Boiler module and operator-control unit with for heating boilers Product brochure GB 10.5.2.2 Edition 02.04 odulating burner control unit with integral or external ignition Diverse possible applications thanks to heating and hotwater control for all hydraulic systems Weather-dependent control onitoring of boiler, flue gas and hydraulic system Boiler and installation frost protection Universal fan interfaces, PW and 0 10 V Easy installation thanks to unchangeable connections Easy-to-service thanks to PC connection for programming and diagnosis on site Telecontrol via telephone network Individualism thanks to customised design of the operatorcontrol unit www.kromschroeder.com
2 K921 with Edition 02.04 Application Heating control system, consisting of boiler module and operator-control unit, for control and regulation of fanassisted gas heating boilers with modulating burner control unit and pneumatic gas-air ratio control. The boiler module performs all safety and control functions in heating boilers of all capacity classes. An ignition transformer is integrated and a connection facility for an external ignition transformer is provided. The boiler module is prepared for integrated valve control. The boiler module is suitable for any installation position and the low current consumption means that the operating temperature remains low. All electrical connections are of the plug-in type and unchangeable coded. The parameters required for the are set and displayed in several languages via the operator-control unit. The large dot-matrix display with automatic backlighting and menu-prompted plain-text display facilitates read-in and read-out of setpoints, operating modes, diagnostic information and process values. Absence times and absence temperatures can be set using the integrated, multi-channel timer. Features of the include among other things weather-dependent control and the anti-legionnaire s disease function. External operation-control modules, mixer modules and cascade controllers from the Kromschröder CXE range can be connected via the CAN-bus interface. The optional PC software and the CoCo PC aktiv interface allow remote programming and scanning with the option of fault and error output via the telephone network. The optional boiler chip card with works programming of function parameters, e.g. boiler capacity, various pre-purging times and safety times, allows simple variant handling and project updating. Boiler module and operator-control unit for controlling heating boilers. Heat generation with automatic boiler control. Weather-dependent heating control in buildings. Customised design of the, shown here with sealed keypad.
K921 with Edition 02.04 3 Example applications 0 10 V bar Hall sensor KFBN AGBN Digital Digital Digital Digital Input Input Digital Input Input Input Input V1 Boiler Chip Card V2 PC 0 10 V 0 10 V with Nine actuators, e.g. alarm devices, fans, pumps and diverter valves, can be controlled. Three of these actuators are defined as safety-related outputs for the automatic burner control unit. Regulation and control signal outputs, such as 0 10 V and PW for modulating pumps, fans, frequency converters and building services management systems, are provided. Six inputs for safety-related and non-safety-related digital sensing elements, e.g. air pressure switches, flow detectors and gas pressure switches. In addition, a Hall sensor input is available. Other features Up to nine analogue inputs for probes, sensors and setpoint devices. Connection facility for safety temperature sensor. ΔT control for optimising the efficiency and for protecting the heat exchanger. Control of a peak-load boiler directly via the boiler module. Boiler monitoring by temperature monitoring, gradient monitoring and flow monitoring. The flow temperature is calculated dependent on outside temperature with the aid of weather-dependent control. TWW TWW Hydraulic systems The boiler module and the operatorcontrol unit can be used for various hydraulic systems and controlled via a programmable relay, depending on mode of operation hot-water priority or parallel operation and the connected actuators, e.g. hot-water feed pump, diverter valve for hot water, circulation pump or external heating pump. System with hot-water feed pump System with hot-water diverter valve TWW System with hydraulic distributor System for directly heated storage tanks
K921 with Edition 02.04 4 ϑ B Room temperature-dependent control The optional operation-control module B extends the functions of the boiler module and the operator-control unit, e.g. in order to detect the room temperature, detect temperature setpoints and control time programs. Up to 15 operation-control modules can be connected to the heating system. B BUS B B ixer circuit control Up to 15 independent mixer circuits can be controlled, each with an optional operationcontrol module B and an optional mixer module. Each mixer circuit features its own time programs and is controlled individually. 1 1 15 BUS E8 Independent heating circuits Optional heating controllers E8 for independent control of two heating circuits. Control of weather-dependent control and hot-water heating. E8 B 1 2 B BUS 1...15 KK Cascade control The cascade module KK controls up to eight modulating, single-stage or two-stage-controlled boilers. Up to 15 mixer circuits can be set up in conjunction with the mixer modules and operation-control modules B. 1 2 KK 1...8
5 K921 with Edition 02.04 PC Software PC Software CoCo PC aktiv odem Remote diagnosis Parameters can be set directly on the heating boiler and diagnostic data can be polled from the boiler module via PC and software. A connection can be set up to the telephone and mobile radio network via the CoCo PC aktiv interface and a modem. Errors and warning signals of the boiler module can be read out as mobile phone text messages (SS). Parameters can be set from any PC with modem via the optional PC software. CoCo PC aktiv Programmable controller Optional PC software for individual programming of digital, fail-safe and non-fail-safe functions of the boiler module and. With datalogger for logging set controller values, statistics and histories. PC Software Design variants Optional boiler chip card with works-programmed parameters, e.g. boiler capacity, purging time and temperature range. Simply plug onto the socket in the boiler module. Easy variant handling and product updates by exchange of the boiler chip card. Boiler Chip Card
6 K921 with Edition 02.04 Technical data and ains voltage: 230 V AC (-15/10%), 50 Hz. Fusing: 6.3 A. Enclosure: IP 40. Ambient temperature: 0 to 60 C. Dimensions (width height depth): 226 62 150 mm. Power reserve of the timer: 10 hours. Dot-matrix display: 132 64 pixels. Languages of the plain-text display: D, GB, F, NL, I, E (other languages available optionally). Certification and : EC type-tested and certified pursuant to Gas Appliances Directive (90/396/EEC) on the basis of EN 298, as per 2003 Low Voltage Directive (73/23/EEC) EC Directive (89/336/EEC) Detailed information on this product www.docuthek.com Contact www.kromschroeder.com Sales Elster GmbH Postfach 2809 49018 Osnabrück Strotheweg 1 49504 Lotte (Büren) Germany T 49 541 1214-0 F 49 541 1214-370 info@kromschroeder.com www.kromschroeder.com www.elster.com Kromschröder, a product brand of the Elster Group We reserve the right to make technical modifications in the interests of progress. Copyright 2007 Elster Group All rights reserved. 03250439 Druck.JJ 0.000