Closer Valve Adjustment; Optional Hold Open Arms - LCN 1450 Series Installation Instructions Manual

Check closing time, and adjust closer if needed.
opening the regulation valves (described below) too
far may result in the closer leaking oil! This may result
in closer and property damage, and personal injury.
FoLLoW ALL inSTRuCTionS CAREFuLLY.
Valve must be closed CW to seat, never more than 3 turns CCW
L
from seated position. Adjust the valves in 1/4 turn increments or
less at a time. Do noT TuRn MoRE THAn 3 FuLL RoTATionS.
THiS WiLL CAuSE THE CLoSER To LEAK oiL!
Do noT ADJuST THE LATCH SPEED iF THE DooR DoES noT
L
LATCH. if this occurs, adjust the spring force.
1. Open the door to 90°, measure how long the door takes to
close and latch. A typical closing time is 5 to 7 seconds, evenly
divided between main speed and latch speed.
2. If the closing time needs to be adjusted, use the closer valves
described below.
a. Backcheck (BC)- this controls door speed opening as the
door angle approaches 90°. Do not use as a door stop.
b. Main Speed (M)- this controls door speed during most of
the closing motion.
1 See the image below to determine the direction of the
Hold Open nut. This is determined by the door handing.
Pull Mount
RH
Top Jamb Mount
LH
P.A. Mount
LH
Screw Type
Wood (for wood doors & frames)
Machine (for metal doors & frames)
Requires hole drilling & tapping; best hold.
SRT - Self Reaming & Tapping (for metal doors
& frames)
Screw Type
Fifth Hole Spacer
Thru Bolts
Pinion Attachment Screw

Closer Valve Adjustment

CAuTion

Optional Hold Open Arms

LH
180° Mounting Hold
Open (120°-180°)
RH
120° Mounting Hold
Open (95°-120°)
100° Mounting Hold
Open (85°-100°)
RH
c. Latch Speed (L)- this controls door speed during the last
few degrees of door closing.
d. DA Speed (D)- this controls the delay speed for DA cylinders.
This valve is present on DA cylinders only.
3. Turn the valves clockwise to decrease door speed, and
counterclockwise to increase door speed. The latch speed and
main speed should be adjusted together.
BC
BC
M
D
L
* Optional
2 Hold Open Arm Adjustment.
The Hold open Arm installs like the regular closer arm. Follow
L
steps 5 - 7 on pages 2, 3, and 4 for Hold open Arm installation.
Top Jamb mount handing for Hold open Arms is reverse of other
L
mounts.
To adjust optional Hold-open arm:
1. Loosen hold open nut.
2. Open door to 5° less than desired hold
position and tighten hold open nut
securely.
Picture Cylinder
Mounting
4 @ #14 x 1C\," 4 @ #14- 1C\,"
4 @ Z\v-20 x 1"
4 @ #14 x 1Z\x" 4 @ #14 x 1Z\x"
Picture
Used when mounting through door.
1 M6 x 10mm for attachment of the arm (see step 6).
5
D
= Backcheck valve
= Main speed valve
= Delay speed valve*
= Latch speed valve
PA Bracket PA Shoe
Mounting Mounting
4 @ Z\v-20 x B\," 2 @ Z\v-20
x C\,"
notes
M
L
L
M
D*
BC
5th Hole Mounting
(PA Shoe only)
1 @ #14 x 2"
1 @ Z\v-20 x 1Z\x"
1 @ #14 x 2"