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INSTRUCTIONS
FOR CONTROLLER
GH21RA
FOR CENTRAL
HEATING BOILER
CONTROLLER
WITH FEEDER
SCREW
USER MANUAL
We strongly recommend that you familiarise yourself fully with the contents of this manual
before installing and using any of our devices. If you have any questions, please contact us
between 08:00 and 16:00
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Table of Contents
Summary of Contents for Geco GH21RA
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Page 1: User Manual
INSTRUCTIONS FOR CONTROLLER GH21RA FOR CENTRAL HEATING BOILER CONTROLLER WITH FEEDER SCREW USER MANUAL We strongly recommend that you familiarise yourself fully with the contents of this manual before installing and using any of our devices. If you have any questions, please contact us... -
Page 2: Table Of Contents
User Instructions for GECO GH21RA controller ______________________________________________________________________________ Table of contents DESCRIPTION OF CONTROLLER .......................... 3 TECHNICAL SPECIFICATIONS ..........................3 REQUIREMENTS FOR ELECTRICAL INSTALLATION ..................4 CONTROLLER MODES ............................6 5.1..............................7 TANDBY MODE 5.2..........................7 UTOMATIC MODE HEATING 5.3. -
Page 3: Description Of Controller
User Instructions for GECO GH21RA controller ______________________________________________________________________________ 1. Description of controller The GH21RA controller is assembled using microprocessor techniques utilising automatic surface mounting. This controller is a device used to control the process of preparing domestic hot water (the DHW circuit), and provides support for the main circuit (circuit CH). Parameters can be adapted according to the condition and the type of boiler. -
Page 4: Requirements For Electrical Installation
User Instructions for GECO GH21RA controller ______________________________________________________________________________ *When a contactor or relay proxy is connected, use a dedicated blowout system (eg varistor). Omission of this security measure may result in malfunction or damage to the controller output. 3. Requirements for electrical installation... - Page 5 User Instructions for GECO GH21RA controller ______________________________________________________________________________ Input parameters are described in the following tables: Description of controller inputs – temperature sensors Temperature sensor Type of input Controller designation Water flowing from 50-51 the boiler Water in the DHW 52-53 boiler/ Return temp.
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Page 6: Controller Modes
User Instructions for GECO GH21RA controller ______________________________________________________________________________ ONLY A QUALIFIED WIRING TECHNICIAN MAY CONNECT DEVICES TO THE GH21RA CONTROLLER. 5. Controller modes The controller can be operated in five modes: • Standby – returns the controller to the state before loss of power. The controller algorithm is not implemented, the clock operates in real time, and the chosen installation settings are stored. -
Page 7: Standby Mode
User Instructions for GECO GH21RA controller ______________________________________________________________________________ 5.1. Standby mode After the installation procedure described in the previous chapter, the GH21RA driver is turned on standby. In this mode, the screen displays a message about how to select automatic or manual mode. -
Page 8: Automatic Mode - Maintain
User Instructions for GECO GH21RA controller ______________________________________________________________________________ 5.3. Automatic mode - maintain The controller enters this mode if the temperature in the boiler reaches that set by the user in the parameters menu. The fuel feeder and fan are disabled, for the time set by the user in the ‘maintain time’... -
Page 9: Alarm/Note Mode
User Instructions for GECO GH21RA controller ______________________________________________________________________________ 5.5. Alarm/Note mode Alarm - The controller goes into alarm mode when one of the required sensors fails or is disconnected, or when the cable is broken. The controller will signal that the sensor in question is required. - Page 10 User Instructions for GECO GH21RA controller ______________________________________________________________________________ Button Description Function Turn on/off The main screen appears In the ‘boiler mode bar’, Manual Mode appears, or in the case of Automatic Change modes Mode, the display reads Heating, Switch between manual and automatic...
