tekmar 421 Mixing Reset Module - Manual (Page 4)

© 2007 D 421 - 08/07 4 of 20
PUMP
Displays when the mixing pump is in
operation.
BURNER
Displays when the burner contact is
closed.
LOCK
Displays when the access levels are
locked.
WARNING
Displays when an error exists.
COMMUNICATION BUS
Displays when tN4 thermostats are
connected.
°F, °C, %, HOURS, MINUTES
Units of measurement.
MIX 1 DEMAND
Displays when a mix 1 demand is present.
DEVICE OUTPUT SCALE
Displays output of the injection pump or
mixing valve.
OPEN / CLOSE
Displays whether the actuator is opening or
closing the mixing valve.
Item Field
Displays an
abbreviated name
of the selected item
Number Field
Displays the
current value of
the selected item
Status Field
Displays the current
status of the control’s
inputs, outputs and
operation. Most symbols
in the status field are
only visible when the
VIEW Menu is selected
Menu Field
Displays the
current menu
Symbols Description S Display
Symbols Description