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SAFETY
THERMAL DISINFECTION – LEGIONELLA PROTECTION
THE LEGIONELLA PROCEDURE:
The procedure must be activated in the parameter
menu.
If the legionella procedure is activated, the
legionella sequence will start immediately.
If the legionella procedure is deactivated, the
legionella sequence will stop immediately.
If activated a new "legionella protection" cycle starts
automatically after 7 days (168 hours) +-2%. The
function will be deactivated at power cut.
In order to protect your installation against "legionella" or other bacteria, the water temperature goes up to 62°C
by means of the HP and the supplementary additional heating. At 62°C the device switches to the "supplementary heating
only mode" to heat further up to 65°C. This temperature is maintained for 1 hour before it will switch back to normal
operating mode. The "legionella protection cycle" is limited to 12 hours. If the legionella temperature is not reached*, an
alarm will be displayed. The alarm will disappear automatically after the next successful legionella sequence or be reset on
user acknowledgement.
* If the air temperature is too low and/or the DHW energy requirement during the "legionella protection" cycle is higher
than the needed output for the "legionella-protection" procedure.
SAFETY VALVE, CONTRA VALVE, CONDENSATION DRAIN – The installer:
The DHW HP tank must be protected by a new safety valve and a contra valve on the cold water side. This is to protect the
DHW tank against excessive pressure (due to the expansion of hot water and pressure shocks) and leaking. The safety valve
overflow has to be connected to the floor drain. The contra valve in the security group prevents the backflow of warm water
to cold water supply. Depending on the input air humidity, the evaporator generates a certain quantity of condensing water.
The condensing water container must be fitted to the drain. Concerning the specifications of pipe connections - please see
dimensional sketch "page 7 – Design & Dimensions"
SAFETY VALVE, CONTRA VALVE – The user:
Your installer has fitted a new safety group. This is to protect the DHW tank against excessive pressure (due to the
expansion of hot water and pressure shocks) and leaking. The functioning of the safety group: While the cold water in the
DHW tank is heated up, the water volume expands and the pressure inside the tank increases. If the pre-set pressure level of
the security group is met, the security valve opens and releases excess water (= pressure) to the drain. This water release and
even permanent releases in form of dropping, is absolutely normal and demonstrates that the security group is working. The
user is responsible for the maintenance of the safety valve, and has to check
regularly (4-5 times a year), whether it is operational. This is done by pressing or
turning the spring loaded button on the valve and then to watch and hear, if water is
drained.. Damages due to a blocked safety valve are not covered by the
manufacturer's warranty.
SCALDING SAFETY:
Under normal operation conditions scalding hazard can be excluded. Scalding
hazard might occur, when using the electric supplementary heater (water can get up
to 90°C) and if there is a failure of the thermostat built into the electric heating
element. In this case the electric heater might heat the DHW up to approx. 95° C -
98°C, before the safety thermostat is triggered. To avoid scalding hazard you can
build in a thermostatic mixing valve on the hot water side in order to have a pre-set
maximum temperature for the complete DHW installation. The water temperature
will usually not exceed than 65°C, when these kinds of valves are installed.
Reprezentant unic in Romania - airguru.ro
L e g io n e ll a p r e v e n t io n
7 0
6 0
5 0
4 0
3 0
2 0
1 0
0
1
4
7
1 0
1 3
1 6
1 9
T i m e
W a t e r t e m p e r a t u r e
N o r m a l s e t p u n k t
A d d i t i o n a l h e a t i n g
BREEZE HVAC SRL
2 2
2 5
2 8
3 1
3 4
3 7
4 0
4 3
L e g i o n e l l a s e t p u n k t
H e a t p u m p
THERMOSTATIC
MIXING VALVE
HOT WATER
OUTLET
HOT WATER TANK
956119
4 6
4 9
5 2
5 5
COLD WATER
INLET
17
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