1 TECHNICAL
INFORMATION
4
1.2
NOMINAL BOILER RATINGS - Natural gas (G20)
1.3 PUMP
PERFORMANCE
∆
T given above, is the temperature difference between the central heating flow and return connections.
The recommended range of
∆
T across the boiler is between 11 and 20°C.
The pump head given above is the residual pump head available for the heating system.
Note
: When designing the heating system, especially at the higher output (28.40 kW) the pump head,
expansion vessel size, radiator mean temperature, etc. must all be taken into account.
1.4
FLUE LIMITATIONS
Co-axial flue size..................................................
100/60 mm
Twin pipe flue size................................................
80/80 mm
Co-axial flue maximum length..............................
4 m (3 m with one elbow)
Reduction per elbow............................................
0.8 m (45° and 90°)
Twin pipe maximum length..................................
20 m (total air + fumes)
Reduction per 90° elbow
(large radius)..........
0.6 m
(small radius)..........
3.0 m
Minimum pipe length............................................
0.5 m
Flow rate..............................................................
68 kg/h
Summary of Contents for RIO 140
Page 33: ...10 WIRING DIAGRAMS 33 10 1 ILLUSTRATED WIRING DIAGRAM ...
Page 34: ...10 WIRING DIAGRAMS 34 10 2 FUNCTIONAL FLOW WIRING DIAGRAM ...
Page 35: ...11 SEQUENCE OF OPERATION CHARTS 35 11 1 AUTOMATIC IGNITION SEQUENCE ...
Page 36: ...11 SEQUENCE OF OPERATION CHARTS 36 11 2 OPERATION IN CENTRAL HEATING MODE ...
Page 37: ...11 SEQUENCE OF OPERATION CHARTS 37 11 3 OPERATION IN DOMESTIC HOT WATER MODE ...
Page 47: ...NOTE 47 ...
Page 54: ...6 ELECTRONIC TIMER Description of controls see Figs 3 and 4 ...
