µC2SE for process chiller
electronic control
User manual
ENGLISH
IMPORTANT WARNINGS
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. CAREL and its branch offices/affiliates do not guarantee, in any
case, that all the aspects of the product and the software included in the product will respond to the
demands of the final application, even if the product is built according to state-of-the-art techniques. The
client (builder, developer or installer of the final equipment) assumes every responsibility and risk relating
to the configuration of the product in order to reach the expected results in relation to the specific final installation and/or equipment. CAREL in this case, through specific agreements, can intervene as consultant
for the positive result of the final start-up machine/application, but in no case can it be held responsible
for the positive working of the final equipment/apparatus.
The CAREL product is a state-of-the-art product, whose operation is specified in the technical documentation supplied with the product or can be downloaded, even prior to purchase, from the website www .
carel. com.
Each CAREL product, in relation to its advanced technological level, needs a phase of definition / configuration / programming / commissioning so that it can function at its best for the specific application.
The lack of such phase of study, as indicated in the manual, can cause the final product to malfunction of
which CAREL can not be held responsible.
Only qualified personnel can install or carry out technical assistance interventions on the product.
The final client must use the product only in the manner described in the documentation related to the
product itself.
Without excluding proper compliance with further warnings present in the manual, it is stressed that in
any case it is necessary, for each Product of CAREL:
• To avoid getting the electrical circuits wet. Rain, humidity and all types of liquids or condensation
contain corrosive mineral substances that can damage the electrical circuits. In any case, the product
should be used and stored in environments that respect the range of temperature and humidity
specified in the manual.
• Do not install the device in a particularly hot environment. Temperatures that are too high can shorten
the duration of the electronic devices, damaging them and distorting or melting the parts in plastic. In
any case, the product should be used and stored in environments that respect the range of temperature and humidity specified in the manual.
• Do not try to open the device in any way different than that indicated in the manual.
• Do not drop, hit or shake the device, because the internal circuits and mechanisms could suffer
irreparable damage.
• Do not use corrosive chemical products, aggressive solvents or detergents to clean the device.
• Do not use the product in application environments different than those specified in the technical
manual.
All the above reported suggestions are valid also for the control, serial unit, programming key or nevertheless for any other accessory in the product portfolio of CAREL.
CAREL adopts a policy of continuous development. Therefore, CAREL reserves the right to carry out
modifications and improvements on any product described in the present document without prior notice.
The technical data in the manual can undergo modifications without obligation to notice.
The liability of CAREL in relation to its own product is regulated by CAREL’s general contract conditions
edited on the website www .carel. com and/or by specific agreements with clients; in particular, within the
criteria consented by the applicable norm, in no way will CAREL, its employees or its branch offices/affiliates be responsible for possible lack of earnings or sales, loss of data and information, cost of substitute
goods or services, damage to things or persons, work interruptions, or possible direct, indirect, incidental,
patrimonial, of coverage, punitive, special or consequential in any way caused damages, be they contractual, out-of-contract, or due to negligence or other responsibility originating from the installation, use
or inability of use of the product, even if CAREL or its branch offices/affiliates have been warned of the
possibility of damage.
2.
3.
4.
5.
Disposal of the product
In reference to European Community directive 2002/96/EC issued on 27 January 2003 and
the related national legislation, please note that:
1. we cannot be disposed of as municipal waste and such waste must be collected and
disposed of separately;
the public or private waste collection systems defined by local legislation must be used. In addition,
the equipment can be returned to the distributor at the end of its working life when buying new
equipment.
the equipment may contain hazardous substances: the improper use or incorrect disposal of such may
have negative effects on human health and on the environment;
the symbol (crossed-out wheeled bin) shown on the product or on the packaging and on the instruction sheet indicates that the equipment has been introduced onto the market after 13 August 2005 and
that it must be disposed of separately;
in the event of illegal disposal of electrical and electronic waste, the penalties are specified by local
waste disposal legislation.
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
3
ENGLISH
4
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
CONTENTS
7
ENGLISH
1. INTRODUCTION
1.1 General description ..............................................................................................................................7
1.2 User interface ........................................................................................................................................7
2. CONNECTIONS
9
2.1 General diagram ...................................................................................................................................9
2.2 Network layout .....................................................................................................................................9
3. APPLICATIONS
10
3.1 AIR/WATER chiller.................................................................................................................................10
3.2 WATER/WATER chiller .........................................................................................................................11
4. PARAMETERS
13
4.1 General parameters .............................................................................................................................13
4.2 Menu structure .....................................................................................................................................13
4.3 Parameter tables ..................................................................................................................................14
5. DESCRIPTION OF THE PARAMETERS
23
6. TABLE OF ALARMS
48
7. CONNECTIONS, ACCESSORIES AND OPTIONS
52
7.1 Connection diagram ..............................................................................................................................52
7.2 Expansion card .......................................................................................................................................53
7.3 EVD4*: Electronic expansion valve driver ........................................................................................53
7.4 Fan speed control board (code MCHRTF*).....................................................................................54
7.5 Fan ON/OFF control board (code CONVONOFF0) ......................................................................54
7.6 PWM to 0 to 10Vdc (or 4 to 20 mA)conversion board for fans ...............................................
(code CONV0/10A0)....................................................................................................................................54
7.7 Minimum and maximum fan speed calculation .............................................................................54
7.8 Programming key (code PSOPZKEYA0) ...........................................................................................55
7.9 RS485 serial options..............................................................................................................................56
7.10 Terminals ................................................................................................................................................56
8. DIMENSIONS
57
9. CODES
59
10. TECHNICAL SPECIFICATIONS AND SOFTWARE UPDATES
59
10.1 Technical specifications .....................................................................................................................59
10.2 Software updates................................................................................................................................60
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
5
ENGLISH
6
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
ENGLISH
1. INTRODUCTION
1.1 General description
The μC2SE is a compact CAREL electronic controller, the same size as a normal
thermostat, for the complete management of process chillers: it can control air-water
and water-water.
1.1.1 Main functions
•
•
•
•
•
•
control of the water inlet and evaporator outlet temperature;
defrost management by time and/or by temperature or pressure;
fan speed control;
complete alarm management;
connection to serial line for supervision/telemaintenance;
elimination of the expansion vessel.
- Driver function
• Management of electronic expansion valves.
1.1.2 Controlled devices
•
•
•
•
•
compressor;
condenser fans;
water pumps for evaporator and/or condenser;
antifreeze heater;
alarm signal device.
1.1.3 Programming
CAREL offers the possibility to configure all the unit parameters not only from the
keypad on the front panel, but also using:
• a hardware key;
• a serial line.
1.2 User interface
1.2.1 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).
In normal operation, the value displayed corresponds to the temperature read by probe
B1, that is, the evaporator water inlet temperature.
Fig. 1.a show the symbols present on the display and on the keypad and their meanings.
Fig. 1.a
1; 2
1; 3
A
B
C
D
E
F
G
H
amber
amber
amber
amber
amber
amber
amber
red
amber
amber
compressor 1 and/or 2 ON
compressor 3 and/or 3 ON
at least one compressor ON
pump ON
condenser fan ON
defrost active
heater ON
alarm active
heat pump mode
chiller mode
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
with LED flashing
start up request
start up request
start up request
defrost request
heat pump mode request
chiller mode request
K
F
Display with 3 green digits (plus sign and decimal point), amber symbols and red alarm
symbols.
meaning
with LED ON
L
G
1.2.2 Symbols on the display
colour
J
H
E D C B A
symbol
I
reference
refrigerant
circuit
1
2
1/2
1/2
1/2
1/2
1/2
1/2
1/2
1/2
Table 1.a
7
ENGLISH
1.2.3 Functions associated with the buttons
button
I
L
I+L
J
K
unit status
Loading default values
Go up a sub-group inside the programming area, until exiting (saving changes to EEPROM)
In the event of alarms, mute the buzzer (if present) and deactivate the alarm relay
Access the direct parameters
Select item inside the programming area and display value of direct parameters/confirm the changes to the parameters
Program parameters afters entering password
Select top item inside the programming area
Increase value
Switch from standby to chiller mode (P6=0) and vice versa
Provides immediate access to the condenser and evaporator pressure and temperature probes and DTE, DTC1-2
Select bottom item inside the programming area
Decrease value
Provides immediate access to the condenser and evaporator pressure and temperature probes and DTE, DTC1-2
J+K
Manual alarm reset
Immediately reset the hour counter (inside the programming area)
L+J
Force manual defrost on both circuits
button press
press at power ON
press once
press once
press for 5 s
press once
press for 5 s
press once or press and hold
press once or press and hold
press for 5 s
press once
press once or press and hold
press once or press and hold
press once
press for 5 s
press for 5 s
press for 5 s
Table 1.b
1.2.4 Programming and saving the parameters
1.
2.
3.
4.
5.
6.
7.
8.
9.
press “ “ and “ ” for 5 seconds;
the heating and cooling symbol and the figure “00” are displayed;
use “ ” and “ ” to set the password (page 28) and confirm by pressing “ ”;
use “ ” and “ ” to select the parameter menu (S-P) or levels (L-P) and then press “ ”;
use “ ” and “ ” to select the parameter group and then press “ ”;
use “ ” and “ “ to select the parameter and then press “ ”;
after making the changes to the parameter, press “ ” to confirm or “ ” to cancel the changes;
press “ ” to return to the previous menu;
to save the modifications, press “ ” repeatedly until reaching the main menu.
Note:
a. the parameters that have been modified without being confirmed using the “ ” button return to the
previous value;
b. if no operations are performed on the keypad for 60 seconds, the controller exits the parameter
modification menu by timeout and the changes are cancelled.
1.2.5. Keypad
The keypad is used to set the unit operating values (see Parameters/alarms - Keypad combinations)
8
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
2.1 General diagram
EVD*40*:
driver
for electronic
expansion
valve
Optional board
MCH200002*:
I/O expansion
board for
µ2SE
PSOPZKEY*:
programming key
CONVONOFF*:
PWM/digital
converter
PW/Modbus® RTU
CAREL Supervisory
CONV0/10A0*:
PWM/analogic
converter
NTC: temperature
probes
MCHRTF**A0:
fan speed regulator
MCH200485*
RS485
serial card
MCH2*T*:
terminal
PW/Modbus® RTU
CAREL Supervisory
MCH2*TSV*:
adapter
SPKT: 0 to 5 V
pres. transducer
Fig. 2.a
2.2 Network layout
EV driver
Fig. 2.b
EV driver
ESP.
EV driver
Fig. 2.c
2
µC SE process chiller +030220416 - rel. 1.1 - 27.04.2010
EVD*40*:
driver for
electronic
expansion
valve
9
ENGLISH
2. CONNECTIONS
ENGLISH
3. APPLICATIONS
3.1 AIR/WATER chiller
3.1.1 Single circuit
Key:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
condernser fan overload
fan
condenser probe
flow switch
outlet evaporator probe
fan
antifreeze heater
inlet evaporator probe
compressor 1
high pressure
compressor overload
low pressure
water pump
compressor 2
2
3
4
5
6
7
8
9
13
11
10
12
14
Fig. 3.a.a
3.1.2 Two circuits, 2 condenser fan circuits and 2 evaporators
Key:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
1
condenser fan overload 1 and 2
fan 1 and 2
condenser probe 1 and 2
flow switch
outlet temperature probe
evaporator 1 and 2
outlet evaporator probe 1 and 2
antefreeze heater 1 and 2
compressor 1
high pressure 1 and 2
compressor overload 1 and 2
low pressure 1and 2
inlet evaporator probe
compressor 2
water pump
compressor 3
compressor 4
1
1
2
1
4
2
1
5
3
1
6
8
9
1
14
1
1
2
7
2
8
6
2
16
13
1
11
12
2
3
2
7
10
2
12 11
1
15
10
17
Fig. 3.a.b
10
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
1
Key:
1
3
3
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
2
4
5
1
6
7
1
8
1
7
2
2
6
8
condenser fan overload
fan
condenser probe 1 and 2
flow switch
outlet temperature probe
evaporator 1 and 2
outlet evaporator probe 1 and 2
antifreeze heater 1 and 2
compressor 1
high pressure 1 and 2
compressor overload 1 and 2
low pressure 1and 2
inlet evaporator probe
compressor 2
water pump
compressor 3
compressor 4
2
9
16
13
10
1
1
11
12
2
1
11
12
15
2
10
2
17
14
Fig. 3.a.c
3.2 WATER/WATER chiller
3.2.1 Single circuit
Key:
1
2
3
4
5
6
7
8
9
10
11
12
13
3
1
4
2
5
6
7
8
10
9
11
12
13
Fig. 3.b.a
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
11
water condensing temperature probe
condensator
flow switch
outlet evaporator probe
evaporator
antifreeze heater
inlet evaporator probe
compressor 1
high pressure
compressor overload
low pressure
water pump
compressor 2
ENGLISH
3.1.3 Two circuits, 1 condenser fan circuit
ENGLISH
3.2.2 Two circuits
Key:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
water condensing temperature probe 1 and 2
condensator 1 and 2
flow switch
outlet evaporator probe
evaporator
antifreeze heater 1 and 2
compressor 1
high pressure 1 and 2
compressor overload 1 and 2
low pressure 1 and 2
inlet evaporator probe
water pump
compressor 2
compressor 3
compressor 4
3
1
4
1
2
1
1
2
2
2
6
5
14
7
11
8
1
9
1
10
2
1
10
9
8
2
2
12
13
15
12
Fig. 3.b.b
3.2.3 Two circuits, 2 evaporators
Key:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
3
water condensing temperature probe 1 and 2
condensator 1 and 2
flow switch
outlet temperature probe
outlet evaporator probe 1 and 2
antifreeze heater 1 and 2
evaporator
water pump
compressor 1
high pressure 1 and 2
compressor overload 1 and 2
low pressure 1 and 2
compressor 3
compressor 2
compressor 4
inlet evaporator pressure
4
1
1
1
5
1
2
2
5
2
2
1
1
6
7
2
1
6
7
2
9
13
16
10
1
1
11
12
2
1
12
11
2
10
2
8
15
14
8
Fig. 3.b.c
12
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
2
ENGLISH
4. PARAMETERS
4.1 General parameters
The parameters are divided into 4 different types, according to their level of access by the user (password)
and their function.
For each level, only the access to the parameters of the same or lower level can be set.
This means that through “factory” password, acessing the menù “levels” (L-P), it is possible to set the
desired level for each parameter.
• Factory parameters: Accessible with the 66 “Factory” password, allow the configuration of all the unit
parameters.
• Super User parameters: Accessible with the 11 “Super User” password, allow the configuration
of the Super User, User and Direct parameters.
• User parameters: Accessible with password 22, allow the configuration of the parameters that typically
can be set by the user (User parameters) and the Direct parameters, consequently relating to the options.
• Direct parameters: Accessible without password, this are used to read the probe measurements and
any data, by any user, without compromising the operation of the unit.
N.B.: The modifications to the parameters regarding the configuration of the unit (type, number of
compressors,...) must be performed with the controller in Standby.
level
_d_
_U_
_S_
_F_
4.2 Menu structure
password
no password
22
11
66
F or 5”
main menù
Sa ve in the EEPROM
level name
direct
user
super user
factory
And
F or 5”
setting password
Or
Or
parameter
values
parameter level
parameters /*
parameters F-r*
parameters A*
probe settings
software
antifreeze
t* parameters
clock settings
parameters b*
probes
parameters r*
regulation
parameters c*
compressor
parameters P*
alarm
parameters D*
parameters H*
defrost
parameters F*
unit setting
fan
parameter values F1
parameters F1
level value F1
Or
parameters Fn
Fig. 4.a
2
µC SE process chiller +030220416 - rel. 1.1 - 27.04.2010
13
4.3 Parameter tables
ENGLISH
The following tables show of the parameters divided by type/family (e. g. compressor, probes, fans etc.).
• Key to the parameter tables
Level (default)
S= super user
F= factory
D= direct
Visibility:
The visibility of some groups depends on the type of controller and the value of the parameters.
D= defrost (if D01=1)
F= fan (if F01=1)
L= low noise (if F15=1-3)
N= NTC probe (if /04-/08=2)
P= pressure (if /04-/08=3)
V= driver (if H08 =1-3)
X= expansion (if H08=2-3)
M= pump down (if D17=1)
W= watch (if the clock board is fitted)
- = always present
Supervisor variables:
R/W = supervisor read/write parameter
R= supervisor read-only parameter
4.3.1 Evaporator and condenser temperature and pressure values: (d*)
display
indicat.
dtE
dC1
dC2
parameter and description
default
level
D
D
D
Current value of DTE
Current value of DTC1
Current value of DTC2
min.
max.
0
0
0
0
0
0
UOM variat. default visibility supervis.
variable
0
99 (R)
0
100 (R)
0
101 (R)
Modbus variable
type
99
Analog
100
Analog
101
Analog
Tab. 4.a
4.3.2 Probe setting parameters: (/*)
display
indicat.
