Watts tekmar 294 - Settings - Control Features and Alerts; Lead;Last Boiler Control; Combustion Air and Exercising Settings; Alert Threshold Settings

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IOM-T-294 2205 © 2022 tekmar
Parameter Range Description
FIXED LEAD
Off or On
Default: Off
Select if boiler 1 is always the first boiler to fire. This feature is useful in cases whereby
boiler 1 primes the flue gas venting.
FIXED LEAD TYPE
First On/First Off or
First On/Last Off
Default: First On/Last
Off
Select if boiler 1 is the first on/first off or first on/last off. Available when Fixed Lead
is On.
FIXED LAST
Off or On
Default: Off
Select if the last available boiler is always the last to fire. When using a 294 the last
boiler is 4. If there is one 294EXP expansion then the last boiler is 8. If there are two
294EXP expansions then the last boiler is 12. If there are three 294EXP expansions
then the last boiler is 16.
COMBUSTION AIR
DELAY
0 to 360 seconds
Default: 0 seconds
Set the time that the combustion air damper is open before turning on the first boiler.
VARIABLE PRIMARY
FLOW
Boiler pumps or
Isolation valves
Default: Off
Select if the boilers each have a boiler pump or if there is a variable speed system
pump with isolation valves per boiler.
OUTDOOR SENSOR
Control, tekmarNet,
Internet
Default: Off
Set the source of the outdoor air sensor reading. tekmarNet is available when
connected to a tekmarNet communication system. Internet is available when
connected to the Internet through Ethernet or Wi-Fi.
PRESSURE SENSOR
Off or On
Default: Off
Select if a pressure sensor is installed.
EXERCISING
Off or On
Default: Off
Select if the control should exercise the pumps and valves every 72 hours to prevent
seizure.
BOILER MODBUS
Off or On
Default: Off
Select if the control is connected to the boilers using Modbus communication.
ALERTS
HIGH BOILER
TEMPERATURE
ALERT
50 to 230°F
(10.0 to 110.0°C)
Default: 230°F (110.0°C)
Set the threshold above which the control triggers a high temperature alert notification.
LOW BOILER
TEMPERATURE
ALERT
50 to 230°F
(10.0 to 110.0°C)
Default: 50°F (10.0°C)
Set the threshold below which the control triggers a low temperature alert notification.
BOILER PLANT NO
HEAT ALERT
0.5 to 80.0 minutes
Default: 10.0 minutes
Set the amount of time of no temperature change while boilers are firing after which
the control triggers a boiler plant no heat alert notification.
HIGH PRESSURE
ALERT
0 to 150 psi
(0 to 1050 kPa)
Default: 50 psi (1050
kPa)
Set the threshold above which the control triggers a high pressure alert notification.
LOW PRESSURE
ALERT
0 to 150 psi
(0 to 1050 kPa)
Default: 0 psi (0 kPa)
Set the threshold below which the control triggers a low pressure alert notification.
Settings (6 of 8)