EFD MINAC 25 Twin User Manual page 33

MINAC Systems
USER MANUAL
63860.doc
Energy Supervision
The energy supervision function enables the operator to detect changes in the
heating process when running the sequence function. Once a perfect sequence
program has been established, store the total energy value of the run and enter an
allowed percentage energy deviation value. The energy consumption of the following
runs (of the same program no.) will be compared with the stored value. If the current
value is within the allowed deviation, "OK" or a
Sequence/Timer Menu. If it is not within the allowed deviation, "LOW/HIGH" or a
is shown.
For further information, refer to paragraph 5.2.7. The energy supervision function is
activated/deactivated in the Activate Menu.
PIN Code
The PIN code function provides a security option for system programming. The
function is described in paragraph 5.2.2.
Extended Operating Range
The extended operating range (EOR) function enables the unit to operate outside the
normal ratings for cooling water flow and temperature. When this function is
activated, the output is reduced/limited, according to the water's cooling capacity, if
necessary to protect the unit. The alarm level for low water flow is reduced and the
alarm level for over temperature is increased
If this function is activated, a footer message flashes, alternating with the normal
message. If output power is reduced/limited by this function 'Output reduced by
EOR' is shown in the footer message. For further information, refer to paragraph
5.1.1. The EOR function is activated/deactivated in the Activate Menu.
The EOR function must be used with great care. Because
the output power can vary with variations in the cooling
water supply, repeatability can not be guaranteed.
Select Ext. interface (optional)
This function is only available on units specially equipped with both hardwired
external plug and a fieldbus connection. By setting this function to 'Hardwired' all
external control input to the unit must come from the hardwired external plug. By
setting it to 'Fieldbus 1' all external control input to the unit must come from the
fieldbus connection. Both external connections will however provide information out
regardless of the selected function.
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Refer to specifications for details on water flow alarm level and over temperature alarm level when
EOR is activated, as this is equipment dependent.
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Revision A
31 January 2005
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