DIXELL XC450CX Digital Temperature Controller Instruction Manual

XC450CX
(v. 3.5)

BEFORE PROCEEDING

1.1 Check the sw rel. of the XC450CX

1. Look at the SW rel. of XC64D printed on the label of the controller.
2. If the SW release is 3.5, proceed with this manual otherwise contact Dixell to get the right manual.

GENERAL WARNING

2.1 Please read before using this manual

• This manual is part of the product and should be kept near the instrument for easy and quick reference.
• The instrument shall not be used for purposes different from those described hereunder. It cannot be used as a safety device.
• Check the application limits before proceeding.
• Dixell Srl reserves the right to change the composition of its products, even without notice, ensuring the same and unchanged functionality.

2.2 Safety Precautions

• Check the supply voltage is correct before connecting the instrument.
• Do not expose to water or moisture: use the controller only within the operating limits avoiding sudden temperature changes with high atmospheric humidity to prevent formation of condensation
• Warning: disconnect all electrical connections before any kind of maintenance.
• The instrument must not be opened.
• In case of failure or faulty operation send the instrument back to the distributor or to “Dixell S.r.l.” (See address) with a detailed description of the fault.
• Consider the maximum current which can be applied to each relay (see Technical Data).
• Ensure that the wires for probes, loads and the power supply are separated and far enough from each other, without crossing or intertwining.
• Fit the probe where it is not accessible by the end user.
• In case of applications in industrial environments, the use of mains filters (our mod. FT1) in parallel with inductive loads could be useful.

General description

The XC450CX is designed to manage both compressors and fans in a condensing system such as a pack. The compressors can be scroll or Stream, simple or multistage.
It’s possible to manage up to 2 suction circuits with a common condenser.
Control is by means of a neutral zone and is based on the pressure or temperature sensed in the LP suction (compressors) and HP (condenser) circuits. A special algorithm balances the run hours of the compressors to distribute the work load uniformly.
The controllers can convert both LP and HP pressures and displays them as temperatures.
The front panel offers complete information on the system’s status by displaying the suction and condenser pressure (temperatures), the status of the loads, possible alarms or maintenance conditions.
Each load has its own alarm input that is able to stop it when activated. To guarantee the total system’s safety, there are also two inputs for low and high pressure switches: when these are activated, the system is stopped.
By means of the HOT KEY the controller can be easy programmed at power on.
The controller can be connected to the X-WEB, controlling and monitoring system, thanks to the RS485 serial output, using the standard ModBus RTU protocol.

PROBES RELATED TO THE XC450CX

4.1 PP07, PP11, PP30 PP50: 4÷20mA pressure transducers

4.2 NP4-67: pipe mounting temperature probe

The NP4-67 temperature probe can be used on the discharge line to monitor the discharge temperature of the Digital Scroll compressor.
NP4-67 1.5MT NTC probe Measurement
range: -40+110°C,
Cable 1,5mt
Code BN609001 52

WIRING & ELECTRICAL CONNECTIONS

5.1 General warnings
Before connecting cables make sure the power supply complies with the instrument’s requirements.
Separate the probe cables from the power supply cables, from the outputs and the power connections.
Do not exceed the maximum current allowed on each relay 5A resistive, in case of heavier loads use a suitable external relay.

5.2 Wiring connections

NOTE
24V version: use terminals 1-2 for power supply.
5.3 Probes connection
5.3.1 General warnings
Pressure probe (4 – 20mAor ratiometric): respect the polarity. If using terminal ends be sure there are no bear parts which could cause short circuiting or introduce noise disturbance at high frequencies. To minimize the induced disturbances use shielded cables  with the shield connected to earth.
Temperature probe: it is recommended to place the temperature probe away from direct air streams to correctly measure the temperature.
5.3.2 Probe wirings
Low voltage side : Keep the cables away from the power cables. Use shielded cable to lengthen the cables.
NOTE1: The PIN 7 is the common line for the temperature probes
NOTE2: The PIN 4 gives a 12Vdc supply for the 4-20mA pressure transducers

PP07 PP11, PP30, PP50 4÷20mA pressure transducers
respect the polarity.
Suction (P1C = Cur)
Brown (+) to terminal 4 ; white (-) to terminal 5
Condenser (P2C = Cur)
Brown (+) to terminal 4 ; white (-) to terminal 6|
---|---
Temperature probes (NTC 10K)
Suction: 5-7 (P1C = NTC)
Condenser: 6-7 (P2C =NTC)|
Ratiometric transducers (0.5÷4.5Vdc)
Suction (P1C = 0-5)
5 (In); 7(+); 3 (gnd)
Condenser (P2C =0-5)
6 (In); 7(+); 3 (gnd)|

5.4 LOAD CONNECTIONS

5.5 SAFETY AND CONFIGURABLE DIGITAL INPUTS – FREE VOLTAGE
5.5.1 Loads safety inputs
Controller has 6 configurable digital inputs, free voltage.
Each digital input can be set by the related parameter iF01,.. iF07.
The first 5 digital inputs are factory pre-set to operate as safety input for loads.
Each input must collect the status of the safety devices related to the compressor such as thermistors, pressure switches etc.
When this input is activated the correspondence load is switched off and not considered for the regulation.
The correspondence between loads (compressors or fans) and safety inputs is the following

5.6 Analog output connection
The controller supply up to 2 analog outputs, terminals, kind of output and functionality are shown in the following table

| Terminals| Related parameter
---|---|---
Analog output 1| 14[-] — 15[+].| AOC: Kind of signal (4-20mA/0-10V) AOF: function
Analog output 2| 14[-] — 16[+].| 2AOC: Kind of signal (4-20mA/0-10V) 2A0F: function

5.7 How to connect monitoring system – RS485 Serial line
The XC450CX can be connected to a monitoring system thanks to the serial output.
To convert the TTL to RS485 signal, the XJ485CX has to be used.
The XJ485CX is a TTL/RS485 external converter. Insert it into the TTL receptacle to convert the TTL output into a RS485 (+) and (-) signal for the monitoring system MODBUS_RTU compatible. (XWEB).
The Adr parameter is the number to identify each electronic board. Address duplication is not permitted, in this case the communication with monitoring system is not guaranteed (the Adr is also the ModBUS address).

Mounting & installation

The instruments are suitable only for internal use. Instruments shall be mounted on panel, in a 29×71 mm hole, and fixed using the special brackets supplied.
The ambient operating temperature range is between -10÷60°C.
Avoid locations subject to heavy vibration, corrosive gases or excessive dirt. The same applies to the probes. Ensure ventilation around the instrument.

First installation

At first installation, it’s necessary the following:

1. Select the kind of gas.
2. Set the range of the pressure probes.

In the following paragraph a short cut for the above operations.
Chapters 11 Parameters programming and 17 will show in detail these operations.

7.1 How to set the kind of gas
The kind of gas is set by the parameter FtyP.
The controller has memorized the relation between temperature and pressure for some gases.

The pre-set gas is: r448. (FtyP=r448)
If another gas is used, act as in the following:

1. Enter the Programming mode by pressing the Set and DOWN key for 3s.
2.  Select the “Pr2” parameter. Then enter the password 3 2 1 0.
3. Select the FtyP, kind of gas, parameter.
4. Press the “SET” key: the value of the parameter will start blinking.
5. Use “UP” or “DOWN” to change the gas among the following:
6. r22= r22; r32 = r32; r134=r134, r290 = r290; r404=R404A; 407A = r407A; 407C= r407C; 407F= r407F; 410= r410; r448 = r448A; r449 = r449A, r450 = r450A; r452 = r452A; 507=R507; r513=R513; 14EE= r1234ze; CO2= CO2; 515b () = r515b; 454A  ()= R454A; 454b ()= R454B; 454C ()= R454B; 455A ()= R455A; 14YF ()= R1234ze (*) Present only in 3.5h or following release
7. Press “SET” to store the new value and move to the following parameter.
   To exit: Press SET + UP or wait 30s without pressing a key.

NOTE: the set value is stored even when the procedure is exited by waiting the time-out to expire.

7.2 How to set the range of the pressure probes
If an instrument with the following part number is used: XC450CX – xxxxF, it is pre-set to work with pressure probe with the following range:
Suction Probe : -0.5 ÷11.0 bar (relative pressure);
Discharge Probe : 0÷30.0 bar (relative pressure)
If the probes you’re using have a different range act as in the following:
To set the pressure range of the Probe 1 (suction probe) use the parameter:
PA04: Adjustment of read out corresponding to 4mA (0.5V)
PA20: Adjustment of read out corresponding to 20mA (4.5V)
To set the pressure range of the Probe 2 (Condenser probe) use the parameter:
FA04: Adjustment of read out corresponding to 4mA (0.5V)
FA20: Adjustment of read out corresponding to 20mA (4.5V)
Practically these parameters have to be set with the start and end scale of the probe range.

How to do:

1. Enter the Programming mode by pressing the Set and DOWN key for 3s.
2. Select the “Pr2” parameter. Then enter the password 3 2 1 0.
3. Select the PA04, adjustment of read out corresponding to 4mA (0.5V), parameter.
4. Press the “SET” key: the value of the parameter will start blinking.
5. Set the lower value of the probe range.
6. Push the SET key to confirm the value. The PA20: adjustment of read out corresponding to 20mA (4.5V) parameter will be displayed.
7. Set the higher value of the range.
8. Push the SET key to confirm the value. Next parameter will be displayed.

Do the same things for the Probe 2, FA04, FA20 parameters.

User interface

8.1 Displaying

loads
– Measurement unit
– Alarm or status Icons

8.2 Keyboard
SET (SET)
Standard visualization: to see or modify the set point. In programming mode it selects a parameter or confirms an operation.
Alarm menu: By holding it pressed for 3s, the current alarm is erased.
▲(UP): In programming mode: it browses the parameter codes or increases the displayed value.
With Hot key inserted: it starts the Hot key programming procedure.
To access the INFO menu: push and release it to access the INFO menu.
▼(DOWN): In programming mode: it browses the parameter codes or decreases the displayed value.
Manual restart of loads: By holding it pressed for 3s, it switches on again loads previous locked by a safety digital input alarm.
MAINTEINANCE/CLOCK: To display the loads running hours By holding it pressed for 3s the Maintaining menu is entered

KEY COMBINATIONS
+ To lock and unlock the keyboard.
SET + To enter the programming mode.
SET + To exit the programming mode.

8.3 Icons

1 (2Hz). or Load 1 in maintenance status (2Hz).
2| ON| Load 2 on
2| Flashing| Load 2 is waiting to start (1HZ). or digital input alarm for Load 2 (2Hz). or Load 2 in maintenance status (2Hz).
3| ON| Load 3 on
3| Flashing| Load 3 is waiting to start (1HZ). or digital input alarm for Load 3 (2Hz). o Load 3 in maintenance status (2Hz).
4| ON| Load 4 on
4| Flashing| Load 4 is waiting to start (1HZ). or digital input alarm for Load 4 (2Hz). o Load 4 in maintenance status (2Hz).
5| ON| Load 5 on
5| Flashing| Load 5 is waiting to start (1HZ). or digital input alarm for Load 5 (2Hz). o Load 5 in maintenance status (2Hz).
| ON| The Maintenance menu has been entered
| Flashing| One or more loads have been placed in maintenance status
LP| ON| Low pressure switch alarm
HP| ON| High pressure switch alarm
| ON| Alarm is happening
| ON| All the stored alarms have been seen.
| Flashing| A new alarm has happened
| ON| Energy saving activated

How to see and modify the set point(s)

9.1 How to see the set point of compressors and/or fans
If the controller is managing both compressors and fans, both the set points are displayed in sequence, otherwise only the set point of the enabled section will be displayed.

1. Push and release the SET key;
2. The Lower display will show the “SEtC” label, while the Upper display will show its value.
3. If second suction is configured, by pushing again the SET key the Lower display will show the “StC2” label, while the Upper display will show its value
4. To see the fan set point, push again the SET key.
5. The Lower display will show the “SEtF” label, while the Upper display will show the fan set point.
   To exit: push the SET key or wait for 30 without pressing any keys.

