tekmar 274 Boiler Control - Manual (Page 3)

3 of 44 © 2012 274_D - 11/12
Display
PRIMARY PUMP
Displays when primary pump 1 or
primary pump 2 is in operation
BOILER
Displays which boiler stage is
operating
LOCK
Displays when adjusting Access level if
Switch is set to lock.
WARNING
Displays when an error exists.
COMMUNICATION BUS
Displays when tN4 thermostats are
connected.
DHW PUMP
Displays when the DHW Pump is
operating
°F, °C, MINUTES, AM, %, PM,
HOURS
Units of measurement.
BOILER PUMP
Displays when the boiler pump 1, 2, 3,
or 4 are operating
COMBUSTION AIR DAMPER
Displays when the combustion air
damper relay is closed
SCHEDULE MASTER
Displays when the 274 is a schedule
master
WARM WEATHER SHUT DOWN
Displays when the control is in warm
weather shut down
MINIMUM & MAXIMUM
Displays when the boil target or the boil
supply is at a minimum or maximum
Schd Wake
UnOcc Sleep
Away
Schd, Wake, UnOcc, Sleep, Away
Displays the current event of a
schedule or scene
POINTER
Displays the control operation as
indicated by the text
Symbol Description
Item Field
Displays the current
item selected
Buttons
Selects Menus, Items
and adjusts settings
Number Field
Displays the current value
of the selected item
Status Field
Displays the current
status of the control’s
inputs, outputs and
operation
Menu Field
Displays the
current menu
Menu Item