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Page 11: Operating The Controller - Main Screen
User Instructions for GECO GH21RA controller ______________________________________________________________________________ 6.2. Operating the controller – main screen When first connected to a power source, the controller turns on in standby mode. The function button is used to turn the controller on/off, and to move from standby to manual mode. -
Page 12: Help Button
User Instructions for GECO GH21RA controller ______________________________________________________________________________ At the bottom of every screen there is a text description of the item. Move between items on the screen using the buttons The curser shows the position on the screen. The current device is shown by the negation of the icon corresponding to the device. -
Page 13: Manual Mode
User Instructions for GECO GH21RA controller ______________________________________________________________________________ Basic information about the boiler and controller manufacturer is available: USING THE BUTTON FROM ALARM MODE TAKES YOU TO SERVICE INFORMATION. THE FOLLOWING IS DISPLAYED ON THE SCREEN: CONTROLLER MODEL, PROGRAMME NUMBER, AND TELEPHONE CONTACT DETAILS FOR THE MANUFACTURER OR TECHNICIAN. -
Page 14: Controller Menu - Graphic Tree
User Instructions for GECO GH21RA controller ______________________________________________________________________________ 6.6. Controller menu – Graphic tree MENU User settings Installation settings Operation record Control panel settings Boiler temperature Configuration layout Alarms and notes Language selection Temperature Boiler operating time Date and time Domestic Hot Water... -
Page 15: User Settings
User Instructions for GECO GH21RA controller ______________________________________________________________________________ 6.6.1 User settings Factory Description of user settings parameters settings Set boiler temperature 'S3' 'S4' 50°C Set DHW/returning temperature (optional) 40°C Fan speed Feeder working time Feeder stop time Maintain time 15min • Set boiler temperature – Temperature that the boiler will reach •... -
Page 16: Installation Settings
User Instructions for GECO GH21RA controller ______________________________________________________________________________ 6.6.2 Installation settings Factory Description of installation parameters settings System configurations: (1) - K1: Boiler + CH (2) - K2: Boiler + CH + DHW (3) - K3: Boiler + CH + Mixer... -
Page 17: Operation History
User Instructions for GECO GH21RA controller ______________________________________________________________________________ • Regulation option – Allows customisation of the system operation algorithm according to type of fuel and technical capabilities. A description of this function is in section 7. • Anti-stop function – Allows a security function for connected devices, which guards against system deterioration during the summer months. - Page 18 User Instructions for GECO GH21RA controller ______________________________________________________________________________ All new alerts appear on the operation history list alongside an envelope icon, indicating an ‘unread’ alert that needs the attention of the user or a service engineer. The envelope icon disappears when the alert has been read.
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Page 19: Control Panel Settings
User Instructions for GECO GH21RA controller ______________________________________________________________________________ Power supply outage – The screen shows the number of times that power to the controller has failed, displayed in number of incidences. 6.6.4 Control panel settings Settings for the controller, which do not effect heating system operations, can be found in the controller settings panel. -
Page 20: Description Of Additional Functions
7. Description of additional functions 7.1. DHW priority (hot water) The GH21RA controller can be set to pump hot water as a priority. If you select this mode, water heating becomes the primary function of the controller, with heating (CH) secondary. -
Page 21: Anti-Legionella Function
Legionnaires' disease, or legionellosis. Legionellosis has been officially recognised by the Ministry of Health as an infectious disease. The anti-legionella function performed by the GH21RA controller aims to ensure that the hot water tank is not a favourable environment for legionella bacteria. -
Page 22: Ga03Ha Room Panel
Disconnecting the room panel or damage to the cable connecting the panel to the controller turns off lights behind the icon on the screen of the GA03HA room panel. Follow these steps in order to connect the GH21RA controller to the GA03HA room panel: Step 1 Step 2... -
Page 23: Fuel Feeder Temperature Detection
Diagram for connecting the GA03HA room panel to the GH21RA controller 7.5. Fuel feeder temperature detection The GH21RA controller has the additional option to protect against temperature in the fuel feeder tray rising above the permitted level, preventing the flame from heating the fuel. -
Page 24: Boiler Extinguished Detection
7.8. Grate mode The GH21RA controller allows the heating regulation algorithm to be changed to ‘grate mode’, which does not support the feeder tray. It is usually used when the type of fuel is being changed, for example to wood or green waste paper. -
Page 25: Pump Only Mode
– GH21NA. 7.9. Pump only mode The GH21RA controller allows the heating regulation algorithm to be changed to ‘pump only’ mode. In this mode, neither the feeder nor the fan are supported. It is usually used when the type of fuel is being changed, for example to wood or any other combustible eco-fuel without fan support. -
Page 26: System Installation
User Instructions for GECO GH21RA controller ______________________________________________________________________________ 8. System installation 8.1 Heating installation number 1 The following list specifies the parameters available to the user, along with the assignment of outputs for attached devices and inputs for temperature sensors. Diagram 1 - Summary of user parameters... -
Page 27: Heating Installation Number 2
User Instructions for GECO GH21RA controller ______________________________________________________________________________ 8.2 Heating installation number 2 The following list specifies the parameters available to the user, along with the assignment of outputs for attached devices and inputs for temperature sensors. Diagram 2 – summary of user parameters... -
Page 28: Heating Installation Number 3
User Instructions for GECO GH21RA controller ______________________________________________________________________________ 8.3 Heating installation number 3 The following list specifies the parameters available to the user, along with the assignment of outputs for attached devices and inputs for temperature sensors. Diagram 3 – Summary of user parameters... -
Page 29: Controller Algorithms For Attached Devices
User Instructions for GECO GH21RA controller ______________________________________________________________________________ 9. Controller algorithms for attached devices 9.1 Heating mode – Fuel feeder In automatic heating mode with the standard setting, the fuel feeder operates according to the parameters set in ‘fuel feeder operation time’ and ‘fuel feeder interval time’. When the fuel feeder is switched on and operating, this is indicated by a feeder icon in the negated backlit position in system operation preview. -
Page 30: Automatic Mode - Dhw/Mixer Pump
User Instructions for GECO GH21RA controller ______________________________________________________________________________ 9.4 Automatic mode – DHW/Mixer pump The DHW pump is activated when the temperature of water from the boiler is higher than C and higher than the temperature of the water in the boiler (so as not to cool the water in the boiler), and lower than the temperature set by the user in the parameter ‘set DHW... -
Page 31: Alarms
User Instructions for GECO GH21RA controller ______________________________________________________________________________ 10. Alarms The controller has 11 alarms, including eight which will stop the controller for safety reasons and three that are warnings. For each alarm or notes, the number is displayed, along with text information describing the problem, and an audible alarm will sound. When multiple alarms occur, the details are displayed cyclically. - Page 32 User Instructions for GECO GH21RA controller ______________________________________________________________________________ Alarm 1 – Blown fuse/temperature limiter tripped This alarm occurs when the controller detects a zero signal from the power supply for two seconds. This may be caused by a blown fuse or tripped temperature limiter.
