Lochinvar 151 - 801 service manual Check flame signal, Review with owner, Cleaning heat exchanger

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6. Use a vacuum cleaner to remove any accumulation on the water heater heating surfaces. Do not use any 2. solvent.
Table 2C Water Heater Pump Applications / Recommended Temperature Rise
1. Check the Delta T using Table 2C as a reference.

Service Manual

2Maintenance (continued)

Check flame signal

1.At high fire the flame signal shown on the display should be at least 10 microamps.

2.A lower flame signal may indicate a fouled or damaged flame sense electrode. If cleaning the flame sense electrode does not improve, ground wiring is in good condition, and ground continuity is satisfactory, replace the flame sense electrode.

3.See Section 3 - Troubleshooting in this manual for other procedures to deal with low flame signal.

Review with owner

1.Emphasize the need to perform the maintenance schedule specified in this manual.

2.Remind the owner of the need to call a licensed contractor should the water heater or system exhibit any unusual behavior.

7.Brush the heat exchanger while dry using a nylon bristle brush. Caution: DO NOT use a metal brush. Re-vacuum the heat exchanger.

8.Finish cleaning using a clean cloth dampened with warm water. Rinse out debris with a low pressure water supply.

9.Allow the heat exchanger to thoroughly dry.

10.Remove the field supplied rear refractory cover from the back of the combustion chamber of the heat exchanger and reassemble.

11.Close isolation valves on piping to isolate water heater from system. Attach a hose to the water heater drain and flush water heater thoroughly with clean water by using purging valves to allow water to flow through the water make-up line to the water heater.

12.Perform start-up and check-out procedures in the Check Flame and Combustion - Section 10 - Startup of the Installation and Operation Manual.

13.Replace the access cover and restore water heater to operation.

3.Remind the owner to follow the proper shutdown procedure and to schedule an annual start-up at the beginning of the next heating season.

Cleaning heat exchanger

For recommended materials; including brush, appropriate extension(s), refractory cover, and detailed instructions see Table 2B - Heat Exchanger Cleaning Kits.

1.Shut down water heater:

•Follow the “To Turn Off Gas to Appliance” instructions for the water heater in Section 10 - Startup of the Installation and Operation Manual.

•Do not drain the water heater unless it will be exposed to freezing temperatures. If using freeze prevention fluid in system, do not drain.

Table 2B Heat Exchanger Cleaning Kits

Model

 

Kit

Part

Component

Number

Number

Description

 

 

 

 

CTN20005

Rear Refractory Cover

151

 

 

 

 

 

 

MSC20083*

Nylon 4" Wheel Brush*

-

 

KIT30063

 

 

 

 

MSC20084

3mm Allen Wrench

400

 

 

 

 

 

 

 

 

 

MSC20086

1/4" x 24" Drill Extension

 

 

 

 

 

 

 

 

CTN20005

Rear Refractory Cover

501

 

 

 

 

 

 

MSC20083*

Nylon 4" Wheel Brush*

-

 

KIT30064

 

 

 

 

MSC20085

1/4" x 12" Drill Extension

801

 

 

 

 

 

 

 

 

 

MSC20086

1/4" x 24" Drill Extension

 

 

 

 

 

 

* Do NOT use a metal brush. Only use the kit

￿ CAUTION

 

 

provided brush or an equivalent replacement

 

 

 

 

nylon brush.

 

2. Allow time for the water heater to cool to room Check Delta T temperature if it has been firing.

3.Remove the nuts securing the heat exchanger access cover to the heat exchanger and set aside.

4.Remove the heat exchanger access cover, burner, and gas/air arm assembly.

￿WARNING The water heater contains ceramic fiber materials. Use care when

handling these materials per the instructions on page 3 of this manual. Failure to comply could result in severe personal injury.

5.Remove the condensate hose from the heat exchanger end. Connect a field supplied 3/4" diameter hose to a drain pan. Using field supplied means, cover the refractory in the back of the combustion chamber of the heat exchanger.

Water Heater Pump Applications

Model

*Pipe

Armstrong

Grundfos

Flow Rate

Loss

Temp.

Size

(GPM)

(FT/HD)

Rise

 

 

 

 

 

 

 

151

1-1/4"

E8

--

16

16.6

18°F

200

1-1/4"

E8

--

21

11.8

18°F

286

2"

E17

--

30

17.1

18°F

400

2"

E24

--

39

21

18°F

 

 

 

 

 

 

 

501

2"

E22

--

53

26

18°F

601

2"

E22

--

53

26

22°F

 

 

 

 

 

 

 

701

2"

--

TP 40-160

63

32

22°F

801

2"

--

TP 40-160

67

31

24°F

 

 

 

 

 

 

 

Oiled bearing circulators

1.The circulator shipped with the Armor water heater is water- lubricated. No oiling is required.

Check other circulators in the system. Oil any circulators requiring oil, following circulator manufacturer’s instructions. Over-oiling will damage the circulator.

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Contents Models 151 Contents Niosh stated First Aid Please read before proceedingHandling ceramic fiber materials 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 Owner maintenance Maintenance Maintenance and annual startupService technician 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 HighRem Ctrl Flt Service BlkOutlet Temp High Low 24 VAC Watch Dog ErrorNo Error Stored Fatal ErrorGas Supply Pressure Combustion Analysis ProcedureGas Valve Adjustment Or ObstructionModel Gas valve adjustment procedureModels 151 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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