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Summary of Contents for Watts HK20 Series
- Page 1 Series HK/HKM 20 Pump groups for unmixed and mixed heating circuits Installation and operating manual (translated from the original operating manual) Watts.eu...
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Page 2: Table Of Contents
Contents 1 General Information General Information ............1.1 Important information about the installation and Important information about the installation and operat- operating manual ing manual..............NOTICE Notes on supplier documents........Product conformity............The plant operator is responsible for ensuring compliance with the local laws and regulations (e.g. -
Page 3: Safety
2.5 Responsibilities of the operator 2 Safety The operator must ensure that: 2.1 Safety notices • The product (HK20 & HKM20) is only used for its intended pur- pose. DANGER • The product (HK20 & HKM20) is installed, operated and main- tained according to the specifications in the Installation and DANGER indicates an imminent danger that may cause serious Operating Manual. -
Page 4: Technical Specification
3 Technical specification Hydraulic data Max. operating pressure 6 bar Ambient temperature -10 to +40 ° (see pump specifications) Operating temperature +2 to +90 ° (see pump specifications) Gravity brake opening pressure 10 mbar Kvs mixing valve 4.0 or 6.3 m³/h depending on the mixing valve model (only on HKM20) Temperature display range 0 - 120 °C Nominal width... -
Page 5: Pressure Loss Diagrams
4 Pressure loss diagrams HK20 1.000 1.000 10.000 Flow rate [L/h] HKM20 1.000 1.000 10.000 with mixer Kvs 4.0 Flow rate [L/h] with mixer Kvs 6.3 HK20-HKM20-IM-DE-W-UK-02-2025-Rev.2 | Part no. 10070455... -
Page 6: Dimensions
5 Dimensions The reproduction, distribution and utilization of this document as general tolerances surface scale 1 : 2 material weight The reproduction, distribution a well as the communication of its contents to others without explicid well as the communication of it (theoretical) DIN ISO 2768-1-m authorization is prohibited. -
Page 7: Component Overview
6 Component overview Fig. 5: HK20 Fig. 7: HK20-KH Boiler circuit supply inlet Heating circuit supply outlet Heating circuit return inlet Boiler circuit return outlet Wall bracket Thermowell for supply line temperature sensor (optional) Ball valve with gravity brake (supply) Circulation pump Additional ball valve (HK20-KH) 3-way mixing valve (HKM20) Actuator (HKM20) -
Page 8: Installation And Commissioning
2. Drill the hole according to the screw and wall plug size. 7 Installation and commissioning 3. Insert wall plug. 4. Screw the hanger bolt into the wall plug leaving at least 50 mm 7.1 General safety information of the hanger bolt protruding from the wall. DANGER 5. -
Page 9: Switching The Supply And Return Lines
7.6 Switching the supply and return lines 6. Loosen the connection to the ball valve, rotate the return line and then tighten the connection to the ball valve again. ü The supply is on the right-hand side 7. Remove the end cap from the 3-way mixing valve and then 1. -
Page 10: Maintenance
8.4 Removing the circulation pump 8 Maintenance 1. Disconnect the power supply and secure against reconnec- 8.1 General safety information tion. 2. Remove the pump group front shell. DANGER 3. Close the shut-off valves. 4. Remove the thermometer handles and the intermediate insula- Electricity! tion. -
Page 11: Removing The 3-Way Mixing Valve
8.6 Removing the 3-way mixing valve 8.8 Fitting the actuator 1. Disconnect the power supply and secure against reconnec- The following installation instructions apply specifically to the tion. EVO2 actuator. 2. Remove the pump group front shell. Instructions for fitting/removing the actuator can be found in the 3. -
Page 12: Disposal
Warranty: all sales and contracts for sale are expressly conditioned on the buyer’s assent to Watts terms and conditions found on its website www.watts.eu/en/gtc. Watts hereby objects to any term, different from or additional to Watts terms, contained in any buyer communication in any form, unless agreed to in a writing signed by an officer of Watts.
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