Slant/Fin CHS-399 - Manual (Page 20)

Slant Fin Corp.
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Controller and Display CHS Series
18
2.4.3.2 Lead Lag Slave Config
Figure 2-16 LL Slave Configuration Screen
Lead Lag Slave Config – sub-menu screen, allows
the installer to set the “Slave mode” which establishes
the order in which the boiler is chosen during the
staging sequence of a Lead Lag demand.
Use First – This mode has priority over all others. A
unit with its “Slave mode” set to "Use First", will
always fire first before any other slave in the cascade
and it will be the last one dropped.
Equal run time – This mode stages the units based
on run time equalization where the unit with the least
burner hours fires first and the most burner hours
fires last. Only "Use First" has higher priority.
Use Last – This mode has the lowest priority. A unit
with its “Slave mode” set to "Use Last", will always
fire last after every other slave in the cascade is
running. It will be the last slave to fire and the first
one dropped.
Table 2-11 Lead Lag Slave Configuration Parameters
Parameter Description Factory Settings
Slave mode *
Select slave mode from drop down list:

Use First

Equal run time

Use Last
Equal run time
* Password protected
Slave mode Equal run time
Lead Lag Slave Config