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The hydraulic plumbing diagram must be observed The brine liquid must be produced prior to charging the system. The brine concentration must be at least 25 %. Freeze protection down to -14°C can thus be ensured. Only antifreeze products on the basis of mono- ethylene glycol or propylene glycol may be used. The heat source system must be vented (deaerated) and checked for leaks. The brine solution must contain at least 25 % of an antifreeze and corrosion protection agent on a monoethylene glycol or propylene glycol basis. 7.4 Electrical Connection The following electrical connections must be established on the heat pump: -Connection of the control wire to terminals X1: L/N/PE in the control box of the heat pump. -Connection of the load wire to terminals X5: L1/L2/L3/PE in the control box of the heat pump. -The control of the brine pump is effected via the controller N1/J12/N03/N + PE (max. 200 W), or a pump contactor connected to these terminals (without PE). If a motor protective switch is used, the auxiliary contact (NC contact) needs to be connected to N1/J5/ID5 and X2, instead of the wire jumper which must be removed. All electrical components required for the operation of the heat pump are located in the control box. MOUNTING For more detailed instructions concerning the connection and functioning of the heat pump controller (e.g. the supplied external wall sensor) please refer to the enclosed operating manual of the controller. An all-pole disconnecting device with a contact gap of at least 3 mm (e.g. utility company disable contac- tor or power contactor) as well as a 3-pole circuit breaker with simultaneous tripping of all external conductors must be provided . The required cross- sectional area of the conductors is to be selected according to the power consumption of the heat pump, the technical connection requirements of the relevant utility company and all applicable regula- tions. Power consumption data of the heat pump is provided in the product literature and on the nameplate. The terminals are designed for a max. conductor cross-section of 35 mm.. The clockwise phase sequence must be observed when connecting the load lines (the heat pump will deliver no output and will be very noisy when the phase sequence is incorrect). The power cable must be run through the guide tubes, inserted into the side of the control box and secured by means of the strain relief. CAUTION! 7 COMMISSIONING COMMISSIONING 8.1 General Information To ensure proper commissioning it should be carried out by a customer service authorised by the manufacturer. Only then can an extended warranty period of 3 years in total be granted (cf. Warranty service). 8.2 Preparatory Steps Prior to commissioning, the following items need to be checked: -All connections of the heat pump must have been made as described in Chapter 7. -The heat source system and the heating circuit must have been filled and checked. -The strainer must have been fitted in the sole inlet of the heat pump. -In the brine and heating circuits all valves that might impair the proper flow must be open. -The settings of the heat pump controller must be adapted to the heating installation in accordance with the instructions contained in the controller's operating manual. heat pump controller. to be deactivated. Any malfunctions occurring during operation are displayed on the heat pump controller and can be corrected as described in the operating manual of the heat pump controller. 8 CAUTION! Heat source temperature max. difference between heating supply and return temperature from to -5 °C 0 °C 10 K 1 °C 5 °C 11 K 6 °C 9 °C 12 K 10 °C 14 °C 13 K 15 °C 20 °C 14 K 21 °C 25 °C 15 K 8.3 Commissioning Procedure The start-up of the heat pump is effected via the Commissioning is to be effected in accordance with the installation and operating manual of the heat pump controller. Where an overflow valve is fitted to assure the minimum heating water flow rate, the valve must be set in accordance with the requirements of the heating installation. An incorrect setting may result in various error symptoms and an increased electric power consumption. To correctly set the overflow valve, the following procedure is recommended: Close all of the heating circuits which may also be closed during operation (depending on the type of heat pump usage) so that the least favourable operating state - with respect to the water flow rate is achieved. Normally, these heating circuits are those of the rooms located on the south and west sides of buildings. At least one heating circuit must remain open (e.g. bathroom). The overflow valve is to be opened to such an extent that based on the current heat source temperature the maximum temperature difference between heating supply and return flow temperature is obtained, as indicated in the table below. The temperature difference should be measured as closely to the heat pump as possible. In mono- energetic systems, the electric heating element is CARE/...

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