To Next PageTo Next PageHow to fix CH Temp drops lower than expected before unit re-fires on Laars FT?
To address a CH Temp drop lower than expected before the Laars Boiler re-fires, change Parameter 14:bo to 10 degrees F (5.5 degrees C).
How to reset TEMPERATURE SENSOR error on Laars FT Boiler?
If your Laars Boiler displays a TEMPERATURE SENSOR error, it means a temperature sensor has either electrically shorted (SHORT) or become disconnected (OPEN). You can attempt to reset this using the manual reset screen on the Control Display, accessible via the Power button.
Why is the water from my Laars Boiler not hot enough?
If the water from your Laars Boiler isn't hot enough, first check that the temperature setting on the unit isn't too low. Then, make sure the filter in the cold water supply line isn't clogged with debris. Also, ensure that the gas supply type is correct and that the supply and manifold gas pressures are in accordance with specifications. Lastly, verify that the water flow sensor with three wires is properly connected on top of the heat exchanger.
How to fix hot water temperature fluctuation in Laars Boiler?
To fix hot water temperature fluctuation in your Laars Boiler, start by ensuring that the filter in the cold water supply line is clean. Next, verify that the gas supply type is correct and that the supply gas pressure is sufficient. Insufficient gas pressure can lead to temperature fluctuations.
What to do if Laars Boiler water is too hot?
If the water from your Laars Boiler is too hot, first, make sure that the temperature setting on the unit is not set too high. Additionally, check that the filter in the cold water supply line is not clogged with debris. Finally, ensure that the gas supply type being used is correct for your unit.
What to do for IGNITION FAULT on Laars Boiler?
If the Laars Boiler shows an IGNITION FAULT, even after 8 ignition attempts, and it still can't detect a flame, power the system off and then back on again.
How to reset FLAME FAULT on Laars FT?
If the Laars Boiler displays a FLAME FAULT error, it indicates that flame was detected when it shouldn't have been. You can reset this error using the manual reset screen on the Control Display by pressing the Power button.
How to reset BLOWER FAULT on Laars FT?
If the Laars Boiler displays a BLOWER FAULT, it means the blower couldn't reach the required speed or didn't reach 0 RPM when turned off. To resolve this, reset the system using the manual reset screen on the Control Display, accessible via the Power button.
Why is Laars Boiler water not hot enough?
If your Laars Boiler isn't providing hot enough water, start by checking the temperature setting on the unit to ensure it's not set too low. Next, inspect the filter in the cold water supply line for any clogs or debris. Confirm that the gas supply type is correct for your unit. Also, verify that the supply and manifold gas pressures align with the specified requirements. Lastly, ensure the water flow sensor, which has three wires, is properly connected on top of the heat exchanger.
What to do if Laars FT doesn’t fire when DHW flow is initiated?
If your Laars Boiler doesn’t fire when domestic hot water (DHW) flow is initiated, it's potentially because the domestic water flow is too low. The minimum allowable flow is 0.75 gpm. Check in Manual Mode OTO AGA.
Manual provides necessary information for installation, operation, and maintenance.
Lists all components included with the boiler for installation.
Explains how the model number identifies boiler characteristics.
Details technical specifications like input rate, water capacity, dimensions, materials, safety devices.
Provides detailed physical dimensions and connection port sizes.
Identifies and lists all major components of the boiler with corresponding numbers.
Describes water flow during central heating operation.
Describes water flow during domestic hot water production.
Explains the meaning of DANGER, WARNING, CAUTION symbols used in the manual.
Crucial safety instructions before operating the appliance.
Warns about the dangers of flammable liquids and vapors.
Safety advice regarding water-damaged components.
Steps to take if a gas leak is detected during operation.
Risks and precautions related to carbon monoxide.
Specifies required clearances for installation and service access.
Emphasizes importance of clearances for maintenance.
Stresses the importance of a structurally sound and level installation surface.
Importance of a level location for proper condensate drainage.
Details requirements for drawing combustion air from the room.
Explains how to route combustion air using ducts.
Specifies requirements for venting system support and slope.
Addresses potential damage from acidic condensate and neutralizer use.
Prohibits common venting of FT units with Category I appliances.
Prohibits specific types of PVC/CPVC for non-metallic venting.
Guidelines for vent system installation based on codes.
Boiler is designed as Direct Vent requiring outside air.
Clearances for vent pipe termination in Canada.
Clearances for vent pipe termination in the U.S.
Mandates installation of carbon monoxide detectors.
Requires specific signage for horizontally vented appliances.
Reiterates prohibition of common venting with Category I appliances.
French warning against common venting with Category I appliances.
Maximum vent and air pipe lengths with deductions for elbows.
Details direct venting connections and requirements.
Guidelines for providing combustion air from inside the installation space.
Instructions for terminating vent and air pipes.
Diagrams and requirements for sidewall vent termination.
Details concentric vent termination for horizontal and vertical setups.
