EB-NB Installation Manual

12/28/2018 10 BI804
Display Lines 2, VARIOUS INFORMATION
STAGES
With the system thermostat active, and the system in electric mode, the “STAGES”
indicates how many stages of the electric boiler are active at a given time. The user
can expect to see the stages shift up and down depending on the relationship of ST to
DT
SINGLE / LEAD / LAG
A software setting in the MULTI-BOILER section of the setup menu will be
displayed alongside the stages indicator.
FAULTS
System faults are communicated via line 2 of the OLED display. The below is a run
through of the possible faults.
AUTO HL
There is a mechanical auto resetting high limit located on the top of the boiler tank. This high
limit is in direct contact with the water inside the tank (not a dry well). Should the water in the
tank reach a temperature of 210°F, this limit will open. Should this limit open, all electric
boiler elements will be disabled. (O-210 / C-185)
BENDER
If this boiler has a ground fault bender connected (DELTA transformer only), this fault will
indicate if the bender has detected a ground fault. All electric boiler elements will be disabled
and appropriate fault will be displayed should this condition be detected.
LOW
WATER
Included with this Industrial Boiler is a low water cut off. Should this control system detect a
low water situation, the electric boiler elements will be disabled and the appropriate fault will
be displayed.
EM STOP
Provisions have been made within this Industrial Boiler to allow for a field provided remote
switch or emergency stop. Simply place your field provided switch in series with the EM
STOP circuit located inside this Industrial Boiler. All electric boiler elements will be disabled
and appropriate fault will be displayed should this condition be detected.
MANUAL
HL
There is a mechanical manual high limit located on the top of the tank. This is a surface
mount component measuring vessel temperature. Should the boiler vessel reach a temperature
of 220°F, this limit will open. Should this limit open, all electric boiler elements will be
disabled. This limit will have to be manually reset.
FREEZE
Should the ST (supply sensor) sensor detect a value less than 45° F (7° C), a freeze condition
is declared. All electric boiler elements will remain enabled and appropriate fault will be
displayed should this condition be detected.
Display Lines 3 & 4, TEMPERATURES
ST
ST is short for “Supply Temperature”. This is the temperature of the water as it leaves the Industrial Boiler. If the ST
sensor is not working, the LED will display “BAD” after the ST on the OLED display.
OT
OT is short for “Outdoor Temperature”. This is the outdoor temperature. If the OT was detected upon power-up, and is
no longer working, the OLED will display “BAD” after the OT on the OLED display.
RT
RT is short for “Return Temperature”. This is the temperature of the water as it enters the Industrial Boiler. If the RT
sensor is not working, the OLED will display “BAD” after the RT on the OLED display.
DT
DT is short for “Desired Temperature”. This value will either be the fixed set point or the outdoor reset calibrated set
point.
Display Line 1, MODES
OFF
If there is no active heat call to the Industrial Boiler, the OLED will display a mode of “OFF”. This
means no heat is being generated from the heating system.
EL HEAT ON
Indicates there is a heat call requirement from the system thermostat. The Electric boiler portion of the
heating system is receiving this input, and is actively working to heat the space. The stand by boiler is
not active (if applicable).
SB HEAT ON
Only applicable when a backup fossil fuel boiler is connected to this Industrial Boiler.
Indicates there heat call requirement from the system thermostat. The standby fossil fuel boiler portion
of the heating system is receiving this input, and is actively working to heat the space. The electric
boiler is not active.
FAULT
This indicates one of the system faults has gone active. Display LINE 2 will signify which system fault
has gone active