User manual LIFT-MASTER LM21XP

[. . . ] 845 Larch Avenue Elmhurst, Illinois 60126-1196 www. liftmaster. com OWNER'S MANUAL MODEL LM21XP EXTENDED PERFORMANCE RELEASE DEVICE TABLE OF CONTENTS INTRODUCTION General Description . . 3 WARNING Mechanical INSTALLATION WARNING CAUTION Important Installation Warnings . . 6 Connections of Initiating Devices and Accessories . . 8-9 CAUTION WARNING WARNING Electrical WARNING CAUTION 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. [. . . ] NOTE: For low voltage wiring #18 AWG is recommended. Normally Open "2-Wire, " Class B Style A Initiating Devices Connect wiring from N/O initiating device loop to positions 3 and 4. Place the supervisory resistor (10k ohm @ 1/2 watt) contained within the accessory pack. Observe proper polarity, 3 (+), 4 (­) when attaching to the release device's terminal board. NOTE: Make certain that the factory-installed jumper between terminal positions 5 and 6 remains in place. This option is a supervised, current-limited circuit. OR Normally Open "4-Wire, " Class B Style A Initiating Devices Connect wiring from N/O 4-Wire initiating device loop to positions 3 and 4, making sure an end-of-line supervisory resistor (10k ohm @ 1/2 watt) is installed as shown in Figure 4 or 5, depending upon the type of smoke detector being used. Observe proper polarity, 3 (+), 4 (­) when attaching to the release device's terminal board. NOTE: Make certain that the factoryinstalled jumper between terminal positions 5 and 6 remains in place. This option is a supervised, current-limited circuit. OR Normally Closed "4-Wire, " Class B Style A Initiating Devices After removing the factory-installed jumper between terminal positions 5 and 6, connect wiring from N/C 4-Wire initiating device loop to positions 5 and 6 (Figure 6). This option is a supervised, current-limited circuit. Most commonly, a relay module is used as an interface between the fire alarm control panel and the release device. The relay module must provide Form C dry contacts for connection to the appropriate terminals on the release device (Figure 7). NOTE: When choosing a relay module to activate the release device in an alarm condition, always select one that provides Form C dry contact relays. Do not use any relay module providing or passing any (control) voltage through the contacts into the release device. The passage of voltage through such a relay module into the release device will cause problems with the operation of the device and may damage the device's terminals and/or circuit board. WARNING CAUTION To prevent DAMAGE to the circuit board, ALL connections from terminals 3 through 16 MUST be dry contact type. FIGURE 7 Relay Module 5 Common Red ­ Black Fire Alarm Control Panel 6 Terminal Strip Normally Closed + FIGURE 8 7 Attach to Common on N/O Proximity Switch Attach to N/O Position on Proximity Switch OPTIONAL CONNECTIONS CLOSE DOOR DETECTION OPTION Connect wiring from N/O electrical loop, using a proximity switch or other similar device with dry contacts, to 7 and 8 (Figure 8). The switch should be placed to engage when the door is in the closed position and so that it will toggle states from its N/O condition (switch closed when door is closed) to a closed condition indicating that the door edge has made contact with desired down position. When the switch is closed by contact from the door, the release device will not activate on alarm, thereby eliminating nuisance gravity drops through the inadvertent release of the fusible link assembly. This option only works as long as power is available to unit. Fail-safe operation is maintained under all operating conditions, and if power is not available to the unit, the fusible link assembly will be released. This is a power-limited, unsupervised circuit. [. . . ] If not, the release device will not release the fusible link assembly in a fire condition. Conversely, the release device will always release the fusible link assembly when powered or reset. Are the Alarm Inputs correct?There should not be any voltage on the alarm lines when they are disconnected from the unit. Check to see if it is tied into an addressable relay module of an alarm panel. [. . . ]