Checking Gas Supply Pressure

Installation & Service Manual

3Gas connections (continued)

GAS SUPPLY PRESSURE

MANOMETER

GAS VALVE

Figure 3-4_Gas Supply Pressure

1.	Turn the power “OFF” at the main disconnect
	switch.
2.	Turn gas valve control knob to the “OFF” position.
3.	Shut off gas supply at the manual valve in the gas piping
	to the appliance. If fuel supply is L.P. gas, shut off gas
	supply at the tank.
4.	Remove the 1/8" hex plug, located on the “inlet” side of
	the gas valve and install a fitting suitable to connect to a
	manometer or magnahelic gauge. Range of scale should
	be 14" w.c. or greater to check inlet pressure. See
	FIG.’s 3-3 and 3-4 for location.

8.Set the thermostat(s) to call for heat.

9.Observe the gas supply pressure with all burners firing. Ensure inlet pressure is within specified range. Check gas supply pressure with all other gas fired appliances in operation to ensure proper gas volume during periods of peak gas usage.

10.If gas pressure is out of range, contact gas utility, gas supplier, qualified installer or service agency to determine necessary steps to provide proper gas pressure to the control.

11.If the gas supply pressure is within the specified range, proceed with the following steps to return the appliance to service.

12.Turn the power “OFF” at the main disconnect switch.

13.Turn gas valve control knob to “OFF” position.

14.Shut off gas supply at the manual valve in the gas piping to the appliance. If fuel supply is L.P. Gas, shut off gas supply at the tank.

15.Remove the manometer and related fittings from the “inlet” side of the gas valve, replace 1/8" hex plug in gas valve.

16.Turn on gas supply at the manual valve, turn on L.P. Gas at tank if required.

17.Turn the power “ON” at the main disconnect switch.

18.Turn the gas valve control knob to the “ON” position. Spark ignition models will automatically light the pilot on a call for heat.

19.Set the thermostat to call for heat. The appliance is now ready to operate.

5.	Turn on gas supply at the manual valve, turn on L.P. gas
	at tank if required.
6.	Turn the power “ON” at the main disconnect switch.
7.	Follow the “Lighting Instructions” in Section 6 - Startup
	to light the pilot . Turn gas valve control knob to the
	“ON” position.

IMPORTANT

Upon completion of any testing on the gas system, leak test all gas connections with a soap solution while main burners are operating. Immediately repair any leak found in the gas train or related components. Do Not operate an appliance with a leak in the gas train, valves or related piping.

Check burner performance by cycling the system while you observe burner response. Burners should ignite promptly. Flame pattern should be stable, see the “Maintenance Section - Normal Flame Pattern”. Turn system off and allow burners to cool, then cycle burners again to ensure proper ignition and flame characteristics.

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.

Lochinvar 45,000 - 260,000 BTU/HR Checking Gas Supply Pressure, 4Gas Supply Pressure

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

3Gas connections (continued)