1 Service (continued)

HWG Minimum User Set Point

This setting controls the minimum user set point for the tank temperature. The installer can adjust this by accessing parameter B10.

HWG Maximum User Set Point

This setting controls the maximum user set point for the tank temperature. The installer can adjust this by accessing parameter B11.

HWG Boiler Set Point

When a HWG call for heat becomes active, the control will use the HWG boiler set point to determine the firing rate of the boiler based on the boiler outlet water temperature.

This parameter can be changed by the installer by accessing parameter B12.

HWG Boiler Offset

This parameter reflects the degrees above HWG boiler set point the outlet temperature can go before the boiler will shut off. This parameter can be changed by the installer by accessing parameter B13.

HWG Boiler Differential

This parameter reflects the degrees below HWG boiler offset the outlet temperature has to go before the boiler turns on. This parameter can be changed by the installer by accessing parameter B14.

Service Manual

C: Outdoor Reset

SH Set Point at Low Outdoor Temperature

When the outdoor air temperature drops to or below the Low Outdoor Temperature setting (parameter C3), the water temperature will be at this setting (see FIG. 1-6). However, if the user set point is set lower, the water temperature will be limited by the user set point instead. This parameter can be changed by accessing parameter C1.

SH Set Point at High Outdoor Temperature

When the outdoor air temperature rises to or above the High Outdoor Temperature setting (parameter C4), the water temperature will be at this setting (see FIG. 1-6). This parameter can be changed by accessing parameter C2.

Low Outdoor Temperature

When the outdoor air temperature drops to its minimum (C3), the water temperature will be at parameter C1 (FIG. 1-6). As the outdoor temperature continues to drop, the water temperature set point will continue to rise. However, if the user set point is set lower, the water temperature will be limited by the user set point instead. This parameter can be changed by accessing parameter C3.

High Outdoor Temperature

When the outdoor air temperature rises to or above this set point, the water temperature will be at parameter C2 (FIG. 1-6). This parameter can be changed by the installer by accessing parameter C4.

Outdoor Air Shutdown

When the outdoor temperature rises above this point, the control will block all SH demands (HWG demands will still be active). This parameter can be changed by the installer by accessing parameter C5.

Figure 1-6Outdoor Air Reset Curve

SET POINT AT

LOW OUTDOOR

TEMPERATURE

(SH)

SET POINT

SET POINT AT

HIGH OUTDOOR

TEMPERATURE

HIGH OUTDOOR

TEMPERATURE

LOW OUTDOOR

TEMPERATURE

19

Page 19
Image 19
Lochinvar 1.5, 3.5, 2.5 service manual Outdoor Reset

3, 2, 3.5, 2.5, 1.5 specifications

Lochinvar is a leader in manufacturing high-efficiency water heating solutions, and their Lochinvar 1.5, 1.3, and 1.0 models exemplify the company's commitment to innovation and performance. These advanced heating systems are designed to meet the diverse needs of commercial and residential applications, providing reliable hot water while ensuring energy efficiency and environmental sustainability.

The Lochinvar 1.5, 1.3, and 1.0 models incorporate cutting-edge technologies that set them apart from traditional water heaters. One of the most notable features is their use of high-efficiency condensing technology, which extracts maximum heat from the combustion process. This process allows the units to achieve high thermal efficiencies, often exceeding 95%, which not only reduces energy costs but also lowers greenhouse gas emissions.

In terms of design, Lochinvar's models are constructed with durable materials, ensuring longevity and reliability in demanding environments. The stainless steel heat exchanger is a key element that contributes to the durability and performance of the units. This material is resistant to corrosion and scale build-up, enhancing the lifespan of the heater and reducing maintenance requirements.

The Lochinvar 1.5, 1.3, and 1.0 models feature advanced control systems that provide precise temperature management and easy operation. The intuitive digital display allows users to monitor performance metrics, temperature settings, and energy consumption with ease. Additionally, these units are equipped with intelligent modulating gas valves that optimize fuel usage based on demand, ensuring efficient operation across various load conditions.

Safety is a priority in the design of Lochinvar's water heaters. The models come with built-in safety features, including flame failure detection, overheat protection, and venting safeguards. These systems work together to ensure the safe operation of the units, giving users peace of mind.

Another characteristic that makes the Lochinvar 1.5, 1.3, and 1.0 models popular among users is their compact design. These units are engineered to fit in tight spaces, making them ideal for installations where space is at a premium. Despite their small footprint, they deliver powerful performance, ensuring that users have access to the hot water they need.

In summary, Lochinvar's 1.5, 1.3, and 1.0 water heating models represent the pinnacle of efficiency, safety, and reliability. With their advanced technologies, durable construction, and user-friendly features, these units are an excellent choice for anyone seeking a high-performance water heating solution.