/01
/02
/03
/04
/05
/06
/07
/08
/09
/10
/11
/12
/13
/14
/15
/16
/17
/18
/19
/20
/21
/22
/23
parameter and description
Probe type B1
0= not present
1= present
Probe type B2
0= not present
1= present
Probe type B3
0= not present
1= NTC Cond. Probe
2= NTC Out. Probe
3= differential control probe
Probe type B4
0= not present
1= ON/OFF (D.I)
2= NTC Out. Probe
3= ratiometric cond. Probe, 5 Vdc
4= differential control probe
Probe type B5
0= not present
1= present
Probe type B6
0= not present
1= present
Probe type B7
0= not present
1= NTC Cond. Probe
2= NTC Out. Probe
3= differential control probe
Probe type B8
0= not present
(expansion)
1= ON/OFF
2= NTC Out. Probe
3= ratiometric cond. Probe, 5 Vdc
4= differential control probe
NB. if more than one differential control probe
is configured, the priority is: B8, B7, B4, B3
Min. value voltage input
Max. value voltage input
Pressure min. value
Pressure max. value
Probe B1 calibration
Probe B2 calibration
Probe B3 calibration
Probe B4 calibration
Probe B5 calibration
Probe B6 calibration
Probe B7 calibration
Probe B8 calibration
Digital filter
Input limitation
Unit of measure
0= °C
1= °F
default
level
F
min. max. UOM
variat.
default
1
visibility supervis.
variable
1 (R/W)
0
1
Flag
1
F
0
1
Flag
F
0
3
F
0
F
Modbus
1
variable
type
Digital
1
0
-
2 (R/W)
2
Digital
int
1
0
-
14 (R/W)
221
Integer
4
int
1
0
-
15 (R/W)
222
Integer
0
1
Flag
1
0
X
3 (R/W)
3
Digital
F
0
1
Flag
1
0
X
4 (R/W)
4
Digital
F
0
3
int
1
0
X
16 (R/W)
223
Integer
F
0
4
int
1
0
X
17 (R/W)
145
Integer
F
F
F
F
F
F
F
F
F
F
F
F
U
U
U
0
/09
0
/11
-12.0
-12.0
-12.0
-12.0
-12.0
-12.0
-12.0
-12.0
1
1
0
/10
500
/12
999
12.0
12.0
12.0
12.0
12.0
12.0
12.0
12.0
15
15
1
0.01 Vdc
0.01 Vdc
bar
bar
°C/°F
°C/°F
°C/°F
°C/bar/°F
°C/°F
°C/°F
°C/°F
°C/bar/°F
Flag
1
1
1
1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
1
1
1
50
450
0
345
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
4
8
0
P
P
P
P
X
X
X
X
-
18 (R/W)
19 (R/W)
1 (R/W)
2 (R/W)
3 (R/W)
4 (R/W)
5 (R/W)
6 (R/W)
7 (R/W)
8 (R/W)
9 (R/W)
10 (R/W)
20 (R/W)
21 (R/W)
5 (R/W)
225
226
1
2
3
4
5
6
7
8
9
10
227
228
5
Integer
Integer
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Integer
Integer
Digital
Table. 4.b
14
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
display
indicat.
A01
A02
A03
A05
A06
A07
A08
A08
A09
A10
A11
A11
A14
parameter and description
default
level
Alarm set point antifreeze/low ambient temperature (air/air)
U
Differential for antifreeze/low ambient temperature alarm (air/air)
U
Bypass time for antifreeze alarm/low ambient temp. when turning on the unit U
in heating mode
Diff. for antifreeze heater/auxiliary heater
U
Auxiliary heater probe
F
0= Control probe see (see Table 5.a)
1= Antifreeze probe see (see Table 5.a)
Antifreeze alarm set point limit
F
Auxiliary heater set point in heating mode
U
Antifreeze/support heater set point differential
U
Auxiliary heater differential in heating mode
U
Antifreeze automatic start up
U
0= disabled function
1= Heaters and pump on at the same time on A4/A8
2= Heaters and pump on indipendently on A4/A8
3= Heaters ON on A4/A8
Auxiliary heater 2 set point in heating
U
Support heater 2 differential in heating
U
Antifreeze alarm set point from EVD
U
min.
max.
A04
1220
150
UOM variat. default visibility supervis.
variable
°C/°F 0.1
30
11 (R/W)
°C °F 0.1
50
12 (R/W)
s
1
0
22 (R/W)
Modbus variable
type
11
Analog
12
Analog
229
Integer
A07
3
0
3
0
500
1
°C/°F
Flag
0.1
1
10
0
-
14 (R/W)
6 (R/W)
14
6
Analog
Digital
-400
A01
0
3
0
1760
r16
200
500
3
°C °F
°C °F
°C °F
°C/°F
0.1
0.1
0.1
0.1
1
-400
250
70
30
0
AA
AR
-
15 (R/W)
16 (R/W)
78 (R/W)
17 (R/W)
23 (R/W)
15
16
78
17
230
Analog
Analog
Analog
Analog
Integer
A01
0
A07
r16
200
A04
°C/°F
°C/°F
°C/°F
0.1
0.1
0.1
250
70
30
AA
AR
-
67 (R/W)
79 (R/W)
82 (R/W)
67
79
82
Analog
Analog
Analog
Table 4.c
4.3.4 Probe reading parameters (b*)
display
indicat.
b00
b01
b02
b03
b04
b05
b06
b07
b08
b09
b10
b11
b12
b13
b14
b15
b16
b17
b18
b19
b20
parameter and description
Config. of probe to be shown on the display
0= probe B1
1= probe B2
2= probe B3
3= probe B4
4= probe B5
5= probe B6
6= probe B7
7= probe B8
8= set point without compensation
9= dynamic set point with possible compensation
10= remote ON/OFF digital input status
11= µAD probe
Value read by probe B1
Value read by probe B2
Value read by probe B3
Value read by probe B4
Value read by probe B5
Value read by probe B6
Value read by probe B7
Value read by probe B8
Driver 1 evaporator temperature
Driver 1 evaporator pressure
Driver 1 superheating
Driver 1 saturation temperature
Driver 1 valve position
Driver 2 evaporator temperature
Driver 2 evaporator pressure
Driver 2 superheating
Driver 2 saturation temperature
Driver 2 valve position
Temp. probe at the outlet of the external coil c1
Temp. probe at the outlet of the external coil c12
default
level
U
min.
max.
U.O.M.
variat.
default
0
visibility supervis. Modbus
variable
24 (R/W) 231
variable
type
integer
0
11
N
1
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1000
0
0
0
0
1000
0
0
°C /°F
°C /°F
°C /°F
°C /°F/Dbar
°C /°F
°C /°F
°C /°F
°C /°F/Dbar
°C /°F
Dbar
°C /°F
°C /°F
%
°C /°F
Dbar
°C /°F
°C /°F
%
°C /°F
°C /°F
-
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
X
X
X
X
V
V
V
V
V
XV
XV
XV
XV
XV
V
XV
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
102 (R)
103 (R)
104 (R)
105 (R)
106 (R)
107 (R)
108 (R)
109 (R)
110 (R)
111 (R)
112 (R)
113 (R)
114 (R)
115 (R)
116 (R)
117 (R)
118 (R)
119 (R)
120 (R)
121 (R)
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
Table 4.d
4.3.5 Compressor setting parameters (c*)
display
indicat.
c01
c02
c03
c04
c05
c06
c07
c08
c09
c10
c11
c12
c13
c14
c15
c16
c17
c18
parameter and description
default
level
Minimum on time
U
Minimum off time
U
Delay between 2 starts of the same compressor
U
Delay between starts of the 2 compressors
U
Delay between 2 shut-downs of the 2 compressors
U
Delay at start-up
U
Delay in switching on the compressor after switching on the pump/inlet U
fan (air/air)
Delay in switching OFF the compressor after switching OFF the pump/ U
inlet fan (air/air)
Maximum compressor operating time in tandem
U
Compressor 1 timer
D
Compressor 2 timer
D
Compressor 3 timer
D
Compressor 4 timer
D
Operation timer threshold
U
Hour counter evaporator pump/fan 1
D
Hour counter condenser backup pump/fan 2
D
Minimum time between 2 pump starts
U
Minimum pump ON time
U
min. max.
U.O.M.
variat. def.
visib.
Modbus
-
supervis.
variable
25 (R/W)
26 (R/W)
27 (R/W)
28 (R/W)
29 (R/W)
30 (R/W)
31 (R/W)
232
233
234
235
236
237
238
variabile
type
Integer
Integer
Integer
Integer
Integer
Integer
Integer
0
0
0
0
0
0
0
999
999
999
999
999
999
999
s
s
s
s
s
s
s
1
1
1
1
1
1
1
60
60
360
10
0
0
20
0
150
min
1
1
-
32 (R/W)
239
Integer
0
0
0
0
0
0
0
0
0
0
60
8000
8000
8000
8000
100
8000
8000
150
15
min
100 hours
100 hours
100 hours
100 hours
100 hours
100 hours
100 hours
min
min
1
1
1
1
0
0
0
0
0
0
0
0
30
3
-
33 (R/W)
122 (R)
123 (R)
124 (R)
125 (R)
34 (R/W)
126 (R)
127 (R)
35 (R/W)
36 (R/W)
240
122
123
124
125
241
126
127
242
243
Integer
Analog
Analog
Analog
Analog
Integer
Analog
Analog
Integer
Integer
Table 4.e
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
15
ENGLISH
4.3.3 Antifreeze/support heater setting parameters (A*)
ENGLISH
4.3.7 Fan setting parameters (F*)
display parameter and description
indicat.
F01
Enable Fan output
0=not present
1=present
F02
Fan operating mode
0= always ON
1= depending ON the compressor (in parallel operation mode)
2= depending ON the compressors in ON/OFF control
3= depending ON the compressors in speed control mode
F03
Min. voltage threshold for Triac
F04
Max. voltage threshold for Triac
F05
Speed temp. set point in Cooling mode
Pressure value for min. speed Cooling
F06
Differential value for max. speed Cooling
Pressure value for max. speed Cooling
F07
Fan shut-down differential in Cooling mode
Fan shut-down pressure in Cooling mode
F12
Triac impulse duration (fan start)
F14
Fan with high condensing temperature when starting
F15
Low noise activation
0= deactivated
1= activated in cooling
F16
Low noise diff. in cooling
default
level
F
min.
max.
U.O.M. variat.
def.
0
visibility supervis.
variable
10 (R/W)
0
1
Flag
1
U
0
3
Int
F
F
U
U
U
U
U
U
F
U
U
0
F03
-400
/11
0
0
0
0
0
0
0
F04
100
1760
/12
500
300
500
F05
10
999
1
step
step
°C/°F
Dbar
°C/°F
Dbar
°C/°F
Dbar
s
-
F
0
500
°C/°F/bar 0.1
Modbus
10
variable
type
Digital
1
0
F
48 (R/W)
255
Integer
1
1
0.1
0.1
0.1
0.1
0.1
0.1
1
1
1
35
75
350
130
100
30
150
50
2
0
0
F
F
FN
FP
FN
FP
FN
FP
F
FN
F
49 (R/W)
50 (R/W)
24 (R/W)
23 (R/W)
26 (R/W)
25 (R/W)
28 (R/W)
27 (R/W)
52 (R/W)
91 (R/W)
85 (R/W)
256
257
24
23
26
25
28
27
259
298
292
Integer
Integer
Analog
Analog
Analog
Analog
Analog
Analog
Integer
Integer
Integer
0
L
35 (R/W)
35
Analog
Table 4.g
4.3.8 Unit setting parameters (H*)
display parameter and description
indicat.
H01
Unit model
2= air_water chiller
4= water_water chiller
H02
Number of condensers
0=1 circuit; 1=2 circuits
H03
Number of evaporators
0=1 evaporator; 1=2 evaporators
H04
Number of compressors per circuit
0=1 comp. ON 1 circuit (single circuit)
1=2 comp. in tandem ON 1 circuit (single circuit)
2=1 comp. per circuit, 2 circuits (two circuits)
3=2 comp. in Tandem, 2 circuits (two circuits)
4=1 compressor and 1 Capacity step in one circuit
5=1 compressor and 1 capacity Step per circuit
H05
Pump/outlet fan (Air/Air) mode (output N2)
0= absent
1= always ON
2= ON upon request of the controller
3= ON upon request of the controller and for set time
H06
Cooling/Heating digital input
0= absent; 1= present
H07
ON/OFF digital input
0= absent; 1= present
H08
µC2 network configuration
0= µC2SE only
1= µC2SE + EVD
2= µC2SE + exp.
3= µC2SE + exp. + EVD
4= µC2SE + I/O
5= µC2SE + EVD + I/O
6= µC2SE + exp. + I/O
7= µC2SE + I/O + EVD + exp.
H09
Lock keypad
0= disabled; 1= enabled
H10
Serial address
0= use as terminal
H11
Output modes (see Table 5.3 and following pag. 56)
H12
Capacity-control and reversing valve logic
0= Both normally closed
1= Both normally open
2= Inversion valve normally open and capacity-control valve normally closed
3= Inversion valve normally closed and capacity-control valve normally open
H13
Activate pump down
H14
Minimum pump down pressure
H15
Maximum pump down time
H21
Second pump function
0= Disabled
1= Backup and weekly rotation
2= Backup and daily rotation
3= Condensing control on corresponding set point
4= Condensing control always on
16
default
level
F
min.
max.
U.O.M. variat.
def.
2
visibility supervis.
variable
54 (R/W)
2
4
Flag
2
U
0
1
Flag
F
0
1
F
0
F
Modbus
261
variable
type
Integer
1
0
-
12 (R/W)
12
Digital
Flag
1
0
-
13 (R/W)
13
Digital
5
Flag
1
0
-
55 (R/W)
262
Integer
0
3
Flag
1
1
-
56 (R/W)
263
Integer
U
0
1
Flag
1
0
-
14 (R/W)
14
Digital
U
0
1
Flag
1
0
-
15 (R/W)
15
Digital
F
0
7
Flag
1
4
-
57 (R/W)
264
Integer
U
0
1
Flag
1
1
-
16 (R/W)
16
Digital
U
1
200
-
-
1
-
58 (R/W)
265
Integer
F
F
0
0
12
3
Int
Flag
1
1
0
1
-
59 (R/W)
60 (R/W)
266
267
Integer
Integer
F
F
F
F
0
0
0
0
1
500
180
4
Dbar
s
int
1
0.1
1
1
0
20
30
0
V
M
M
-
17 (R/W)
37(R/W)
61 (R/W)
62 (R/W)
17
37
268
269
Digital
Analog
Integer
Integer
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
default
level
F
min.
max.
U.O.M. variat.
def.
0
visibility supervis.
variable
18 (R/W)
0
1
Flag
1
F
F
0
0
1
3
Flag
Flag
F
0
1
F
0
1
Modbus
18
variable
type
Digital
1
1
0
0
-
11 (R/W)
124 (R/W)
11
331
Digital
Integer
Flag
1
0
-
25 (R/W)
25
Digital
Flag
1
0
-
26 (R/W)
26
Digital
4.3.9 Firmware parameters (F-r*)
display
indicat.
H99
H98
H97
H96
H95
parameter and description
Software version, Driver 2
Software version, Driver 1
Expansion software version
Software version (displayed when powering up the
instrument)
I/O board software version
default
level
D
D
D
D
min.
max.
U.O.M. variat.
default
visibility
Modbus
variable type
X
V
XV
supervis.
variable
1 (R)
2 (R)
3 (R)
4 (R)
0
0
0
0
999
999
999
999
Int
Int
Int
Int
-
14
0
0
0
208
209
210
211
Integer
Integer
Integer
Integer
D
0
999
Int
-
0
-
149 (R)
356
Integer
Table 4.i
4.3.10 Alarm setting parameters (P*)
display
indicat.
P01
P02
P03
P04
P05
P07
P08
P09
P10
P11
P12
P13
P14
P15
P16
P17
P18
P19
P20
P21
P22
P23
P24
P25
P26
P27
P28
P29
P30
P31
P32
parameter and description
Flow switch alarm delay when starting the pump
Flow switch alarm delay during steady operation
Low pressure alarm delay at compressor start-up
Enable compressor capacity-control with high pressure
0= capacity control deactivated
1= capacity-control with high pressure active
2= capacity-control with low pressure active
3= capacity-control with high and low pressure active
Alarm reset
0= HP1-2/LP1-2/A1-2/Lt manual
1= HP1-2/LP1-2/A1-2/Lt automatic
2= HP1-2/A1-2/Lt manual LP1-2 automatic
3= HP1-2 manual LP1-2/A1-2/Lt automatic
4= HP1-2/LP1-2 manual A1-2/Lt automatic
5= HP1-2/LP1-2 (thrice per hour) manual A1-2/Lt automatic
6= HP1-2/LP1-2 (thrice per hour) manual; A1-2/Lt manual
Low pressure alarm with pressure probe: 0= Disabled; 1= Enabled
Digital input 1 selection
0= N
1=FL man. 2=FL auto.
3=TP man.
4=TP auto 5= TC1 man. 6= TC1 auto.
7= TC2 man.
8= TC2 auto. 9= Cool/heat 10= Cool/heat with
11= LA man.
delay
12= LA auto. 13= 2° Set 14= 2° Set timer
15= stop defrost c.1
16= stop
17= start
18= start defrost c.2
19= step 1
defrost c.2 defrost c.1
20 = step 2 21= step 3 22= step 4
23= remote ON/OFF
Digital input 2 selection
Digital input 6 selection
Digital input 7 selection
Digital input 10 selection
Configuration of B4 as P8 if /4=1 (digital input)
Configuration of B8 as /8=1 (digital input)
Select low pressure alarm
0= not active with compressor OFF
1= active with compressor OFF
High temperature alarm set
High temperature alarm delay at start-up
High pressure alarm set from transducer
System low temperature alarm set point
Enable system start-up protection: 0= Disabled; 1= Enabled
Alarm relay output logic: 0= normally de-activated; 1= normally activated
Low pressure alarm delay at start-up
Compressor in heat pump
Low pressure alarm delay at compressor start-up in defrost
Deactivate compressors with HP and LP capacity-control
Select digital output 2
Select digital output 3
Select digital output 4
Select digital output 5
Select digital output 7
Select digital output 8
Select digital output 9
Select digital output 10
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
default
level
U
U
U
U
min.
max.
U.O.M. variat. def.
20
5
40
0
visibility supervis.
variable
63 (R/W)
64 (R/W)
65 (R/W)
P
66 (R/W)
Modbus variable
type
270
Integer
271
Integer
272
Integer
273
Integer
0
0
0
0
150
120
200
3
s
s
s
Flag
1
1
1
1
F
0
6
Flag
1
0
-
67 (R/W)
274
Integer
F
F
0
0
1
23
Flag
Int
1
1
0
0
P
-
68 (R/W)
69 (R/W)
275
276
Integer
Integer
F
F
F
F
F
F
F
0
0
0
0
0
0
0
23
23
23
23
23
23
1
Int
Int
Int
Int
Int
Int
Flag
1
1
1
1
1
1
1
0
0
0
0
0
0
0
X
X
X
X
-
70 (R/W)
71 (R/W)
72 (R/W)
73 (R/W)
74 (R/W)
75 (R/W)
76 (R/W)
277
278
279
280
281
282
283
Integer
Integer
Integer
Integer
Integer
Integer
Integer
U
U
F
U
U
F
U
-400
0
P33
-400
0
0
0
1760
250
999
1760
1
1
200
°C/°F
s
Dbar
°C/°F
Flag
s
0.1
1
0.1
0.1
1
1
1
280
30
200
100
0
0
40
AA
P
AA
-
38 (R/W)
77 (R/W)
39 (R/W)
40 (R/W)
20 (R/W)
8 (R/W)
86 (R/W)
38
284
39
40
20
8
293
Analog
Integer
Analog
Analog
Digital
Digital
Integer
U
D
F
F
F
F
F
F
F
F
0
0
0
0
0
0
0
0
0
0
999
1
11
11
11
11
12
12
12
12
s
Int
Int
Int
Int
Int
Int
Int
Int
1
1
1
1
1
1
1
1
1
1
40
0
0
0
0
0
0
0
0
0
P
X
X
X
X
87 (R/W)
21 (R/W)
108 (R/W)
109 (R/W)
110 (R/W)
111 (R/W)
112 (R/W)
113 (R/W)
114 (R/W)
115 (R/W)
294
21
315
316
317
318
319
320
321
322
Integer
Digital
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
17
ENGLISH
display parameter and description
indicat.
