background image

31

5.17 - High pressure load shedding function

This function does not require an additional board. It prevents
high pressure a break on a circuit by the following means:

Preventing any capacity increase on the circuit once the
high pressure value has reached an initial threshold.

Shedding one or more capacity stages once a second
protection threshold has been reached.

In the event of capacity stages being shed, no capacity increase
will be authorised on the circuit concerned for a period of 5
minutes.

5.18 - Pumping down

When the lead compressor in each circuit is started or stopped,
that circuit goes through a pumping down cycle to purge the
evaporator and suction line of refrigerant. The maximum
duration of this cycle is 3 minutes.

5.19 - Master/slave assembly

Two PRO-DIALOG Plus units can be linked to produce a master/
slave assembly. The two machines are interconnected over the
CCN bus. All parameters required for the master/slave function
must be configured through the Service configuration menu.

Master/slave operation requires the connection of a temperature
probe at the common manifold on each machine, if the heat
exchanger leaving water temperature is controlled.

The master/slave assembly can operate with constant or variable
flow. In the case of variable flow each machine must control its
own water pump and automatically shut down the pump, if the
cooling capacity is zero. For constant flow operation the pumps
for each unit are continuously operating, if the system is opera-
ting. The master unit can control a common pump that will be
activated, when the system is started. In this case the slave unit
pump is not used.

LOCAL OPERATING MODE

PARAMETER STATUS

HEATING/
COOLING
OPERATING
MODE

cooling
cooling
heating
holidays
holidays

ACTIVE SETPOINT

cooling setpoint 1
cooling setpoint 2
heating setpoint
cooling setpoint 1
cooling setpoint 2

LOCAL
SETPOINT
SELECTION

sp 1
sp2
-
auto
auto

SCHEDULE 2
PROGRAM STATUS

-
-
-
occupied
unoccupied

HEATING/
COOLING
OPOERATING
MODE

heating
cooling
cooling
-
-

ACTIVE SETPOINT

heating setpoint
cooling setpoint 1
cooling setpoint 2
cooling setpoint 1
cooling setpoint 2

CONTROL
CONTACT

-
sp 1
sp2
holidays
holidays

SCHEDULE 2
PROGRAM STATUS

-
-
-
occupied
unoccupied

REMOTE OPERATING MODE

PARAMETER STATUS

HEATING/COOLING
OPERATING MODE

cooling
cooling
heating

ACTIVE SETPOINT

cooling setpoint 1
cooling setpoint 2
heating setpoint

SCHEDULE 2
PROGRAM STATUS

occupied
unoccupied
-

CCN OPERATING MODE

PARAMETER STATUS

All control commands to the master/slave assembly (start/stop,
setpoint, heating/cooling operation, load shedding, etc.) are
handled by the unit which is configured as the master, and must
therefore only be applied to the master unit. They will be trans-
mitted automatically to the slave unit. The master unit can be
controlled locally, remotely or by CCN commands. Therefore
to start up the assembly, simply validate the Master operating
type (MASt) on the master unit. If the Master has been confi-
gured for remote control then use the remote volt-free contacts
for unit start/stop. The slave unit must stay in CCN operating
type continuously. To stop the master/slave assembly, select
Local Off (LOFF) on the master unit or use the remote volt-
free contacts if the unit has been configured for remote control.

One of the functions of the master unit (depending on its con-
figuration) may be the designation, whether the master or slave is
to be the lead machine or the follower. The roles of lead machine
and follower will be reversed when the difference in running
hours between the two units exceeds a configurable value,
ensuring that the running times of the two units are automatically
equalised. The changeover between lead machine and follower
may take place when the assembly is started up, or even whilst
running. The running time balancing function is not active if it
has not been configured: in this case the lead machine is
always the master unit.

The lead machine will always be started first. When the lead
machine is at its full available capacity, start-up delay (confi-
gurable) is initialised on the follower. When this delay has
expired, and if the error on the control point is greater than 1.7°C,
the follower unit is authorised to start and the pump is activated.
The follower will automatically use the master unit active set-
point. The lead machine will be held at its full available capa-
city for as long as the active capacity on the follower is not
zero. When the follower unit receives a command to stop, its
evaporator water pump is turned off with 20 seconds delay.

In the event of a communication fault between the two units,
each shall return to an autonomous operating mode until the
fault is cleared.  If the master unit is halted due to an alarm, the
slave unit is authorised to start without prior conditions.

5.20 - Controlling Pro-Dialog Plus units with a System
Manager

Up to eight PRO-DIALOG Plus units (or System Manager
compatible units) can be controlled by one control module of
the FSM or CSM III type which can handle multi-tasking of
control functions such as starting units in sequence.

