For The User; Instructions For Use; Filling The Device; Putting Into Operation - A.O. Smith DRE 52 Installation And User Instructioins

3. FOR THE USER

3.1

Instructions for Use

Warnings
The installation and commissioning shall
be done by a recognised installer.
Always make the device free of
voltage before opening the door. Have
maintenance and fault rectifi cation
carried out by authorised personnel.
Never work on the device while feed
voltage is still present.
The device may not be operated by
people (including children) with limited
psychological and/or mental abilities,
lack of experience and knowledge
unless they have received agreement
or instruction from a person who is held
responsible for their safety.
From the point of view of safety it must
be ensured that children do not play with
the device.

3.1.1 Filling the Device

Method of working:
1. Check whether the drain valve is
closed.
2. Open cold water valve to the boiler and
open all valves at hot water drainage
points for bleeding. The device is fi lled
as soon as cold water fl ows at all
drainage points.
3. Reclose all valves at hot water drainage
points.

3.1.2 Putting into operation

Method of working:
1. Check whether the device is fi lled
with water.
2. Switch the mains switch on for
a fi xed connection or place the
connector in the stop contact.

3.1.3 Use

The device is under water pipe pressure
(maximum 8 bar (=800 kPa)). As
much cold water is fed is as hot water
consumed. The regulating thermostat
switches the electrical feed automatically.
This means that if the temperature
rises above the desired temperature,
the circuit is closed and heat is fed to
the water. The circuit is broken once
again when the desired temperature is
reached.
Changing the set temperature is an
operation which must be carried out by a
recognised installer. For this purpose the
device must be made completely voltage
free before the access door to the
regulating thermostats may be opened.
Temperature in °F
120
130
140
150
160
170
180
In connection with limiting scaling it is
recommended to set the temperature
at 60°C. A maximum thermostat is also
installed which interrupts the circuit fully
at a water temperature of 93°C. This
thermostat can be reset again once the
temperature of the water has dropped
by 20°C. If the maximum thermostat
intervenes again the regulating
thermostat must be set to a lower
temperature.
Temperature in °C
49
54
60
66
71
77
82
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