FURNACE COMPONENTS
1.
2.Burner sight glass for viewing burner flame.
3.Burner assembly (inside). Operates with
4.Redundant gas valve. Safe and efficient. Features 1 gas control with 2 internal shutoff valves. Valve appearance varies with furnace model.
5.Vent outlet. Uses PVC pipe to carry flue gas from the furnace’s combustion system (right or left side).
6.Inducer motor. Pulls hot flue gases through the heat exchangers, maintaining negative pressure for added safety.
7.Blower access panel safety interlock switch.
8.Air filter and retainer (location in furnace may vary).
9.Condensate drain connection. Collects moisture condensed from burned gases for disposal into home drain system. (Location in furnace varies.)
10.
11.Secondary condensing heat exchanger (inside). Wrings out more heat through condensation. Constructed with
12.Primary serpentine heat exchanger (inside). Stretches fuel dollars with the
13.Furnace control board.
14.
15.Light emitting diode (LED) on furnace control board. Status code light is for diagnosing furnace operation and service requirements.
16.Pressure switch(es) ensure adequate flow of flue gas through furnace and out vent system.
17.Rollout switch (manual reset) to prevent overtemperature.
18.Junction box for
19.Transformer (24v) behind furnace control board provides
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| A02264 |
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| Fig. 2 - Model 58UVB Furnace |
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| (Upflow Only) |
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