EB-M Installation Manual

04/15/2019 12 BI518
Staging/Modulating Jumper
The control board on the Midsize Series boiler is a universal controller with the capability of interfacing
with many different models of TS Electro-Boilers.
The correct setting of this jumper is determined on the model of the boiler you are
working with.
If you are working with an EB-MS-**, this should be set to STAGING.
If you are working with an EB-MX-**, this should be set to MODULATE.
Circulator pump mode – as factory set, the circulator pump is controlled directly from the W input
terminal. In this setup the circulator pump continues during load control interrupt (or optional remote
standby switch). There is a provision within the controller board (inside) to allow the circulator pump to
not operate during load control interrupt.
On the inside control board, just above the two
bottom terminal blocks, is a small pin jumper
arrangement. The black jumper sets up the pump
mode. Just below this pin jumper arrangement are L
and W lettering. When the two pin shorting device
is in the W position, the pump is a direct function of
R to W input. When the two pin jumper is in the L
position, the pump is interrupted during a load
control.
WARNING
THIS SHORTING DEVICE MUST BE IN ONE OF THE TWO POSITIONS FOR THE CIRCULATOR
PUMP TO PROPERLY OPERATE.