THERMAL INNOVATIONS (UK) LTD | THERMAFLOW® ELECTRIC COMBINATION BOILER |
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Two isolators are required, one for the 24hr supply, and the other for the interrupted supply
(off peak if available)
Means of disconnection
of the 24hr supply should be by a double pole switched fused spur box
(fuse rating 3 amp), having a minimum contact separation of 3mm in each pole. The fused spur box
should be readily accessible and adjacent to the appliance. It should be identified as to its use.
Means of disconnection should not be fitted in a room containing a fixed bath or shower.
The 24hr
mains supply cable and other cables for external controls must be heat resistant and flexible PVC
type of at least 0.75mm2 (24/ 0.20mm)
Means of disconnection
of the interrupted supply (off peak) should be by a double pole switched
(60amp isolator with a 40 amp MCB
Type C
for the TH9/ model) and a switched (100 amp isolator
with a 50 or 63 amp MCB
Type C
for the TH12/ model), having a minimum contact separation of
3mm in each pole. The switched isolator should be readily accessible and adjacent to the appliance.
It should be identified as to its use.
Means of disconnection should be readily accessible and adjacent to the appliance. It should
be identified as to its use.
The interrupted mains supply cable must have a cross sectional area of at least (10mm² for
the TSL9/ model) and (16mm² for the TSL12/ model). The mains supply cable from the
isolator to the boiler should be preferably encased by flexible conduit.
2.1.6 Heating system controls
The heating system should have installed: A timer and room thermostat or a programmable room
thermostat controlling the central heating system.
Thermostatic radiator valves should be installed in addition to the room thermostat for better
economy and energy saving.
2.2.1 Boiler Position
The boiler must be installed in accordance with the rules in force in the countries of destination. This
boiler is not suitable for fitting outside.
Any electrical switch must be positioned so that it cannot be touched by a person using the bath or
shower.
The boiler must be positioned on a level base or floor which is sufficiently robust to take its weight,
(Refer
to table 1, “Data”)
If the location of the boiler or any part of the system is subject to severe cold weather conditions, it
is recommended that a frost thermostat is fitted. Any part of the system that may be vulnerable to
freezing must be protected.
2.2.2 Boilers in a compartment
Where the installation of the boiler will be in an unusual position, the current issue of BS 6798 gives
detailed guidance on these requirements.
An existing cupboard or compartment modified for the purpose may be used, providing minimum
clearances are maintained. Details of essential requirements for cupboards or compartment design
are given in the current issue of BS6798.