Delta

Delta Pro S 25

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

# 04633201

  • Fuel
  • Boilers
  • Standard
  • Concentric
  • Floor installation
  • 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
  • Vented or unvented use, with mains pressure SystemPaks available
  • Primary heating sealed system kits also available
  • TANK-IN-TANK TECHNOLOGY
  • Available in Gas, Oil and Propane

Legend

  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 provided)
  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

Characteristics

Capacity (total) 158 L
Heating surface DHW tank 1,59
Capacity (domestic hot water) 75 L
Connection - DHW 3/4 M inches
Connection - re-circulation / safety valve 3/4 M inches
Max operating temperature (primary) 90 °C
Max service pressure (DHW) 8,6 bar
Max service pressure heating (primary) 3 bar
Weight (empty) 145 kg

Hot water performances

Peak flow at 40°C 268 L/10’
Peak flow 1st hour at 40°C 806 L/60’
Continuous flow at 40°C 645 L/h
Heating time from 10 to 60°C - 6 kW (3 kW) 32 min
Input max (heating) LCV 28,3 kW
Input max (heating) HCV 31,4 kW
Output power max (80/60°C) 25 kW
Connection - heating 1 F Ø inches
Water pressure drop boiler at Δt = 20°C 15 mbar
Gas flow rate (max output) 2,98 m³/h
Chimney connection 100 Ø mm
Operating voltage 230 V
Protection IP 30
Electrical consumption 83 W
NOx emissions max output 63 mg/kWh
Capacity expansion tank(s) - L
A 1615 mm
B 1386 mm
C 360 mm
D 1445 mm
E 1445 mm
F 1400 mm
Dim. - Depth (w/o conn.) 584 mm
Dim. - Height (w/o conn.) 1613 mm
Dim. - Width or Diameter (w/o conn.) 540 mm
Dim. - Depth (with conn.) 620 mm
Dim. - Height (with conn.) 1613 mm
Dim. - Width or Diameter (with conn.) 540 mm

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