A.O. Smith BFC-120, Installation, User And Service Manual

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Now set the day and time the same way as described for setting an extra period in
the week menu (see section 4.3.9). In this case however, the pump will be
automatically started.
Select START to start.
9.2.8 Solar heating system configuration
Use the solar heating system settings menu to reach the menus shown here:
9.2.8.1 Setting the drain-back tank
Use this menu to specify whether the solar heating system is equipped with a drain-back
tank for the heating fluid. Call up the menu as follows:
[ ]:SETTINGS SOLAR | DRAIN BACK.
The default is NO.
Note
During commissioning, it is important to check whether this setting corresponds with the
configuration of the solar heating system.
9.2.8.2 Switching on the solar pump
This menu lets you switch on the pump in the solar heating system manually. Call up this
menu as follows:
[ ]: SETTINGS SOLAR | TEST SOLAR PUMP.
The following display appears.
When START is selected, the pump will start to run for two minutes. Once the 2 minutes
have elapsed, the pump stops running again.
9.2.8.3 Setting the solar limit
The solar limit temperature is the maximum water temperature obtained in the appliance
via the solar heating system (measured by sensor T
1
).
This value can be set between 65 and 80 °C. The default value is 65 °C.
If you set the solar limit higher than the set point (see section 4.3.3), then the solar pump
will be started in order to heat the water further once the set point has been reached.
However, this only makes sense if the solar heating system is actually generating heat.
This makes use of the difference between the temperature at the top of the solar collector
(S
1
) and that in the appliance (measured by S
2
).
Call up the menu for the solar limit as follows:
[ ]: SETTINGS SOLAR | SOLAR LIMIT.
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