Honeywell VISTA-128BPT Installation And Setup Manual page 45

Use Table 5 to determine the required backup battery capacity and use Table 6 to determine the battery model number.
A dual battery harness is supplied that allows two batteries to be wired in parallel for increased capacity.
5. Using the total calculated from Table 4, calculate the battery capacity required for the installation.
Table 5: Battery Capacity Calculation Table
Capacity Formula
Standby For 4-hour standby time: Total standby current X 4 hours X 1.4
contingency factor.
Capacity
For 24-hour standby time: Total standby current X 24 hours X 1.1
contingency factor.
Alarm
For 4-, 5-, or 15-minute alarm time:
Capacity
Total alarm curr. X 0.067 (4 min) 0.250 (15 min)
Total Add standby and alarm capacities
Capacity
6. Use the Battery Selection Table to select the appropriate battery for the installation.
Table 6: Battery Selection Table
Capacity Recommended Battery
4AH Yuasa NP4-12
7AH Yuasa NP7-12
12AH Yuasa NP12-12
14AH Yuasa NP7-12
17.2AH Yuasa NPG18-12
The standby battery is automatically tested for 10 minutes every 4 hours, beginning 4 hours after exiting
Programming mode. In addition, entry into the Test mode initiates a battery test. The VISTA-128BPT/VISTA-
250BPT also runs a 5-second battery test every 60 seconds to check if the battery is connected.
7. Connect the battery, referring to Figure 3-23.
Section 3 – Installing the Control
Calculated Value
Comment
Fits in large mercantile cabinet only.
Connect two in parallel.
Fits in large mercantile cabinet only.
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