CENTERLINE Motor Control Centers Bulletin 2100 Smoke Detector

CENTERLINE Motor Control Centers Bulletin 2100 Smoke Detector
Instructions
CENTERLINE Motor Control Centers
Bulletin 2100 Smoke Detector Unit
Catalog Number 2100-SD1
Description
The Bulletin 2100 smoke detector unit is a 0.5 space factor unit for use
in Bulletin 2100 CENTERLINE motor control centers. It alerts the user
to possible failures in the motor control center, primarily due to
insulation breakdown, which is not normally detected by overcurrent
devices. Examples of failures include insulation end of life, loose
connections, misapplication of overload devices, and overload device
malfunctions.
ATTENTION
!
1
The smoke detector is a reactive device. Therefore, if
the smoke detector is activated, a problem situation
is occurring or has occurred. This activation may
indicate toxic fumes, high temperatures, possibility
of fire, deterioration of insulation, etc. Proper steps
should be taken to disconnect power to the motor
control center, and extreme care should be exercised
when approaching the equipment.
Publication 2100-IN046B-EN-P—November 2001
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CENTERLINE Motor Control Centers Bulletin 2100 Smoke Detector Unit
Location
The location and placement of the smoke detector unit in the motor
control center is important. The smoke detector unit is to be located
in the bottommost 0.5 space factor unit location. For motor control
center lineups of five (5) sections or less, place one (1) smoke
detector unit in the middle of the lineup. For lineups greater than five
(5) sections, place one (1) smoke detector in the third section from
one end, and evenly space additional smoke detectors (every third
section is recommended).
IMPORTANT
There never should be more than four adjacent
sections without a smoke detector unit (refer to
Figure 1).
To assure the most efficient operation, Packaged Control Products
recommends the installation of bottom plates in motor control centers
containing smoke detector units.
Location
Smoke detector units
Figure 1 Correct placement of smoke detector units
Operation
A separate 120 volt, 60 Hz, AC power source is required to operate the
unit and its requisite fan, which is necessary for positive pressure. The
120 volt, 60 Hz, AC power source should be connected to terminal
block points X1 and X2 as shown in the unit wiring diagram (Figure
2).
When the selector switch is in the “ON” position, the control relay
(SR) picks up. This causes the normally closed (SR) contact (terminal
Publication 2100-IN046B-EN-P—November 2001
CENTERLINE Motor Control Centers Bulletin 2100 Smoke Detector Unit
3
block points 2 and 3) to open and prevents the “SMOKE ALARM” pilot
light from illuminating.
When the alarm is activated, the control relay (SR) drops out, closes
the normally closed contact (terminal block points 2 and 3), and
illuminates the “SMOKE ALARM” pilot light.
The circuit provides three (3) auxiliary control relay (SR) contacts: two
(2) normally open (N.O.) contacts (terminal block points 2 and 5 and
points 9 and 11) and one (1) normally closed (N.C.) contact (terminal
block points 9 and 10). These may be used for remote alarm
indicators.
Note: If there is a loss of the separate 120 volt, 60 Hz, AC power
source, the relay will drop out, the N.C. contact will close, and the
N.O. contact will open. However, the “SMOKE ALARM” pilot light will
not illuminate. In the remote possibility of internal DC power loss, a
fail-safe condition will occur; that is, the N.C. contacts will close, the
N.O. contacts will open, and the “SMOKE ALARM” pilot light will
illuminate, but the “DC POWER ON” pilot light will not illuminate,
thus indicating a loss of DC power.
To activate the smoke detector unit, turn the smoke detector switch
clockwise to the “ON” position.
Note: The unit must be in the “OFF -RESET-” position for at least 20
seconds before turning the switch to the “ON” position, or a false
alarm may occur.
Publication 2100-IN046B-EN-P—November 2001
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CENTERLINE Motor Control Centers Bulletin 2100 Smoke Detector Unit
Testing
To test the smoke detector unit and circuits:
1. Unlatch and open the smoke detector unit door.
2. Turn the selector switch clockwise to the “ON” position.
3. Refer to the smoke detector manufacturer’s installation
instructions, supplied with the unit documentation, for testing
the “sensitivity level.” Hold a magnet on the “TEST HERE”
position on the smoke detector head as described by the
manufacturer until the “SMOKE ALARM” pilot light illuminates
(approximately 7 to 15 seconds). If the “SMOKE ALARM” pilot
light does not illuminate after 30 seconds, a problem may exist,
such as a loss of AC or DC voltage, a blown fuse, an improper
connection between the smoke detector and the socket, or a
defective smoke detector. Repeat the test procedure if the
“SMOKE ALARM” pilot light does not illuminate.
4. When finished, turn the selector switch counterclockwise to the
“OFF-RESET-” position. Close and latch the unit door. Wait 20
seconds in the “OFF-RESET-” position before turning the unit
on.
Publication 2100-IN046B-EN-P—November 2001
CENTERLINE Motor Control Centers Bulletin 2100 Smoke Detector Unit
DC Voltage Adjustment
5
The DC voltage has been preset at the factory and should not require
adjustment. If the supply voltage is too high or too low, then the
power supply output can be adjusted.
To check the DC voltage, an external voltmeter with a minimum range
of 0-50 Vdc is necessary. Connect the voltmeter between terminal
block point 6 (positive) and terminal block point 8 (negative). If the
unit has the optional DC voltmeter instead of the “DC POWER ON”
pilot light, use this meter for monitoring the voltage. The meter should
read in the range of 22-26 volts. If the voltage is out of that range,
adjust the DC output of the power supply by turning the “voltage
adjustment” potentiometer, as shown in Figure 3.
If the voltage cannot be adjusted to within the 22-26 volt range, a
possible overvoltage or undervoltage situation may exist. Be certain
that the AC voltage is within the range of 105-125 volts.
Voltage adjustment
Figure 2 DC voltage adjustment
Publication 2100-IN046B-EN-P—November 2001
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CENTERLINE Motor Control Centers Bulletin 2100 Smoke Detector Unit
Figure 3 Unit wiring diagram
Publication 2100-IN046B-EN-P—November 2001
Publication 2100-IN046B-EN-P—November 2001
Supercedes Publication 2100-5.8—April 1999
© 2001 Rockwell Automation. All rights reserved. Printed in USA.
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