STIEBEL ELTRON Accelera 300 - Risk of damage through corrosion; Install a 70 psi pressure reducing valve; 10.7.1 Safety valve (on-site provision); 10.7.2 P&T valve (on-site provision)

22 | ACCELERA 300 WWW.STIEBEL-ELTRON-USA.COM
INSTALLATION
INSTALLATION
» After connecting the plumbing, connect the
protective caps so that the sheet steel casing of
the water heater grips into the outer groove of the
protective cap.
Risk of damage through corrosion
To protect against the risk of corrosion, make
the connection with flat gaskets.
» Insulate the hot water line against heat loss.
» Install a drain valve at the lowest point of the cold
water supply.
Install a 70 psi pressure reducing valve on the cold water
inlet.
Accurately maintain the order of fittings on the cold
water side (see diagram 10.7).
10.7.1 Safety valve (on-site provision)
This water heater is a sealed unit. A 100 psi, 210 °F P&T
relief valve must be installed.
When installing the P&T valve, observe the following:
- Size the drain line so that water can drain off
completely, even if the safety valve is fully open.
- The drain outlet must not be able to be closed and
must always remain open to atmosphere.
- The P&T valve must open at a pressure of 100 psi
and be 3/4" pipe thread.
10.7.2 P&T valve (on-site provision)
WARNING Risk of injury through excessive
pressure and temperatures.
Install safety equipment that meets the
applicable regulations for the installation
locations. In any case install a "Pressure
and Temperature Relief valve (P&T relief)"
that complies with the requirements of the
ANSIZ21.22 ("Requirements for Relief Valves
and Automatic Gas Shut-off Water heaters for
Hot Water Supply Systems").
The P&T valve must respond at a pressure of
100 psi (0.7MPa). Fit the P&Tvalve into the
opening on the circumference of the water
heater indicated.
Ensure that any expelled water cannot come
into contact with 'live' parts and will not run
onto sensitive surfaces. Ensure that the P&T
valve outlet remains free at all times.
10.8 Power supply: 240 V / 15 A double pole
circuit breaker
The electrical connection must be carried out by a
qualified electrician.
DANGER Electric shock
Contacting 'live' components results in a risk
to life.
» Disconnect the water heater from the power
supply before carrying out work on the
control panel.
» Be sure that no one can reconnect the
power while you are working.
When making a connection use code compliant
disconnects.
» Undo the screws and remove the water heater
cover.