EZB-Eco Installation Manual

09/01/2020 11 BI601
Staging/Modulating Jumper
The control board on the EZB-Eco 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.
For the EZB-Eco 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.
OPERATIONAL TIPS
Front Panel Monitor Lights
 190°F AUTO RESET LIMIT, red – this will only
illuminate when the vessel hi-limit opens due to
excessive high water temperature. This hi-limit is self-
resetting.
 BOILER POWER, green – basically this is illuminated
at all times. It represents 24-volt power source, good
fuse, controller logic is operational, and a good outlet
sensor. If the outlet sensor is inoperative, incorrectly
wired, or malfunctioning; this green monitor LED
should be pulsing (see Troubleshooting section).
 ELECTRIC MODE, yellow – when illuminated the
system is in the electric mode. If it is not illuminated the
utility load control receiver is in the interrupt or on-peak
mode. If there is an optional or remote standby switch,
the status of the standby switch is also monitored by this
yellow LED.
 THERMOSTAT CALL, red – indicates a remote
switch closure (thermostat or zoning end switch) is
closed between terminals R and W.
Inside Control Board Monitor Lights
STAGES, red – these four LED’s indicate which electric element stages are on and active.