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1. INTRODUCTION - Page 2
The Main Thames is a room sealed instantaneous water heater designed to supply hot water to several outlets which may
be situated in different rooms, but not necessarily at the same time.
The pilot is lit by a piezo spark igniter: no batteries or electricity are required. The main burners will automatically light when
a domestic hot water tap is turned on and go out when the tap is turned off.
This appliance is not suitable for use with a swivel spout.
ENERGY CUT-OFF DEVICE
This appliance contains an Energy Cut-Off Device that will shut down the gas supply to the appliance if the water within the
heat exchanger exceeds the anticipated temperature limit after the hot water tap has been turned off - See Page 22.
VENTILATION
Being a room sealed appliance, the Thames does not require an air vent in the room or space in which it is installed.
Where this appliance is installed in a compartment, air vents to the compartment at both high and low levels, should be
provided for cooling.
Further guidance is given in BS 5440 Pt.2.
In compartment which is ventilated to room
In compartment which is ventilated to outside
GENERAL
IMPORTANT: The area of wall covered by the appliance must be flat.
The clearances required around the Flue Terminal are shown on the Flue Template supplied with the Terminal Pack.
The appliance must be fitted on an external wall to allow the Flue Terminal to pass directly through the wall to the outside
air.
If the appliance is to be installed into a "SEDUCT" the minimum duct required is 228mm (9in.) deep, 349mm (15 ½in.) wide.
This appliance may take the place of an existing appliance and will mount onto the original flue terminal of any of the
following: AVON, BRISTOL, MEDINA, MEDINA D/L, MEDWAY, MERSEY, SEVERN 3, SEVERN 4, SEVERN 5 and TRENT.
Position of Air Vent
High
Low
274 cm²
274 cm²
42 in²
42 in2
137 cm²
137 cm²
21 in²
21 in²
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