Operation Instructions Document 4188A Operation Instructions for Laars F O Logic T U N O System O I T C LLS-1 U D O R P LCD Boiler Controller To be used in conjunction with appropriate product Installation and Operation manual shipped with product. WARNING H0243200A Improper adjustment, alteration, service or maintenance can cause injury or property damage. Refer to this manual.
LAARS HEATING SYSTEMS Page 2 TABLE OF CONTENTS SECTION 1 General Information 1.1 1.2 1.3 1.4 1.5 Introduction .................................................... 3 Standard Operating Features ........................ 3 Inputs ............................................................. 3 Outputs .......................................................... 3 Indications / Displays ..................................... 3 SECTION 2 Operation 2.1 SECTION 6 Programming .....................................
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).
LAARS HEATING SYSTEMS Page 4 Main Gas Flame Status (if main burner flame sensor is present) Pump / Circulator Status for Boiler and DHW Pumps Fan Status Boiler Staging Status Service Required Indicators SECTION 2. Operation 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. Connections that are made to the LLS controller are described in this section. Sensors, field-supplied switches, power venters, aquastats, etc.
Laars Logic System Page 5 F O T U N O O I T C U D O R P Figure 1. Laars Logic System Connections. DHW Tank Temp - T3 This connection is for a Laars DHW (domestic hot water) Sensor only. (Standard tank aquastats must be connected to T1, the Field Interlock connection on the controller.) The Laars DHW sensor is a thermistor, not a switch, and this connection reads resistance. Use of this sensor allows the user to program domestic water features that are not available when using a standard tank aquastat.
LAARS HEATING SYSTEMS Page 6 Water Level Sensor - J9 This connection is for a Laars Low Water Cutoff only. (Other low water cutoff devices must be connected to Aux SW - J32.) This connection is made at the factory on units that are ordered with the Low Water Cutoff option or other options that include a Low Water Cutoff and is made in the field when being added after the unit is on site.
Laars Logic System Mighty Therm Boilers, models HH and PH, 175 and 250, require that vent dampers be installed. The vent damper relay (supplied with the controller) is plugged into this connection, but no other connections are made to the relay. The function of the relay is to close connections internal to the control board. ID Tag Port - J2 ID tag must NEVER be removed. Do not tamper with this connection at any time.
LAARS HEATING SYSTEMS Page 8 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 DHW Operation · off default · on optional DHW Setpoint Temperature ·
Laars Logic System Power Venter Option Power Venter Installed · no default · yes optional Pre-Purge Time · 0 minute min · 10 minute max · 0 (no purge) default Post-Purge Time · 0 minute min · 10 minute max · 0 (no purge) default Display #1 - Default During periods of inactivity the LLS-1 readout will display: LAARS LOGIC SYSTEM. In order to access one of the twelve menus hit the enter key.
LAARS HEATING SYSTEMS Page 10 INLET SETPOINT This is the desired boiler inlet water temperature. OPER DIFFERNTL __F This sets the desired operating temperature differential. MAN RESET TEMP ___F Displays units outlet water temperature. EXERCISE PUMP = NO/YES If this function is turned on, during long periods with no boiler/heater use (such as a hydronic boiler system in the summer), the LLS will run the pump to minimize the possibility of the pumps seizing up.
Laars Logic System 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.
LAARS HEATING SYSTEMS Page 12 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.
Laars Logic System TEST VOLTAGE __ V For factory information only. Display #14 - Operating Summary If this menu is selected the following display will appear. OPERATING SUMMARY Use the arrow keys to scroll through the information, it will appear as follows: Page 13 TOTAL CYCLES ____ The displays the total number of times the unit has cycled on/off since it was first installed This information cannot be changed.
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LAARS HEATING SYSTEMS Page 22 SECTION 8. Replacement Parts 8.1 Ordering Information To order or purchase parts, contact your nearest Laars dealer or distributor. If they cannot supply you with what you need, contact: Laars Customer Service, 6000 Condor Drive, Moorpark, California, 93021, Telephone (800) 900-9276. In Canada, contact 480 S. Service Rd., Oakville, Ontario, Canada L6K 2H4, Telephone (905) 844-8233. Visit our website at www.laars.com for Service Center listings.
Laars Logic System Page 23 F O T U N O O I T C U D O R P
H0243200- F O T U N O O I T C U D O R P Waterpik Technologies, Inc. 6000 Condor Drive, Moorpark, CA 93021 805.529.2000 FAX 805.529.5934 20 Industrial Way, Rochester, NH 03867 603.335.6300 FAX 603.335.3355 480 S. Service Road West, Oakville, Ontario, Canada L6K 2H4 905.844.8233 FAX 905.844.2635 www.laars.com Litho in U.S.A.
