Carlin CRD Series - SPECIFICATIONS - DIMENSIONS; Effect of Back Pressure on Maximum Firing Rates; Back Pressure Impact on Firing Rate; Firing Rate vs. Pressure Graph

GARUN
III
BURNERS
SPECIFICATIONS
—
DIMENSIONS
STANDARD
MODELS
—
7",
9",
and
1 1"
air
tube,
flange
or
ped¬
estal
mounting.
CAPACITIES
—
Model
200CRD,
2.00
to
5.00
GPH.
Model
20
1
CRD,
4.00
to
5.50
GPH.
(GPH
ratings
are
based
on sea
level
to
2,000
ft.
elevation.
For
every
1,000
ft.
rise
over
2,000
ft.,
reduce
the maximum
GPH
rating
by
4
percent.)
MOTOR
—
3450
RPM,
115-volt,
60-Hz,
l-phasc.
Va
H.P.
with
thermal
overload
protection.
48-frame
with
"N"
flange
per
NEMA
specifications.
TRANSFORMER—
120V/
10,000V.
23
milliampcrcs,
60
Hz.
Shielded
against
radio and
TV
interference.
UL
listed
for
continuous
duty;
interchangeable.
FUEL
UNIT
—
Standard
style
with
7/ic"
shaft
diameter.
3450
RPM.
Designed
for
quick
cut-off.
Single-stage
with
built-in
strainer
and
pressure
regulating
valve.
Strainer
and
nozzle
capacities
exceed
the
maximum
rating
of
the
burner.
Equipped
with
easy-flow
bleed
valve.
OIL
VALVE
—
Standard
burner
equipped
with
quick
opening
and
instantaneous
closing
magnetic
solenoid
valve
for
smooth,
clean
starts
and
sharp,
clean
cut-offs.
COMBUSTION
HEAD
and
ELECTRODE
ASSEMBLY
—
Unique
CRD
"controlled
flame
retention"
design
provides
adjustable
aerodynamics
so
that
air
pattern
and
velocities
can
be
op¬
timized
for
any
nozzle
size
within
the
entire
range
of
the
burner
without
a
change
of
parts.
High-chromium
stainless
steel
electrodes
with
porcelain
insulators
fully
glazed
and
counterbored
for
maximum
clean-
ability
and
safety.
Stainless
steel
heat
shield
on
air tube
pre¬
vents
overheating
of
combustion
head
and
nozzle.
NOZZLE
—
Stainless
steel
with
fine-mesh
strainer.
Spray
angle
and
spray
pattern
specified
for
optimum
combustion.
BLOWER
WHEEL
(FAN)
—
Precision
balanced. Mounted
directly
on
motor
shaft.
Dimensions:
Model
200CRD,
5Va"
OD
x
3Vi"
width.
Model
201
CRD,
5%"
OD
x
4"
width.
HOUSING
—
Rugged
grey
iron
casting
line-bored
for
accurate
alignment
of
motor
and
pump
shaft
centerlines.
Streamlined
fan-scroll
for
more
positive
and
quieter
air
delivery.
COUPLING
—
Flexible-type,
oil-resistant,
short
length
with
slip-
on
end
fittings
for
easy
service.
CONTROLS
—
Thermostat and
limit
control.
120-volt,
60-Hz
burner-mounted
primary
relay
with
cadmium
cell
flame
de¬
tector.
Complies
with
UL
requirements.
SHIPPING WEIGHT
—
Approximately
65
lbs.
DIMENSIONS
ARE
APPROXIMATE
MOUNTING
PLATE
TYPICAL
FLANGE
APPLICATIONS
EFFECT
OF
BACK
PRESSURE
ON
MAXIMUM
FIRING
RATES
The
maximum
firing
rates
of
5.00
gph
for
Model
200CRD
and
5.50
gph
for
Model
201CRD
are
based
on
operation
with
zero
to
slightly
negative
pressure
such
as
0.01"
to
0.03"
W.C.
draft
over
the
fire
as
normally
encountered
in
a
natural
draft
unit.
When
a
unit is
designed
for
forced draft
operation
with
a
positive
pressure
(back
pressure)
over
the
fire,
the
maximum
air
capacity
of
the
burner is reduced
in
proportion
to
the
amount
of
pressure.
As
a
result,
the maximum
firing
rate
is
also
reduced. The
graph,
right,
shows
the
maximum
firing
rate
in
gph
of
each
model
with
various
amounts
of
pressure
in
the
combustion
chamber.
As
an
example,
the
Model
200CRD
has
a
maximum
firing
rate
of
just
over
4
00
gph
when
fired
against
a
back
pressure
of
0.20"
W.C.
Note:
Installation
of
Models
200CRD
and
201CRD
in
trailers
or
furnaces
with
more
than
0.1"
back
pressure
or
with
undersized
breechlngs
(See
Table
A)
or
chimneys
(See
Table
B)
Is
not
recommended
unless
the
unit
has
been
pre-tested
with
these burners under
these
conditions.
x
0.
o
I
UJ
5
a:
o
z
£
u.
X
<
z
Table
A
Table
B
Max.
Firing
Rate
GPH
Min.
Diameter
Smoke
Pipe
(Ins.)
1.80
6
2.50
7
3.10
8
4.50
9
7.00
10
RECTANGULAR
ROUND
Max.
Firing
Rate
Chimney
Size
Liner
Size
Max.
Firing
Rate
Uner
Size
GPH
Nom.
(Ins.)
(Ins.)
GPH
(Ins.)
2.10
8x8
63/4
X
63/4
1.30
6
3.50
8x
12
6i/2
x
101/2
1.80
7
5.30
12
x
12
93/4
X
93/4
2.50
8
7.70
12x16
91/2
x
131/2
4.50
10
5.60
11
Add
5'
to
height
when
two
units
are
connected
to
one
chimney.
DRILL
S
TAP
3
HOLES
3/fl
-
16
FLANGE
UNIVERSAL
FLANGE
MOUNTING
PLATE
OPENING
REFRACTORY
OR
HIGH
TEMP
INSULATION
MODEL
ZOO
CRD
MODEL
0.0
0 20
0.40 0.60 0.80
LOO
1
ZO
PRESSURE
IN
COMBUSTION
CHAMBER
(INS
W
C
)