LCN 1250 Serie Instrucciones De Instalación 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 the closer valves
described below.
a. Backcheck- this controls door speed opening as the door
angle approaches 90°. Do not use as a door stop.
b. Main Speed- 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- this controls door speed during the last few
degrees of door closing.
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
= Main speed valve
M
= Latch speed valve
L
2 Hold Open Arm Adjustment.
L The Hold Open Arm installs like the regular closer
arm. Follow steps 5 - 7 on page 2 for Hold Open Arm
installation.
L Top Jamb mount handing for Hold Open Arms is reverse
of other 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 @ 1 C\zn"
4 @ 1"
4 @ 1 Z\x"
Picture
Used when mounting through door.
1 M6 x 10mm for attachment of the arm (see step 6).
5
BC
= Backcheck valve
PA Bracket PA Shoe
Mounting Mounting
4 @ 1 C\,"
4 @ B\," 2 @ C\,"
4 @ 1 Z\x"
Notes
M
L
L
M
BC
5th Hole Mounting
(PA Shoe Only)
1 @ 2"
1 @ 1 Z\x"
1 @ 2"