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6.3 Safety devices
Safety devices of the water heater:
Gas control valve
Thermocouple
T.R.S.
Thermal Reflux Safeguard
Safety devices of the installation:
Inlet security group
Pressure-reducing valve
T&P valve
Temperature and pressure
relief valve
(1)
1- All appliances have a T&P valve connection. A.O. Smith recommends to use a T&P valve.
6.4 Environmental aspects
6.4.1 Recycling
The packaging material is environmentally
friendly, recyclable and relatively easy to discard.
0313126_BTL_UKUK_V1.1, 30-11-2018
The gas control valve controls the gas supply to the
burners and to the pilot burner.
The thermocouple detects the presence of a pilot flame.
When the pilot flame extinguishes, the gas supply is
closed.
The T.R.S. detects the presence of returning flue gases on
the draught diverter. The T.R.S. detects an increase of
temperature in the edge of the draft diverter. When the
temperature becomes too high, the gas supply is closed.
The inlet security group is the combination of the stop
valve, a non return valve and a pressure relief valve. The
inlet security group prevents excessive pressure in the
tank and back flow of expansion water into the cold water
main supply.
The pressure-reducing valve reduces the water mains
pressure, if necessary.
The T&P valve is a temperature and pressure relief valve
which is activated when:
-
the temperature exceeds 97°C.
the pressure exceeds 7 bar.
-
6.4.2 Disposal
Old end-of-life appliances contain materials that
need to be recycled. When you discard devices at
the end of their service life, you must obey local
legislation related to waste disposal.
Never discard your old device together with
regular waste. Put the device into a municipal
waste collection depot for electrical and
electronic equipment. If necessary, ask your
supplier or your service and maintenance
engineer for advice.
11
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