Operation Manual. Control TJ-HRC

Transcription

1 Operation Manual Control TJ-HRC for NET Heat Exchangers TJ-HRC

2 Subject to changes in design and scope of delivery as well as further technical developments. Original operation manual, Neue Energie-Technik GmbH TJ-HRC-0218

3 Table of Contents Operation Manual TJ-HRC 1 IMPORTANT BASIC INFORMATION SCOPE OF DELIVERY RESPONSIBILITIES Responsibilities of the Manufacturer Responsibilities of the Operator STANDARDS AND GUIDELINES DOCUMENTATION Further Applicable Documents Presentation Conventions MANUFACTURER SAFETY BEHAVIOUR IN CASE OF EMERGENCY INTENDED USE Range of Use Safety Regulations Maintenance SAFETY LABELS ON THE DEVICE SAFETY TEMPERATURE LIMITER TECHNICAL DATA FUNCTION SPEED CONTROL VERSION VAPOUR CONDENSER VERSION MIXER CONTROL VERSION UNPACKING SAFETY INSTALLATION AND INITIAL OPERATION SAFETY INSTALLATION Dimensions of the base plate Electrical connection INSTALLATION SITE INITIAL OPERATION Control Panel/Functions Basic Settings Minimum Temperature at Inlet Flow Target Temperature Flue Gas Heat Exchanger Bypass at Flue Gas Heat Exchanger Warning Messages Alarm Function HYDRAULIC SYSTEMS / WIRING DIAGRAMS TJ-HRC 100 Flue Gas Heat Exchanger TJ-HRC 100 Vapour Condenser TJ-HRC 100M TJ-HRC 100SK TJ-HRC 100MSK TJ-HRC 200 Flue Gas TJ-HRC 200 Vapour Condenser TJ-HRC 200M TJ-HRC 200SK TJ-HRC200MSK FAILURE ANALYSIS TJ-HRC

4 8 APPENDIX TJ-HRC-0218

5 1 Important Basic Information 1.1 Scope of Delivery This operation manual describes the NET Control TJ-HRC-xx. Please read this operation manual before starting up the control unit or the NET heat exchanger. The scope of delivery includes the following: Operation manual Control TJ-HRC-xx Sensor package 1.2 Responsibilities Responsibilities of the Manufacturer The NET Control TJ-HRC is built with technology that is state of the art at the time of production. If it is operated in accordance with this operation manual the required safety is guaranteed Responsibilities of the Operator Please follow the effective regulations for safety, accident prevention and environmental protection concerning the range of operation of a flue gas heat exchanger. The following things need to be considered during the entire product lifetime. This list is not exhaustive: The operator must make sure that this operation manual is available during the entire product life cycle of the NET Control TJ-HRC. The operator must make sure that the ambient conditions that are described in this operation manual and specified in the data sheet are maintained throughout the entire operating time. The operator must regularly verify the functional capability and completeness of all safety devices. The operator must set maintenance intervals that are adjusted to the individual operational environment and must ensure that these maintenance intervals are observed. The operator must make sure that the NET Control TJ-HRC is only used in technologically perfect condition. In case of any functional limitations or defects, the NET Control TJ-HRC must be shut down temporarily and safeguarded against accidental restarting. The operator must not change or modify the NET Control TJ-HRC in any way, otherwise the liability of the manufacturer expires. The operator is responsible for following the local environmental, safety and fire protection regulations. The operator is responsible for making sure that the NET Control TJ-HRC is only accessible to specialised craftsmen that are trained in the appropriate field. The hazard zone must be protected against unauthorized access and, if necessary, marked with an entry restriction. The NET Control TJ-HRC must only be installed by qualified experts. TJ-HRC

6 1.3 Standards and Guidelines The following standards and guidelines must be adhered to when installing and operating the NET heat exchanger: DIN VDE 0100 with regulations for planning, constructing and testing electric systems for residential buildings, commercial plants and public buildings. DIN EN Safety-related equipment of heat generation plants (formerly DIN 4751) DIN EN Contracting rules for award of public works Part C: General technical contract conditions for construction work This list is not exhaustive. 1.4 Documentation This operation manual is aimed at craftsmen that have the required know-how for assembling and installing the NET Control TJ-HRC based on training and experience in the appropriate field, as well as experts that have been trained in operating the NET Control TJ-HRC Further Applicable Documents The scope of delivery of the NET Control TJ-HRC includes a corresponding document of the manufacturer. This describes, if included, the actuator of the bypass damper, the motor valve with actuator and the safety temperature limiter. 6 TJ-HRC-0218

