System Sensor B110LP User Manual

D150-05-00 1 I56-594-03R

B110LP Plug-in Detector Base

For use with the following smoke detectors:
IN US: 1151, 2151
IN CANADA: 1151A, 2151A
IN EUROPE: 1151E, 2151E

INSTALLATION AND MAINTENANCE INSTRUCTIONS

3825 Ohio Avenue, St. Charles, Illinois 60174

1-800-SENSOR2, FAX: [phone]

Before Installing

Please thoroughly read the System Sensor manual I56-407,
Guide for Proper Use of System Smoke Detectors, which pro­vides detailed information on detector spacing, placement,
zoning, wiring, and special applications. Copies of this
manual are available at no charge from System Sensor. (For
installation in Canada, please refer to CAN/ULC-S524,
Standard for the Installation of Fire Alarm Systems and CEC
Part 1, Sec. 32.)

NOTICE: This manual should be left with the owner/user
of this equipment.

IMPORTANT: The detector used with this base must be
tested and maintained regularly following NFPA 72 require­ments. The detector used with this base should be cleaned
at least once a year.

Specifications

Base Diameter: 6.2 inches (157 mm)
Base Height: 0.95 inches (24 mm)
Weight: 0.3 lb. (137 g)
Mounting: 4-inch square box with or without plaster ring. Min. depth–1.5 inches

3-1/2-inch octagon box. Min. depth–1.5 inches
Operating Temperature Range: 0° to 49°C (32° to 120°F)
Operating Humidity Range: 10% to 93% Relative Humidity, Noncondensing

Electrical Ratings - includes base and detector

System Voltage: 12/24 VDC
Maximum Ripple Voltage: 4 Volts peak-to-peak
Start-up Capacitance: 0.02 µF Maximum
Standby Ratings: 8.5 VDC Minimum

35 VDC Maximum

120 µA Maximum
Alarm Ratings: 4.2 VDC Minimum at 10 mA

6.6 VDC Maximum at 100 mA

(Alarm current must be limited to 100 mA (130 mA for models 1151 and 2151) by the

control panel. If it is used, the RA400Z Remote Annunciator operates within the specified

detector alarm currents.)
Reset Voltage: 2.5 VDC Minimum
Reset Time: 0.3 Seconds Minimum
Start-up Time: 34.0 Seconds Maximum

General Description

The Model B110LP detector base is designed for use with
System Sensor models 2151 photoelectronic and 1151 ion­ization detector heads. This two-wire base is equipped with
screw terminals for the connection of power, ground, and
an optional remote annunciator.

Mounting

The detector base mounts directly to 3-1/2 inch and 4-inch
octagon boxes and 4-inch square boxes, with or without
plaster rings. To mount the base, remove the decorative
ring by rotating it in either direction to unhook the snaps
before separating the ring from the base. Use the screws
supplied with the junction box to attach the base to the box
through the appropriate slots in the base (see Figure 1).
Position the decorative ring around the base and rotate it in
either direction until the ring snaps into place.

D150-05-00 2 I56-594-03R

Installation Guidelines

Allowable loop resistance is an important specification for
control panels as well as for smoke detectors and their
bases. The alarm system cannot be expected to operate cor­rectly if system components have incompatible allowable
loop resistances.Therefore, before beginning installation,
refer to the control panel manufacturer’s loop resistance
specification to ensure that it is listed as compatible with
the System Sensor base and smoke detector being installed.

System Sensor smoke detectors and mounting bases are
marked with a compatibility identifier as the last digit of a
five-digit code stamped on the back of the product.
Connect detectors only to compatible control units as indi­cated in System Sensor’s compatibility chart. This chart
consists of a current list of UL-listed control unit/detector
combinations and is available from System Sensor upon
request.

All wiring must be installed in compliance with the
National Electrical Code and all applicable local codes and
any special requirements of the authority having jurisdic­tion, using the proper wire size. The conductors used to
connect smoke detectors to control panels and accessory
devices should be color-coded to reduce the likelihood of
wiring errors. Improper connections can prevent a system
from responding properly in the event of a fire.

For signal wiring (the wiring between interconnected
detectors), it is recommended that the wire be no smaller
than AWG 18. However, the screws and clamping plate in
the base can accommodate wire sizes up to AWG 12. The
use of twisted pair wiring for the power (+ and -) loop is
recommended to minimize the effects of electrical interfer­ence.

NOTE: To ensure that electrical connections are super-

vised, do NOT loop wires under terminals 2, 3, and
5 - break the wire at each terminal.

To make electrical connections, strip approximately 3/8" (1
cm) insulation from the end of each wire. Slide the wires
under the clamp plate and tighten the terminal screw.

Check the zone wiring before installing the smoke detector
head. The built-in shorting spring makes it convenient to
do this. After the detector base is wired and attached to the
electrical box, position the shorting spring against terminal

3. Use the slot in the retaining clip to hold the spring
against the terminal, as shown in Figure 1. This shorts the
negative-in and negative-out leads so that loop wiring can
be tested for continuity.

The shorting spring in the base will disengage automatical­ly when the detector head is removed from the base. DO
NOT remove the shorting spring since it reengages as the
detector head is turned into the base, completing the cir­cuit.

Tamper-resistance Feature

NOTE: DO NOT use the tamper-resistance feature if the

System Sensor XR2 Removal Tool will be used to
remove detectors from the base.

This detector base can be made tamper resistant so that the
detector cannot be detached without the use of a tool. To
make the base tamper-resistant, break off the smaller tab at
the scribed line on the tamper-resistance tab, on the detec­tor mounting bracket (see Figure 3A), before installing the
detector.

SNAP ON
DECORATIVE
RING

SCREWS (NOT
SUPPLIED)

DETECTOR
BASE

BOX (NOT
SUPPLIED)

SHORTING
SPRING

Figure 1. Mounting base to box:

A78-1175-01