H22
Disable load default values
0= Function disabled
1= Function enabled
H23
Enable Modbus®
H24
Set the mode of high temperature alarm
0= no stop
1= high temperature stops compressor
2= low temperature stops compressor
3= high and low temperature stops
H25
Hot as bypass function enable
0= disable; 1= enable
H26
Special stand by mode enable
0= disable; 1= enable
Table 4.h
ENGLISH
display
indicat.
P33
P34
P35
P36
P37
P38
P39
P40
P41
P42
P43
P44
P45
P46
parameter and description
Low pressure alarm threshold
Select digital input 5
Mute alarm with “mute“ button: 0= no; 1= yes
Type of high pressure alarm management
0= always; 1= only if compressor active and 2 s after activation
Select digital input 11
Select digital input 12
Select digital input 13
Select digital input 14
Select digital input 15
Select digital output 11
Select digital output 12
Select digital output 13
Select digital output 14
Select digital output 15
default
level
F
F
F
F
min.
max.
U.O.M. variat. def.
10
23
0
0
visibility supervis.
variable
P
76 (R/W)
122 (R/W)
23 (R/W)
24 (R/W)
Modbus variable
type
76
Analog
329
Integer
23
Digital
24
Digital
0
0
0
0
P18
23
1
1
Dbar
Int
-
0.1
1
1
1
F
F
F
F
F
F
F
F
F
F
0
0
0
0
0
0
0
0
0
0
10
10
10
10
10
18
18
18
18
18
Int
Int
Int
Int
Int
Int
Int
Int
Int
Int
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
-
345
346
347
348
349
350
351
352
353
354
138 (R/W)
139 (R/W)
140 (R/W)
141 (R/W)
142 (R/W)
143 (R/W)
144(R/W)
145 (R/W)
146 (R/W)
147 (R/W)
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Table 4.i
4.3.11 Control setting parameters (r*)
display
indicat.
r01
r02
r05
r06
r07
r08
r09
r10
r11
r12
r13
r14
r17
r18
r19
r20
r21
r25
r27
r28
r29
r30
r43
r45
r46
r47
r48
parameter and description
Cooling set point
Cooling differential
Compressor rotation
0= disabled;
1= FIFO type
2= con controllo ore/hour control
3= direct relation between (D.I. and compressors D.O.)
Type of compressor control
0= proportional on inlet
1= proportional on inlet + dead zone
2= proportional on outlet
3= proportional on outlet + dead zone
4= time on outlet with dead zone
Dead zone differential
Maximum control output activation time
Minimum control output activation time
Maximum control output deactivation time
Minimum control output deactivation time
Compressor deactivation differential
Minimum set point in Cooling
Max. Cooling set point
Cooling compensation constant
Maximum distance from the set point
Start compensation temperature in cooling mode
Start compensation temperature in heating mode
Second cooling set point from external contact
Outside temp set point to stop compressors
Enable accumulation vessel suppression
0= Disabled
1= Enabled in cool
2= Enabled in Heat
3= Always enabled
Min. compressor running time for low load/damper travel time
Chiller low load differential/freecooling differential
Heat pump low load differential/freeheating differential
Heater set point
0= A4, A8, A11, P16, P19 absolute values
1= A4, P16, P19 absolute value, A8 and A11 relative values
2= A8, A11, P16, P19 absolute values, A4 relative value
3= P16, P19 absolute values; A4, A8, A11 relative values
4= A4, A8, A11 absolute values; P16, P19 relative values
5= A4 absolute value, A8, A11, P16, P19 relative values
6= A8, A11 absolute values; A4, P16, P19 relative values
7= A4, A8, A11, P16, P19 relative values
Maximum value of calculated set point in relative regulation
Minimum value of calculated set point in relative regulation
Set point for relative regulation
Differential for relative regulation
default
level
D
D
F
min.
max.
U.O.M. variat. def.
r13
1
0
r14
500
3
°C/°F
°C/°F
Flag
0.1
0.1
1
12.0
30
0
visibility supervis.
variable
41 (R/W)
42 (R/W)
78 (R/W)
Modbus variable
type
41
Analog
42
Analog
285
Integer
F
0
4
Flag
1
0
-
79 (R/W) 286
Integer
F
F
F
F
F
F
U
U
U
U
U
U
D
D
F
1
0
0
0
0
0
-400
r13
-50
3
-400
-400
r13
-400
0
500
999
999
999
999
500
r14
1760
50
200
1760
1760
r14
800
3
°C/°F
s
s
s
s
°C/°F
°C/°F
°C/°F
°C/°F
°C/°F
°C/°F
°C/°F
°C/°F
Flag
0.1
1
1
1
1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
1
20
120
100
120
100
20
-400
800
0
3
300
0
120
-400
0
-
45 (R/W)
80 (R/W)
81 (R/W)
82 (R/W)
83 (R/W)
46 (R/W)
47 (R/W)
48 (R/W)
51 (R/W)
52 (R/W)
53 (R/W)
54 (R/W)
55 (R/W)
65 (R/W)
88 (R/W)
45
287
288
289
290
46
47
48
51
52
53
54
55
65
295
Analog
Integer
Integer
Integer
Integer
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Integer
F
F
F
F
0
10
10
0
999
500
500
7
s
°C/°F
°C/°F
-
1
0.1
0.1
1
60
30
30
7
-
89 (R/W)
58 (R/W)
59 (R/W)
121 (R/W)
296
58
59
328
Integer
Analog
Analog
Integer
D
F
D
F
r46
-400
-400
0
1760
r45
1760
500
°C/°F
°C/°F
°C/°F
°C/°F
0.1
0.1
0.1
0.1
300
100
30
10
-
84 (R/W)
85 (R/W)
86 (R/W)
87 (R/W)
84
85
86
87
Analog
Analog
Analog
Analog
Table 4.k
18
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
display
indicat.
t01
t02
t03
t04
t05
t06
t07
t08
t09
t13
t14
t15
t16
t17
parameter and description
RTC hours
RTC minutes
RTC day
RTC month
RTC year
Start hours for 2nd set point in cooling
Start minutes for 2nd set point in cooling
End hours for 2nd set point in cooling
End minutes for 2nd set point in cooling
End minutes for 2nd set point in heating
Start hours for 2nd low-noise in cooling
Start minutes for 2nd low-noise in cooling
End hours for 2nd low-noise in cooling
End minutes for 2nd low-noise in cooling
default
level
U
U
U
U
U
U
U
U
U
U
U
U
U
U
min.
max.
U.M.
variat.
def.
0
0
1
1
0
0
0
0
0
0
0
0
0
0
23
59
31
12
99
23
59
23
59
59
23
59
23
59
h
min
g
mesi
anni
h
min
h
min
min
h
min
h
min
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
1
1
6
0
0
0
0
0
23
0
7
0
visibility supervis.
variable
W
129(R/W)
W
130 (R/W)
W
131 (R/W)
W
132 (R/W)
W
133 (R/W)
W
92 (R/W)
W
93 (R/W)
W
94 (R/W)
W
95 (R/W)
W
99 (R/W)
W
100 (R/W)
W
101 (R/W)
W
102 (R/W)
W
103 (R/W)
Modbus
variabile type
336
337
338
339
340
299
300
301
302
306
307
308
309
310
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Table 4.l
4.3.13 Supervisor-only variables
display
indicat.
-
parameter and description
Show machine parameters (communication & SV CAREL)
Circuit 1 alarm
Circuit 2 alarm
EVD valve 1 alarm
EVD valve 2 alarm
General alarm
Probe alarm
Compressor warning
EVD 1 warning
EVD 2 warning
General warning
Temperature warning
Fan warning
DTE/DTC alarm
Digital input 1
Digital input 2
Digital input 3
Digital input 4
Digital input 5
Digital input B4
Digital input 1
Digital input 2
Digital input 3
Digital input 4
Digital input 5
Standby/On status
0= Standby
1= On
Heating/Cooling status:
0= Heating
1= Cooling
Gain constant for probe 1 calibration
Gain constant for probe 2 calibration
Gain constant for probe 3 calibration
Gain constant for probe 4 calibration
Offset constant for pressure probe calibration
Offset constant for probe 1 calibration
Offset constant for probe 2 calibration
Offset constant for probe 3 calibration
Offset constant for probe 4 calibration
Gain constant for pressure probe calibration
Compressor 1 operating hours
Compressor 2 operating hours
Compressor 3 operating hours
Compressor 4 operating hours
Compressor pump operating hours
Evaporator pump operating hours
Digital input 6
Digital input 7
Digital input 8
Digital input 9
Digital input 10
Digital input B8
Digital output 6
Digital output 7
Digital output 8
Digital output 9
Digital output 10
Digital input 11
Digital input 12
Digital input 13
Digital input 14
Digital input 15
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
default
level
F
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
min. max. U.O.M
variat.
def.
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
250
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
167
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
D
0
1
1
1
65 (R/W)
65
Digital
F
F
F
F
F
F
F
F
F
F
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
0
0
0
0
0
-8000
-8000
-8000
-8000
-8000
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
8000
8000
8000
8000
16000
8000
8000
8000
8000
8000
8000
8000
8000
8000
8000
8000
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
-
1000
1000
1000
1000
1000
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
5 (R)
6 (R)
7 (R)
8 (R)
150 (R)
9 (R)
10 (R)
11 (R)
12 (R)
151 (R)
152 (R)
153 (R)
154 (R)
155 (R)
156 (R)
157 (R)
66 (R)
67 (R)
68 (R)
69 (R)
70 (R)
71 (R)
72 (R/W)
73 (R/W)
74 (R/W)
75 (R/W)
76 (R/W)
80 (R)
81 (R)
82 (R)
83 (R)
84 (R)
212
213
214
215
357
216
217
218
219
358
359
360
361
362
363
364
66
67
68
69
70
71
72
73
74
75
76
80
81
82
83
84
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Integer
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
19
visibility supervis.
variable
148 (R)
41 (R)
42 (R)
43 (R)
44 (R)
45 (R)
46 (R)
47 (R)
48 (R)
49 (R)
50 (R)
51 (R)
52 (R)
77 (R)
53 (R)
54 (R)
55 (R)
56 (R)
57 (R)
58 (R)
59 (R/W)
60 (R/W)
61 (R/W)
62 (R/W)
63 (R/W)
64 (R/W)
Modbus variable
type
355
Integer
41
Digital
42
Digital
43
Digital
44
Digital
45
Digital
46
Digital
47
Digital
48
Digital
49
Digital
50
Digital
51
Digital
52
Digital
77
Digital
53
Digital
54
Digital
55
Digital
56
Digital
57
Digital
58
Digital
59
Digital
60
Digital
61
Digital
62
Digital
63
Digital
64
Digital
ENGLISH
4.3.12 Timer setting parameters (t*)
ENGLISH
4.3.13 Supervisor-only variables
display
indicat.
-
-
-
-
parameter and description
Digital input B12
Digital output 11
Digital output 12
Digital output 13
Digital output 14
Digital output 15
Password to control outputs from the supervisor
Defrost status
bit 0= Defrost circuit 1
bit 1= Defrost circuit 2
bit 2= Fan Defrost circuit 1
bit 3= Fan Defrost circuit 2
Controls from the UAD:
bit0= terminal status (0= not connected; 1= available)
bit2; bit1= mode set from µAD (00= AUTO; 01= cooling; 10=
heating)
bit3= enable dehumidification
bit4= enable humidification
bit5= terminal probe alarm
bit6= activate boiler output
bit7= 0= process mode active; 1= process mode disabled
Signals to the µAD
bit0= cool/heat request from uAD in progress
bit1= cool/heat request accepted from µAD (1= cooling; 0=
heating)
bit2= start fans
bit3= alarm active on µCH
bit4= RTC available on µCH2 SE
DTE value saved in EEPROM
Internal set point compensated in the event of autotuning
Ambient set point (from µAD)
Set point variation from µAM (µedronic)
Differential for the ambient set point
Controls by the µAD from save
Active alarm signal:
bit0= probe alarm (E1,E2,E,E4,E5,E6,E7,E8)
bit1= high pressure alarm (HP1, HP2)
bit2= low pressure alarm (LP1, LP2)
bit3= flow switch alarm (FL)
bit4= expansion communication alarm (ESP)
bit5= EE2PROM alarm (EPB)
bit6= antifreeze alarm (A1, A2)
bit7= thermal overload alarm (TP, TP1, TP2)
bit8= hour counter alarm (H1, H2, H, H4)”
Terminal humidity probe (per terminal µAD)
Reset alarms
Digital input B
Compatibility with the test
Dummy digital
Dummy integer
Dummy analog
default
level
D
D
D
D
D
D
D
D
min. max. U.O.M
variat.
def.
0
0
0
0
0
0
0
0
1
1
1
1
1
1
8000
255
1
1
1
1
1
1
-
0
0
0
0
0
0
0
0
visibility supervis.
variable
85 (R)
86 (R/W)
87 (R/W)
88 (R/W)
89 (R/W)
90 (R/W)
13 (R/W)
134 (R)
D
0
1023
1
0
135 (R/W)
342
Integer
D
0
255
-
0
136 (R)
343
Integer
D
D
D
D
D
D
D
0
0
-400
-100
-100
0
0
0
0
1760
100
100
32767
32767
0,1
0,1
0,1
1
1
0
0
0
0
0
0
0
98 (R)
97 (R)
95 (R/W)
96 (R/W)
94 (R/W)
137 (R/W)
128 (R/W)
98
97
95
96
94
344
335
Analog
Analog
Analog
Analog
Analog
Integer
Integer
D
D
D
F
F
F
F
0
0
0
0
0
0
0
1000 %
1
1
1
0
0
0
0,1
1
1
-
0
0
0
0
0
0
0
129 (R/W)
78 (R/W)
79 (R)
19 (R/W)
22 (R)
123 (R/W)
133 (R)
129
78
79
19
22
330
133
Analog
Digital
Digital
Digital
Digital
Integer
Analog
-
Modbus variable
type
85
Digital
86
Digital
87
Digital
88
Digital
89
Digital
90
Digital
220
Integer
341
Integer
Table 4.m
20
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
ENGLISH
5. DESCRIPTION OF THE PARAMETERS
To modify the parameters, see chapter 4 “Parameters.”
• Probe settings: parameters (/*) (see Table 4.a)
- Type of probe: from /01 to /08: enables the reading of the corresponding analogue input or sets the
function
• Functions of the probes
Type of unit Parameter H01
Temp. control
probe
1st circuit
2= air/water Chiller
B1/B2 single circuit
(B1/B5 two circuits)
4= water/water Chiller
B1/B2 single circuit
(B1/B5 two circuits)
11= Cooling-only air-air unit with electric heating B1
Antifreeze probe Cond. temp. Press probe
1st circuit
probe
1st circuit
2nd evaporator
B2
B3
B4
Antifreeze
probe
2nd circuit
B6
Cond. temp.
probe
Press. probe
2nd circuit
B7
B8
B2
Not used
Not used
B6
Not used
Not used
B2 (low outlet
temperature)
B3
B4
Not used
B7
B8
Table 5.a
- Min/max voltage and pressure values
From /09 to /12: sets the minimum/maximum voltage and pressure for the ratiometric signal.
- Probe calibration
From /13 to /20: calibrates the corresponding sensor (from B1 to B8).
- Digital filter
/21: Establishes the coefficient used in the digital filtering of the value measured. High values for this
parameter will eliminate any continuous disturbance at the analogue inputs (however decrease the
promptness of measurement). The recommended value is 4 (default).
- Input limit
/22: Establishes the maximum variation that can be measured by the probes in one unit program cycle;
in practice, the maximum variations allowed in the measurement are between 0. 1 and 1.5 units (bars, °C
or °F, depending on the probe and the unit of measure) approximately every one second. Low values for
this parameter will limit the effect of impulsive disturbance. Recommended value 8 (default).
- Unit of measure
/23: Selects the unit of measure as degrees centigrade or Fahrenheit. When the parameter is modified,
the µC2SE automatically converts the values read by the NTC temperature probes B1, B2, B3 into the new
unit of measure; while all the other parameters set (set point, differential etc. ) remain unchanged.
Example of antifreeze/outlet limit management
• Antifreeze, auxiliary heater: parameters (A*)
1
- Antifreeze alarm set point
A01: when probe B2 is installed on the coil represents the temperature (antifreeze set point) of the water
at the evaporator outlet below which an antifreeze alarm is activated; in this condition the compressors
corresponding to the circuit in question are stopped, while the pump remains on to decrease the
possibility of freezing. The alarm is reset manually (or automatically, depending on parameter P05) only
when the water temperature returns within the operating limits (that is, above A01+A02).
ON
OFF
A1
A1+A2
2
Fig. 5.a.a
- Antifreeze alarm differential
A02: This represents the differential for the activation of the antifreeze alarm; the alarm condition cannot
be reset until the temperature exceeds the set point + differential (A01+A02 or A14+A02).
Key:
1. freecooling or comp
- Antifreeze alarm bypass time low room temperature from unit start in heating mode
A03: This represents the delay in the activation of the antifreeze alarm when starting the system.
- Auxiliary heater probe in heating
A06: This determines which probe is used for control the auxiliary heater. The meaning of the parameter
is the following:
A06 = 0 => Control probe see Table 5.a.a
A06 = 1 => Antifreeze probe see Table 5.a.a
Not valid if A10= 2
- Antifreeze alarm set point limit
A07: Establishes the minimum limit for setting the antifreeze alarm set point (A01).
- Heating (electrical heater or hot gas bypass) set point
A08: Represents the threshold below which the heating function is activated.
The set point in heating is compensated according to the following equation:
The heating function could be realized by electrical heater or hot gas bypass valve. The set point in
heating is compensated according to the following equation:
Set_heaters (heating) = A08 + (Compensated set point - Set point set)
A08 could both be absolute value or relative value to set point according to the parameter r43.