Содержание PRO-DIALOG Plus 30GK Series

Страница 1: ...1 30GK Series PRO DIALOG Control Air Cooled Liquid Chillers 50 Hz Installation operation and maintenance instructions ...

Страница 2: ... 2 1 Description 11 4 2 2 Stopping the unit in local mode 11 4 2 3 Starting unit and selecting an operating type 11 4 3 Menus 12 4 3 1 Selecting a menu 12 4 3 2 Selecting a menu item 12 4 3 3 Modifying the value of a parameter access to a sub menu 12 4 3 4 Expand display 12 4 4 General menu structure 13 4 5 Menu tree structure 14 4 5 1 Description of the Information menu 15 4 5 2 Description of th...

Страница 3: ...ead circuit 29 5 11 Circuit loading sequence 29 5 12 Slave compressor start up sequence 30 5 13 Controlling the EXV 30 5 14 Head pressure control on air cooled units 30 5 15 Head pressure control on water cooled units 30 5 16 Active setpoint selection 30 5 17 High pressure load shedding function 31 5 18 Pumping down 31 5 19 Master slave assembly 31 5 20 Controlling Pro Dialog Plus units with a Sys...

Страница 4: ...mission may be permitted access to electrical components It is parti cularly recommended that all sources of electricity to the unit be shut off before any work is begun Shut off the main power supply at the main circuit breaker or isolator IMPORTANT Risk of electrocution Even when the main power isolator or circuit breaker is off it is still possible for certain compo nents such as crankcase heat...

Страница 5: ... is controlled by commands from the Carrier Comfort Network CCN In this case a data communication cable is used to connect the unit to the CCN communication bus The operating mode must be chosen with the Operating Type selection button described in section 4 2 1 When the PRO DIALOG Plus system operates autonomously Local or Remote mode it retains all of its own control capa bilities but does not o...

Страница 6: ...d This board can be used to control fan stages PD4 EXV board This board can control two EXV valves and two suction temperature sensors 4xAI 2xAO board This optional board can be used to read sensors oil pressure or to control variable speed fans air cooled units or the condenser valve water cooled units NRCP BASE board This optional board is used to control the inputs and outputs of the heat recla...

Страница 7: ...2xAO board which can deliver a 0 10 V d c or 4 20 mA signal depending on the configuration 3 2 3 The user interface The user interface is in two parts The main interface This gives access to all of the control parameters for the unit It consists of a 2 digit primary display block and a secondary 4 digit display block with 10 LEDs and 5 buttons The summary interface This gives quick access to just ...

Страница 8: ...h 3 3 6 Thermistors These all have similar characteristics Evaporator entering water temperature sensor The evaporator entering water temperature sensor is installed in the evaporator wall in the free space at the side of the tube bundle Evaporator leaving water temperature sensor The evaporator leaving water temperature sensor is installed in evaporator leaving water piping The sensor bulb is dir...

Страница 9: ...e supplied by a user command or a 0 10 V temperature sensor A RS 485 bus is used for connection to the CCN The CCN connector is located on the CCN clock board inserted on the PD4 Basic Board Pin 1 signal Pin 2 ground Pin 3 signal REMARKS Volt free contacts 24 V a c 48 V d c max 20 V a c or V d c 3 A max 80 mA min external power supply Connector 6 pin WAGO 231 306 026000 pitch 5 08 24 V a c 20 mA C...

Страница 10: ...ed INPUTS menu Displays the status of the unit digital and analogue inputs OUTPUTS TESTS menu Displays the status of the unit outputs and enables them to be tested CONFIGURATIONS menu Displays the unit configuration and enables it to be modified ALARMS menu Displays active alarms ALARMS HISTORY menu Displays the history of the alarms OPERATING LOG menu Displays the operating times and number of st...

Страница 11: ...LAY DESCRIPTION LOFF Local Off The unit is halted in local mode L On Local On The unit is in local control mode and is authorised to start L Sc Local On timer control The unit is in local control mode It is authorised to start if the period is occupied If the timer program for unit operation is unoccupied the unit remains shut down until the period next becomes occupied CCN CCN The unit is control...

Страница 12: ... Once the required value is obtained press the Enter button again to validate the change or to access the sub menu The LED for the menu to which the item belongs then stops flashing indicating that modification mode no longer applies In modification mode the value to be modified increases or decreases in steps of 0 1 every time you press the Arrow buttons Holding one of these buttons down increase...

