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Summary of Contents for Watts HK25
- Page 1 Series HK/HKM 25/32 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
Important safety instructions.......... This Installation and Operating Manual Intended use ..............• is the component of the product (HK25/32 & HKM25/32); • contains instructions and information on safe and correct in- Foreseeable misuse............stallation and commissioning of the product (HK25/32 &... -
Page 3: Safety
Fitter/commissioner • The product (HK25/32 & HKM25/32) must not be used if it is Due to their specialist training and knowledge, and taking into damaged or is no longer operating correctly. In this case, con- consideration the applicable standards, provisions, regulations tact your specialist dealer immediately. -
Page 4: Technical Specification
Weight Weight without packaging HK25: 3.6 kg without pump; 5.7 - 6.6 kg with pump, depending on pump model. HK32: 4.6 kg without pump; 6.5 - 7.6 kg with pump, depending on pump model. HKM25: 4.9 kg without pump; 6.9 - 7.9 kg with pump, depending on pump model. -
Page 5: Pressure Loss Diagrams
4 Pressure loss diagrams HK25, HK32 1.000 1.000 10.000 100.000 HK25 Flow rate [L/h] HK32 HKM25, HKM32 1.000 1.000 10.000 100.000 HKM25 Flow rate [L/h] HKM32 Diagramm Gesamtdruckverlust HKV 2013.xls HK-HKM-25-32-IM-DE-W-UK-02-2025-Rev.4 | Part no. 10025988... -
Page 6: Dimensions
Fig. 4: DN25/32 HK25, HK25-KH, HKM25: G 1½ male thread, with flat seals without screw fitting. G 1 female thread with screw fitting; HK32, HKM32: G 2 male thread, with flat seals without screw fitting. G 1¼ female thread with screw fitting. -
Page 7: Component Overview
6 Component overview Fig. 5: Component overview HK25 and HK32 Fig. 7: HK25-KH component overview Boiler circuit supply inlet Heating circuit supply outlet Heating circuit return inlet Boiler circuit return outlet Wall bracket Screw fittings G 1½ union nut x G 1 female thread (DN25);... -
Page 8: Installation And Commissioning
7.4 Starting the unit 7 Installation and commissioning ü The pump group is fully installed. 7.1 General safety information ü The fittings are preassembled at the factory; however, the tightness of the seal is to be checked before commissioning DANGER (pressure test). -
Page 9: Switching The Supply And Return Lines
7.6 Switching the supply and return lines 4. Loosen the nut on the return ball valve and rotate the latter through 180 degrees. Remove the actuator from the 3-way ü The supply is on the right-hand side mixing valve. 1. Disconnect the power supply and secure against reconnec- 5. -
Page 10: Maintenance
Hot water! Severe scalding possible. Hot surfaces! • Allow the product (HK25/32 & HKM25/32) to cool before car- Risk of serious burns. rying out any maintenance, cleaning or work repair. • Do not touch the pipes or components during operation. -
Page 11: Fitting The 3-Way Mixing Valve
8.6 Fitting the 3-way mixing valve Right-handed installation 1. Replace the seals on the screw connections. 2. Position the 3-way mixing valve (A) and tighten the union nuts (X). Tightening torques for DN25 pump groups • Pump G 1½, AFM 34/2 seals: 130 Nm. •... -
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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