Bosch D1255RB Manual de usuario descargar pdf (Pagina 28)

| Approved Applications Compliance Guide | 8.0 NFPA 72 Fire Alarm Applications

28 Bosch Security Systems, Inc. | 3/12 | F01U266055-01

8.6 Household Fire Warning Equipment

The Household Fire Warning Equipment Standard requires 24 h of standby current plus 4 min of alarm

operation at the end of the 24-hour period. Use battery Ah calculations to confirm compliance. The

formula in Table 12 includes the calculation for 4 min of alarm operation at the end of the 24-hour

period, and a 10% contingency factor that allows for depletion of battery capacity with age.

Because of changing regulations, verify the necessary time with your local AHJ (authority

having jurisdiction).

Table 12: Household Fire Ah Calculation Formula

Total B

Hours Total C

Alarm Operation

Contingency Total Ah

(_______ x 24) + ( ________ x 0.067) + 10% = _________

1 Refer to Table 7 on page 24.

2 Value = Minutes of alarm operation

3 Total Ah requirements must not exceed the Ah capacity of batteries:

One D126 Battery = 7 Ah

Two D126 Batteries = 14 Ah

One D1218 Battery = 17.2 or 18 Ah

Two D1218 Batteries = 34.4 or 36 Ah

8.7 UL 609 (D9412GV4/D7412GV4/D7212GV4)

The leads providing operating power to the alarm sounding device shall be electrically and

mechanically protected as required in the Standard for Installation and Classification of Mercantile

and Bank Burglar-Alarm Systems, UL 681, or the circuit shall be constructed so that the system is not

defeated by cutting or short-circuiting connections between the control unit and the alarm housing.

The alarm housing for a bank alarm system without a remote alarm transmission connection shall be

mounted on the outside of the building, visible from a public street or highway. It shall be accessible

for examination and repair. It shall also be located not more than four stories above the street level

unless:

 A second alarm sounding device and housing, intended for outside service [see 3.3(a)], is

mounted adjacent to the premises or area of the building in which the alarm system is installed

 A second alarm sounding device, intended for inside service [see 3.3(b)], is mounted within the

premises.

In either case, the outside alarm sounding device and housing may be mounted as high as the seventh

floor.

8.8 UL 365 (D9412GV4/D7412GV4/D7212GV4)

In a mercantile burglar alarm system, a mercantile alarm sounding device located within a building but

outside the protected area, is acceptable, provided it is rated for outside service and alarm conditions

are transmitted to:

a. The dispatch location of the law enforcement agency having jurisdiction over the protected

property or

b. A central station or residential monitoring station complying with the Standard for Central-Station

Alarm Services, UL 827.

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Bosch D1255RB Manual de usuario Pagina 28

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