- Page 33 User Instructions for GECO GH21RA controller ______________________________________________________________________________ Alarm 3 - Damage to fuel feeder temperature sensor The user can force safe mode when the fuel feeder temperature sensor is damaged. Safe mode operation will continue until the controller is turned off, or the power is cut. After one of these events the controller returns to manual or automatic mode, determines that the sensor is faulty, and stores this as an alarm, so the operator must force safe mode again.
- Page 34 User Instructions for GECO GH21RA controller ______________________________________________________________________________ When parameter 'S49' = 1, note UW4 occurs, then the controller switches to safe mode and the boiler operates without the DHW/returning water temperature sensor. Operating in safe mode without a working DHW sensor reduces the boiler temperature to 65°...
- Page 35 User Instructions for GECO GH21RA controller ______________________________________________________________________________ Note 10 - Anti-legionella function not executed This note occurs only when the heating system is configured with an additional DHW pump and when the Anti-legionella function is activated. The warning occurs when the temperature in the boiler does not reach 70°C within 120 minutes of activation of the function.
- Page 36 User Instructions for GECO GH21RA controller ______________________________________________________________________________ Alarm 12 - Overheating boiler This alarm occurs when the temperature of water coming from the boiler exceeds that set in parameter - 'S17' [°C]. If the temperature of water from the boiler drops to four degrees below that set in’S17’, the controller returns to work in manual or automatic mode, depending on how it was operating before alarm AL12 was activated.
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Page 37: Emergency Work
User Instructions for GECO GH21RA controller ______________________________________________________________________________ 11. Emergency work Safe mode allows the boiler to work in case of damage to the feeder and or fan TRIAC, until servicing is possible. In order for the controller to operate the feeder/fan in safe mode, the appropriate mode must be chosen from the controller menu for the feeder/fan to be connected to the control module. -
Page 38: Temperature Limiter (Stb)
User Instructions for GECO GH21RA controller ______________________________________________________________________________ Devices may only be connected to the GH21RA controller by a qualified wiring technician During safe mode it is not possible to regulate the speed of the fan 12. Temperature limiter (STB). Regulator The GH21RA controller is equipped with an independently operating, automatic safety device called a temperature limiter (STB). -
Page 39: Loss Of Power
The GH21RA controller is fully compatible with the GECO GA03HA room panel, allowing the boiler to be operated from the comfort of your home. When the GH21RA controller is connected to the GA03HA room panel, it is possible to: • Change the set boiler temperature •... - Page 40 GA03HA room panel screen, and shows that the function has been disabled, in the system operations preview. In order to connect the GH21RA controller to the GA03HA room panel: Step 1 Step 2 Step 3...
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Page 41: In Case Of Damage To The Controller
______________________________________________________________________________ 15. In case of damage to the controller If the controller malfunctions, contact the supplier/manufacturer of the boiler, or GECO, for technical advice. If the controller needs to be repaired or serviced, remove it completely from the boiler and send it along with its housing to the specified address. - Page 42 User Instructions for GECO GH21RA controller ______________________________________________________________________________ Step 3 Remove the housing cover using a flathead screwdriver Step 4 Disconnect the wires from the terminals, remove the cables from the sheaths, loosen the cable clamp strip and remove all cables from the outside of the controller.
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Page 43: Information Regarding The Labeling And Disposal Of Waste Electronic And Electrical Equipment
User Instructions for GECO GH21RA controller ______________________________________________________________________________ 16. Information regarding the labeling and disposal of waste electronic and electrical equipment Warning! This symbol on the product or on its packaging indicates separate collection of waste electrical and electronic equipment. This means that the product should not be disposed of with other household waste. - Page 44 P.P.U.H. „Geco” Sp. z o. o. 32-060 Liszki, Poland Cholerzyn 376 tel. 012 6369811, 6361290 fax. 012 6362002 http://www.geco.pl...
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