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Lochinvar 45,000 - 260,000 BTU/HR Gas connections, Gas Supply Gas Pressure Test, Gas Connection

Models: 45,000 - 260,000 BTU/HR

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Installation & Service Manual

3Gas connections

Gas Supply

Gas Pressure Test

Verify that the appliance is supplied with the type gas specified on the rating plate. This appliance is orificed for operation up to 2000 feet altitude. The appliance will be derated 4% per 1000 feet above 2000 feet elevation. Consult the factory for installations above 2000 feet elevation. Field conversions for operation at high altitude must be performed by certified personnel only. The appliance will be marked to indicate suitability for high altitude operation.

GAS SUPPLY PRESSURE: Measured at the inlet pressure tap located upstream of the combination gas valve(s) see FIG. 3-5, page 22.

TABLE - 3A

GAS SUPPLY PRESSURE

 

Natural Gas

LP Gas

Max. (Inches Water Column)

 

 

14

14

 

 

 

Min. (Inches Water Column)

4.5

11

 

 

 

Maximum inlet gas pressure must not exceed the value specified. Minimum value listed is for the purposes of input adjustment.

MANIFOLD PRESSURE: Measured at the pressure tap on the downstream side of the combination gas valve(s) (see FIG. 3-5, page 22). The gas regulator settings for single stage and two stage operation are factory set to supply proper manifold pressure for normal operation. To check manifold pressure, see Manifold Adjustment Procedure. Do not increase manifold pressure beyond specified pressure settings shown below in Table 3B.

 

TABLE - 3B

 

 

MANIFOLD PRESSURE

 

 

 

 

 

 

 

Single and

Two Stage

 

Two-Stage

 

 

 

Input Gas

 

 

 

 

Full or High Fire

Low Fire Settings

Btu/hr

Settings

 

 

 

Natural

LP Gas

Natural

LP Gas

 

Gas

 

Gas

 

45,000

3.5"

10"

0.9"

2.5"

 

 

 

 

 

75,000

2.4"

7"

0.9"

2.5"

 

 

 

 

 

90,000 - 180,000

3.5"

10"

0.9"

2.5"

 

 

 

 

 

215,000 - 260,000

3.5"

10"

0.9"

2.5"

 

 

 

 

 

18

1.The appliance must be disconnected from the gas supply piping system during any pressure testing of that system at a test pressure in excess of 1/2 PSIG (3.5kPa).

2.The appliance must be isolated from the gas supply piping system by closing a manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 PSIG (3.5kPa).

3.The appliance and its gas connection must be leak-tested before placing it in operation.

Gas Connection

1.Safe operation of the appliance requires properly sized gas supply piping. See data in Table 3C.

2.Gas pipe size may be larger than appliance gas connection.

3.Installation of a union is suggested for ease of service, see FIG. 3-1 on page 19.

4.Install a manual main gas shutoff valve, outside of the appliance gas connection and before the gas valve or manifold connection, when local codes require.

5.A trap (drip leg) MUST be provided by the installer in the inlet of the gas connection to the appliance, see FIG. 3-1 on page 19.

6.The combination gas valve has an integral vent limiting device and does not require venting to atmosphere, outside the building.

7.Optional gas controls may require routing of bleeds and vents to the atmosphere, outside the building when required by local codes.

TABLE - 3C

FITTINGS TO EQUIVALENT STRAIGHT PIPE

Diameter Pipe (inches)

3/4

1

1 1/4

1 1/2

2

3

4

5

 

 

 

 

 

 

 

 

 

Equivalent Length of Straight Pipe (feet)

 

 

 

 

 

 

 

 

 

2

2

3

4

5

10

14

20

 

 

 

 

 

 

 

 

TABLE - 3D

GAS CONNECTIONS

Btu/hr

Pipe Size

INPUT

 

 

 

45,000 - 135,000

1/2"

 

 

180,000 - 260,000

3/4"

 

 

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Lochinvar 45,000 - 260,000 BTU/HR service manual Gas connections, Gas Supply Gas Pressure Test, Gas Connection
Page 17 Page 19

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.