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
21
2. probe B2
ENGLISH
- Heating differential
A09: Represents the differential for the activation/deactivation of the heating function
- Automatic switch-on
A10: This parameter is valid when the unit is in standby.
The operating mode switchover delay times are ignored.
A10=0: function not enabled
A10=1: heating function and pump are ON at the same time when the temperature is below A04
A10=2: heating function and compressor are ON at the same time when the temperature is below A04
(use for hot gas bypass)
A10=3: heating function automatically switches on whne the temperature is below A04
In this case, the display will be as follows:
• operating mode LED OFF;
• cooling heating flag not switched (not detected by the supervisor);
• antifreeze alarm A01 (remains active even at the end of the special operation if the unit was previously
ON, deactivated by manual reset or in standby).
A10=3: heaters ON based on the respective set point A04 and A08.
Do not use with H1= 6
- Antifreeze heater 2 set point in defrost/auxiliary in heating
A11: Heater 2 set point in heating, the control of the auxiliary heaters has been separated, each having its
own activation set point (see A08).
- Dirty filter signal set point (air/air units only)
A12: Set point for the dirty filter signal based on B1-B2, the deactivation differential is A05
• Valid in the following conditions:
• air-air units;
• B1 is configured;
• outlet limit active;
• freecooling not active;
• at least 1 compressor ON.
The warning is reset automatically in the following conditions:
• air-air units;
• B1 is configured;
• outlet limit active;
• freecooling not active.
- Outlet limit set point in freecooling conditions
A13: With freecooling active, and only when the compressors are off, this represents the outlet limit.
When the compressors are on, even if freecooling is active, the outlet limit alarm is bypassed and the
antifreeze alarm is used.
- Antifreeze alarm set point from EVD
A14: With the EVD connected in the tLAN, A14 represents the evaporation temperature (sent by the EVD)
below which the antifreeze alarm is activated; when the alarm is active, the compressors in the circuit
affected are switched off, while the pump remains on to reduce the possibility of freezing. Manual reset
(or automatic, depending on parameter P05), only occurs when the water temperature returns within the
operating limits (that it, exceeds A14+A02
• Probe readings: parameters (B*)
- Select probe to be shown on display.
b00: Sets the probe reading to be displayed.
0= probe B1
1= probe B2
2= probe B3
3= probe B4
4= probe B5
5= probe B6
6= probe B7
7= probe B8
8= set point without compensation
9= dynamic set point with possible compensation
10= remote ON/OFF digital input status
11= probe AD
For the list of parameter-probe associations see Table 4.d
Note: probes that are not present cannot be selected.
22
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
• Compressor settings: parameters (c*)
- Minimum ON time
c01: This establishes the time that the compressor must remain ON for when started, even if the stop
signal is sent.
Key:
ON
t
OFF
ON
2
1. signal;
2. compressor;
3. min. ON time-interval.
C2
t
OFF
3
Fig. 5.a.c
- Minimum OFF time
c02: This establishes the time that the compressor must remain OFF for when stopped, even if the start
signal is sent. The compressor LED flashes in this phase.
ON
1
Key:
t
OFF
ON
1. signal;
2. compressor;
3. min. OFF time-interval.
2
t
C2
OFF
3
- Delay between 2 starts of the compressor
c03: This sets the minimum time that must elapse between two successive starts of the same compressor
Fig. 5.a.d
(determines the maximum number of starts per hour for the compressor). The compressor LED flashes in this
phase. If by mistake the user enters a value lower than the sum of C01 + C02, this parameter will be ignored and
only the times C01 and C02 will be considered.
ON
1
Key:
t
1. signal;
2. compressor;
3. min. time-interval between two ON routins.
OFF
ON
2
C2
OFF
t
3
Fig. 5.a.e
- Start delay between compressors
c04: This sets the delay between the starts of the two compressors, so as to reduce the peak power input
and make the compressors start more smoothly. The compressor LED flashes in this phase.
• In the event of capacity control, the delay c04 between compressor and valve becomes c04/2;
• In the event of defrost operation, the delay between compressor and compressor is 3 seconds, and
between compressor and valve is 2 seconds.
ON
1
OFF
ON
2
OFF
ON
3
Key:
1.
2.
3.
4.
5.
OFF
1st signal;
2nd signal;
1st compressore;
2nd compressor;
time delay between two compressors ON routines/time-delay of the capacity-controlled routine.
ON
4
OFF
C4
5
Fig. 5.a.f
- Stop delay between compressors
c05: This sets the stop delay between the compressors.
ON
1
OFF
ON
Key:
1.
2.
3.
4.
5.
2
2nd signal;
1st signal;
2nd compressor;
1st compressore;
time delay between two compressors OFF routines/time-delay before the capacity-controlled routine.
OFF
ON
3
OFF
ON
4
OFF
C5
- Delay on power-up (reset power supply)
c06: At power ON (when the controller is physically switched ON) the activation of all the outputs is delayed so
5
Fig. 5.a.g
as to distribute the power input and protect the compressor against repeated starts in the event of frequent power
failures. This means that after the delay time, the controller will start to manage the outputs based on the other
times and the other normal functions.
- Compressor start delay from pump/outlet fan (air/air) ON.
c07: In cooling and heating operation, if the operation of the pump (outlet fan) is subject to the controller
ON
1
(parameter H05=2), the compressor is started when required after the set time from the activation of the water
pump (or outlet fan in air/air units).
If the pump/outlet fan is always ON (H05=1) and consequently does not depend on the control logic, the
compressor is started after the set time from when the unit starts.
ON
C7
inlet fan;
pump;
compressor;
time-delay between pump-inlet fan and compressor.
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
OFF
3
Key:
1.
2.
3.
4.
t
2
4
Fig. 5.a.h
23
t
OFF
ENGLISH
1
- Pump/outlet fan (air/air) start delay from compressor OFF
c08: In cooling and heating operation, if the operation of the pump (outlet fan) is subject to the controller
ON
ENGLISH
1
t
2
ON
(parameter H05=2), when the compressor is requested to stop, the control first stops the compressor and the
pump (outlet fan).
If the pump/outlet fan is always ON (H05=1), it is only stopped in standby mode.
OFF
Key:
OFF
3
t
C8
1.
2.
3.
4.
4
Fig. 5.a.i
compressor;
pump;
inlet fan;
time-delay between pump-inlet fan and compressor.
- Maximum tandem compressor operating time
c09: In the case of two compressors in tandem per circuit, one compressor should not operate for longer than
the time set for c09 while the other compressor in the circuit is OFF. This prevents the oil shared in common
from migrating over the allowed limit towards the active compressor, and consequently avoids damage when
inactive compressor next starts (FIFO logic) due to poor lubrication. As a result, compressor 1 (or 2) in circuit 1, if
requested to operate continuously, will actually stop OFF after the time c09 and hand over to compressor 2 (or 1)
that was previously OFF.
This function always considers the compressor times. Any value lower than the time set for c03 will be ignored, and
the compressors (if the above condition is satisfied) will switch over after the time c03.
When C9=0, the function is disabled (the compressors will not switch over).
- Hour counter compressor 1-2-3-4
c10, c11, c12, c13: These indicate the number of operating hours of compressor 1, 2, 3, 4, expressed in
hundreds of hours.
Pressing  and  together, when the hour counter is displayed, resets the hour counter and,
consequently, cancels any maintenance requests in progress.
c10= operating hours comp. 1
c11= operating hours comp. 2
c12= operating hours comp. 3
c13= operating hours comp. 4
- Compressor operating hour counter threshold
c14: This sets the number of compressors operating hours, expressed in hundreds of hours, above which
the maintenance request signal is sent.
c14= 0: function disabled.
- Evaporator pump/fan 1 hour counter
c15: This indicates the number of operating hours for the evaporator
pump or fan 1, expressed in hundreds of hours.
Pressing  and  together, when the hour counter is displayed, resets the hour counter and,
consequently, cancels any maintenance requests in progress.
- Condenser or backup pump/fan 2 hour counter
c16: This indicates the number of operating hours for the condenser pump (or backup) or fan 2,
expressed in hundreds of hours.
Pressing  and  together, when the hour counter is displayed, resets the hour counter and,
consequently, cancels any maintenance requests in progress.
- Minimum OFF time before the next pump/fan start
c17: The diagram below shows an example of the operation of the pump and with burst (active when
H05=3, see parameter H05).
The dashed areas on the compressor line indicate the pump-compressor and compressor-pump delay
times.
Burst mode is disabled in standby and during an alarm when the pump is OFF.
At power ON the delay c17 must elapse before burst can start.
- Minimum pump/fan ON time
c18: This represents the minimum time that the pump remains ON for, see Fig. 5.i (active with H05=3 see
parameter H05).
24
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
• Fan settings: parameters (F*)
ENGLISH
- Fan output
F01: Enables the operation of the fans.
F01=0: fans absent;
F01=1: fans present.
The PWM output (1 or 2, depending on the value of parameter H02) requires the presence of the optional
fan control cards (ON/OFF for the CONVONOFF module or speed variation for MCHRTF or FCS three-phase).
- Fan operating mode
F02: This establishes the operating logic for the fans:
F02=0: always ON at maximum speed, independently from the compressors. The fans are only switched
OFF when the unit is in standby.
F02=1: ON at maximum speed when at least one compressor in the corresponding circuit is ON (parallel
operation in each circuit).
F02=2: ON when the corresponding compressor is ON, with ON/OFF control based on the temperature/
pressure settings for the minimum and maximum speed (parameters F05-F06-F08 and F09). When
the compressors are stopped, the corresponding fans are also stopped, irrespective of the condensing
temperature/pressure.
Cooling ON/OFF
Heating ON/OFF
1
1
100%
100%
F04
F04
0%
Key:
1. speed %;
2. condensing temperature/pressure;
3. hysteresis.
0%
F05
F08
2
F06
F09
2
Fig. 5.a.l
Cooling with speed control
1
Heating with speed control
1
3
3
100 %
F05
F04
F08
F04
F03
F03
0%
0%
2
F07
2
F06
F09
F10
Fig. 5.a.m
F02=3: ON when the corresponding compressor is ON, with speed control. When the compressors are
stopped the corresponding fans are also stopped, irrespective of the condensing temperature/pressure.
With F02=3 and an NTC condenser probe, when the compressor starts the fans are started at maximum
speed for the time F11, irrespective of the temperature measured.
In the event of a condenser probe fault, the fans will be switched OFF.
- Minimum voltage threshold for Triac
F03: In the event of fan speed control, the optional phase cutting cards (MCHRTF*) are required, fitted
with a triac. The voltage delivered by the triac to the electric fan motor corresponding to the minimum
speed must be set. The set value does not correspond to the actual voltage in Volts applied, but rather to
an internal unit of calculation in the µC2SE.
If using FCS controllers, set this parameter to 0.
F03 = Represents the minimum threshold for the triac
- Maximum voltage threshold for Triac
F04: In the event of fan speed control, the optional phase cutting cards (MCHRTF*) are required, fitted
with a triac. The voltage delivered by the triac to the electric fan motor corresponding to the maximum
speed must be set. The set value does not correspond to the actual voltage in Volts applied, but rather to
an internal unit of calculation in the µC2SE.
If using FCS controllers, set this parameter to 100.
F04 = Represents the maximum threshold for the triac
- Temperature/pressure set point for minimum speed in cooling
F05: This represents the temperature or pressure below which the fans remain ON at minimum speed.
In the case of ON/OFF control, it represents the temperature or pressure below which the fans are
switched OFF (Fig. 5.a.k).
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
25
ENGLISH
- Temperature/pressure differential for maximum speed in cooling
F06: This represents the temperature or pressure differential in reference to F05 above which the fans are
started at maximum speed; in the case of ON/OFF control, this represents the differential above which
the fans are started (Fig. 5.a.k).
- Temperature/pressure differential for fans Off in cooling
F07: This represents the temperature or pressure differential in reference to F05 below which the fans
are stopped. The fans are started 1 °C “lower” when using NTC temperature probes, or 0. 5 bars if using
pressure probes. (Fig. 5.a.l)
If NTC temperature probes or pressure probes are used to control the condensing temperature/pressure,
there is an activation hysteresis of 1 °C or 0.5 bar respectively.
- Fan start time
F11: This establishes the operating time at maximum speed when the fans are started, so as to overcome
the mechanical inertia of the motor.
The same times are observed in reference to the start of the compressor (irrespective of the condensing
temperature/pressure), if NTC temperature probes are used on the condenser and speed control
is enabled, F02=3; this is done to bring forward the sudden increase in pressure (which does not
necessarily correspond to a likewise rapid increase in temperature in the area where the probe is located)
and consequently to improve control
F11=0: the function is disabled, that is, the fans are activated at the minimum speed and then controlled
based on the condensing temperature/pressure.
- Triac impulse duration
F12: This represents the duration in milliseconds for the impulse applied to the triac. For induction
motors, set the parameter to 2 (default). On the other hand, when using the CONVONOFF0,
CONV0/10A0 modules or FCS controllers, set the parameter to 0.
- Fan on time when starting in high condensing temp.
F14: establishes the time the fans are operated at maximum speed if starting with a high condensing
temperature.
F14 = 0: function disabled.
F14 > 0: fan on time (in seconds).
The function is operational only in chiller mode, if the probe on the condenser is a temperature sensor
and only for air-cooled units. When the first compressor in the circuit in question starts, it is assumed that
the temperature of the environment is close to the temperature of the condenser; if the value read by the
condenser probe is higher than the value of F05-F07, as well as starting the compressor, the fans in the
circuit in question are forced on at maximum speed for the time set by F14.
- Activate low noise
F15: This function moves the condensing pressure set point so as to lower the fan speed and
consequently reduce noise (specifically at night). If low noise is active in cooling, the condenser control
set points are increased by F16. If low noise is active in heating, the set points are reduced by F17.
F15= 0: Low noise deactivated.
F15= 1: Low noise activated in cooling.
F15= 2: Low noise activated in heating.
F15= 3: Low noise activated in cooling and heating.
N.B. The variation in the set point is not active during defrost
- Cooling set point differential
F16: Differential added to the condenser control set point when low noise is active (valid for both
temperature and pressure control).
• Unit settings: parameters: (H*)
- Unit model
H01: Used to select the type of unit being controlled:
H01= 2: AIR/WATER Chiller
H01= 4:WATER/WATER Chiller
(*) Note: Set H21= 4 (Condenser pump always on), if H02= 1 (Two condensers).
- Number of condenser fan circuits/water condensers
H02: This establishes the number of fan circuits present in the configurations with two circuits. With one
fan circuit (H02=0) the unit may have 1 or 2 refrigerant circuits:
• with one refrigerant circuit, the fans are exclusively controlled based on the pressure or temperature
read by the sensor in the first circuit;
• with two refrigerant circuits, the fans are controlled based on the higher temperature/pressure of the
two circuits. In heat pump mode, the output depends on the lower temperature or pressure.
The output used is Y1. Vice-versa, with 2 ventilation circuits (H02=1) each PWM output is independent
and depends on its own condenser probe (B3 or B4 for circuit 1 and B7 or B8 for circuit 2).
26
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
ENGLISH
- Number of evaporators
H03: This establishes the number of evaporators present when there are 2 or 4 compressors, obviously
with 2 circuits (including the expansion). With one evaporator (H03=0), the management of the
heaters and the antifreeze function is performed only on B2. Vice-versa, with 2 evaporators (H03=1)
antifreeze control will be performed using B2 and B6, while input B5 is used to control the water outlet
temperature.
- Number of compressors/circuits
H04: This establishes the number of compressors per circuit and the number of circuits. For further
details see Table 4.g.
- Evaporator pump/fan operating mode
H05: This establishes the operating mode for the evaporator water pump or the outlet fan (in air/air
units).
H05 = 0: pump disabled, (the flow switch alarm is ignored)
H05 = 1: always ON (the alarm is managed)
H05 = 2: ON when called by compressor (the alarm is managed)
H05 = 3: the pump will be started and stopped at regular intervals (independently from the compressors)
as per the Burst setting (see parameters c17 and c18).
H05= 4: follow hot keep or hot start in heating, always on in cooling
H05= 5: follow hot keep or hot start in heating, follow the compressors in cooling.
When the heating or cooling signal is received, first the evaporator pump/outlet fan starts (always ON),
and then the compressor, after the set times (c07, c08). The pump will not be stopped until all the
compressors are Off.
- Cooling/heating digital input
H06: Establishes whether the cooling/heating selection from digital input is enabled. see parameters P08,
P09, P10, P11, P12 and P13). The open status places the unit in cooling operation, vice-versa, in heating.
D-IN Open = Cooling
D-IN Closed = Heating
- ON/OFF digital input
H07: Establishes whether the ON/OFF selection from digital input is enabled or disabled. If the selection
is enabled (H07= 1), the “open” status switches the unit Off, while in the “closed” status, the unit may be
OFF or ON, as controlled by the keypad.
This parameter is not valid for condensing units.
- µC2SE network configuration
H08: Establishes the layout of the tLan network.
0= µC2SE only
1= µC2SE + valve
2= µC2SE + exp.
3= µC2SE + exp. + valve
4= µC2SE + I/O
5= µC2SE + valve + I/O
6= µC2SE + exp. + I/O
7= µC2SE + I/O + valve + valve
- Enable keypad
H09: Used to disable the modification of the DIRECT and USER parameters from the keypad. The
value of the parameters can always be displayed. The enable/disable cooling, heating and reset counter
functions are also available.
Values:
0: keypad disabled
1: keypad enabled (default)
- Serial address
H10: Establishes the address of the instrument for the serial connection, via an optional board, to a PC
for supervision and/or telemaintenance.
- Selection map outputs
H11: This parameter is used to arbitrarily associate some digital outputs to the devices on the unit.
H11= 0: standard (default); for units with one compressor per circuit (H04=0, 2).