9.2 How to modify the set point of compressors and/or fans
**WARNING: before setting the target set points for the first time, check and, if necessary, modify the type of refrigerant gas (par. FtyP) and the default unit of measurement (par. dEU) for compressors and fans **

PRE-ACTION

1. Set the kind of refrigerant by means of the FtyP parameter (see 7.1 How to set the kind of gas)
2. Set the measurement unit (dEU par.).
3. Check and if necessary modify the set point limits (LSE and HSE par.).

PROCEDURE

1. Push the SET key for more than 2 seconds;
2. The Lower display will show the “SEtC1” label, will the Upper display will show its value flashing.
3. To change the suction set point value, push the or within 30s.
4. To memorize the new value and pass to the fan set point, push the SET key.
5. If the second circuit is enabled the Lower display will show the “SEtC2” label, will the Upper display will show its value flashing.
6. To change the suction set point value, push the or within 30s.
7. To memorize the new value and pass to the fan set point, push the SET key.
8. The Lower display will show the “SEtF” label, will the Upper display will show the fan set point flashing.
9. To change its value, push the or within 30s.

To exit: push the SET key or wait for 30 without pressing any keys.

The INFO menu

The controller can display some information directly from the main menu.
The INFO menu is accessible by pushing and releasing the UP key:
Here below the list of the information that can be displayed:
NOTE: this information is displayed only if the related function is enabled

• P1t: temperature value of the P1 probe

• P1P: pressure value of the P1 probe

• P2t: temperature value of the P2 probe

• P2P: pressure value of the P2 probe (if P2 present)

• P4t: temperature value of the P4 probe (if P4 present)

• LInJ: status of the injection output (“On” – “OFF”), This information is available only if one relay, oA2 ÷oA4 is set as “Lin”.

• SEtd: value of the Dynamic Set point.
  This information is available only if the Dynamic set point function is enabled (par. dSEP ≠ nP)

• AO1 Percentage of the analog output 1 (4-20mA or 0-10V).

• This information is always available

• AO2: Percentage of the analog output 2 (4-20mA or 0-10V).

• This information is always available

• SSC1: Supervising Set for circuit 1, if supervising system is sending the set point to the controller

• SSC2: Supervising Set for circuit 2, if supervising system is sending the set point to the controller

• SStF: Supervising Set for fan, if supervising system is sending the set point to the controller

Parameters programming

11.1 How to enter the “Pr1” parameter list
To enter the “Pr1” parameter list, user accessible, operate as follows:

1. Hold pressed the SET and DOWN key for 3s.
2. The controller displays the name of the parameter in the Lower display, its value on the Upper display.
3. Press the “SET” key: the value of the parameter will start blinking.
4. Use “UP” or “DOWN” to change the value.
5. Press “SET” to store the new value and move to the following parameter.

To exit: Press SET + UP or wait 30s without pressing a key.
NOTE: the set value is stored even when the procedure is exited by waiting the time-out to expire.

11.2 How to enter in parameters list “Pr2”
The “Pr2” parameter list is protected by a security code (Password).
SECURITY CODE is 3210
To access parameters in “Pr2”:

1. Enter the “Pr1” level.
2. Select “Pr2” parameter and press the “SET” key.
3. The flashing value “0 —” is displayed.
4. Use or to input the security code and confirm the figure by pressing “SET” key.
5. Repeat operations 2 and 3 for the other digits.

NOTE: each parameter in “Pr2” can be removed or put into “Pr1” (user level) by pressing “SET” + n. When a parameter is present also in “Pr1” decimal point of the lower display is on.

11.3 How to change parameter values

1. Enter the Programming mode.
2. Select the required parameter with or .
3. Press the “SET” key the value start blinking.
4. Use or to change its value.
5. Press “SET” to store the new value and move to the following parameter.

To exit: Press SET + UP or wait 15s without pressing a key.
NOTE: the new programming is stored even when the procedure is exited by waiting the time-out.

How to disabled an output

To disabled an output during a maintenance session means to exclude the output from the regulation.
12.1 How to disabled an output during a maintenance session.

1. Push the MAINTENANCE/CLOCK ( ) key for 3s.

2. The LED’s of the first output is switched on, the Lower display shows the “StA” label, while the Upper display shows the “On” label if the first output is enabled, or the “oFF” label if the output is disabled for a maintenance section.
   With compressor with more steps all the LED’s linked to the compressor and the valves are switched on..

3. Select the output by pressing the UP or DOWN key.

4. To modify the status of the output: push the SET key, the status of the output starts flashing, then push the UP or DOWN to pass from “On” to “OFF” and vice versa.

5. Push the SET key to confirm the status and pass to the next output..

To exit: push the CLOCK key or wait 30 sec

12.2 Output disabled signaling.
If an output is disabled its led blinks (2 Hz)

12.3 Regulation with some outputs disabled.
If some outputs are disabled they don’t take part to the regulation, so the regulation goes on with the other outputs.

Running hours of loads

13.1 How to display the running hours of a load.
The controller memorizes the running hours of each load.
To see how long a load has been working follow this procedure:

1. Press and release the “MAINTENANCE/CLOCK ( )” key.
2. The LED of the first output is switched on, the Upper Display shows the “HUr” label, while the Lower Display shows the shows the running hours of the first output.
3. To see the running hours of the following load press the UP key.

To exit: push the key or wait 30 sec

13.2 How to reset the running hours of a load.

1. Display the running hour according to the above procedure.
2. Select the load by pressing the UP key.
3. Push the SET key (immediately on the lower display the rSt label is displayed).
4. Hold pushed the key for some seconds till the “rSt” label starts flashing and the lower display shows zero.

To exit: push the CLOCK key or wait 30 sec
NOTE: if the SET key is released within 2s, the controller reverts to display the running hours of the selected loads.

Alarm Menu

The controller memorizes the last 20 alarms happened, together with their duration.
To see the alarm codes see. par. 23
14.1 How to see the alarms

1. Push the Alarm key.
2. The last alarm happened is showed on the Upper display, while the lower display shows its number.
3. Push again the o key and the other alarm are displayed starting from the most recent.
4. To see the alarm duration and push the SET key.
5. By pushing again the o or SET key the next alarm is displayed.

Alarms erasing.

1. Enter the Alarm Menu.
2. To erase the displayed alarm push the “SET” key till the “rSt” label will be displayed in the Lower Display, NOTE the running alarms cannot be erased.
3. To erase the whole Alarm Menu, hold pressed the “SET” key for 10s.

Keyboard locking

15.1 How to lock the keyboard

1. Keep the and keys pressed together for more than 3 s the o and n keys.
2. The “POF” message will be displayed and the keyboard is locked. At this point it is only possible to view the set point or enter the HACCP menu.

15.2 To unlock the keyboard
Keep the and keys pressed together for more than 3s till the “POn” flashing message appears.

Use of the programming “HOT KEY “

16.1 How to program a hot key from the instrument (UPLOAD)

1. Program one controller with the front keypad.
2. When the controller is ON, insert the “Hot key” and push o key; the “uPL” message appears followed a by flashing “End”
3. Push “SET” key and the End will stop flashing.
4. Turn OFF the instrument remove the “Hot Key”, then turn it ON again.

NOTE: the “Err” message is displayed for failed programming. In this case push again o key if you want to restart the upload again or remove the “Hot key” to abort the operation.

16.2 How to program an instrument using a hot key (DOWNLOAD)

1. Turn OFF the instrument.
2. Insert a programmed “Hot Key” into the 5 PIN receptacle and then turn the Controller ON.
3. Automatically the parameter list of the “Hot Key” is downloaded into the Controller memory, the “doL” message is blinking followed a by flashing “End”.
4. After 10 seconds the instrument will restart working with the new parameters.
5. Remove the “Hot Key”..

NOTE the message “Err” is displayed for failed programming. In this case turn the unit off and then on if you want to restart the download again or remove the “Hot key” to abort the operation.
The unit can UPLOAD or DOWNLOAD the parameter list from its own E2 internal memory to the “Hot Key” and viceversa.

List of parameters

17.1 Plant dimensioning and type of regulation.
The XC450CX is pre-set to drive a rack with 3 compressors and 3 fans.
A1 (term. 17-18), oA2 (term. 19-20), oA3 (term. 21-22), oA4 (term. 23-24), oA5 (term. 25-26), relay 1, 2, 3, 4, 5, configuration: by means of these parameters the plant can be dimensioned according to the number and type of compressors and/or fans and the  number of steps for each one.
Each relay according to the configuration of the oA(i), where (i) = 1, 2, 3, 4, 5, parameter can work as:

• Not used: oA(i) = nu
• Compressor circuit1: oA(i) = cPr1,
• Compressor circuit2: oA(i) = cPr2,
• Step: oA(i) i = StP
• Inverter compressor for circuit 1: oA(i) = inC1
• Inverter compressor for circuit 2: oA(i) = inC2
• Fan: oA(i) = FAn
• Fan with inverter/ECI fan: oA(i) = InF
• Injection of cooling liquid: oA(i) = Lin
• Alarm: oA(i) = ALr
• Flood protection function: oA(i) = Liq
• Valve for hot gas injection in case of low superheat: oA(i) = HGi

NOTE: also the “dGS”, “6dG”, “dGst” values are present. These values must not be used.
COMPRESSORS CONFIGURATION
According to the oA1, oA2, oA3, oA4, oA5, oA6 configuration, 2 kinds of plant can be defined:
Rack with compressors only: all the oAi different from FAn
Rack with compressors and fans: both FAn and CPr are used for oAi.
NOTE: CONFIGURATION OF COMPRESSOR WITH UNLOADERS (STEPS): the output of compressor has to be set before the output for unloaders (steps).
ES. Compressor with 1 unloader: oA1 = cPr, oA2= StP.
If compressor with different capacities are used (CtyP=dPo), all the oAi must to be configured as cPr (compressor) otherwise the configuration alarm “CStP” will be activated.
If compressors with different capacities are used (CtyP=dPo), all the oAi must to be configured as cPr (compressor) otherwise the configuration alarm “CStP” will be activated.
If an oAi set as step without any previous oAi set as cPr the configuration alarm “CStP” will be activated.

PLANT CONFIGURATION EXAMPLES:

Plant with 3 compressors 3 fans
default configuration with PP11,
PP30 pressure transducers:
oA1 = CPr1,
oA2 = CPr1,
oA3 = CPr1,
oA4 = FAn,
oA5 = Fan.|
---|---
Plant with 4 compressors without
fans:
oA1 = CPr1,
oA2 = CPr1,
oA3 = CPr1,
oA4 = CPr1,
oA4 = nu|
Plant with 1 frequency compressor
+ 2 standard  compressors and
inverter for fans:
oA1 = InC1,
oA2 = CPr1,
oA3 = CPr1,
oA4 = inF,
oA5 = nu,
AOC = tEn
AOF = InC1
2AOC = tEn
2AOF = inF|
Plant with 4 compressors with
inverter for fans:
oA1 = CPr1,
oA2 = CPr1,
oA3 = CPr1,
oA4 = CPr1,
oA5 = inF
AOC = tEn
AOF = InF
if the inverter requires digital input to
start regulation|
Plant with 1 frequency compressor
+ 2 standard  compressors and 3
fans:
oA1 = InC1,
oA2 = CPr1,
oA3 = CPr1,
oA4 = FAn,
oA5 = FAn,
AOC = tEn
AOF = InC1|

CtyP Compressor type: it sets if compressors have the same power (homogeneous) or not.
SPo = compressors with same capacity
dPo = compressor with different capacities.
Scr = screw compressors.
StP Valve outputs (unloader) polarity: polarity of the outputs for capacity valves. It determines the status of the relays associated with the capacity valves (only for homogeneous and stepped-capacity compressors)
oP=valve activated with open contacts of the relay;
cL= valve activated with close contacts of the relay.
PC1..PC5 Capacity of compressor 1…5: for setting the capacity of single compressors. It’s used only if CtyP=dPo.
Insert in each parameter the capacity of the compressor used.
E.I. 3 compressors with following capacity: 10, 20, 40 HP. The parameters have to be set in this way: PC1=10,
PC2=20, PC3=40.
FtyP: Refrigerant type: set the kind of gas refrigerant used in the plant:

Sty Compressors rotation enabling
YES = rotation enabled : this algorithm distributes the working time between the various compressors to ensure even run times.
no = fixed sequence: the compressors are enabled and disabled in fixed sequence: first, second etc.
NOTE: If a relay is set as inverter is always started as first and switched off as last. In any case, if it is locked because of safety timers, it can be started to maintain the pressure in the regulation band. rot Fan rotation enabling
YES = rotation enabled: this algorithm distributes the working time between the various fans to ensure even run times.
no = fixed sequence: the fans are enabled and disabled in fixed sequence: first, second etc.

