PAW FriwaMaxi DN 25 Installation And Operation Instructions Manual Download Page 1

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PAW GmbH & Co.KG

Böcklerstr. 11, 31789 Hameln - Germany

Phone: +49-5151-9856-0, Fax: +49-5151-9856-98

E-mail: [email protected], Web: www.paw.eu

2020/06

99640x5xx-mub-en – V01

Installation and Operation Instructions

Domestic hot water modules

FriwaMidi – DN 20

FriwaMaxi – DN 25

Summary of Contents for FriwaMaxi DN 25

Page 1: ...11 31789 Hameln Germany Phone 49 5151 9856 0 Fax 49 5151 9856 98 E mail info paw eu Web www paw eu 2020 06 99640x5xx mub en V01 1 Installation and Operation Instructions Domestic hot water modules FriwaMidi DN 20 FriwaMaxi DN 25 ...

Page 2: ...Item no 99640x5xx mub en Version V01 Issued 2020 06 Translation of the original instructions We reserve the right to make technical changes without notice Printed in Germany Copyright by PAW GmbH Co KG PAW GmbH Co KG Böcklerstraße 11 31789 Hameln Germany ...

Page 3: ...te 21 7 4 Adjustment of the temperature 23 8 Maintenance 25 9 Disposal 26 10 Spare parts specialist 27 10 1 Spare parts control and insulation FriwaMidi without circulation 6405510 6405530 with circulation 6405515 6405535 27 10 2 Spare parts hydraulics FriwaMidi without circulation 6405510 6405530 with circulation 6405515 6405535 28 10 3 Spare parts control and insulation FriwaMaxi without circula...

Page 4: ...PM2 25 75 Copper solder 40 plates FriwaMidi with circulation 6405515 Grundfos UPM2 25 75 Grundfos UPM2 15 75 CIL FriwaMidi 6405530 Grundfos UPM2 25 75 Coated 40 plates FriwaMidi with circulation 6405535 Grundfos UPM2 25 75 Grundfos UPM2 15 75 CIL Station Item number Controller FC4 13 Pump primary Circulation Heat exchanger FriwaMaxi 6406510 Grundfos UPML 25 105 Copper solder 60 plates FriwaMaxi wi...

Page 5: ...n the primary circuit Piston valves in the secondary circuit Pressure relief valve in the secondary circuit Premounted controller Temperature sensor at the cold water inlet Temperature sensors at the heating flow Temperature sensor at the domestic hot water outlet Flow meter at the domestic hot water outlet Fill and drain valve to drain the heat exchanger Vent plug to vent the heat exchanger 1 3 D...

Page 6: ...tional regulations Accident prevention regulations of the professional association Instructions and safety instructions mentioned in these instructions WARNING Danger of scalding due to hot water Undesirable circulation of water in the primary circuit can cause the exit of water of up to 90 C at the withdrawal point External pumps must not be installed between the domestic hot water module and the...

Page 7: ...rts It is imperative to prevent the EPDM sealing elements from making contact with substances containing mineral oils Use a silicone or polyalkylene based lubricant free of mineral oil such as Unisilikon L250L and Syntheso Glep 1 from Klüber or a silicone spray ATTENTION Malfunction The domestic hot water module must be integrated in the potential equalisation of the electric installation If this ...

Page 8: ...k valve B Primary pump C Non return valve with drain valve D Circulation pump E Piston valve with drain valve F Piston valve with drain valve G Piston valve with drain valve and temperature sensor H Fill and drain valve and temperature sensor I Flow meter FlowSonic J Plate heat exchanger K Circulation line L Vent valve primary circuit M Temperature sensor and pressure relief valve 10 bars suitable...

Page 9: ...ation of water in the primary circuit can cause the exit of water of up to 90 C at the withdrawal point External pumps must not be installed between the domestic hot water module and the buffer tank The domestic hot water module must not be connected to a distribution manifold of a heating circuit Mounting example FriwaMidi with optional circulation set item no 640412 and with optional return dist...

Page 10: ...s 50 C 1 0 litre 55 C 1 4 litres 70 C 45 C 0 7 litres 50 C 0 8 litres 55 C 0 9 litre 80 C 45 C 0 5 litres 50 C 0 6 litres 55 C 0 7 litres Calculation example for the dimensioning of the buffer tank Temperature of the buffer tank 60 C Required withdrawal flow rate at the tap 20 l min Domestic hot water temperature set at the controller 45 C How large must the tank be to allow for a continuous withd...

Page 11: ... on the chemical composition of the water at the installation site the adequacy of the plate heat exchanger has to be checked Please observe the following table Influence of the water quality on the corrosion resistance for domestic hot water applications Water content Concentration mg l or ppm Time limits Heat exchanger with copper solder Coated heat exchanger Alkalinity HCO3 70 within of 24 hour...

