Lochinvar 45,000 - 260,000 BTU/HR Low Water Cutoff if equipped, General Plumbing Rules

Page 24

Installation & Service Manual

4Water connections

Low Water Cutoff (if equipped)

A hot water boiler installed above radiation level must be provided with a low water cutoff device either as part of the unit or installed at the time the boiler is installed. An electronic low water cutoff is available as a kit on all units. Low water cutoffs should be inspected every six months, including flushing of float types.

TABLE - 4A

MINIMUM REQUIRED FLOW

FOR HEATING BOILER

 

Input Btu/hr

GPM Flow

 

 

 

 

 

 

 

 

45,000

 

1.9

 

 

 

 

 

 

 

 

75,000

 

3.1

 

 

 

 

 

 

 

 

90,000

 

3.7

 

 

 

 

 

 

 

 

135,000

 

5.6

 

 

 

 

 

 

 

 

180,000

 

7.4

 

 

 

 

 

 

 

 

215,000

 

8.9

 

 

 

 

 

 

 

 

260,000

 

10.7

 

 

 

 

 

 

 

 

 

 

Minimum flow is based on a 40°F

 

 

NOTICE

 

 

 

 

temperature rise across the boiler.

 

 

 

 

 

 

 

 

Minimum flow may not prove a flow

 

 

 

 

switch installed in the boiler piping. Use

 

 

 

 

care when operating a boiler at or near

 

 

 

 

the minimum recommended flow

 

 

 

 

because conditions unique to the

 

 

 

 

installation (system pressure, operation

 

 

 

 

of multiple zone valves, glycol,

 

 

 

 

variations in flow, etc.,) may result in

 

 

 

 

overheating of the boiler water causing

 

 

 

 

noise or nuisance operation of safety

 

 

 

 

limit controls. Typical heating boiler

 

 

 

 

applications will operate with a 20°F to

 

 

 

 

30°F temperature rise across the boiler.

 

Typical Heating Boiler Installations

General Plumbing Rules

1.Check all local codes.

2.For serviceability of the boiler, always install unions.

3.Always pipe pressure relief valves to an open drain.

4.Locate system air vents at the highest point of the system.

5.Expansion tank must be installed near the boiler and on the suction side of the pump.

6.Support all water piping.

Placing the Boiler in Operation

Filling the System: All air must be purged from the system for proper operation. An air scoop and air vent must be located close to the boiler outlet and there should be a minimum distance between the cold water feed and the system purge valve.

1.Close all drain cocks and air vents.

2.Open the makeup water valve and slowly fill the system.

3.If a makeup water pump is employed, adjust the pressure to provide a minimum of 12 psi at the highest point in the system. If a pressure regulator is also installed in the line, it should be adjusted to the same pressure.

4.Close all valves. Purge one circuit at a time as follows:

A.Open one circuit drain valve and let the water drain for at least five minutes. Ensure that there are no air bubbles visible in the water stream before closing the drain valve.

B.Repeat this procedure for each circuit.

5.Open all valves after all circuits have been purged. Make sure there are no system leaks.

NOTICE

Do not use petroleum based stop leak products. All system leaks must be repaired. The constant addition of make-up water can cause damage to the boiler heat exchanger due to scale accumulation. Scale reduces flow and heat transfer, causing overheating of the heat exchanger.

6.Run the system circulating pump for a minimum of 30 minutes with the boiler turned off.

7.Open all strainers in the system and check for debris.

8.Recheck all air vents as described in step 4, General Plumbing Rules.

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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 WallMasonry Chimney Installation Sidewall Venting Negative DraftVent Materials 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 Typical Heating Boiler Installations Low Water Cutoff if equippedMinimum Required Flow For Heating Boiler 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 Terminal Strip Wiring Boiler Operating Temperature ControlElectrical connections 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 LocationPre-start Checklist Start-upInitial Start-up Lighting Instructions for Spark Ignition Pilot ModelsSafety Shutoff Test for Spark Ignition Pilot System Operating InstructionsTo Turn Off Gas to Appliance Intermittent Pilot Spark Ignition System Freeze ProtectionWater Treatment Ignition and Control TimingsMaintenance Maintenance and annual startup Service technicianOwner maintenance See the User’s Information Manual for instructionsMaintenance Check Expansion Tank Check Relief ValveCheck All Wiring Check Control SettingsHeat Exchanger / Burner Access Perform Start-up and ChecksInspection and Cleaning Breathing Fresh airReview with owner Inspection of Heat Exchanger WaterwaysGas Train and Controls Water Circulating PumpTroubleshooting Troubleshooting Guide M9 Solution BoilersDiagrams Schematic Diagram M9 UnitWiring Diagram M9 Unit 45,000 260,000 Btu/hr Models 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.
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