15
3. installation
3.8.2. Installing the Water Heater
The following elements are supplied with the heater :
1x 15 mm gas inlet isolation tap complete with washer
1x 15 mm x1/2” swivel nut 90° brass connector for the
hot water outlet complete with washer
1x 15 mm cold water inlet isolating valve complete
with washer for the cold water inlet
The dimensions for installing the appliance are detailed in
Sections 3.6 (page 13).
The device is equipped with a fi lter
“G”
, located on the cold
water inlet. Periodically clean the hydraulic system, if dirt is
present.
IMPORTANT!!
Do not activate the device without the fi lter.
IMPORTANT!!
If the unit is installed in a hard water area (> 200 mg/l) it is
necessary to install a water softener to reduce the formation
of limescale in the heat exchanger.
The warranty does not cover damage caused by limescale.
IMPORTANT!!
As this appliance features a safety discharge valve rated at 8
bar, t
he inlet water pressure must be limited to a maximum
of 6 bar, a pressure limiting valve must be fi tted to prevent
excessive pressure on the appliance.
Should the discharge
valve ever operate and it be found that a pressure limiting
valve is not fi tted, Ariston will not be held liable for any
damage incurred.
3.8.3 Siting the Appliance
The location chosen for the appliance must permit the
provision of a satisfactory fl ue termination (see page 14,
Section 3.8.1). The location must also permit adequate space
for servicing and air circulation around the appliance (see
page 13, Section 3.7).
The appliance may be installed in any room or internal
space, although particular attention is drawn to the current
requirements of the current edition of BS7671, in Scotland,
the electrical provisions of the Building Standards applicable
in Scotland, and in Ireland in line with the electrical provisions
of I.S. 813, with respect to the installation of a heater in a room
or internal space containing a bath or shower.
Where a room sealed appliance is installed in a room containing
a bath or shower, any electrical switch or appliance control
using main electricity should be situated so that it cannot be
touched by a person using the bath or shower, in line with
current electrical regulations.
Where the installation of the appliance will be in an unusual
location, special procedures may be necessary, the current
edition of BS 5546 should be consulted.
In the event that the appliance is to be installed in a timber
framed building, it should be fi tted in accordance with the
British Gas Document ‘Guide for Gas Installations in Timber
Framed Housing’ reference DM2. If in doubt, advice must be
sought from British Gas.
3.8.4 Gas Supply
An adequate sized gas meter must be connected to the service
pipe. Where necessary the local gas supplier will arrange for
the existing meter to be checked or for a suitable meter to be
fi tted.
Installation pipes should be fi tted in accordance with BS 6891.
Pipework from the meter must be of adequate size. Pipes of a
smaller size than the gas connection must not be used.
The complete installation must be tested for gas tightness
(see 4.5) and purged in accordance with the current edition
of BS 6891.
3.8.5 Air Supply
The appliance does not require any purpose provided
ventilation.
3.8.6 Electrical Supply
The appliance must be earthed.
The installation must be undertaken by a competent
electrician and should be in accordance with the current
edition of BS 7671.
Particular attention should be paid to cross bonding.
The appliance must be provided with a means of isolation.
If installed in a bathroom, the means of isolation must be
external to the bathroom or a double pole cord switch fi tted.
Acceptable methods of connection are:
• A switched double pole fused spur with 3mm contact
separation on all poles.
• A double pole switch where the supply must be suitably
fused 3A.
• An unswitched socket outlet complying with BS 1363.
A three core cable should be used and a heat resistant cable of
0.75 mm2 (24 x 0.2 mm) is considered suitable.
3.8.7 Removing the Outer Case
Loosen the screw behind the appliance that secures the outer
case;
Release the two locks on the top of the casing and remove the
case (See
6.1.2.
, page 22).
B.
Hot water outler 1/2”
C.
Gas inlet 3/4”
D.
Cold water inlet1/2”
G.
Drain valve
Cold water inlet fi lter
B
C
D
B
C
D
F
G