H11= 1: For cooling only units with two compressors (H01=0, 2, 4, 7, 9 and H04=1, 3, 5)
H11= 2: The outputs of the expansion follow the same logic for the 2nd circuit. For H01= 1, 3, 5, 6, 8, 10
and H04= 1, 3, 5
H11= 3: The outputs of the expansion follow the same logic for the 2nd circuit. For H01= 1, 3, 5, 6, 8, 10
and H04= 1, 3, 5
H11= 4: For H01= 1, 3, 5, 6, 8, 10 and H04= 0, 1
H11= 5: For cooling only units with two compressors (H01= 0, 2, 4, 7, 9, and H04= 0)
H11= 6: 1 compressor per circuit, heat pump
H11= 7: 1 compressor per circuit, cooling only, solution 1
H11= 8: 1 compressor per circuit, cooling only, solution 2
H11= 9: 2 compressors per circuit, heat pump
H11= 10: 2 compressors per circuit, cooling only, solution 1
H11= 11: 2 compressors per circuit, cooling only, solution 2
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
27
H11= 12:
ENGLISH
associated device
H11=0
H11= 1
H11= 2
H11= 3
H11= 4
H11= 5
alarm
compressor 2
heater 2
Condenser pump/backup
reversing valve 2
C10
Warning
compressor 1
heater 1
Pump/evaporator (fan) (on
air/air units)
Compressor 2 (or capacity
control comp. 1)
reversing valve 1
compressor 3
heater 2
Condenser pump/backup
Compressor 4 (or capacity
control comp. 2)
reversing valve 2
compressor 1
reversing valve 1
Pump/evaporator (fan) (on
air/air units)
Compressor 2 (or capacity
control comp. 1)
alarm
compressor 3
reversing valve 2
Condenser pump/backup
Compressor 4 (or capacity
control comp. 2)
Warning
compressor 1
heater 1
Pump/evaporator (fan) (on
air/air units)
condenser fan 1
C5
C6
C7
C8
C9
compressor 1
heater 1
Pump/evaporator (fan) (on
air/air units)
Compressor 2 (or capacity
control comp. 1)
alarm
compressor 3
heater 2
Condenser pump/backup
Compressor 4 (or capacity
control comp. 2)
Warning
compressor 1
reversing valve 1
evaporator pump
C4
compressor 1
heater 1
Pump/evaporator (fan) (on
air/air units)
reversing valve 1
outputs
C1
C2
C3
outputs
C1
C2
C3
C4
C5
C6
C7
C8
C9
C10
H11= 6
H11= 7
H11= 8
compressor 1
1 step heater
outlet fan
reversing valve 1
alarm
compressor 3
2 step heater
open freecooling/
freeheating
reversing valve 2
close freecooling/
freeheating
compressor 1
1 step heater
outlet fan
2 step heater
alarm
compressor 3
P29
open freecooling
compressor 1
1 step heater
outlet fan
condenser fan 1
alarm
compressor 3
2 step heater
open freecooling
humidifier (ON/OFF)
close freecooling
condenser fan 2
close freecooling
associated device
H11= 9
compressor 1
compressor 2
outlet fan
reversing valve 1
alarm
compressor 3
open freecooling/
freeheating
1 step heater
close freecooling/
freeheating
Compressor 2 (or capacity
control comp. 1)
alarm
not used
heater 1
Condenser pump/backup
not used
Warning
alarm
compressor 2
heater 2
Condenser pump/backup
condenser fan 2
Warning
H11= 10
H11= 11
H11= 12
compressor 1
compressor 2
outlet fan
heating step 1
alarm
compressor 3
compressor 4
open freecooling/
freeheating
heating step 2
close freecooling/
freeheating
compressor 1
compressor 2
outlet fan
heating step 1
alarm
compressor 3
compressor 1
P25
P26
P27
P28
compressore 3
P29
P30
open freecooling/
freeheating
humidifier
close freecooling/
freeheating
P31
P32
Parameters P25 to P28 can have the following meanings:
0 = no function associated with the relay
1 = compressor 2
2 = Heater 1
3 = Reversing valve 1
4 = Pump/inside fan
5 = Open freecooling/freeheating
6 = Close freecooling/freeheating
7 = Humidifier
8 = Condenser fan 1 on/off
9 = Heater 2
10 = Alarm
10 = Boiler contact
Parameters P29 to P32 can have the following meanings:
0 = no function associated with the relay
1 = compressor 4
2 = Heater 2
3 = Reversing valve 2
4 = Pump/inside fan 2nd evaporator
5 = Open freecooling/freeheating
6 = Close freecooling/freeheating
7 = Humidifier
8 = Condenser fan 2 on/off
9 = Warning
10 = Condenser pump/Backup
11 = Heater 1
28
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
ENGLISH
- Capacity-control logic
H12: Specifies the logic for the activation of the capacity-control steps for the compressors and the 4-way
reversing valve.
H12 = 0: 4-way reversing valve and capacity-control normally energised
H12 = 1: 4-way reversing valve and capacity-control normally de-energised. Default value.
H12 = 2: 4-way reversing valve normally de-energised and capacity-control normally energised
H12 = 3: 4-way reversing valve normally energised and capacity-control normally de-energised.
Note: in the event of capacity-control, the rotation between compressor and corresponding valve is disabled.
FIFO or time logic can be used between the 2 circuits to optimise the starts or the operating hours of the
2 compressors (1 per circuit).
- Enable pump down
H13: This function allows the unit to be stopped while avoiding the possible formation of liquid refrigerant
inside the evaporator.
When the only active compressor is called to stop, the expansion valve is closed so as to depressurise the
circuit.
Valid only when the driver is installed, as the driver pressure probe is used.
- Minimum pumpdown pressure
H14: Limit pressure below which the compressor is deactivated.
- Maximum pumpdown time
H15: Maximum time after which the compressor is deactivated.
- Function of the second pump
H21: This parameter defines how the output dedicated to the second pump must be managed.
H21= 0: the second pump is disabled.
H21= 1: the second pump is used only as a backup.
If the flow switch and corresponding alarm are activated, the pumps are switched over:
• if the alarm passes, a warning is shown on the display and the warning relay is activated, while the
unit continues to operate with the Backup pump. When the next alarm is activated the pumps will be
switched over.
• if the alarm remains active even with the second pump on for longer than the time set for P1, the
generic alarm is generated and the unit is switched OFF.
H21= 2: the second pump represents a backup pump. The two pumps are never used at the same time
but each 24 hours, are switched over. In the event of flow alarms, the logic is the same as for setting 1.
After being switched over due to the flow alarm, the 24-hour timer is set to zero.
H21= 3: the second pump is used as an ON/OFF device in the same way as the condenser fan (which in
this case is not present), in ON/OFF mode, with the same settings (in fact in this case the pump replaces
the fan, including the symbol).
H21= 4: the second pump is used for the condenser but is always ON. In this case the pump symbol is
not managed.
Note: In the event of flow alarms with automatic reset, 10 attempts are made to restart the pump every
90 seconds, for a maximum time of P02; after the 10 attempts, the alarm becomes manual reset. With the
second pump, the attempt consists in switching over the pump that is on, with the same logic.
- Disable load default values
H22: If this parameter is set to 1, it disables the possibility of restoring the default parameters using the
PRG button at power ON.
- select supervisor protocol
H23: establishes the protocol used for the connection to the supervisor from the serial board RS485
H23 = 0: CAREL protocol (baud rate 19200,…)
H23 = 1: Modbus protocol
- High/Low temperature alarm mode
H24: determines when HT/LT alarm appears, whether the compressor stops
H24 = 0: compressor doesn’t stop
H24 = 1: compressor stops when HT alarm appears
H24 = 2: compressor stops when LT alarm appears
H24 = 3: compressor stops when HT or LT alarm appear
- Enable hot gas bypass function
H25: determines whether the hot gas bypass function is enabled
H25 = 0: disable
H25 = 1: enable
- Enable special standby function
H26: determines whether the special stanby function is enabled
H25 = 0: disable
H25 = 1: enable
When this function is enable, if during STAND BY mode the temperature B1 drops below r3 the unit
switches on the heating mode (electrical heater or hot gas bypass).
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
29
• Alarm settings: parameters (P*)
ENGLISH
- Flow switch alarm delay when starting pump
P01: Establishes a delay in the recognition of the flow switch alarm when starting the pump (this allows the
flow-rate to stabilise). In the event of alarms, the compressors are stopped immediately, ignoring the times.
- Flow switch alarm delay in steady operation
P02: Establishes a delay in the recognition of the flow switch alarm in steady operation, so as to filter any
variations in flow-rate or air bubbles present in the water circuit. In the event of alarms, the compressors
are stopped immediately, ignoring the times.
- Low pressure alarm delay at compressor start
P03: Establishes a delay in the recognition of the low pressure alarm when the compressor starts, so as
to allow stable operating conditions to be reached. This delay is also counted when reversing the 4-way
valve in the refrigerant circuit.
- Part load in high pressure and low pressure in heat pump
P04: enable or disable the part load operation of the circuit in high pressure.
The function is valid if the unit is fitted with tandem or capacity controlled compressors and pressure
transducers. In the event of high pressure alarms, that is, for values over P18 (hysteresis 0.5 bar), the
controller deactivates a load step in the circuit in question and waits 10 seconds. After this interval, if the
alarm is still active, the unit is stopped, otherwise it continues to operate in part load mode. In this situation,
the display shows the message PH1 and/or PH2, depending on the circuit. This condition remains active
until the pressure falls below the value corresponding to the maximum speed of the condenser fans
(F05+F06). Below this value, the unit reactivates the load step that had previously been deactivated.
P04=0: capacity control not activated
P04=1: capacity control activated for high pressure
P04=2: capacity control activated for low pressure
P04=3: capacity control activated for high and low pressure
With the unit operating in heat pump mode, due to low outside temperatures or the load the pressure may
fall and stop the unit due to the low pressure alarm. If the circuit has 2 compressor steps and the pressure
remains below the value of one bar for the time P22, the circuit can operate at part load. This capacity
control is not activated when the alarm comes from the digital input. In the event of low pressure, the
controller deactivates one step and if the pressure does not return above the threshold in 10 seconds, the
alarm is activated and the circuit is stopped. This function is valid for all units with pressure transducers.
Part load in low pressure
all LP
parz LP
1 bar
1,5 bar
2 bar
F08-F09
pressure
Fig. 5.b.b
- Alarm reset
P05: Enables automatic reset for all those alarms that normally feature manual reset (high pressure, low
pressure, flow switch/antifreeze) as per the following table:
P05= 0: (default) high pressure, low pressure and antifreeze (low temperature) with manual reset;
P05= 1: all the alarms with automatic reset;
P05= 2: high pressure and antifreeze (low temperature) manual, low pressure automatic;
P05= 3: high pressure manual, low pressure and antifreeze (low temperature) automatic;
P05= 4: high and low pressure manual, antifreeze (low temperature) automatic;
P05= 5: high and low pressure manual after the third activation in one hour*, antifreeze (low temperature)
automatic;
P05= 6: high and low pressure manual after the third activation in one hour*, antifreeze (low temperature) manual.
*: the high and low pressure alarms are managed in the
same way both for the transducers and the pressure switches
(digital input); if the unit is in standby the count (3 times in
one hour) is reset.
- Low pressure alarm with pressure probes
P07: P07=0: this function is disabled.
P07=1: if in heat pump mode the evaporator (external exchanger) pressure is less than 1 bar (and if the
presence of the condenser pressure probe is enabled), the low pressure alarm is activated (while still
considering the delay P03).
Note: P07=1 the LP digital inputs in heat pump are ignored.
note 1: if P08 is set to 10, the change in state considers the
times d12 and d13, and respects the compressor protection
times, both from the digital input and the keypad.
note 2: if the digital input is used to switch the unit ON/OFF
or change the operating mode, these functions are disabled
on the keypad.
note 3: ID5 for the condensing unit with reverse cycle has
the function of cooling/heating changeover
30
- Select digital input ID1
P08= 0:
none;
P08= 1:
flow switch with manual reset (normally closed);
P08= 2:
flow switch with automatic reset (N.C.);
P08= 3:
general thermal overload with manual reset (N.C.);
P08= 4:
general thermal overload with automatic reset (N.C.);
P08= 5:
thermal overload circuit 1 with manual reset (N.C.);
P08= 6:
thermal overload circuit 1 with automatic reset (N.C.);
P08= 7:
thermal overload circuit 2 with manual reset (N.C.);
P08= 8:
thermal overload circuit 2 with automatic reset (N.C.);
P08= 9:
cooling/heating (open = Cooling, closed = Heating) if H06= 1;
P08= 10: cooling/heating with delays d12 and d13 (open = Cooling, closed = Heating) if H06= 1;
P08= 11: alarm signal with manual reset (N.C.);
P08= 12: alarm signal with automatic reset (N.C.);
P08= 13: second set point from external contact (cooling and heating), (normally open);
P08= 14: second cooling set point from external contact and heating from time band (N.O.);
P08= 15: end defrost from external contact circuit 1 (N.C.);
P08= 16: end defrost from external contact circuit 2 (N.C.);
P08= 17: end defrost from external contact circuit 1 (N.C.);
P08= 18: end defrost from external contact circuit 2 (N.C.);
P08= 19: condenser step 1 (N.O.);
P08= 20: condenser step 2 (N.O.);
P08= 21: condenser step 3 (N.O.);
P08= 22: condenser step 4 (N.O.);
P08= 23: remote ON/OFF.
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
ENGLISH
- Select digital inputs ID2, ID6, ID7, ID10, ID5
P09, P10, P11, P12, P34: Configuration of digital inputs ID2, ID6, ID7, ID10, and ID5 respectively (as per
the table above for digital input ID1).
Note: Cooling/heating (9, 10) cannot be set on P10, P11, P12, and P14.
- Select input B4 if /04 = 1
P13: If input B4 is used as ON/OFF (/04 = 1) the same options are valid as for P08.
- Select input B8 if /08 = 1
P14: If input B8 is used as ON/OFF (/08 = 1) the same options are valid as for P08.
- Select low pressure alarm
P15: Used to select whether the low pressure alarm is detected when the compressor is OFF (P15=1) or
alternatively only when the compressor is ON (P15=0, default).
When the compressor starts the alarm is in any case ignored for the time P03.
- High temperature/high system start-up temperature alarm delay
P16: Represents the high temperature alarm threshold detected by probe B1; the differential is set at 2
°C and the alarm is reset automatically (the alarm relay is activated, signal only, and the message “Ht” is
shown). When starting the system, this alarm is ignored for the time P17. If the system start-up protection
is enabled (see parameter P20) and the alarm is activated, the time P17 is ignored and the alarm has no
hysteresis.
- High temperature alarm delay on power-up
P17: High temperature alarm delay when the control is switched on (power ON), from the remote ON/
OFF contact or from the keypad.
- High pressure alarm from transducer set point
P18: Sets the value beyond which the high pressure alarm is generated. Each circuit will be managed by
its own transducer.
P18= 0: the function is disabled.
For all other values greater than 3.0, due to the hysteresis (3 bars), the alarm is managed according to the
set value.
- Low temperature alarm set point
P19: Represents a threshold for the low temperature (measured by probe B1) alarm, the differential is set
at 2 °C and it is reset automatically (the alarm relay is activated and the disply shows the message “Lt”)
- System start-up protection for high/low temperature
P20: If set to 1, this parameter enables the system protection function when starting, both at power ON
and when switching ON from Standby.
For values of B1 greater than the set point P19, an alarm is activated and the unit is not started (display
“AHt”).
The alarm is reset automatically.
P20=0: the function is not enabled.
- Low pressure alarm waiting time in heat pump
P22: Delay in generating the low pressure alarm in heat pump mode
If the pressure remains below 1 bar for the time p22 and the circuit has 2 compressor steps, the circuit
can operate at part load (see P04). This preventive capacity control function remains active until the
pressure rises above F08-F09.
- Low pressure alarm waiting time during defrost
P23: Delay in generating the low pressure alarm in heat pump mode during defrost
- Deactivate compressors in capacity control for HP and LP
P24: Decide which compressor must be stopped in each circuit during capacity control
P24= 0 stops compressors 1 and 3
P24= 1 stops compressors 2 and 4
- Low pressure alarm set point from transducer
P33: : Sets the value beyond which the low pressure alarm is generated when the unit is operating in
heat pump mode. Each circuit will be managed according to its own transducer.
P33= 0 the function is disabled.
- Mute alarm relay using “PRg/mute” button
P35=0 the PRG/mute button does not alter the status of the relay, if the alarm is active and in progress.
P35=1 the PRG/mute button alters the status of the relay even if the alarm is active and in progress, as if
it were a buzzer or a siren.
- High pressure alarm management
P36: the parameter is used to consider the high pressure alarm even when the compressor is off or
consider it only when the compressor is on, depending on whether the pressure switch is directly
connected to the digital input on the controller or via another circuit.
P36=0: high pressure alarm always considered (pressure switch connected directly to the digital input).
P36=1: high pressure alarm considered 2 seconds after starting the compressor.
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
31
ENGLISH
- Definition of DI11 to DI15
P37: selection of digital input 11 (input 1 I/O board)
P38: selection of digital input 12 (input 1 I/O board)
P39: selection of digital input 13 (input 1 I/O board)
P40: selection of digital input 14 (input 1 I/O board)
P41: selection of digital input 15 (input 1 I/O board)
Each parameter can be:
0= not connected
1= alarm Ad1
2= alarm Ad2
3= alarm Ad3
4= alarm Ad4
5= alarm Ad5
6= warning Ad1
7= warning Ad2
8= warning Ad3
9= warning Ad4
10= warning Ad5
Note: all alarms stop the unit. THe alarm relay will be activated. All warning activate the warning relay.
- Definition of DO11 to DO15
P42: selection of digital output 11 (output 1 I/O board)
P43: selection of digital output 12 (output 1 I/O board)
P44: selection of digital output 13 (output 1 I/O board)
P45: selection of digital output 14 (output 1 I/O board)
P46: selection of digital output 15 (output 1 I/O board)
Each parameter can be:
0= not connected
1= Ad1
2= Ad2
3= Ad3
4= Ad4
5= Ad5
6= HP1
7= HP2
8= LP1
9= LP2
10= TC1
11= TC2
12= FL
13= LT
14= HT
15= ALT
16= AHT
17= TP
18= FLB
• Control settings: parameters (r*)
- Cooling set point
r01: between r13 and r14
r02: cooling differential value of DTE when the unit is first started (autotuning enabled)
- Compressor rotation
r05: The rotation of the compressors allows the operating hours to be balanced either statistically, using
FIFO logic, or absolutely, by counting the effective operating hours. Settings:
r05=0: rotation disabled; The customer can use compressors with different power ratings according
to the desired logic or manage the capacity-control functions. The compressors are started/stopped in
proportional mode.
r05=1: rotation with FIFO logic (first ON, first OFF, and vice-versa first OFF, first ON); in this mode the
operating hours are optimised together with the number of starts, even if the compressor safety times are
always respected.
r05=2: rotation with control of operating hours; in this way the compressors will have the same operating
hours, as the compressor with the least operating hours is always started first, again observing the safety
times. This does not however consider FIFO logic and does not optimise the starts and stops. In the case of
capacity controlled compressors (1 per circuit), FIFO logic or timed operation will refer to the actual circuit
and not the compressor valves. If, for example, when capacity is required from circuit 1, compressor 1 starts
first, capacity controlled (not at full capacity), and then the valve is managed as a second step, so that the
compressor will work at maximum efficiency. If less capacity is required, the second step will be deactivated
first, and then the compressor. There is no rotation between the compressor and the valve. If extra capacity is
required, the second circuit will start with compressor 2 and then, if required, the valve is operated.