7 1.4.2 Presentation Conventions Designation for Warning Notices Designation for a hazard that will cause death or severe injury if it is not avoided. Danger Designation for a hazard that may cause death or severe injury if it is not avoided. Warning Designation for a hazard that may cause minor injuries if it is not avoided. Attention Designation for a hazard that may cause property damage if it is not avoided. Note Types of text In this operation manual, the following designations are used for certain types of texts: Listings This is a dummy text for a listing Instructions 1. This is a dummy text for instructions References Cross references to other chapters of the operation manual are depicted as follows: Chapter 6.1 Safety on page Manufacturer Neue Energie-Technik GmbH Frauenstr. 32 Phone +49 (0) Maisach, Germany Fax +49 (0) TJ-HRC

8 2 Safety 2.1 Behaviour in Case of Emergency In case of emergency immediately take the following actions: Disconnect NET Control TJ-HRC from power. Switch off NET heat exchanger and firing system Allow NET heat exchanger and firing system to cool Disconnect NET heat exchanger and firing system from power. Get an expert to check the NET Control TJ-HRC, NET heat exchanger and firing system After an emergency shutdown, the NET Control TJ-HRC and the NET heat exchanger must not be restarted until the entire system has cooled down to below 100 C. Otherwise there is a risk of steam hammers that can destroy the NET heat exchanger. 2.2 Intended Use Range of Use The NET Control TJ-HRC is used to regulate a NET heat exchanger system for recovering waste heat that is generated during production processes. The NET heat exchanger transfers this heat to a carrier medium (e.g. heating water). The NET Control TJ-HRC is used to regulate a NET heat exchanger system. The NET Control TJ-HRC is designed for the type of heat recovery that is specified in the technical data. Using the device in a different way is not permissible and is not covered by the manufacturer s responsibilities. 8 TJ-HRC-0218

9 2.2.2 Safety Regulations This manual is aimed exclusively at authorized experts. All mounting and wiring work on the control unit must only be conducted while the device is disconnected from the mains. The device must only be opened, connected and started-up by trained personnel. Please follow all local safety regulations when doing this. The device is state-of-the-art technology and fulfils all necessary safety regulations. It must only be used in accordance with the technical data and the following safety regulations and laws. When using the devices, please also follow the legal and safety regulations that relate to the specific application. Abnormal handling leads to the exclusion from any liability claims. Please also note the following points: The device must only be installed in dry interior rooms. Based on the local regulations, it must be possible to disconnect the control unit from the mains with an all-pole separator (plug/socket or 2-pole disconnecting switch). Before starting installation or wiring work on any equipment, the control unit must be completely disconnected from the mains and secured against restarting. Never swap the connections of the safety extra-low voltage (sensor connections) with the 230V connections. This may cause severe damage and life-threatening voltage at the device and the connected sensors. NET heat exchanger systems can heat up considerably. Therefore, there is a risk of burns. Be careful when installing the temperature sensors! For safety reasons, the system must only stay in manual mode for testing purposes. In this operation mode, maximum temperatures and sensor functions are not being monitored. A safe operation is no longer possible if the control unit or connected equipment is visually damaged, does not work anymore or has been stored in inappropriate conditions. In this case, the control unit and the equipment must be turned off and secured against accidental operation. TJ-HRC

10 2.2.3 Maintenance If the device is handled and used appropriately, maintenance is not required. For cleaning, only use a cloth that is moistened with gentle alcohol (e.g. ethanol). Strong detergents and solvents such as chloroethene or tri must not be used. 2.3 Safety Labels on the Device The labels on the NET Control TJ-HRC display important technical information. The labels must not be removed. If a label has become illegible or has come loose, this label must be replaced with a new one. Replacement labels may be ordered from the manufacturer. Figure 1: Technical Data on the NET Control TJ-HRC 2.4 Safety Temperature Limiter If the NET heat exchanger overheats it is necessary, per DIN EN 12828, to ensure that there is no danger due to evaporation. This is achieved with a safety temperature limiter. In addition, for maintaining the operational safety of the heat recovery system. We recommend the use of a temperature guard that opens the bypass via spring return during zero-current operation. Safety temperature limiters and temperature guards must be positioned in such a way that they are not influenced by the system s radiant heat. It is recommended that the live parts associated with the heat recovery system be wired so that the actuator of the heat exchanger opens only when the controller, chimney fan, STL, and TG are released. 10 TJ-HRC-0218

