A.O. Smith SGS-28, Installation, User And Service Manual

Page: 88 / 126

Please refer to the table for the adjustment range and default value for each appliance.
9.2.8.4 Setting the solar difference
The solar difference is a value that influences how the operating cycle of the water heater
proceeds. Call up the menu as follows:
[ ]: SETTINGS SOLAR | SOLAR DIFFERENCE.
Please refer to the table for the regulation interval and default value for each water heater.
9.2.8.5 Setting the Q/T sensor
The energy contribution of the solar heating system can be calculated (see section
9.2.8.6) using the Q/T sensor. This calculation is only possible if your installation is
equipped with such a Q/T sensor. If this is the case, then you must set this value to YES,
otherwise NO. Call up the corresponding menu as follows:
[ ]: SETTINGS SOLAR | Q/T SENSOR.
9.2.8.6 Displaying contribution
This option enables you to read out how much energy the solar heating system supplies.
For this data to be displayed, the installation must be equipped with a Q/T sensor (see
section 9.2.8.5).
Three values are reported on the display:
ACTUAL, actual energy: the amount of energy currently being supplied.
LAST 24hr, energy supplied over last 24 hours.
TOTAL, total energy supplied since day 1.
Call up this menu as follows:
[ ]: SETTINGS SOLAR | CONTRIBUTION.
9.2.8.7 Displaying temperatures
This option lets you read what the solar heating system's sensors are recording. Two
values are reported on the display:
S1, temperature in the collector.
S2, temperature between the inlet and outlet of the heat exchanger in the tank.
S3, temperature at top of the storage tank.
Call up this menu as follows:
[ ]: SETTINGS SOLAR | TEMPERATURES.
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88 Installation, Maintenance and Service part