LAARS LLS-1 - Instruction Manual - Manual (Page 8)

Page 8
LAARS HEATING SYSTEMS
Boiler Settings
Inlet Water Temperature
· 110°F min
· 220°F max
· 140°F default models HH/PH
· 110°F default models VW/PW
Operating Differential
· 2°F min
· 30°F max
· 15°F default models HH/PH
· 5°F default models VW/PW
Outlet Water Temperature
· 110°F min
· 240°F max
· 200°F default models HH/PH
· 180°F default models VW/PW
Low Return Water Temperature (for alarm)
· 40°F min
· 240°F max
· 80° default
Boiler Pump Settings
Boiler Pump Installed
· “yes” or “no”
· “yes” default for PH/PW
· “no” default for HH/VW
Run Constant, Auto
· “auto” default
· “constant” optional
Pump Extended Run Cycle (pump delay time)
· 0 minute min
· 10 minute max
· 5 minute default
Pump Exercise
· “no” default
· “yes” optional
Pump Exercise Frequency
· 1 day min
· 9 days max
· 7 days default
Freeze Protection
· “on” default
· “off” optional
Freeze Protection to operate at
· 33°F min
· 50°F max
· 35°F default
Domestic Hot Water (DHW) Settings
IMPORTANT NOTE: The DHW connection
on the LLS is only for the Laars DHW sensor.
Standard tank aquastats must be connected to the
LLS field interlock. These Domestic Hot Water
settings are only used if the Laars DHW sensor is
controlling tank temperature.
DHW Operation
· “off” default
· “on” optional
DHW Setpoint Temperature
· 110°F min
· 190°F max
· 110°F default
Operating Differential
· 2°F min
· 30°F max
· 5°F default
Outdoor Reset Settings
(Not applicable to models VW & PW)
NOTE: Outdoor Reset is accomplished with
Laars Outdoor Reset sensor. Other sensors may not
be compatible with the LLS control logic.
Outdoor Air Temperature Sensor Installed
· “no” default
· “yes” optional
Outdoor Reset
· “off” default
· “on” optional
Outdoor Reset Ratio (Boiler inlet temp set point
governs high end of curve)
· min
· 5 max
· default
Maximum permissible water temperature (will
override reset curve)
· 150°F min
· 220°F max
· 190°F default
Minimum permissible water temperature (will
override reset curve)
· 110°F min
· 150°F max
· 130°F default
Warm Weather Shutdown
· “on” default
· “off” optional
Warm Weather Shutdown Temp
· 40°F min
· 120°F max
· 60°F default
Alarm Settings
External Alarm
· “on” default
· “off” optional
Internal Alarm
· “on” default
· “off” optional
OUT OF
PRODUCTION