11 3 Technical Data TJ-HRC

12 Temperature Sensor The temperature sensor is a temperature-dependent resistance (posistor or PTC) with a resistance of 1000 Ohm at 0 C. Item No Type Temperature range C Sensor Tolerance Connection technology KWT cable resistance thermometer KF 1xPT1000 Class B Two-wire system Material W Pipe ø Nominal length Special features Cable length Connection line (single teflon and joint teflon insulated) Connection 3.2 mm 100 mm Anti-kink spring, waterproof 2000 / 100 / 6 mm 2 x 0.22 mm² Ferrule, colour blue Temperature sensors must only be used in the thermowell on the heat exchanger and storage that is intended for this purpose. Contact sensors should not be used due to their slow response behaviour. Minimum cross-sections of the extension cable for the temperature sensors (Pt1000), depending on line length: up to 50 m 0.75 mm² up to 150 m 1.5 mm² above 150 m 2.5 mm² T [ C] R [Ohm] TJ-HRC-0218

13 4 Function 4.1 Speed Control Version The main aspect of this version is the regulation of the load circuit via a speed-controlled pump. This control unit is best used for heat exchangers of type Thermojekt R/RB. The charge pump is switched on via a potential-free relay from an adjustable minimum temperature of 60 C (ex works) on the supply line. Similarly, a minimum difference to the storage tank temperature at the return tank of 6K must be reached in order to ensure efficient heat recovery. The control regulates the temperature at the supply line (HE flow line) to an adjustable target temperature. This is achieved by adjusting the speed of the charge pump. A constant inlet flow temperature of the heat carrier (water) is required for an optimal temperature layering inside the storage tank. The target temperature depends on the lower temperature of the storage tank. Below 75 C the target temperature is 80 C, otherwise 85 C. If the temperature is too low at the inlet flow, the control reduces the pump output in relation to the deviation. This reduces the speed of the heat carrier inside the heat exchanger. As a result, the heat carrier is heated up more. If the temperature at the inlet flow is too high, the control increases the pump output in relation to the deviation until the temperature is again equal to the set target temperature. The heat recovery at the heat exchanger continues until the storage has reached its maximum temperature at the return flow. If this temperature is exceeded, the control switches the flue gas heat exchanger to bypass mode. The bypass is also turned on if the temperature at the inlet flow of the heat exchanger exceeds a set value. Please note that in the case of customary high-efficiency pumps with 0-10V control input, the pump is switched off at 110 C to protect the pump. This pump protection is not switched off until the temperature falls to 90 C. Since high-efficiency pumps are switched off automatically it is absolutely necessary to make sure that the pump is installed in the cold return flow from the buffer storage towards the heat exchanger and not in the inlet flow behind the heat exchanger. The control turns off the pump due to high temperature at 105 C at the return flow (S9), or 110 C at the inlet flow (S1), respectively,in order to avoid vapour shocks in the heat exchanger or in the water pipes. TJ-HRC

14 4.2 Vapour Condenser Version The main aspect of this version is the regulation of the load circuit via a charge pump. This control unit is best used for heat exchangers of type Thermojekt SK. The charge pump is switched on via a potential-free relay from an adjustable minimum temperature of 30 C (ex works) on the supply line. Similarly, a minimum difference to the storage tank temperature at the return tank of 6K must be reached in order to ensure efficient heat recovery. The control regulates the temperature at the supply line (VC flow line) to an adjustable target temperature. This is achieved by adjusting the speed of the charge pump. A constant inlet flow temperature of the heat carrier (water) is required for an optimal temperature layering inside the storage tank. The target temperature depends on the lower temperature of the storage tank. Below 45 C the target temperature is 57 C, otherwise 62 C. If the temperature is too low at the inlet flow, the control reduces the pump output in relation to the deviation. This reduces the speed of the heat carrier inside the heat exchanger. As a result, the heat carrier is heated up more. If the temperature at the inlet flow is too high, the control increases the pump output in relation to the deviation until the temperature is again equal to the set target temperature. Please note that in the case of customary high-efficiency pumps with 0-10V control input, the pump is switched off at 110 C to protect the pump. This pump protection is not switched off until the temperature falls to 90 C. Since high-efficiency pumps are switched off automatically it is absolutely necessary to make sure that the pump is installed in the cold return flow from the buffer storage towards the heat exchanger and not in the inlet flow behind the heat exchanger. The control turns off the pump due to high temperature at 105 C at the return flow (S9), or 110 C at the inlet flow (S1), respectively,in order to avoid vapour shocks in the heat exchanger or in the water pipes. 14 TJ-HRC-0218