17.2 Probes configuration
Probes can be used in different ways according to plant features, as described in the following table:
17.2.1 Suction probe configuration
P1c: Suction probe setting (probe 1):
nP = not used: don’t set it;
Cur = 4 ÷ 20 mA pressure transducer; use term. 4(+), 5 (in); 3 (gnd) if present
tEn = 0.5÷4.5V ratiometric pressure transducer; use term. 7(+), 5 (in); 3 (gnd)
ntc = NTC 10K probe; use term. 5-7
PA04: Adjustment of read out for the Probe 1 (used only if P1c=Cur or tEn). Corresponding to 4mA or 0.5V
input signal, given by the suction probe (-1.0 ÷ PA20bar; -15÷PA20PSI; -100 ÷ PA20KPA)
E.I. PP11 relative pressure transducer, range -0.5÷11.0 bar. PA04=-0.5; PA20=11.0
PP30 relative pressure transducer, range: 0÷30bar. PA04=0.0; PA20=30.0.
PA20: Adjustment of read out for the Probe 1 corresponding to 20mA or 4.5V input signal, given by the suction probe (PA04 ÷ 61.0BAR; PA04 ÷ 885PSI; PA04 ÷ 6100KPA).
CAL: Probe 1 calibration: the range depends on the dEU parameter:
dEU=bar or °C: -12.0÷12.0;
dEU=PSI or °F: -200÷200;
dEU=kPA: -999÷999;
17.2.2 Condenser probe configuration
P2c: Condenser probe setting (probe 2):
nP = not used:
Cur = 4 ÷ 20 mA pressure transducer; use term. 4(+), 6 (in); 3 (gnd) if present
tEn = 0.5÷4.5V ratiometric pressure transducer; use term. 7(+), 6 (in); 3 (gnd)
ntc = NTC 10K probe; use term. 6-7
FA04: Adjustment of read out for the Probe 2 (used only if P2c=Cur or tEn). corresponding to 4mA or 0.5V input signal, given by the delivery probe
(-1.0 ÷ FA20bar; -15÷FA20PSI; -100 ÷ FA20KPA)
FA20: Adjustment of read out for the Probe 2 corresponding to 20mA or 4.5V input signal, given by the condensing probe (FA04 ÷ 61.0BAR; FA04 ÷ 885PSI; FA04 ÷ 6100KPA)
FCAL: Probe 2 calibration the range depends on the dEU parameter:
dEU=bar or °C: -12.0÷12.0;
dEU=PSI or °F: -200÷200;
dEU=kPA: -999÷999;
17.2.3 Probe 4 configuration
P4c: Probe 4 setting (13-14):
nP = not used:
nt10 = NTC 10K
nt86 = NTC 86K
O4: Probe 4 calibration the range depends on the dEU parameter:
dEU= °C: -12.0÷12.0;
dEU= °F: -200÷200;
17.2.4 Probe selection for fan
FPb: Probe selection for condenser fan
nP = not used:
P1 = Probe 1
P2 = Probe 2 – Factory setting
P3 = not set it.

17.3 Configurable digital inputs configuration
iF01 Digital input 1 configuration (8-14)
nu = Not used: the digital input is disabled.
oA1= Safety digital input for load 1, term. 17-18; (Factory setting);
oA2 = Safety digital input for load 2, term. 19-20
oA3 = Safety digital input for load 3, term. 21-22
oA4 = Safety digital input for load 4, term. 23-24
oA5 = Safety digital input for load 5, term. 25-26
oA6 = not used it
inF = Safety digital input of inverter for fan, used when none relay is configured as inverter for fans
LP1 = low pressure switch, circuit1
LP2 = not used it
HP = High pressure switch
ES = Energy saving;
oFF = instrument shut down;
LL = liquid level alarm
SIL = to enable the silence function
EAL = generic external alarm warning, it doesn’t affect the regulation
iF02 Digital input 2 configuration (9-14) – For the values see iF01; Factory setting oA2.
iF03 Digital input 3 configuration (10-14) – For the value see iF01; Factory setting oA3
iF04 Digital input 4 configuration (11-14) – For the value see iF01; Factory setting oA4
iF05 Digital input 5 configuration (12-14) – For the value see iF01; Factory setting oA5
iF07 Digital input 6 configuration (13-14) ) – For the value see iF01; Factory setting ES
NB: Digital input 7 is enabled only when P4C=NP, otherwise it operates as temperature probe
iP01 Digital input 1 polarity (8-14):
oP: the digital input is activated by opening the contact;
CL: the digital input is activated by closing the contact.
iP02 Digital input 2 polarity (9-14):
oP: the digital input is activated by opening the contact;
CL: the digital input is activated by closing the contact.
iP03 Digital input 3 polarity (10-14):
oP: the digital input is activated by opening the contact;
CL: the digital input is activated by closing the contact.
iP04 Digital input 4 polarity (11-14):
oP: the digital input is activated by opening the contact;
CL: the digital input is activated by closing the contact.
iP05 Digital input 5 polarity (12-14):
oP: the digital input is activated by opening the contact;
CL: the digital input is activated by closing the contact.
iP07 Digital input 6 polarity (13-14):
oP: the digital input is activated by opening the contact;
CL: the digital input is activated by closing the contact.
NB: THE ABOVE FUNCTIONALITIES ARE ENABLED ONLY WHEN P4C=NP. With
P4C = ntc or nt86 or ntcH this input is operating as a NTC 10K or NTC 86K or NTC 10K extended range (150°C) temperature sensor
d1d Digital input set as oA1 or Co1 activation delay (0÷255s), This delay it is considered when i1F or i2F or i3F or i4F or i5F or i6F or i7F or i8F is set as oA1 or Co1
d2d Digital input set as oA2 or Co2 activation delay (0÷255s), This delay it is considered when i1F or i2F or i3F or i4F or i5F or i6F or i7F or i8F is set as oA2 or Co2
d3d Digital input set as oA3 or Co3 activation delay (0÷255s), This delay it is considered when i1F or i2F or i3F or i4F or i5F or i6F or i7F or i8F is set as oA3 or Co3
d4d Digital input set as oA4 or Co4 activation delay (0÷255s), This delay it is considered when i1F or i2F or i3F or i4F or i5F or i6F or i7F or i8F is set as oA4 or Co4
d5d Digital input set as oA5 or Co6 activation delay (0÷255s), This delay it is considered when i1F or i2F or i3F or i4F or i5F or i6F or i7F or i8F is set as oA5 or Co6
did  Liquid level alarm, signaling delay: (enabled only if one digital input is set as LL) 0÷255min
didA External alarm, signaling delay: (enabled only if one digital input is set as EAL) 0÷255min
ALMr Manual reset of alarms for compressors and fans.
no = automatic recover of alarm: regulation restart when the correspondent digital input is disabled; yES = manual recover for the alarms of compressors and fans See also par.23.1.2

17.4 Display and Measurement unit
The measurement unit of the parameters referred to temperature or pressure depends on the parameters dEU, CF and PMu.
NOTE: The controller automatically converts values of set points and parameters referred to the pressure/temperature when the dEU parameter is changed. In any case check the value of the parameters referred to temperature and pressure after changing dEU.
dEU: Selection of the kind of measurement unit: pressure or temperature
dEU = tMP: the parameters referred to pressure/temperature will be expressed in temperature according to the value of the CF parameter (°C or °F)
dEU = PrS: the parameters referred to pressure/temperature will be expressed in pressure according to the value of the PMU parameter (bar, PSI or KPA)
CF Measurement unit for temperature: it is used only with dEU = tMP, and it set the measurement unit for parameters referred to temperature/pressure.
°C = Celsius degree
°F = Fahrenheit degree
PMU Measurement unit for pressure: it is used only with dEU = PrS, and it set the measurement unit for parameters referred to temperature/pressure.
bar = bar
PSI = PSI
PA = kPA
rES Resolution for °C and bar (in = integer; dE= decimal point)
dEU1 Default visualization for upper display: PrS= Pressure; tPr= temperature dSP2 Probe selection for lower display: nu = display switched off – P1 = Probe 1 – P2 = Probe 2 – P4 = Probe 4
– StC1 = Compressor Set Point – StC2 = Compressor set point for section 2 – SetF = Fan set point dEU2 Default visualization for lower display: tPr= temperature, PrS= Pressure;

17.5 Compressor regulation
Pbd Proportional band or neutral zone width (0.1÷5.0bar/0.5÷30°C or 1÷150PSI/1÷50°F) The band (or zone) is symmetrical compared to the target set point, with extremes: set-Pbd/2 ÷ set+Pbd/2. It is used as proportional band for PI algorithm.
The measurement unit depends on the dEU, CF, PMU par.
rS Proportional band offset: PI band offset. It permits to move the proportional band of the PI. With rS=0 the band is between Set-Pbd/2 ÷ Set+Pbd/2;
inC Integration time: (0 ÷ 999s) PI integration time
ton Inverter at maximum capacity before starting a new load (0÷255s)
toF Inverter at minimum capacity before stopping a load (0÷255s)
ESC Energy saving value for compressors: (-20÷20bar; -50÷50°C) this value is add to the compressor set point.
onon: Minimum time between 2 following switching ON of the same compressor (0÷255 min).
oFon: Minimum time between the switching off of a compressor and the following switching on. (0÷255min).
Note: usually onon is greater than oFon.
don: Time delay between the insertion of two different compressors (0÷99.5min; res. 10s).
doF: Time delay between switching off of two different compressors (0÷99.5 min; res. 10s)
donF: Minimum time a stage stays switched ON (0÷99.5 min; res. 10s)
Maon Maximum time for compressor ON (0 ÷ 24 h; with 0 this function is disabled.) If a compressor keeps staying on for the MAon time, it’s switched off and it can restart after the oFon standard time.
FdLy: “don” delay enabled also for the first call. If enabled, the triggering of the step is delayed for a “don” value, respect to the call. (no = “don” not enabled; yES=”don” enabled)
FdLF “doF” delay enabled also for the first switching off. It enables the “doF” delay between the request of a release and the actual switching off. (no = “doF” not enabled; yES=”doF” enabled)
odo: Regulation delay on start-up: (0÷255s) on switching ON the instrument starts working after the time delay imposed in this parameter.
LSE: Minimum set point: The measurement unit depends on dEU parameter. It sets the minimum value that can be used for the set point, to prevent the end user from setting incorrect values.
HSE: Maximum set point: The measurement unit depends on dEU parameter. It sets the maximum acceptable value for set point.

