Thermo Technologies SMT 400 - Manual (Page 6)

2.4 BATTERY
The battery supplied is a PP3 nickel metal hydride rechargeable battery and
is contained in the battery compartment inside the unit, but not connected.
This should be connected after installation. A battery is not essential for the
system operation, but is used in the case of power failure, thereby
maintaining the system clock for 1 - 2 hours. It is recommended for the
battery to be changed every 6 - 12 months, in order to maintain good mains
failure operation. When replacing, ensure that the same type of battery is
used as specified.
2.5 ENERGY COLLECTED CALCULATIONS & SETTINGS
The Flow rate of the system is used to calculate the Energy Collected. A flow
meter is used to determine the actual value of flow rate in Litres per Minute.
This value must then be entered into SMT 400 control unit (see section
3.4 “System presets”) for further information on setting the flow rate and
setting the % of Anti-freeze (Glycol) used in your system. The diagram below
shows the location of the flow meter on the SMT 400 Pump control Unit.
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