Stulz C7000 User manual

OPERATING INSTRUCTIONS Index G57
Issue 6.2019
C7000
Original instructions
Microprocessor

EN/06.2019/G57 © STULZ GmbH – all rights reserved
C7000 INSTRUCTIONS FOR A/C UNITS
Editor
STULZ GmbH
Holsteiner Chaussee 283
22457 Hamburg
ABOUT STULZ
Since it was founded in 1947, the STULZ company has
evolved into one of the world’s leading system suppliers of
air-conditioning technology.
Since 1974 the group has seen continual international
expansion of its air conditioning technology business, spe-
cialising in A/C for data centres and telecommunications
installations.
STULZ has ten production plants (2 in Germany, Italy,
the USA, Great Britain, Spain, 2 in China, Brazil and India)
and twenty subsidiaries (in Germany, France, Italy, Great
Britain, Belgium, Brazil, the Netherlands, New Zealand,
Mexico, Austria, Poland, Spain, Singapore, China, India,
Indonesia, South Africa, Sweden, Australia and the USA).
The company also co-operates with sales and service
partners in over 140 other countries, and therefore boasts
an international network of air-conditioning specialists.

3© STULZ GmbH – all rights reserved EN/06.2019/G57
C7000 INSTRUCTIONS FOR A/C UNITS
Contents
1. Presentation of the system ............................................................................... 5
2. Operator interface ............................................................................................. 6
2.1 Operational elements - C7000IOC................................................................................. 6
2.2 Operational elements - C7000 Advanced.................................................................... 7
2.3 Operational elements - C7000 Display ......................................................................... 9
3. Controller start................................................................................................. 10
4. Info menus........................................................................................................ 16
4.1 Info commands - C7000.................................................................................................. 16
5. Configuration ................................................................................................... 34
5.1 Loading a new Software ................................................................................................... 36
5.2 Control commands - C7000........................................................................................... 37
5.3 Values...................................................................................................................................... 38
5.4 Components ......................................................................................................................... 58
5.4.1 Sensor........................................................................................................................... 58
5.4.2 Refrigerant circuit, Standard................................................................................. 61
5.4.3 Refrigerant circuit, optional components......................................................... 73
5.4.4 Cooling water circuit, internal components...................................................... 77
5.4.5 Cooling water circuit, external components .................................................... 84
5.4.6 Air circuit, internal standard components......................................................... 87
5.4.7 Air circuit, internal optional components........................................................... 98
5.4.8 Air circuit, external optional components ...................................................... 102
5.4.9 Auxiliary Ports ......................................................................................................... 103
5.5 Statistics.............................................................................................................................. 105
6. Special operation modes .............................................................................. 108
6.1 Week program................................................................................................................... 108
6.2 Zone control....................................................................................................................... 109
6.2.1 Sequencing.............................................................................................................. 114
6.2.2 CW Standby Management.................................................................................. 115
6.2.3 Zone for DFC control............................................................................................ 116
6.3 Ecocool................................................................................................................................ 121
6.4 Operation modes for CW2 units ................................................................................. 130
6.5 Differential pressure control......................................................................................... 133
6.6 Supply air pressure standby management (SAPSM) ........................................... 135
6.6.1 SAPSM and no supply air pressure control in case of sensor failure ... 140
6.7 Differential temperature control ................................................................................. 141
6.8 Summer-/winter operation........................................................................................... 145
6.9 Manual Operation............................................................................................................. 146
6.10 UPS operation................................................................................................................ 147
6.11 ACT - Adaptive Cooling Technology........................................................................ 148
6.12 Calculation of the Air Volume Flow .......................................................................... 149
6.13 Power indication............................................................................................................ 150
6.14 Control of a Uk24mod gateway............................................................................... 151
6.15 Special software option for CyberLab units......................................................... 153
Subject to technical modifications.

