Electrical, Electrostatic Discharge ESD | Lennox International Inc

Leak Check

After gas piping is completed, carefully check all piping connections (factory− and field−installed) for gas leaks. Use a leak detecting solution or other preferred means.

NOTE − If emergency shutoff is necessary, shut off the main manual gas valve and disconnect the main power to the furnace. The installer should properly label these devices.

CAUTION

Some soaps used for leak detection are corrosive to certain metals. Carefully rinse piping thoroughly af- ter leak test has been completed. Do not use matches, candles, flame or other sources of ignition to check for gas leaks.

The furnace must be isolated by closing its individual manual shut-off valve and disconnecting from from the gas supply system the during any pressure testing of the gas supply system at pressures greater than 1/2 psig (3.48 kPa, 14 inches w.c.).

IMPORTANT

When testing pressure of gas lines, gas valve must be disconnected and isolated. See figure 28. Gas valves can be damaged if subjected to pressures greater than 1/2 psig (3.48 kPa, 14 inches w.c.).

	MANUAL MAIN	ISOLATE
	SHUT−OFF VALVE	ISOLATE
	SHUT−OFF VALVE	GAS VALVE
	WILL NOT HOLD	GAS VALVE
	WILL NOT HOLD	FURNACE
	NORMAL TEST	FURNACE
	NORMAL TEST
	PRESSURE
	1/8 NPT PLUG

CAP

FIGURE 28

Electrical

ELECTROSTATIC DISCHARGE (ESD)

Precautions and Procedures

CAUTION

Electrostatic discharge can affect elec- tronic components. Take precautions to neutralize electrostatic charge by touching your hand and tools to metal prior to handling the control.

The unit is equipped with a field make−up box on the left hand side of the cabinet. The make−up box may be moved to the right side of the furnace to facilitate installation. If the make−up box is moved to the right side, clip the wire ties that bundle the wires together. The excess wire must be pulled into the blower compartment. Secure the excess wire to the existing harness to protect it from damage.

INTERIOR MAKE−UP BOX INSTALLATION

Right Side

BOX

FIGURE 29

INTERIOR MAKE−UP BOX INSTALLATION

Left side

BOX

FIGURE 30

Refer to figure 31 for schematic wiring diagram and trou- bleshooting and table 10 and figure 32 for field wiring.

The power supply wiring must meet Class I restrictions. Protected by either a fuse or circuit breaker, select circuit protection and wire size according to unit nameplate.

NOTE − Unit nameplate states maximum current draw. Maximum over−current protection allowed is 15 AMP.

Holes are on both sides of the furnace cabinet to facilitate wiring.

Install a separate (properly sized) disconnect switch near the furnace so that power can be turned off for servicing.

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Elite Series Gas Furnace Upflow/Horizontal Air Discharge, EL280UH specifications

Lennox International Inc. has established itself as a leader in the heating and cooling industry, providing innovative solutions for both residential and commercial environments. One of their notable products is the EL280UH, a high-efficiency gas furnace designed to offer optimal comfort while minimizing energy consumption.

The EL280UH operates with an impressive Annual Fuel Utilization Efficiency (AFUE) rating of up to 80%. This efficiency rating means that 80% of the fuel consumed is converted into heat, making it a cost-effective option for homeowners looking to reduce their utility bills. The furnace’s design is tailored to deliver reliable warmth during the coldest months, ensuring a comfortable home environment.

A key feature of the EL280UH is its two-stage heating capability. This technology allows the furnace to operate at a lower heating output for less demanding conditions, which not only conserves energy but also helps maintain a more consistent temperature in the home. When the demand for heat increases, the furnace can seamlessly transition to its higher output setting, providing quick and effective heating when needed.

Additionally, the EL280UH is equipped with a durable cabinet that minimizes heat loss, enhancing overall performance. The design incorporates several sound-dampening features as well, which contributes to quieter operation, allowing homeowners to enjoy a serene indoor environment.

The furnace also includes an advanced control system that integrates easily with smart home technology. This feature enables users to monitor and adjust their heating settings from anywhere using a smartphone app, creating added convenience and control over home heating.

Safety is another paramount aspect of the EL280UH. It includes an integrated flame sensor and pressure switch, ensuring reliable operation while minimizing risks associated with furnace malfunctions. The design adheres to stringent safety standards, providing users with peace of mind.

In summary, the Lennox EL280UH furnace stands out for its high efficiency, advanced features, and commitment to user safety. Its two-stage heating capability, quiet operation, and smart home integration make it an excellent choice for homeowners looking to enhance their heating system while being energy-conscious. The EL280UH embodies Lennox's dedication to quality and innovation, ensuring that comfort and efficiency go hand in hand.