EB-NB Installation Manual

12/28/2018 20 BI804
DISPLAY VARIABLES DEFINED
MULTI-BOILER
BOILER: Enter the role this boiler will play in the heating system.
Options:
 SINGLE: This indicates there are no other Electro Industries Industrial Boilers in this
application. It will not attempt to interface with another boiler that does not exist.
 LEAD: This indicates that there is another Electro Industries Industrial Boiler in this application.
LEAD setting tells this boiler that it is the lead boiler and it is in control of an external boiler. The
LEAD boiler will control all LEAD / LAG sequencing.
 LAG: This indicates that there is another Electro Industries Industrial Boiler in this application.
LAG setting tells this boiler that it is the lag boiler and that another, external boiler is in control of
it. The LAG boiler will only respond to the LEAD boiler LEAD / LAG sequencing.
o Default: SINGLE
LAG BLR DELAY: The function of this setting depends the BOILER setting above.
 SINGLE: If “BOILER” is set to “SINGLE”, the LAG BLR DELAY has no function.
 LEAD: If “BOILER” is set to “LEAD”, LAG BLR DELAY will be the amount of time the
LEAD boiler will wait to active either itself, or the LAG boiler, based on which side of the lead /
lag cycle it is on.
 LAG: If “BOILER” is set to “LAG” the LAG BLR DELAY will act as a redundancy system
protection function. Once there is a demand for heat to the boilers, (R & W switch closure), this
timer will start. If the LAG boiler does not receive a “GO” signal from the LEAD boiler in this
amount of time, an additional 60 minute timer will be started. If this timer expires without getting
the “GO” signal from the LEAD boiler, the LAG boiler will override the LEAD boiler and begin
heating. Should LEAD boiler ever go down, this will prevent the building from freezing.
o It is suggested both the LEAD and LAG boilers have identical values placed in LAG
BLR DELAY.
 Default: 015
NOTE: Display will show an asterisk (*) to indicate status of the “LAG BLR DELAY” timer.