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C7000 INSTRUCTIONS FOR A/C UNITS
7. Bus communication....................................................................................... 154
7.1 System architecture with the C7000IOC ................................................................ 154
7.2 System architecture with the C7000AT................................................................... 155
7.3 Bus Layout ......................................................................................................................... 156
7.3.1 General...................................................................................................................... 156
7.3.2 Configuration of the IO bus................................................................................. 156
7.3.3 Preparation before Installation.......................................................................... 157
7.3.4 Setting the Bus Address...................................................................................... 157
7.3.5 Bus overview ........................................................................................................... 159
7.3.6 Special cases .......................................................................................................... 160
8. Alarm treatment............................................................................................. 163
8.1 Alarm display...................................................................................................................... 163
8.2 Alarm Reset........................................................................................................................ 163
8.3 Configuration of external and unit alarms................................................................ 164
8.4 Alarm texts.......................................................................................................................... 165
8.5 Alarm texts in the case of hardware errors .............................................................. 167
9. Troubleshooting............................................................................................. 168
10. Hardware components................................................................................ 170
10.1 I/O controller (C7000IOC)......................................................................................... 170
10.2 EDIO - extension board for digital in- and outputs............................................ 172
10.3 EAIO - extension board for analog in- and outputs........................................... 174
10.4 EBUS-extension board for RS485 bus ................................................................ 176
10.5 Driver module for electronic expansion valve EVD............................................ 177
10.6 C7000 Advanced - Terminal (C7000AT).............................................................. 178
10.6.1 Driver module....................................................................................................... 179
10.7 C7000 Display............................................................................................................... 180
11. Default configurations ................................................................................ 182
11.1 Preconfigurations ......................................................................................................... 196

5© STULZ GmbH – all rights reserved EN/06.2019/G57
C7000 INSTRUCTIONS FOR A/C UNITS
This manual is based on the software versions IOCV6.85 and ATV4.73.
The C7000 control system offers a maximum of
operating safety for industrial applications combined
with two versions for the operator interface. The
C7000IOC takes charge of the control in itself and
the optional C7000 Advanced serves as a comforta-
ble operator interface.
Each A/C unit has its own controller while all control-
lers can be linked together in a bus system.
Beyond the basic cooling functions, the C7000 con-
trol system provides some interesting features like an
intelligent management of high/low pressure-alarms,
a proportional fan speed control which opens a wide
spectrum of applications and time-based functions
like:
- week timer
- unit sequencing within definable unit groups
A watchdog on the IOC board monitors the CPU
function and produces a restart, as soon as for 0,5
seconds no CPU activity could be detected.
The core of the C7000 control system is the C7000
I/O controller on which up to 4 EAIO/EDIO for
additional in- and outputs can be perpendicularly
plugged.
The C7000 control systems manages 3 busses:
1. RS485 IO-bus for the communication among the
A/C units
2. RS485 BMS-bus for the communication with a
building management system
3.RS485 component bus (e.g. for EVD {driver mod-
ule for expansion valve}, µPC )
For service purposes like software download and
control via laptop a RS232 interface is located on the
I/O controller the same as on the C7000 Advanced.
1. Presentation of the system
IICBus: internal data bus in the IO controller
EAIO: Extension board for analog in- and outputs
EDIO: Extension board for digital in- and outputs
EBUS: Extension board for a RS485 bus
Analog (A) and digital (D) in- and outputs
AIN AOUT DIN DOUT
IOC 4 4 11 7
EAIO 4 4 / /
EDIO / / 8 6
Maximum equipment
IOC + 4 EAIO 20 20 11 7
IOC + 4 EDIO 4 4 43 31
Interfaces
IOC
1  RS485 IO bus, terminals
4  IICBus, SUBD15
EBUS connection SUBD15
RS232, SUBD9
EAIO IICBus, SUBD15
EDIO IICBus, SUBD15
EBUS
I/O controller connection SUBD15
RS485 BMS-bus, terminals
RS485 component bus, terminals
C7000AT 2  RS485 IO-bus + BMS, terminals
2  RS232 BMS + service, SUBD9

