Putting Into Operation; Filling Of The Heater; Putting Out Of Operation; Temperature Control - A.O. Smith EES 30 Installation, User And Service Manual

2.3

Putting into operation

2.3.1

Filling of the heater

1. Install the drain tap and check whether it is
closed.
2. Open the cold water tap leading to the
heater and the rest of the taps of warm
water outlet, for ventilation. The
apparatus will be filled, as soon as water
is flowing out of every outlet.
3. Again, turn off all the taps of warm water
outlets.
2.3.2 Putting into operation
1. Check, whether the heater is filled with
water and whether all electric connections
leading to it are actually well carried out.
2. Check whether the cold water inlet is
open.
3. Open the covering plate at the front
remove the insulation to be found
thereunder. Now, the regulating
thermostats will be accessible. And can
subsequently be adjusted at the
demanded temperature, by turning the
selector switch by a screwdriver.
4. Set the demanded temperature, on the
regulating thermostat (see table). The
temperature adjusted ex works is of
60°C.
Temperature in °F
90
100
110
120
130
140
150
5. Replace the insulation and put back the
covering plate.
6. With a fixed connection, switch on the
main switch or, otherwise, put the plug
into the socket. Thereon, the apparatus
Temperature in °C
32
38
43
49
54
60
66
will be in operation and start to work,
automatically.
2.3.3

Putting out of operation

1. For short periods: Remove the plug from
the sockey or, if the connection is fixed,
switch off the main switch.
2. For longer periods, it will be
recommendable to not only act according
to the advises sub 1, but also shut of the
water supply pipe and, as soon as the
heater will be cooled off, let out the water
(fitting an outlet pipe on the drain tap and
open it), in view of the danger of frost.
(Open the nearest warm water drain taps,
as well, so that the tank can be
ventilated). Whenever the heater will
have to be emptied completely, detach it
and let it slope in the direction of the
drain tap.
2.3.4

Temperature control

The apparatus is under the pressure of the
water supply (max. 8 bar). There will be
supplied the same quantity of cold water as
the one used up of hot water. This implies
that in the moment of showing the thermostat a
temperature being inferior to the set one, the
electric circuit will be closed, making an
electric current pass through the heating
element. After having reached the demanded
temperature, the thermostat will interrupt the
contact again. High water temperature will
involve a calcium precipitation, inside
the heater. Therefore, it is recommended to
maintain the adjusted temperature of 60 °C, so
that less furring will occur. Moreover, a built in
safety thermostat will completely interrupt the
current supply, at a water temperature of 95 °C.
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