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I-T-E Door Latch Mechanism (DKR2, DKR3, DKL2, DKL3)
General Information
These door latch mechanisms are for use in standard or
custom built enclosures. The door latch post assemblies and
the door catch are supplied with the kits. Users must supply
their own 1/4 in. x 1/2 in steel latch bar Enclosures with an
overall height less than 40 in. require the two-point door latch
mechanism. When the overall height is greater than 40 in., the
three-point latch mechanism is used.
The door latch mechanism can be used with or without the
type FHOH Flange Mount Handle Operator. These instruc-
tions apply when the door latch mechanism is mounted
adjacent to and interlocks with the FHOH Handle Operator.
The door handle can be padlocked to prevent unauthorized
entry into the enclosure. Drawings in these installation instruc-
tions are oriented for right-hand flange installation. Left-hand
flange installation drawings are mirror images of the right-
hand versions. For left-hand flange installation, substitute
"clockwise" 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 FHOH
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. Ib.
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
50
H. Turn the handle 1/4 turn clockwise (looking from inside
the enclosure door) and attach the latch plate roller to the
handle 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 l/8 turn to allow
movement 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 FHOH or FHOH4 Handle
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
Minimum Dimensions (In Inches)
C
1.922
H
9.375
I
.50 S
J
2 .688
K
1.859
L
1.797
M
.391 Dia.
N
2.297
P
.719
(
1) The last letter and number designate right- or left-hand, 2 or 3 point latches
Q
2.594
R
1 .875
1
.625
T
250
U
.688
V
281 Dia
W
703 Dia.
X
2.484
Y
.219 Dia.
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