15 4.3 Mixer Control Version The main aspect of this version is the regulation of the load circuit via a 3-way valve with actuator and control input for 0-10V. The control unit ensures that a settable target temperature is maintained at the inlet flow to the flue gas heat exchanger (HE flow line). This is achieved with a constantly controlled 3- way valve. The charge pump is set to a fixed speed and maintains a steady volume flow in the heat exchanger circuit. This ensures a steady and optimal flow in the heat exchanger. A consistent inlet flow temperature of the heat carrier (water) is required for an optimal temperature layering inside the storage. The charge pump is only switched on when a minimum temperature at the inlet flow is reached. Likewise, a minimum difference to the storage temperature at the storage return flow must be reached to ensure an efficient heat recovery. If the temperature at the inlet flow is too low, the control unit recognises that the heat carrier in the heat exchanger does not heat up sufficiently and closes the 3-way valve. This increases the input temperature of the heat carrier at the heat exchanger and therefore the outlet temperature. If the temperature at the inlet flow is too high, the control unit opens the 3-way valve. Then, more water can be directed from the buffer storage to the heat exchanger in order to cool the heat exchanger. The 3-way valve stays open until the temperature is once again equal to the target temperature. The heat recovery at the heat exchanger continues until the storage has reached its maximum temperature at the return flow. If this temperature is exceeded, the control switches the flue gas heat exchanger to bypass mode. This reduces the heat recovery to a small fraction of the nominal output. Please note that in the case of customary high-efficiency pumps with 0-10V control input, the pump is switched off at 110 C to protect the pump. This pump protection is not switched off until the temperature falls to 90 C. Since high-efficiency pumps are switched off automatically it is absolutely necessary to make sure that the pump is installed in the cold return flow from the buffer storage towards the heat exchanger and not in the inlet flow behind the heat exchanger. The control turns off the pump due to high temperature at 105 C at the return flow (S9), or 110 C at the inlet flow (S1), respectively, in order to avoid vapour shocks in the heat exchanger or in the water pipes. TJ-HRC

16 5 Unpacking 5.1 Safety Check the components for any damage that may have been caused during transport. In case of complaints, please contact the transport company immediately and inform the manufacturer about the damage. Damaged devices must not be installed without consultation. 6 Installation and Initial Operation 6.1 Safety According to DIN EN for water-heating systems safety-related equipment it must be ensured that there is no danger caused by inadmissibly high temperatures or pressure inside the heating system. This means that various safety measures are necessary in connection with the characteristics of a flue gas heat exchanger. For example, this may include the following: Acoustic alarm device to give a warning in case of dangerous malfunctions Safety temperature limiter at the NET heat exchanger Temperature monitor at the NET heat exchanger Twin pump inside water circuit or a standby pump that activates automatically if the main pump is not operating Emergency cooling Low-water indicator Automatic ventilation of water circuit This list is merely intended as a reference for planning and is not exhaustive. 16 TJ-HRC-0218

17 6.2 Installation To open the console, the control device has to be separated from the console as follows.use two large screwdrivers to press down the snap-fits (marked in the illustration above) and lift the device out of the console with the screwdrivers. After removing the control device, use a small screwdriver to press the lock (marked in the illustration above) to unlock the console lid and turn it up and back to remove it. Using the included installation material, the console should be mounted on the wall at eye level with the cable outlets facing downwards. TJ-HRC

18 6.2.1 Dimensions of the base plate Illustration: Drill template on base of NET Control TJ-HRC 18 TJ-HRC-0218

19 6.2.2 Electrical connection Each controller is supplied with a guide containing the terminal markings, which is clamped between the low voltage and 230 V terminals. After completion of the electrical connection, this guide can either be retained inside the controller or removed. Illustration: View with the inserted nameplate TJ-HRC

