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5833 275 - 04
Vitotrans 300 Installation, Operating and Service
Installation
Sanitation Function
Sanitation function
– When the ‘Tank
Sanitation Mode’ is set to ‘ON’, the
start time and temperature setpoint hours
will appear on the display. The Vitotrans
300 will perform a sanitation cycle for the
external tank once per day at the selected
time. Each cycle will increase the external
tank temperature above the DHW setpoint
to the sanitation function setpoint.
The cycle will end once the setpoint has
been reached or 1 hour has elapsed,
whichever comes first.
WARNING
Domestic hot water temperatures over 125°F (52°C) can
cause severe burns instantly or loss of life from scalds.
Children, disabled and elderly are at highest risk of being
scalded. Feel water before bathing or showering.
Temperature limiting valves are available and must be used
where domestic hot water temperatures exceed 140°F
(60°C).
Sanitation Time
– This allows the selection of what time
each day the sanitation function will start. The adjustable
time slider selects the desired start time with 0 = 12:00 AM
and 23 = 11:00 PM. Choose a time of day where the DHW
draw from the external tank is expected to be minimal.
Sanitation Temperature
– This is a temporary DHW tank
setpoint during the sanitation cycle. It can be set from
140ºF to 190ºF (60ºC to 88ºC). Once the sanitation
cycle is complete, the tank temperature will return to
the DHW setpoint temperature.
For proper operation the system supply temperature
must be at least 20ºF (11ºC) higher then the sanitation
setpoint temperature.
