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Figure
36
- LED Legend
C
)(
O
_ACTIVE
Indicates
Limit Control
is
powered
and temperature
function
is active,
__HITEMP
Illuminates
when
boiler water
temperature
reaches
high limit setting.
Remains
lit until
water temperature
falls 10°F, Limit control
prevents
burner
operation
while
this LED is on, See
Differential
explanation
page 39,
II_IW_ACTIVE
Indicates
low water
cut=off
(LWCO)
function
of limit control
is active.
Boiler
is factory
equipped
with Hydrolevel
electro=well,
enabling
control's
low water
cut=off function.
LED will
be on at all times
when
control
is powered.
Important:
If control
well is replaced
with a well
other
than
Electro=Well,
LED will not illuminate
indicating
control
is not providing
low water
cut=off
functionality.
O_TARGET
Economy
feature
is active,
limit control
continually
sets target
temperatures
below
high limit setting
to maximize
fuel efficiency.
When boiler water
reaches target
temperature,
LED
illuminates
and burner
shuts down.
Boiler water
will
continue
to circulate
and heat the house as long as
thermostat
call continues.
LED will stay lit until boiler
temperature
drops
below differential
set point at
which
point boiler will be allowed
to fire again.
Note:
LED illuminates
regularly
during
normal
boiler
operation.
TEST/SETTINGS
Button
To Test
Low Water
Cut-Off:
Press and hold Test/
Settings
button
for 5 seconds.
Display
will read LCO.
LWCO TEST
LCO
Red Low Water light should illuminate and burner circuit
(B1 and B2) should de-energize,
Note: Control must be in-
stalled with Electro-Well for low water cut-off functionality,
To View Current Settings:
Press and release Test/
Settings button in short intervals to sequentially
display the
following settings:
HIGH LIMIT SE_ING
LOW LJMET $E_|NG
t LL
ECONOMY
SE_ING
Burn and scald hazard.
Do not add water until
boiler
has fully cooled.
Failure to follow these instructions
could
result in death
or serious
injury.
__
LOW WATER
Illuminates
if boiler
is in
low--condition.
Limit control
will prevent
burner
operation
during
this condition.
Important:
System
must
be checked
by a qualified
service
agency
prior to resuming
operation.
_IF[ECONOM_ACTIVE
Indicates
thermal
targeting
funcIT65 ]g _ve
and limit control
will reduce
boiler
temperature
to conserve
fuel. Economy
feature
is
activated
using the Economy
dial. See "How Thermal
Targeting
Works"
this page.
CURRENT
TARGET
TEMPERATURE
OOO
PRE-PURGE
$E_ING
Display will return to boiler temperature
(default) if Test/
Settings button is not pressed for 5 seconds.
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