20 20 TJ-HRC-0218

21 TJ-HRC

22 6.3 Installation Site The location of the control unit NET-TJ-HRC must comply with VDE 0100 guidelines. 6.4 Initial Operation Control Panel/Functions Control keys, display and scroll wheel: The scroll wheel is used to select the individual items on the menu (e.g. version, user, etc.). The arrow that points to the left shows the current position of the cursor. The arrows that point up or down on the far right of the display indicate that further lines of the menu can be selected with the scroll wheel above or below the visible display area. Press the scroll wheel to select a menu item for displaying or changing a value (also for activating manual operation). The two fields on the bottom of the display (BACK) show the current function of the two control keys below the display. 22 TJ-HRC-0218

23 6.4.2 Basic Settings Below are the basic settings for the control based on our recommendations. These ensure an optimal operation of a flue gas heat exchanger or a vapour heat exchanger. Do not change any of the parameters without consulting NET (see Point ). The basic settings of the control TJ-HRC are optimized and attuned to the various NET heat exchangers and their applications. (see following table) Minimum Temperature at Inlet Flow Minimum temperature at the inlet flow of the flue gas heat exchanger (S1) 1. Switch-on: above 60 C Switch-off: below 57 C 2. Switch on: temperature difference of return flow storage flue gas heat exchanger (S9) above 6 K Switch off: temperature difference of return flow storage flue gas heat exchanger (S9) below 3 K Vapour Condenser: 1. Switch on: temperature difference of return flow storage vapour condenser (S9) above 6 K 2. Switch off: temperature difference of return flow storage vapour condenser (S9) below 3 K Target Temperature Flue Gas Heat Exchanger The target or nominal temperature at the sensor or the input S1 is set to 80 C. In expert mode, this nominal temperature can be changed as follows: Press service button Scroll to Functions Confirm by pressing scroll wheel Scroll to PID control-par? Confirm by pressing scroll wheel Scroll to T.abs.SET Confirm by pressing scroll wheel Scroll to select desired value (not above 95 C) Confirm by pressing scroll wheel BACK BACK Menu The expert mode can only be accessed with a PIN that can be requested from NET after clarifying the technical situation on the phone. TJ-HRC

24 Bypass at Flue Gas Heat Exchanger Once the maximum temperature is reached in the storage at the return flow towards the flue gas heat exchanger or in the inlet flow of the flue gas heat exchanger, one or more bypass dampers in the flue gas heat exchanger are adjusted to direct hot flue gases past the register. This circumvents or greatly reduces the heat recovery. Connection: The actuator of the bypass damper(s) (actuatorbd) in the heat exchanger is controlled via a switch relay (e.g. A1) with 230 V AC. Siemens actuators, type GMA 32 1, are connected according to the following diagram: Switching positions Actuator BD on Heat recovery on Voltage at switch relay Bypass closed Actuator BD off Heat recovery on No voltage at relay Bypass open Switching temperatures: The flue gas heat exchanger is switched to bypass mode in two situations (actuatorbd auto/off): The bypass is opened if: 1. the storage is fully loaded and the temperature in the return flow from the storage to the flue gas heat exchanger rises above 90 C. (Bypass closed if the lower temperature in the storage falls below 85 C for 30 s) 2. the inlet flow temperature of the flue gas heat exchanger rises above 95 C. Overheat control of heat exchanger. Bypass closed if the inlet flow temperature of the flue gas heat exchanger is below 90 C. The actuator of the bypass damper(s) (actuatorbd) in the heat exchanger is controlled via a switch relay with 230 V AC. If the bypass actuator is activated, the bypass is closed for as long as there is voltage. When the voltage drops off, the integrated spring return motor automatically opens the bypass. This serves as a safety position in case of a blackout. The bypass is always open when there is no voltage (safety position). 24 TJ-HRC-0218

25 Warning Messages If the temperature of the flue gas heat exchanger or storage rises to a critical level, the control switches to alarm mode. The control emits an alarm signal while the control unit continues to function as described above. Additionally, the alarm relay A5 drops out. The clearly visible and audible alarm transmitter installed on site gives an additional signal. Once the temperature level drops below the set nominal value, the alarm relay is switched on again. All maintenance work is displayed in the menu under function overview. The acoustic signal of the control can be switched off here by selecting warning tone off. It is necessary to manually confirm or delete the warning even if the heat recovery is back in order! This ensures that irregularities in the system do not go unnoticed. You should record the type and time of the error and then select delete message. Please contact us if errors occur repeatedly. The following warning messages may be displayed: 1. T.Storage Temperature in return flow from storage to flue gas heat exchanger above 95 C 2. T.Supply Temperature at flow line above 105 C or above 95 C for 2 min Additionally, if one of the temperature sensors is faulty, the display shows 9999 C. This triggers an interrupt message and the corresponding sensor is displayed with its designation. TJ-HRC

