Lochinvar 81-286 Control modes, Ramp Settings, Controlling Sensor, BMS Thermostat Input

Page 24

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

24

Page 23 Page 25
Image 24
Page 23 Page 25
Contents Models 81 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 boiler display Navigation DialControl inputs LOW Voltage Connection BoardSmart Control Module Control outputsAccess modes General OperationHow the boiler operates 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 DisplayDescription See User Access Installer Access Display Modify Parameter tableMenu DHW Settings Resetoutdoor See User Access Installer Access Display Modify DescriptionBMS Service Notification Temperature units C / F Viewable and changeable control parametersTime and Date Software VersionTemperature Settings Data LoggingFunctions DHW Settings Outdoor Reset Anti-Cycling Ramp Settings Control modesControlling Sensor BMS Thermostat InputCascade Offset Minimum On/Off TimeCirculation pumps Service Notification Maintenance Maintenance and annual startup Service technicianInstructions 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 Check flame signalCleaning boiler heat exchanger Review with ownerOiled bearing circulators Kit Part Component Number DescriptionTroubleshooting Before troubleshootingCheck control module fuses Check the followingNo Display No BurnerOperation Unit DoesChecking temperature sensors Temperature Resistance Temperature ResistanceResistance Temperature Noisy No PumpBoiler Pump System Pump DHW PumpTroubleshooting Temp Sw OpenApplies to the 286 Model Only Anti-cyclingCont’d Flame SequenceOutlet Arhl Outlet MrhlFan Low/High Fan Speed LowHigh GV/RelayFault Sensor ShortedLouver Proving Inlet SensorFlue Sensor Fault Fatal ErrorMemory Error Flue Temp DiffFlue Temp High Delta T HighOutlet Temp Service Blk Rem Ctrl FltParameters Progr Combustion Analysis Procedure Gas valve adjustment procedure Gas Valve AdjustmentOr Obstruction Gas Supply Pressure
Related manuals
Manual 16 pages 58.01 Kb

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.
Top Page Image Contents