Quickheat 30 weather compensated boiler control
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1 Quickheat 0 weather compensated boiler control A compact and sophisticated heating controller The compact KM controller is designed for the control of fan assisted boilers with modulating burners. The controller is housed in a standard DIN aperture in the Quickheat 0 boiler casing. The KM controller does not have timing facilities. All timing of the heating system takes place at the programmable thermostat for space heating and at the Multizoner I for cylinder hot water heating and for the bronze pump and towel rails. Main Features The controller KM has the following main features for the complete and safe operation of the boilers: modulating burner control weather compensation for the heating circuits DHW (Domestic Hot Water) control with hot water priority boiler monitoring heating monitoring Identifiable connection plugs for error-free connections. All the electronic components of the controller are in the one compact unit.,(& Quality The electronic system meets the following basic requirements: European Gas Directive 90/9/EWG European Low-voltage Directive 7//EWG European Electromagnetic Compatibility Directive 89//EWG European Automatic Burner Control Standard EN 98 Simple interface There are only two control keys and one LCD display on the controller. The selection knob. The confirmation button. The LCD-Display for temperature of input signals from sensors and output signals to devices. Fault diagnosis. Setting of boiler parameters Diagnostic features All heating control and burner operation can be fully diagnosed. Parameters can be changed at the unit, e.g.: individual adjustments short initialisation fast error check
2 Expansion facilities The controller has a two-cable bus for connecting to other controllers for extra functions. BM Operation-control module. E Heating programmer. KKM Multiple boiler control management. Controller access cover The access cover position determines the accessibility level The indication will return to normal mode once the cover is closed :88 Cover closed Five modes can be selected with the control knob in the closed cover position. The mode selected is indicated by the horizontal symbols on the LCD-Display. The boiler temperature shows as two digit on the right hand side of the LCD Display. Day (On) mode Heating circuit shows Sun symbol Set back mode Heating circuit shows Moon symbol Boiler working Flashing Sun symbol Fault Indication If a fault occurs the burner will be switched off. The Symbol of a triangle shows on the display, with the fault code given on the left hand segment of the display. Cover must be open to reset the boiler by pressing the button with the red LED light flashing above it. It is not possible to reset the unit in the Standby (Off) Mode. Additional symbols giving further information are shown on the LCD-Display when the cover is opened. For example further faults may be displayed at this stage.,(& Inputs from sensors Inputs are displayed on the left hand of the LCD-Display. A black arrow shows an active status of an input. Several inputs may be active. These are: Flame signal Gas pressure Air pressure Room thermostat Remote control Outputs to boiler pumps and valves Outputs are displayed on the right hand of the LCD-Display. A black arrow shows an active status of an output. Several outputs may be active. These are: Gas valves V and V Ignition Fan Heating pump DHW pump / valve LCD screen display summary Function Labels under display Adjustment Min. Max. Preset Boiler N/A DHW Yes C Room Yes C Setback Yes 0 0 C
3 Outside N/A Flue N/A 7 Compensation Yes UFH. Rads 8 Boiler high limit Yes 90 UFH 9 Boiler N/A 0% 00% 00% 0 Factory parameters No 0 0 Emergency mode There is an emergency mode for some errors. Outside or boiler sensor faults resultsin main functions being switched off. The fault is displayed and the emergency mode is started. Program Course Indication Burner If the cover is open, the burner ignition and shut down sequence can be observed on the left of the LCD- Display. Different figures are shown for each step. Info-Menu All measurements like temperature and burner capacity are indicated and the desired set points can be changed. Menu Selection Below the LCD Display there 0 menus which can selected by the control knob.. Selection is shown by the adjacent black arrow and relevant values appear on the screen. Setting of Parameters The values can be changed by pressing the button once and then the control knob. The red LED is illuminated and the value of the parameter is shown as a two digit figure. The new figure is saved, when the button is pressed once again. Alteration is only possible within a set min. and max. value. If the new value is not confirmed within 0 seconds or the cover is closed too early, the new value is ignored and reverts to its old value. Some values cannot be changed. ST ST,(& KM X-XXXX ST ST8 ST ST ST ST9 ST 7 ST7 FUSE * ST0 ST ST ST ST8 F The terminals at the back of KM controller
