Lochinvar 399 - 800 service manual BLR SH 41% Rate

Page 12

Service Manual

1Service

Sequence of operation (continued)

Table 1A (continued from previous page) Sequence of operation - space heating and DHW

 

OPERATION

DISPLAY

 

 

8. If the boiler is not part of a cascade, and the DHW call for heat

 

 

remains active for more than 30 minutes, and the space heating

 

 

call for heat is also active, then the control will turn on the boiler

BLR: SH 41% RATE

 

pump, turn off the DHW pump after 2 seconds, and resume

 

modulating based on the space heating set point. As long as

OUT: 123.0F(129)

 

both the space heating and DHW calls for heat remain active,

 

 

 

the control will switch back and forth between the two modes

 

 

until one of them is satisfied.

 

 

 

9. Once both calls for heat are satisfied, the control will turn off the

BLR: POSTPURGE

 

burner. The blower will remain on for the 10 second postpurge

 

cycle. Any pumps that are running will continue to run for their

OUT: 127.4F(129)

 

respective pump delay times, then turn off.

 

 

 

10.

Boiler pump off, system pump continues its delay if longer.

BLR: Standby

 

 

OUT: 124.7F(129)

11.

System pump off.

BLR: Standby

 

 

OUT: 122.9F(129)

12

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Contents Models 399 Contents Please read before proceeding Handling ceramic fiber materialsNiosh stated First Aid When servicing boiler What is in this manual? ServiceMaintenance TroubleshootingService Near boiler pipingKnight XL display Menu / Exit UP DownControl inputs Smart Control Module Control outputsGeneral Operation How the boiler operatesHow the control module operates Sequence of operationSequence of operation BLR IgnitionBLR SH 41% Rate Display panel menu access Use this procedure to access menus from the display panelDisplay panel parameter access Value will appearTemperature Data Parameter tableControl Circulation Service Temperature settings Viewable and changeable control parametersDHW settings Outdoor air resetData logging FunctionsMaximum air temperature Shift reset curveMaximum SH set point Minimum SH set pointAnti-cycling Control modes SH controlling sensorSH source Boiler cascade addressService Notification Cascade offsetCirculation pumps Maintenance Maintenance and annual startup Service technicianOwner maintenance Maintenance Flue vent system and air piping Check water systemCheck expansion tank Check boiler relief valveCheck ignition ground wiring Check all boiler wiringCheck control settings Inspect ignition and flame sense electrodesCheck flame signal Cleaning boiler heat exchangerReview with owner Troubleshooting Before troubleshootingCheck control module fuses Check the followingNo Display No BurnerOperation Unit Does NotChecking temperature sensors Temperature ResistanceNoisy No PumpOperation Boiler Pump System PumpSwitch/LWCO FlowFlame SequenceAnti-cycling No Flame IgnNo Flame RunningAdjustable High Limit w/ManualFan Low Fan Speed LowFan High Fan Speed HighSensor Open Sensor ShortedTemp O/Shoot Rem Ctrl Flt ParametersProgr OpenService Blk Watch Dog ErrorNo Error Stored Low 24 VACCombustion Analysis Procedure Gas Valve AdjustmentOr Obstruction Gas Supply PressureGas valve adjustment procedure ModelModels 600 Page Page KBX-SER Rev E
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399 - 800 specifications

Lochinvar is known for its cutting-edge water heating and boiler systems, and the Lochinvar 399 - 800 series is no exception. Specifically designed for commercial applications, this series brings advanced technology and engineering to the forefront of hydronic heating solutions.

One of the standout features of the Lochinvar 399 - 800 series is its impressive efficiency. Equipped with a condensing design, these boilers utilize high-efficiency stainless steel heat exchangers that allow for maximum heat transfer while minimizing energy consumption. With an impressive thermal efficiency of up to 96%, the Lochinvar 399 - 800 series stands out in its class, offering significant energy savings and reduced operational costs over time.

Another key characteristic of this series is its robust construction. Designed with longevity in mind, the boilers are built using high-quality materials that withstand extreme temperatures and pressures. The stainless steel design not only enhances durability but also combats corrosion, ensuring a long service life and reduced maintenance costs for users.

The Lochinvar 399 - 800 series also incorporates advanced control technologies. With its intuitive control system, users can easily adjust and monitor heating parameters, ensuring optimal performance and comfort. The integrated Control Wizard feature simplifies the setup process, allowing for quick commissioning and troubleshooting. Additionally, the optional Lochinvar SMART CONTROL technology provides remote monitoring capabilities, allowing operators to keep track of system performance from anywhere.

Versatility is another hallmark of the Lochinvar 399 - 800 series. These boilers come in a range of sizes, with the ability to modulate output based on real-time heating demands. This flexibility ensures that systems can operate efficiently under varying load conditions, making them ideal for schools, hospitals, and commercial buildings requiring consistent hot water availability.

In summary, the Lochinvar 399 - 800 series exemplifies modern boiler technology, combining energy efficiency, durability, advanced controls, and versatility. As businesses and facilities seek to enhance their heating systems, the Lochinvar 399 - 800 offers a reliable and forward-thinking solution for today's energy-conscious environment. Investing in this state-of-the-art boiler system not only improves comfort but also fosters sustainability and cost-effectiveness in commercial heating applications.
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