Страница 13: ...ERVICE 1 SErviCE 1 SERVICE 2 SErviCE 2 SERVICE 3 SErviCE 3 MASTER SLAVE MAStEr SLAvE PERIOD 3 PEriod 3 PERIOD 4 PEriod 4 PERIOD 5 PEriod 5 PERIOD 6 PEriod 6 PERIOD 7 PEriod 7 PERIOD 8 PEriod 8 PERIOD 1 PEriod 1 PERIOD 2 PEriod 2 HOLIDAYS 3 HoLidAy 3 HOLIDAYS 4 HoLidAy 4 HOLIDAYS 5 HoLidAy 5 HOLIDAYS 6 HoLidAy 7 HOLIDAYS 7 HoLidAy 7 HOLIDAYS 8 HoLidAy 8 HOLIDAYS 15 HoLidAy15 HOLIDAYS 16 HoLidAy16 H...

Страница 14: ...Cooling setpoint 2 Heating setpoint Condensing setpoint Heat reclaim setpoint Demand limit setpoint in Cooling mode ramp Heating mode ramp Cooling threshold for zero reset Cooling threshold for max reset Cooling max reset value Heating threshold for zero reset Heating threshold for max reset Heating max reset value INPUTS Contact 1 remote on off Contact 2 remote setpoint Contact 3 remote heating c...

Страница 15: ...e if forced through CCN Start up delay This item indicates the minutes left before the unit can be started This delay at start up is always active after the unit has been switched on The delay can be configured in the User Configuration 1 menu Heating cooling on selection This item is accessible in read write if the unit is in local control mode It is only displayed if the unit is in LOFF L On or ...

Страница 16: ...Circuit A or circuit B operates in heat reclaim mode and not in standard cooling mode pumpdown phase is activated Mode active if risk of frost exists Two evaporator water pumps installed on the unit and pump reversal is active See section 5 3 The unit is shut down and is started every day at 14 00 hours for 2 seconds This function must be configured in the User1 menu See sections 5 3 and 4 5 7 3 U...

Страница 17: ...ts you display and modify the heat reclaim setpoint As item 3 this is used for condensing setpoint control Capacity limit setpoint Limitation by volt free contact This item is used to define the maximum capacity that the unit is authorised to use if the capacity limit contact activate the limit See section 5 8 Cooling ramp loading rate This parameter is only accessible if the ramp function is vali...

Страница 18: ...9 1 nn n Legend 1 This item is displayed in certain unit configurations only 2 Access to this menu is read only Active in all operating types See section 3 4 COMMENTS Remote contact 1 status This contact is used to start contact closed and stop contact open the chiller It is only valid if the unit is in the remote operating control rEM mode Remote contact 2 status This contact is used to select a ...

Страница 19: ...the following display appears Fail displayed if the test has failed because the pump is not started Good displayed if the test succeeds Evaporator water pump No 2 command status Not displayed if unit does not control a pump On the pump operates Stop the pump has stopped Forc This item is only displayed if the unit is in local off mode LOFF Selecting this item permits energising the pump without de...

Страница 20: ...ctivity i e no buttons pressed or after powering up SUB MENU USER CONFIGURATION SCHEDULE 1 ScHEduLE 1MEnu Return to previous menu SUB MENU Period 1 PErIod 1 SUB MENU Period 2 PErIod 2 SUB MENU Period 3 PErIod 3 SUB MENU Period 4 PErIod 4 SUB MENU Period 5 PErIod 5 SUB MENU Period 6 PErIod 6 SUB MENU Period 7 PErIod 7 SUB MENU Period 8 PErIod 8 DATE dAtE Return to previous menu Hour Day of the week...

Страница 21: ...pied period 2 End of occupied period 3 Selection Monday 4 Selection Tuesday 5 Selection Wednesday 6 Selection Thursday 7 Selection Friday 8 Selection Saturday 9 Selection Sunday 10 Selection holidays USER USEr CONFIGURATION PERIOD 1 PERIOD 2 PERIOD 3 PERIOD 4 PERIOD 5 PERIOD 6 PERIOD 7 PERIOD 8 USER2 USEr 2 SCHEDULE 1 SCHEduLE 1 SCHEDULE 2 SCHEduLE 2 HOLIDAYS HOLIDAYS HOUR DATE dAtE BROADCAST broA...

Страница 22: ...rs when the rotation delay is elapsed If the manual sequence is selected then the selected pump is used in priority Change over occurs if one pump fails 6 1 24 to 3000 hours 48 Pump changeover delay Displayed if auto pump sequence is selected This parameter is used for pump auto rotation the control tries to limit the pump run time difference to the pump changeover delay value Change over between ...

Страница 23: ...ides two timer programs time schedule 1 and time schedule 2 The first timer program schedule 1 provides a means to automatically switch the unit from an occupied mode to an unoccupied mode the unit is started during occupied periods The second timer program schedule 2 provides a means to automatically switch when auto mode is selected the active setpoint from an occupied setpoint to an unoccupied ...