Page 12: ... 5 0 0 Hydrogen sulphide H2S 0 05 no limit 0 05 0 0 Free aggressive carbon dioxide CO2 5 no limit 5 20 0 20 Total hardness dH 4 0 8 5 no limit Nitrate NO3 100 no limit 100 0 Iron Fe 0 2 no limit 0 2 0 Aluminium Al 0 2 no limit 0 2 0 Manganese Mn 0 1 no limit 0 1 0 Good durability under normal conditions 0 Corrosion may occur especially if further factors are evaluated with 0 Use is not recommended...

Page 13: ...will stop after the end of the chosen period of time Temperature dependent operation In this operation mode the circulation is only activated if the adjustable minimum temperature at the circulation temperature sensor is not reached during the chosen period of operation The circulation stops after the required temperature has been reached The operating modes can be combined with each other as wish...

Page 14: ...property The pressure relief valve integrated in the station does not replace the safety groups of the potable water connection as per DIN 1988 The pressure relief valve only protects the module from overpressures in case of servicing ATTENTION Damage to property If there are water supplies that may cause pressure surges for example flush valves washing machines or dishwashers connected to the sam...

Page 15: ...lation 1 Determine the mounting location of the domestic hot water module near the buffer tank The pipes in the heating circuit must not exceed a length of 4 m for DN 32 2 A drilling template can be used in order to facilitate the installation You will find the drilling template on the station 3 Copy the measures for the mounting holes to the wall 4 Drill the holes and insert adequate wall plugs i...

Page 16: ...t water circulation return connection 1 external thread flat sealing 3 Secondary side cold water inlet connection FriwaMidi 1 ext thread flat sealing connection FriwaMaxi 1 ext thread flat sealing 4 Secondary side hot water outlet connection FriwaMidi 1 ext thread flat sealing connection FriwaMaxi 1 ext thread flat sealing 5 Primary side flow from the buffer tank connection FriwaMidi 1 external th...

Page 17: ... in order to avoid unwanted gravity circulation To vent and flush the installation the check valves must be open For this purpose turn the ball valves into the position 45 The check valve is not operating For the operation of the installation all ball valves must be completely open position 0 Position 0 Position 45 Position 90 Check valve in operation through flow in flow direction only Check valv...

Page 18: ...alves available on site until an operating pressure of about 1 5 bars is reached Use heating water compliant with the standards VDI 2035 ÖNorm H5195 1 3 Manipulate the vent valve L cautiously to let the air escape 5 Close the vent valve L 6 Close the ball valve N by turning it into position 90 7 Check the operating pressure of the storage tank after the venting and increase the pressure if necessa...

Page 19: ...ble 2 Carry out the commissioning of the controller see controller instructions chapter Commissioning After that start the pump in the automatic manual mode PWM signal 100 see controller instructions chapter Automatic manual mode 3 Let the pump run for several minutes to vent the domestic hot water module 4 If the air noises do not stop carefully manipulate the vent valve L while the pump is still...

Page 20: ... rate of at least 10 l min and let the water run for about 2 minutes to vent the secondary circuit Close all withdrawal points of the secondary circuit afterwards 9 Make sure that the domestic hot water module is correctly integrated into the potential equalisation of the installation 10 The FriwaMidi FriwaMaxi is now ready for operation ...

Page 21: ... domestic hot water temperature the withdrawal flow rate and the temperature of the buffer tank and show their impact on the heat transfer capacity of the DHW module Example 1 Domestic hot water temperature at the withdrawal point 45 C Temperature in the buffer tank 60 C FriwaMidi maximum withdrawal flow rate 50 l min transfer capacity 121 kW FriwaMaxi maximum withdrawal flow rate 77 l min transfe...

Page 22: ...rature at the controller 60 C Temperature in the buffer tank 70 C FriwaMidi maximum withdrawal flow rate 53 l min transfer capacity 129 kW FriwaMaxi maximum withdrawal flow rate 82 l min transfer capacity 200 kW Example 2 Domestic hot water temperature at the controller 60 C Maximum withdrawal flow rate 60 l min FriwaMidi temperature in the buffer tank 75 C transfer capacity 150 kW FriwaMaxi tempe...

Page 23: ...t 5 K above the desired domestic hot water temperature Secondary side The possible withdrawal flow rate l min at the tap depends on the domestic hot water temperature set at the controller and on the temperature available in the storage tank The recommended maximum domestic hot water flow rate through the domestic hot water module FriwaMidi is 65 l min The flow rate of the FriwaMaxi is 88 l min Th...

