Technical Information. A U R O R A Konrad G. Schulz GmbH & Co. KG Tel.: /

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1 1/8 Heater Mini Content: 1 Safety advises 2 Device description 3 Function description 4 Operation 5 Installation 6 Technical data 7 Maintenance 8 Spare parts 9 Optional accessories 10 Fault diagnosis A U R O R A Konrad G. Schulz GmbH & Co. KG Tel.: / info@aurora-eos.com The information on this document and the copyrights are ownership of AURORA Konrad G. Schulz GmbH & Co. KG, Joachim Schulz str.4, D Mudau. Transmission or duplication of this document or the utilization of the contents is not allowed without the agreement of AURORA Konrad G. Schulz GmbH & Co. KG otherwise it is explicit allowed. Violation will be prosecuted. All rights of patents, industrial designs and trademarks are reserved. Please pay attention to ISO We reserve the right to make technical modifications author: KH checked: CK released: i.a.ck date/name date/name date/name a) KH e) KH i) KH b) KH f) KH j) KH c) KH g) KH d) KH h) KH

2 2/8 1 Safety advises Please consider the following advice for your own safety. Please have maintenance work and repairs exclusively carried out by authorised personnel. Do not grip into the unit and do not put objects inside. Maintenance work is to be carried out only when the blower-motor is not running. In order to avoid injuries, the motor is to be separated from the current circuit. Attention! Danger of burning! Please do not get into contact with the heat exchanger and its connections. Cooling tubes and cooling hoses can be hot and stand under pressure. Be careful by touching them. This also applies for 2-speed versions to the resistor when working at the opened unit and the construction part has not completely cooled down. Attention: cables may not affect the resistor! At maintenance work and repairs wear necessary protective clothing. Advice for installation and maintenance work: Please pay attention to the rules for the prevention of accidents. 2 Device description The heater versions differences are the nominal voltage, the air outlets and the heat exchanger connections. This technical information is valid for the following versions: AURORA-part nominal Air outlets Heat exchanger connection- voltage / V/24V 2 air grids 120x60 mm 12 straight connection V 2 air grids 120x60 mm 12 straight connection / V/24V 2 air grids 120x60 mm connection / V/24V 2 air grids 120x60 mm connection / V/24V without air grids 12 straight connection / V/24V without air grids 12 straight connection / V/24V without air grids connection / V/24V 2 air grids 120x60 mm connection / V/24V 2 air grids 120x60 mm 15 straight connection V 2 air grids 120x60 mm 12 straight connection V 2 air grids 120x60 mm 15 straight connection / V/24V 2 air grids 120x60 mm 12 straight connection V air outlet box with 2 oval 12 straight connection sockets V angular air outlet hood 12 straight connection V air outlet hood with socket 12 straight connection 70 mm V air outlet hood with socket 12 straight connection 70 mm / V/24V air outlet box with flap and 1 socket 70 mm 12 straight connection

3 3/8 AURORA-part nominal Air outlets Heat exchanger connection- voltage V air outlet box with flap and 1 12 straight connection socket 55 mm / V/24V air outlet box with flap and 1 12 straight connection socket 55 mm / V/24V air outlet box with flap and 1 12 straight connection socket 55 mm / V/24V air outlet box with flap and 2 12 straight connection / V/24V air outlet box with flap and 2 12 straight connection sockets 55/ / V/24V air outlet box with flap and 2 12 straight connection / V/24V air outlet box with flap and connection sockets 55/ V air outlet box with 1 socket 12 straight connection 42 mm and 1 oval socket 78x55x V air outlet box with flap and 1 12 straight connection socket 78x55x3mm V air outlet box with flap and 1 12 straight connection socket 55 mm V air outlet box with flap and 2 12 straight connection oval sockets V air outlet box with flap and 1 12 straight connection / V/24V air outlet box with flap and 1 12 straight connection V air outlet box with flap and 2 12 straight connection V air outlet box with 1 socket connection 55 mm V 2 air grids 120x60 mm 12 straight connection V 2 air grids 120x60 mm connection V 2 air grids 120x60 mm 12 straight connection V 2 air grids 120x60 mm 12 straight connection / V/24V air outlet box with flap and 2 12 straight connection V/24V air outlet box with 1 socket 12 straight connection 80 mm V 2 air grids 120x60 mm 12 straight connection / V/24V 2 air grids 120x60 mm Ø12 90 connection V air outlet hood with round 15 bent connection nozzle RD V air outlet hood Ø70 15 straight connection / V/24V 2-speed with resistor 15 straight connection V air outlet hood Ø70 15 bent connection V air outlet hood Ø70 15 straight connection / V/24V 2-speed with resistor 15 straight connection V 2-speed with resistor air outlet hood Ø rotated from the suction side 12 straight connection Note: Some versions are no longer available

4 4/8 The Mini heaters are developed for the heating of cabins. The heater can basically be operated with external or recirculating air. Therefore have the requirements set into the vehicle according to the operation situation. The heater is delivered by AURORA completely pre-mounted, the installation into the vehicle is carried out by the customer. The heat exchanger and the fan wheel with motor are integrated into the heater. housing: The housing is made from glass-fibre reinforcement polyamide PA6. Blower function: A direct current motor and a fan wheel, is used. For the 2-speed version a resistor is integrated. The different blower speeds are achieved using the pre-resistor. The fan unit is protected against overload by a micro-temperature-fuse MTS (110 C) connected to the resistor. Heat exchanger-system: A flat tube heat exchanger is used. The water connection diameter is 12 mm (or. 15 mm for / , , , , / , , and / ). Examples of different Mini-versions

