Thermal Protections; Disinfection Weekly Cycle; Electrical Heater - Olimpia splendid SHERPA SHW S1 200 Manual Del Usuario

11.4.4 Thermal protections

First step protection: when the tank water goes up to 85°C, the unit will stop and the relating error code will be shown on the
controller. This is an auto-reset protection. When tank water temperature goes down, the unit can start again.
Second step protection: when the tank water keeps going up and reaches 90°C, the manual reset cut-off will be active, the
electrical heater stops, unless you manual reset the protector.
To manual reset the protector, remove the frontal plastic cover and press the reset red button on the thermostat.

11.4.5 Disinfection weekly cycle

The unit is programmed to activate a weekly anti-Legionella cycle for a period of 30 minutes that brings the tank water to 70°C.
This system allows to reduce the risk due to bacteria that causes various diseases, commonly known as "Legionella". It 's
recommended to read this paragraph and to ask explanations to your installer/plant designer in order to be properly informed
about the risk of spreading this disease. We strongly advised you to read the "Guidelines for prevention and control of
legionnaires' disease - Approved in the State-Regions Conference of May 7, 2015- Italy and subsequent amendments, which must
be taken as a reference for designing the plant.
The operation of the disinfection cycle is as follows:
The heater will start each week at the setting time (parameter 13) automatically, regardless if the machine is ON or in standby
mode (i.e. the unit is off but remains connected to the power supply)
When upper tank temperature T3 ≥ TS3 (parameter 4), the heater stops. When T3≤TS3-2°C, the heater starts.
The water temperature T3 is kept in range TS3-2°C to TS3 for the set disinfection time t2 (parameter 5), then the unit quits the
disinfection.
When parameter 5 (t2) is set to 0, the disinfection function is disabled.
The logic starts to calculate t2 only when T3 has reached TS3.
It's possible to set the interval between the disinfection cycles (parameter 21).
If the unit is "OFF"(and also if ON/OFF contact is opened), the disinfection starts with the same logic of "ON" unit.
If the unit is disconnected from the power supply, the disinfection cycle will not occure. If the unit is left without
power supply for longtime, DO NOT use the water contained inside. It is recommended to emplty the tank and the
water contained inside the pipes of the DHW system. It is also recommended that you let the water flowing for
enough time across the pipes not only for renewing all the water but also for washing the pipes themselves. This
required "washing" time is inversely proportional to the temperature of the water flowing in the pipes.
After cleaning and renewing all the water contained inside the unit and in the pipes of the system, you should
proceed with a disinfection.
The disinfection cycle occurs only inside the water tank. Therefore, it's recommended to perform a recirculation of
the water system especially for disinfecting all the contained water. If cannot be possible, according to the
preceding warning, it is recommended to let the water system to flow for a enough for cleaning the pipes and
renewing the water.
If the parameter 5 (t2) is set to be 0, the disinfection function is disabled. Such operation is strictly
unrecommended; the manufacturer declines any responsibility for the data caused by a lack or incorrect unit
disinfection. If you desire to disable the disinfection cycle, you should ask the maintainer about the consequences
that may arise from this operation
It is strictly forbiden to change the default value of parameter 4. The parameters 4 and 5 control the anti-
legionella cycle (temperature versus time). We recommend to respect the above guidelines, if you want to change
them. Please remember that to keep the temperature of the tank water between 55-60°C in order to inhibit the
bacterial proliferation (see Annex 13 of the guidelines mentioned above).
The parameter 21 acts on the frequency of disinfection cycles. It must be properly set according to the storage
temperature of the tank and the frequencies of DHW utilization. Higher frequency of the disinfection cycle, results
in a lower possibilities of bacteria contact.
The stagnant water allows Legionella bacteria to grow. For this reason it is necessary to properly valuate the
frequency of the disinfection cycle according to its own uses.
The plant designer must keep in mind the legionella risk and should adopt all the measures for prevention and
control of water.
The user is RESPONSIBLE to periodically check the correct operation of the anti-legionella cycle and to verify that
during the disinfection, the setting temperature parameter is put to be 4 and is reached for the duration indicated
by the parameter 5.

11.4.6 Electrical heater

E-heater turned ON or OFF condition 1:
(when the unit is turned on, and the E-heater button on the control panel hasn't been turned on manually)
1. ON: when the tank water setting temperature TS1 (parameter 0) is bigger than the working limit that is expressed in
Paragraph 16, the lower tank temperature T2 has reached this limit and the upper tank temperature T3 ≤ TS1-3°C;
OFF: when the upper tank temperature T3 reaches the setting temperature TS1+1°C.
2. ON：when the ambient temperature ≤ -10°C or > 44°C;
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