Страница 24: ...1h00 Public holidays P7 period 7 Not used in this example P8 period 8 Not used in this example Occupied Unoccupied MON Monday TUE Tuesday WED Wednesday THU Thursday FRI Friday SAT Saturday SUN Sunday HOL Public holidays 4 5 7 7 Description of the Holidays sub menus This function is used to define 16 public holiday periods Each period is defined with the aid of three parameters the month starting d...

Страница 25: ...adcaster will adjust its time for the start of daylight 1 to 1440 minutes saving time 9 nn Daylight saving stop month In this mode you enter the month in which the broadcaster will adjust its time for the end of 1 to 12 daylight saving time 10 nn Daylight saving stop day In this mode you enter the day on which the broadcaster will adjust its time for the end of daylight 1 to 31 saving time 11 n1 n...

Страница 26: ...ressor B4 starts NOTES 1 This item is masked when not used Certain values are divided by 10 or by 100 so that number of hours or start ups of less then 10 are displayed as 0 When the value is divided by 10 or by 100 it is displayed in turn with M 10 or M100 4 5 10 2 Description of the Runtimes 2 menu RUNTIMES MENU 2 iTEM FORMAT UNIT COMMENTS 0 When selected this item authorises return to the previ...

Страница 27: ...formation menu and by the heat cool LEDs on the summary interface ON OFF STATUS Off On On On On On On CONTROL TYPE Local Local Remote Remote CCN CCN HEATING COOLING SELECTION IN LOCAL MODE Cooling Heating REMOTE HEATING COOLING CONTACTS Cooling mode Heating mode HC_SEL Cooling Heating OPERATING MODE Cooling Cooling Heating Cooling Heating Cooling Heating PARAMETER STATUS ACTIVE OPERATING TYPE STAT...

Страница 28: ...sor is activated 5 5 Control interlock contact This contact can control the status of the water loop Its function is to prevent unit start up if it is open and if the start up delay has passed Furthermore this contact must remain closed when the unit is not in local off remote or CCN control mode Opening this contact for more than 8 seconds while the unit is operating will cause immediate shut dow...

Страница 29: ...and the difference between entering and leaving water temperatures in order to determine the optimum moment at which to add or withdraw a capacity stage NOTE If the same compressor undergoes too many starts per hour this automatically brings about reduction of compressor starts which makes leaving water temperature control less precise 5 10 Determining the lead circuit This function commands the s...

Страница 30: ...eat with the fans When the second condensing setpoint is selected reclaim setting the control system will automatically revert to controlling by reference to a setpoint even if control by reference to the EXV has been selected The original configuration is reinitialised when the first condensing setpoint is re selected NOTE Certain units can have up to 8 fan stages of which one per circuit is a va...

Страница 31: ...TING MODE PARAMETER STATUS All control commands to the master slave assembly start stop setpoint heating cooling operation load shedding etc are handled by the unit which is configured as the master and must therefore only be applied to the master unit They will be trans mitted automatically to the slave unit The master unit can be controlled locally remotely or by CCN commands Therefore to start ...

Страница 32: ...m mand However any faults active when the supply is inter rupted are saved and may in certain cases prevent a circuit or a unit from restarting A manual reset must be run from the main interface using the following procedure RESET OF ACTIVE ALARMS OPERATION ITEM NUMBER ITEM VALUE PRESS MENU 2 DIGIT DISPLAY 4 DIGIT DISPLAY BUTTON LED Hold down the MENU button until the LED 0 for alarms lights The 4...

Страница 33: ...communication with compressor board A1 Communication with the compressor Circuit A shut down No Auto Wiring fault faulty module board is lost incorrect module address 27 Loss of communication with compressor board A2 Ditto Compressor A2 shut down No Auto Ditto 28 Loss of communication with compressor board A3 Ditto Compressor A3 shut down No Auto Ditto 29 Loss of communication with compressor boar...

Страница 34: ...e two units for more than 2 mins 68 Master slave configuration error Poor master slave configuration Master slave control not allowed Auto manual in Master slave configuration case of heating fault cooling fault 69 Initial factory configuration necessary All factory parameters are at zero Unit prevented from starting Auto No factory configuration 70 Poor factory configuration Poor factory configur...

Страница 35: ...mpressor B2 shut down Ditto Hot gas thermostat contact open 602 Starter Guard fault compressor B 2 Compressor B2 shut down Ditto Crankcase heater fault and open motor current fault detection board contact 701 DGT fault compressor B3 Compressor B3 shut down Ditto Hot gas thermostat contact open 702 Starter Guard fault compressor B3 Compressor B3 shut down Ditto Crankcase heater fault and open motor...

Страница 36: ...76 05 2000 Supersedes order No New Manufactured by Carrier S A Montluel France Manufacturer reserves the right to change any product specifications without notice Printed in the Netherlands on totally chlorine free paper ...

Отзывы: