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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Lochinvar 81-286 service manual Outdoor Reset
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81-286 specifications

Lochinvar 81-286 is a highly efficient and innovative heating solution that represents the latest advancements in boiler technology. This model, part of Lochinvar's prestigious line-up, is designed for commercial applications, delivering superior performance while emphasizing energy efficiency and user-friendly operation.

One of the standout features of the Lochinvar 81-286 is its robust construction. Built with high-quality materials, the unit is engineered for durability and reliability, ensuring long-term operation with minimal maintenance. Its compact design allows for versatility in installation, making it suitable for various building layouts and configurations.

The boiler's primary technology is its advanced condensing capability, which optimizes heat transfer and reduces energy consumption. By efficiently using the heat generated during combustion, the 81-286 can achieve higher thermal efficiencies, often surpassing traditional systems. This results in lower operating costs and reduced greenhouse gas emissions, aligning with the growing demand for sustainable energy solutions in commercial buildings.

Lochinvar incorporates intelligent control systems into the 81-286, featuring user-friendly interfaces that facilitate straightforward programming and monitoring. These control systems enable precise regulation of temperature and pressure, ensuring optimal operation while providing real-time feedback that aids in troubleshooting and maintenance. Users can enjoy the convenience of remote monitoring, enhancing the overall user experience.

Another key characteristic of the Lochinvar 81-286 is its capacity range. The model is available in various sizes, allowing it to meet the specific demands of different facilities, from small businesses to large industrial applications. This flexibility makes it a top choice for contractors and engineers seeking reliable heating solutions that cater to diverse needs.

In addition, the Lochinvar 81-286 boasts exceptional safety features, including built-in safeguards that protect against overheating and pressure surges. These aspects ensure that the unit operates within safe parameters, providing peace of mind for facility managers and operators.

In summary, the Lochinvar 81-286 combines durability, efficiency, and advanced technology, making it an ideal solution for commercial heating needs. With its innovative condensing design, intelligent controls, and safety features, this boiler stands out as a reliable choice for those seeking sustainable and effective heating solutions. Its versatility and performance make it a key player in today’s ever-evolving energy landscape.
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