Lochinvar 801, 400 service manual Outdoor Reset

Page 22

 

 

Service Manual

 

 

 

1 Service

 

 

Outdoor Reset

Set Point (1 - 3) at Low Outdoor Temperature

The option of controlling up to three (3) different outdoor

When the outdoor air temperature drops to the Outdoor

(1 - 3) Low parameters, the calculated set point will be at

resets for low outdoor temperatures is available.

this setting (FIG. 1-1). If the outdoor air temperature drops

 

Outdoor (1 - 3) Low

further, the set point will continue to increase above this

setting. However, if SH1, SH2, and SH3 are set lower, the

When the outdoor air temperature drops to this point, the

water temperature will be limited by these set points instead.

These parameters can be changed by the installer by accessing

water temperature will be at the Set point 1 at Low Outdoor

the Set point 1 at Low Outdoor Temp 1, Set point 2 at Low

Temp 1, Set point 2 at Low Outdoor Temp 2 and Set point

Outdoor Temp 2 and Set point 3 at Low Outdoor Temp 3

3 at Low Outdoor Temp 3 parameters (FIG. 1-1). If the

parameters. The temperature range of this parameter is 68°F

outdoor air temperature drops further, the set point will

(20°C) to 180°F (82°C). The default value is 180°C (82°C).

continue to increase above this setting. This parameter can

Set Point (1 - 3) at High Outdoor Temperature

be changed by the installer by accessing the Outdoor (1-3)

Low parameter. The temperature range of this parameter is

When the outdoor air temperature rises to or above Outdoor

-39°F (-39°C) to high outdoor temperature set point. The

(1 - 3) High parameters, the calculated set point will be at this

default value is 25°F (-4°C).

setting (FIG. 1-1). These parameters can be changed by the

 

Outdoor (1 - 3) High

installer by accessing the Set point 1 at High Outdoor Temp 1,

Set point 2 at High Outdoor Temp 2 and Set point 3 at High

When the outdoor air temperature rises to or above this

Outdoor Temp 3 parameters. The temperature range of this

parameter is 68°F (20°C) to 190°F (88°C). The default value

point, the water temperature will be at the Set point 1 at High

is 70°F (21°C).

Outdoor Temp 1, Set point 2 at High Outdoor Temp 2 and

Outdoor Air Shutdown (SH1 - SH3)

Set point 3 at High Outdoor Temp 3 parameters (FIG. 1-1).

This parameter can be changed by the installer by accessing

When the outdoor temperature rises above this point, the

the Outdoor (1-3) High parameter. The temperature range

control will block all SH demands (DHW demands will still

of this parameter is low outdoor temperature set point to

be active). These parameters can be changed by the installer

104°F (40°C). The default value is 70°F (21°C).

by accessing the Outdoor Air Shutdown SH1, SH2, and SH3

 

 

parameters. The temperature range of this parameter is 32°F

 

(0°C) to 104°F (40°C). The default value is 70°F (21°C).

 

 

 

Figure 1-1Outdoor Air Reset Curve

 

 

 

SET POINT AT

 

LOW OUTDOOR

 

TEMPERATURE

 

(SH1, SH2, SH3)

 

SET POINT

 

SET POINT AT

 

HIGH OUTDOOR

 

TEMPERATURE

 

HIGH OUTDOOR

 

TEMPERATURE

22

LOW OUTDOOR

TEMPERATURE

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Contents Models 400 Contents Handling ceramic fiber materials Please read before proceedingNiosh stated First Aid When servicing boiler Maintenance What is in this manual?Service TroubleshootingService Near boiler pipingKnight XL display Navigation DialControl inputs LOW Voltage Connection BoardSmart Control Module Control outputsHow the boiler operates Access modesGeneral Operation How the control module operatesOperation Display From previous page Sequence of Operation Display panel menu access Button Screen Operation Display StatusDisplay panel parameter access Button Screen Status Operation DisplayParameter table Description See User Access Installer Access Display ModifyMenu DHW Settings Resetoutdoor See User Access Installer Access Display Modify DescriptionBMS Service Notification Time and Date Temperature units C / FViewable and changeable control parameters Software VersionData Logging Temperature SettingsFunctions DHW Settings Outdoor Reset Anti-Cycling Controlling Sensor Ramp SettingsControl modes BMS Thermostat InputCascade Offset Minimum On/Off TimeCirculation pumps Service Notification Service technician Maintenance Maintenance and annual startupOwner maintenance Maintenance Check expansion tank Flue vent system and air pipingCheck water system Check boiler relief valveCheck control settings Check ignition ground wiringCheck all boiler wiring Inspect ignition and flame sense electrodesReview with owner Check flame signalCleaning boiler heat exchanger Model Kit Part Component Number DescriptionCheck control module fuses TroubleshootingBefore troubleshooting Check the followingOperation No DisplayNo Burner Unit DoesWire Color R/BK and Y Wire Color G and Y Checking temperature sensorsTemperature Resistance Temperature Resistance Resistance TemperatureBoiler Pump NoisyNo Pump System PumpTroubleshooting Anti-cycling Temp SwOpen Flame Fail IgnCont’d Flame SequenceOutlet Arhl Outlet MrhlHigh Fan Low/HighFan Speed Low GV/RelayLouver Proving FaultSensor Shorted Inlet SensorMemory Error Flue Sensor FaultFatal Error Flue Temp DiffDelta T High Flue Temp HighOutlet Temp No Error Stored Service BlkWatch Dog Error Rem Ctrl FltCombustion Analysis Procedure Model Gas valve adjustment procedureModels 601
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400, 801 specifications

The Lochinvar 801,400 is a cutting-edge solution in the realm of high-efficiency commercial water heating. This model represents a significant advancement in the design and functionality of water heaters, catering primarily to the demands of large-scale facilities like hotels, hospitals, and large industrial operations.

One of the standout features of the Lochinvar 801,400 is its impressive heating capacity, which can produce up to 801,400 BTUs, making it suitable for high-demand applications. This output is crucial for establishments that require a consistent supply of hot water, such as commercial kitchens and laundry facilities. The robust design ensures that it can handle peak demand periods without compromising performance.

Another significant aspect is the innovative use of advanced technology in its operation. The Lochinvar 801,400 integrates smart controls that enhance its efficiency and ease of operation. These controls allow for precise monitoring and adjustment of water temperatures, ensuring that the system operates within optimal parameters while maximizing energy savings. The intelligent monitoring system can provide real-time updates, making it easier for facility managers to keep track of performance and address maintenance needs proactively.

The construction of the Lochinvar 801,400 incorporates durable materials that not only enhance the longevity of the unit but also offer resistance to corrosion and wear. This durability translates into lower maintenance costs and an extended lifespan for the unit, making it a worthwhile investment for businesses.

Moreover, the Lochinvar 801,400 is designed with energy efficiency in mind. It boasts a high thermal efficiency rating, which reduces operational costs and minimizes the carbon footprint of heating operations. This efficiency is critical in today’s environmentally conscious market, where businesses are seeking to reduce their energy consumption and comply with strict regulations.

The design of the Lochinvar 801,400 also prioritizes safety, featuring innovative safety controls and fail-safes that protect both the unit and the users.

In summary, the Lochinvar 801,400 offers a combination of high capacity, advanced technology, durability, and energy efficiency, making it an excellent choice for commercial water heating solutions. As industries continue to evolve, the demand for reliable and efficient water heating solutions like the Lochinvar 801,400 will only increase.
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