Lochinvar 151 - 801 service manual Flame Sequence, Auto Reset, High Limit, Manual Reset

Page 31

Service Manual

3Troubleshooting (continued)

Table 3F (continued from previous page) Troubleshooting Chart - Fault Messages Displayed on Water Heater Interface

FAULT

DESCRIPTION

CORRECTIVE ACTION

 

 

 

Flame Sequence

 

• Check supply voltage for proper polarity.

 

 

 

 

 

(will require a manual

 

• Check external wiring for voltage feedback.

reset once the condition

 

The flame detector circuit is seeing a flame

 

 

 

 

has been corrected. Press

• Check the flame rod and make sure it is clean.

the RESET button on the

signal while no flame is present.

• Check the internal wiring for bad connections.

SMART SYSTEM display

 

 

 

 

 

 

to reset.)

 

• Replace main control board.

 

 

 

 

 

 

 

• Verify that the system is full of water and that all air

 

 

has been properly purged from the system.

 

 

• Verify that the water heater is piped properly into the

 

 

heating system. Refer to Section 6 - Hydronic Piping

 

 

of the Armor Installation and Operation Manual

 

 

for the proper piping methods for the Armor water

 

 

heater.

 

 

• Check 120 vac to water heater pump motor on a call

 

 

for heat. If voltage is not present, check wiring back

 

 

to the main control board.

 

 

• Replace the main control board if necessary.

Auto Reset

The outlet water temperature has exceeded

• If 120 vac is present on a call for heat and the water

the setting of the automatic reset high limit.

heater pump is not operating, replace the pump.

High Limit

 

 

 

 

 

• If the system pump is a variable speed pump, ensure

 

 

 

 

that the system flow is not less than the water heater

 

 

flow.

 

 

• If operating on something other than an outlet sensor,

 

 

check temperature setting of the main control board.

 

 

• If the manual reset high limit has tripped, check

 

 

setting of the device.

 

 

• Check resistance of water sensors and compare to

 

 

Table B on page 26 of this manual. Replace

 

 

sensor if necessary.

 

 

• Replace high limit.

 

 

• Verify that the system is full of water and that all air

 

 

has been properly purged from the system.

 

 

• Verify that the water heater is piped properly into the

 

 

heating system. Refer to Section 6 - System Piping

 

 

of the Armor Water Heater Installation and Operation

Manual Reset

 

Manual for the proper piping methods for the Armor

 

water heater.

High Limit

 

 

• Check 120 VAC to water heater pump motor on a call

(will require a manual

 

 

for heat. If voltage is not present, check wiring back

reset once the condition

The outlet water temperature has exceeded

to the main control board.

has been corrected. Press

the fixed setting of the manual reset high

 

 

 

 

the RESET button on the

limit.

• Replace the main control board if necessary.

SMART SYSTEM display

 

• If 120 VAC is present on a call for heat and the water

to reset.)

 

heater pump is not operating, replace the pump.

 

 

• If the manual reset high limit has tripped, check

 

 

setting of the device.

 

 

• Check resistance of water sensors and compare to

 

 

Table 3C on page 26 of this manual. Replace sensor

 

 

if necessary.

 

 

• Replace high limit.

 

 

 

 

31

 

 

 

 

 

 

 

 

 

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Contents Models 151 Contents Handling ceramic fiber materials Please read before proceedingNiosh stated First Aid Troubleshooting What is in this manual?Service MaintenanceArmor water heater display ServiceControl inputs Smart System Control BoardControl outputs Smart System Control BoardSequence of operation Access modesGeneral Operation How the water heater operatesOperation Display Button Screen Operation Display Status Display panel menu accessDisplay panel parameter access General Parameter tableModes Viewable and changeable control parameters Anti-Cycling DHW SettingsData Logging FunctionsControl modes Circulation pumps Minimum On/Off TimeService Notification Service technician Maintenance Maintenance and annual startupOwner maintenance Maintenance Check water heater relief valve Flue vent system and air pipingCheck water system Check expansion tankPerform start-up and checks Check ignition ground wiringCheck all water heater wiring Check control settingsOiled bearing circulators Check flame signalCleaning heat exchanger Review with ownerCheck the following TroubleshootingBefore troubleshooting Check control module fusesUnit Does Not No DisplayNo Burner OperationResistance Temperature Checking temperature sensorsTemperature F Resistance Ω Wire Color R/BK and Y Wire Color G and YOpening NoisyNo Pump Relief ValveFlow Switch Fault Description Corrective ActionFlame Fail Ign Anti-cyclingRunning No FlameHigh Limit Auto ResetManual Reset Flame SequenceFail Fan LowFan Speed Low GV/RelayDelta T High Sensor ShortedLouver Proving Flue Temp HighOutlet Temp High Service BlkRem Ctrl Flt Low 24 VAC Watch Dog ErrorNo Error Stored Fatal ErrorGas Supply Pressure Combustion Analysis ProcedureGas Valve Adjustment Or ObstructionModels 151 Gas valve adjustment procedureModel Models 601 4Gas Valve Adjustment Model

151 - 801 specifications

Lochinvar 151 - 801 is a high-efficiency commercial water heater designed to meet the demanding needs of various applications in the hospitality, healthcare, and educational sectors. This advanced system provides reliable hot water with enhanced performance while promoting energy conservation and sustainability.

One of the standout features of the Lochinvar 151 - 801 is its powerful heating capability. With a robust heating input of up to 150,000 BTU per hour, it ensures a steady supply of hot water even during peak demand times. The efficient heat exchanger design optimizes thermal performance, allowing for quicker recovery rates, which is essential for facilities requiring substantial hot water usage.

This model integrates cutting-edge technologies to maximize energy efficiency. Utilized in the Lochinvar 151 - 801 is the Smart System control technology, which provides precise temperature management and diagnostics. This feature not only enhances operation efficiency but simplifies service and maintenance by providing real-time data and alerts, leading to reduced downtime.

Additionally, the Lochinvar 151 - 801 employs a stainless-steel tank construction that promotes durability and robustness. The tank is adequately insulated to minimize heat loss, thus keeping energy costs down. Its compact design also allows for easy installation in various spaces, including those with limited footprints.

Moreover, the unit features advanced combustion technology, including a modulating gas valve that adjusts the flame size according to demand, promoting even greater efficiency. This ensures that the water heater operates at optimum performance levels, reducing fuel consumption while ensuring a consistent supply of hot water.

Safety is a primary concern for Lochinvar, and the 151 - 801 model includes several integrated safety features, such as an ignition safety shutoff and a temperature/pressure relief valve. These systems work together to provide peace of mind while ensuring the unit operates safely within its designated parameters.

In conclusion, the Lochinvar 151 - 801 is an exemplary choice for commercial applications, offering powerful performance, efficient technologies, durable construction, and enhanced safety features. With its combination of high output and advanced monitoring capabilities, it stands as a reliable solution for organizations seeking an effective hot water heating solution.
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