System Sensor B112LP - Installation Manual



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D150-03-00 1 I56-597-03R
B112LP 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: 630-377-6495
Before Installing
Please thoroughly read the System Sensor manual I56-407,
Guide for Proper Use of System Smoke Detectors, which pro-
vides 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, 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 require-
ments. 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: 24 VDC
Maximum Ripple Voltage: 4 Volts peak-to-peak
Start-Up Capacitance: 0.02µF Maximum
Standby Ratings: 20 VDC Minimum
29 VDC Maximum
120 µA Maximum
Alarm Ratings: 17 mA Minimum
36 mA Maximum
Reset Voltage: 1.4 VDC Minimum
Reset Time: 0.3 Seconds Maximum
(The optional RA400Z operates within specified detector alarm currents.)
Start-up Time: 34.0 Seconds Maximum
Relay Contact Ratings:
Resistive or Inductive (60% Power Factor)
Form A: 2.0 A @ 30 VAC/DC
Form C: 2.0 A @ 30 VAC/DC
0.6 A @ 110 VDC
1.0 A @ 125 VAC
General Description
The Model B112LP detector base is designed for use with
System Sensor model 2151 photoelectronic and 1151 ioniza-
tion detector heads. This four-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.
D150-03-00 2 I56-597-03R
Installation Guidelines
NOTE: Refer to the releasing device manufacturer’s
instructions for connection instructions.
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 cor-
rectly 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.
All wiring must be installed in compliance with the
National Electrical Code, 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.
Wiring
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 interfer-
ence.
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.
If the base is being installed in a zoned system, 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 electri-
cal 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 automatical-
ly 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 cir-
cuit.
SNAP ON
DECORATIVE
RING
SCREWS (NOT
SUPPLIED)
DETECTOR
BASE
BOX (NOT
SUPPLIED)
SHORTING
SPRING
A78-1175-01
Figure 1. Mounting base to box:
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 the
detector cannot be removed 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 detec-
tor mounting bracket (see Figure 3A), before installing the
detector.
To remove the detector from the base after it has been
made tamper resistant, remove the decorative ring by rotat-
ing it in either direction and pulling it away from the base.
Then, insert a small screwdriver into the notch, as indicat-
ed in figure 3B, and press the plastic lever toward the
mounting surface before rotating the detector counter-
clockwise for removal.
D150-03-00 3 I56-597-03R
DETECTOR
POWER LOOP
(+)
(–)
ALARM
INITIATION LOOP
FCI
CONTROL PANEL
ALARM RELAY
AUXILIARY CONTACTS
N.O.
12
N.C.
13
C.
14
(2.8 VDC)
(+) (—)
1 4
ALARM
RELAY
REMOTE
ANNUNCIATOR
OUTPUT
(+IN) 2 3 (+OUT)
SPORTING
SPRING
5 (–IN, –OUT)
(IN)
10
(OUT)
11
ALARM RELAY
8
(IN)
9
(OUT)
FIRST DETECTOR IN LOOP
ALARM RELAY
AUXILIARY CONTACTS
N.O.
12
N.C.
13
C.
14
(2.8 VDC)
(+) (—)
1 4
ALARM
RELAY
REMOTE
ANNUNCIATOR
OUTPUT
(+IN) 2 3 (+OUT)
SPORTING
SPRING
5 (–IN, –OUT)
(IN)
10
(OUT)
11
ALARM RELAY
8
(IN)
9
(OUT)
FIRST DETECTOR IN LOOP
EOL
RESISTOR
EOL RELAY
(+)
(–)
NOTE: Schematic
Shown for
Reference
1
2
3
4
5
8
9
10
11
12
13
14
U
L

L
I
S
T
E
D

4
-
W
I
R
E

C
O
N
T
R
O
L

P
A
N
E
L
REMOTE
ANNUNCIATOR
RELEASING
DEVICE
(OPTIONAL)
1
2
3
4
5
8
9
10
11
12
13
14
REMOTE
ANNUNCIATOR
POWER LOOP +
POWER LOOP —
ALARM CIRCUIT
RELEASING
DEVICE
(OPTIONAL)
EOL RELAY
+

+

+

E
O
L
Figure 2. Typical wiring diagram:
Figure 3A. Activating the tamper-resistance feature:
PLASTIC LEVER
BREAK TAB AT
DOTTED LINE BY
TWISTING TOWARD
CENTER OF BASE.
USE SMALL-BLADED
SCREWDRIVER TO
PUSH PLASTIC LEVER
IN DIRECTION OF
ARROW.
Figure 3B. Removing detector head from base:
D150-03-00 4 I56-597-03R
©2001 System Sensor
Three-Year Limited Warranty
System Sensor warrants its enclosed smoke detector base to be free from
defects in materials and workmanship under normal use and service for a
period of three years from date of manufacture. System Sensor makes no
other express warranty for this smoke detector base. No agent, represen-
tative, dealer, or employee of the Company has the authority to increase
or alter the obligations or limitations of this Warranty. The Company’s
obligation of this Warranty shall be limited to the repair or replacement of
any part of the smoke detector base which is found to be defective in
materials or workmanship under normal use and service during the three
year period commencing with the date of manufacture. After phoning
System Sensor’s toll free number 800-SENSOR2 (736-7672) for a Return
Authorization number, send defective units postage prepaid to: System
Sensor, Repair Department, RA #__________, 3825 Ohio Avenue, St.
Charles, IL 60174. Please include a note describing the malfunction and
suspected cause of failure. The Company shall not be obligated to repair
or replace units which are found to be defective because of damage,
unreasonable use, modifications, or alterations occurring after the date of
manufacture. In no case shall the Company be liable for any consequen-
tial or incidental damages for breach of this or any other Warranty,
expressed or implied whatsoever, even if the loss or damage is caused by
the Company’s negligence or fault. Some states do not allow the exclusion
or limitation of incidental or consequential damages, so the above limita-
tion or exclusion may not apply to you. This Warranty gives you specific
legal rights, and you may also have other rights which vary from state to
state.
Please refer to insert for the Limitations of Fire Alarm Systems


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