TSBC Instruction Manual Page 14 of 48
Product Features
Manual Boiler Control Mode
Display Shows: Manual Operation Mode and Lost Sensor Blind Mode
RJ
11
,
RS
-
485
Communication
Modbus Network
EMS Monitoring
EMS System Hardwired Connection
Lockout Indicator
(
LO
)
Soft Alarm
(
SO
)
Remote On
/
Off
(
Enable
) (
RO
)
Boiler Outlet
Temperature
( BO , BC )
Boiler Inlet
Temperature
( BI , BC )
Return
Water
Boiler
Circulator
System
Circulator
System
Supply Water
ALAR M
POWER
Manual Operation Mode and Lost Sensor Blind Mode Application Diagram
(Showing relevant connections)
MANUAL OPERATION MODE
Features
Modulation Rate Control
The operator sets the modulation rate. The setpoint is
ignored.
Call for Heat
The Call For Heat Relay (CH) is directly controlled by
the operator. The on and off points are ignored. The
boiler will turn off if the water temperature increases
past the temperature set on the High Temperature
Stop parameter.
Options
Outside Air Reset, Warm Weather Shutdown and
Domestic Hot Water Priority are ignored.
The Spare Output (VI) and Combustion Air Damper
(SO) outputs are energized when the operator starts
the boiler in manual mode.
Selecting This Control Mode
Manual Mode is activated from the Manual Mode
menu when Supervisor password is entered. Simply
set the Boiler Man/Auto parameter to “Man” and adjust
the Modulation Rate and Boiler On/Off menu items as
required. Once activated the green LED flashes. To
leave manual mode set the Boiler Man/Auto parameter
to “Auto”.
LOST SENSOR BLIND MODE
If both Remote System Temperature (RST) and boiler outlet
temperature and the Remote Control input signal (C,-C+) have
failed, the boiler is started and run continuously at the lowest
modulation rate.
If the controller has entered Lost Sensor Blind Mode, the user
may switch the boiler into manual mode or repair, replace or
reconnect required temperature sensors.
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