26 Alarm Function The potential-free relay switch at output A5 is intended as a status output. As long as no critical system temperatures (see Warning Messages) occur, it is turned on. In this case, the back contact of the relay at A5 interrupts the power supply of the alarm transmitter and remains turned off. If the system temperatures are critical or the control fails completely, e.g. due to an internal fuse failure, the relay at A5 closes the separate power supply at the alarm transmitter. Using programming TJ-HRC100 Steam, the potential-free output A5 is used for the standby function of the high-efficiency pump. 26 TJ-HRC-0218

27 6.5 Hydraulic Systems / Wiring Diagrams TJ-HRC 100 Flue Gas Return flow Heat exchanger A12/A15 S1 M A1 Flow line S10 Storage tank Baking oven S9 M Loading pump Actuator of bypass flap Pt1000 for heat exchanger Pt1000 for storage tank A5 TJ-HRC

28 6.5.2 TJ-HRC 100 Steam Return flow A5/A15 VC Vapour condenser S1 Flow line Storage tank S10 Baking oven S9 Loading pump Pt1000 for heat exchanger Pt1000 for storage tank 28 TJ-HRC-0218

29 6.5.3 TJ-HRC 100M Motorized 3-way-valve, Control via 0-10V from A15 0V: AB B, 10V: AB - A M Return flow AWT Waste gas heat exchanger S1 A12 AB B A S10 M A1 Flow line Storage tank S9 Baking oven M Loading pump Actuator of bypass flap Pt1000 for heat exchanger Pt1000 for storage tank A5 TJ-HRC

30 6.5.4 TJ-HRC 100 VC HE Waste gas heat exchanger VC Vapour condenser HE Return flow S1 HE Flow line M A1 S2 S11 A13/A16 A12/A15 Storage tank S10 Baking oven VC Flow line VC Return flow S9 M Loading pump Actuator of bypass flap Pt1000 for heat exchanger Pt1000 for storage tank A5 30 TJ-HRC-0218

31 6.5.5 TJ-HRC 100M VC Motorized 3-way-valve, Control via 0-10V from A15 0V: AB B, 10V: AB - A A12 M HE Return flow VC Vapour condenser AB B A HE Flow line HE Waste gas heat exchanger S1 S2 S11 M A1 A13 A16 S10 VC Flow line Storage tank VC Return flow S9 Baking oven M Loading pump Actuator of bypass flap Pt1000 for heat exchanger Pt1000 for storage tank A5 TJ-HRC

32 6.5.6 TJ-HRC 200 Flue Gas HE Return flow A12/A15 A13/A16 HE Waste gas Heat exchanger 1 and 2 M A1 S1 M A2 S2 HE Flow line S10 Storage tank S9 Baking oven Baking oven Loading pump A5 M Actuator of bypass flap Pt1000 for heat exchanger Pt1000 for storage tank 32 TJ-HRC-0218

33 6.5.7 TJ-HRC 200 VC Return flow A12/A15 A13/A16 VC Vapour condenser 1 and 2 S1 S2 Flow line S10 Storage tank S9 Baking oven Baking oven Loading pump Pt1000 for heat exchanger Pt1000 for storage tank TJ-HRC

34 6.5.8 TJ-HRC 200M 34 TJ-HRC-0218

35 TJ-HRC

36 6.5.9 TJ-HRC 200VC 36 TJ-HRC-0218

37 Operation Manual TJ-HRC TJ-HRC

38 TJ-HRC200MVC 38 TJ-HRC-0218

39 Operation Manual TJ-HRC TJ-HRC

40 7 Failure Analysis If, contrary to expectations, an error should occur in your system, you may contact us directly. Please have the serial number of your device ready when doing this. Neue Energie-Technik GmbH Frauenstr. 32 Phone +49 (0) Maisach, Germany Fax +49 (0) TJ-HRC-0218

41 Operation Manual TJ-HRC 8 Appendix Wiring Scheme Safety Temperature Limiter TJ-HRC