4 Terminal summary Ref. No. Voltage Description State Connection ST 0 V AC Relay for programmable thermostat C / NO ST V DC Outside sensor NTC - / NTC + ST V DC Flue gas sensor NTC - / NTC + ST V DC Boiler sensor NTC +/ NTC- ST V DC DHW sensor NTC - / NTC + ST V DC Special modulating boiler pump ST7 0 V DC Special V DC heating fan ST8 0 V DC Connection to other controllers BUS+ BUS- ST9 V AC Air pressure switch Gas pressure switch Gas valve connections C NO C NO Ref. V ST0 0 V AC Room thermostat N / L,(& OP PWM-Pump Max. V DC VCC+ PWM Sensor Gnd 0 V DC ST 0 V AC DHW pump or / way valve N / L ST 0 V AC OP 7 - Ionisation Ignition N / L N / L ST 0 V AC OP8 - As above ST V DC Optional analogue sensor - Low water pressure 8 V DC ST8 V AC Flow switch NO / C ST 0 V DC BUS supply jumper ST-PE Fault finding and rectification No. Fault Check Rectify Boiler Lockout. Overheating above high limit. Let boiler cool and then reset. No Gas Not enough gas pressure before burner starts. Check gas supply. Boiler reset automatically. Low gas pressure Not enough gas pressure after burner starts. Check gas supply. Boiler reset automatically. No flame signal Flame extinguished Check gas valve & igniter. Replace if Flame goes out Check if flame goes out during stabilisation period. Check gas valve & flame probe. Boiler overheat Boiler temp. is higher than limit temp. Wait until temp. drops. Boiler resets automatically. 7 Flue overheat Flue temp. higher than the Check flue is clear & reset. safety limit temp. Flame signal on Burner has not fired. Check wiring & controller operation. Reset. Boiler sensor failure Faulty boiler sensor Check wiring. Replace if Flue sensor failure Faulty flue sensor Check wiring. Replace if DHW sensor failure Faulty DHW sensor Boiler works in emergency mode. Check wiring & sensor in position. Replace if
5 Outside sensor failure Faulty outside sensor. Boiler operates in emergency mode. 0 Gas valve circuit V Although V is closed, a flame signal is detected. Gas valve circuit V Although V is closed, a flame signal is detected. Lack of air Air pressure switch is not operating. Failure of air pressure switch Faulty air pressure switch & in on position. Pre-purge failure Fan does not reach prepurge speed. Ignition failure Fan does not reach speed for ignition to take place.,(& Check wiring. Replace faulty sensor & reset. Check gas valve connections. Replace if Check gas valve connections. Replace if Check connections. Replace switch if faulty & reset. Check connections. Replace switch if faulty & reset. Check wiring from controller to fan. Replace circuit board of fan if Check wires to igniter. Replace fan circuit board if faulty. Check & replace fan circuit board if faulty. Reset boiler parameters. Fan continues to run Fan does not stop under check. 0 CRC boiler failure Boiler parameters are not valid. CRC burner failure Burner parameters are not Reset boiler parameters. valid. Power supply failure No power to the unit. Check fuse on the back of the controller & replace if necessary. 0 Water pressure failure Check if water pressure is too low. 99 Controller self-test failure Check system code 0, showing on the right side of the display. Check water pressure switch & its connections. Replace if faulty. Contact heating engineer for checking & resetting codes. Communications with other controllers The KM controller can communicate with other control systems. This is done via a two-wire bus system with the following features: Data transfer to and from the boiler module via SCOM protocol. Data: temperature, operation status, release, trouble shooting etc. Connection: wires (pair of wires) Length of cable: up to 00m. Voltage: Safe low voltage (SELV) Automatic recognition of connected accessories Integrated remote control operation for the BME unit Multiple boiler connections Remote Control Operation If a remote unit is connected via the two cable bus the following functions can be remotely adjusted: Set values and limits for the CH circuit Set values and limits for the DHW circuit Set values and limits for multiple boilers the mode selector of the KM has to be adjusted. The set values and limits of remote control have priority.
6 The KM internal set values are not operational. Other Control Systems, connected via the two cable bus system, are automatically recognised. The presence of the remote control is displayed on the KM unit by an arrow on the left hand below the symbol bus communication (cover open). If the remote control is interrupted, the system switches automatically to the internal desired temperature values after minutes. The KM overrides the adjusted modes of the remote control. Therefore the KM has to be in automatic mode. Optional BME remote unit An BME remote unit can be connected to the two wire bus. All important functions for CH and DHW operation can be controlled directly from the living space area. The remote control unit shows the important states of the CH system. Therefore the BME calculates the limits and desired values for the CH circuit and transfers this information back to the KM. These values assume priority over the internal values of the KM. Connection The connection is provided via a plug connector to the back of the KM. The communication connection is standard Western Plug (FCC-8-Plug realised in /). The pin connection of the bus connector external control accessories is identical to the pinning of the KM (the data transfer is realised via the pins BUS- and BUS+). This connection provides both data transfer and power supply of the BME remote unit. For safety and to avoid interference do not lay the two wire bus in the same conduit of other 0 V AC power supply cables. The requirements of the European low voltage directive regarding low voltage protection (SELV) must be followed. No free cables of the 0 VAC line can be used The input of the room thermostat has to be shorted. The line resistance has to be Ohm maximum. The max. distance for the two cable line is 00m. Bus Addresses for Boiler Cascades Up to 8 boilers can be cascaded (sequenced) by the boiler cascade manager KKM. The two cable bus connection of the boiler modules have to be combined parallel. For identification of the individual boilers the boiler modules are addressed from to 8. The addressing is done by an engineer. KM address 0 (factory setting) is planned for operation without cascades. In a rising order starting with KM address no. (i.e.,,) Each address has to be set once only From the rd boiler module onwards the internal bus power has to be switched off. This can be done with a,mm plug connector positioned directly beside the bus connector on the back of the unit. By parallel wiring while observing the polarity (+ on +, - on -),(&
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