Lochinvar 151 operation manual Cascade, Sequence of the cascade, User, Installer

Page 61

Installation & Operation Manual

11 Operating information (continued)

Cascade

Access modes

When multiple water heaters are installed, they can be wired together in a cascade sequence. A maximum of eight water heaters can be controlled from a single control. In this application one water heater would be designated as the Leader control and all others would be designated as Member controls. If installing the water heaters in an existing system, the new water heater should be programmed as the Leader and/or the higher number addresses. The Leader control can be programmed to use Lead/Lag or Efficiency Optimization control methods.

Once the Leader water heater receives a call for heat from a tank sensor, BMS or Modbus, the control will determine what the set point will be. A fixed temperature set point can be programmed into the control. See page 57 of this manual to program the set point.

If the water temperature at the tank is less than the set point - differential, then the control will initiate a call for heat on the Cascade (see the Armor Water Heater Service Manual for an explanation of the differential). The Leader will energize the lead water heater on the Cascade. For a new startup this will be the Leader water heater.

Sequence of the cascade

To equalize the runtime of all water heaters on the Cascade, the firing sequence will automatically be changed at set intervals.

For the first 24 hours after initializing the Cascade, the sequence will be changed every hour. After that the sequence will be changed once every 24 hours. The switching on/off sequence will be as follows:

User

The user can adjust tank target temperatures by pressing the NAVIGATION dial when “SETPOINTS” is flashing at the bottom of the display. The date and time, and the temperature units can also be changed (see page 58).

Installer

Most parameters are available only to the installer, accessible by entering the installer password, see the Armor Water Heater Service Manual.

Saving parameters (reference the Parameter Table in the Armor Water Heater Service Manual)

NOTICE

Please note that the brackets ([]) denote

 

screen status.

 

To save parameters and exit programming:

Press the RIGHT SELECT [SAVE] key and then press the RIGHT SELECT [HOME] key.

To enter a parameter and continue programming:

Press the RIGHT SELECT [SAVE] key 1 time to return to the parameter listings; press again to return to the menu listings. Remember to press the RIGHT SELECT [HOME] key when finished programming in order to save the changes made.

See the Armor Water Heater Service Manual for a detailed description of parameters and access modes.

DAY

SWITCHING ON SEQUENCE

 

 

Day 1

L-M1-M2-M3-M4-M5-M6-M7

 

 

Day 1 + 1 hour

M1-M2-M3-M4-M5-M6-M7-L

 

 

Day 1 + 2 hour

M2-M3-M4-M5-M6-M7-L-M1

 

 

Night Setback operation with cascade

Night Setback operation of the water heaters within the Cascade is available. Programming of the Night Setback will be done through the Leader water heater. Refer to the Armor Water Heater Service manual for information regarding Night Setback.

