TSBC Instruction Manual Page 29 of 48
Configuration & Tuning
System Configuration Menu
No. Range / Choices Parameter and Description
20
Off
Isolated Demand
Shared Demand
DHWP
Enables Domestic Hot Water Priority (DHWP) control feature. When input
(DP) is energized DHWP becomes active as selected:
Off No DHWP.
Isolated Demand Boiler that receives the input (DP) drops off the
Peer-To-Peer network and it’s temperature setpoint
is adjusted above the DHWP Setpoint. The PID
output is based on boiler outlet temperature and
setpoint. If Remote SP or Remote System
temperature sensors were selected, control is
switched to the Boiler Outlet Sensor.
Shared Demand If the lead boiler receives the input (DP) the
temperature setpoint for all boilers on the Peer-To-
Peer network is adjusted above the DHWP Setpoint.
21
No
Remote SP
Modbus SP
Remote Mod
Modbus Mod
Remote Control
Sets the remote (Energy Management System) control mode as follows:
No: Local setpoint and modulation rate is used.
Modbus and remote input (C+,C-) are ignored.
Remote SP: Remote Input (C+, C-) is used as the temperature
setpoint. Parameter 22 & 23 may be used to adjust
the signal range.
Modbus SP: RS485 Modbus (40006) is used as the
temperature setpoint.
Remote Mod: Remote Input (C+, C-) is used as the modulation
rate.
Modbus Mod: RS485 Modbus (40006) is used as the modulation
rate.
22 60 F to 140 F
Remote 1.0 Volt=
Sets the temperature corresponding to input (C+,C-) 1Volts. Voltage below
1V is considered invalid, (failed or incorrect wired sensor).
23 150 F to 220 F
Remote 9.0 Volt=
Sets the temperature corresponding to input (C+,C-) 9 Volts. Voltage above
9V is considered invalid, (failed or incorrect wired sensor).
24
No
Display Only
Control
Remote Sensor
Enables the Remote System Temperature sensor display and control logic:
No Remote Sensor Input (R+,R-) is ignored.
Display Only Remote Sensor Input (R+,R-) is used for display only.
Control Remote Sensor Input (R+,R-) is compared with the
temperature setpoint to establish a modulation rate.
25
No
Yes
System Pump
Enables the System Pump output (SO).
27
No
Yes
LWC or CAD
Specifies a Low Water Cut-off Switch or Combustion Air Damper (Fresh Air
Damper) Open switch is connected to input (LC). Enables Limit Hold and
alarm messages. Limit hold display message is described by parameter 28.
28
16 Text
Characters
Alarm Message
Limit Hold and alarm message displayed corresponding to sensor connected
to input (LC).
The “ENTER” key and “Up” and “Down” arrow keys are used to change the
text Message.
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