️🚨 This product is no longer manufactured

The descriptions and diagrams below are for information only.

Portrait

WaterMaster 25

Condensing domestic hot water heater

  • Available in Natural gas and LPG
  • TANK-IN-TANK TECHNOLOGY
  • Also available in 70-85-120kW.
Short Energy Label DHW
  • label_energy_GAS
  • Hot Water Heater
  • Standard
  • Concentric
  • Floor installation
# GTIN : 5400891033487
# P/N : A1002669
Label 2
  • Certified EN89 - Ecodesign Lot 2 (EN 812/2013 - EN 814/2013)
  • Equipped with ACVMax burner and modbus controls
  • Condenses in hot water mode
  • Delivers an exceptional peak and continuous volume of hot water
  • Stainless Steel domestic hot water tank - no anode protection required
  • Space saving footprint - reduced plant-room space requirement
  • Stainless steel heat exchanger reduces maintenance and increases system lifespan
  • Multiple units can be grouped in cascade for larger applications or back up
Schematic
  1. Concentric flue gas/air inlet box
  2. Flue gas exhaust tube
  3. Combustion chamber
  4. Stainless steel heat exchanger
  5. Stainless steel “Tank-in-Tank” hot water production tank
  6. Primary circuit separation disc
  7. Indirect water pre-heater
  8. Condensate recovery dish
  9. Insulation
  10. High efficiency circulator pump
  11. NTC2 sensor (CH return)
  12. Pressure sensor
  13. Electrical panel (with spare fuses at the back)
  14. ACVMax Control panel
  15. DHW tank dry well (Dip tube with temperature sensor)
  16. Automatic air vent
  17. Gas pipe
  18. NTC1 sensor (CH supply)
  19. Gas valve
  20. DHW safety valve / (T and P relief valve)
  21. Modulating air/gas premix burner with fan
  22. Air inlet

Constructive characteristics
Capacity (total) 196 L
Capacity (primary) 100 L
Capacity (domestic hot water) 96 L
Coil capacity 0 L
Chimney: Max pressure drop in flue pipe 130 Pa
Chimney: max length of concentric flue pipe 20 m
Chimney connection 80/125 Ømm
Connection - heating 1 F Ø"
Connection - DHW 1 M Ø"
Connection gas 3/4 M Ø"
Connection - safety valve 1/2M Ø"
Max operating temperature 87 °C
Water pressure drop boiler at Δt = 20°C 3 mbar
Max service pressure heating (primary) 3 bar
Max service pressure (DHW) 8,6 bar
Height when tilted 1855 mm
Weight (empty) 177 kg

Heating characteristics
Pre-heating time from 10 to 80°C (Heat source: boiler) 35 min
Reheat time from 40 to 90°C 30 min
Reheat time from 40 to 80°C 22 min
Heating time from 10 to 90°C 43 min

Combustion
Input max (heating) HCV 27,8 kW
Input max (heating) LCV 25 kW
Combustion efficiency 98,2 %
Efficiency DHW mode ΔT 30K 105,4 %
Efficiency DHW mode (EN89) 108,5 %
CO emissions max output 27 ppm
CO emissions min output 6 ppm
Mass rate of combustion products (gas) 42 kg/h
NOx weighted (GCV) (EN15502) 21,5 mg/kWh
NOx class (EN15502) 6
Gas flow rate (min output) 0,5 m³/h

Domestic hot water performance
Peak flow at 40°C 361 L/10’
Peak flow 1st hour at 40°C 1018 L/60’
Continuous flow at 40°C 788 L/h
Peak flow at 45°C 301 L/10’
Peak flow 1st hour at 45°C 865 L/60’
Continuous flow at 45°C 676 L/h
Peak flow at 60°C 183 L/10’
Peak flow 1st hour at 60°C 577 L/60’
Continuous flow at 60°C 473 L/h

Electrical Characteristics
Voltage 230 V
Frequency 50 Hz
Protection IP 30
Electrical consumption 95 W
Electrical power requirements 0,7 A

Eco Design Fields
Declared load profile L
Water heating energy efficiency class A
Water heating energy efficiency [ηwh] (EU 814/2013 Art 2 (15) Ann.IV-3) 87,2 %
Sound power level indoors LWA 60 dB
Energy Label
Product Fiche

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Marketing brochure

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6.20MB – it

Ecodesign

Energy Label

Product Fiche

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