GE Security 1501, Installation And Operation Manual

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ESL 1500 Series Fire Alarm Control Panel
Alarm Initiating Devices
This section describes how to field wire initiating devices such as smoke detectors, pull stations, and heat detectors. Refer to
Figure 5 for Class A (Style D) and Figure 6 for Class B (Style B) wiring.
Two-Wire Smoke Detectors, Heat Detectors, and Manual Pull Stations
•
Connect only two-wire smoke detectors UL Listed as compatible to the 1500 Series Fire Control Panel. Refer to the
list of compatible detectors in Appendix A.
•
Two-wire detectors receive their power direct from the zone terminals and transmit the alarm signal via the same wires. Be
certain to observe polarity when installing detectors.
•
All initiating devices must be wired sequentially for proper supervision with the end-of-line resistor (2.7K Ohm 1/2 W)
installed after the last device. ESL has detectors available with EOL built in.
Four-Wire Smoke Detectors
•
Four-wire detector power is shared with indicating circuits; do not exceed total power requirements of 1.5 Amps.
•
Always supervise four-wire detector power with an end-of-line power supervisory device (ESL model 204-12/24V) after
the last unit.
See Figure 5 for Class A (Style D) wiring and Figure 6 for Class B (Style B) connection to the panel.
Do not overlook adequate lightning protection. Lightning damage commonly occurs from three sources:
1. Through alarm loop wiring
2. Through AC power inputs
3. Through earth ground or power ground connections
The 1500 System has substantial lightning protection incorporated in all three areas. However, proper lightning protection for AC
power must be accomplished where the wire enters the building. Arrestor circuitry and earth grounding should be in accordance
with Article 250 of the National Electrical Code.
There is no known protective device available which is capable of protecting equipment from damage caused by “direct hit”
strikes of lightning due to the extremely high energy released (10 million to 100 million volts @ 10,000 to 30,000 amps).
However, line surges from indirect strikes can be minimized.
Additional protection is suggested in areas subject to above-average lightning activity or induced voltage spikes and fluctuations
due to power line load switching.
Field Wiring Checkout Procedures
Note
: Make sure that AC and battery power are disconnected before proceeding.
1. Test all field wiring before connecting any equipment.
A. Make sure no unwanted voltages are present on circuit conductors and ground. They are a hazard and may prevent
proper system operation.
B. All wiring except those intentionally and permanently grounded must be tested for isolation from ground using an
insulation testing device such as a “Megger”.
Note:
Caution must be exercised when using voltage generating test instruments such as a “Megger”. Damage
to equipment could result if the equipment is connected (wired) during wiring tests.
C. All wiring, other than those intentionally connected together, must be tested for conductor-to-conductor
isolation using an insulation testing device.
2. With each circuit pair short-circuited at the end of the circuit, measure circuit resistance with an ohmeter. Record the circuit
resistance of each circuit and store this data with the control panel. Loop resistance must be less than 100 ohms on
initiating zones.
3. Perform testing as described previously after any addition, deletion, or mechanical or electrical damage to the system
has occurred.
4. A periodic test should be performed in accordance with the schedules recommended in NFPA 72, Chapter 7, or more
frequently, if required by the authority having jurisdiction. Whenever possible a 100 percent test should be performed.
When less than a 100 percent test is performed, a record must be maintained of the devices tested each time, so different
devices are tested in subsequent tests.