1704VRC3-AMEN, p 27/35
8.6
Combustion
air
control/switch
If
it
is
determined
that
the
air
differential
pressure
switch
needs
replacing,
use
only
authorized
replacements
that
are
designed
for
the
air
heater
being
serviced.
These
switches
are
calibrated
to
operate
at
the
designed
combustion
air
flow
duty
for
each
appliance
size
in
the
product
range.
8.7
Combustion
air
fan
(venter)
(
The
combustion
air
fan
motor
is
lubricated
for
life.
Do
not
oil
or
grease.)
1.
Ensure
gas
supply
to
the
air
heater
is
turned
OFF
2.
After
the
air
circulation
fan
has
stopped,
switch
OFF
the
electricity
supply
to
the
air
heater.
3.
To
gain
access
to
the
fan
open
the
hinged
controls
compartment
access
door.
refer
to
figure
9
for
location
4.
Mark
for
future
identification
and
disconnect
the
wires
connecting
the
fan
motor
at
the
terminals
on
the
main
wiring
junction.
5.
Remove
combustion
air
fan
and
clean
as
necessary
using
a
wire
brush
and
solvent
to
remove
sticky
residues.
6.
Re
‐
assemble
and
check
for
free
rotation
before
proceeding
to
test
the
appliance.
Note
:
The
combustion
air
fan
motor
is
lubricated
for
life.
Do
not
oil
or
grease.
Figure
9
:
View
of
control
compartment
Blower
Burner
Flame sensor
LC1 limit control
Venter motor
LC3 limit controls
Control
panel
Spark
igniter
ER
Gas valve V1
Fan control relay KFC
Burner
lamp H6
Reset
switch S3
Reset LC3
Fuse F3.1
Содержание VRC-3 100-3
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