Inactive Circuits, Battery Size Calculations

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).

VFR-400 specifications

The Viking VFR-400 is a light sport aircraft that has garnered attention for its innovative design and advanced technology. This aircraft is known for its versatility, performance, and safety features, making it a suitable choice for both recreational flying and pilot training.

One of the standout features of the VFR-400 is its efficient aircraft structure. Constructed primarily of high-strength composite materials, the VFR-400 boasts a lightweight yet durable frame. This not only enhances its aerodynamics but also contributes to increased fuel efficiency. The aircraft is powered by a reliable Rotax engine, which is well-regarded in the aviation community for its exceptional performance and low operational costs.

The VFR-400 is equipped with a low-wing design, which is optimized for stability and maneuverability. Pilots appreciate the responsive handling characteristics, which make it an enjoyable aircraft to fly, whether on short excursions or longer journeys. The spacious cabin design offers ample room for two occupants, ensuring comfort during flights. Large cockpit glass provides excellent visibility during takeoff and landing, critical times when situational awareness is paramount.

In terms of avionics, the VFR-400 features advanced electronic systems, including a modern glass cockpit display. This integration of technology provides pilots with real-time flight data, ensuring better navigation and situational awareness. Moreover, the aircraft often comes equipped with autopilot features, enhancing the flying experience, especially on longer flights.

Safety is a key aspect of the VFR-400 design. It incorporates redundant control systems, advanced braking systems, and robust structural integrity to withstand various in-flight scenarios. The landing gear is designed for easy maintenance and reliability, allowing for smooth landings on various surface types.

The VFR-400 is designed with fuel efficiency in mind, allowing for longer flight durations while keeping operational costs low. Its impressive range and payload capacity make it a highly flexible option for different mission profiles, from pilot training to leisurely flights.

Overall, the Viking VFR-400 exemplifies the spirit of modern aviation with its combination of performance, safety, and comfort. It stands out in the light sport aircraft category for its thoughtful engineering and commitment to delivering a quality flying experience. Whether for a seasoned aviator or someone new to flying, the VFR-400 offers a compelling platform for exploration and adventure in the skies.

VFR-400 • 5403548 • REV D • 10/07