Service Manual

1 Service

Ramp Settings

 

 

 

 

Control modes

 

 

Please note that the brackets ([]) denote

Controlling Sensor

 

NOTICE

 

screen status.

 

 

 

 

 

 

 

 

 

The SH controlling sensor parameter selects the sensor the

 

 

 

 

 

The SMART SYSTEM control can be programmed to limit

control will use to regulate the boiler firing rate. This parameter

is adjustable by the installer by accessing the Controlling Sensor

the firing rate for a fixed period of time at the start of a

parameter. The sensor selections are as follows:

The outlet

space heating demand. There are six (6) possible limits,

sensor regulates the firing rate based on the outlet water

each with their own time delay. The first limit applies as

temperature of the boiler and the inlet sensor regulates the

soon as the burner starts. Once its time delay expires, the

firing rate based on the inlet water temperature of the boiler.

second limit is applied and its timer begins. The control

If the outlet sensor is selected, and the optional system supply

steps through these limits until the 6th (sixth) limit expires.

sensor is connected, the control will regulate the

firing rate

Note, however, that the 6th limit will also limit the rate for

based on the system supply sensor temperature. The default

the rest of that heat demand. The installer can adjust the

sensor is the Outlet Sensor.

 

firing limits and time delays by accessing the Ramp Settings

 

 

 

parameter. Once this parameter is selected, the screen will

BMS Thermostat Input

 

show the step number, the time delay for that step and the

When controlling the boiler through the 0 - 10V BMS input or

limit value corresponding with that step. If the installer

through ModBus, the boiler can be enabled one of two ways.

wishes to adjust one of the values in that step, he can press

With the BMS Thermostat Input parameter set to ACTIVE,

the NAVIGATION dial until the value he wishes to change

the boiler will be enabled by closing the Heat/Loop Demand 1

is flashing. The installer can then rotate the NAVIGATION

input. When set to INACTIVE, the boiler will be enabled by the

dial to adjust that value. If the installer

presses the RIGHT

voltage level on the 0 - 10V input (in the case of 0 - 10V BMS

SELECT [SAVE] key while the

limit

value is

flashing,

control), or the 0 - 10V input value received through ModBus.

the step value will flash again.

The

installer

can then

The default value is INACTIVE.

 

select the next step and adjust the delay and limit values

 

 

 

corresponding with that step.

 

 

 

BMS

 

When finished, the installer can press the RIGHT SELECT

The set point or modulation of the boiler may be controlled

[SAVE] key to store the new settings, or the LEFT SELECT

through the 0 - 10V BMS input or through ModBus. When the

[EXIT] key to return to the Anti-Cyclingparameter list

BMS parameter is set to INACTIVE, the 0 - 10V input will be

without saving the changes. The delay value can be set

ignored. When set to ACTIVE, the set point or modulation will

between 0 minutes and 20 minutes. The limit value can be

be controlled by the voltage on the 0 - 10V input (in the case

set between 0% and 100%.

 

 

 

of 0 - 10V BMS control), or the 0 - 10V input value received

 

 

 

 

 

through ModBus. The default value is INACTIVE.

 

Figure 1-2Ramp Delay Interval

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Lochinvar 801, 400 service manual Control modes, Ramp Settings, Controlling Sensor, BMS Thermostat Input
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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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