17.6 Liquid injection thermostat – only screw compressors
Lit: Set point ( °C) for cooling injection thermostat (0 ÷ 150°C) The reference probe is set by LiPr parameter, the thermostat relay is given by the relay set as oAi = Lin.
Lid: Differential for cooling injection thermostat (0.1 ÷ 10.0) The reference probe is set by LiPr parameter
LiPr Probe for cooling injection thermostat:
nP: function disabled
P4: probe P4 (term. 13-14)

17.7 Fans regulation
Pb Proportional band zone width (0.1÷30.0°C; 1÷50°F; 0.1÷10.0bar, 1÷150PSI; 10÷1000KPA).
NOTE: Set the dEU par. and the target set point for fans before setting this parameter.
The band is symmetrical compared to the target set point, with extremes: SETF+Pb/2 ÷ SETF -Pb/2. The measurement unit depends on the dEU par.
ESF Energy saving value for fans: (-20÷20bar; -50÷50°C) this value is add to the fans set point.
PbES Band offset for fan regulation in ES (-50.0÷50.0°C; -90÷90°F; -20.0÷20.0bar; -300÷300PSI; 2000÷2000KPA).
During energy saving Fon Time delay between the insertion of two different fans (0÷255sec).
FoF Time delay between switching off of two different compressors (0÷255 sec)
LSF Minimum set point for fan: The measurement unit depends on dEU parameter. It sets the minimum value that can be used for the set point, to prevent the end user from setting incorrect values.
HSF Maximum set point for fan: The measurement unit depends on dEU parameter. It sets the maximum acceptable value for set point.

17.8 Alarms – compressor section
PAo: Alarm probe exclusion at power on. it is the period starting from instrument switch on, before an alarm probe is signaled. (0÷255 min). During this time if the pressure is out of range all the compressor are switched on.
LAL: Low pressure (temperature) alarm – compressor section: The measurement unit depends on dEU parameter: (PA04 ÷ HAL bar; -50.0÷HAL °C; PA04÷HAL PSI; -58÷HAL °F) It’s independent from the set point. When the value LAL is reached the A03C  alarm is enabled, (possibly after the tAo delay time).
HAL: High pressure (temperature) alarm– compressor section: The measurement unit depends on dEU parameter: (LAL ÷ PA20 bar; LAL÷150.0 °C; LAL÷PA20 PSI; LAL÷302 °F). It’s independent from the set point. When the value HAL is reached the A04C  alarm is enabled, (possibly after the tAo delay time).
tAo: Low and High pressure (temperature) alarms delay– compressor section: (0÷255 min) time interval between the detection of a pressure (temperature) alarm condition and alarm signaling.
ELP Electronic pressure switch threshold: (-50°C÷STC1; -58°F÷STC1; PA04÷STC1); Pressure / Temperature value at which all the compressors are switched off. It has to be set some degrees above themechanical low pressure switch value, in order to prevent  mechanical low pressure activation.
SEr: Service request: (1÷999 hours, res. 10h; 0 = alarm excluded ) number of running hours after that the “A14” maintenance call is generated.
PEn: Low pressure-switch intervention numbers: (0÷15). If the low pressure- switch is enabled PEn times in the PEI interval, the controller is locked. Only the manually unlocking is possible. See also the alarms table at paragraph 23. Every time the pressure- switch is enabled all the compressor are turned off.
PEI: Pressure-switch interventions time (0÷255 min) Interval, linked to the Pen parameter, for counting interventions of the low pressure-switch..
SPr: number of steps engaged with faulty probe. (0÷6).
dtLF Compressors OFF in case of discharge line temperature alarm (n,y)
PoPr Capacity engaged with faulty probe: (0÷100%) it’s used only if CtyP=dPo.

17.9 Alarms – fans section
LAF: Low pressure alarm – fans section: The measurement unit depends on the dEU parameter: (FA04 ÷ HAF bar; -50.0÷HAF °C; FA04÷HAF PSI; -58÷HAF °F) It’s independent from the set point. When the value LAF is reached the LA2 alarm is enabled,  (possibly after the AFd delay time).
HAF: High pressure alarm – fans section: The measurement unit depends on the dEU parameter: (LAF÷FA20 bar; LAF÷150.0 °C; LAF÷FA20 PSI; LAF÷302 °F). It’s independent from the set point. When the value HAF is reached the HA2 alarm is enabled,  (possibly after the AFd delay time).
AFd: Low and High pressure alarms delay – fans section: (0÷255 min) time interval between the detection of a pressure alarm condition in the fans section and alarm signaling.
HFC Compressors off with high pressure (temperature) alarm for fans
no = compressors are not influenced by this alarm
yES = compressors are turned off in case of high pressure (temperature) alarm of fans dHF
Interval between 2 compressors turning off in case of high pressure (temperature) alarm for fans (0 ÷ 255 sec)
PnF: High pressure-switch intervention numbers – fans section: (0÷15 with 0 the manually unlocking is disabled) if the high pressure-switch is enabled PnF times in the PiF interval, the controller is locked. It can be unlocked only manually. See paragraph 23.  Every time the pressure-switch is enabled all the compressors are turned off and all the fans are turned on.
PiF: Pressure-switch interventions time – fans section (0÷255 min) Interval, linked to the PEn parameter, for counting interventions of the high pressure- switch..
FPr Number of fans engaged with faulty probe. (0÷#fans).

17.10 Suction superheat of circuit 1
ASH0 Differential for low superheat pre-alarm. (0.1 to 30.0°C/ 1 to 60°F).
The low superheat pre-alarm warning is sent when the superheat (SH) is lower than ASH2 (low superheat alarm threshold) + ASH0, possibly after the ASH1 delay.
ASH1 Delay for signalling low superheat pre-alarm (0÷255sec)
If the superheat is below the ASH2+ASH0 threshold for ASH1 time the low superheat pre-alarm warning is sent.
ASH2 Low suction superheat alarm threshold (0.1÷15.0°C/ 1÷30°F). With SH < ASH2 the low superheat alarm is sent, possibly after the ASH3 delay
ASH3 Delay for signalling low superheat alarm (0÷255sec)
If the superheat is below the ASH2 threshold for ASH3 time the low superheat alarm message is sent.
ASH4 Switching off compressors with low superheat alarm (No, Yes)
ASH4 = no: compressors keep on working even with low superheat alarm.
ASH4 = yES: compressors are stopped in case of low superheat alarm.
ASH5 Differential to restart regulation after of low superheat alarm with compressor stop (0.1 to 15.0°C/ 1 to 30°F). In case of regulation stop (ASH4= yES), it restarts when SH > ASH2+ASH5
ASH6 Delay to restart regulation after superheat > ASH2+ASH5 (0÷255 min). If the regulation is stopped because of low superheat alarm, it can restart when SH>ASH2+ASH5 for the ASH6 time.
ASH7 Superheat value to enable hot gas injecting valve (0.1 to 15.0°C/ 1 to 30°F)
With a relay set as hot gas injection valve, (oA2 or oA3 or oA4 = HGi), the relay is on with SH < ASH7 –ASH8.
ASH8 Differential for ASH7
(0.1 to 30.0°C/ 1 to 60°F)
ASH9 Probe selection for superheat monitoring (nP, P3, P4)
ASH9 = nP no superheat control
ASH9 = P4 the probe to calculate the superheat (SH) is the probe P4 (term. 13-14). In this case also the parameter P4C must be set as nt10 or nt86.

17.11 Dynamic set point for fan
dSEP Dynamic set point reference probe
nP: no probe; function disabled
P4: probe P4 (term. 13-14)
dSES External temperature value to start dynamic regulation (-50÷150°C; -58÷302 °F)
dSEb External band width for dynamic set point (-50.0 ÷ 50.0°C; -90 ÷ 90°F)
dSEd Set point differential for dynamic set point: (-20.0÷20.0°C; -50.0÷50.0PSI; -300÷300°F)

17.12 Analog output 1 (optional) – Terminals 14-15
AoC Analog output 1 setting
tEn = 0÷10V output
cUr = 4-20mA output
AOF Analog output 1 function
nu = analog output disabled;
Inc1= To drive inverter for suction frequency compressor, suction of circuit 1;
Inc2 = To drive inverter for suction frequency compressor, suction of circuit 2
inF= to drive ECI fan or inverter for fan
FrE = “Free”, proportional to the probe P4.
InCP Inverter compressor always activated at first:
no: other compressors if available are allowed to start when the inverter compressor is locked by safety timers. This allows the system to satisfy the cooling demand when the inverter compressor is unavailable.
yES: the inverter compressor is always started as first. If unavailable due to safety timers the regulation will be locked till timers will be over.
AOP Reference probe for the analog output 1 It is used only if AOP=FrE
nP = not probe
P3 = probe P3
P4 = probe P4
LAO Temperature value associated to minimum value of analog output (AOM) (-50.0÷150.0°C, -58÷302°F).
UAO Temperature value associated to the maximum value of analog output, 10V or 20mA (-50.0÷150.0°C, -58÷302°F).
AOM Minimum value for analog output 1 (4 ÷ 20mA or 0÷10V)
AOt Time of analog output 1 at max after the start (0÷15s)
MPM Maximum % variation per minute of analog output 1: (nu; 1÷100)
nu = not used: function disabled
1÷100 = it sets the maximum percentage variation per minute of the analog output.
SAO Percentage of analog output 1 in case of probe failure: (0 ÷ 100%)
AOH Maximum analog output 1 percentage when silence mode function is enabled (0÷100)

17.13 Analog output 2 (optional) – Terminals 14-16
2AoC Analog output 2 setting
tEn = 0÷10V output
cUr = 4-20mA output
2AOF Analog output 2 function
nu = analog output disabled;
Inc1= To drive inverter for suction frequency compressor, suction of circuit 1;
Inc2 = To drive inverter for suction frequency compressor, suction of circuit 2
inF= to drive ECI fan or inverter for fan
2AOP Reference probe for the analog output 2 It is used only if 2AOP=FrE
nP = not probe
P3 = probe P3
P4 = probe P4
2LAO Temperature value associated to minimum value of analog output (2AOM) (-50.0÷150.0°C, -58÷302°F).
2UAO Temperature value associated to the maximum value of analog output, 10V or 20mA (-50.0÷150.0°C, -58÷302°F).
2AOM Minimum value for analog output 2 (4 ÷ 20mA or 0÷10V)
2AOt Time of analog output 2 at max after the start (0÷15s)
2MPM Maximum % variation per minute for analog output 2: (nu; 1÷100)
nu = not used: function disabled
1÷100 = it sets the maximum percentage variation per minute of the analog output.
2SAO Percentage of analog output 2 in case of probe failure: (0 ÷ 100%)
2AOH Maximum analog output 2 percentage when silence mode function is enabled (0÷100)

17.14 Other
tbA Alarm relay silencing: by pushing one of the keypad buttons. no= alarm relay stays on; yES= alarm relay is switched off by pushing any keys.
OAP Alarm relay output polarity: cL=closed when activated; oP= opened when activated
oFF Switching ON/OFF enabling from keyboard: (no = disabled; yES= enabled) It permits the switching
ON/OFF of the instrument by pressing the SET key for more than 4s.
bUr Buzzer enabling
no = the buzzer is not used in case of alarm
yES = buzzer is used in case of alarm
Adr: Serial address (1 –247) It is used in monitoring system.
rEL Software release for internal use.
SrL Sub-Release firmware for internal use
Ptb Parameter table code: readable only.
Pr2 Access to Pr2 parameter level

Even Capacity Compressors (CtyP = Spo)

18.1 Compressors With Same Capacity – Dead band control
This regulation is applied both to the circuit 1 and the circuit 2.
The neutral zone (Pbd) is symmetrical compared to the target set point, with extremes: set+Pbd/2 … set-Pbd/2. If the pressure (temperature) is inside this zone the controller maintains the same number of loads switched on and off, without changing anything.
When the pressure (temperature) go out from the zone, regulation starts. If the pressure is greater than SET+Pbd/2, the loads are switching on with timing given by parameters: don and doF.
A load is turned on only if his safety times onon, oFon, donF are over.
Regulation stops when the pressure (temperature) comes back into the neutral zone.
In the following a simplify example that explains the regulation in neutral zone for compressor homogeneous with 1 step for each compressors. The safety times onon, oFon and donF are not considered. In the real regulation any load is entered or turned off only if these times are over.
Ex. Dead band control, compressors with same capacities, 1 step for each compressor.
In this example:
oA1 = cPr1; oA2 = cPr1; oA3 = cPr1; oA4 =nu; oA5 = nu number of compressors
CtyP = SPo homogeneous compressors;
Sty = yES rotation
FdLy = no “don” delay not enabled at first calling after an equilibrium condition.
dLF = no “doF” delay not enabled at first calling after an equilibrium condition.

