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Door Latch Mechanism
(
DKR 2
,
DKR 3
,
DKL 2
,
DKL 3
)
®
H . Turn
the
handle
1
/
4
turn
clockwise
(
looking from
inside the
enclosure door
)
and attach the
latch plate
roller
to
the han
-
dle shaft
,
while inserting the bent leg of the spring into the
hole
in
the
latch
plate
.
Fasten with a locking
-
type
flange
nut
.
Tighten
the
nut
,
then loosen
1
/
8
turn to
allow move -
ment
of the
roller assemblies
(
Figure 1
)
.
NOTE :
Straight
leg
of spring must rest against pin
(
12
)
on
handle
plate
.
See inset
on
Figure 1
.
I
.
Place
top
spring
(
13
)
over top
thin wall hex
nut
. Attach
lockout plate
(
14
) to
lockout screw using locking
type
flange
nut
.
Tighten
flange nut
.
Insert bent
leg of spring into
hole in lockout
plate as shown in Figure
1 detail
.
J .
Attach the
interlock
defeater lever
(
15
)
to
the
latch bar
(
16
)
with
two
#
10
lockwashers and
# 10
-
24 screws
.
NOTE :
The position of lever
depends on enclosure depth
(
Figure
3
)
.
K . Weld
or rivet
the
door catch
(
17
) to
the enclosure door
.
User
must
supply the mounting
hardware
.
L . Attach the door latch
label
to
the door
handle on
the
enclosure door .
Adjusting
the
Mechanism
If using
in conjunction with
the FHOPIN or
FHOHN 4
Flandle
Operator
,
perform the following
steps
:
A . With the door in the
open
(
unlatched
)
position
,
close the
door
,
but do
not turn
the door
handle . The lockout plate
should latch the door
partially
closed .
B . Turn
the
handle clockwise
to stop
. This
will engage
the
rollers against
the enclosure flange
,
securing
the door
fully
closed
.
C
.
Check that the circuit breaker can be
turned ON
. If the
breaker will
not turn ON
,
adjust the interlock defeater lever
downward
to
engage the
lever on the handle
operator
.
D . To
open the door
,
insert
a
screwdriver into the handle
screw and
turn
the
screw and
handle counterclockwise .
The door will only
open
partially if
the
operating handle is
in the ON position
.
If the door fully opens with the
handle
in the ON
position
,
adjust the interlock defeater
lever
upward and
repeat
Steps
C and D
.
NOTE : To
open
the
door when
the handle
is in the
ON
position
,
turn
the latch defeater screw located
on
the side
of the operating handle
.
Dimensions
(
In
Inches
)
A
DANGER
H
Hazardous Voltage .
Will cause death
or
severe injury
.
Turn power off supplying switchboard
or panel
before installing
.
A
Safety Instructions
General Information
These door latch mechanisms are for use in standard
or
cus
-
tom
built enclosures . The door latch
post
assemblies
and the
door
catch are
supplied
with the kits . Users
must
supply
their
own 1
/
4
"
x
1
/
2
" steel
latch bar . Enclosures with an overall
height
less than
40
"
require
the
two
-
point
door latch mecha
-
nism
.
When the overall height is
greater
than
40
"
,
the three
-
point
latch mechanism is used .
The door
latch
mechanism can
be
used
with or without
the
type
FHOHN
Flange Mount
Flandle
Operator
.
These instruc
-
tions apply when the door latch mechanism
is mounted
adja
-
cent to
and interlocks with the FHOHN Handle Operator . The
door handle can be padlocked
to prevent
unauthorized
entry
into
the enclosure . Drawings in these installation instructions
are oriented
for
right
-
hand
flange installation
.
Left
-
hand flange
installation
drawings are
mirror images
of
the right
-
hand ver
-
sions
. For left
- hand
flange installation
,
substitute
" clock
-
wise
"
for "
counterclockwise
"
and vice
versa
,
whenever those
words appear
.
Installation
of the
Door Latch
Mechanism
A
.
Drill
mounting holes
in the enclosure door
observing the
minimum dimensions shown
in Figure 2
.
See
FHOHN
Handle
Operator
instructions for
flange drilling
pattern
.
NOTE : D and E
dimensions are determined
by the
height
of the
enclosure
.
Refer
to
Figure
1
for the following
steps :
B
. Place
gasket
(
1
)
on
handle plate
(
2
)
and attach handle
plate to
enclosure door with
two
thin
wall hex
nuts
(
3
)
.
Tighten the
nuts to
100 in
-
ibs .
C
.
Insert lockout screw
(
4
)
and handle
(
5
)
through holes in
the handle
plate
.
D
. Install latch
bar
post
assembly
(
6
) (
screw , sealing washer ,
flat washer
,
and special hex
nut (
7
)
,
if
used .
)
E . Attach
top
(
8
)
,
bottom
(
9
)
and latch
plate
rollers
(
10
) to
latch bar
with
retaining pins and E
- rings
.
NOTE : Two
-
point latch
does
not have
bottom roller
.
F . Fasten the
top
and bottom rollers
to
the
enclosure
door
with
locking
type
flange
nuts
.
Tighten the
nuts ,
then loosen
them
1
/
8
turn to
allow
movement
of the
roller assemblies
.
G
.
Place bottom spring
(
11
)
over
the bottom
thin
wall hex
nut
inside the
enclosure door
.
c
Q
1.922
2.594
H
9.375
R
1.875
I
S
.
50
1.625
J
2.688
T
.
250
K
1.859
U
.
688
L
1.797
V
.
281
Dia
.
M
.
391 Dia
.
W
.
703 Dia .
N
2.297
X
2.484
P
.
719
Y
.
219 Dia
.
CD The last letter
and number
designate right
-
or left
-
hand
,
2 or 3
point
latches
.
40
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