LiftMaster LM21XPBB User Manual

OO WW NN EE RR ’’ SS MM AA NN UU AA LL

MM OO DD EE LL SS

LL MM 22 11 XX PP BB BB

LL MM 22 11 XX PP BB BB VV BB

EEXXTTEENNDDEEDD PPEERRFFOORRMMAANNCCEE RREELLEEAASSEE DDEEVVIICCEE

APPROVED

The Chamberlain Group, Inc.
845 Larch Avenue
Elmhurst, Illinois 60126-1196

www.liftmaster.com

When you see these Safety Symbols and Signal Words on the
following pages, they will alert you to the possibility of serious
injury or death if you do not comply with the warnings that
accompany them. The hazard may come from something
mechanical or from electric shock. Read the warnings carefully.

When you see this Signal Word on the following pages, it will
alert you to the possibility of damage to your door and/or the
door operator if you do not comply with the cautionary
statements that accompany it. Read them carefully.

Mechanical

Electrical

TABLE OF CONTENTS

WARNINGWARNING

WARNING

WARNINGWARNING

WARNING

CAUTIONCAUTION

WARNING

WARNING

2

INTRODUCTION

General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Agency Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

INSTALLATION

Important Installation Warnings . . . . . . . . . . . . . . . . . . . . . . . . . .4

Mount the Release Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

WIRING

Wiring Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Wire Routing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Connections of Initiating Devices and Accessories . . . . . . . . . .8-9

Optional Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9-10

TESTING

Test Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

TROUBLESHOOTING

Operational Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

MAINTENANCE

Maintenance Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Enclosure Mounted LEDs Status Indicators . . . . . . . . . . . . . . . .13

ACCESSORIES AND REPAIR PARTS

. . . . . . . . . . . . . . .14

APPENDIX

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

IMPORTANT NOTES:

• BEFORE attempting to install, operate or maintain the release
device, you must read and fully understand this manual and
follow all safety instructions.

• DO NOT attempt repair or service of your release device unless
you are an Authorized Service Technician.

GENERAL DESCRIPTION

The LiftMaster®LM21XPBB and LM21XPBBVB Release Device is
UL/ULC listed normally energized fail-safe device designed for
use on rolling doors, single-slide and center-parting level and
inclined track doors. All models are normally energized fail-safe
releasing devices incorporating state-of-the-art electronic control
circuitry. The release devices respond to emergency conditions
generated from an automatic initiating device and are used in
conjunction with a fusible link system.

The release device can be powered from 120Vac, 24 Vac, or
24Vdc. The 24Vdc cannot be sourced from a fire alarm control
panel or UL1481 regulated power supply. The devices can be
activated via a smoke detector or an alarm relay from the panel’s

Form C dry contact relay. The release device features include a
10, 20, 30 or 60 second delay on alarm, closed door detection
capabilities, Form C relay outputs for the transmission of alarm
and trouble signals transmitted to the fire alarm control panel, an
audible trouble sounder, and diagnostic feedback LEDs.

The release device is provided with a battery management system
that can provide 24Vdc power for up to four smoke detectors and
two horn strobes, as well as provide battery backup for the
release device and accessories. As with all releasing device
systems, maximum fire protection is provided when installed in
accordance with factory specifications and used with a fusible link
systems.

INTRODUCTION

INTRODUCTION

3

AGENCY REQUIREMENTS

Installation and testing to factory specifications shall be
performed by factory authorized personnel for proper operation in
accordance with the latest National Fire Protection Association
(NFPA), Underwriters Laboratories (UL), National Electrical Code
(NEC), local, state, county, district and/or other applicable
building and fire standards, guidelines, regulations and codes
including, but not limited to, all appendices and amendments and
the requirements of the local authority having jurisdiction (AHJ).

SPECIFICATIONS

To prevent possible SERIOUS INJURY or DEATH:

• DO NOT use this device without fusible links installed.

• Test every 90 days to assure proper operation of release

device.

WARNINGWARNING

WARNING

VOLTAGE RATING: 120Vac, 60Hz; 24Vac, 60Hz; 24Vdc
STANDBY CURRENT .06A, .3A, .2A
ALARM CURRENT .06A, .3A, .25A
BATTERY RATING: 12V 4.5AH Sealed Lead Acid

Battery, Maximum charge current
.150Amps

BATTERY STANDBY TIME: LM21XPBB, 72 Hours

LM21XPBBVB, 24 Hours

LOAD RATING: Support and Release 40 lbs. Max.
PHYSICAL DIMENSIONS: 9.7" x 7.5" x 5" (h x w x d)

PREPARATION

It is imperative that the wall or mounting surface provide
adequate support for the release device.

Refer to the door manufacturer’s recommendations for use of this
product with specific door being utilized. Use only hardware
approved or recognized by the appropriate testing and listing
agencies in conjunction with the installation of this product.

Additional items may be required to complete the installation:

• Concrete anchors or fasteners

• Sash chain or 1/16 cable

• Eyebolts-hook

• Fusible links

• Turnbuckles

• Smoke detectors (up to 4 may be installed with this device)

Refer to NFPA 72 and NFPA 80 for instructions concerning proper
placement and detection coverage. End-of-line devices shall be
installed for supervision of electrical power to 4-wire smoke
detector. When using 4-wire smoke detectors with this device,
electrical supervision must be provided by means of a UL/ULC
listed end-of-line relay.

