote 11=Do not select b01 Probe B1 reading 0 3 U A01 80 Variable type - 23 230 R/W I °C/°F 7 AA 67 67 R/W A 7 AR 79 79 R/W A 81 R/W A max U SVP CAREL 0 U.M.
ModBus® R/W Variable type Visibility SVP CAREL Def.
U 1 H11 Outputs setting (table) F 0 - 1 - 58 - - 59 0 16 R/W D 265 R I 266 R/W I H11 NO1 NO2 NO3 0 compressor 1 heater 1 evaporator pump 1 compressor 1 heater 1 evaporator pump 2 compressor 1 heater 1 evaporator pump 3 compressor 1 evaporator pump 4 compressor 1 evaporator pump 5 compressor 1 heater 1 evaporator pump 6 compressor 1 heater step 1 - NO4 - compressor 2 (or comp.1 partialisation) alarm compressor 2 (or comp.
ModBus® R/W Variable type Visibility SVP CAREL Def. 1 - 60 267 R/W I F 0 1 - 0 V 17 17 R/W D F 0 50 bar 2 V 37 37 R/W A H15 Pump down maximum time F 0 180 s 30 V 61 268 R/W I F 0 1 - 0 - 18 18 R/W D F 0 1 - 0 - 11 11 R/W D F 0 3 - 0 - 124 331 R/W I F 0 1 - 0 - 25 25 R/W D H13 H22 max flag min 3 Level U.M. Description 0 Par.
R/W Variable type ModBus® SVP CAREL Visibility 0 - 76 283 R/W I U -40 176 °C/°F 28 AA 38 38 R/W A P16 Relative high temperature threshold alarm U 0 100 °C/°F 16 AR 82 82 R/W A P17 High temperature on switch-on alarm delay U 0 250 min 30 - 77 284 R/W I P18 F 0 99,9 bar 20 P 39 39 R/W A P19 High pressure alarm threshold 0=alarm disabled Low temperature alarm threshold U -40 176 °C/°F 10 AA 40 40 R/W A P19 Relative low temperature alarm thres
Visibility SVP CAREL ModBus® R/W Variable type Def. 18 - 0 - 143 350 R/W I 0 - 144 351 R/W I 352 R/W I max U.M. 0 min F Level Description Par.
SVP CAREL ModBus® R/W Variable type Visibility 0 - 121 328 R/W I D r46 176 °C/°F 30 - 84 84 R/W A r46 Relative regulation minimum set point F -40 r45 °C/°F 10 - 85 85 R/W A Firmware parameters: F - r* H99 Software version D 0 99.9 int - - 1 208 R I H97 Driver software version D 0 99.9 int - V 3 210 R I H95 Expansion software version (I/O board) D 0 99.9 int - - 149 356 R I 7.2 - max U.M. - min 7 Level Def. Description 0 Par.
Description P05 Alarms reset 0=HP1/LP1/A1/Lt manual 1=HP1/LP1/A1/Lt automatic 2=HP1/A1/Lt manual; LP1 automatic 3=HP1 manual; LP1/A1/Lt automatic 4=HP1/LP1 manual; A1/Lt automatic 5=HP1/LP1 (3 times in one hour) manual; A1/Lt automatic 6=HP1/LP1 (3 times in one hour) manual; A1/Lt manual Alarm relay output logic 0/1=Normally unexcited/excited P21 On the basis of the following table, the alarm can cause the output to switch-over (ON), switch-off (OFF) or the output maintains the previous status (-).
Alarm type Reset Compressor Pump Fan Heater Exp. Output I/O exp. valv alarm board e Superv. variable Superv. variab.
P02 P03 150 s A01 0 120 s 40 0 200 s Anti-freeze alarm set point 3,0 A07 A04 °C/°F A07 Anti-freeze alarm threshold limit -40 -40 176 °C/°F A02 Anti-freeze alarm differential 5,0 0,3 122 °C/°F A03 Anti-freeze alarm delay time from switch-on 0 0 150 s ON ON ON A1 A1 CMP OFF OFF OFF ON AL U.M. 0 Max 20 5 Description Min Par. Def U.M.
Description Min Max U.M. P19 Low temperature alarm threshold 10 -40 176 K/°F P19 Relative low temperature alarm threshold High/low temperature on switch-on protection 0/1=disabled/enabled High/low temperature alarm effect 0: No compressor stop 1: Stop due to high temperature alarm 2: Stop due to low temperature alarm 3: Stop due to high or low temperature alarm 2 0 100 °C/°F 0 0 1 - 0 0 3 - P20 H24 Def Par. EP1: EEPROM driver error.
9 TECHNICAL SPECIFICATIONS Power supply 12-way connector Relay Digital Inputs Analogue inputs Fan output Front protection rating Storage conditions Operating conditions Level of pollution Heat and fire resistance cat. PTI of the isolating materials Class and structure of the software Period of electric stress across insulating parts Type-approvals 24 Vac, range +10/–15 %; 50/60 Hz Maximum input power: 3 W 2 Fuse mandatory in series with µC SE power supply: 315 mAT Max.
Operational specifications Analogue inputs resolution Pressure measurement error Temperature probes: interval -40T80 °C, 0.1 °C Interval -20T20 °C, ±0.5 °C (probe excluded) Interval -40T80 °C, ±1.5 °C (probe excluded) The % voltage error with a range of input from 0.5 to 4.5 is ± 2% (excluding probe).
9.1 Software revisions Revision 1.5 Revision 1.5 Description The parameters that in release 2.0 were indicated as “do not select” are not more visible: c12, c13, F15, F16, H02, H03, H06, H21, P22, P33, r30, r47, r48, all “t” parameters Default values modified: H08: from 4 a 0; r43: from 7 a 0; A08: from 25 a 5; A11: from 25 a 7 The function of remote On/Off from digital input is now correct The function of programming key is now correct Range parameter P18 modified (0…99.
2 µC SE process chiller +030220416 - rel. 2.2 - 25.01.
2 µC SE process chiller +030220416 - rel. 2.2 - 25.01.
CAREL INDUSTRIES HQs Via dell’Industria, 11 - 35020 Brugine - Padova (Italy) Tel. (+39) 049.9716611 - Fax (+39) 049.9716600 e-mail: carel@carel.com - www.carel.com μC2SE for process chiller - +030220416 - rel. 2.2 - 25.01.
