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FURNACE
COMPONENTS
_17
_3
_4
:---18
_6
/5
,-15
--14
1-13
_7
19
"10
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.
12.
13.
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.
15. Light emitting
diode (LED) on furnace control board. Status
code light is for diagnosing
furnace
operation
and service
requirements.
16. Pressure
switches
ensure
adequate
flow of flue gas through
furnace
and out vent system.
17. Rollout
switch (manual
reset) to prevent
overtemperature.
18. Junction
box for 115-v
electrical
power
supply.
(May be
located
on right or left side)
19. Transformer
(24v) behind
furnace
control
board
provides
low-voltage
power to furnace control board and thermostat.
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