Lochinvar 45,000 - 260,000 BTU/HR service manual Troubleshooting Guide M9 Solution Boilers

Page 49

Installation & Service Manual

8Troubleshooting

Troubleshooting Guide: M9 Solution Boilers

Step 1:

Is the spark

 

ignitor sparking?

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

Step 2:

Is the pilot

staying on?

 

 

 

Yes

 

 

 

 

Check continuity on the spark

 

 

Check for an open

 

No

 

cable. Check for 24 VAC on

 

 

sensor. If no open

 

 

the 24v terminal (gray wire)

 

 

sensor, make sure

 

 

 

 

 

 

 

 

 

 

 

 

 

on the ignition module.

 

 

there’s a call for

 

 

 

 

 

 

 

 

 

 

 

 

heat. If call for heat

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

is present, replace

 

 

 

 

 

 

 

 

 

 

 

 

temperature control.

 

 

 

 

 

 

No

 

 

Yes

 

 

 

 

 

Check the pilot

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tube for gas.

 

 

 

 

 

 

 

 

 

 

 

No

 

 

Check draft.

 

 

 

 

 

 

 

 

 

 

 

 

Replace ignition

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

module.

 

 

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Is there 24 VAC (purple wire) on the 4-pin connector plug on the temperature controller?

Step 3: Is the gas valve getting 24 VAC

to the MV terminal?

Yes

 

 

Replace the

No

 

ignition

 

 

 

 

module.

 

 

 

Check gas pressure and make sure gas valve knob is on.

Yes

No

Is there 24 VAC (tan wire) on the 4-pin connector plug on the temperature controller?

Yes

No

Check voltage to and from the transformer.

No

Check incoming 120 VAC.

Check 24 VAC at R and W on the terminal strip.

Yes

Check each of the following for an open: -white and purple wire on the LWCO plug -rollout switch -manual reset high limit -spill switch

If any of these devices are open, press the reset button.

Check each of the following for an open:

-X and B on the terminal strip -purple and gray wires on the vent damper plug

-V and P on the terminal strip -auto reset high limit

49

Page 48 Page 50
Image 49
Page 48 Page 50
Contents Models 45,000 260,000 Btu/hr Contents Please read before proceeding WarrantyCodes Ratings Solution Boiler =B=R RatingTemperature and pressure gauge Solution How it worksSolution How it works Solution How it works Location of unit Determine boiler location3Combustion Air Direct from Outside 6Combustion Air from Outside Single Opening Minimum Recommended Combustion AIR Supply to Equipment Room Conventional Negative Draft Venting System VentingVent Pipe Sizes Venting Less from Ridge From Parapet Wall Vertical Vent Termination ClearancesSidewall Venting Negative Draft Masonry Chimney InstallationVent Materials Fan Assisted Venting7Vent Damper and Vent Damper Terminal Block Automatic Vent DamperGas Supply Gas Pressure Test Gas connectionsGas Connection Gas Piping Install Piping to Control2Wrench Gas Manifold Pressure Adjustment Procedure4Gas Supply Pressure Checking Gas Supply PressureVenting of Combination Gas Valves Combination Gas ValvesTwo Stage Burner Control System Water connections Water Flow Switch if equippedRelief Valve Low Water Cutoff if equipped Typical Heating Boiler InstallationsMinimum Required Flow For Heating Boiler General Plumbing RulesPiping of the Boiler System System Temperature Rise ChartWater Connections Heat Exchanger Pressure Drop ChartCirculator Pump Requirements Primary/Secondary Boiler Piping Circulator Pump SpecificationsCirculator Pump Operation Full Flow Application Low Temperature Bypass RequirementsBoiler Flow Rates Make UP Water Primary / Secondary PipingMake UP Water 6Multiple Boilers Zoned with Circulators From System Full System Flow8Single Boiler Full System Flow with Low Temperature Bypass Boiler Operating Temperature Control Terminal Strip WiringElectrical connections Auxiliary Device Connection to Terminal StripAMP Draw Data Temperature AdjustmentMaximum Set Point Determination Maximum SET Point DeterminationWiring of Remote Sensors Outdoor Air Temperature SensorInstallation of Remote Sensors Additional Temperature Controls Outdoor Air Reset Option7Blocked Vent Switch Location Blocked Vent and Flame Roll-Out / Flame Interlock SwitchStart-up Pre-start ChecklistInitial Start-up Lighting Instructions for Spark Ignition Pilot ModelsOperating Instructions Safety Shutoff Test for Spark Ignition Pilot SystemTo Turn Off Gas to Appliance Freeze Protection Intermittent Pilot Spark Ignition SystemWater Treatment Ignition and Control TimingsService technician Maintenance Maintenance and annual startupOwner maintenance See the User’s Information Manual for instructionsMaintenance Check Relief Valve Check Expansion TankCheck Control Settings Check All WiringHeat Exchanger / Burner Access Perform Start-up and ChecksBreathing Fresh air Inspection and CleaningInspection of Heat Exchanger Waterways Review with ownerGas Train and Controls Water Circulating PumpTroubleshooting Guide M9 Solution Boilers TroubleshootingSchematic Diagram M9 Unit DiagramsWiring Diagram M9 Unit 45,000 260,000 Btu/hr Models 45,000 260,000 Btu/hr ModelsPage Revision a ECO #C03746 initial release SBR-I-S Rev a

45,000 - 260,000 BTU/HR specifications

Lochinvar, a leader in high-efficiency heating solutions, presents the Lochinvar line of boilers, specifically the Lochinvar 45,000 - 260,000 BTU/HR models. These boilers are designed to meet a wide range of heating demands, making them ideal for residential and commercial applications alike.

One of the key features of the Lochinvar boilers is their impressive efficiency rating. Utilizing advanced condensing technology, these units can achieve efficiencies of up to 96% AFUE (Annual Fuel Utilization Efficiency). This high efficiency not only reduces fuel consumption but also lowers utility bills, making it a cost-effective solution for heating needs.

The Lochinvar boilers are equipped with a powerful heat exchanger constructed from durable stainless steel. This design not only maximizes heat transfer but also enhances the longevity of the unit. By preventing corrosion and minimizing maintenance requirements, the stainless steel heat exchanger ensures that the boiler operates at peak performance for years.

Another significant aspect of the Lochinvar boilers is their modulating burner system. This technology allows the boiler to adjust its output based on demand, ensuring that it only uses the energy necessary to maintain the desired temperature. This feature not only improves efficiency but also contributes to a more comfortable indoor environment by minimizing temperature fluctuations.

The Lochinvar series also showcases a user-friendly control interface. The advanced LCD display allows for easy monitoring and adjustment of system settings. Connectivity options are often included, providing the ability to integrate with modern building management systems for enhanced control and diagnostics.

Safety features abound in the Lochinvar models, which include built-in safeguards such as temperature and pressure relief valves, flame detection systems, and modulation cut-off to protect against overheating and other hazardous conditions.

Moreover, these boilers are designed for easy installation and maintenance. Compact dimensions and lightweight design facilitate straightforward setup, even in tight spaces. Additionally, users can take advantage of the unit’s self-diagnostic capabilities to simplify troubleshooting and reduce downtime.

In conclusion, the Lochinvar 45,000 - 260,000 BTU/HR boilers represent a pinnacle of innovation in heating technology. With high efficiency, advanced control systems, durable components, and safety features, they stand out as reliable and effective solutions for a variety of heating applications, ensuring comfort and efficiency in any environment.
Top Page Image Contents