UNEVEN CAPACITY COMPRESSORS (CtyP = dPO)

With CtyP = dPO the regulation is performed for uneven capacity compressors
In this case the capacity supplied by the system is a combination of the capacity of different compressors.
The capacity of each compressor ha sto be set in the parameters PC1…PC5.
The regulation algorithm supply a combination of the available capacities, starting from the lower ones and increasing step by step according to the requests coming from the system.
With uneven capacity compressors, the algorithm doesn’t distribute the working time between the various compressors to ensure even run times.

19.1.1 Regulation example
oA1 = CPr1, oA2 = CPr1, oA3 = CPr1, OA4 = CPr1, oA5 = nu,
CtyP = dPo
Pc1 = 10; Pc2 = 15 Pc3 = 30; Pc4 = 40

STEP| Pct = 10;| Pc2 = 15| Pc3 = 30;| Pc4 = 40| SYSTEM CAPACITY
---|---|---|---|---|---
1| ON| –| –| –| 10
2| –| ON| –| –| 15
3| ON| ON| –| –| 25
4| –| –| ON| –| 30
5| –| –| –| ON| 40
6| –| ON| ON| –| 45
7| ON| –| –| ON| 50
8| –| ON| –| ON| 55
9| ON| ON| –| ON| 65
10| –| –| ON| ON| 70
11| ON| –| ON| ON| 80
12| | ON| ON| ON| 85
13| ON| ON| ON| ON| 95

The transition between the various steps can be carried out only if the safety timers (onon, oFon, donF) have been expired, otherwise the first available step is used.

SCREW COMPRESSORS (CtyP = Scr)

READ CAREFULLY BEFORE PROCEEDING
The controller doesn’t manage any time limitation on the activation of the 25% capacity valve.
If the compressor is not design for a long activation of the 25% capacity valve, an external device able to exclude this situation MUST be used. !!!!!
Dixell can’t be considered responsible for possible damages caused from this situation
The controller is able to manage only 1 screw compressor, operating on circuit

1. Loads activation is managed by the neutral zone.
   To set it:
   CtyP = Scr: in this way the compressor is managed as screw compressor, and the relays set as steps, will follow special activation rules, as explained in the following chapters.
   The activation of the valve is designed according to the Bitzer, Hanbell compressors.
   Set the relay oA1 = CPr1, it will manage the compressor.

20.1 Regulation with screw compressors like Bitzer/ Hanbell/ Refcomp etc
Screw compressors like Bitzer use up to 3 valves for the power regulation.
20.1.1 Relay activation
ES. Compressor with 4 steps:
oA1 = CPr1; oA2 = StP; oA3 = StP; oA4 = StP; CtyP = Scr
a. Activation with valves ON due to voltage presence (StP=cL).

| oA1 = Screwl| oA2 = StP| oA3 = StP| oA4 = StP
---|---|---|---|---
Step 1 (25%)| ON| ON| OFF| OFF
Step 2 (50%)| ON| OFF| ON| OFF
Step 3 (75%)| ON| OFF| OFF| ON
Step 4 (100%)| ON| OFF| OFF| OFF

b. Activation with valves ON due to voltage absence (StP=oP).

| C1 = Screwl| C2 = stp| C3 = stp| C4 = stp
---|---|---|---|---
Step 1 (25%)| ON| OFF| ON| ON
Step 2 (50%)| ON| ON| OFF| ON
Step 3 (75%)| ON| ON| ON| OFF
Step 4 (100%)| ON| ON| ON| ON

Fan regulation

The fan regulation band Pb is divided by the number of fans:
The numbers of fans switched ON is proportional to the value of the input signal: when this distances itself from the target set point and enters the various bands, the fans are switched ON, to be then turned OFF when the signal brings near the set point.
In this way if the pressure is greater than regulation band, all the fans are on, if the pressure (temperature) is lower than the regulation band all the fans are off.
Naturally also for this regulations all the delays (Fon and FoF) are valid.
Regulation according to the running hours
The algorithm switch on and off the loads according to the running hours of each load. In this way the running hours are balanced.
Example 4 Fans: oA2 =FAn; oA3 = FAn; oA4 = FAn; rot = yES rotation enabled

21.1 Condenser with Inverter or Eci Fans–Analog Output Setting
This configuration is used when all fans of the condensing group are ECI fans or driven by one inverter or a chopped phase driver.
The capacity used by the inverter is proportional to the delivery pressure value inside the regulation band (SETF-Pb/2÷ SETF+Pb/2.

21.1.1 Condenser fan configurations and Parameters

of the inverter.
AoC = tEn| Analog output setting| Set the output as 0-10V
AoF = InF| Analog output function| Set the output to drive ECI or inverter fan
AOM =0| Minimum value for analog output| The minimum voltage is OV.
NOTE: verify on the inverter of EC I fan of chopped phase driver that with this input a proper output is supplied to the fan.
AOt = 5| Time of analog output at max after the start| To start the fan the controller supplies 10V output for 5s, then starts standard regulation
MPM = 100| Maximum % variation per minute| The analog output takes 1 min to move from the min to the maximum

21.1.2 How to set it
Parameters involved: oA(i) = inF; AoC = tEn, AoF = InF, Aot = 0, AOM = 30, MPM = 100

a. If required, set a relay to drive the invert (is used to signal to the inverter to start and stop the regulation), by setting: oA(i) = inF inverter for fans
b. Set the kind of signal of the analog output current (4-20ma) or voltage (0-10V) by the Analog output setting parameter “AoC”: tEn = 0÷10V output; cUr = 4-20mA output
c. Set the function of the analog output: AoF = InF
d. Set the time of the analog output at max after start up EI: Aot = 3s
e. Set the max % variation per min (MP)
f. At last set also the percentage of analog output in case of probe failure: (0 ÷ 100%)SAO

21.2 Analog output “free”
This setting is used to link the analog output 1 to a temperature probe. The analog output will take values proportional to the temperatures detected by the probe P3 or P4, according to the setting.

21.2.1 Analog output “free” configurations and Parameters

superheater
AOP = P4| Reference probe for the analog
output 1 (used only if AOP=FrE)| It’s possible to set only P4 probes.
P4 must be set as temperature probe: P4C = nt10 (NTC 10K) or nt86 (NTC 86K)
LAO = 20| Temperature value associated to minimum value of analog output AOM.| It’s the start scale of the analog output
UAO = 40| Temperature value associated to the maximum value of analog output (10y)| It’s the end scale of the analog output
AOM =0| Minimum value for analog output| The minimum voltage is OV.
NOTE: verify on the inverter of ECI fan of chopped phase driver that with this input a proper output is supplied to the fan.
AOt = 5| Time of analog output at max after the start| With AOt = 5 the controller supplies 10V output for 5s at fan start, then starts standard regulation
MPM = 100| Maximum % variation per minute| The analog output takes 1 min to move from the min to the maximum

21.2.2 How to set it
Parameters involved: AoC = tEn, AoF = FrE, AOP = P4: LAO = 20; UAO = 40; Aot = 0, AOM = 30, MPM = 100

a. Set the kind of signal of the analog output current (4-20ma) or voltage (0-10V) by the Analog output setting parameter “AoC”: tEn = 0÷10V output; cUr = 4-20mA output
b. Set the function of the analog output: AoF = FrE
c. Set the time of the analog output at max after start up EI: Aot = 3s
d. Set the start scale temperature by LAO parameter, at which correspond the AOM value of analog output
e. Set the end scale temperature by UAO parameter, at which correspond the maximum value of analog output
f. Set the max % variation per min (MPM)
g. At last set also the percentage of analog output in case of probe failure: (0 ÷ 100%)SAO

Additional functions

22.1 Compressor running proof function
The digital inputs are normally used to signal a compressor or fan failure
It’s also possible to set the digital inputs for running proof signalling. That means when compressor relay is activated, after a configurable delay the digital input related to the compressor should goes on too (usually a contact from compressor contactor) and the  controller has the “confirmation” that compressor is running.
If it doesn’t, that means something is wrong between the controller and the com pressor itself.

22.1.2 Alarms related

are over
LC01… LCO5| Running proof alarm with manual recover| 5 running proof alarms happened in a hour.| The compressor 1..4 is switched off| Manual by means:
– Controller off-on
– Reset by keyboard
– Reset by monitoring system

22.1.3 Example
EI: Rack with 2 compressors, with compressor safeties and running proof circuit for each compressor:
Compressor 1 on relay 1: oA1 = CPr1
Compressor 2 on relay 2: oA2 = CPr1
Safety for compressor 1 on digital input 1: iF01 = oA1
Safety for compressor 2 on digital input 2: iF02 = oA2
Running proof circuit for compressor 1 on digital input 3: iF03 = Co1
Running proof circuit for compressor 2 on digital input 4: iF04 = Co2
2 seconds delay before signalling alarm and stopping the compressor 1: d1d = 2
2 seconds delay before signalling alarm and stopping the compressor 2: d2d = 2
When the compressor 1 (or 2) starts, if by 2sec the digital input 3 (or 4) is not activated (running proof function) the FC01 alarm is signalled and the compressor is stopped.
Alarm recover as soon as the safety timers of the compressor (onon, ofon) are over and compressor come back available for regulation.
After 5 consecutive alarms, the alarms move from automatic restart to manual restart and it must be reset by Keyboard, of by switching off and on the controller.

22.2 Flood protection function
To ensure the maximum safety of the plant, a relay is activated when the compressors can’t be switched on since they are blocked due to safety times or for other issues or stopped for maintenance.
This output can be used to block the liquid injection to the cabinets to avoid to flood the suction collectors. The relay will be disabled once the compressors can restart (see scheme 1).

To enable this function set one relay by the parameters oA2 or oA3 or oA4 or oA5, as flood protection, EI oA4 = Liq, and then connect it to the external device that blocks the cabinet injection.
NOTE: the relay set as flood protection is automatically activated even when the controller is in stand-by mode.
NOTE
If the compressors are activated in fix sequence, (Sty = no), and the compressor that has to be activated is locked by safety timers, the relay set as flood protection is switched on till the safety timers are over.

22.3 Suction superheat monitoring
Controller can monitor the suction superheat, and signal situations of low superheat, with a pre-alarm and alarm thresholds.
According to the settings, compressors can be stopped in case of low superheat alarm, to preserve compressor integrity.

22.3.1 Suction Superheat detecting

To detect the suction superheat an auxiliary probe among P4 (term. 13-14) has to be set as superheat temperature probe.
To do this set ASH9 = P4.
Controller automatically calculates the suction superheat using the value of the suction probe P1 and the probe set in the parameter ASH9.
The SH is available after 1 minute since at least one compressor is running.

22.3.2 Low superheat signalling and actions
Controller can signal low superheat pre-alarm, only warning, and low superheat alarm, warning and regulation according to parameter ASH4.
The alarm messages and the regulation are described in the following table

when superheat: SH>ASHO+ASH2+1 °C(2°F)
ALSH| Low
superheat allarm| The superheat is less than: SH< ASH2 for ASH3 time| Regulation depends on ASH4: ASH4 = no: regulation not affected. ASH4 = yes: regulation is stopped.| Automatic:
when superheat: SH> ASH5 + ASH2

22.4 Hot gas injection valve
Controller can manage a hot gas injection valve to increase suction superheat. See above figure.
22.4.1 Parameters
A relay must be set as hot gas valve: oA2 or oA3 or oA4 or oA5 = HGi, and
an auxiliary probe among or P4 (term. 13-14) has to be set as superheat temperature probe ASH9 = P4.
Then the following parameters:
ASH7 Superheat value to enable hot gas injecting valve (0.1 to 15.0°C/ 1 to 30°F)
ASH8 Differential for ASH7 (0.1 to 30.0°C/ 1 to 60°F)

22.4.2 Regulation:
The regulation respects the following schema:
Superheat < ASH7 – ASH8 → HGi on
Superheat > ASH7→ HGi off
ASH7 < Superheat < ASH7 – ASH8 → Status.
Dove SH = valore di SH

22.4.3 Special conditions
a. With ASH9 = nP: none probe set as SH probe and one relays set as HGi (valve for hot gas injection) the configuration error is displayed “no Probe For SH”, and the relay set as HGi is never activated..
b. If the probe used to calculate the SH is in error the related probe fault alarm is generated (P4) and the HGi relay is not activated.

