9
GB-031C/f.347
Boiler Protection
The recommended protection for hard wired boilers are as fol-
lows:
Model No
Boiler size
Protection (per phase)
FUSION 24 kW
24kW BOILER
40 AMP Protection
FUSION 14.4kW
14.4kW BOILER
80 AMP Protection
FUSION 12kW
12kW BOILER
63 AMP Protection
FUSION 9kW
9kW BOILER
45 AMP Protection
FUSION 6kW
6kW BOILER
32 AMP Protection
External Controls
We recommend the use of the EHC Select 107XL Programmer
and EHC TLX 4101 room stat for heating only installations
For Heating and Hot water installations, we recommend the use
of the EHC ‘Heat Pack’ which includes the EHC Select 207XL
programmer.
The EHC ‘Heat Pack’ will incorporate all the relevant parts to
comply with current building regulations i.e. Motorized valves to
control the heating and hot water circuits and Room and cylinder
thermostats to control the room and water temperatures. This will
also provide boiler interlock. The use of TRV’s alone will not pro-
vide boiler interlock
We recommend the use of TRV’s, however they must not be used
in the room that has the room thermostat fitted.
Note: This control method is recommended by TACMA (The As-
sociation of Control Manufactures) in order to comply with the
current Building Regulations.
ALL WIRING MUST BE CARRIED OUT IN ACCORDANCE WITH
CURRENT IEE BS7671 WIRING REGULATIONS
ALL ELECTRICAL CONNECTIONS MUST BE MADE BY A QUALI-
FIED TRADESPERSON
A load check should be carried out to ensure that there is a sufficient
current and voltage for the intended boiler installation. Consideration
should be taken into account with regard to the remainder of the
properties load requirements.
All boilers must be protected at the meter position with a double pole
fused switch with a minimum of 3mm contact separation. If the boiler
is not fitted local to the meter position then an isolation switch must
be fitted local to the boiler
THIS APPLIANCE MUST BE EARTHED.
All pipe-work must be earthed in accordance with the IEE BS7671
Wiring Regulations.
After completion of all electrical works, an electrical safety check
should be carried out i.e. short circuit, earth continuity, resistance to
earth and polarity check, and all relevant Test Certificates completed.
Never open the front cover of the boiler until all power supplies to the
boiler have been disconnected.
ELECTRICAL CONNECTIONS
The boiler connections are clearly marked inside the boiler L
W
N
(24hr LIVE)
The 24hr live is the permanent live connection to the boiler from
the mains supply. External controls will require an independent
fused spur supplied from the consumer unit., however this fused spur
should be supplied by the same power source as the boiler itself.
ELECTRICAL CONNECTIONS AND CONTROLS
Electrical ‘mains’ connection
Figure 6
