Lochinvar 150 - 500 Combustion Analysis Procedure, Or Obstruction, Gas Supply Pressure

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Service Manual

3Troubleshooting

Combustion Analysis Procedure

1.Turn the main power off to the water heater by placing the “On/Off” switch in the OFF position.

2.Remove the flue temperature sensor from the flue pipe connection. Note: Combustion measurements will be made at this point.

3.Turn the main power on to the water heater by placing the “On/Off” switch in the ON position.

4.Place the water heater into the active position by pressing the SHUTDOWN button on the display board (see page 5) until WHR:Standby appears in the display window.

5.Locate the pinhole button above the “R” in the Armor logo on the display board (see page 5). Press the button once and hold for 5 seconds to place the water heater into Service Mode. In Service Mode the water heater will fire at ignition speed and will then modulate up to full fire.

6.Insert the probe from a combustion analyzer into the hole left by the removal of the flue temperature sensor.

7.Once the water heater has modulated up to full fire, measure the combustion. The values should be in the range listed in Table 3G above. The CO levels should be less than 150 ppm for a properly installed unit.

If the combustion is not within the specified range, reference the chart below for possible causes and corrective actions.

Table 3G Flue Products

Natural Gas

Propane

 

 

 

 

CO2

O2

CO2

O2

8.0% - 10%

3.0% - 6.5%

9.0% - 11%

4.1% - 6.9%

 

 

 

 

8.Once the combustion analysis is complete, test the safety shutoff device by turning the manual shutoff valve to the OFF position and ensuring that the water heater shuts down and registers an alarm. Open the manual shutoff valve, reset the control, and return to Service Mode.

9.Turn the main power off to the water heater and replace the flue temperature sensor into the flue pipe connection.

10.Place the water heater back into normal operation.

￿WARNING You must replace the flue gas temperature sensor to prevent flue gas spillage into the

room. Failure to comply could result in severe personal injury, death, or substantial property damage.

Table 3F Troubleshooting Chart - Combustion Levels

POSSIBLE CAUSE

CORRECTIVE ACTION

 

 

 

• Refer to Section 3 - General Venting of the Armor Water Heater Installation and Operation

Vent/Air Intake Length

Manual for the proper venting and air intake methods for the Armor water heater.

or Obstruction

• Check for obstructions at the vent/air intake terminals.

 

 

Gas Supply Pressure

• Refer to Section 7 - Gas Connections of the Armor Water Heater Installation and Operation

Manual for the proper gas supply for the Armor water heater.

 

 

 

Dirty/Damaged Burner

• Refer to page 19 of this manual for burner removal and cleaning procedures.

• Replace burner if necessary.

 

 

 

Gas Valve Adjustment

• Refer to page 33 of this manual for the gas valve adjustment procedure.

 

 

 

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Contents Models 150 Contents Niosh stated First Aid Please read before proceedingHandling ceramic fiber materials What is in this manual? ServiceMaintenance TroubleshootingService Armor water heater displayControl inputs Control outputs General Operation How the water heater operatesSequence of operation Saving parametersSequence of operation Display panel menu access Use this procedure to access menus from the display panelDisplay panel parameter access Button Operation Display CommentsParameter table WHRViewable and changeable control parameters Not used Data loggingNot used Control modes WHR settingsFunctions Service Notification Circulation pumpsOwner maintenance Maintenance Maintenance and annual startupService technician Maintenance Flue vent system and air piping Check water systemCheck expansion tank Check water heater relief valveCheck ignition ground wiring Check all water heater wiringCheck control settings Perform start-up and checksCheck flame signal Cleaning water heater heat exchangerReview with owner Oiled bearing circulatorsTroubleshooting Before troubleshootingCheck control module fuses Check the followingNo Display No BurnerOperation Unit Does NotChecking temperature sensors Temperature F Resistance ΩNoisy Operation No PumpRelief Valve OpeningFlow Switch FlameSequence GV/RelayNo Flame Ign No Flame RunningManual Reset High LimitFan Low Fan Speed LowFan High Fan Speed HighSensor Open Sensor ShortedProgr Rem Ctrl FltParameters Service Blk Watch Dog ErrorNo Error Stored Low 24 VACCombustion Analysis Procedure Gas Valve AdjustmentOr Obstruction Gas Supply PressureModel Gas valve adjustment procedureModels 150 Page

150 - 500 specifications

Lochinvar has established itself as a leader in the field of hydronic heating solutions, and the Lochinvar 150 - 500 series is a prime example of its commitment to innovation and efficiency. Designed primarily for commercial applications, this line of high-efficiency boilers is engineered to provide optimized performance, reliability, and cost-effectiveness.

One of the standout features of the Lochinvar 150 - 500 series is its robust construction. Built with a durable stainless-steel heat exchanger, these boilers offer superior resistance to corrosion, ensuring a longer lifespan and consistent performance over time. The advanced design of the heat exchanger also maximizes heat transfer, contributing to higher efficiency ratings.

In terms of technology, the Lochinvar 150 - 500 series incorporates the Concentric Venting System, which allows for flexible installation options and reduces the overall footprint required for the boiler setup. This system is particularly advantageous in commercial settings where space can be limited. The boilers are equipped with smart controls that provide real-time monitoring and diagnostics, allowing for easier maintenance and reducing downtime.

The series features a comprehensive modulation range, allowing the boilers to adjust their output based on the heating demand. This capability not only enhances efficiency but also lowers energy consumption, making it an eco-friendly choice for businesses seeking to reduce their environmental impact. The Lochinvar 150 - 500 boilers utilize innovative combustion technologies, including an integrated burner that ensures optimal combustion efficiency and reduced emissions.

Safety is a priority with the Lochinvar 150 - 500 series, which includes multiple safety features such as lockout protection, pressure switches, and high-temperature limit controls. These measures ensure that the unit operates safely under varying conditions, providing peace of mind for operators.

Additionally, the compact design of the Lochinvar 150 - 500 series allows for easy transportation and installation. Its lightweight structure enables it to be maneuvered through tight spaces typically found in commercial buildings, making it a versatile option for installers.

In summary, the Lochinvar 150 - 500 series is an excellent choice for anyone seeking a reliable, efficient, and technologically advanced boiler solution. With its durable construction, advanced features, and commitment to safety and efficiency, this series stands out as a trusted option in the competitive market of hydronic heating systems.
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