Section 3 - Installing the Control
3-29
The total control panel standby load must be
limited to 919mA for 24-hour standb
time usin
two 12V, 17.2AH batteries connected the Power
supply. If you are using a Commercial Fire
Listed 24VDC Power Supply use the worksheet
supplied with the power suppl
to determine the
correct battery size.
Determining the Size of the Standby
Battery
For burglary installations requiring 4-hour standby
time followed by 15-minutes alarm time, use a 12AH
battery to support all loads up to and including the
maximum system load (e.g., 1.3A standby/2.8A alarm
total control panel load). For fire installations requiring
24-hour standby time, use the worksheet below to
calculate the required battery capacity.
!
DO NOT use Gates batteries (sealed lead-acid
type). These batteries require a different
charging voltage than is supplied by the panel.
Use Worksheet 7 to determine the required backup
battery capacity and use The Battery Selection Table to
determine the battery model number. A dual battery
harness is supplied that allows two batteries to be
wired in parallel for increased capacity.
Using the total calculated from Worksheet 6, calculate
the battery capacity required for the installation.
Worksheet 7: Battery Capacity Calculation Worksheet
Capacity Formula
Calculated
Value
Standby
Capacity
Total standby current X 24 hours
X 1.1 contingency factor.
Alarm
Capacity
Total alarm curr. X 0.083 (5 min)
or X 0.250 (15 min)
Total
Capacity
Add standby and alarm
capacities
Use the Battery Selection Table to select the
appropriate battery for the installation.
Battery Selection Table
Capacity Recommended Battery Comment
4AH Yuasa NP4-12
7AH Yuasa NP7-12
12AH Yuasa NP12-12 Fits in large
mercantile
cabinet only.
14AH Yuasa NP7-12 Connect two
in parallel.
17.2AH Yuasa NPG18-12 Fits in large
mercantile
cabinet only.
Connect the battery, referring to Figure 3-25.
The standby battery is automatically tested for
10 minutes every 4 hours, beginning 4 hours
after exiting Programming mode. In addition,
entr
into the Test mode initiates a batter
test.
The VISTA-128FBPN also runs a 5-second
battery test every 60 seconds to check if the
battery is connected.
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