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WD420/3/2007
Chapter 2 : General Instruction
2.6
PERFORMANCE DATA - Qudos 28s & Qudos 28sP
Min. Input (Gross CV)
Max. Input (Gross CV)
Max. Output To Water
o
(80/60
C Flow/Return)
(50/30
o
C Flow/Return)
Min. Output To Water
o
(80/60
C Flow/Return)
o
(50/30
C Flow/Return)
Max. Burner Press.-Hot
Max. Gas Cons. After 10 mins (DHW)
Max. Operating Flow Temp.
Max. Press. (Sealed System)
Inlet Gas Pressure
Recommended Temp Diff.
Electrical Supply
Power Consumption (Max)
Power Consumption (Standby)
Type of Gas
Optimum Flue Gas CO
Expected CO/CO2 Ratio (at max CH rate, case on)
Destination Countries
SEDBUK Efficiency
NOx Class
Safety Valve
Expansion Vessel Capacity
SEDBUK Rating
[NB: For larger systems an additional expansion vessel may be required]
Expansion Vessel Charge Pressure
Heating System Minimum Pressure
Seasonal Efficiency (SEDBUK) = 91.1 (Qudos 28s) & 92.9 (Qudos 28sP)
This value is used in the UK Government's Standard Assessment Procedure (SAP) for
energy rating of dwellings. The test data from which it has been calculated have been
certified by Advantica Technologies Ltd
KESTON Heating declare that there are no substances harmful to health within the
appliance or used during the production of the appliance.
The Qudos 28s is intended for domestic and commercial EMC environments and on a
governed G20 meter supply.
The Qudos 28sP is intended for domestic and commercial EMC environments and on a
governed G31 supply.
This boiler meets the requirements of SI 3083 The Boiler (Efficiency) Regulations and is therefore
deemed to meet the requirements of Directive 92/42/EEC. The CE mark on the appliance shows
compliance with Directives 90/396/EEC, 73/23/EEC and 89/336/EEC.
IMPORTANT
This product contains ceramic fibre boards, which although not regarded as a risk, contain
ceramic fibre which may cause temporary irritation to eyes, skin and respiratory tract. The
fibres are held in place by inorganic binders. Therefore as long as the boards are not
Installation & Servicing Instructions
kW/(Btu/h)
kW/(Btu/h)
kW/(Btu/h)
kW/(Btu/h)
kW/(Btu/h)
kW/(Btu/h)
mbar/(in w.g)
(Factory Preset)
l/s / (Ft
o
C
bar
mbar/(in w.g)
o
C
W
W
Level (at max CH rate, case on)
2
bar / (lbf/sq in)
litre
bar / (lbf/sq in)
bar / (lbf/sq in)
The Keston Qudos 28s & Qudos 28sP
Qudos 28s
Nat. Gas (G20)
7.8/(26,600)
29.4/(100,300)
26.4(90,500)
28.4/(96,900)
7.0/(24,900)
7.8/(26,600)
0/(0)
3
/hr)
0.76/(96.6)
82
2
20.0 / (8.0)
8 to 20
230V 50Hz
150
7
G20 Natural Gas G31 LPG
9.1±0.2
0.0007
GB/IE
91.0
5
3 / (43.5)
8
A (91.1%)
Boilers
Qudos 28sP
LPG (G31)
7.6/(26,000)
28.8/(98,300)
26.4/(90,500)
28.4/(96,900)
7.0/(24,900)
7.6/(26,000)
0/(0)
0.35/(45.0)
82
2
37.0/(14.8)
8 to 20
230V 50Hz
150
7
10.5 ±0.2
0.001
GB/IE
93.0
5
3 / (43.5)
8
A (92.9%)
1.0 / (14.5)
0.6 / ( 8.7)
Page : 9
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