3
12
6
16
15
17
8
10
6
5
1
13
14
2
4
3
7
9
11
18
19
A02287
NOTES
:
1. The 58UVB Furnace is built for use with natural gas. The furnace can be converted for propane gas with a factory---authorized and listed accessory conver-
sion kit.
2. Control location and actual controls may be different than shown above.
1. Burner sight glass for viewing burner flame.
2. Burner assembly (inside). Operates with energy saving,
inshot burners and hot surface igniter for safe, dependable
heating.
3. Combustion--air intake connection to ensure contaminate--
free air (right or left side).
4. Redundant 2--stage gas valve. Safe, efficient. Features one
gas control with two internal shutoff valves.
5. Junction box for 115--v electrical power supply.
6. Vent outlet. Uses PVC pipe to carry vent gases from the
furnaces’s combustion system (right or left side).
7. Secondary condensing heat exchanger (inside). Wrings
out more heat through condensation. Constructed with
patented
polypropylene--laminated
steel
to
ensure
durability.
8. Pressure switches ensure adequate flow of flue products
through furnace and out vent system.
9. Inducer motor. Pulls hot flue gases through the heat
exchangers, maintaining negative pressure for added
safety.
10. Condensate
drain
connection.
Collects
moisture
condensed during combustion process.
11. Heavy--duty blower. Circulates air across the heat
exchangers to transfer heat into the home.
12. Air filter and retainer. May be used for side return
application.
13. Rollout switch (manual reset) to prevent overtemperature.
14. Primary serpentine heat exchanger (inside). Stretches fuel
dollars with the S--shaped heat flow design. Solid
construction of corrosion--resistant aluminized steel means
reliability.
15. Three--amp fuse provides electrical and component
protection.
16. Light emitting diodes (LEDs) on control center. Code
lights are for diagnosing furnace operation and service
requirements.
17. Comfort Heat Control center.
18. Blower access panel safety interlock switch.
19. Transformer (24v) behind control center provides low--
voltage power to furnace control center and thermostat.
58U
VB
