Lochinvar 45,000 - 260,000 BTU/HR Solution How it works, Temperature and pressure gauge

Page 6

The Solution - How it works...

1.Control panel cover

The control panel cover provides access to the thermostat, ignition module, and transformer.

Installation & Service Manual

16.Sight Glass

The sight glass provides a view of the burner surface, burner flame, and the pilot flame.

2.Burner (not shown)

The burner is a cylindrical stainless steel tube used to regulate burner flame.

3.Drain port

Location from which the heat exchanger can be drained.

4.Flue outlet

The flue outlet allows the connection of the vent pipe to the unit.

17.Temperature and pressure gauge

The temperature and pressure gauge monitors the outlet temperature of the appliance as well as the system water pressure.

18.Temperature sensor

This sensor monitors inlet water temperature. If selected as the controlling sensor, the appliance will maintain the setpoint at this sensor.

5.Gas connection

The gas pipe connection on this appliance is 1/2", or 3/4" NPT. To deliver the correct amount of gas volume to the appliance it may be necessary to have a larger gas line reduced at the appliance. Please reference the National Fuel Gas Code charts for more details.

6.Gas valve

The gas valve allows the proper amount of gas to pass into the burner for combustion.

7.Heat exchanger

The heat exchanger allows system water to flow through specially designed tubes for maximum heat transfer. The glass lined headers and copper finned tubing are encased in a jacket that contains the combustion process.

19.Terminal strip

The boiler is equipped with a terminal strip on the left side of the unit to allow easy connection to contact points.

20.Top panel

Removable panel to gain access to the internal components.

21.Thermostat

The thermostat monitors the water temperature via a temperature sensor and will initiate a call for heat when the water temperature drops below the setpoint plus the differential on the thermostat.

22.Transformer

The transformer reduces 120 VAC supply voltage to 24 VAC for the control circuit.

8.High limit sensor

Device that monitors the outlet water temperature to ensure safe operation. If the temperature exceeds its setting, it will break the control circuit, shutting the appliance down.

9.Ignition module

The ignition module responds to a call for heat signal to provide burner operation.

23.Water inlet (system return)

The water inlet is a 1 1/2" pipe connection that receives water from the system and delivers it to the heat exchanger.

24.Water outlet (system supply)

The water outlet is a 1 1/2" pipe connection that supplies water to the system with connections for a flow switch, a relief valve, and a temperature and pressure gauge.

10.Junction box

The junction box contains the connection points for the line voltage power and all pumps.

11.Performance loop

A pumped bypass provides constant flow through the heat exchanger when the building system flow is reduced.

12.Performance Loop Pump

The pump ensures adequate flow to operate the unit.

13.Pilot (not shown)

The pilot is a spark ignition device used to light a pilot flame which in turn is used to light the main burners.

14.Pump relay

The pump relay energizes the pump on a call for heat.

15.Relief valve

The relief valve is a safety device that ensures the maximum pressure of the appliance is not exceeded.

25.Gas manifold pipe

Delivers gas from the gas valve to the main burners through a number of orifices.

