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ii
L4068G-70
to 110 F [21 to 43 C] adjustable
FAN
OFF setting.
L6068A-125
to 165 F [52 to 74 C] adjustable
temperature
setting.
L6068D-fixed
at 150, 165, or 200 F [66, 74, or
93 C] temperature
setting (200 F [93 C] model
less case and cover).
DIFFERENTIAL:
L4068A,C,E,F-20
to 50 F [ll
to 28 C] adjustable
differential,
or 35 F [ 20 C] fixed.
L4068G-12
F [ 7 C] nominal
fixed
differential.
L6068-20
F [44
C]
nominal
fixed
differential.
SENSING ELEMENT:
Flat blade bimetal on all models.
ELEMENT INSERTION LENGTH: 3 or 7 inches.
L4068A,C,E,F-3
or 7 inches.
L4068G-3
inches.
L6068A-3
or 7 inches.
L6068D-3
inches.
ADJUSTING
MEANS (L4068 only): Knobs on the face
of control
for models
with adjustable
FAN OFF
and fan differential
settings.
MOUNTING MEANS:
L4068A,C,E,F;
L6068
With case and cover-two
screw holes in back of
case.
Less case and cover-two
notches
for screws in
back of switch.
L4068G
Four screw holes in back of case.
MAXIMUM AMBIENT TEMPERATURE:
All models-
at switch 190 F, at bimetal350
F.
WIRING KNOCKOUTS:
L4068A,E;
L6068
with
case and cover only-one
in top and one in bottom
of case for l/2 inch
conduit.
L4068G-one
in top of case for l/2 inch conduit.
FINISH (models with cover only): Gray.
DIMENSIONS:
L4068F
2-314
l-718
2-318
L6068A
3-314
2-5116
2
L6068Da
3-314
2-5116
2
L6068D
2-314
I-718
I-311 6
awith case and cover.
CANADIAN
STANDARDS
ASSOCIATION
COMPO-
NENT
RECOGNIZED:
File
No.
LR1322,
Guide
No. 400-E-0.
OPTIONAL SPECIFICATIONS:
1. L4068A with Celsius scale-25
to 50 C FAN OFF
setting range, 10 to 25 C adjustable
differential.
2. L4068G with MAN-AUTO fan lever.
ACCESSORY:
Case and
cover
assembly,
Part
No.
132475E,
for L4068C,F.
Assembly
includes
case,
cover,
decal,
one self-tapping
screw for mounting
control
in case, and
two
sheetmetal
screws
for
mounting
case.
Installer
must
be
a
trained,
experienced
serviceman.
Disconnect
power
supply
before
connecting
wiring to prevent electrical shock or equipment
damage.
Do not exceed ambient temperature
limitations
in any application;
see SPECIFICATIONS.
Always
conduct
a thorough
checkout
when
installation
is complete.
L6068 LOCATION
Downflow
furnaces-Locate
the L6068 between the
filter(s)
and the heat exchanger
where air circulation
is not restricted
by baffles.
Element
must not touch
any internal part of furnace.
Two-speed
fan control-Locate
the L6068
in the
furnace
outlet
or plenum
where it will be exposed to
the most rapid temperature
change and where it will
be affected
as much as possible by changing
average
temperature
of outlet
air with minimum
dependence
on radiant
heat. Element
must not touch any internal
part of furnace.
On L4068A,C,E,F
and L6068
follow
instructions
furnished
by the furnace
or burner
manufacturer,
if
available.
Otherwise,
proceed
as follows.
On L4068G
follow instructions
given below.
LOCATION AND MOUNTING
L4068A,C,E,F
LOCATION
L-
Locate
the element
in the plenum
where it will be
exposed
to the
most
rapid temperature
changes.
It
should be affected
as much as possible by the temper-
ature of outlet air with minimum
dependence
on radiant
heat. Element
must not touch any internal
part of the
furnace.
ELEMENT
TOO FAR
FROM HEAT SOURCE
ELEMENT
IN AIR
FLOW AT AVERA
ELEMENT
IN
FIG.
I-LOCATION
OF SENSING
ELEMENT.
Page
3
60-2260
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