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Contents What to do if YOU Smell GAS Installation&OperationManual Models 151Contents Please read before proceeding When servicing the water heaterStainless steel heat exchanger Armor Water Heater How it worksModels 151 Models 601 Models 400CSA RatingsCloset and alcove installations Installation must comply withDetermine water heater location Before locating the water heater, check1Closet Installation Minimum Required Clearances Provide air openings to room Residential garage installationVent and air piping Flooring and foundationAreas likely to have contaminants Products to avoidDetermine water heater location Gas conversions Prepare water heaterRemove water heater from wood pallet Models 151Model 3Installing Propane Orifice ModelLeveling the water heater Models 601Direct venting options Sidewall Vent General ventingDirect venting options Vertical Vent, Sidewall Air Direct venting options Vertical VentRequirements for installation in Canada Install vent and combustion air pipingInstalling vent or air piping PVC/CPVC Vent piping materialsVent Pipe, and Fittings PVC/CPVC Air intake/vent connectionsStainless steel vent Air inlet pipe materialsFlue Stainlesssteelairintake/ventconnectionsFlue Intake Air Adapter Termination Model Kit NumberModel Air Intake Vent Removing from existing ventVent and air system Vent, air piping and termination Optional room airModel Kit Number Description Air contaminationSidewall direct venting If using the alternate sidewall terminationVent/air termination sidewall Determine location3AClearance to Gravity Air Inlets Seal all wall cavities Prepare wall penetrationsMultiple vent/air terminations Prepare wall penetrations Alternate Field Supplied OptionTermination and fittings Sidewall termination optional concentric vent Models 151 Sidewall termination installationDescription and usage 11 Concentric Multiventing sidewall terminations 13Concentric Vent Sidewall AttachmentVent/air termination vertical Vertical direct ventingMultiple vent/air terminations Prepare roof penetrationsVertical termination optional concentric vent Models 151 Vertical termination installationMinimum Combustion AIR Typical Multiventing vertical terminationsConcentric Venting Arrangement Alternate vertical concentric venting10Existing Vent as a Chase Existing vent as a chaseFlow switch adjustment Flow switch and relief valve installationSystem piping System water piping methodsPiping components ScaldingWater chemistry 4Single Heater Single Tank 2 Temperature Cold Water Supply Cold Water Supply Number of Units Model 8Double Heater Double Tank Gas connections Connecting gas supply pipingPropane gas Natural gasCheck inlet gas supply Single Unit Natural Gas Pipe Capacity ChartLength of Pipe in Straight Feet for 1/2 PSI Gas pressure Gas valve replacementInstallation must comply with Field wiringLine voltage connections Low voltage connectionsLouver proving switch Tank thermostat Low gas pressure switchHigh gas pressure switch Flow switchWiring of the cascade Alarm contactsRuntime contacts 3Low Voltage Field Wiring Connections Condensate drain Condensate disposalCheck for gas leaks Inspect/fill condensate system Start-upChlorine concentration less than 200 ppm Inspect/check condensate lines and fittingsStart the water heater Final checks before starting the water heaterIf water heater does not start correctly Check system and water heaterFor Your Safety Read Before Operating 3Operating Instructions Models 400 Verify WHR circulator mode Set tank set point temperatureSet water heater operation Natural Gas PropaneSet clock Configuration of the cascadeGeneral Operating informationWater heater temperature regulation Cascade InstallerSequence of the cascade UserOperation Display Sequence of operation1Control Panel Armor water heater control moduleWater heater Information Dial Function Service technician Maintenance Maintenance and annual startupOwner maintenance Maintenance Check all water heater wiring Check ignition ground wiringCheck control settings Check water systemCleaning heat exchanger Check flame signalPerform start-up and checks Check burner flameOiled bearing circulators Check Delta TModel Kit Part Component Number Description PC Interface Diagrams2Wiring Diagram Page Page AWII-I-O Rev C
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151 specifications

Lochinvar 151,286 is a notable model in the realm of commercial water heating solutions, designed primarily for large-scale applications. This model incorporates advanced technologies and features that set it apart in terms of efficiency, usability, and reliability.

One of the hallmark features of Lochinvar 151,286 is its high-efficiency system that leverages condensing technology. This technology enables the unit to extract additional heat from exhaust gases, allowing it to operate at an impressive annual fuel utilization efficiency (AFUE) rating. This not only reduces energy consumption, but it also significantly lowers operational costs.

The Lochinvar 151,286 is equipped with a robust stainless steel heat exchanger, which provides both durability and enhanced thermal efficiency. This design withstands the rigors of high-demand environments, making it ideal for restaurants, schools, hospitals, or any facility requiring consistent hot water supply. Its compact footprint allows it to be installed in tight spaces without sacrificing performance.

Another standout characteristic is its intelligent control system. The built-in touchscreen interface offers users an intuitive way to manage settings, monitor performance, and troubleshoot issues. This smart technology aids in simplifying maintenance and improves overall system reliability. The unit also features advanced safety protocols, including multiple sensors that monitor operation and provide alerts in case of irregular performance.

In terms of capacity, the Lochinvar 151,286 can deliver an impressive output, accommodating varying demands with ease. Its innovative modulation capabilities allow the unit to adjust its heating output based on real-time hot water needs, ensuring unmatched comfort and efficiency.

Supporting the model’s performance are versatile connectivity options. Lochinvar 151,286 can integrate seamlessly with building management systems, allowing facility managers to monitor and control heating processes remotely. This level of connectivity not only enhances control but also supports energy-saving strategies across the facility.

In conclusion, Lochinvar 151,286 stands out as a premium choice for commercial water heating needs. With its high-efficiency ratings, durable construction, intelligent control system, impressive capacity, and versatile connectivity, it ensures that hot water is delivered reliably and efficiently, meeting the demands of modern businesses while reducing energy costs. This combination of technology and design makes it an essential component for any large-scale facility focused on performance and sustainability.
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