Lennox International Inc SL280UH090V36B, SL280UH090V48B, SL280UH070V36A SL280UHV NOX INSERTS

Models: SL280UH090V36B SL280UH070V36A DAVE LENNOX SIGNATURE COLLECTION GAS FURNACE UPFLOW / HORIZONTAL AIR DISCHARGE SL280UH090V48B

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SL280UHV NOX INSERTS

SL280UHV NOX INSERTS

FIGURE 40

Remove 5 screws if necessary

(either side of cabinet)

1

2

3

4

5

FIGURE 41

18− Reconnect all wires.

19− Reconnect top cap and vent pipe to combustion air in- ducer outlet.

20− Reconnect gas supply piping.

21− Turn on power and gas supply to unit.

22− Set thermostat and check for proper operation.

23− Check all piping connections, factory and field, for gas leaks. Use a leak detecting solution or other preferred means.

Manual background 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.

24− If a leak is detected, shut gas and electricity off and repair leak.

25− Repeat steps 24 and 26 until no leaks are detected.

26− Replace access panel.

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Lennox International Inc SL280UH090V36B, SL280UH090V48B, SL280UH070V36A installation instructions SL280UHV NOX INSERTS