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FURNACE COMPONENTS
Fig. 2 - Model 58MVC Furnace
A07609
1. Combustion-air intake connection to ensure contaminant-
free air (right or left side).
2. Burner sight glass for viewing burner flame.
3. Burner assembly (inside). Operates with energy-saving
inshot burners and hot surface igniter for safe, dependable
heating.
4. Redundant gas valve. Safe and efficient. Features 1 gas
control with 2 internal shutoff valves and one throttling
valve.
11.
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14.
Everlastic '_ Secondary condensing heat exchanger (inside).
Wrings out more heat through condensation. Constructed
with polypropylene-laminated steel to ensure durability.
Primary serpentine heat exchanger (inside). Stretches fuel
dollars with the S-shaped heat-flow design. Solid
construction of corrosion-resistant aluminized steel means
reliability.
Furnace control board.
3-amp fuse provides electrical and component protection.
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. Heavy-duty blower. Circulates air across the heat
exchangers to transfer heat into the home.
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19.
Light emitting diode (LED) on furnace control board. Status
code light is for diagnosing furnace operation and service
requirements.
Pressure switches ensure adequate flow of flue gas through
furnace and out vent system.
Rollout switch (manual reset) to prevent overtemperature.
Junction box for 115-v electrical power supply. (May be
located on right or left side)
Transformer (24v) behind furnace control board provides
low-voltage power to furnace control board and thermostat.