Lists approved Heat-Fab SC series concentric venting components.
Lists approved Duravent PolyPro concentric venting components.
Step-by-step process for assembling a new concentric stainless steel venting system.
Process for integrating with existing stainless steel venting.
Step-by-step process for installing Duravent PPS concentric system.
Warning about inappropriate vent terminal extensions for condensing boilers.
Instructions for using flexible chimney liners for venting.
Warning about the dangers of gas ignition.
Illustration and details of the gas line shut-off valve.
Diagram showing suggested gas piping layout for natural gas.
Diagram showing suggested gas piping layout for propane gas.
Instructions for adjusting gas pressure with a combustion analyzer.
Warning about installer's responsibility for combustion settings.
Instructions for setting the boiler for high altitudes.
Warning about proper installation of gas conversion kit.
Lists system control settings and parameters.
Guidelines for connecting external plumbing and water lines.
Warning about scalding risk and anti-scald valve installation.
Diagram and details for DHW piping and recirculation.
Wiring diagram for DHW recirculation pump control.
Explains zoning systems using zone valves.
Wiring diagram for zone valve systems with optional high temp zone.
Describes zoning with a single pump and thermostat wiring.
Wiring diagram for a single pump system.
Explains zoning systems using multiple pumps.
Wiring diagram for a multiple pump system.
Warning about correct pressure relief valve ratings.
Guidelines for selecting pressure relief valves based on BTU/H rating.
Requirement for condensate drainage on Category II & IV boilers.
Precautions regarding acidic condensate and potential pipe damage.
Safety warning before cleaning flow restrictor and filter.
Warning about proper electrical installation and grounding.
Safety warning regarding electrical shock hazard.
Explains the function and setting of dip switches.
Lists various system control settings and parameters.
Detailed electrical diagram of the control board.
Provides a ladder diagram for electrical control logic.
Lists various connectors and their pin assignments.
Continues listing connectors, pin assignments, and descriptions.
Explains the functions of control dial and buttons.
Describes the icons and display elements on the LCD.
Details the information displayed in operating mode.
How to access and view status display parameters.
How to change domestic hot water set points.
Danger of scalding from high water temperatures.
How to change central heating set points.
How to activate and use storage mode.
Procedure for accessing and changing installer parameters.
Warning regarding adjustments for low temperature heating.
History fault code display.
Clears the error history buffer.
Controls heat storage function ON/OFF.
Sets the maximum heating temperature.
Sets the minimum heating temperature.
Sets the maximum hot water temperature.
Sets the boiler for high altitude operation.
Sets boiler pump purge time.
Selects DHW recirculation operation mode.
Sets hybrid mode firing rate for DHW priority.
Sets hybrid mode firing rate for CH + DHW.
Varies set point based on outdoor temperature using a graph.
Controls set point temperature via 0-10V DC signal.
Displays error codes and communication status.
Lists error codes, descriptions, and possible remedies.
Continues listing error codes and their corrective actions.
Continues listing error codes and their possible remedies.
Fault tree analysis for flame detection issues.
Fault tree analysis for gas detection issues.
Fault tree for sensor-related issues.
Lists common questions and diagnostic answers for troubleshooting.
Corrective actions for no display but blower running.
Corrective actions for no display and no operation.
Troubleshooting for temperature sensor faults.
Troubleshooting for flame detection faults.
Troubleshooting for blower operation faults.
Troubleshooting for ignition sequence faults.
Troubleshooting for gas valve output circuit faults.
Procedures for annual startup and general maintenance.
Warning about removing contaminants and calling service.
Instructions for checking and maintaining the air vent.
Instructions for cleaning the burner exterior.
Procedure for flushing the DHW heat exchanger.
Steps for draining and cleaning the boiler's water filter.
Recommendations for freeze protection in cold areas.
A quick checklist before and during installation.
Checks to perform before starting installation.
Guidelines for installing water piping.
Checklist for installation conditions.
Checklist for gas pipe installation.
Checklist for air and vent pipe installation.
Checklist for condensate drain installation.
Checklist for setting DIP switches.
Checklist for power supply connection.
Checklist for pressure relief valve installation.
Checklist for burner flame inspection.
Exploded view illustration of the casing assembly.
Illustration of the tank and water pipe assembly.
Illustrations of heat exchanger and tank components.
Illustration of the fan and gas valve assembly.
Lists all available accessory items and their part numbers.
QR codes and links for product and service videos.
General| Model | FT Series |
|---|---|
| Category | Boiler |
| Fuel Type | Natural Gas or Propane |
| Heat Exchanger Material | Stainless Steel |
| Brand | Laars |
| Efficiency | Up to 95% |
| Boiler Type | Condensing |
| Venting | PVC or CPVC |
| Water Content | Varies by model |
| Weight | Varies by model |
| Dimensions | Varies by model |
| Input Range | 50, 000 to 299, 000 BTU/h |
