NFS2-3030/E Installation Manual — P/N 52544:N1 07/18/2014
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Battery Checks and Maintenance
Testing the System
Zero Ohms to ground will cause a ground fault.
On systems equipped with a firefighter’s telephone circuit, make a call from a telephone circuit
and confirm a ring indication. Answer the call and confirm communication with the incoming
caller. End the call and repeat for each telephone circuit in the system.
Remove AC power, activate an Initiating Device Circuit through an alarm initiating device or
an addressable initiating device on the SLC, and check that programmed active notification
appliances sound, and alarm indicators illuminate. Measure the battery voltage with
notification appliances active. Replace any battery with a terminal voltage less than 21.6 VDC
and reapply AC Power.
Return all circuits to their pretest condition.
Check that all status LEDs are off and the green POWER LED is on.
Notify fire, central station and/or building personnel when you finish testing the system.
5.4 Battery Checks and Maintenance
Maintenance-free sealed lead-acid batteries used in the system do not require the addition of water
or electrolyte. These batteries are charged and maintained in a fully charged state by the main
power supply's float charger during normal system operation. A discharged battery typically
reaches the float voltage of 27.6 VDC within 48 hours.
Follow the local AHJ and manufacturer recommendations for battery replacement intervals.
Minimal replacement battery capacity appears on the control panel marking label. Immediately
replace a leaking or damaged battery. You can get replacement batteries from the manufacturer.
•
If a battery leaks and contact is made with the Sulfuric Acid, immediately flush skin and/or
eyes with water for at least 15 minutes. Water and household baking soda provides a good
neutralizing solution for Sulfuric Acid.
•
If Sulfuric Acid gets into eyes, seek immediate medical attention.
•
Ensure proper handling of the battery to prevent short circuits.
•
Take care to avoid accidental shorting of the leads from uninsulated work benches, tools,
bracelets, rings, and coins.
NOTE:
The battery test requires fully charged batteries. If batteries are new or discharged due
to a recent power outage, allow the batteries to charge for 48 hours before testing.
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SLC Out
SLC Return
SLC Return
SLC Out
STEP 2
STEP 3
Step 1. Disconnect the SLC channel B (Out) and SLC channel A (Return) at the control panel.
Step 2. Measure and record the resistance at SLC Out.
Step 3. Measure and record the resistance at SLC Return.
The minimum resistance is the lesser of two and three.
Figure 5.1 Measuring DC Resistance on an Unpopulated SLC Loop
!
WARNING: BATTERIES CONTAIN SULFURIC ACID,
WHICH CAN CAUSE SEVERE BURNS TO THE SKIN AND EYES AND DAMAGE TO FABRICS.
