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Honeywell L4068 Manual page 4

Fan controls and air switches
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MOUNTING
L4068A,C,E,F;
L6068
NOTE:
If the existing
element
mounting
is suitable,
proceed to step 7. If existing mounting
is unsuitable,
install the case as follows.
1. Make opening
in plenum.
See Figs. 2 and 3 for
dimensions.
If modifying
existing
opening
which is
too small, enlarge it. If existing
opening is too large,
use an asbestos
gasket to decrease hole size, or cover
opening with a piece of sheetmetal
and cut a new hole.
FIG. S-MOUNTING
DIMENSIONS
IN INCHES
[MIL-
LIMETRES
IN BRACKETS]
FOR L4068A,E
AND
L6068A
WITH
CASE
AND
COVER.
Page
4
FIG. 3-MOUNTING
DIMENSIONS
IN INCHES
LMIL-
LIMETRES
IN BRACKETS]
FOR L4068C.F
AND L6068D WITHOUT
CASE AND COVER.
2. Remove cover from case.
3. Position
case over plenum
opening
and
mark
mounting
holes.
4. Drill or punch holes for mounting
screws.
5. Remove knockouts
from case.
6. Using two
sheetmetal
screws
furnished,
fasten
case to plenum or furnace.
7. Insert element into plenum.
8. Fasten
control
securely to furnace or case using
backplate mounting
screw.
9. After
wiring
and
adjustments
are
complete,
replace cover.
NOTE:
Manual
fan lever on L4068E,F
has a break-
awav arm.
If cover to be used has no fan lever
opening,
snap off lever by bending
with fingers be-
fore placing cover on control.
L4068G LOCATION
AND MOUNTING
The L4068G is mounted
on any convenient
stud or
rafter in the attic. Mount the L4068G at the selected
location
using two screws through the mounting
holes at
the back of the case. Mount as shown in Fig. 4.
6748
FIG. 4-MOUNTING
THE
L4068G
IN THE
ATTIC.
WIRING
All wiring must agree with applicable electrical codes
and ordinances.
L4068A,C,E,F;
L6068
Follow any wiring instructions
furnished with heating
system. In a replacement
installation,
make certain the
L4068 or L6068 is wired in the system to operate the
same way as the old control.
NOTE: Two common
terminals
(with internal jumper)
are provided so that power may be provided to the
line voltage limit switch without
splicing.
Connect
the "hot"
wire from the power supply to the upper
left terminal.
On L4068, connect
the fan motor to
the bottom
terminal
(marked LOAD); connect
limit
switch, if wired in the line voltage circuit,
to the
upper right terminal.
Figs. 5-10 show typical wiring
diagrams.

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