Ariston CLAS HE R 12 Installation And Servicing Instructions page 12

installation
The minimum acceptable clearances are shown below:
- A Directly above or below an opening, window, etc
- B Horizontally to an opening, window, etc
- C Below gutters, soils pipes or drain pipes
- D Below eaves
- E From vertical drain pipe or soil pipe
- F From internal or external corner
- G Above ground, roof or balcony level
- H From a surface facing the terminal
- I From a terminal facing a terminal
- J Vertically from a terminal on the same wall
- K Horizontally from an terminal on the same wall
- L Fixed by vertical flue terminal
N : t
ote he flue must Not be iNstalled iN a place likely to
cause a NuisaNce aNd positioNed to eNsure that products
of combustioN do Not discharge across a bouNdary
It may be necessary to protect the terminal with
a guard, if this is the case it will be necessary to
purchase a stainless steel terminal guard. Reference
should be made to the Building Regulations for
guidance.
Ventilation
The room in which the boiler is installed does not
require specific ventilation. If the boiler is installed
in a cupboard or compartment, ventilation is not
required for cooling purposes.
Gas Supply
The gas installation and tightness testing must be
in accordance with the requirements of BS6891.
Ensure that the pipe size is adequate for demand
including other gas appliances on the same supply.
1
300 mm
300 mm
75 mm
00 mm
75 mm
300 mm
300 mm
500 mm
500 mm
1500 mm
300 mm
Electrical Supply
The appliance requires an earthed 30V - 50 Hz
supply and must be in accordance with current
I.E.E. regulations. It must also be possible to be
able to completely isolate the appliance electrically.
Connection should be via a 3 amp double pole
fused isolating switch with contact separation of
at least 3mm on both poles. Alternatively, a fused
3 amp, 3 pin plug and unswitched socket may be
used, provided it is not used in a room containing a
bath or shower, it should only supply the appliance.
Automatic by pass
Ariston recommend that an automatic by pass is
installed a minimum of 1.5 metres away from the
boiler to ensure the minimum required flow rate
is achieved at all times. Additionally the design
of the system and its controls must ensure that
an adequate temperature differential is met, and
should be such to prevent boiler cycling.