Ace Heating Solutions Atlas A050 Operating And Maintenance Manual page 63

20 mA water temperature
Outdoor reset
Table 4.21 – Lead Lag Advanced Setting: CH Parameters
Parameter
Priority source
Priority method
DHW priority override time
Table 4.22 – Lead Lag Advanced Setting: DHW Parameters
Parameter
Enable
Outdoor setpoint
Frost protection rate
Table 4.23 – Lead Lag Advanced Setting: Frost Protection Parameters
Parameter
Enable
Setpoint
Table 4.24 – Lead Lag Advanced Setting: Warm Weather Shutdown Parameters
Parameter
Lead selection method
Lag selection method
Lead rotation time
Forced rotation time
Table 4.25 – Lead Lag Advanced Setting: Algorithms Parameters
Parameter
Base load common
-40 to 266F (-40 to 130C)
This parameter provides the temperature for the
interpolation of 4-20mA curve. This value determines the
maximum possible value for the setpoint.
Enable or disable
This parameter enables or disables the lead lag master
outdoor reset operation.
Comment
DHW heat demand
Disabled
Boost during priority time
Drop after priority time
If this parameter is non-zero then a DHW demand will
shift its priority vs. other demand sources according to
the specified time. The priority override timing is reset
when demand from the DHW source turns off.
Comment
Enabled or disabled
Allows use of frost protection
-40 to 266F (-40 to 130C)
The outdoor temperature setpoint frost protection
%
When Frost protection is enabled then for this parameter
0% or any value less than the boilers minimum firing rate
represents the boilers minimum firing rate. 100%
represents 100% firing of the boiler.
Comment
Enabled or disabled
Allows use of warm weather shutdown.
-40 to 266F (-40 to 130C)
If outside temperature is greater than warm weather
shutdown setpoint then it will cause the CH demand to
end. If there is no outside temperature then WWSD is
disabled.
Comment
Sequence order: Lead boiler is ordered according to
their LL – Slave sequence order or Modbus address if
this value is zero.
Measured run time: Lead boiler is ordered according to
their reported run time. If two have the same measured
run time, then either may be used.
Sequence order: Lag boilers are ordered according to
their LL – Slave sequence order or Modbus address if
this value is zero.
Measured run time: Lag boilers are ordered according
to their reported run time. If two have the same
measured run time, then either may be used.
If this parameter is a non-zero time, then it is used to
trigger the rotation of lead boiler.
If this parameter is a non-zero time, then it is used to
force the rotation of lead boiler if it stays on longer than
the time specified.
Comment
%
If set to zero, this parameter is disabled. For any non-
zero value, individual base load rates of each slave to be
ignored by the LL master's routines and this common
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