Chamberlain Merlin Professional MT230, Installation And Operating Instructions Manual, Page: 14 / 24

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travel
DOWN
LIMIT
UP LIMIT
12Vdc
+
3 1
2
com IR P/B
manual control
remove
for setup
manual
control
close
operate
learn
132A2663
open
roller:L R
roller:L
R
0s/off
60s
180s
timer to
close
clos
e
op
er
at
e
lear
n
132 A26 63
op
en
ro
lle
r:L
R
ro
lle
r:L
R
0s/
of
f 60
s
18
0s
tim
er
to
clo
se
22 SETTING AUTO CLOSE (OPTIONAL)
NOTE: The Protector System
TM
MUST be installed
to enable this feature.
The auto close feature will automatically close the
garage door after the preset time. The time can be
adjusted up to 180 seconds using the trim pot located
on the control board. Auto close can be disabled by
adjusting the trim pot to the 0s/off setting.
Installing and adjusting:
• Close the garage door.
• Turn the opener off.
• Remove the lamp cover.
• Ensure the trim pot on the opener is set to the 0s/off.
• Install
The Protector System
TM
using the brackets,
wires and instructions provided with the product.
Twist the two white (only) wires together and termi-
nate them into the white (2) terminal. Twist the two
white/black wires together and terminate them into
the grey (3) terminal.
• Turn the opener on.
• Allow 5 minutes for the beams to self-learn to the unit
(do not walk through the beam during this time).
• Ensure the door is in the closed position, then adjust
the trim pot to the desired closing time by turning the
“timer to close” trim pot anti-clockwise (label indi-
cates approximate Timer To Close values).
Test the timer to close feature:
• Once the timer is set open the door and allow it to
close via the “timer to close” feature.
NOTE: If more or less time is desired, adjust the
trim pot whilst the door is closed then repeat test
outlined above.
Auto close is NOT recommended for
households with young children.
Do not adjust the trim pot whilst the door is
in the open position.
Door will activate when the trim pot is adjust-
ed in the open position
Fig. 1