TSBC Instruction Manual Page 17 of 48
Front Panel
Display Mode
All values shown in Display Mode are for display only and can not be adjusted by the operator. The
keys scroll through the Display Mode screens:
Boiler State
Standby boiler state shown, refer to the top of pages 6
& 7 for explanation of each boiler state.
Alarm Message Low Inlet Temp alarm shown, refer to pages 36 & 37
for explanation of all possible alarm messages, the
alarm line is left blank when no alarm is active.
OUT Boiler Outlet Temperature
IN Boiler Inlet Temperature
RST Remote System Temperature
(visible when ‘Remote Sensor’ = Display Only or
Control)
OA Outside Air Temperature
(visible when ‘Outdoor Sensor’ = Display Only or
Outdoor Reset)
OUT or RST Boiler Outlet or Remote System Temperature
(Remote System when ‘Remote Sensor’ = Control)
SP Active Setpoint
MOD RATE Modulation Rate
SH Space Heating (active when DH is not)
DH Domestic Hot Water Priority
(visible when ‘DHWP’ = Yes and DP input is true)
In Boiler Inlet Temperature
SP Min In H2O Temp
MIX VALVE Modulation Rate
Control Mode
Outlet Sensor & Local SP Mode message shown, refer
to page 2 for an overview of each control mode.
LEAD BOILER (0 – 8) Lead Boiler, when zero is displayed modulating
lead-lag functions are not available.
CYCLES Number of boiler cycles
HOURS Number of boilers operating hours
Home Screen
The Boiler State and Alarm Message screen is the ‘Home Screen’ and is reverted to when no key has been selected for
longer than 30 minutes.
Alarm LED
New alarms illuminate the alarm LED and energize an alarm output (SO) (if enabled). If a lockout condition is detected,
the alarm LED will blink and the lockout indication output (LI) is energized. The display Message is cleared and relays
de-energize when the alarm condition is cleared.
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