32
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
ENGLISH
When stopping, the valve is managed first and then the actual compressor as a whole. Both FIFO logic
and timed operation will involve either one circuit or the other. The activation and deactivation of the valves
are not subject to timers, but rather only a hysteresis that is equal to the set point and the differential of
the step (in fact the valve performs the same function as a hermetic compressor).
r05=3: direct correspondence between the digital inputs and the compressor relays (condensing units
only).
- Type of compressor control
r06: This parameter is used to set the logic for maintaining the set point:
r06= 0: proportional on inlet
r06= 1: proportional on inlet + dead zone (see Dead zone, below)
r06= 2: proportional on outlet
r06= 3: proportional on outlet with dead zone
r06= 4: on outlet by time with dead zone (see timed outlet temperature control)
ON
DEAD ZONE
The dead zone essentially shifts the proportional band from the set
point by the value set for the parameter r07.This parameter is valid in
all configurations if enabled (for r070: dead zone set and enabled).
Key Figure 5.b.c:
r06: enable the dead zone (enabled if r06=1 or 3)
r07: dead zone
r01: cooling set point
r02: cooling differential
OFF r01
r01+r07+r02/4
r01+r07
r01+r07+r02*3/4
r01+r07+r02/2
r01+r07+r02
Fig. 5.b.c
In chiller (cooling) mode, the dead zone moves the cooling proportional band above the set point by the
value r07.
Outlet temperature control by time r06 = 4
This type of control is based on the need to maintain the outlet temperature as constant as possible,
despite the load being variable or the reduced inertia of the system.
The logic has the aim of keeping the temperature inside the dead zone.
If outside the zone, the compressors will be activated with the logic described below, so as to return
inside the dead zone, neither too quickly (using an integral or derivative), nor too slowly, with fixed time
logic. There are two logical times involved: the activation time and deactivation time.
- Dead zone differential
r07: (see dead zone)
- Activation delay at lower limit of r07 (if r06 = 4)
r08: The value set is used in the control algorithm (see timed outlet temperature control) as the
maximum time (at the start of the differential) for the activation of the compressors.
- Activation delay at upper limit of r07 (if r06 = 4)
r09: The value set is used in the control algorithm (see timed outlet temperature control) as the
minimum time (at the end of the differential) for the activation of the compressors.
Activation time (cooling)
The activation time is not a set parameter, but rather the combination of two set parameters, that is, r08
and r09. When the temperature leaves the dead zone, the activation time is equal to r08, while at the end
of the differential r02 the activation time is equal to r09.
Inside the differential r02, the activation time varies linearly between r08 and r09.
This means that as the temperature moves away from the set point, the times are reduced and the
esponse of the process becomes more dynamic.
r10
time
activation time
r11
temperature
- Deactivation delay at upper limit of r12 (if r06 = 4)
r10: The value set is used in the control algorithm (see timed outlet temperature control) as the
maximum time (at the set point) for the deactivation of the compressors.
r03+r12
dead zone
comp. act. differential
Fig. 5.b.e
- Deactivation delay at lower limit of r12 (if r06 = 4)
r11: The value set for this parameter is used in the control algorithm (see timed outlet temperature
control) as the minimum time (at the end of the deactivation differential) for the deactivation of the
compressors.
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
r03
33
deactivation time
time
ENGLISH
r01
- Compressor deactivation differential (if r06 = 4)
r12: This represents the temperature differential for the deactivation of the compressors, according to the
procedure described in “Deactivation time”.
Deactivation time (cooling) Fig. 5.b.f
In the same way as for the activation time, the deactivation time also varies between a maximum value,
set for the parameter r10 and corresponding to the set point temperature, and a minimum, set for the
parameter r11 corresponding to the end of the differential for the deactivation of the compressors, set by
the parameter r12.
r01
A1
A4
temperature
compressor
r01-r12
compressor
stop
Below this value, the deactivation time will be equal to the minimum set until reaching the temperature
A04, after which all the compressors will be switched OFF, irrespective of the times. As the temperature
moves away from the set point, the response of the process becomes more dynamic.
deactivation time
Fig. 5.b.f
- Minimum Cooling set point
r13: Establishes the minimum limit for setting the Cooling set point.
- Maximum Cooling set point
r14: Establishes the maximum limit for setting the Cooling set point.
- Cooling compensation constant (chiller mode):
r17: Sets the coefficient that controls the cooling compensation algorithm. In cooling mode, if r17 is
positive, the set point increases as the outside temperature increases (measured by the outside probe); if
on the other hand r17 is negative the set point decreases as the outside temperature increases.
This difference in the set point from the set value can have a maximum absolute value equal to the
setting of r18. The values for the parameters shown on the graph are: r17=±2, r01=25, r19=32 and r18=5).
50
3
40
4
1
30
20
5
r18
6
r18
Key:
1.
2.
3.
4.
5.
6.
7.
7
10
2
Fig. 5.b.i
temperature;
time;
external temperature (probe B3/B4);
comp. start temperature (r19);
positive compensation (r17= 2);
set point (r1);
negative compensation (r17=-2).
- Maximum deviation from the set point
r18: Indicates the maximum deviation from the set point beyond which compensation is stopped
(maximum and minimum limits in reference to the set point).
Example of compressor deactivation due to outside
temperature
1
ON
r25
r25+1 °C
- Start compensation temperature in cooling (outside probe)
r19: Sets the temperature (measured by the outside probe) above which the compensation function
starts (cooling), value between -40T80 °C.
2
Fig. 5.b.l
- Start compensation temperature in heating (outside probe)
r20: Sets the temperature (measured by the outside probe) below which the compensation function
starts (heating), the value must be between -40T80 °C.
- Second cooling set point from external contact
r21: Represents the alternative to r01 if an associated digital input is closed (see parameter P08), between
r13 and r14.
- Outside temperature set point to stop compressors
r25: To avoid energy efficiency lower than electrical heating, the compressors are stopped if the outside
temperature falls below r25, the differential to start them again is set to 1 degree. The heaters can then be
activated according to the corresponding set point.
Setting 25 to “-40” (default value) disabled the function.
- Buffer tank suppression (low load)
r27: The low load condition is determined when only one compressor is started and then is stopped after
operating for less than the time set for parameter r28.
The settings are:
r27=0: the function is disabled;
r27=1: enabled only in chiller mode;
r27=2: enabled only in heat pump mode;
r27=3: enabled in chiller and heat pump modes.
34
- Minimum compressor on time to determine low load condition
r28: This parameter represents the minimum compressor on time below which the low load condition is
determined. Whenever the compressor stops, the controller analyses the load status.
If already in low load condition, the time considered by the controller for the analysis becomes “r28 x r29:
r02” in chiller mode, or “r28 x r30 : r04” in heat pump mode.
This parameter also has the meaning of damper travel time when freecooling/heating is enabled.
When the sum of the opening times reaches 2*damper travel time, the damper is no longer moved. The
sum is reset when the damper is closing. Operation is the same in closing.
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
ENGLISH
- Differential during the low load condition in chiller mode
r29: This parameter represents the new differential considered by the controller in chiller mode during
the low load condition.
Specifically, r02 is replaced by r29.
This also has the meaning of freecooling differential.
- Differential during the low load condition in heat pump mode
r30: This parameter represents the new differential considered by the controller in heat pump mode
during the low load condition.
Specifically, r04 is replaced by r30.
This also has the meaning of freeheating differential.
1
2
on
Key:
on
off
r01
r01 + r02
off
5
r01
r01 + r29
1. chiller;
2. chiller in low load;
5. temperature.
5
Fig. 5.b.m
- Electric heater set point relationship
r43: defines the relationship between the absolute set point, considered as the activation threshold for
the electric heaters, and the relative set point, that is, the activation threshold for the electric heaters
referred to a working set point (set point sent by µAD, r01 or r04 or from time band) depending on the
various applications and the mode, cooling or heating, and more precisely:
r43= 0 A4, A8, A11, P16, P19 absolute values
r43= 1 A4, P16, P19 absolute values; A8, A11 relative values
r43= 2 A8, A11, P16, P19 absolute values; A4 relative value
r43= 3 P16, P19 absolute values; A4, A8, A11 relative values
r43= 4 A4, A8, A11 absolute values; P16, P19 relative values
r43= 5 A4 absolute value; A8, A11, P16, P19 relative values
r43=6 A8, A11 absolute values; A4, P16, P19 relative values
r43=7 A4, A8, A11, P16, P19 relative values
- Maximum value of calculated set point in relative regulation
r45: for the relative set point function, there is a maximum limit. When the control works in relative
mode, the set point calculated is lmited by r45.
- Minimum value of calculated set point in relative regulation
r46: for the relative set point function, there is a minimum limit. When the control works in relative mode,
the set point calculated is lmited by r46.
• Firmware parameters: (F-r*)
These parameters cannot be set (display only:
H95: software version of I/O board;
H96-H97: software version of Driver 1, 2;
H98: software version of the expansion;
H99: software version of the µC2SE controller.
Functions available with the clock board
The alarm log is only active and operative if the clock board is fitted. The terminal shows whether the
clock board is fitted by displaying the following parameters:
- RTC hours
t01: RTC hours
- RTC minutes
t02: RTC minutes
- RTC day
t03: RTC day
- RTC month
t04: RTC month
- RTC year
t05: RTC year
The alarms are only shown on the local display.
The controller saves the significant events that stop (alarms) or limit (warnings) the operation of the unit.
Up to 25 events can be saved, highlighting:
— Event code;
— Start hours;
— Start minutes;
— Start day;
— Start month;
— End hours;
— End minutes;
— End day;
— End month.
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
35
ENGLISH
The log is accessed by pressing PRG+SEL for 5s and entering the password 44.
The alarms saved are complete, as they include both the start and end of the event.
The alarms can be deleted individually by pressing UP and DOWN for 5s when the desired event is
displayed. If there are no alarms saved, “noH” is displayed. The table shows the possible alarms that can
be saved:
SV
All. Circ. 1
All Circ. 2
All. Circ. 1
All Circ. 2
All. Gen.
All. Circ. 1
All. cir. 2
All. Gen
All. Sonde
All. Sonde
All. Sonde
Display
HP1
HP2
LP1
LP2
TP
tC1
tC2
FL
E1
E2
E3*
Type
High pressure circuit 1
High pressure circuit 2
Low pressure circuit 1
Low pressure circuit 2
General thermal overload
Thermal overload circuit 1
Thermal overload circuit 2
Flow switch alarm
Probe B1 alarm
Probe B2 alarm
Probe B3 alarm
SV
All. Sonde
All. Sonde
All. Sonde
All. Sonde
All. Sonde
All. Gen.
All. Circ. 1
All. Circ. 2
All. Gen.
All. Evd 1
All. Evd 2
Display
E4*
E5
E6
E7*
E8*
ESP
A1
A2
EHS
Ed1
Ed2
Type
Probe B4 alarm
Probe B5 alarm
Probe B6 alarm
Probe B7 alarm7
Probe B8 alarm
Expansion error
Frost alarm circ. 1
Frost alarm circ. 2
High power supply voltage
EVD1 tLAN error
EVD2 tLAN error
SV
OFF
All. Evd 2
All. Evd 1
All. Evd 2
All. Evd 1
All. Evd 2
All. Evd 1
All. Evd 2
All. Evd 1
All. Evd 2
All. Sonda µAD
Display
SH1
SH2
EP1
EP2
ES1
ES2
EU1
EU2
Eb1
Eb2
Et
Type
EVD1 overheat alarm
EVD2 overheat alarm
EEPROM error EVD 1
EEPROM error EVD 2
Probe error EVD 1
Probe error EVD 2
Valve open error EVD 1 start
Valve open error EVD 2 start
EVD 1 battery alarm
EVD 2 battery alarm
uAD terminal probe alarm
- Start hours for 2nd set point in cooling
t06 (I92): Hour when the second cooling set point starts(r21).
- Start minutes for 2nd set point in cooling
t07 (I93): Minutes when the second cooling set point starts (r21).
- End hours for 2nd set point in cooling
t08 (I94): Hour when the second cooling set point stops (r21).
- End minutes for 2nd set point in cooling
t09 (I95): Minutes when the second cooling set point stops (r21).
If a digital input is configured as the second set point from external contact (e.g. p08 = 13) the time bands
are ignored. If a digital input is configured as the second cooling set point from external contact and
heating set point from time band (e.g. p08 = 14), the cooling time bands are ignored.
The second set point from external contact input has priority over the second cooling set point from
external contact and heating set point from time band.
- Start hours for low noise in cooling
t14: Start hours for low noise in cooling
- Start minutes for low noise in cooling
t15: Start minutes for low noise in cooling
- End hours for low noise in cooling
t16: End hours for low noise in cooling
- End minutes for low noise in cooling
t17: End minutes for low noise in cooling
36
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
Key to the table of alarms:
*: if the probe is set for the compensation function, in the event of probe faults, the unit continues to operate.
ON*: if the expansion card is not present.
EVD 1= EVD400 connected to µC2SE (1st circ.)
EVD 2= EVD400 connected to the expansion (2nd circ.)
alarm
display
IO
HP1
HP2
LP1
LP2
TP
tC1
tC2
LA
FL
FLb
E1
E2
E3*
E4*
E5
E6
E7*
E8*
Hc1-4
EPr
EPb
ESP
EL1-2
dF1-2
d1-2
A1
A2
Ht
Lt
AHt
ALt
ELS
EHS
Ed1
Ed2
SH1
SH2
nO1
nO2
LO1
LO2
HA1
HA2
EP1
EP2
ES1
ES2
EU1
EU2
Eb1
Eb2
L
Ed1
Ed2
PH1
PH2
SUL
alarm type
resetting
Compressor
pump
fan
heater Valve alarm
OFF
warning superv.
variable
-
superv. variab.
description
Signal on display
variab.
type
Digital
Communication error with
I/O board
High pressure
High pressure
Low pressure
Low pressure
General overload
Circuit 1 overload
Circuit 2 overload
advice
Flow controller alarm
Backup pump warning
Probe B1 alarm
Probe B2 alarm
Probe B3 alarm
Probe B4 alarm
Probe B5 alarm
Probe B6 alarm
Probe B7 alarm
Probe B8 alarm
Hour warning C1-4
EEPROM error during
operation
EEPROM error at the start-up
Expansion Error
Zero cross
Defrosting error
Defrost on circuit in
question
Frost alarm circ. 1
Frost alarm circ. 2
High temperature
Low ambient temp.
High temperature at the
start-up
Low temperature at the
start-up
Low supply voltage
High supply voltage
EVD 1 tLAN error
EVD 2 tLAN error
EVD 1 superheat alarm
EVD 2 superheat alarm
MOP 1 warning
MOP 2 warning
LOP 1 warning
LOP 1 warning
High inlet temperature
warning circ.1
High inlet temperature
warning circ. 2
EVD 1 Eeprom error
EVD 2 Eeprom error
EVD 1 probe error
EVD 2 probe error
Open valve EVD 1 error at
the start-up
Open valve EVD 2 error at
the start-up
EVD 1 battery alarm
EVD 2 battery alarm
Low load warning
tLan EVD 1 communication
error
tLan EVD 2 communication
error
Low pressure circ. 1 warning
Low pressure circ. 2 warning
low outlet temperature
warning
Automatic
OFF
OFF
OFF
OFF
OFF
Depends on P05
Depends on P05
Depends on P05
Depends on P05
Depends on P08
Depends on P08
Depends on P08
Depends on P08
Depends on P08
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
OFF C1-2
OFF C3-4
OFF C1-2
OFF C3-4
OFF
OFF C1-2
OFF C3-4
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
-
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
-
ON(60”)
ON(60”)
OFF 1
OFF 2
OFF
OFF 1
OFF 2
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
-
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
-
-
ON
ON
ON
ON
ON
ON
ON
ON*
ON
ON
ON
ON
ON
ON
ON
ON
ON
-
ON
ON
ON
ON
41 (R)
42 (R)
41 (R)
42 (R)
45 (R)
41 (R)
42 (R)
50 (R)
45 (R)
50 (R)
46 (R)
46 (R)
46 (R)
46 (R)
46 (R)
46 (R)
46 (R)
46 (R)
47 (R)
50 (R)
Circuit 1 alarm
Circuit 2 alarm
Circuit 1 alarm
Circuit 2 alarm
General warning
Circuit 1 alarm
Circuit 2 alarm
General advice
General alarm
General advice
Probe alarm
Probe alarm
Probe alarm
Probe alarm
Probe alarm
Probe alarm
Probe alarm
Probe alarm
Compressor advice
General advice
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Automatic
Automatic
Automatic
Automatic
-
OFF
OFF
-
OFF
OFF
-
OFF
OFF
100%
-
OFF
OFF
-
OFF
OFF
-
OFF
ON
ON*
-
OFF
ON
ON
-
45 (R)
45 (R)
52 (R)
50 (R)
-
General alarm
General alarm
Fan advice
General warning
Signal on display
Digital
Digital
Digital
Digital
-
Depends on P05
Depends on P05
Automatic
Depends on P05
Automatic
OFF C1-2
OFF C3-4
OFF
-
OFF 1
OFF 2
OFF
OFF
-
ON
ON
ON*
ON*
-
ON
ON
ON
41 (R)
42 (R)
51 (R)
51 (R)
50 (R)
Circuit 1 alarm
Circuit 2 alarm
Temperature advice
Temperature advice
General warning
Digital
Digital
Digital
Digital
Digital
Automatic
OFF
-
OFF
OFF
-
-
ON
50 (R)
General warning
Digital
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
Automatic
OFF
OFF C1-2
OFF C3-4
OFF C1-2
OFF C3-4
-
OFF
-
OFF
OFF
OFF
OFFOFF-
OFF
-
OFF
-
OFF
ON
ON
ON
ON
-
ON
OFF
ON
ON
ON
ON
ON
50 (R)
45 (R)
43 (R)
44 (R)
43 (R)
44 (R)
48 (R)
49 (R)
48 (R)
49 (R)
48 (R)
General warning
General alarm
EVD 1 warning
EVD 2 warning
EVD 1 warning
EVD 2 warning
EVD 1 advice
EVD 2 advice
EVD 1 advice
EVD 2 advice
EVD 1 advice
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Automatic
-
-
-
-
-
-
ON
49 (R)
EVD 2 advice
Digital
Automatic
Automatic
Automatic
Automatic
Automatic
OFF C1-2
OFF C3-4
OFF C1-2
OFF C3-4
OFF C1-2
-
OFFOFFOFFOFFOFF
-
-
ON
ON
ON
ON
ON
-
43 (R)
44 (R)
43 (R)
44 (R)
43 (R)
EVD 1 warning
EVD 2 warning
EVD 1 warning
EVD 2 warning
EVD 1 warning
Digital
Digital
Digital
Digital
Digital
Automatic
OFF C3-4
-
OFF
-
-
ON
-
44 (R)
EVD 2 warning
Digital
Automatic
Automatic
Automatic
Automatic
OFF C1-2
OFF C3-4
OFF C1-2
-
OFF
OFF
OFF
-
-
ON
ON
ON
-
43 (R)
44 (R)
43 (R)
EVD 1 warning
EVD 2 warning
Signal on display
EVD 1 warning
Digital
Digital
Digital
Automatic
OFF C3-4
-
OFF
-
-
ON
-
44 (R)
EVD 2 warning
Digital
-
-
-
-
-
-
-
-
-
Signal on display
Signal on display
Signal on display
-
Table 6.a
Note: The warning relay differs from the alarm relay as it is only activated for warnings, that is, signals only, which
have no direct effect on the operation of the unit, and the display does not show the alarm symbol (bell).
