Chapter 2. Installation/System Checkout
2-17
Testing Circuit Supervision
Use the following procedures to confirm that IDNet and
NACs and are supervising for opens, shorts and grounds.
The right column in this table shows the LEDs that illumi-
nate when an open, short, or ground occurs on a specific cir-
cuit.
Replacing Lithium Battery
The panel uses a lithium battery to maintain non-volatile
memory on the panel. In the event of a total power-down
(AC power and lead-acid battery), the lithium battery allows
the panel to maintain all historical logs, time/date informa-
tion, list of disabled points, and the alarm verification tallies.
Important Note: The lithium battery must be replaced only
by a qualified service technician.
Periodic Testing and Maintenance
The minimum requirements for periodic testing of the fire
alarm system are outlined in chapter 10 of NFPA-72, 2002
edition. Local codes may require additional testing and
maintenance. All system components must be tested in
accordance with governing codes. Specific details on select
system components are provided below.
Battery Tests
The batteries used with the 4008 FACP are sealed lead-acid
type. Batteries should be installed within six months of the
date of manufacture.
Batteries should be tested by discharging them with a suit-
able tester and verifying that battery voltage is at least 21V
when fully discharged. Battery discharge tests should be per-
formed annually, and batteries should be replaced no longer
than 4 years from date of installation.
The battery charger is temperature-compensated per battery
manufacturer recommendations. There is no charger voltage
adjustment. At normal room temperature, battery voltage
should be 27-27.6V when the battery set is fully charged. At
higher temperatures, the voltage will be lower. At lower
temperatures, the voltage will be higher. The battery charger
has a negative temperature coefficient. At higher tempera-
tures, the chemical process in the battery is accelerated. This
means that the ideal charger voltage is lower. Likewise, at
lower temperatures, a higher output voltage is required for
full charge. Control of battery charge voltage relative to
ambient temperature prolongs battery life. The chart below
shows the proper range of battery voltage across the speci-
fied operating range of the equipment. The chart is for 12-
cell battery sets, with nominal 24V rating.
Table 2-5 Testing Circuit Supervision
Condition Corresponding LEDs
To create an open:
Class A or B Circuit. Disconnect the
“out” wiring from any device.
Illuminates the System Trouble
LED.
To create a short:
Apply a zero ohm jumper across
the IDNet terminal blocks, or across
the loop +/- terminals on a device.
Illuminates the System Trouble
LED.
To create an Earth ground:
Place a 10K or smaller value resis-
tor from supervised wiring to Earth
ground.
Illuminates the System Trouble
LED.
If you have programmed a front
panel or annunciator LED to detect
Earth ground conditions, the pro-
grammed LED also illuminates.
Refer to “Common LED Applica-
tions” in Chapter 6 of this manual
for information on programming an
Earth Fault LED.
Table 2-6 Temperature Effect on Batteries
Temp
(C)
Temp
(F)
V/cell
(min)
V/cell
(max)
Min.
Battery
Voltage
Max.
Battery
Voltage
0 32 2.294 2.367 27.53 28.40
5 41 2.284 2.352 27.41 28.22
10 50 2.274 2.337 27.29 28.04
15 59 2.264 2.322 27.17 27.86
22.2 72 2.250 2.300 27.00 27.60
25 77 2.244 2.292 26.93 27.50
30 86 2.234 2.277 26.81 27.32
35 95 2.224 2.262 26.69 27.14
40 104 2.214 2.247 26.57 26.96
45 113 2.204 2.232 26.45 26.78
49 120.2 2.196 2.220 26.36 26.64
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