Lochinvar 000 through 2 - Manual (Page 43)

43
FIG. 56g Command Display Data Screen
STATUS POINTS
In the screen display for a specific boiler or water heater, there will
be a Status indication. The status point details the operational mode
of the appliance or in the event of a control sensed failure, a status
point alarm. The status point alarm mode indicates the reason for
the control sensed shut down of the appliance.
POWER-UP AND NAVIGATION
BETWEEN THE SCREENS OF
THE COMMAND DISPLAY
The first screen is viewable on the Command Display as it is
powered up. This Command Display screen gives the current
software version running on the Excel 10. This screen goes away
after 60 seconds. The amount of time until this screen changes is
displayed on the bottom left of the screen in a numeric count. After
the 60 seconds expires or when the user presses any key during this
interval, the next screen is dis played. This feature is used for
perform ing factory tests.
After power-up, the Command Display starts acquiring data from
the Excel 10. The following screens display the status of the bytes
of data received from the Excel 10. After receiving all the data
bytes, the Command Display shows the Heat Source(s) and the
pres ence of an Optional Sequencer, if equipped. Note that the Heat
Source names can vary but typically they may be Boiler #01 up to
Boiler #16 or WtrHtr #01 up to WtrHtr #16, based on the
application. At the time an order is placed, the owner may specify
a unique name for each appliance if desired. Pressing the Configure
softkey will take you to the System Configure screen with two
active softkeys. The Setup softkey will take you to a screen which
allows you to setup the display in the screen. The Password softkey
will take you to the password screen to set the three levels of
password required to access the various functions of the Excel 10.
TABLE - U
Status Point Operational Modes:
Self Test: Excel 10 self test period, approximately 5 seconds during power up of Excel 10.
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Standby: There is no call for heat and the boiler is waiting for a call for heat.
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H2OFlow OK: Checking operation of flow switch to verify water flow from the pump.
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Air Press OK: Low air switch verifies operation of combustion air blower.
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Drain OK: Verifies that the condensate drain flow to the optional Condensate Management System is not
blocked.
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GasPress OK: Verifies gas pressure at optional switch(es) - high and/or low.
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PrePurge: Pre purge operation of combustion air blower.
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HSI OK: Hot Surface Igniter On.
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Burner ON: Burner On.
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Heating: Temperature is beginning to rise.
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PostPurge: Post purge combustion blower operation after a call for heat sequence.