Alarm list

Usually alarm conditions are signaled by means of:

1. Activation of alarm output
2. Buzzer activation
3. Message on proper display
4. Log of alarm: code and duration.

The table at paragraph 23.3

23.1 Types of alarms and signaling managed
23.1.1 A12: Configuration alarm
The following configuration parameters are checked after each modification.:
OA1 OA5 Outputs 1- 5 configuration
P2C Second probe configuration.
When these parameters are set in wrong way an alarm message is generated:
the label A12 is shown on the upper display, while the lower display the following messages are shown:

Too Many dGS
output| More than one oAi has been set as dGs (digital scroll)| • Check the oAi parameters and set them different from dGS.
Too Many dGSt
output| One oAi has been set as dGst (triac for digital scroll)| • Check the oAi parameters and set them different from dGSt.
Too Many 6dG
output| More than one oAi has been set as 6dG (triac for digital scroll)| • Check the oAi parameters and set them different from 6dG.
6dG bEForE dGS
ConFig Error| oAi configured as 6dG before the dGS| • Check the oAi parameters and set 6dG after dGS.
dGSt OutPut Error| One oAi has been set as dGst (triac for digital scroll)| • Check the oAi parameters and set them different from dGSt.
dGS not PrESEnt| One oAi has been set as dGs (digital scroll)| •Check the oAi parameters and set them different from dGS.
---|---|---
dGSt not PrESEnt| The digital output for digital compressor has not be set| •Check the oAi parameters and set them different from dGS or 6d0.
StEP ConFiG Error| Load (step) configuration error| •A relay oA(i) has been set as compressor without a previous relay oA(i-1) has been set as compressor. El oA1 = StP
Fan ProbE not
PrESEnt| None probe has been set for to manage the fan| Check parameters FPb , P1C , P2C , and then set a probe for this function
No P3 ProbE For Lin
out| None probe has been set for the Liquid Injection function| Check parameters LiPr , P4C, and then set a probe for this function.
no LoAdS For
rEGuLAtion| None oA(i) is set as compressors or fans| •Check the setting of oA1,oA2, oA3, oA4,oA5, oA5 parameters
ProbE tyPE For
dynAMic Set| A current of voltage transducer has been set for the “Dynamic set point for fan” function| •Set a temperature probe for the ‘Dynamic set point for fan” function, par. “dSEP”
No ProbE For
dynAMic Set| None probe has been set for the “Dynamic set point for fan” function| •Set a temperature probe for the “Dynamic set point for fan” function, par. “dSEP”.
too MAnY InC1| More than one oAi has been set as inC1 (inverter for suction
1)| •Check the oAi parameters and set only 1 as “inC1”.
No AnALoGuE
out For InC1| None analogue output has been set as “inC1”| •Check AoF and 2AoF and set one of them as “inC1”
too MAnY InC2| More than one oAi has been set as inC2 (inverter for suction
2)| •Check the oAi parameters and set only 1 as “inC2”.
No AnALoGuE
out For InC2| None analogue output has been set as “inC2”| •Check AoF and 2AoF and set one of them as “inC2”
too MAnY InF| More than one oAi has been set as inF (inverter for fan)| •Check the oAi parameters and set only 1 as “inF”.
No AnALoGuE
out For InF| None anlogue output has been set as “ME| •Check AoF and 2AoF and set one of them as “ME
CPr Circuit
conFiG Error| The kind of outputs are not compatible with the 2 suction circuits| •Check parameters oA(i) ,CtyP and set CtyP different from Scr.
A01 And A02
SAME Function| AoF and 2AoF have the same setting| •Set AoF and 2AoF properly.
no Probe For SH| One relay is set as hot gas injection valve (oA2 or oA3 or oA4 = HGi), but the probe to detected th superheat is
missed: ASH9 = nP| •Set a probe to detect the superheat by the parameter ASH9 = P4.
•If the hot gas injection valve is not present, set oA2 or oA3 or oA4 different from HGi.

23.1.2 E01L, E02L Electronic Pressure switch alarm, suction 1 and 2 sections Parameters
ELP (2ELP): Electronic pressure switch threshold, section 1 (and 2): (-50°C÷SETC; -58°F÷SETC; PA04÷SETC); Pressure / Temperature value at which all the compressors are switched off. It has to be set some degrees above the mechanical low pressure switch value, in order to prevent mechanical low pressure activation.
Actions
Electronic low pressure: every time the suction temperature/pressure is less than ELP value all the compressors are switched off. The instrument restarts the standard operating mode when pressure/ temperature increases.
23.1.3 E0H1, E0L1, Pressure switch alarm, suction 1, and condensing sections
Parameters
With iF01 or iF02 or iF03 or iF04 or iF05 or iF07 set as LP1 a low pressure switch can be connected to the controller and controller signal Low Pressure switch activation.
With iF01 or iF02 or iF03 or iF04 or iF05 or iF07 set as HP a high pressure switch can be connected to the controller and controller signal High Pressure switch activation.
The polarity is managed by the correspondent parameter iP01, … iP07: digital input polarity: It establishes if the input is activated by closing the contacts (iP0x=cL) or by opening the contacts (iP0x=oP).
Actions
Low pressure: every time the inputs are activated all the compressors are switched off. The instrument restart the standard operating mode when the input is disabled.
If there are PEn activation in the PEi time, only manual resetting is allowed, by pressing the DOWN key for 3s or by turning off and on the instrument.
High pressure: every time the inputs are activated all the compressors are switched off and fans are switched on. The instrument restart the standard operating mode when the input is disabled.
If there are PnF activation in the PiF time, only manual resetting is allowed, by pressing the DOWN key for 3s or by turning off and on the instrument.

23.1.4 EA1÷EA5: Compressors and fans safeties alarm.
Terminals
WARNING: THESE TERMINALS REQUIRE A FREE OF VOLTAGE CONNECTION.
The terminals really used depends on the number of loads. The protections regarding the compressors and fans are connected to these inputs. If one of these protections is enabling (E.I. for lack of oil or overheating, etc,) the corresponding load is turn off.
Parameters
iP01, iP02, iP03, iP04, iP05, iP07: establish if the input is activated by closing (cL) or by opening (=oP) the terminals.
Actions
Every time one input is activated the corresponding output is turned off.
Recovery
Recovery depends on ALMr parameter:
With ALMr = no The instrument restart the standard operating mode when the input is disabled.
With ALMr = yES manual recover for the alarms of compressors and fans. Push the DOWN key for 3s.

23.1.5 P1, P2;P4: probe failure alarm
It is generated by failure in the probe P1, P2 , P3 or P4.
In case of P1 fault, number of steps engaged depends on the SPr parameter In case of P2 fault, number of fans engaged depends on the FPr parameter
If the P4 probes are used for dynamic set point
The function is disabled and only the standard set point is used.

Recovery
Automatic as soon as probe restarts working.
23.1.6 C1HA, C1LA, F-HA, F-LA High and low pressure (temperature) alarms for compressors or fans
This alarm signals that the pressure (temperature) is out of limits established by parameters LAL and HAL for compressors and LAF –HAF for fans.
The tAo and AFd parameters set the delay between alarm condition and alarm signaling.
Action
The alarm is signaled with standard action. The outputs are unchanged.

23.2 Buzzer muting
Press any buttons to silence the buzzer during an alarm condition.
Hold pressed for more than 3 seconds switch off the alarm relay during an alarm condition

23.3 Alarm conditions – summary table

pressure/temperature increases more than ELP value
E0L1| Low pressure- switch alarm, suction| Low pressure switch input of circuit 1 enabled| All compressors of the circuit 1 are turned off. Fans unchanged.| Automatically (if the number of activation are less than PEn in the PEi time) when the input is disable.
– The compressors restarts working according to the working algorithm.
Manually (if PEn activation happened in the PEi time)
When the input is disable:
a. hold pressed the Restart (DOWN)key for 3s or
b. turn off and on the instrument..
– The compressors restarts working according to the working algorithm.
E0H| High pressure switch alarm| High pressure switch input enabled| – All compressors are  turned off.
– All fans are turned on.| Automatically (if the number of activation are less than PEn in the PEi time) when the input is disable.
– Compressors and fans restart working according to the working algorithm.
Manually (if PEn activation happened in the PEi time)
When the input is disable:
– hold pressed the Restart (DOWN) key for 3s or
– turn off and on the instrument.
Compressors and fans restarts working according to the working algorithm.
---|---|---|---|---
P1| P1 probe failure alarm| Probe failure or out of range| – The compressors are activated according to the SPr or PoPr parameters.| Automatically as soon as the probe restarts working.
P2| P2 probe failure alarm| Probe failure or out of range| – The fans are activated according to the FPr parameters.| Automatically as soon as the probe restarts working.
P4| P4 probe failure alarm| Probe 4 failure or out of range| – The functions related to the fourth probe are disabled.| Automatically as soon as the probe restarts working.
EA1 EA2 EA3 EA4 EA5| Load safeties alarm| Safeties compressor/fan input activation. NOTE: with step compressors 1 input for each compressor has to be used.| – the corresponding load is turned off. (with step compressors all relays referred to the input are disabled).| Recovery depends on ALMr parameter: With ALMr = no The instrument restart the standard operating mode when the input is disabled.
With ALMr = yES manual recover for the alarms of compressors and fans. Push the DOWN key for 3s.
C1- LA| Minimum pressure (temperature) alarm compressors
section| Suction pressure or temperature lower than LAL value| signaling only| Automatically: as soon as the pressure or temperature reaches the (LAL+ differential) value. (differential = 0.3bar or 1°C)
F- LA| Minimum pressure (temperature)

alarm fans section

| Condensing pressure or temperature lower than LAF value| signaling only| Automatically: as soon as the pressure or temperature reaches the (LAF+ differential) value. (differential = 0.3bar or 1°C)

Code

| Description| Cause| Action|

Reset

---|---|---|---|---
C1- HA| Maximum pressure  (temperature) alarm  compressors
section| Suction pressure or temperature higher than HAL value| signaling only| Automatically: as soon as the pressure or temperature reaches the (HAL – differential) value. (differential = 0.3bar or 1°C)
F- HA| Maximum pressure (temperature) alarm fans section| Condensing pressure or temperature higher than HAF value| Depends on the parameter HFC| Automatically: as soon as the pressure or temperature reaches the (HAF – differential) value.
(differential = 0.3bar or 1°C)
A5| Liquid level alarm| Input enabled| signaling only| Automatically as soon as the input is disabled
A12| Configuratio n alarms| See par. 23.1.1| –|
A14| Load
maintenance alarm| A load has worked for the hour set in the SEr parameter| – signaling only| Manually: reset the running hour of the compressor (see par. 13 Running hours of loads)
EA| External alarm| The configurable dig. Input set as EA is activated| signaling only| Automatically as soon as the input is disabled
InF| Inverter fan alarm| The configurable dig. Input set as inF is activated| The analog out set as INF is switched off| Automatically as soon as the input is disabled
FC01

…

FC04

| Running proof alarm with

automatic recover

| The digital input set as Co1.. Co5 has not been activated by d1d, … d5d time| The compressor 1..4 is switched off and the safety timers start| Automatic – when safety timers are over
LC01

