Ariston CLAS HE Series User Manual

13
installation
Gas connection
Make sure, using the labels on the packaging and the data plate
on the appliance itself, that the boiler is in the correct country
and that the gas category for which the boiler was designed
corresponds to one of the categories available in the country
where it will be used.
The gas supply piping must be created and measured out in
compliance with specic legal requirements and in accordance
with the maximum power of the boiler; you should also make sure
that the shut-o valve is the right size and that it is connected
correctly.
Check that the supplied gas corresponds to the type of gas for
which the boiler was designed (see the data plate located on the
appliance itself).
It is also important to check that the pressure of the gas (methane
or LPG) you will be using to feed the boiler is suitable, because if it
is insucient the power may be reduced, causing inconvenience
for the user.
Instructions for opening the casing and performing an
internal inspection
Before performing any work on the boiler, rst disconnect it from
the electrical power supply using the external bipolar switch
removing the fuse and shutting o the gas valve.
To access the inside of the boiler, the following is necessary:
1. Remove the casing by unhooking it from the control panel (a)
2. Loosen the two screws on the front casing (b), pull it forwards
and unhook it from the upper pins (c)
3. Lower the control panel (d)
4. Unhook the two clips on the combustion chamber panel and
lift o (e).
(c)
(b)
Water connection
The illustration shows the connections for the water and gas
attachments of the boiler. See valves conguration on page 13.
Check that the maximum water mains pressure does not exceed 6
bar; if it does, a pressure reducing valve must be installed.
For the measuring of the pipes and of the heating bodies in the
heating system, the residual head value should be calculated as a
function of the requested ow rate, in accordance with the values
shown in the circulation pump graph.
A. Central heating Flow E. Central Heating Return
B. Domestic Hot Water Outlet F. Safety Valve Discharge
C. Gas Inlet H. Drain Valve
D. Domestic Cold Water Inlet I. Drain condensate
(d)
(a)
(e)
A
B
C
D
E
I
H
F

Ariston CLAS HE Series Specifications

General

Efficiency Rating	A
Mounting	Wall-mounted
ERP Rating	A
Warranty	2 years
Fuel Type	Natural Gas