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PINNING THE DOOR

Note: A ballooning door may delay the safety reversal
response and can compromise garage door security.

• To remedy any ballooning place self tapping metal screws

or rivets where the curtain leaves the roll. Secure these
through the curtain into the drum wheel at each end of the
roll.

• After determining the correct fastener location as shown, lift

the door approximately half a turn from the closed position
to allow access for drilling.

Free curtain

Ballooning

Add fasteners here

Door closed

Door can be
lifted

Door secure

Release cable

Rope

Manual release
warning label

Release handle

Overhand knot

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MR850

Learn (down)
button

Limit (up)
button

Start / Stop
Activation button

THE RELEASE HANDLE & CORD

• Thread one end of the rope through the hole in the top

of the red release handle so that “NOTICE” reads
right side up as shown.

• Secure with an overhand knot at least 25mm from the

end of the rope to prevent slipping.

• Thread the other end of the rope through the loop of

the manual release cable.

• Adjust rope length so the handle (when installed) will

be no higher than 1.8m above the floor. Secure with

an overhand knot. If the door is greater than 2.5m in
height the release cord extension kit accessory is
required.

NOTE: Final adjustment of handle height should be
completed after the opener is installed. If it is
necessary to cut the rope, heat seal the cut end to
prevent unravelling (refer section 16).

7

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MR850

Pull down
FIRMLY

click

9

4

To disengage the opener
Pull the release cord down firmly,
(opener will make a clicking noise).

To re-engage the opener
Pull the release cord down firmly,
(opener will make a clicking noise).

Disable all locks and remove any ropes connected to the garage door.
Take care when operating the manual release as an open door may fall rapidly due to weak or
broken springs, or being out of balance.

OPERATING THE MANUAL RELEASE

8

Summary of Contents for Merlin Professional MR650

Page 1: ...g Garage Door Opener Installation and Operating Instructions Owners Copy Please keep these instructions for future reference This manual contains IMPORTANT SAFETY information DO NOT PROCEED WITH THE I...

Page 2: ...d and follow all instructions carefully The garage door opener is designed and tested to offer safe service provided it is installed and operated in strict accordance with the instructions in this man...

Page 3: ...e edge of the bracket If the roller door drum is on the edge of the curtain or is a smaller diameter additional clearance may be required If the drum is more than 60mm from the curtain edge or of a sm...

Page 4: ...against the boss of the door drum Ensure the U bolt holding the door shaft to the door bracket is tightly secured INSTALLING THE STOP COLLAR 5 Place the weight in the centre of the door as shown Use a...

Page 5: ...shown Secure with an overhand knot at least 25mm from the end of the rope to prevent slipping Thread the other end of the rope through the loop of the manual release cable Adjust rope length so the ha...

Page 6: ...ive leg and fix in place using screws provided Slide the reinforcing brace over the poles and fix in place using the screws provided ATTACHING EXTENSION POLES IF REQUIRED 10 LEFT RIGHT HAND INSTALLATI...

Page 7: ...nsions may be necessary refer section 10 Refit the door mounting bracket to the wall If the door bracket needs to be relocated due to opener width refer section 3 Clamp the opener on the door axle and...

Page 8: ...Ensure the door is positioned halfway the opener is engaged and the power is turned on Press and hold the LMT Limit button until the orange indicator LED starts flashing and then release Either right...

Page 9: ...your installation and successfully carried out the safety reverse system test outlined above install the warning labels provided with your opener as shown The risk of entrapment label must be install...

Page 10: ...pener off Install the Protector SystemTM using the brackets wires and instructions provided with the product Twist the two white only wires together and terminate them into the white 2 terminal Twist...

Page 11: ...should be pre programmed by the factory If adding a new wall control program into the opener before mounting the unit as detailed in section 19 professional LRN Press LRN or LED will FLASH TO ADD Tran...

Page 12: ...e on the keypad 2 then press and hold the ENTER button 3 Release the button when the opener courtesy LEDs flash once 3 the code is learned Alternate programming method using the motion detecting contr...

Page 13: ...DC power output for external devices MR850 only 3 Voltage free door monitoring output MR850 only 4 The Protector SystemTM IR Beams C77 5 Motion detecting control panel C98 6 Standby Power Unit battery...

Page 14: ...2B1600 22 SPARE PARTS 041A6811 Mount plate sub assembly MR850 including motor 041A6812 Sungear kit 041A6813 Front upper housing 041A6814 Base housing MR850 041A7292 Base housing MR650 041D6637 PCB for...

Page 15: ...less finger print access system 8 Model C98 Motion detecting control panel 9 Model 760 Outside keyswitch 10 Model CM1702 Outside quick release 11 Model C77 The Protector System IR Beams 12 Model FLA24...

Page 16: ...or flashing Realign receiving eye sensor clean lens and secure brackets Symptom The RPM Sensor Short travel 150 200mm 6 8 Unplug unit to reset Try to operate opener check diagnostic code If it is sti...

Page 17: ...r binding call a trained door systems technician Clear any ice or snow from the garage floor area where the door closes Repeat the limit and force setting in section 13 14 Repeat safety reverse test a...

Page 18: ...necessary adjustments sections 13 14 Manually operate door If it is unbalanced or binding call for professional garage door service Check to be sure door opens and closes fully SPECIAL NOTE Chamberlai...

Page 19: ...nd or workmanship for a period of 2 YEARS from the date of first purchase from the Seller The MR850 DC motor only has a 5 year warranty from the date of first purchase from the seller when installed o...

Page 20: ...114B3630D 2009 The Chamberlain Group Inc TM Trademark of The Chamberlain Group Inc Registered Trademark of The Chamberlain Group Inc...

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