ATI BT22 Série Manuel D'utilisation page 9

UK – pag. 3/4
bottom (FIG_7-2).
It is possible to install the appliance also on tilted walls (FIG_7-3). Also in this case the heat exchanger and/or the electric
heating element have to be placed at the bottom.
The appliance can be installed in any space, with no restraint to its conditions. What above exposed does not exempt from
respecting the instructions given in the paragraph "IMPORTANT PRECAUTIONS", at the beginning of this booklet.
For any other installation which might not be contemplated in this manual, contact our technical office.
8. PLUMBING AND QUALITY OF WATER
To extend the working life of the appliance the quality of the water must be within the following parameters, in accordance
with the European Directive 98/83/CE (about the quality of water destined to human consumption):

hardness between 15 and 50 °F (in particular where water is subject to a softening or desalination treatment)

chlorides between 25 and 100 mg / l

PH between 6,5 and 9,5
conductivity between 400 and 1500 μS/cm

Connect the appliance in accordance with the following instructions (FIG_8-1):
1. cold water inlet ( 1/2 ")
2. hot water outlet ( 1/2 ")
3. engine cooling water inlet (1/2")
4. engine cooling water outlet (1/2")
Minimum inlet pressure of water: 70 kpa.
It is suggested to insulate the hot water pipeline: useless waste of energy will thus be prevented.
Installation of the pressure relief and non-return valve: the valve is factory supplied with the appliance but it is not installed.
Therefore it is necessary to fit it to the cold water inlet when installing the appliance. (S-- FIG_8-1 ).
WARNING:
 DO NOT REPLACE THE SAFETY AND NON-RETURN VALVE SUPPLIED WITH THE UNIT WITH A
SIMPLE NON-RETURN VALVE.
 CONNECT THE DRAIN OF THE VALVE TO A RUBBER HOSE HAVING AN INTERNAL DIAMETER OF 9.5
MM. THIS DRAIN HOSE HAS TO BE INSTALLED WITH A CONSTANT DOWNWARD SLOPE AND
PROTECTED AGAINST ICE.
 DURING WINTERTIME, WHEN THE WATER HEATER IS NOT IN USE IT HAVE TO BE DRAINED. THIS IS
TO AVOID SERIOUS DAMAGE CAUSED BY FREEZING.
9. WIRING
The unit must be connected to a single-phase power supply (please be sure to connect the correct voltage: 120 V or 230 V
according to the data label on the unit) and to an efficient ground wire.
THE MANUFACTURER DENIES ANY RESPONSIBILITY FOR DAMAGES OR INJURIES RESULTING FROM
THE FAILURE TO EARTH THE APPLIANCE
The unit is supplied with a power cable with Schuko plug. Connect the power cable in accordance with the wiring rules in
force in the country where the appliance is installed. When replacing the power cable, use only a cable with the same
characteristics (H05 VV-F - 3x1, 5 mmq). In the event that the Schuko plug is not needed, cut the power cable and connect it
into a different plug or directly to the power connection. Please be sure to connect the polarity correctly (FIG_9-1):
• L -> phase (brown wire)
• N -> neutral (blue wire)
Foresee a two-way switch next to the appliance to allow the isolation of the appliance.
WARNING: BEFORE WORKING ON THE THERMOSTAT, MAKE SURE THE POWER IS COMPLETELY
DISCONNECTED.
10. INSTRUCTIONS FOR USE
The electrical heating element is equipped with a thermostat that has the following two functions:
1. Adjustable thermostat (T - FIG_9-1), cutting off the power to the electrical heating element when the set temperature
is reached (the temperature can be adjusted between 0 ° C and 65 ° C, according to the user's needs).
2. Safety thermostat, cutting off the power to the electrical heating element when the temperature of the water reaches
90 ° C. A manual intervention is necessary to restart the appliance (manual reset). In this case, follow these steps:
a) disconnect the power supply
b) remove the protection cap of the heating element
c) press the reset button located on the thermostat (R - FIG_9-1)
2-210-0335_libretto_BT_2016-02_testo_UK.docx