LAARS LLS-1 - Instruction Manual - Manual (Page 11)

Laars Logic System Page 11
OPER DIFFERENTIAL ___F
This sets the desired differential of the domestic
hot water temperature setting.
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 #7 - Outdoor Reset
If this menu is selected the following display
will appear.
OUTDOOR RESET
NOTE: Outdoor Reset and Warm Weather
Shutdown are accomplished with Laars Outdoor
Reset sensor. Other sensors may not be
compatible with the LLS control logic.
Use the arrow keys to scroll through the
information, it will appear as follows:
USE OAT SENSOR = YES/NO
This tells the controller that the Laars OAT
(Outside Air Temperature) sensor has been installed.
OUTDOOR RESET ON _ OFF _
This turns the outdoor reset function on or off.
RESET RATIO _._
This setting is the outdoor reset ratio.
MAX RESET SETPT __F
This is the temperature at which the boiler will
override the reset ratio calculation, to ensure that the
boiler has the desired maximum temperature at the
boiler inlet (to prevent nuisance high limit trips and
higher-than-desired boiler temperature).
MIN RESET SETPT __F
This is the temperature at which the boiler will
override the reset ratio calculation, to ensure that the
boiler has the desired minimum temperature at its
inlet (to minimize the possibility of condensation).
WARM OAT SHTDN = ON/OFF
Warm weather shutdown (WWSD) can be
activated. In this mode, the boiler and pump will be
deactivated when the outdoor temperature reaches the
WWSD setpoint. In this mode, the pump will be
exercised if that option is chosen.
WARM OAT SHTDN @ __ F
This sets the temperature at which the user
would like the Warm Weather Shutdown to activate.
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 #8 - Alarm Settings
If this menu is selected the following display
will appear.
ALARM SETTINGS
Use the arrow keys to scroll through the
information, it will appear as follows:
EXTERNAL ALARM = ON _ OFF _
If an external alarm is connected, this will
activate it.
INTERNAL ALARM = ON _ OFF _
The controller has an internal alarm, which
beeps under an alarm condition. This will activate the
internal alarm sound, if desired. Alarms will appear
in the form of icons and in the text display, regardless
of whether this is activated or not.
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 #9 - Power Venter Option
If this menu is selected the following display
will appear.
POWER VENTER OPTION
Use the arrow keys to scroll through the
information, it will appear as follows:
VENTER OPTION = NO/YES
If a field-supplied power venter (or other draft
fan) has been installed, this will tell the controller to
activate the fan and check for the fan proving switch.
PREPURGE __ MIN
If desired, set a pre-purge cycle time, which will
run the fan for that amount of time before boiler
ignition takes place.
POSTPURGE __ MIN
If desired, set a post-purge cycle time, which
will keep the fan running after the call for heat has
been satisfied.
OUT OF
PRODUCTION