6

Page 5 Page 7
Image 6
Page 5 Page 7
Contents Models 45,000 260,000 Btu/hr Contents Warranty Please read before proceedingCodes Solution Boiler =B=R Rating RatingsSolution How it works Temperature and pressure gaugeSolution How it works Solution How it works Determine boiler location Location of unit3Combustion Air Direct from Outside 6Combustion Air from Outside Single Opening Minimum Recommended Combustion AIR Supply to Equipment Room Venting Conventional Negative Draft Venting SystemVent Pipe Sizes Venting Vertical Vent Termination Clearances Less from Ridge From Parapet WallVent Materials Masonry Chimney InstallationSidewall Venting Negative Draft Fan Assisted VentingAutomatic Vent Damper 7Vent Damper and Vent Damper Terminal BlockGas connections Gas Supply Gas Pressure TestGas Connection Install Piping to Control Gas PipingGas Manifold Pressure Adjustment Procedure 2WrenchChecking Gas Supply Pressure 4Gas Supply PressureCombination Gas Valves Venting of Combination Gas ValvesTwo Stage Burner Control System Water Flow Switch if equipped Water connectionsRelief Valve Minimum Required Flow For Heating Boiler Typical Heating Boiler InstallationsLow Water Cutoff if equipped General Plumbing RulesSystem Temperature Rise Chart Piping of the Boiler SystemHeat Exchanger Pressure Drop Chart Water ConnectionsCirculator Pump Requirements Circulator Pump Specifications Primary/Secondary Boiler PipingCirculator Pump Operation Low Temperature Bypass Requirements Full Flow ApplicationBoiler Flow Rates Primary / Secondary Piping Make UP WaterMake UP Water 6Multiple Boilers Zoned with Circulators Full System Flow From System8Single Boiler Full System Flow with Low Temperature Bypass Electrical connections Terminal Strip WiringBoiler Operating Temperature Control Auxiliary Device Connection to Terminal StripTemperature Adjustment AMP Draw DataMaximum SET Point Determination Maximum Set Point DeterminationOutdoor Air Temperature Sensor Wiring of Remote SensorsInstallation of Remote Sensors Outdoor Air Reset Option Additional Temperature ControlsBlocked Vent and Flame Roll-Out / Flame Interlock Switch 7Blocked Vent Switch LocationInitial Start-up Pre-start ChecklistStart-up Lighting Instructions for Spark Ignition Pilot ModelsSafety Shutoff Test for Spark Ignition Pilot System Operating InstructionsTo Turn Off Gas to Appliance Water Treatment Intermittent Pilot Spark Ignition SystemFreeze Protection Ignition and Control TimingsOwner maintenance Maintenance Maintenance and annual startupService technician See the User’s Information Manual for instructionsMaintenance Check Expansion Tank Check Relief ValveHeat Exchanger / Burner Access Check All WiringCheck Control Settings Perform Start-up and ChecksInspection and Cleaning Breathing Fresh airGas Train and Controls Review with ownerInspection of Heat Exchanger Waterways Water Circulating PumpTroubleshooting Troubleshooting Guide M9 Solution BoilersWiring Diagram M9 Unit 45,000 260,000 Btu/hr Models DiagramsSchematic Diagram M9 Unit 45,000 260,000 Btu/hr ModelsPage Revision a ECO #C03746 initial release SBR-I-S Rev a

45,000 - 260,000 BTU/HR specifications

Lochinvar, a leader in high-efficiency heating solutions, presents the Lochinvar line of boilers, specifically the Lochinvar 45,000 - 260,000 BTU/HR models. These boilers are designed to meet a wide range of heating demands, making them ideal for residential and commercial applications alike.

One of the key features of the Lochinvar boilers is their impressive efficiency rating. Utilizing advanced condensing technology, these units can achieve efficiencies of up to 96% AFUE (Annual Fuel Utilization Efficiency). This high efficiency not only reduces fuel consumption but also lowers utility bills, making it a cost-effective solution for heating needs.

The Lochinvar boilers are equipped with a powerful heat exchanger constructed from durable stainless steel. This design not only maximizes heat transfer but also enhances the longevity of the unit. By preventing corrosion and minimizing maintenance requirements, the stainless steel heat exchanger ensures that the boiler operates at peak performance for years.

Another significant aspect of the Lochinvar boilers is their modulating burner system. This technology allows the boiler to adjust its output based on demand, ensuring that it only uses the energy necessary to maintain the desired temperature. This feature not only improves efficiency but also contributes to a more comfortable indoor environment by minimizing temperature fluctuations.

The Lochinvar series also showcases a user-friendly control interface. The advanced LCD display allows for easy monitoring and adjustment of system settings. Connectivity options are often included, providing the ability to integrate with modern building management systems for enhanced control and diagnostics.

Safety features abound in the Lochinvar models, which include built-in safeguards such as temperature and pressure relief valves, flame detection systems, and modulation cut-off to protect against overheating and other hazardous conditions.

Moreover, these boilers are designed for easy installation and maintenance. Compact dimensions and lightweight design facilitate straightforward setup, even in tight spaces. Additionally, users can take advantage of the unit’s self-diagnostic capabilities to simplify troubleshooting and reduce downtime.

In conclusion, the Lochinvar 45,000 - 260,000 BTU/HR boilers represent a pinnacle of innovation in heating technology. With high efficiency, advanced control systems, durable components, and safety features, they stand out as reliable and effective solutions for a variety of heating applications, ensuring comfort and efficiency in any environment.
Top Page Image Contents