LAARS LLS-1 - Instruction Manual - Manual (Page 12)

Page 12
LAARS HEATING SYSTEMS
To change a value select it by hitting the enter
key, the value will start to flash. Use the arrow keys
to change the value, when finished hit the enter key,
the value will stop flashing. The readout will go back
to Display #1 if left inactive on any display for longer
than thirty (30) seconds.
Display #10 - Vent Damper Option
If this menu is selected the following display
will appear.
VENT DAMPER OPTION
Use the arrow keys to scroll through the
information, it will appear as follows:
VENT DAMPER OPT = YES/NO
If a vent damper is installed, this will tell the
controller to open it, check its proving switch and
close it.
POSTPURGE __ MIN
If a venter fan has been installed and
programmed with a post-purge, this will keep the
vent damper open while the fan post-purges. If no fan
post-purge has been set, this will post-purge the
damper.
To change a value select it by hitting the enter
key, the value will start to flash. Use the arrow keys
to change the value, when finished hit the enter key,
the value will stop flashing. The readout will go back
to Display #1 if left inactive on any display for longer
than thirty (30) seconds.
Display #11 - Gas Valve Staging
If this menu is selected the following display
will appear.
GAS VALVE STAGING
This option is for stage-fired units only.
Use the arrow keys to scroll through the
information, it will appear as follows:
DIFFERENTIAL __F
To set the temperature differential between the
first and second stages, enter a time here.
To change a value select it by hitting the enter
key, the value will start to flash. Use the arrow keys
to change the value, when finished hit the enter key,
the value will stop flashing. The readout will go back
to Display #1 if left inactive on any display for longer
than thirty (30) seconds.
Display #12 - Perform System Check
If this menu is selected the following display
will appear.
PERFORM SYSTEM CHECK
Use the arrow keys to scroll to the following
question:
PRESS UP = DO CHECK
PERFORM SYSTEM CHECK? _
Use arrow keys to switch between Y and N.
Select by pressing the enter key. If N is selected the
readout will return to Display #1. If Y is selected the
following display will flash for 10 seconds while the
system is being checked:
PERFORMING CHECK ..
Once the check is complete one of the following
two message will be displayed:
SYSTEM OK or
ERROR AT __________
The readout will go back to Display #1 if left
inactive on any display for longer than thirty (30)
seconds.
Display #13 - Sensor Values
If this menu is selected the following display
will appear.
SENSOR VALUES
Use the arrow keys to scroll through the
information, it will appear as follows:
LWCO __
This will display voltage at the low water cutoff
(if a Laars low water cutoff is installed).
FLAME SENSOR __
This will display voltage at the flame sensor.
BOILER PUMP __ A
This will display the Amperage of the pump
motor, if controlled by the LLS.
DHW PUMP __ A
This will display the Amperage of the domestic
water pump motor, if controlled by the LLS.
24V REF __
This will display the voltage from the
transformer, to compare control voltage to what is
coming out of the unit’s transformer.
The sensor value information cannot be
changed. The readout will go back to Display #1 if
left inactive on any display for longer than thirty (30)
seconds.
OUT OF
PRODUCTION