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Delta Pro S 25

Floor standing combination boiler. Offers exceptional heating and hot water performance.

  • TANK-IN-TANK TECHNOLOGY
  • Available in Gas, Oil and Propane
  • Fuel
  • Boilers
  • DHW Production
  • Standard
  • Concentric
  • Floor installation
# GTIN : 5400891001318
# P/N : 04633201
Štítek 2
  • High performance, low cost combined boiler and water heater
  • Stainless steel Tank-in-Tank design
  • Choice of Burner - Low NOx premix burner, Pressure jet natural gas or LPG or Pressure jet 28 sec or 35 sec oil
  • Anti-Legionellae: hot water stored at consistently high temperature
  • Fully insulated with rigid polyurethane foam
  • Stove enameled casing
  • Control panel including thermostats, thermometer, indicators and on/off switch
  • 26kW to 55kW output
  • Can be used in battery formation for high output installations
  • Primary heating sealed system kits also available
  • Non Ecodesign compliant
Schematic
  1. Flue reduction collar with easy access for servicing.
  2. Rigid polyurethane foam insulation.
  3. PVCC dip tube with cold water diffuser.
  4. Burner (not included)
  5. Burner chamber plate with refractory ceramic fibre insulation.
  6. 95°C cut-off thermostat and manual reset safety thermostat pocket.
  7. Flue tubes.
  8. Turbulators.
  9. Stainless steel "Tank-in-Tank" hot water cylinder.
  10. Primary circuit (heating).
  11. Combustion chamber.
  12. Boiler base.
  13. Heating flow.
  14. Heating return.
  15. Domestic hot water outlet.
  16. Domestic cold water supply.
  17. Primary hot water safety valve [7 bar]
  18. Primary heating safety valve [bar 3]
  19. Flue connection Ø 100 mm
  20. Drain down valve

Constructive characteristics

Delta Pro S 25 Delta Pro S 45 Delta Pro S 55
Capacity (total) L 158 128 151 L
Capacity (primary) L 83 63 68 L
Capacity (domestic hot water) L 75 65 83 L
Capacity expansion tank(s) L - - - L
Chimney connection Ømm 100 100 100 Ømm
Connection - heating Ø" 1 F 1 F 1 F Ø"
Connection - DHW Ø" 3/4 M 3/4 M 3/4 M Ø"
Connection - re-circulation / safety valve Ø" 3/4 M 3/4 M 3/4 M Ø"
Max operating temperature °C 90 90 90 °C
Water pressure drop boiler at Δt = 20°C mbar 15 25 37 mbar
Max service pressure heating (primary) bar 3 3 3 bar
Max service pressure (DHW) bar 8,6 8,6 8,6 bar
Pressure drop flue gas mbar 0,25 0,3 0,45 mbar
Weight (empty) kg 145 168 200 kg

Heating characteristics

Delta Pro S 25 Delta Pro S 45 Delta Pro S 55
Heating time from 10 to 60°C - 6 kW (3 kW) min 32 16 16 min

Combustion

Delta Pro S 25 Delta Pro S 45 Delta Pro S 55
Input max (heating) HCV kW 31,4 54,9 65,2 kW
Input max (heating) LCV kW 28,3 49,4 58,7 kW
Combustion efficiency % 92,2 91,4 93 %
Efficiency (max output) 80/60°C % 92,20 89,8 91,8 %
CO emissions max output ppm 1 1 1 ppm
Mass rate of combustion products (gas) kg/h 47 84 102 kg/h
NOx class (EN15502) 5 5 5
Output power max (80/60°C) kW 25 44,9 56 kW

Domestic hot water performance

Delta Pro S 25 Delta Pro S 45 Delta Pro S 55
Peak flow at 40°C L/10’ 268 316 362 L/10’
Peak flow 1st hour at 40°C L/60’ 806 1284 1533 L/60’
Continuous flow at 40°C L/h 645 1161 1405 L/h

Electrical Characteristics

Delta Pro S 25 Delta Pro S 45 Delta Pro S 55
Voltage V 230 230 230 V
Frequency Hz 50 50 50 Hz
Protection IP 30 30 30
Electrical consumption W 83 83 83 W
Electrical power requirements A 0,4 0,4 0,4 A

Eco Design Fields

Delta Pro S 25 Delta Pro S 45 Delta Pro S 55
Seasonal space heating efficiency (35°C) % 80.1 80.1 82 %
Delta Pro S 25 Delta Pro S 45 Delta Pro S 55
Dimensions A (mm) 1615 1615 1760 (mm)
Dimensions B (mm) 1386 1386 1586 (mm)
Dimensions C (mm) 360 390 390 (mm)
Dimensions D (mm) 1445 1445 1645 (mm)
Dimensions E (mm) 1445 1445 1645 (mm)
Dimensions F (mm) 1400 1400 1600 (mm)

Technical brochure

Delta

5.08MB – ru

Delta Pro - Concentric Kit

1.03MB

Delta Pro S & Pro Pack - Installation, operations and maintenance instructions

5.05MB – en

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