201
3
General Description
The Ferroli 201 is a wall mounted combination boiler for Central Heating (C.H.) and domestic Hot
Water (D.H.W.).
The boiler is of light weight construction and the heat exchanger provides Central Heating and Domestic
Hot Water from an integrally designed unit. The boiler contains its own expansion vessel for sealed systems.
The wall mounting jig contains all the isolating cocks for the water and gas supplies which can be fitted to
the wall and provided with all the necessary gas and water connections prior to the boiler being attached.
The Central Heating and the Domestic Hot Water temperature is controlled by the Honeywell Modureg valve
in conjunction with the P.C.B. There is a limit thermostat on the central heating circuit which operates at 88°C.
There is also an overheat cut-off thermostat which will shut the boiler down completely and this thermostat
operates at 100°C. The boiler is fited with its own Central Heating pump. The pump is switched ON/OFF
by the time clock and/or a 24 Volt room thermostat. The pump circuit also has a 6 minute over-run time. There
is a Domestic Hot Water flow switch fitted and when there is a demand for Domestic Hot Water (flow
of more than 0.5 gallon/minute, 2.5 litre/minute) the Central Heating pump is switched off making available
the maximum output of the gas burner for Domestic Hot Water. On the P.C.B. the maximum output for Central
Heating can be set. This does not influence the maximum output for domestic hot water.
At the factory the central heating output is pre-set to maximum. The appliance is not suitable for external
installation.
Related Documents
This appliance must be installed strictly in accordance with these instructions:
The Gas Safety Regulations (Installations & Use) 1994.
The Local Building Regulations.
The Building Regulations.
The Buildings Standards (Scotland - Consolidated) Regulations.
British Standards Codes of Practice:
B.S. 7593 1993 TREATMENT OF WATER IN DOMESTIC HOT WATER CENTRAL HEATING SYSTEMS
B.S. 5546 1990 INSTALLATION OF HOT WATER SUPPLIES FOR DOMESTIC PURPOSES
B.S. 5440 PART 1 FLUES
B.S. 5440 PART 2 AIR SUPPLY
B.S. 5449 1990 FORCED CIRCULATION HOT WATER SYSTEMS
B.S. 6798 1987 INSTALLATION OF GAS FIRED HOT WATER BOILERS
B.S. 6891 1989 GAS INSTALLATIONS
B.S. 7671 1992 IEE WIRING REGULATIONS
B.S. 4841 1990 SPECIFICATION FOR EXPANSION VESSALS
Model Water Bye Laws.
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