N.B. The alarm relating to the circuit with the fault must not interact with the operation of the other
circuit, as long as the condenser is not shared in common.
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
37
ENGLISH
6. TABLE OF ALARMS
ENGLISH
IO: communication error with I/O board
If the control loses communication with I/O board, all of the system will be inhibited to prevent the unit being
damaged. The alarm relay will be activated and the message will be visible on the display with fixed red LED.
HP1: High pressure circuit 1
The alarm is detected irrespective of the status of the pump and the compressors. The compressors
corresponding to circuit 1 are immediately stopped (ignoring the set protection times), the buzzer and
alarm relay are activated, and the display starts flashing.
The fans corresponding to the condenser in circuit 1 are activated at maximum speed for 60 s, so as
to oppose the alarm situation, after which they are switched OFF. This alarm may also be generated
when the high pressure limit is exceeded (valid only when the pressure transducer is fitted) set by the
parameter P18, which to be enabled must be greater than 3.0 bars, due to the corresponding hysteresis.
HP2: High pressure circuit 2
As for HP1 but relating to circuit 2.
LP1: Low pressure circuit 1
The alarm depends on P15, P7 and P3.
P15= 0, P07= 0: the alarm is detected only if the compressors in circuit 1 are ON, and after the time P03
from when the compressors started, otherwise it is immediate.
P15= 1, P07= 0: the alarm is detected even if the compressors in circuit 1 are off, after the time P03.
P15= 0, P07= 1: the alarm is detected only if the compressors in circuit 1 are ON, and after the time P03
from when the compressors started, otherwise it is immediate, and if in heat pump mode, is activated for
pressure values less than 1 bar.
P15= 1, P07= 1: the alarm is detected also if the compressors in circuit 1 are Off, after the time P03, and if in
heat pump mode, is activated for pressure values lower then 1 bar. The hysteresis for this alarm is 1 bar.
LP2: Low pressure circuit 2
As for LP1 but relating to circuit 2.
PH1: Compressor part load circuit 1
Indicates the part load of circuit 1 due to high pressure. This situation is signalled by the message “PH1”
on the display the activation of the warning relay.
PH2: Compressor part load circuit 2
As for PC1, but for circuit 2.
tP: General thermal overload
The alarm is detected irrespective of the status of the pump and the compressors. The compressors, the
pumps and fans stop (without observing the protection times) or are inhibited from starting, the alarm
relay is activated, the display flashes the corresponding message, and the LED flashes. It can be reset
either manually or automatically (see par. P08, P09, P10, P11, P12, P13).
tC1: Thermal overload circuit 1
As for tP but relating to circuit 1
tC2: Thermal overload circuit 2
As for tC1 but relating to circuit 2.
LA: generic warning
This represents a generic warning that appears on the display, from digital input, without modifying the
operation of the unit. With the 1st circuit module only, the alarm relay is activated, while with the
expansion card the warning relay can be used.
FL: flow alarm
This alarm is detected only if the pump is ON (excluding the delays when starting P01 and in steady
operation P02), irrespective of the status of the compressor. All of the outputs are disabled: pump,
compressor (without observing the OFF times), condenser fan, and the buzzer sounds, the alarm relay is
activated and the display flashes.
The presence of the utility water pump must be enabled (H50). It can be reset either manually or
automatically (see P08, P09, P10, P11, P12, P13).
FLb: Backup pump warning
The warning activates the warning relay and displays the message “FLb”; reset is manual. This indicates
the operation of the backup pump (if present) due to a probable fault on the main pump, suggesting that
maintenance is required. If the flow alarm features automatic reset, the controller will make 10 attempts
to re-start the pumps, after which the FL alarm will replace FLb. If the flow alarm features manual reset,
when first activated the controller will display the alarm FLb, switching over the pumps; when activated
again the FL alarm will replace FLb.
E1 to E8: probe error detected even when the unit is in Standby
The presence of a probe alarm causes the deactivation of the compressor, the condenser fans, the pump
(outlet fan in AIR/AIR units) and the heaters (so as to avoid fires in the air/air units); the buzzer and alarm
relay are activated, and the display starts flashing.
If the probe has a compensation function, the unit will continue a operate correctly, with the exception of
the corresponding function, and the warning relay will be activated and a message shown on the display,
from E1 to E8 for probes from B1 to B8.
38
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
ENGLISH
Hc1 to Hc4: compressor operating hour limit exceeded warning
When the number of operating hours for the compressor exceeds the maintenance threshold (as default
equal to zero, and consequently the function is disabled), the maintenance request signal is activated.
The buzzer and the alarm relay are not activated, however the warning relay is activated (with the
expansion card fitted).
Epr, EPb: EEPROM error
A problem has occurred when saving the parameters to the unit’s non-volatile memory (EEPROM); in the
event of an Epr error, the µC2SE continues to perform the control functions with the data present in the
volatile memory (RAM), where there is a physical copy of all of the data. After the first power failure the
configuration will be lost.
The buzzer and the alarm relay are not activated. If the occurs when starting the unit, “EPb”, the controller
will not operate.
ESP: communication error with expansion card
If the controller loses communication with the expansion card, the entire system will be stopped to avoid
adversely affecting the unit. The alarm relay is activated and the display will show the message, with the
red LED on steady.
EL1-2: warning, zero crossing error circuit 1-2
If the controller detects errors in the power supply, control may be lost over the fan speed. In this case,
the display will show a warning, and the fans will be controlled at maximum speed. The alarm is reset
automatically, so as to not affect the operation of the unit. If the expansion card is used, the warning relay
is activate)
dF1-2: warning, end defrost circuit 1-2 due to maximum time
If the defrost ends after the maximum time when end defrost by temperature or from external contact
has been selected, the unit displays the text dF1 for circuit 1 or dF2 for circuit 2. The message is cancelled
using the delete alarm procedure or when the next correct defrost cycle is completed. The buzzer and the
alarm relay are not activated. If the expansion card is used, the warning relay is activated (if used).
A1: antifreeze alarm outlet limit circuit 1
The alarm is only detected in water chillers (H01= 2, 3, 4, 5 or 6) by the evaporator water outlet
probe (B2/B6) or, if the electronic expansion driver (EVD) is connected to the tLAN, based on the
evaporation temperature sent by the driver. The evaporator water outlet temperature is compared
against the threshold A01, while the evaporation temperature is compared against the threshold A14. The
compressors in circuit 1 and the condenser fans in circuit 1 are immediately stopped, the buzzer and
alarm relay are activated, and the display starts flashing. If the µC2SE is in Standby, the alarm condition is
not detected, and only the heaters are managed. Reset depends on parameter P5:
1. in the event of automatic reset, the unit restarts automatically if the temperature is above the value
A01+A02 or A14+A02.
2. in the event of manual reset, the unit can restart manually even if the alarm is active.
After the time A03, if the alarm persists the unit will stop again.
For air/air units the parameter becomes the antifreeze-outlet limit alarm set point. If the outlet limit is
active, the freecooling damper is forced closed and the message SUL is shown on the display.
A2: antifreeze alarm circuit 2
As for A1 but relating to circuit 2
Ht: high temperature warning
This alarm is activated when the threshold is exceeded (read by B1), set for the parameter P16. It is
delayed at power ON by the parameter P17 and causes the activation of the alarm relay and the buzzer,
without deactivating the outputs. It is reset automatically when conditions that caused the alarm are no
longer present.
Lt: low temperature warning
For direct expansion units (H01=0, 1) the alarm is used to measure a low room temperature using probe
B1 or B2 (depending on par. A06).
The alarm may be reset manually or automatically, and depends on the parameter P05. If the expansion
is present, the corresponding relay is activated; in the event of µC2SE module only, the alarm relay will be
used.
AHt: high temperature warning when starting the system
The advice does not activate the relay, and displays the message “AHt”.
ALt: low temperature warning when starting the system
The advice does not activate the relay, and displays the message “ALt”.
ELS/EHS: warning, low/high power supply alarm
If the power supply voltage is too low or too high, the corresponding message is displayed. In these
cases, the correct operation of the µC2SE is no longer guaranteed. In the low voltage conditions only the
requests to deactivate the loads are effected. Any start-up requests remain pending. The high voltage
condition involves the deactivation of all the energised relays.
L: Low load warning
The warning does not activate the relay and displays the message “ L ”; reset is automatic.
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
39
ENGLISH
D1: defrost signal circuit 1
When the defrost is on circuit 1, the display shows the message D1.
D2: defrost signal circuit 2
When the defrost is on circuit 2, the display shows the message D2.
Driver
All the driver alarms on the µC2SE that stop the unit feature automatic reset. Consequently, the possibility
to select the automatic resetting of the entire system must be selected for the drivers by setting the
corresponding parameters. The µC2SE can send the Go Ahead command according to the normal
procedure for resetting the alarms from the keypad.
Ed1: tLan communication error with Driver 1
The alarm is generated after a fixed time (5 s) from when the µC2SE loses contact with Driver 1. In this
case, circuit 1 is disabled for safety reasons.
Ed2: tLan communication error with Driver 2 (expansion card)
As for Ed1, but relating to driver 2.
SH1: low superheat alarm circuit 1
The low superheat alarm for circuit 1, after a fixed time (5 s), inhibits the circuit 1 for safety reasons.
The risk is that the compressors will flood.
SH2: low superheat alarm circuit 2
As for SH1, but relating to driver 2
nO1: MOP warning (maximum operating pressure) circuit 1
The warning appears on the display and, if the expansion card is fitted, the corresponding relay is
activated.
nO2: MOP warning (maximum operating pressure) circuit 2
The warning appears on the display and, if the expansion card is fitted, the corresponding relay is
activated.
LO1: LOP warning (lowest operating pressure) circuit
The warning appears on the display and, if the expansion card is fitted, the corresponding relay is
activated.
LO2: LOP warning (lowest operating pressure) circuit 2
As for LO1, but relating to driver 2
HA1: high evaporator temperature warning circuit 1
The warning appears on the display and, if the expansion card is fitted, the corresponding relay is
activated.
HA2: high evaporator temperature warning circuit 2
As for HA1, but relating to driver 2.
EP1: EEPROM error driver 1
The circuit 1 is disabled for safety reasons, as the status of Driver 1 is not known.
EP2: EEPROM error driver 2
As for EP1, but relating to driver 2.
ES1: probe error driver 1
The circuit 1 is disabled for safety reasons, as the status of Driver 1 is not known.
ES2: probe error driver 2
As for ES1, but relating to driver 2.
EU1: EVD 1 error, valve open when starting
If when starting the system the Driver detects that the valve is still open, an alarm is sent to the µC2SE that
stops the compressors and the fans in the corresponding circuit.
EU2: EVD 2 error, valve open when starting
As for EU1, but relating to EVD 2.
Eb1: EVD 1 battery alarm
The EVD 1 battery alarm stops the compressors from starting so as to prevent the risk of liquid returning
to circuit 1, and disables the corresponding fans.
Eb2: EVD 2 battery alarm
The EVD 2 battery alarm stops the compressors from starting so as to avoid the risk of liquid returning to
circuit 2, and disables the corresponding fans.
40
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
ENGLISH
7. CONNECTIONS, ACCESSORIES AND OPTIONS
7.1 Connection diagram
Below is the connection diagram for the µC2SE.
Panel version
N
AUX10
AUX6
AUX7
AUX8
AUX9
Line
L
No6 C6/7C6/7C8/9 x
C10
No7 No8 No9 C8/9 x No10
Tx/Rx GND
Top
I/O
Bottom
GND Tx/Rx
GND B8 V+
G0 B5 B6 B7 ID10 ID8 ID6
G GND GND Y2 GND ID9 ID7
P
N
EV Driver
EV driver
ESP
pressure
probe
L
Line
EV driver
Expansion
board
N
Line
Tx/Rx
GND
AUX5
AUX2
AUX3
L
tLAN
AUX4
EV Driver
No1 C1/2 C1/2 C3/4 x
C5
No2 No3 No4 C3/4 x
No5
GND B4
G0 B1
B2
V+
B3 ID5 ID3 ID1
Key/SPV
G GND GND Y1 GND ID4 ID2
P
pressure
probe
To program key
RS485
option
N
Line
L
Fig. 7.a
To serial link
I/O layout
µC2SE
B1
B2
B3
B4 (universal)
ID1*
ID2*
ID3
ID4
ID5
Y1
C1/2-NO1
C1/2-NO2
C3/4-NO3
C3/4-NO4
C5-NO5
Expansion
B5
B6
B7
B8 (universal)
ID6**
ID7**
ID8
ID9
ID10
Y2
C6/7-NO6
C6/7-NO7
C8/9-NO8
C8/9-NO9
C10-NO10
Description
Programmable I/O
Programmable I/O
Programmable I/O
Programmable I/O
Programmable I/O (*= Any of the options for P08 can be selected (see Table 5.11))
Programmable I/O (*= Any of the options for P08 can be selected (see Table 5.11))
Programmable I/O
Programmable I/O
Programmable I/O
Programmable I/O
Programmable I/O
Programmable I/O
Programmable I/O
Programmable I/O
Programmable I/O
Table 7.a
Description
Programmable I/O
Programmable I/O
Programmable I/O
Programmable I/O
Programmable I/O (**= Any of the options for P08 can be selected, except for E/I and E/I delay.)
Programmable I/O (**= Any of the options for P08 can be selected, except for E/I and E/I delay.)
Programmable I/O
Programmable I/O
Programmable I/O
Programmable I/O
Programmable I/O
Programmable I/O
Programmable I/O
Programmable I/O
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
Table 7.b
41
7.2 Expansion card
ENGLISH
This device allows the µC2SE to manage the second refrigerant circuit on chillers, heat pumps and
condensing units with up to 4 hermetic compressors.
The following figure shows the connection diagram for the µC2SE expansion card, code MCH200002*.
N
EV Driver
Line
EV driver
L
No6 C6/7 C6/7 C8/9
x
No7 No8 No9 C8/9
x No10
C10
Tx/Rx GND
Top
Expansion board
Bottom
GND Tx/Rx
GND B8 V+
remote ON/OFF
high press.
multi funct.
low press.
multi funct.
G GND GND Y GND ID9 ID7
inlet probe
outlet probe
cond. probe
G0 B5 B6 B7 ID10 ID8 ID6
P
temperature
probe
digital
input
t-LAN
N
pressure
probe
L
Line
Fig. 7.b
NOTE: The expansion features two LEDs on the main board (to see these, remove the top or bottom
door), which display its status by the following messages:
ON
Board powered
green LED
red LED
Flashing
Board powered and serial communication with µC2SE in progress
1 flash: Probe fault alarm
2 flashes: Zero crossing alarm (mains frequency not detected)
3 flashes: Serial communication alarm with EVD
4 flashes: Serial communication alarm with µC2SE
Table 7.c
The alarms are displayed in sequence and are separated from each other by pauses.
7.3 EVD4*: Electronic expansion valve driver
This device is used to control electronic expansion valves. The device is connected to the µC2SE via a
tLAN serial line. The condensing pressure probe must be connected to the µC2SE, which then sends the
reading to the driver.
Nota: for all other information on the connections, refer to the EVD4* driver manual.
PHOENIX¡
MC1,5/3-ST-3,81
1 GND 2
COM NO
PHOENIX¡
GMSTB 2,5/2 ST
3 GND 4
EEV driver
FCSER00000
MOLEX¡ Mini-Fit
538-39-01-2140
G Vbat DI1 S4V S3 S2 S1
G0 GND DI2 S4I Vr1 Vr2 OC
GNX RT+ RT-
MOLEX¡ Mini-Fit
538-39-01-2060
Fig. 7.c
42
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
7.4 Fan speed control board (code MCHRTF*)
The phase cutting boards (code MCHRTF****) are used to control the speed of the condenser fans.
2
ENGLISH
1
IMPORTANT: The power supply to the µC2SE (G and G0) and the MCHRTF**** board must be in
phase. If, for example, the power supply to the µC2SE system is three-phase, make sure that the
primary of the transformer supplying the µC2SE board is connected to the same phase that
is connected to terminals N and L on the speed control board; therefore, do not use
380 Vac/24 Vac transformers to supply the controller if the phase and neutral are used to directly
power the speed control boards.
Connect the earth terminal (where envisaged) to the earth in the electrical panel.
GND Y
-
+
Key:
1.
2.
3.
3.
to µchiller;
earth;
to motor.
al motore.
LOAD
LINE
3
220 Vac
Fig. 7.d
to µchiller
7.5 Fan ON/OFF control board (code CONVONOFF0)
24 Vac Y GND
The relay boards (code CONVONOFF0) are used for the ON/OFF management of the condenser fans.
