9
H3699 Rev. L
Thermann Owner’s Manual
thermann 25/50 Litre Water Heater
Safety Information
Warning
For safe performance, this water
heater is fitted with:
1. Combination thermostat and
over-temperature Energy Cut-out.
2. Combination Pressure &
temperature Relief Valve.
these devices must not be tampered
with or removed.
the water heater must not be operated
unless each of these devices is fitted
and in working order.
The element cover should be removed
only by licensed tradespeople.
the electrical power supply switch
must be turned off and the fuse
removed or the circuit breaker
isolated at the main electrical supply
switchboard before the water heater
electrical cover is removed.
open the PtR Valve for approximately
10 seconds by lifting the lever on the
valve to ensure water is relieved to
waste through the relief drain pipe.
Lower lever gently and check that it
closes correctly.
the PtR Valve must not be tampered
with or removed. the water heater
must not be operated unless this valve
is fitted and in working order.
the PtR Valve should be checked for
adequate performance or replaced at
intervals not exceeding 5 years, or less
in areas where local regulations apply.
Important
the PtR Valve and its drain outlet
pipe must not be sealed or blocked.
It is normal for the PtR valve to leak a
small amount of water during heating
cycles.
Danger
Failure to operate the relief valve
easing lever at least once every six (6)
months may result in a problem with
the water heater and in some cases
the tank may explode.