…

LC05

| Running proof alarm with manual recover| 5 running proof alarms happened in a hour.| The compressor 1..4 is switched off| Manual by means:
– Controller off-on
– Reset by keyboard
– Reset by monitoring system
PrSH| Low superheat Pre-allarm| The superheat is less than: SH< ASH2 + ASH0 for ASH1 time| Only warning| Automatic: when superheat: SH>ASH0+ASH2+1°C(2°F)
ALSH| Low superheat allarm| The superheat is less than: SH< ASH2 for ASH3 time| Regulation depends on ASH4:  ASH4 = no : regulation not  affected.
ASH4 = yes : regulation is stopped.| Automatic: when superheat: SH> ASH5 + ASH2

Technical features

XC450CX
Housing: Self extinguishing PC/PC+ABS.
Case: Front panel 32×74 mm, depth 73mm
Mounting: panel mounting in a 29×71 mm panel cut-out
Degree of protection: Indoor use, Type 1 enclosure (NEMA – UL 50e); Rear housing: IP20.
Power supply: 12Vac/dc  10%, 24Vac/dc  10%, 50-60Hz.
Overvoltage Category: II.
Rated power: 5VA max.
Rated Impulse Voltage: 4000V.
Display: 4 digits red led and 4 digit orange led.
Software class: A.
Terminal connections: pluggable screw terminal block 2.5 mm2 wiring. Max closing torque 0,5Nm
Data storing: on the non-volatile memory (EEPROM).
Type of action: 1B.
Pollution degree: 2.
Ambient Operating temperature: -10T60 °C.
Shipping and storage temperature: -40T85 °C.
Relative humidity: 20 85% (no condensing).
Measuring range: NTC 10K probe: -40÷110°C.
Resolution: 0,1 °C; 1°F; 0.1bar; 1 PSI.
Accuracy (ambient temp. 25°C): ±0,7 °C ±1 digit.
Inputs: up to 3 NTC probes, or up to 3 4÷20mA or up to 0.5÷4.5Vdc transducer.
Digital inputs: up to 6 free voltage, max cable length 10m.
Relay outputs: 4 relay SPST, Rating according to the UL60730
Resistive 3A, 240VAC 50K cycles
Inductive (G.P.) 3A, 240VAC 30K cycles
Motor Load 240VAC, 1/8 hp (1.9FLA/11.4LRA), 30K cycles
Pilot Duty 180VA, 240VAC 30K cycles
Maximum capacity: 12A Plug-in terminal block, 12A other types.
Analogue output: 2 x 4÷20mA or 0÷10V, , SELV, Limited Energy circuit <15W.
Analogue output accuracy: 3% full scale.
Serial output : TTL standard.
Communication protocol: ModBus – RTU.
Purpose of control: operating control.
Construction of control: incorporated control, intended to be used in Class I or Class II equipment.

Parameters – Default values

Label| Value °C| Value Bar| Menù| Descrizione Parametri| Limiti
---|---|---|---|---|---
StC1| -10.0| 3,3| Pr1| Set point for compressors| LSE÷HSE
SEtF| 35.0| 15,0| Pr1| Set point for fans| LSF÷HSF
OA1| CPr1| CPr1| Pr2| Load 1 configuration| nu – CPr1 – CPr2 – StP – dGS – 6dG – dGSt – InC1 – InC2 – FAn – InF – LIn – ALr – Liq – HGi
OA2| CPr1| CPr1| Pr2| Load 2 configuration| nu – CPr1 – CPr2 – StP – dGS – 6dG – dGSt – InC1 – InC2 – FAn – InF – LIn – ALr – Liq – HGi
OA3| CPr1| CPr1| Pr2| Load 3 configuration| nu – CPr1 – CPr2 – StP – dGS – 6dG – dGSt – InC1 – InC2 – FAn – InF – LIn – ALr – Liq – HGi
OA4| Fan| Fan| Pr2| Load 4 configuration| nu – CPr1 – CPr2 – StP – dGS – 6dG – dGSt – InC1 – InC2 – FAn – InF – LIn – ALr – Liq – HGi
OA5| Fan| Fan| Pr2| Load 5 configuration| nu – CPr1 – CPr2 – StP – dGS – 6dG – dGSt – InC1 – InC2 – FAn – InF – LIn – ALr – Liq – HGi
CtyP| SPo| SPo| Pr2| Compressor type| SPo, dPo, Scr
StP| oP| oP| Pr2| Valve output polarity| OP – CL
PC1| 20| 20| Pr2| Capacity of compressor 1| 0÷100
Label| Value °C| Value Bar| Menù| Descrizione Parametri| Limiti
---|---|---|---|---|---
PC2| 20| 20| Pr2| Capacity of compressor 2| 0÷100
PC3| 20| 20| Pr2| Capacity of compressor 3| 0÷100
PC4| 20| 20| Pr2| Capacity of compressor 4| 0÷100
PC5| 20| 20| Pr2| Capacity of compressor 5| 0÷100
FtyP| 404| 404| Pr2| Refrigerant gas type| r22= R22; r134=134, r404=R404A; – 407A = r407A; 407C= r22= r22; r32 = r32; r134=r134, r290 = r290; r404=R404A; 407A = r407A; 407C= r407C; 407F= r407F; 410= r410; r448 = r448A; r449 = r449A, r450 = r450A; r452 = r452A; 507=R507; r513=R513; 14EE= r1234ze; CO2= CO2; 515b () = r515b; 454A ()= R454A; 454b ()= R454B; 454C ()= R454B; 455A ()= R455A; 14YF ()= R1234ze
(*) Present only in 3.5h or following release
Sty| yES| yES| Pr2| Compressor Sequence type| no – yES
Rot| yES| yES| Pr2| Fan Sequence type| no – yES
P1C| Cur| Cur| Pr2| P1 probe setting (4/20mA, 0-5V, ntc)| nP – Cur – tEn – ntc
PA04| -0.5| -0.5| Pr2| 4mA or 0.5V readout for P1 probe| (-1.0 ÷ PA20)BAR; (-15 ÷ PA20)PSI; (-100 ÷ PA20)KPA
PA20| 11.0| 11.0| Pr2| 20mA or 4.5V readout for P1 probe| (PA04 ÷ 61.0)BAR; (PA04 ÷ 885)PSI; (PA04 ÷ 6100)KPA
CAL| 0.0| 0.0| Pr2| P1 probe offset| -12.0÷12.0(°C); -20÷20 (°F); 12.0÷12.0 (bar); – 200÷200 (PSI) -999÷999 (kPA)
P2C| Cur| Cur| Pr2| P2 probe setting (4/20mA, 0-5V, ntc)| nP – Cur – tEn – ntc
FA04| 0.0| 0.0| Pr2| 4mA or 0.5V readout for P2 probe| (-1.0 ÷ FA20)BAR; (-15 ÷ FA20)PSI; (-100 ÷ FA20)KPA
FA20| 30.0| 30.0| Pr2| 20mA or 4.5V readout for P2 probe| (FA04 ÷ 61.0)BAR; (FA04 ÷ 885)PSI; (FA04 ÷ 6100)KPA
FCAL| 0.0| 0.0| Pr2| P2 probe offset| -12.0÷12.0(°C); -20÷20 (°F); 12.0÷12.0 (bar);- 200÷200 (PSI) -999÷999 (kPA)
P4C| nP| nP| Pr2| P4 probe setting (NTC 10K, NTC 86K)| nP – nt10 – nt86
O4| 0.0| 0.0| Pr2| P4 probe offset| -12.0÷12.0(°C); -20÷20 (°F)
FPb| P2| P2| Pr2| Probe setting for fan| nP – P1 – P2 – P4
iF01| oA1| oA1| Pr2| Configurable digital input 1 function (terminals 8-14)| nu – OA1- OA2 – OA3 – OA4 – OA5 – InF – LP1 – LP2 – HP – ES – OFF – LL – SIL – EAL – Co1 – Co2 – Co3 – Co4 – Co5
iF02| oA2| oA2| Pr2| Configurable digital input 2 function (terminals 9-14)| nu – OA1- OA2 – OA3 – OA4 – OA5 – InF – LP1 – LP2 – HP – ES – OFF – LL – SIL – EAL – Co1 – Co2 – Co3 – Co4 – Co5
iF03| oA3| oA3| Pr2| Configurable digital input 3 function (terminals – 10-14)| nu – OA1- OA2 – OA3 – OA4 – OA5 – InF – LP1 – LP2 – HP – ES – OFF – LL – SIL – EAL – Co1 – Co2 – Co3 – Co4 – Co5

iF04

| ****

oA4

| ****

oA4

| ****

Pr2

| Configurable digital input 4 function (terminals 11-14)| nu – OA1- OA2 – OA3 – OA4 – OA5 – InF – LP1 – LP2 – HP – ES – OFF – LL – SIL – EAL – Co1 – Co2 – Co3 – Co4 – Co5
iF05| oA5| oA5| Pr2| Configurable digital input 5 function (terminals 12-14)| nu – OA1- OA2 – OA3 – OA4 – OA5 – InF – LP1 – LP2 – HP – ES – OFF – LL – SIL – EAL – Co1 –

Co2 – Co3 – Co4 – Co5

iF07| ES| ES| Pr2| Configurable digital input 7 function (terminals 13-14)| nu – OA1- OA2 – OA3 – OA4 – OA5 – InF – LP1 – LP2 – HP – ES – OFF – LL – SIL – EAL – Co1 –

Co2 – Co3 – Co4 – Co5

iP01| cL| cL| Pr2| Safety input for Load 1 polarity (8-14):| OP – CL
iP02| cL| cL| Pr2| Safety input for Load 2 polarity (9-14):| OP – CL
iP03| cL| cL| Pr2| Safety input for Load 3 polarity (10-14):| OP – CL
iP04| cL| cL| Pr2| Safety input for Load 4 polarity (11-14):| OP – CL
iP05| cL| cL| Pr2| Safety input for Load 5 polarity (12-14):| OP – CL
iP07| cL| cL| Pr2| Configurable digital input iF07 polarity (13-14):| OP – CL
d1d| 0| 0| Pr2| Dig. input set as oA1 or Co1 activation delay| 0 ÷ 255 (sec)
d2d| 0| 0| Pr2| Dig. input set as oA2 or Co2 activation delay| 0 ÷ 255 (sec)
d3d| 0| 0| Pr2| Dig. input set as oA3 or Co3 activation delay| 0 ÷ 255 (sec)
d4d| 0| 0| Pr2| Dig. input set as oA4 or Co4 activation delay| 0 ÷ 255 (sec)
d5d| 0| 0| Pr2| Dig. input set as oA6 or Co6 activation delay| 0 ÷ 255 (sec)
Label| Value °C| Value Bar| Menù| Descrizione Parametri| Limiti
---|---|---|---|---|---
did| 20| 20| Pr2| Liquid level alarm, signaling delay| 0 ÷ 255 (min.)
didA| 20| 20| Pr2| External alarm, signaling delay:| 0 ÷ 255 (min.)
ALMr| No| No| Pr2| Manual reset for compressor/fan alarms| no – yES
dEU| tPr| Prs| Pr2| Displaying measurement unit: pressure or temperature| tMP – PrS
CF| °C| °C| Pr2| Measurement unit for temperature| °C – °F
PMU| Bar| Bar| Pr2| Measurement unit for pressure| BAr – PSI – PA
rES| dE| dE| Pr2| Resolution for display and parameters| in – dE
dEU1| tPr| Prs| Pr2| Upper display: pressure or temperature selection| tMP – PrS
dSP2| P2| P2| Pr2| Lower display default visualization| nu – P1 – P2 – P3 – P4 – StC1 – StC2 – SEtF
dEU2| tPr| Bar| Pr2| Lower display: pressure or temperature selection| tMP – PrS
Pbd| 5.0| 0,8| Pr2| Proportional band for compressors regulation, suction 1| 0.1÷30.0(°C); 1÷50 (°F); 0.1÷10.0(BAR);

