Horizon Fitness T-2.5KW Manual page 18

Page 17
When the system starts in manual mode, the system will never return to Standby. The front panel
ON/OFF switch allows the user to manually turn the system on to generate power. And the only
method to stop the unit is by pressing the switch again.
When choose Primary Mode or Manual Mode, press enter to the next interface, then press enter
again to start the system or press up key to reset the system mode.
3) Low Volt Mode
When the system starts in low volt mode, the unit will attempt to achieve an output voltage which
is the value set in the Float Volt field. Once the system has achieved and held float voltage for a
period of time (set in the Float Timer field), the unit will return to Standby. This mode functions as
a battery charge mode, charging up an external battery to the float voltage, and then returning to
Standby. When the batteries discharge to the low voltage threshold, the system will start again.
This charge/discharge method is useful for very small loads, where the battery is properly sized to
support the small load, and is recharged by the fuel cell. The fuel cell system will operate
"thermostatically", turning on at the low voltage threshold, and turning off after holding the
output at the float volt setting until the float timer expires. When primary power is restored to the
site and the bus voltage is held at or above the float volt setting until the float timer expires, the
unit will return to Standby and remain there, provided the bus voltage remains above the low volt
threshold.
Low volt mode is a useful option for off‐grid hybrid systems that are relatively low power. The fuel
cell is used to charge the batteries, and the batteries then carry the load for extended periods. The
total system solution is most efficient for small loads that are <5% of the fuel cell capacity, with an
appropriately sized battery.
When started in low volt mode, the fuel cell will deliver power until the output bus voltage
reaches the user‐set float voltage (whether because the unit has sufficient power to support the
load and charge the batteries, or because the external power was restored). Once the float voltage
is achieved, a user‐adjustable float timer will start. When the float timer expires, the unit will stop
delivering power and return to Standby.
Low Volt Threshold in the user interface is used to set the voltage at which the system begins to
operate when either Low Volt Mode is enabled. This voltage must be at least 0.5V below the value
set in Float Volt.
The low volt threshold range is from 43.2V to 53V (factory default is 48V).
Float Volt in the user interface is used to set the voltage at which the system returns to Standby.
And the range of float volt is from 50V to 57.6V (factory default is 52V).
Float Timer in the User Interface is used to set the timer that determines the end of the float mode.
Float timer can be set from 5 to 120 minutes in 5 minute increments (factory default is 30
minutes).
 Condition setting
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