6
iobus
iobusok
sensor 1
comp 1
suctionv 1
gecwv 1
gvalve 1
drycool 1
pump 1
eheat 1
gasheat
pwwheat
humi 1
dehumi
fan 1
louver 1
equip
is 1
state
ups
wprg
event
log 1
option
exalarmin 1
zone 1
loaddefault dx1
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C7000 INSTRUCTIONS FOR A/C UNITS
2. Operator interface
2.1 Operational elements - C7000IOC
The operational elements for the C7000IOC i.e. the
I/O controller consist of the keyboard of your PC
or laptop. You operate the C7000IOC by specified
commands which follow an easily comprehensible
syntax.
To establish the connection from your PC to the
C7000 you need a 9-line cable with SUBD 9 con-
nectors at both ends (crossed type), which can be
obtained as an option and a terminal program e.g
"C7000Serice".
Connect the cable at a serial port of your PC and at
the service port X15 on the IOC.
To prevent a destruction of electronical elements due
to potential differences, use a laptop with battery
supply when connecting the laptop to the C7000IOC
service port.
Start the terminal program.
If your PC is not equipped with a serial RS232 inter-
face, you may use a RS232USB converter.
You can now communicate with the connected
C7000IOC, in return the IOC sends the following
prompt to your PC:
"ioc ##:>", where ## represents the bus address.
The commands can be classified into three major categories:
1. bus specific control commands
2. commands related to A/C unit components
3. commands concerning the whole A/C unit
1. bus command 2. component command 3. A/C unit command
Each command displays a detailed help for further
parameters (if there are any) when it is followed by "h"
like e.g. "comp h".
A command of the second (component command) or
third category (unit comm.) which is typed in without
any parameters displays all the information about its
subject (except "loaddefault ###" which is an exe-
cution command).
The commands of the 2nd and 3rd category will be
largely explained in the context of the description of
the C7000 functions.
The iobus command edits the actually stored
IO-bus-configuration.
The commands on a lightgrey (yellow) background need
no further parameters. The commands which are followed
by a number need this number because there are several
components of the same type.

7© STULZ GmbH – all rights reserved EN/06.2019/G57
C7000 INSTRUCTIONS FOR A/C UNITS
This command is a control command and shows nei-
ther help nor information but execute the command
right after pressing the return/enter-key.
The counting of any digital or analog in- or output
begins with number 1. Despite this the digital/analog
in- or output 0 can be assigned to any component.
This will allow the component to stay part of the con-
figuration even if it does not take part in the control.
A double assignment of inputs and outputs is tech-
nically possible but only reasonable in exceptional
cases.
Outputs in the languages English and German are
available at the service port.
If within a command, where the input of a number is
expected, nothing is entered, the terminal program
interprets this as "0".
Whenever a parameter is expressed by a logi-
cal function, 0 means no, disabled, 1 means yes,
enabled.
If at unit start no valid configuration is found, a mini-
mum configuration is loaded.
Note that no year date below 2000 can be entered.
Selector key You can select menus and change parameters with the selector key
Confirmation key You acknowledge the functions/parameters selected with the selector key with the con-
firmation key.
Reset key Alarm signals are acknowledged with the reset key. Press it once to silence the
alarm tone. Press it a second time to clear the alarm message (if the cause has been
eliminated).
LED alarm This LED display flashes in the event of an alarm and remains lit after the reset key has
been pressed once.
LED start/stop This LED display lights up when at least one C7000IOC within the bus is switched on.
On/off key The control of the selected A/C unit is switched on/off with this key. If the on/off protec-
tion is enabled the control is switched on/off with a delay or after having entered a pass-
word (details on page 12).
Audible indicator The audible indicator issues an alarm tone when an alarm has occurred.
Display The display shows data, operating conditions and information for the operator's
guidance.
<> = Selector key
Ok = Confirmation key
Reset = Reset key
LED = Alarm
LED = On/off
= On/off key
Display
Audible indicator
2.2 Operational elements - C7000 Advanced