1÷150(PSI) 10÷1000(KPA)

rS

| ****

0.0

| ****

0.0

| ****

Pr2

| Band offset, suction 1| -12.0÷12.0(°C) -20÷20(°F)
-12.0÷12.0(BAR); -200÷ 200(PSI)
-999÷999(KPA)
inC| 500| 500| Pr2| Integral time, suction 1| 0 ÷ 999 sec
ton| 60| 60| Pr2| Time with Inverter at maximum capacity before starting a new load| 0÷255s
toF| 5| 30| Pr2| Time with Inverter at minimum capacity before

starting a new load

| 0÷255s

ESC

| ****

0.0

| ****

0.0

| ****

Pr1

| Energy saving for compressors regulation| -50.0÷50.0(°C) -90÷90(°F)
-20.0÷20.0(BAR) -300÷300(PSI)
-2000÷2000(KPA)
OnOn| 5| 5| Pr2| Minimum delay between 2 switching on of the same compressor| 0 ÷ 255 (min.)
OFOn| 2| 1| Pr2| Delay between the switching off and on of the same compressor| 0 ÷ 255 (min.)
don| 01:00| 01:00| Pr2| Time delay between the insertion of two different loads| 0 ÷ 99.5 (min.10sec)
doF| 00:10| 00:30| Pr2| Time delay between switching off of two different compressors| 0 ÷ 99.5 (min.10sec)
donF| 00:30| 01:00| Pr2| Minimum time a stage stays ON| 0 ÷ 99.5 (min.10sec)
MAon| 0| 0| Pr2| Maximum time a stage stays switched ON| 0 ÷ 24 (hour)
FdLy| No| No| Pr2| ‘don’ delay enabled also for the first request| no – yES
FdLF| No| No| Pr2| ‘doF’ delay enabled also for the first switching off| no – yES
odo| 20| 20| Pr2| Regulation delay at power on| 0 ÷ 255 (sec.)
LSE| -40.0| 0,3| Pr2| Minimum set point (compressors)| -50.0÷HSE(°C) -58.0÷HSE(°F) PA04÷HSE(BAR,PSI,KPA)
HSE| 10.0| 7,2| Pr2| Maximum set point (compressors)| LSE÷150.0(°C) LSE÷302(°F) LSE÷PA20(BAR , PSI , KPA)
Lit| 90.0| 90,0| Pr2| Set point for liquid injection| 0.0 ÷ 180.0°(°C) 32 ÷ 356(°F)
Lid| 10.0| 10,0| Pr2| Differential for liquid injection| 0.1 ÷ 25.5° (°C) 1 ÷ 50° (°F)
LiPr| nP| nP| Pr2| Probe selection for liquid injection| nP – P4
Pb| 5.0| 2,8| Pr2| Proportional band for fan regulation| 0.1÷30.0(°C) 1÷50 (°F) 0.1÷10.0(BAR)
1÷150(PSI) 10÷1000(KPA)
ESF| 0.0| 0.0| Pr2| Energy saving differential for fan regulation| -50.0÷50.0(°C) -90÷90(°F)
-20.0÷20.0(BAR) -300÷300(PSI)
-2000÷2000(KPA)
PbES| 0.0| 0.0| Pr2| Band offset for fan regulation in ES| -50.0÷50.0(°C) -90÷90(°F)
-20.0÷20.0(BAR) -300÷300(PSI)
-2000÷2000(KPA)
Fon| 30| 30| Pr2| Time delay between the insertion of two different fan| 0 ÷ 255 (sec)
FoF| 15| 15| Pr2| Time delay between switching off of two

different fan

| 0 ÷ 255 (sec)
LSF| 10.0| 7,2| Pr2| Minimum set point (fan)| -50.0÷HSF(°C) -58.0÷HSF(°F) FA04(FPb)÷HSF(BAR , PSI , KPA)
HSF| 50.0| 22,0| Pr2| Maximum set point (fan)| LSF÷150.0(°C) LSF÷302(°F) LSF÷FA20 (BAR , PSI , KPA)
PAO| 30| 30| Pr2| Alarm probe delay at power on| 0 ÷ 255 (min.)
Label| Value °C| Value Bar| Menù| Descrizione Parametri| Limiti
---|---|---|---|---|---
LAL| -40.0| 0,3| Pr1| Pressure alarm set low limit (compressors)| -50.0÷HAL(°C); -58÷HAL(°F); PA04÷HAL(BAR , PSI , KPA)
HAL| 10.0| 7,2| Pr1| Pressure alarm set high limit (compressors)| LAL÷150.0(°C); LAL÷302(°F); LAL÷PA20(BAR , PSI , KPA)
tAo| 15| 15| Pr1| Pressure/temperature alarm delay (compressors)| 0 ÷ 255 (min.)
ELP| -45.0| 0,0| Pr2| Electronic pressure switch threshold| -50.0÷STC1(°C) -58÷STC1(°F) PA04÷STC1(BAR , PSI , KPA)
Ser| 999| 999| Pr2| Working hour alarm set (tenth of ours)| 1 ÷ 999 (0= disabled) (10 hour)
Pen| 5| 5| Pr2| Low Pressure switch maximum activations| 0 ÷ 15
PEI| 60| 60| Pr2| Low Pressure switch activations time| 0 ÷ 255 (min.)
SPr| 1| 1| Pr2| Number of compressors ON with faulty probe| 0 ÷ 6
dtLF| YES| YES| Pr1| Stop compressor in case of dtL alarm| no – yES
PoPr| 50| 50| Pr2| Capacity engaged with suction 1 probe failure| 0÷100
LAF| 0.0| 0,5| Pr1| Low pressure alarm set (fan)| -50.0÷HAF(°C); -58÷HAF(°F); FA04÷HAF(BAR , PSI , KPA)
HAF| 60.0| 27,6| Pr1| High pressure alarm set (fan)| LAF÷150.0(°C) LAF÷302(°F) LAF÷FA20(BAR , PSI , KPA)
AFd| 5| 5| Pr2| Pressure alarm delay| 0 ÷ 255 (min)
HFc| YES| YES| Pr2| Compressor off with high pressure (temperature) alarm| no – yES
dHF| 5| 5| Pr2| Interval between 2 compressors turning off with

high pressure (temperature) alarm

| 0 ÷ 255 (sec.)
PnF| 5| 5| Pr2| Fan pressure switch maximum activations| 0 ÷15
PiF| 60| 60| Pr2| Fan pressure switch activations time| 0 ÷ 255 (min)
FPr| 1| 1| Pr2| Fan ON with faulty probe| 0 ÷ 6
ASH0| 5| 5| Pr2| Differential for low superheat pre-alarm| 0.1 to 30.0°C/ 1 to 60°F
ASH1| 240| 240| Pr2| Delay for signalling low superheat pre-alarm| 0÷255 sec
ASH2| 5| 5| Pr2| Low suction superheat alarm threshold| 0.1÷15.0°C/ 1÷30°F
ASH3| 120| 120| Pr2| Delay for signalling low superheat alarm| 0÷255 sec
ASH4| No| No| Pr2| Switching off compressors with low superheat alarm| No, Yes
ASH5| 5| 5| Pr2| Differential to restart regulation after of low superheat alarm with compressor stop| 0.1÷15.0°C/ 1÷30°F

ASH6

| 1| 1| Pr2| Delay to restart regulation after superheat > ASH2+ASH5| ****

0÷255 min

ASH7| 10| 10| Pr2| Superheat value to enable hot gas injecting valve| 0.1÷30.0°C/ 1÷60°F
ASH8| 2| 2| Pr2| Differential for ASH7| 0.1÷15.0°C/ 1÷30°F
ASH9| nP| nP| Pr2| Probe selection for superheat monitoring| nP(0) – P3(1) – P4(2)
dSEP| nP| nP| Pr2| Dynamic Set point function enabled| nP – P4
dSES| 35.0| 35.0| Pr2| External temperature set for DYNAMIC SET POINT function| -50.0 ÷ 150.0 (°C) -58 ÷ 302 (°F)
dSEb| 10.0| -20,0| Pr2| Proportional band DYNAMIC SET POINT| -50.0 ÷ 50.0(°C) -90 ÷ 90 (°F)
dSEd| 0.0| 4,0| Pr2| Differential for DYNAMIC SET POINT| -50.0÷50.0(°C) -90÷90(°F)

-20.0÷20.0(BAR) -300÷300(PSI)

-2000÷2000(KPA)

AOC| Cur| Cur| Pr2| Analogue output 1 working mode| Cur – tEn
AOF| nu| nu| Pr2| Analog output 1 function| nu – InC1 – InC2 – InF
InCP| no| no| Pr2| Frequency compressor always starts at first| no – yES
AOP| nP| nP| Pr2| Reference probe for the analog output 1| nP(0) – P3(1) – P4(2)
LAO| ****

0.0

| ****

0.0

| ****

Pr2

| Temperature value associated to minimum value of analog output (AOM)| ****

-50.0÷150.0(°C)     -58÷302(°F)

UAO| 100.0| 100.0| Pr2| Temperature value associated to the maximum value of analog output, 10V or 20mA| -50.0÷150.0(°C)     -58÷302(°F)
AOM| 0| 0| Pr2| Minimum value of analogue output 1| 0 ÷ 100 (%)
AOt| 0| 0| Pr2| Time with analog output 1 at max when after exceeding AOM| 0÷15s
MPM| 100| 100| Pr2| Maximum % variation per minute, analog output 1| nu, 1 ÷ 100%
SAO| 80| 50| Pr2| Percentage of analog output 1 in case of probe failure| 0 ÷ 100 (%)
AOH| 70| 70| Pr2| Maximum analog output 1 percentage when

silence mode function is enabled

| 0 ÷ 100 (%)
Label| Value °C| Value Bar| Menù| Descrizione Parametri| Limiti
---|---|---|---|---|---
2AOC| Cur| Cur| Pr2| Analogue output 2 working mode| Cur – tEn
2AOF| Nu| Nu| Pr2| Analog output 2 function| nu – InC1 – InC2 – InF
2AOP| nP| nP| Pr2| Reference probe for the analog output 2| nP(0) – P3(1) – P4(2)
2LAO| ****

0.0

| ****

0.0

| ****

Pr2

| Temperature value associated to minimum value of analogue output (2AOM)|

-50.0÷150.0(°C)     -58÷302(°F)

2UAO| 100.0| 100.0| Pr2| Temperature value associated to the maximum

value of analogue output2, 10V or 20mA

| -50.0÷150.0(°C)     -58÷302(°F)
2AOM| 0| 0| Pr2| Minimum value of analogue output 2| 0 ÷ 100 (%)
2AOt| 0| 0| Pr2| Time with analog output 2 at max when after exceeding AOM| 0÷15s
2MPM| 100| 100| Pr2| Maximum % variation per minute, analog output 2| nu, 1 ÷ 100%
2SAO| 80| 50| Pr2| Percentage of analog output 2 in case of probe failure| 0 ÷ 100 (%)
2AOH| 70| 70| Pr2| Maximum analog output 2 percentage when silence mode function is enabled| 0 ÷ 100 (%)
tbA| YES| YES| Pr1| Alarm relay silencing| no – yES
OAP| cL| cL| Pr2| Polarity alarm relay| OP – CL
oFF| No| No| Pr2| off function enabled| no – yES
bUr| YES| YES| Pr2| Buzzer enabled| no – yES
Adr| 1| 1| Pr2| Serial address| 1 ÷ 247
rEL| 3.5| 3.5| Pr2| Release firmware| Readable only
SrL| –| –| Pr2| Sub-Release firmware| Readable only
Ptb| –| –| Pr2| Parameter table code| Readable only
Pr2| –| –| Pr1| Pr2 access| Readable only

Dixell S.r.l. – Z.1. Via dell’Industria, 27 – 32016 Alpago (BL) ITALY
Tel. +39.0437.9833 r.a. – Fax +39.0437.989313 – EmersonClimate.com/Dixell – dixell@emerson.com

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