Keston Boilers

Tel: (+44) 020 8462 0262

Email: info@keston.co.uk
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support information

Celsius 25 condensing boiler

The section below details the performance data for the Celsius 25 condensing boiler. Further down the page are links to exploded diagrams to help identify spare parts.

Technical Specification

Celsius 25

Celsius 25P

Max. Input
k/W/(Btu/h)
26.1/(89,000)
25.0/(85,300)
Max. Output to Water
 
 
 
(80/60C Flow/Return)
k/W/(Btu/h)
23.1/(78,800)
22.7/(77,500)
(50/30C Flow/Return)
k/W/(Btu/h)
25.2/(86,000)
24.8/(84,600)
Min. Output to Water
 
 
 
(80/60C Flow/Return)
k/W/(Btu/h)
7.0/(23,900)
6.8/(23,200)
(50/30C Flow/Return)
k/W/(Btu/h)
7.7/(26,200)
7.4/(25,400)
Max. Burner Press. - Hot (factory preset)
mbar/(in w.g)
-3.15 (-1.26)
 -4.60(-1.84)
Gas Consumption After 10 Mins.
l/s / (ft³/hr)
0.68/(85.7)
0.313/(39.5)
Max. Operating Flow Temp.
°C
82.00
82.00
Max. Head (Open Systems)
m/(ft)
30.50/(100)
30.50/(100)
Max. Press. (Sealed Systems)
Bar
2.70
2.70
Min. Head (Open Systems)
m
3.0
3.0
Inlet Gas Pressure
mbar/(in w.g)
20.0/(8.0)
37.0/(14.8)
Recommended Temperature Differential
°C
8 to 20
8 to 20
Electrical Supply
 
230V 50Hz
230V 50Hz
Power Consumption - inc. pump (Max)
W
160
160
Cabinet Height
mm
621
621
Cabinet Width
mm
472
472
Cabinet Depth
mm
250
250
Side Clearance
mm 
1
1
Base Clearance
mm 
100
100
Front Clearence (when servicing)
 mm
 305
305
Top Clearance
mm 
 150
150
Weight - Full
kg/(lbs)
 43.0/(95.0)
43.0/(95.0)
Weight - Empty
kg/(lbs)
 38.0/(84.0)
38.0/(84.0)
Flow and Return Connections
 
Rp 0.75" F
Rp 0.75" F
Gas Connection
 
Rp 0.5" F
Rp 0.5" F
Condensate Connection
 
 22mm plastic overflow
Flue Pipe (nominal bore)
mm/(in)
 50/(2)
50/(2)
Air Intake Pipe Size (nominal bore)
 
 50/(2)
50/(2)
Flue and Air Intake Material
 
  muPVC (BS5255)
Max. Air Intake length
m
 39
39
Max. Flue Outlet Length
m
 20
20
Max. Total Outlet and Air Intake Length
m
 40
40
Type of Gas
 
G20 Natural Gas
G31 LPG  
Optimum Flue Gas CO2 Level
%
8.4
10.0
Destination Countries
 
GB / IE
GB / IE
SEDBUK Efficiency
Band / %
A / 90.4
A / 93.3
British Gas GC no.
 
41 930 06
41 930 06

Celsius 25 Exploded Assembly Diagrams :

Boiler controls assembly Pic.
Gif File
Waterway, Condensate & Flue Assembly
gif File
Air - Gas Assembly
Gif File
Casing Assembly
Gif File

 

  
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KESTON Boilers Limited, 34 West Common Road, Hayes, Bromley, Kent BR2 7BX, United Kingdom, Telephone: 020 8462 0262 Fax: 020 8462 4459 General Information: info@keston.co.uk
Designed and built by PRG.