The control relay has a switchable power rating of 10 A at 250 Vac in AC1 (1/3 HP inductive).
1 2 3 4
5 6 7 8
No Com Nc
Fig. 7.e
to µchiller
7.6 PWM to 0 to 10Vdc (or 4 to 20 mA)conversion board for fans
(code CONV0/10A0)
24 Vac Y GND
1 2 3 4
The CONV0/10A0 boards convert the PWM signal at terminal Y on the µC2SE to a standard 0 to 10 Vdc (or
4 to 20 mA) signal. The FCS series three-phase controllers can be connected to the µC2SE without using
this module.
5 6 7 8
G0 0-10V G0 4-20mA
Fig. 7.f
7.7 Minimum and maximum fan speed calculation
LOAD
LINE
L
N
N
Vac?
The operation is now completed.
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
+
-
This procedure should only be performed when the fan speed control boards are sued (code MCHRTF*).
it must be stressed that if the ON/OFF modules (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.
Given the different types of motors existing on the market, the user must be able to set the voltages
supplied by the electronic board corresponding to the minimum and maximum speeds. In this regard
(and if the default values are not suitable), proceed as follows:
• set parameter F02= 3 and set F03 and F04 to zero;
• the condenser control set point (evaporator in HP mode) has been modified to take the output signal
to the maximum value (PWM);
• increase F04 until the fan operates at a sufficient speed (make sure that, after having stopped it, it can
rotate freely when released);
• “copy” this value to parameter F03; this sets the voltage for the minimum speed;
• connect a voltmeter (set for AC, 250V) between the two “L” terminals (the two external contacts);
• increase F04 until the voltage stabilises at around 2 Vac (inductive motors) or 1.6, 1.7 Vac (capacitive
motors). Once the value has been found, it will be evident that even when increasing F04 the voltage
no longer decreases. In any case do not increase F04 further so as to avoid damaging the motor;
• restore the correct condenser set point (evaporator in HP mode).
Fig. 7.g
43
L
7.8 Programming key (code PSOPZKEYA0)
ENGLISH
The programming keys PSOPZKEY00 and PSOPZKEYA0 for CAREL controllers are used for copying the
complete set parameters for µC2SE.
The keys must be connected to the connector (4 pin AMP) fitted on the controllers, and can work with
the instruments ON or OFF, as indicated in the operating instructions for the specific controller.
The two main functions (upload/download) that can be selected through two dip-switches (which are
placed under the battery cover). They are:
• Loading to the key the parameters of a controller (UPLOAD);
• Copying from the key to one or more controllers (DOWNLOAD).
Fig. 7.h
Warning: the copying of the parameters is allowed only between instruments with the same code.
Data loading operation to the key is always allowed. To make identification of the key easier CAREL has
inserted a label on which you can describe the loaded programming or the machine to which you are
referring.
Fig. 7.i
IMPORTANT NOTE: the key can be used only with controllers µC2SE that have the same Firmware
version.
UPLOAD - copying the parameters from an instrument to the key:
• open the rear hatch of the key and place the two dip-switches in the OFF position (see Fig. 7.j.a). Close
the hatch;
• connect the key to the connector of the instrument;
• press the button on the key and keep it pressed, checking the LED signal sequence: at first it is red,
after a few seconds it becomes green;
• if the sequence of signals is as indicated above, the copying operation has been completed correctly
(green LED ON), the button can be released and the key disconnected from the instrument; in case of
different signals: if the green LED doesn’t turn on or if there are some flashes, there’s a problem. Refer
to the corresponding table for the meaning of the signals.
Fig. 7.j.a
DOWNLOAD - copying the parameters from the key to the instrument:
• open the rear hatch of the key and place the dip-switch n. 1 in the OFF position and the dip-switch n.
2 in the ON position (see Fig. 7.j.b). Close the hatch;
• connect the key to the connector of the instrument;
• press the button on the key and keep it pressed, checking the LED signal sequence: at first it is red,
after a few seconds it becomes green;
• if the sequence of signals is as indicated above, the copying operation has been completed correctly
(green LED ON), the button can be released; after a few seconds the LED turns off and the key can be
disconnected from the instrument;
• in case of different signals: if the green LED doesn’t turn on or if there are some flashes there’s a
problem. Refer to the corresponding table for the meaning of the signals.
The operation takes maximum 10 seconds to complete. If after this period the completed operation signal
hasn’t yet appeared, i.e. the green LED ON, try releasing and pressing the button again. In the event of
flashes, refer to the corresponding table for the meaning of the signals.
Fig. 7.j.b
LED signal
error
red LED flashing Flat batteries at the
beginning of the
copying
green LED
Flat batteries at the end
flashing
of the copying (only on
PSOPZKEY00)
Alternate red/
Not compatible
green LED
instrument
flashing
(orange signal)
red and green
Copying error
LEDs ON
red LED always Data transmission error
ON
LEDs OFF
Batteries disconnected
Power supply not
connected
meaning and solution
The batteries are flat, the copying cannot be carried out.
Replace the battery (only on PSOPZKEY00).
The copying operation has been carried out correctly but at the end
of the operation the voltage of the batteries is low.
It is advisable to replace the batteries.
The setup of the parameters cannot be copied since the model of
the connected parameters is not compatible. Such error happens
only with the DOWNLOAD function, check the controller code and
make the copy only on compatible codes.
Error in the copied data. Repeat the operation; if the problem
persists, check the batteries and the connections of the key.
The copying operation hasn’t been completed because of serious
data transmission or copying errors. Repeat the operation, if the
problem persists, check the batteries and the connections of the key.
Check the batteries (for the PSOPZKEY00)
Check the power supply (for the PSOPZKEYA0)
Table 7.d
Technical specifications
Power supply to the
PSOPZKEY00
Power supply to the
PSOPZKEYA0
Operating conditions
Storage conditions
Case
- Use three 1.5 V 190 mA batteries (Duracell D357H or equivalent)
- Maximum current supplied 50 mA max.
- switching power supply:
Input 100 to 240 V~; (-10%, +10%); 50/60 Hz; 90 mA. Output: 5 Vdc; 650 mA
0T50°C r.H. <90% non-condensing
-20T70°C r.H. <90% non-condensing
Plastic, dimensions 42x105x18 mm including prod and connector Figs. 1 and 2
Table 7.e
(Here we have dealt only with the base functions of the instrument. For the remaining specific functions, see the
manual of the instrument that is being used).
44
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
7.9 RS485 serial options
ENGLISH
RS485 serial option for µC2SE panel version (code MCH2004850)
The MCH2004850 serial option is used to connect the µC2SE controller to a supervisor network via a
standard RS485 serial line.
This option uses the input normally associated with the programming key, which has the dual function of
key connector/serial communication port.
Fig. 7.k
7.10 Terminals
The µC²SE features the following user interfaces:
Remote terminal
The remote terminal allows the complete configuration of the µC2SE from a remote position. The buttons
and indications on the display faithfully reproduce the µC2SE user interface. In addition, PlantVisor can be
connected to the remote terminal using the special accessory.
Product code:
MCH200TP00 for panel installation
MCH200TW00 for built-in assembly
For further information see the instruction sheet +050001065.
Fig. 7.l
µAD
µAD is the µC2SE room terminal.
This terminal, fitted with built-in temperature and humidity probes, controls the temperature-humidity
conditions in the environment where its is installed, interacting with the units controlled by the µC2SE.
The µAD can be used to set time bands, the temperature and humidity set point, switch the system on/off
and change operating mode simply and intuitively.
Product code:
ADMA001000: with NTC probe
ADMB001010: with NTC probe, RTC and buzzer
ADMG001010: with NTC and humidity probe, RTC and buzzer
ADMH001010: with NTC and humidity probe, RTC, buzzer and backlighting
For further information see the instruction sheet +05000750 and the manual +030220465.
Fig. 7.m
µAM
µAM is the µArea controller compatible with the µC2SE.
This can control up to 10 fan coils (fitted with the e-droFAN electronic controller). By analysing the
temperature-humidity conditions in the different rooms, µAM optimises the temperature of the water
produced by the chiller/HP, improving power consumption, performance and comfort.
In addition, the µAM centralises the data, such as set point, heat/cool mode and on/off for the individual
fan coil and the entire system, including time bands.
Product code:
ADEC001010: with NTC probe, RTC, buzzer and backlighting
ADEH001010: cwith NTC and humidity probe, RTC, buzzer and backlighting
Fig. 7.n
For further information see the instruction sheet +050000740 and the manual +030220460.
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
45
ENGLISH
8. DIMENSIONS
The following are the mechanical dimensions of each component in the µC2SE controller; all the values
are expressed in millimetres.
Note: the dimensions include the free connectors inserted.
33
MCH20000* µC2SE panel mounting version
75
64
74
drilling template
71x29 mm
comp
x100
PRG
Sel
panel mounting
overall dimensions 91,5x36x5 mm
Fig. 8.a
CONVONOFF0 and CONV0/10 A modules
88
44
110
Expansion board for µC2SE
Expansio
n board
Expansion board
DIN rail mounting
36
60
11
60
70
Fig. 8.c
Fig. 8.b
24
RS485 serial card: codeMCH2004850
5
31
3
56
59
75
85
5
Fig. 8.d
46
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
Model
MCHRTF04C0
MCHRTF08C0
MCHRTF12C0
A (component side)
43
75
75
B
100
100
100
C
40
58
58
D
50
82
82
ENGLISH
MCHRTF series single-phase speed controllers
E
107
107
107
Note: the version with screw teminals code MCHRTF*D0 is available on request
Table 8.a
D
A
D
A
C
8 e 12 A
4A
B E
Fig. 8.e
Model
MCHRTF10C0
Table 8.b
90
3
12.5
74.5
19
19
50
35.5
84
64
Ø4
15
29.5
3
74.5
12.5
Fig. 8.f
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
47
C
B E
ENGLISH
9. CODES
Description
µC2SE single circuit, 2 compressors, panel mounting
µC2SE single circuit, 2 compressors, panel mounting (20 pcs. multiple package)
µC2SE expansion board for 2nd. circuit maximum 4 compressors
µC2SE expansion board for 2nd. circuit maximum 4 compressors (10 pcs. multiple package)
RS485 optional board for µC2SE panel version
Programming key for µC2SE
ON/OFF fan card (only screw terminals)
PWM - 0 to 10 V fan card (only screw terminals)
Temperature probes for regulation or condensation control
***depending on the length (015= 1.5 m, 030= 3 m, 060=6 m)
Pressure probes for condensing pressure control
** depending on the pressure (13= 150 PSI, 23= 75 PSI, 33= 500 PSI)
Connectors kit for code MCH2000001 (multiple package 20 pcs)
Connectors kit for code MCH2000001 (multiple package 10 pcs)
Minifit connectors kit + 1 meter length for code MCH2**
Minifit connectors kit + 2 meter length for code MCH2**
Minifit connectors kit + 3 meter length for code MCH2**
Remote terminal for MCH20000** for panel installation MCH200TP0*
Remote terminal for MCH20000** for wall-mounting MCH200TW0*
Supervisor serial connection kit for remote terminal
Fan speed PWM 4 A/230 Vac
Fan speed PWM 8 A/230 Vac
Fan speed PWM 12 A/230 Vac
Fan speed PWM 10 A/230 Vac 1 Pc. Nor. Ind.
Fan speed PWM 10 A/230 Vac 10 Pc. Nor. Ind.
Code
MCH2000050
MCH2000051
MCH2000020
MCH2000021
MCH2004850
PSOPZKEY00
CONVONOFF0
CONV0/10A0
NTC***WP00
SPK*R*
MCH2CON001
MCH2CON021
MCHSMLCAB0
MCHSMLCAB2
MCHSMLCAB3
MCH200TP0*
MCH200TW0*
MCH200TSV0
MCHRTF04C0
MCHRTF08C0
MCHRTF12C0
MCHRTF10C0
MCHRTF10C1
Table 9.a
10. TECHNICAL SPECIFICATIONS AND SOFTWARE UPDATES
10.1 Technical specifications
Electrical specifications
In the following specifications “Group A” defines the grouping of the following outputs: valve, pump,
compressor, heater.
Power supply
24 Vac, range +10/–15 %; 50/60 Hz
Maximum power input: 3W
Fuse (compulsory) in series with the power supply to the µC2SE: 315mAT
12 pin connector
Max. current 2 A for each relay output, extendable to 3 A for one single output
Relays
Max current at 250 Vac: EN60730: resistive: 3A, Inductive: 2A cos =0.4 60,000
cycles
UL: Resistive: 3A, 1 FLA, 6 LRA cos =0.4 30,000 cycles
For further information refer to the characteristics shown in Figure 10.a
Minimum interval between communications (each relay): 12 s (the manufacturer
of the unit that the device is integrated into must ensure the correct configuration
so as to respond to this specification
Type of microswitching: 1 C
Insulation between relays in group A: functional
Insulation between the relays in group A and the very low voltage parts:
reinforced
Insulation between relays in group A and the signal relays: primary
Insulation between the signal relays and the very low voltage parts: reinforced
Insulation between the relays and the front panel: reinforced
Digital inputs
Electrical standard: voltage-free contacts
Closing current to earth: 5 mA
Maximum closing resistance: 50 W
Analogue inputs
B1, B2, B3, B4: NTC CAREL temperature probes (10 kW at 25 °C)
The response time depends on the component used, typical value 90 s
B4: NTC temp. probes (10 kW at 25 °C) or CAREL 0 to 5 V ratiometric pressure
probes SPKT00**R*
Fan output
Control signal for CAREL modules MCHRTF****, CONVONOFF* and
CONV0/10A*
Phase width modulation (settable width) or modulation of the duty cycle
No-load voltage: 5V ± 10%
Short-circuit current: 30 mA
Minimum output load: 1 kW
Front panel index of protection IP55
Storage conditions
-10T70 °C – humidity 80 % rH non-condensing
Operating conditions
-10T55 °C – humidity <90 % rH non-condensing
Degree of pollution
Normal
Cat. of resist. to heat and fire D (RU94 V0)
PTI of the insulating materials All the insulating materials have PTI250 V
Software class and structure
A
Period of electric stress across Long
insulating parts
300
number of operations (x 104)
200
120 Vac
100
250 Vac 30 Vdc
AC 120 V cosø =0.7
50
AC 250 V cosø =0.7
30
20
10
5
3
2
1
0
30 Vdc
120 Vac cosø =0.4
250 Vac cosø =0.4
30 Vdc
1
2
3
4
5
current on contacts (A)
Fig. 10.a
Homologations
CE/RU (File EI98839 sez.16)
Table10.a
Nota: all the relays must have the common terminals (C1/2, C3/4, C6/7, C8/9) connected together.
48
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
Functional characteristics
Pressure measurement error
Temperature probes: range -40T80 °C, 0.1 °C
Range -20T20 °C, ±0.5 °C (excluding probe)
Range -40T80 °C, ±1.5 °C (excluding probe)
The % error with a voltage reading with a range of input from 0.5 to 4.5
is ± 2% (excluding probe).
The error in the converted value may vary according to the settings of
parameters /9, /10, /11, /12
ENGLISH
Resolution of the analogue inputs
Temperature measurement error
Table 10.b
Characteristics of the connectors
The connectors may be purchased using CAREL code (MCHCON0***) or from the manufacturer Molex®
Molex® codes of the connector
39-01-2120
39-01-2140
Number of pins
12
14
Table 10.c
Max. number of insertion/removal cycles for the connectors: 25 cycles
Code of the contacts according to the cross-section of the connection cables to the 12- and 14-pin
connectors (use the special Molex® tool code 69008-0724 for crimping
Molex® code of the contact
39-00-0077
39-00-0038
39-00-0046
Cross-section of cables allowed
AWG16 (1,308 mm2)
AWG18-24 (0,823...0,205 mm2)
AWG22-28 (0,324...0,081 mm2)
Table 10.d
In addition, the pre-wired kits MCHSMLC*** are also available
WARNINGS
• If one transformer is used to supply both the µC2SE and the accessories, all the G0 terminals on the
various controllers or the various boards must be connected to the same terminal on the secondary,
and all the G terminals to the other terminal on the secondary, so as to avoid damaging the
instrument;
• For use in residential environments, use shielded cable (two wires + shield earthed at both ends, AWG
20-22) for the tLAN connections (EN 55014-1).
• Avoid short-circuits between V+ and GND so as to not damage the instrument;
• Perform all the maintenance and installation operations when the unit is not connected to the power
supply;
• Separate the power cables (relay outputs) from the cables corresponding to the probes, digital inputs
and serial line;
• Use a transformer dedicated exclusively to the electronic controllers for the power supply.
Protection against electric shock and maintenance warnings
The system made up of the control board (MCH200003*) and the other optional boards (MCH200002*,
MCH200485*, MCHRTF****, CONVONOFF*, CONV0/10A*, EVD000040*) represents a control device to
be integrated into class 1 or class 2 appliances.
The class of protection against electric shock depends on how the control device is integrated into the
unit built by the manufacturer.
Disconnect power before working on the board during assembly, maintenance and replacement.
The protection against short circuits must be guaranteed by the manufacturer of the appliance that the
controller will be fitted on.
Maximum length of the NTC/ratiometric probe
NTC/ratiometric probe connection cables
digital input connection cables
power output connection cables
fan control output connection cables
power cables
10 m
10 m
5m
5m
3m
Table 10.e
10.2 Software updates
10.2.1 Notes for version 1.1
First release.
10.2.2 Notes for version 1.2
Optimised use of the programming key.
10.2.3 Notes for version 1.3
Implemented direct current operation.
Use EXP. version 1.5 or higher.
10.2.4 Notes for version 1.4
Implemented a differential relating to the working set point for electric heaters in air- and water-source
units. Implemented cooling only air-source unit with electrical heaters operating in heating mode only.
Implemented new logic for the activation of the alarm relays.
Implemented new logic for the management of the high pressure alarm.
Implemented management of minimum damper opening.
Implemented damper inactivity time in freecooling or freeheating mode.
Optimised management of damper closing for minimum outlet temperature limit.
Implemented alarm reset from µAD.
10.2.5 Notes for version 1.6
Improved Modbus communication with supervisory system
10.2.6 Notes for version 1.7
Implemented second antifreeze set point (A14)
µC2SE process chiller +030220416 - rel. 1.1 - 27.04.2010
49
Notes:
CAREL reserves the right to modify the features of its products without prior notice
CAREL S.p.A.
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 chiller process +030220416 - rel. 1.1 - 27.04.2010
Agenzia/Agency: