LCN 4050 Serie Manual Del Usaurio página 5

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.
L Valve must be closed CW to seat, never more than 3 turns
CCW 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!
L DO NOT ADJUST THE LATCH SPEED IF THE DOOR DOES
NOT 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 a 3/32" hex
wrench to adjust 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 (MD)- this controls main speed for standard
1a 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 Screw Pack
Fifth Hole Spacer Standard
Arm Screw Standard
Closer Valve Adjustment
CAUTION
Optional Hold Open Arms
LH
180° Mounting Hold
Open (120°-180°)
120° Mounting Hold
Open (95°-120°)
100° Mounting Hold
RH
Open (85°-100°)
RH
Screw Pack Picture
Wood &
Machine
Screw Pack
(WMS)
Standard
Standard
Picture Notes
cylinders and the delay speed for delay (DA) cylinders.
c. DA Main Speed (M)- this controls the main speed for DA
cylinders. This valve is present on DA cylinders only.
d. Latch Speed (L)- this controls door speed during the last
few degrees of door closing.
e. PA Selector (P)- this needs to be turned in completely for
Parallel Arm (PA) mounting.
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.
L M
= Backcheck valve
BC
= Main speed valve
M MD
= Latch speed valve
L
= PA selector valve
P
1b Hold Open Arm Adjustment.
L The Hold Open Arm installs like the regular closer arm.
Follow steps 5 - 7 on pages 2, 3, and 4 for Hold Open Arm
installation.
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.
Cylinder PA Bracket
Mounting Mounting
4 @ 2 Z\v" 4 @ B\,"
4 @ 3 Z\," 4 @ 1 C\,"
4 @ 2 M\," 4 @ 1 Z\x"
Screw Type Screw Pack
Pinion Attachment Standard
Screw
Thru Bolt Order TB
Screw pack
5
BC
MD P
P
M
BC
PA Shoe 5th Hole Mounting
Mounting (PA Shoe Only)
2 @ C\," 1 @ 1 Z\x"
1 @ 2"
1 @ 2"
Picture Notes
Z\v-20 for
attachment of the
arm (see step 6).
1 >\cx" or
1 ZM\cx" or
1 XZ\cx"
L