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C7000 INSTRUCTIONS FOR A/C UNITS
Operation - Navigation through the menus
The principal keys to navigate in and across the menus are the
selector key and the confirmation key, which have the function of the
mouse for a PC. The cursor, to keep the analogy with a PC, is repre-
sented by the inverse display of a field content. This field may contain
an expression, a number or a symbol.
There are two types of menus: Selection menus and parameter men-
us. In selection menus you can choose a menu point with the help
of the selector key and after having pressed the confirmation key it
will bring you to the next submenu. To get to the next menu on a level
above there is a "Return"-field in the top left corner of every menu.
In parameter menus, which represent the end of a menu branch,
you can select parameters with the selector key, but if you press the
confirmation key, the parameter is displayed black on a clear back-
ground with a black frame and indicates this way the change mode.
By the selector key you can change the parameter value. Pressing
the confirmation key finishes the modification and displays the cur-
sor inversely again. Below the smallest value appears the symbol of
an arrow to the left. If you select this arrow and press the confirma-
tion key, the enter mode of the parameter is left without modification
of this one.
Selection menu
Parameter menu
In a few parameter menus, there is the note "more" in the bottom frame line, which indicates that another win-
dow will be displayed after the last parameter. You can also reach this window by typing the selector key "<"
when the cursor is on the field "return".
Note:
After the C7000AT has displayed a submenu of an C7000IOC for 10 minutes without key activation, it will
show the main menu of the corresponding unit again.

9© STULZ GmbH – all rights reserved EN/06.2019/G57
C7000 INSTRUCTIONS FOR A/C UNITS
Reset key Alarm signals are acknowledged with the reset key. Press it once to silence the
alarm tone. Press it a second time to clear the alarm message (if the cause has been
eliminated).
LED alarm This LED display flashes in the event of an alarm and remains lit after the reset key has
been pressed once.
LED start/stop This LED display lights up when the control of the A/C unit is switched on.
Start/stop key The control of the A/C unit is switched on/off with this key.
Audible indicator The audible indicator issues an alarm tone when an alarm has occurred.
Display The display shows the actual temperature and humidity, operating states and alarms.
Display
Audible indicator
Cooling
Heating
Humidification
Dehumidification
Request sent
Actual temperature
Actual humidity
Alarm
Response received
The status request is sent to the C7000IOC in a
fixed cycle of 3 seconds. During the request the
symbol is displayed.
As soon as a formally correct response is recei-
ved the following symbol flashes once.
If no response has been received after three
consecutive requests, question marks are dis-
played instead of the temperature and humidity.
Display with the control switched off:
2.3 Operational elements - C7000 Display
Reset = Reset key
LED = Alarm
LED = On/off
= On/off key

10
= OK
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C7000 INSTRUCTIONS FOR A/C UNITS
3. Controller start
C7000AT
After having switched on the pow-
er supply of the C7000AT the bus
overview will appear.
With the selector key you can
choose the unit which you want to
control.
A symbol/unit which is selected, is
displayed inversely.
Empty bus positions will be skipped.
When you have selected a
C7000IOC and confirmed by the
OK key, the main menu for the
C7000IOC is displayed.
When you have selected a C7000AT
and confirmed by the OK key, after
having entered the AT password
the main menu for the C7000AT is
displayed.
Confirmation view
Main menu for C7000IOC
Main menu C7000AT
After having marked the last bus
participant position (bus address 14
in the example) you get to the fol-
lowing display, with the selector key,
where all units are marked.
In this state you can switch on/off
the whole system by the local on/
off key.
Commands
state start
state stop
The control/the A/C unit is started.
The control/the A/C unit is stopped.
If some units are in operation, all units are switched off if you press the on/off key.
(Details see on/off protection, on the next page but one).
If you press the OK-button when all positions are marked the existing configuration is confirmed after the request
and entry of the AT-password.