Lochinvar 151 operation manual Operating information, General

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11 Operating information

General

How the water heater operates

The Armor water heater uses an advanced stainless steel heat exchanger and electronic control module that allows fully condensing operation. The blower pulls in air and pushes flue products out of the water heater through the heat exchanger and flue piping. The control module regulates blower speed to control the water heater firing rate. The gas valve senses the amount of air flowing into the water heater and allows only the right amount of gas to flow.

Control inputs and outputs

Tank thermostat / tank sensor

Either of these inputs will tell the water heater to provide heat to the water tank. If a tank sensor is connected, the SMART SYSTEM control will ignore the tank thermostat.

0 - 10VDC input (set point or power)

The Armor water heater can be controlled by a Building Management System (BMS) using a 0 - 10 VDC signal. The control can be configured by the installer to use this signal to either control set point or firing rate. This signal can be sent to the heater through ModBus as well.

Temperature control

Modulation

The Armor water heater is capable of modulating its firing rate from a minimum of 20% to a maximum of 100%. The firing rate is dictated by the hot water draw and various other temperature limitations.

Night setback

The controller may be programmed to reduce the DHW set point during certain times each week. Seven different start and stop times may be programmed for the DHW setback.

Flame current support

To prevent nuisance shutdowns when the water heater is firing at minimum rates, the control will increase fan speed when the flame signal drops too low.

Installation & Operation Manual

Protection features

Outlet temperature, flue temperature, and temperature rise limiting

The outlet temperature is monitored by the water heater outlet temperature sensor. When the outlet temperature exceeds 185°F, the unit will reduce the fan speed. If the outlet water temperature exceeds 195°F the control will shut the unit down until it cools off.

The control module monitors the flue temperature by a sensor located in the flue exhaust. If the flue temperature exceeds 215°F the control will reduce the maximum fan speed. If the flue temperature exceeds 240°F the control will shut the unit down. The unit will restart automatically once the flue temperature drops 25°F and the minimum off time has expired.

The control monitors the temperature difference between the inlet and the outlet sensor. On Models 151 - 501 if this difference is between 25 - 30°F the control will reduce the fan speed. If the temperature difference exceeds 30°F the control will shut the unit down.

On Models 601 - 801 if the temperature difference is between 30 - 35°F the control will reduce the maximum fan speed. If the temperature difference exceeds 35°F the control will shut the unit down.

The unit will restart automatically once the temperature difference has dropped below 25°F (Models 151 - 501) or 30°F (Models 601 - 801) and the minimum off time has expired.

Freeze protection

DO NOT install the water heater in a room likely to freeze.

The following integral feature of the SMART SYSTEM control module provides some protection for the water heater.

•The SMART SYSTEM control module provides freeze-up protection as follows when the water heater water temperature drops below 45°F:

•Below 45°F, the water heater pump operates constantly.

•Below 37°F, the water heater turns on.

•The water heater and pump will turn off if water heater water temperature rises above 45°F.

￿ CAUTION This feature of the SMART SYSTEM control module does not eliminate the possibility

of freezing. The installation must still use recognized design, installation and maintenance practice to prevent freeze potential for the water heater.

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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 RatingsBefore locating the water heater, check Installation must comply withCloset and alcove installations Determine water heater location1Closet Installation Minimum Required Clearances Flooring and foundation Residential garage installationProvide air openings to room Vent and air pipingAreas likely to have contaminants Products to avoidDetermine water heater location Models 151 Prepare water heaterGas conversions Remove water heater from wood palletModel 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 VentPVC/CPVC Vent piping materials Install vent and combustion air pipingRequirements for installation in Canada Installing vent or air pipingVent Pipe, and Fittings PVC/CPVC Air intake/vent connectionsStainless steel vent Air inlet pipe materialsModel Kit Number Stainlesssteelairintake/ventconnectionsFlue Flue Intake Air Adapter TerminationVent and air system Removing from existing ventModel Air Intake Vent Air contamination Optional room airVent, air piping and termination Model Kit Number DescriptionDetermine location If using the alternate sidewall terminationSidewall direct venting Vent/air termination sidewall3AClearance to Gravity Air Inlets Seal all wall cavities Prepare wall penetrationsTermination and fittings Prepare wall penetrations Alternate Field Supplied OptionMultiple vent/air terminations Description and usage Sidewall termination installationSidewall termination optional concentric vent Models 151 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 chaseSystem water piping methods Flow switch and relief valve installationFlow switch adjustment System pipingWater chemistry ScaldingPiping components 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 gasLength of Pipe in Straight Feet for 1/2 PSI Single Unit Natural Gas Pipe Capacity ChartCheck inlet gas supply Gas pressure Gas valve replacementLow voltage connections Field wiringInstallation must comply with Line voltage connectionsFlow switch Tank thermostat Low gas pressure switchLouver proving switch High gas pressure switchRuntime contacts Alarm contactsWiring of the cascade 3Low Voltage Field Wiring Connections Condensate drain Condensate disposalInspect/check condensate lines and fittings Start-upCheck for gas leaks Inspect/fill condensate system Chlorine concentration less than 200 ppmCheck system and water heater Final checks before starting the water heaterStart the water heater If water heater does not start correctlyFor Your Safety Read Before Operating 3Operating Instructions Models 400 Natural Gas Propane Set tank set point temperatureVerify WHR circulator mode Set water heater operationSet clock Configuration of the cascadeGeneral Operating informationWater heater temperature regulation User InstallerCascade Sequence of the cascadeOperation Display Sequence of operation1Control Panel Armor water heater control moduleWater heater Information Dial Function Owner maintenance Maintenance Maintenance and annual startupService technician Maintenance Check water system Check ignition ground wiringCheck all water heater wiring Check control settingsCheck burner flame Check flame signalCleaning heat exchanger Perform start-up and checksModel Kit Part Component Number Description Check Delta TOiled bearing circulators 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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