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2.
FOR THE INSTALLER
2.1
Installation instructions
This water heater must be fitted in a
location which will permit the provision
of an approved flue system and
adequate ventilation.
A service clearance of 15 cm at the
sides and rear of the unit and 60 cm at
the front of the unit should be allowed
for ease of servicing. Adequate
distance must be allowed between the
top of the unit and any obstruction or
ceiling to allow the flue baffle and
anode to be inspected, cleaned or in the
case of the anode replaced if
necessary.
The water heater must stand on a level
surface resistant to heat and with
sufficient strength to support the weight
of the unit when full of water.
This water heater must not be installed
in a bath room, bedroom or in a cup-
board opening on to such rooms. This
water heater must not be installed in
any area where flamable materials are
used or stored.
Insufficient ventilation may give rise to a
risk of fire, explosion or suffocation. If
in doubt consult the national and local
regulations governing the installation of
gas appliances or your local British gas
service department.
2.1.1 Installation
The installation of this water heater
should be carried out by a suitably
qualified competent person. It is a
criminal offence for unqualified persons
to install gas equipment.
Installation should be carried out in
accordance with all local authority and
building regulations, local water
authority and fire regulations and the
following British standards: 5440, 5546,
6644, 6700, 6798 and 6891.
Some chemicals produce vapours
which can cause rapid failure of
thermocouples, burners and storage
tanks if they are drawn into the
combustion air supply.
Therefore if this water heater will be
used to supply hot water to:
-
hairdressers,
-
dry cleaners
-
industrial degreasing processes
or any other area where compounds
containing halogens are used and
stored, care should be taken that all
primary and secondary air is drawn
from outside atmosphere free of such
contaminents.
For further advise contact A.O. SMITH.
2.1.2 Water connections
A.O. Smith water heaters are suitable
for connection to vented, unvented and
pumped pressurised systems. In each
case appropriate valves and fittings
should be used to ensure the system
complies with the requirements of the
water by laws, and appropriate building
regulations.
When fitting it is essential the rules of
'good practice' are applied at all stages
of installation.
Vented systems
If the water heater is to be connected to
a cold feed tank or cistern the hot water
supply pipe must include an open vent
which discharges over the cold feed
cistern. The cold feed cistern must have
an actual capacity of greater volume
than the hourly recovery rate of the
water heater(s) which it supplies.The
minimum actual capacity is 50 gallons or
227 litres.
Unvented
To install an A.O. Smith water heater on
an unvented cold water supply system
a kit of valves and fittings listed by the
water research centre and complying
with part G3 of the current building
regulations should be used. Installation
should be carried out generally as
shown on the following diagram.
11
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