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7.4 - SILVER UTILITY - TECHNICAL DETAILS & DIMENSIONS
Heat Output kW 15-20 20-26 26-35
CONNECTIONS
Heating Flow 1” BSP 1” BSP 1” BSP
Heating Return 1” BSP 1” BSP 1” BSP
Drain Off Valve
1
/
2
” BSP
1
/
2
” BSP
1
/
2
” BSP
Condensate Trap
22mm dia. plastic
WATER CONTENT
Boiler 24 litres 24 litres 24 litres
FLUE (Indoor Boilers)
Balanced Flue Assembly 125 (5”) mm dia. 125 (5”) mm dia. 125 (5”) mm dia.
Max. Low Level Flue Length 1.5m 1.5m 1.5m
Max. High Level Balanced Flue Length 6m 6m 6m
HEATING SYSTEM (SEALED) Fit in accordance with BS 7074 Part 1, BS 5449, OFTEC standards and all other relevant legislation.
Preset Pressure Relief Valve 2 bar
WATER SIDE RESISTANCE 12-20kW 20-26kW 26-35kW
Flow Rate To Give A Nominal Output At 10K Differential
Flow Rate Measured 1642 kg/h 2135 kg/h 2874 kg/h
Waterside Resistance 0.18 mbar 0.18 mbar 0.18 mbar
Flow Rate To Give A Nominal Output At 20K Differential
Flow Rate Measured 870 kg/h 1131 kg/h 1523 kg/h
Waterside Resistance 0.19 mbar 0.19 mbar 0.19 mbar
PRESSURE JET OIL BURNERS RIELLO RDB 2.2
FUEL Kerosene 28 Second Class C
ELECTRICAL SUPPLY 230V AC 50Hz 5A
TEMPERATURE CONTROL
Boiler Central Heating Control 60˚C - 80˚C
Boiler Safety Limit 110˚C
Thermostats have an operating tolerance of ± 4˚C
Front View Side View Top View
W D
F
G
H
A
C
E
B
Model - Silver
(output range)
Weight
kg
Dimensions (mm)
H W D A B C E F G
Silver Utility 15-20kW 125 845 442 610 755 221 157 94 125 502
Silver Utility 20-26kW 128 845 442 610 755 221 157 94 125 502
Silver Utility 26-35kW 131 845 442 610 755 221 157 94 125 502
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