5 5/8 3 Function description The air is be sucked through the suction grid. The air flows through the heat exchanger and will be lead through the air outlet grille and/or the sockets into the interior room. The suction grid has the dimensions 113x113 mm. The air direction can be changed by rotating the air outlet grille by Operation A AURORA control panel (accessories) can be used. 5 Installation Please pay attention to the actual technical supplement to the general terms of sale and the safety instructions in contact & Info of Please note: max. allowable pressure for flat tube heat exchangers: 2 bar abs. The Mini can be installed in variable positions. Please pay attention to the air suction grille in the installed position. The air suction grille shall not be disguised or closed. For fixing, screws M5 in corresponding lengths can be used in connection with screw anchors with an inner diameter of M5 (part number , length 16 mm, to be set into drills from the outside). The screw length differes according to vehicle. According fixing drills are on the bottom or can be drilled at marked position on the housing. During setting the drills, please, make sure that inside components are not damaged. As an option fixing elements can be supplied by AURORA. After installation of the Mini the electrical, the water side connection and optional the air hose connections have to be set. Electrical connection for 2-speed versions: 12V: customer pre-fusing 3A necessary 24V: customer pre-fusing 2A necessary Attention: cables may not affect the resistor!

6 6/8 Connection sceme resistor: View on plug please see drawing of the according version. The warm air hoses are pushed over the heaters sockets (option). It is essential to use appropriate hose clips for connecting the warm water hoses to the heat exchanger with a tightening torque of approx. 3-3,5 Nm (if using AURORA-clips). Check the system on leaks. Check also the function of the fan unit and the air direction by switching on the blower (airflow at the outlet nozzles or socket). 6 Technical data Technical data for standard modells / : V water = 1000l/h test voltage. 13 V / 26 V V air [m³/h] Q 80 [kw] P el [W] L P [db(a)] ± 0, , The technical data of the other versions are assimilable. 2-speed version: 12V: Test result from : Test voltage 13V: [current + speed tolerance ±10%] at 23 C±5K, free blowing speed 1 ca. 1,4A current consumption speed ca /min speed 2 ca. 1,8A current consumption speed ca /min Measurement under laboratory conditions

7 7/8 24V: Test result from : Prüfspannung 26V: [current + speed tolerance ±10%] at 23 C±5K, free blowing speed 1 ca. 0,7A current consumption speed ca /min speed 2 ca. 0,9A current consumption speed ca /min Measurement under laboratory conditions Housing and air outlet hood orair outlet box made of polyamide PA6 GF35. Frame and air grille are also made of polyamide PA6 GF35. This granulate is certified to UL-HB concering burning behaviour: Further information about burning behaviour of this material: See material specification EMC: Depending on version the motor has type approval regarding ECE R10 or the complete Heater is type approved according directive 72/245/ECC. 7 Maintenance CAUTION Please pay attention to the safety advises (chapter 1) during all maintenance work. Maintenance work is only carried out by wellinformed and authorised personnel. The following checks should be carried out every month by the operator: - Check of the fixing, leak control and laying of the hoses and fittings. The hose fixings are to be tightened if necessary. - Check electric connection pipes and plug connections on correct state and firm position. Cooling water circuit: When refilling the cooling water quality has to be considered. When using AURORA water valves the warranty expires when defects occur due to contamination in the water circuit. (see TI anticorrosion/antifreeze solution. Please order in the case of need) The air suction grid has to be checked on contamination and cleaned if necessary in regularly intervals. 8 Spare parts We can deliver the heat exchanger, the motor, the fan wheel, the resistor, the cable set or the air grid as spare parts. For versions with hood the hood is also spare part. For the 2-speed version a resistor is spare part. Please see spare parts list of the heaters. More information about spare parts please see spare parts list of the respective heater. 9 Optional accessories As well as the control panel and the water valve a comprehensive range of accessories have been especially developed for the Mini. Details upon request.

8 8/8 10 Fault diagnosis Fault Cause Remedy No air flow Fuse defective or loose Check the seating of the fuse? If necessary insert correctly. Renew defective fuses. Interruption of line Test lines on loose contacts or breaks Blower motor defective replace motor Mini will not operate at all speeds (2- speed versions) No or insufficient heating power Water escaping from the unit switch for blower defective Micro-temperature fusing (MTF) has been triggered Switch for blower defective Connecting plug has become loose Resistor defective Water supply temperature to low Water valve will not open fully change operation element Exchange resistor and check the blower motor for the cause of functional faults change operation element Check plug connection of unit for proper seating. If not assemble it correctly Check connection on switch Exchange resistor Wait until the motor is warm Check & renew water valve if necessary incl. actuation operation, check flow direction Check heat exchanger and clean it if necessary Heat exchanger fins contaminated Water lines kinked or squashed Eliminate fault by installing correctly Hose connection has come Check hose seatings and tighten hose loose clamps Water hose damaged Install and connect new hose Heat exchanger damaged Install and connect original replacement part. Warning! Follow safety instructions! coolant system pressure too high reduce absolute coolant pressure max. allowable pressure: 2 bar