Troubleshooting, Check control module fuses

Copper-fin II/IIE Boiler and Water Heater Service Manual

3 Troubleshooting

WARNING

Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Always disconnect power to the appliance before servicing. Failure to comply could result in severe personal injury, death, or substantial property damage.

Check control module fuses

	NOTICE	ALWAYS check control module fuses before
	NOTICE	replacing control module or any major
		replacing control module or any major
		components (blower, etc.). If one of these
		fuses is blown, it can prevent the control
		module or other components from operating.

Never jumper (bypass) any device except WARNING for momentary testing as outlined in the

Troubleshooting chart. Severe personal injury, death, or substantial property damage can result.

Before troubleshooting:

1.	Have the following items:
	a.	Voltmeter that can check 120 VAC, 24 VAC, and
		12 VDC.
	b.	Continuity checker.
	c.	Contact thermometer.
2.	Check for 120 VAC (minimum 102 VAC to maximum

1.Turn OFF the power to the appliance at the external line switch.

2.Remove front access cover.

3.Inspect fuses F2, F4, F5, and F6, see FIG. 3-1 below.

Figure 3-1_Control Module Fuses

5 AMPS

	132 VAC) to appliance.
3.	Make sure thermostat is calling for heat and contacts
	(including appropriate zone controls) are closed. Check for
	24 VAC between thermostat wire nuts and ground.
4.	Make sure all external limit controls are installed and
	operating.

Check the following:

5 AMPS

3.15 AMPS

5 AMPS

1.Wire connectors to control module are securely plugged in at the module and originating control.

2.Gas pressures:

Refer to the Gas Connections Section of the Installation and Operation Manual for detailed information concerning the gas supply.

4.The appliance is shipped with four (4) spare fuses in a plastic bag attached to the control panel.

5.If necessary, replace open fuse (F2 is 3.15 amps and F4, F5, and F6 are 5 amps).

Note: Fuses F2 - F6 are all slow blow fuses.

WARNING

Do not jumper fuse or replace with any fuse except as specified. Failure to comply could result in severe personal injury, death, or substantial property damage.

6.Install front access cover after fuse inspection.

7.Restore power to the appliance at the external line switch and verify boiler/water heater operation (Start-up Section in the Installation and Operation Manual) after completing boiler/water heater service.

402, 2072 specifications

Lochinvar 2072,502 is an innovative and robust water-heating solution tailored for residential and commercial applications. This model represents a significant advancement in energy efficiency and performance, catering to the dynamic heating requirements of modern buildings.

One of the standout features of Lochinvar 2072,502 is its advanced thermal efficiency. With an impressive AFUE (Annual Fuel Utilization Efficiency) rating, the unit delivers exceptional heat output while minimizing energy consumption. This not only reduces utility bills for homeowners and businesses but also supports sustainability efforts by decreasing carbon footprints.

The Lochinvar 2072,502 incorporates cutting-edge technologies that set it apart in the market. It is equipped with advanced control systems that allow users to precisely manage heating outputs, ensuring optimal comfort while conserving energy. The user-friendly digital display provides real-time data, allowing for efficient monitoring and control.

Another significant characteristic of the Lochinvar 2072,502 is its robust stainless-steel construction. This feature enhances the unit's durability and longevity, ensuring reliable performance even in challenging conditions. The high-quality materials also contribute to maintaining consistent water temperatures, which is essential for both residential and commercial heating needs.

The Lochinvar 2072,502 operates silently, making it ideal for installations in areas where noise is a concern. Its compact design allows for flexible installation options, fitting seamlessly into various spaces, whether it’s a utility room, basement, or outdoor area.

Furthermore, the unit supports multiple venting options, accommodating different building architectures and layouts. This versatility makes it an ideal choice for new builds and retrofitting existing systems.

Maintenance is streamlined with the Lochinvar 2072,502, as it features a self-diagnostics system that simplifies troubleshooting. Regular service check-ups are made easier with accessible components, allowing technicians to perform maintenance tasks efficiently.

In summary, the Lochinvar 2072,502 stands out for its high efficiency, advanced technology, durability, and flexible installation options. It is an ideal choice for those seeking a reliable and technologically advanced water-heating solution that meets the challenges of contemporary heating demands while promoting energy savings and environmental responsibility.