COZY W255F and Manual de instrucciones de instalación y funcionamiento - Página 5
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USING
ADJACENT
STUD
SPACE
FOR ALL COMBUSTION
AIR
FROM
OUTSIDE
HOLES
CONNECTING
TO VENTILATED
ATTIC
CEILING
PLATE
AIR
GRILLE
FLOOR
PLATE
HOLES
CONNECTING
TO
VENTILATED
CRAWL
SPACE
BASED
ON 4,000 BTU OF TOTAL
INPUT
RATING
OF ALL GAS APPLIANCES,
THE
HEATER
ONLY REQUIRES
A MINIMUM
FREE AREA
OF:
SQUARE
HOLE
SQUARE
BTU
IN.
SIZE
IN.
25,000
6.25
1"
.785
35,000
8.75
1.5"
1.76
50,000
12.50
2"
3.14
VENTING
This appliance
must be properly
connected
to a venting
system.
Consult local ordinances
governing
venting.
Install only
UL listed type BW 4" oval gas vent. When the vent enters the
attic, a listed type B- 1 round flue pipe may be used.
See Figure
2, Page 7.
Vent pipe must connect to the wall furnace header plate
with a"B" vent base plate and terminate
with a cap at a point at
least
12 foot above
the bottom
of the wall furnace,
two feet
above
any obstacle
within
a 10 foot radius,
and at least 3 foot
above the roof.
Provisions
must be made for adequate
combustion
and
ventilation
air.
This appliance
is equipped
with a manual reset blocked
flue switch designed
to protect against a blocked
flue condition,
which would cause combustion
products
to spill back into the
living quarters.
NOTE:
A partially
blocked,
inadequate,
or
disconnected
vent
system
may
not
activate
the
switch.
Discoloration
of the grille is an indication
of a bad vent. If this
occurs, the vent can be checked
by a qualified
serviceman
using
a draft gauge. After 15 minutes
the gauge should read between
-.02 up to -.04 inches
w.c.
Vent must
be checked
at the
beginning
of each heating season.
The switch when activated on a bulb control burner will
extinguish
the pilot flame, on a thermostat
controlled
burner, the
thermostat
circuit will be broken,
turning
offthe
main burner
flame.
Before
the heater can be relit, the reset button must be
activated.
See Figure B for location of the manual reset blocked
flue switch.
To reset the switch,
insert a slender
rigid object
(i.e. screwdriver)
through
the front panel louvers
and push the
reset button down.
See Figure
B-1. However,
you may have
to remove the front panel, then reset the switch and reinstall the
front panel
to relight
heater.
If homeowner
experiences
this
problem,
the vent
system
must
be checked
and corrected.
NOTE:
A pre-existing
vent that has worked
for years may not
be adequate
for todays
design
because
of higher
efficiency
requirements
that result
in lower
stack
temperatures.
See
"Possible
Causes
and Corrective
Action"
on Page 16.
All type "B" vents shall extend in a generally
vertical
direction
with offsets not exceeding
45 degrees,
except
that a
vent system having not more than one 60 degree offset may be
allowed.
Any angle greater than 45 degrees
from the vertical
is
considered
horizontal.
The total horizontal
run of a vent plus
the horizontal
vent connector
shall be not greater than 75 percent
of the vertical height of the vent.
Any offsets used should be as far above the
drafthood
as possible
to allow a venting
action to begin
before any restriction
is encountered.
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