Page 31
ECONOMY Settings
(WWSD Curve Adj -and more)
HI LIMIT
(Program Select)
LO LIMIT
(Adv Programing)
Mode
Control,
Digital
and
Ignition
LEDs
For full details, See Section 8.A.5 on page 31
Figure 32. The Dials and Indicators of the Digital Dashboard
SYSTEM START-UP
1
Carbon monoxide hazard. The vent damper must be fully open and the flue must be clear
before the main burner fires. If the burner fires when the vent damper is not fully open or the
flue is blocked, dangerous flue products such as carbon monoxide will escape into the house
causing severe personal injury or death. The vent damper and flue must be checked for
proper operation before allowing the system to operate.
Electrical shock hazard. The ignition circuit of the control can produce over 10,000 volts
which can cause severe injury or death.
Decimal lights on a call for heat.
LEDs light in sequence.
The Ignition LED’s
light in sequence
8.A.4
Mode
The Mode button performs various functions when
testing, viewing, and selecting the settings of your
boiler. See Sections "Advanced Programing" on page
32 and "Sensor Programming" on page 33
8.A.5 Control LEDs
See Figure 32
8.A.5.a TS ACTIVE (TEMP)
Indicates that the control is powered and that the
temperature function is active.
8.A.5.b HIGH TEMP
Illuminates when the boiler water temperature reaches
the high limit setting. The control will prevent the burner
from operating until the temperature drops below the
on differential. The Control prevents burner operation
while this LED is on.
8.A.5.c LWS ACTIVE (LWCO)
Indicates that the low water cut-off (LWCO) function of
the Control is active.
IMPORTANT NOTE: If the sensor installation has
been modified to a single function sensor well, this
LED will not illuminate indicating that the control is
not providing low water cut-off functionality. Always
use a dual purpose temp and LWCO sensor well.
8.A.5.d LOW WATER
WARNING
Allow the boiler to fully cool before adding water.
Indicates that the boiler is in a low water condition.
The control will prevent burner operation during this
condition. The control has been programmed to provide
shutdown protection in the event a low water condition
is detected. When water is detected, the condition will
return to normal. If LWCO condition will not clear, see
Section 11.D.1 on page 45
Also See 8.B.2 on page 32 for more info.
8.A.5.e TEMP ACTIVE (ECONOMY)
Indicates that the Thermal Targeting function is active
and the control will reduce boiler temperature to
conserve fuel. The Economy feature is activated using
the ECONOMY dial.
8.A.5.f TEMP TARGET
When the Economy feature or Outdoor Reset is active,
the control continually sets target temperatures below
the high limit setting to maximize fuel efficiency. When
the boiler water reaches the target temperature, the
LED illuminates and the burner will shut down. The
boiler water will continue to circulate and heat the
house as long as the thermostat call continues. The
LED will stay lit until the boiler temperature drops below
the differential set point at which point the boiler will be
allowed to fire again.
NOTE: This LED illuminates regularly during normal
boiler operation.
8.A.6 Digital LEDs
See
Figure 32
The Digital Display is the numeric display in the middle
of the control and presents the numeric value of all
temperatures and setpoints and advanced programing
settings.
M
INI-
T
HERM
JX
Residential Boilers
®
