Remove the burner access door. See Figure

3.Reviewing that the return air duct connection(s) is physically sound, is sealed to the furnace casing.

4.The physical support of the furnace is sound without sagging, cracks, gaps, etc. around the unit so as to provide a seal between the unit and the structure.

5.Inspect for any obvious signs of deterioration of the furnace.

6.Periodic examinations of the vent terminal should also be conducted by the owner on a regular basis, preferably every monthly but at least every two months during the heating season.

7.Check the entire vent terminal for any blockage. If any debris is present remove it.

6.G THE FOLLOWING PROCEDURE SHOULD

BE FOLLOWED FOR THE PERIODIC INSPECTION AS CONDUCTED BY THE OWNER/OCCUPANT.

1.Set the wall thermostat to the OFF position or lower the set point lever to a temperature will below the existing room temperature. Shut off electric power to the furnace. A switch should be mounted either on the outside of the furnace or adjacent to the furnace for this purpose.

2.Remove the burner access door. See Figure 4.

3.Use flashlight or trouble light to observe the burner compartment and burners. There should be very minimal scaling or sooting in this area. Some loose debris may have fallen down on to the floor of the heat exchanger form the tube passageways, and this may be vacuumed out. Also observe the sides of the heat exchanger tubes for “hot spots” due to improper burner alignment or overfiring and give particular attention to any area where it looks like there may be any deterioration from corrosion or rusting. Observe for any corrosion on the burners themselves. Should anything appear questionable, contact your service agency.

4.Inspect the vent terminal, observing for any debris from weather, birds, and the like. Clean if necessary. Also check the small cover assembly on Induced Draft Blower Door to make sure it is clear. See Figure 4.

WARNING

Leakage of products of combustion into the living area may result in asphyxiation resulting in injury or death

5.Restore the electrical power to the furnace by turning the switch back on. Adjust the thermostat to call for heating operation.

6.Observe both the pilot flame and main burners flames, and compare to Figures 5 and 6 respectively. The main burners should be mostly “blue” with possibly a little orange (not yellow) at the tips of the flames. The flames should be in the center of the heat exchanger compartments and impinging on the heat exchanger surfaces.

7.Observe the flames until the blower starts (there is a normal delay 60 second period until the heat exchanger warms up). There should be no change in the size or shape of the flame. If there is any wavering or blowing of the flame on the blower start-up, it is an indication of a possible leak in the heat exchanger. Turn off the gas valve in the gas line leading to the furnace, and then the main electrical switch to the furnace and call your service agency.

8.Replace the burner access door.

Manual 2100-279 Page 8

43506 specifications

The 3Com 43506, also known as the 3Com SuperStack 3 Switch 4400, is a robust networking solution designed for small to medium-sized enterprises that require a reliable and efficient way to manage their network traffic. This managed switch offers a variety of features and technologies that cater to both performance and flexibility, making it a popular choice in the industry.

One of the standout features of the 3Com 43506 is its ability to support Layer 2 and Layer 3 switching. This means that it can efficiently manage data packets at both the data link and network layers, ensuring optimal traffic management and routing. This versatility is essential for organizations that need to segment their networks and control the flow of information between different departments or units.

The 3Com 43506 utilizes advanced switching technology that includes high-speed Ethernet connections, specifically 10/100/1000 Mbps rates on all ports. This enables the switch to handle large volumes of traffic without bottlenecks, making it ideal for bandwidth-heavy applications such as video conferencing or large file transfers. With its multiple Gigabit Ethernet ports, users can also connect high-performance servers and storage devices directly to the switch, enhancing overall network speed and reliability.

Quality of Service (QoS) is another significant feature of the 3Com 43506. This technology allows network administrators to prioritize certain types of data, ensuring that critical applications receive the bandwidth they need for optimal performance. For organizations that rely on voice-over-IP (VoIP) or real-time video services, QoS is invaluable for maintaining clear audio and video quality.

In terms of management, the 3Com 43506 offers comprehensive support for Simple Network Management Protocol (SNMP) and web-based management interfaces, providing network administrators with the tools to effectively monitor and configure the switch. The device also supports virtual LANs (VLANs), which enhance network security and efficiency by allowing the segmentation of network traffic.

Moreover, the 3Com 43506 is designed with reliability in mind. It features dual power supply support for redundancy, ensuring continued operation even in the event of a power failure. Its fanless design contributes to quiet operation, making it suitable for deployment in office environments where noise levels must be kept to a minimum.

Overall, the 3Com 43506 is a versatile and feature-rich switch that meets the demands of modern networking environments. Its combination of performance, advanced management features, and reliability makes it an excellent choice for businesses looking to enhance their network capabilities.