Page 24: ...W 215 kW 50 C 53 l min 83 l min 60 l min 94 l min 149 kW 230 kW 55 C 45 l min 70 l min 57 l min 89 l min 141 kW 218 kW 60 C 37 l min 58 l min 52 l min 81 l min 130 kW 201 kW 80 C 45 C 65 l min 88 l min 65 l min 88 l min 159 kW 215 kW 50 C 65 l min 88 l min 74 l min 100 l min 181 kW 245 kW 55 C 56 l min 87 l min 72 l min 111 l min 176 kW 273 kW 60 C 49 l min 75 l min 69 l min 107 l min 170 kW 262 k...

Page 25: ...xing valve NOTICE Hygiene recommendation At temperatures below 60 C legionella bacteria can occur After a longer downtime such as holidays it is recommended to thoroughly flush all pipes for some minutes Optical control It is recommended to visually check the domestic hot water module every two months to ensure its proper operation If you notice any problems on the system consult a specialist Clea...

Page 26: ...inistration If the old electrical or electronic device contains personal data you are responsible for deleting it before you return it Batteries and rechargeable batteries must be removed prior to the disposal of the product Depending on the product equipment partly with optional accessories single components can also contain batteries and rechargeable batteries Please observe the disposal symbols...

Page 27: ...nd requests orders of spare parts will only be processed with information on the serial number The serial number is placed in the lower right corner of the support sheet of the station 10 1 Spare parts control and insulation FriwaMidi without circulation 6405510 6405530 with circulation 6405515 6405535 2 ...

Page 28: ...b en V01 2020 06 10 2 Spare parts hydraulics FriwaMidi without circulation 6405510 6405530 with circulation 6405515 6405535 only included in the scope of delivery of 6405515 and 6405535 1 3 4 5 6 6 6 7 8 9 9 9 9 9 9 10 10 10 10 10 12 9 12 9 11 ...

Page 29: ...10 Spare parts specialist 2020 06 99640x5xx mub en V01 29 10 3 Spare parts control and insulation FriwaMaxi without circulation 6406510 6406530 with circulation 6406515 6406535 2 ...

Page 30: ... mub en V01 2020 06 10 4 Spare parts hydraulics FriwaMaxi without circulation 6406510 6406530 with circulation 6406515 6406535 only included in the scope of delivery of 6406515 and 6406535 1 3 4 5 6 6 6 7 8 9 9 10 12 9 11 10 9 9 9 10 10 12 ...

Page 31: ...for FriwaMidi N00273 Primary pump Grundfos UPML 25 105 with seals for FriwaMaxi N00274 4 Circulation pump Grundfos UPM2 15 75 CIL2 with seals N00275 5 FlowSonic DN 20 with seals for FriwaMidi N00276 FlowSonic DN 25 with seals for FriwaMaxi N00277 6 Temperature sensor Pt1000 B with connection cable N00005 7 Pressure relief valve x MSV 10 bars N00008 8 Non return valve DN 20 for circulation line N00...

Page 32: ...p Grundfos UPM3 15 70 CIL3 with piston valve and non return valve 640412 Return distribution set DN 32 for FriwaMidi 3 way valve with actuator KVS value 15 640423 Return distribution set DN 32 for FriwaMaxi 3 way valve with actuator KVS value 16 640424 Withdrawal valve flame resistant ext thread self sealing 5 mm square head wrench Note One withdrawal valve is required for each piston valve 640422...

Page 33: ... Operating data Max admissible pressure primary 3 bars secondary 10 bars Operating temperature 2 95 C Equipment Check valve 2 x 200 mm wc 2 x 400 mm wc Primary pump High efficiency pump with PWM control 3 70 Watt High efficiency pump with PWM control 6 140 Watt Secondary pump optional High efficiency pump with PWM control 5 63 Watt Heat exchanger 40 plates 60 plates Flow meter FlowSonic measuring ...

Page 34: ...al data 34 99640x5xx mub en V01 2020 06 11 1 Pressure drop characteristics FriwaMidi Pressure m wc Pressure kPa Flow rate m h 11 2 Pressure drop characteristics FriwaMaxi Pressure m wc Pressure kPa Flow rate m h ...

Page 35: ...her additionally installed components Circulation set Return distribution set Others Have both circuits been flushed and vented correctly no air noises in the pump Vented Are all shut off valves open in the cold water line Open Is there a pressure of at least 1 5 bars on the primary side Checked Is there a pressure of at least 2 5 bars on the secondary side Checked Is there an error message on the...

Page 36: ...99640x5xx mub en V01 2020 06 PAW GmbH Co KG Böcklerstraße 11 31789 Hameln Germany www paw eu Phone 49 0 5151 9856 0 Fax 49 0 5151 9856 98 ...

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