EL280UH Two-Stage Gas Furnace Installation Manual - Lennox
EL280UH Two-Stage Gas Furnace Installation Manual - Lennox
EL280UH Two-Stage Gas Furnace Installation Manual - Lennox
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Vent Pipe<br />
HORIZONTAL LEFT POSITION<br />
Top Vent Discharge<br />
Pressure Switch<br />
Horizontal Position<br />
HORIZONTAL RIGHT POSITION<br />
Top Vent Discharge<br />
Vent Pipe<br />
Pressure Switch<br />
Flue Transition<br />
Flue<br />
Transition<br />
AIR<br />
AIR<br />
Cover Plate<br />
FLOW<br />
FLOW<br />
Collector Box<br />
Cover Plate<br />
<br />
<br />
Make−Up Box<br />
Collector Box<br />
Disconnect pressure switch hose from barbed fitting on the pressure<br />
switch assembly. Remove pressure switch assembly (1<br />
screw) and cut wire tie to free pressure switch wires. Re−install<br />
pressure switch on the other side of orifice plate and re−connect<br />
pressure switch hose.<br />
Re−secure pressure switch wires by either pulling excess wires<br />
through the blower compartment and securing with supplied wire<br />
tie or coil excess wire and secure to the gas manifold.<br />
FIGURE 19<br />
HORIZONTAL LEFT POSITION<br />
Side Vent Discharge<br />
<br />
<br />
<br />
<strong>Gas</strong> supply piping must be brought into the unit from the bottom<br />
in order to accommodate the flue pipe.<br />
Remove make−up box assembly (2 screws) and cut wire tie to<br />
free make−up box wires. Re−install make−up box on other side<br />
of cabinet.<br />
Re−secure make−up box wires by either pulling excess wires<br />
through the blower compartment and securing with supplied<br />
wire tie, or coil excess wire and secure to the gas manifold.<br />
FIGURE 21<br />
Make−Up Box<br />
Pressure Switch<br />
HORIZONTAL RIGHT POSITION<br />
Side Vent Discharge<br />
Pressure Switch<br />
AIR<br />
FLOW<br />
AIR<br />
Flue Transition<br />
FLOW<br />
Flue<br />
Transition<br />
Make−Up Box<br />
Collector Box<br />
<br />
<br />
Disconnect pressure switch hose from barbed fitting on the<br />
pressure switch assembly. Remove pressure switch assembly<br />
(1 screw) and cut wire tie to free pressure switch wires. Re−<br />
install pressure switch on the other side of orifice plate and re−<br />
connect pressure switch hose.<br />
Re−secure pressure switch wires by either pulling excess wires<br />
through the blower compartment and securing with supplied<br />
wire tie, or coil excess wire and secure to the gas manifold.<br />
FIGURE 20<br />
make up box<br />
FIGURE 22<br />
Collector Box<br />
Page 14
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