Site Requirements - gledhill BMA 120 SP Design, Installation And Servicing Instructions

2.1 SITE REQUIREMENTS

The appliance is designed to be installed in an airing/cylinder cupboard and the
relevant minimum dimensions are provided in section 1.2 Technical Data.
Because of the ease of installation we recommend that the cupboard construction
is completed and painted before installation of the appliance. The cupboard door
can be fi tted after installation.
If the unit needs to be stored prior to installation it should be stored upright in a
dry environment and on a level base/fl oor.
Installation and maintenance access is needed to the front of the appliance and
above the F & E cistern. See Technical Data section for further details.
The minimum dimensions contained in section 1.2 Technical Data allow for the
passage/connection of pipes under the appliance from any direction as long as the
appliance is installed on the installation base provided. If the installation base is not
used extra space may be needed to allow connection to the pipework and the whole
of the base area should be continuously supported on a material which will not easily
deteriorate if exposed to moisture.
The fl oor of the cupboard needs to be level and even and capable of supporting
the weight of the appliance when full. Details of the weight when full is provided
in section 1.2 Technical Data.
The appliance is designed to operate as quietly as practicable. However, some noise
(from pumps etc) is inevitable in any heating system. This will be most noticeable
in cupboards formed on bulkheads, or at the mid span of a suspended fl oor. In these
cases the situation can be improved by placing the appliance on a suitable sound
deadening material (i.e. carpet underlay or similar).
Cupboard temperatures will normally be higher than in a conventional system
and the design of the cupboard and door will need to take this into account. No
ventilation is normally required to the cupboard.
A suitable location will be needed for the separate feed and expansion cistern. This will
often be at high level in the cupboard housing the BoilerMate A-Class. The dimensions
and clearances are provided in section 1.2 Technical Data. The location will need to
provide a suitable route for the cold feed and expansion pipe as well as the open
safety vent pipe. The location will also need to provide a suitable route and discharge
position for the warning/overfl ow pipe and the ballvalve supply from the mains cold water
system if the automatic fi ll version appliance is being fi tted.
Note: The standard appliance is supplied with a cistern but without a ballvalve
and overfl ow connector.
Nominal Min rating of
full load the isolator
current
28.5 Amps 32 Amps
Recommended circuit
protection device - based on
0.4 second disconnection
time
Electrical Supply requirements for BoilerMate A-Class
Max. recommended
cable run-based on
not exceeding 4% of
Cable size
the nominal voltage
supply of 230 VAC using
a type B breaker
2
6 mm 44 metres
32 A type B circuit breaker to BS EN
60898
or 32A type B RCBO to BSEN 61009
2.0 INSTALLATION
An electrical supply must be available which is
correctly earthed, polarized and in accordance
with the latest edition of the IEE requirements for
electrical Installations BS 7671.
The electrical mains supply needs to be
230V/50Hz.
A means for disconnection from the supply
mains having a contact separation in all
poles that provides full disconnection under
over voltage category III conditions must be
incorporated in the fi xed wiring in accordance
with the wiring rules. This shall be located
within 1m of the appliance and only serve the
appliance.
The minimum breaking capacity of the main
isolator and cable sizes/lengths at 230V shall
follow the recommendations in the table shown
opposite.
If the boiler incorporates a frost thermostat an
extra 3 core 3 amp supply cable will be required
between the boiler and the BoilerMate to
provide a supply to the boiler pump - see 2.2
Electrical Connection for further details.
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