Lochinvar 5 operation manual Sequence of the cascade, HW operation with cascade

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10 Operating information

If the water temperature at the system supply sensor is less than the set point + the turn-off offset - the off-on differential, then the control will initiate a call for heat on the Cascade (see the SYNC Service Manual for an explanation of the offset and differential). The Leader will energize the lead boiler on the Cascade. For a new startup this will be the Leader boiler.

The boiler will fire at its ignition speed and will then modulate its firing rate to maintain the set point. If the first boiler reaches 100% of its firing rate, the Leader will calculate at what point the second boiler could fire at 10% of its firing rate. At this point, the Leader will fire the second boiler on the Cascade. For a new startup, this would be the first Member boiler. The boiler will fire at its ignition speed and will then modulate its firing rate to maintain the set point.

If the set point still cannot be met, the Leader will continue firing more Members until either the heat demand is met or all boilers on the Cascade are firing. As the heat demand decreases, the last boiler on will modulate down to 10% of its firing rate. Once the demand for that boiler is zero, it will shut down. As the heat demand decreases further, the second to last boiler will modulate down and shut off. This will continue until the demand is satisfied and all boilers are shut off.

Sequence of the cascade

To equalize the run time of all boilers 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:

DAY

SWITCHING ON SEQUENCE

 

 

Day 1

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

Day 1 + 1 hour

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

 

 

Day 1 + 2 hours

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

 

 

Installation & Operation Manual

HW operation with cascade

For HW operation any boiler(s) in the Cascade can be selected to provide heat for a HW call. Select a boiler to be designated as the HW boiler. Connect the HW thermostat or sensor to the terminals on the Low Voltage Connection Board marked for the HW Thermostat or sensor. When the boiler receives a HW call, the Leader control will take that boiler out of the Cascade sequence. If another boiler is available, the Leader will start it up to take its place.

The HW boiler will adjust its set point to the programmed HW set point and will adjust its firing rate to maintain this. Once the HW call has been satisfied, the Leader control will place that boiler back into the Cascade sequence.

Night Setback operation with cascade

Night Setback operation of the boilers within the Cascade is available. Programming of the Night Setback will be done through the Leader boiler. Refer to the SYNC Service Manual for information regarding Night Setback.

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Contents Save this manual for future reference Contents When servicing boiler Please read before proceedingSync How it works BlowersModels 1.0 1.3 Ratings SyncInstallation must comply with Closet and alcove installationsDetermine boiler location Before locating the boiler, check1Closet Installation Minimum Required Clearances Prevent combustion air contamination Provide air openings to roomFlooring and foundation Products to avoid When using an existing vent system to install a new boilerAreas likely to have contaminants When removing a boiler from existing common vent system Remove boiler from wood pallet5Combustion Air Through Ducts Minimum Recommended Combustion AIR Supply to Equipment Room Direct venting options Sidewall Vent General ventingDirect venting options Vertical Vent Install vent and combustion air piping Air intake/vent connectionsRequirements for installation in Canada SizingMaterials Air inlet pipe materialsOptional room air Material Standard Vent pipeVent fittings PrimerPolypropylene Centrotherm InnoFlue SW Duravent PolyproStainless steel vent Supplied with the vent systemVent/air termination sidewall Sidewall direct ventingDetermine location 2B Alternate Clearance to Gravity Air Inlets Prepare wall penetrations Found in this manualPrepare wall penetrations Alternate Field Supplied Options Multiple vent/air terminationsVent/air termination vertical Vertical direct ventingPrepare roof penetrations 3Vertical Terminations with Multiple Boilers Hydronic piping Near boiler piping connections Circulator sizingHot Water Generator pump sizing ExampleNear boiler piping components 5Single Boiler Primary/Secondary Piping Model Number of Units Manifold Pipe Sizes in Inches mm Connecting gas supply piping Gas connectionsNatural gas Propane GasGAS Piping Size Chart Check inlet gas supplyGas valve replacement Gas PressureInstallation must comply with Field wiringLine voltage connections Enable Outdoor temperature sensorLouver proving switch Flow switch field suppliedSystem supply sensor Wiring of the cascade Alarm contactsBoiler management system Runtime contacts3Low Voltage Field Wiring Connections Condensate disposal Condensate drainFreeze protection when used Start-upCheck/control water chemistry Fill and test water systemCheck for gas leaks Check thermostat circuitsInspect/fill condensate system Inspect/check condensate lines and fittingsFinal checks before starting the boiler Start the boilerIf boiler does not start correctly Check system and boilerFor Your Safety Read Before Operating Set space heating operation Natural Gas PropaneConfiguration of the cascade Set Hot Water Generator HW operationOperating information GeneralProtection features Outdoor reset operation, if used Boiler temperature regulationCascade HW operation with cascade Sequence of the cascadeNight Setback operation with cascade Sequence of operation Sync control module 1Status ScreenOperating information 2Main Menu Screen Maintenance Maintenance and annual startup Service technicianOwner maintenance See the Sync User’s Information Manual for InstructionsMaintenance 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 Model Kit Part Component Number DescriptionHandling ceramic fiber materials Niosh stated First AidDiagrams LOW Voltage 120 VAC High Voltage2Ladder DiagramPart 3Wiring Diagram Page
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5 specifications

Lochinvar 5 is a cutting-edge residential boiler designed to meet the heating needs of modern homes while ensuring high efficiency and user convenience. As one of the latest offerings from Lochinvar, a trusted name in the heating industry, the Lochinvar 5 combines advanced technology with robust features that make it a top choice for homeowners and contractors alike.

One of the standout characteristics of the Lochinvar 5 is its impressive energy efficiency. It boasts an AFUE (Annual Fuel Utilization Efficiency) rating of up to 95%, which significantly reduces fuel consumption compared to traditional heating systems. This not only translates to lower energy bills for homeowners but also minimizes the environmental impact, aligning with the growing demand for sustainable energy solutions.

The Lochinvar 5 employs a highly efficient modulating burner technology that optimizes fuel usage based on real-time heating demand. This ensures that the boiler operates at peak efficiency, providing consistent warmth without unnecessary energy waste. The inclusion of advanced controls further enhances its performance, allowing users to adjust settings easily and monitor usage through a user-friendly digital display.

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Safety is a key consideration in the design of Lochinvar 5. It includes multiple safety features, such as a sealed combustion system that minimizes the risk of carbon monoxide leaks and an advanced monitoring system that ensures optimal operating conditions at all times.

In conclusion, the Lochinvar 5 stands out as an exceptional choice for those seeking a reliable, efficient, and smart residential heating solution. Its combination of advanced technologies, user-friendly features, and robust construction make it a leading option in the boiler market, ready to meet the demands of today’s homeowners. With an eye on energy efficiency and ease of use, Lochinvar 5 is well-equipped to provide comfortable, cost-effective heating for years to come.
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