LAARS LLS-1 - Instruction Manual - Manual (Page 3)

Laars Logic System Page 3
SECTION 1.
General Information
1.1 Introduction
The Laars Logic System (LLS) is a solid state,
commercial control capable of interfacing with your
boiler or water heater to intelligently provide heat
energy, diagnose problems and display boiler status
via a liquid crystal display (LCD).
The LLS-1 allows you to customize your boiler’s
operation to best suit the needs of your application,
while providing you with useful information to
increase efficiency and simplify servicing.
The control reads information from multiple
inputs and controls multiple outputs with a total of
seventeen display readings. All sensors are monitored
in parallel for increased safety.
The control features a simple user interface that
allows programming of many functions and
parameters. All boiler / domestic water settings are
accessible through this interface as well as alarm
settings and gas valve staging. Pump options (such as
freeze protection and pump exercise) can also be
turned on or off. If the draft fan or power venter
option is used, they too can be controlled through
simple display windows.
1.2 Standard Operating Features
• All safety devices and sensors are checked to be
working properly prior to starting boiler
• Proven hot surface or spark ignition, pilot &
main gas valves, flame proving, vent dampers,
power venting equipment, and combustion air
intake equipment
• Optional outdoor air temperature reset for boiler
operating temperature
• Alarm contacts for fault conditions
• Domestic Hot Water (DHW) set-point with
adjustable differential (when Laars sensor is used)
• Control primary boiler pump
• Control DHW circulator (when Laars sensor is
used)
• Display supply water temperature
• Display return water temperature and set point
• Display outdoor air temperature (OAT sensor
optional)
• Display DHW storage tank temperature & set-
point
• Adjustable pump time delay
• Adjustable manual reset outlet water temperature
• Control boiler staging
• 2 amp fused relays for low voltage devices
• 30 amp fused relays for high voltage devices
• Removable relay terminals for easy wiring
• Easy to access, easy to read control box
locations
• Back-lighting for all LCD’s to make
programming easier in dark locations
• Modes for set-up, normal operation,
programming & trouble-shooting
• Components such as power venters, combustion
air intake systems, outdoor air sensors are field
configurable
• Continuous display of basic operating conditions
with easy to read symbols
• Adjustable fan setting for pre and post purge timing
• LCD will display and diagnose boiler
performance down to the component level
• Redundant processors constantly monitor all
safety devices and control operation
1.3 Inputs
1.Tank Temperature Sensor (optional Laars sensor
for DHW)
2.Inlet Water Temperature Sensor
3.Outlet Water Temperature Sensor
4.Flame Sensor
5.Low Water Cut Off (Water Level)
6.Blocked Vent Switch
7.Water Flow Sensor (Flow Switch)
8.High Gas Pressure Sensor (may be optional)
9.Low Gas Pressure Sensor (may be optional)
10.Venturi Differential Pressure Switch
(MightyMax)
11.Burner Temperature Switch (Mighty Max)
12.Fusible Links (when boiler/heater is equipped)
13.Vent Damper Open (when boiler/heater is
equipped)
14.Draft Inducer Pressure Switch (when used)
15.Auxilliary Devices
1.4 Outputs
1.Boiler Pump
2.Igniter or Pilot Igniter Control
3.Pilot Gas Valve Control
4.Gas Valve Control
5.DHW Circulator (when used with Laars sensor)
6.Vent Damper (when used)
7.Alarm
8.Draft Inducer (when used)
1.5 Indications / Displays
• Inlet Water Temperature
• Outlet Water Temperature
• Temperature Set Points for inlet water and DHW
• Ignition Process Indicators
• Low Water Cut Off Status (Water Level)
• Vent Damper Status
• Water Flow Status
• Supply Gas Pressure Status (when ordered with
gas train)
• Lockout Indication and Alarm
• Main Gas Valve On/Off
OUT OF
PRODUCTION