Viking VFR-400 Inactive Circuits, Battery Size Calculations, Operating Instructions Form

VFR-400 • 5403548 • REV D • 10/07

Inactive Circuits

All inactive initiating device circuits must have the end-of-line resistor on the panel terminal.

Operating Instructions Form

Fill in the name, address, and telephone number of the servicing agency on the appropriate instruction sheet. Frame and place this sheet adjacent to control panel at eye level.

Battery Size Calculations

To use Calculation Table:

1)List in column #1 all devices used in the system, include all modules, bells, horns, door holders, and smoke detectors (see table #1 or manufacturers specifications).

2)List in column #2 the quantity of each device.

3)List in column #3 the standby current of each device (exclude all signal indicating devices).

4)List in column #5 the alarm current of each device.

5)For each line, multiply the figure in column #2 by the figure in column #3 and enter the product in column #4. Then multiply the figure in column #2 by the figure in column #5 and enter the product in column #6.

6)Add the figures in columns #3 and #6, enter the sums in the appropriate Total mA box.

7)Convert these figures from milliamperes to amperes by multiplying by 0.001, enter the product in the appropriate Total A box.

8)Multiply the standby total amperes by required time in hours from table 2.

9)Divide the alarm total amperes by 12 (5 mins.).

10)Add the standby AH and the alarm AH and divide this sum by 0.85 (efficiency factor). Select a battery that has an AH rating above this figure but not less than 6.5AH.

Battery Size Requirements And Maintenance

Charging Voltage: 27VDC Nominal

Maximum Charging Current: .5A

These panels require a 24 volt sealed lead acid battery for proper operation. 24 hours of standby power is required for Local Systems and Central Station (NFPA-72).

The chart below will assist you in selecting the proper size battery: (Does not include LED Annunciator)

No. of Smoke	No. of Bells	Auxiliary Power	Standby Hours	Battery Size/Part No.
Detectors	(100mA each)	Requirements	Required	(2 Req.)
0-100	0-10	0-25mA	24	8AH/BT	80
0-100	0-10	0mA	90	12AH/BT	120
0-100	0-10	0-30mA	90	18AH/BT	180

Maximum allowed battery size for UL applications is 12AH. FM and others may require more than 24 hours of standby time and may use larger batteries. Batteries rated above 18AH require a separate battery cabinet (Potter Model BC-2). Mark the purchase date on the batteries. Test the batteries at least semi annually according to the battery test methods in NFPA72 or the battery manufacturers instructions. Replace the batteries if they either fail the test or after four years of use. The VFR-400 is capable of charging 24 AH batteries, (FM Applications only).

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