ELECTRICAL SPECIFICATIONS

MECHANICAL SPECIFICATIONS

FUSES: 3A @ 250V, 2AG Slo-Blo Type
INITIATING DEVICE: Maximum line impedance 20 ohm;

Maximum current not to exceed
.010A.; Maximum voltage 24Vdc

AUXILIARY POWER: 24Vdc @ .5A Maximum
COMMON ALARM AND

TROUBLE RELAYS:

.5A 125Vac 60Hz

(MAX. CONTACT RATING) 1A 24Vdc Resistive

WEIGHT: Approximately 18 lbs.
(INCLUDING BATTERIES)

Smoke Detector

Releasing Unit

Turnbuckle

Annunciator

Chain

Fire Door

Chain End
Link

Fusible Links

Eyebolt

4

INSTALLATION

Classification:

Releasing device as defined by Underwriters Laboratories.

Installation Requirements:

Intended for “Indoor Dry” locations; all wiring must be performed
in accordance with the most current version of NFPA 72 - National
Fire Alarm Code and the National Electric Code.

MOUNT THE RELEASE DEVICE

Installation procedures vary according to door types. Refer to
door manufacturer’s recommendation that applies to your door.

1. Mount the release device on a vertical surface with chain end
link exiting side of enclosure.

2. Secure the release device enclosure with fasteners (#10 is the
minimum size recommended). If installing in masonry, use
concrete anchors (not provided).

3. Install hardware (sash chain or 1/16" cable, eyebolts-hook,
fusible links, turnbuckles—not provided) according to door
manufacturer’s recommendations. NOTE: The end link direction

of pull must be perpendicular to the side of the release device
enclosure. Install an eyebolt a minimum distance of 12" from
the release device to adequately redirect sash chain pull.

4. Install end link by pressing mechanical reset to allow insertion
of end link. Push end link completely in and release mechanical
reset to latch end link.

5. Remove sash chain or cable slack by adjusting turnbuckle.

IMPORTANT INSTALLATION INSTRUCTIONS

To reduce the risk of SEVERE INJURY or DEATH:

WARNING

WARNINGWARNING

1. READ AND FOLLOW ALL INSTALLATION WARNINGS
AND INSTRUCTIONS.

2. NEVER connect release device to power source until
instructed to do so.

3. DO NOT use this device without fusible links installed.

4. Concrete anchors MUST be used if mounting release
device into masonry.

5. DO NOT exceed maximum pull rating of 40 lbs. on
releasing device.

Smoke Detector

Releasing Unit

Turnbuckle

Annunciator

Chain

Fire Door

Chain End
Link

Fusible Links

Eyebolt

End Link

Mechanical Reset
Plunger

1

2

+

–

5

WIRING

WIRING INSTRUCTIONS

Verify wiring configuration with that recommended by door
manufacturer for use of this product with specific door and
accessories being utilized. The use of 18 AWG wire is
recommended.

1. Close fire door prior to ANY wiring.

2. Turn off power supply sources for the release device as well as
the door operator, before beginning.

3. Verify voltage rating of release device to power source being
utilized. Voltage is indicated on the side of the unit. Verify that
power is disconnected before proceeding.

4. When powering the device from 120Vac line voltage, locate the
3-position terminal block mounted within the device enclosure.
Connect 120Vac (single phase) power source inputs to
terminals L1 (line) and L2 (neutral) of the terminal block
(Figure 1). The third position is used for earth ground.

5. When powering the device from 24Vac or 24Vdc power,
connect to terminal board positions 1 and 2 (Figure 2).
Observe proper polarity.

6. Do not connect line power or battery until all field wiring is
complete per the following pages. The battery provides backup
power in the event of a loss of line voltage and prevents the
release of the fusible link assembly and the resulting door
closure. A pulsing sounder occurs when the battery is
disconnected or when replacement is required. The battery also
provides power to the various ancillary devices (i.e., smoke
detectors, horn/strobes, etc.).

To reduce the risk of SEVERE INJURY or DEATH:

• ALL electrical connections MUST be made by a qualified
individual.

• Disconnect power at the fuse box BEFORE proceeding. Release
device MUST be properly grounded and connected in
accordance with local electrical codes.

• Installation of ALL wiring and connections, including Class 1
and Class 2 circuits, shall be performed in accordance with,
but not limited to, the latest NFPA, UL and N.E.C. standards
and codes. In addition, ALL installations subject to Canadian
standards shall be performed in accordance with the Canadian
Electrical Code, Part I, with respect to wiring material type,
wiring gauge related to power capacity requirements and
circuit length and wiring methods.

• ALL power wiring should be on a dedicated circuit and well
protected. The location of the power disconnect should be
visible and clearly labeled.

• ALL power and control wiring MUST be run in separate
conduit.

• 120Vac should ONLY be attached to the 3-position terminal
block mounted within the enclosure.

• DO NOT disconnect battery or remove battery fuse while unit
is under power, the door will drop.

WARNING

WARNINGWARNING

FIGURE 2

To prevent DAMAGE to the circuit board, ALL connections from
terminals 3 through 16 MUST be dry contact type.

WARNING

CAUTIONCAUTION

WARNING

WARNING

FIGURE 1

Power Strip

Ground

L2

Option DIP
Switch

L1

Mechanical Reset
Plunger

24Vac or 24Vdc