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c. Hose reels should be sited in prominent and accessible positions at each floorlevel adjacent to exits in corridors on exit routes, in such way that the nozzle if thehose can be taken into every room and within 6 m of each part of a room, havingregard to any obstruction. Where heavy furniture or equipment may be introducedinto a room, the hose and nozzle should be capable additionally of directing jet intothe back of any recess formed.

d. In exceptional circumstances consideration may also be needed as to thedesirability of sitting hose reels in such way that if a fire prevents access to one hosereel site, the fire can be attacked from another hose reel in the vicinity.

11. Installation Of Hose Reels:

a. Hose Reel In Recesses. Preferably hose reels should install in recesses sothat they do not from obstructions on a route of escape. The details of installation willvary considerably owing to be wide variation of types of hose reel and their size. Atypical example of an installation a fixed hose reel is illustrated.

b. Recess Doors. Any doors provided for hose reel recesses should be sohinged that they open approximately 180 so as not to offer any obstruction to the

hose being run out in either direction. The doors should not normally be fitted withlooks.

c. Hose Reels In Open Areas. When installed on open floor areas it may benecessary to position hose reel above head height, but in these cases the nozzleretainer, the hose guide and the inlet valve should be fitted at about 900mm abovefloor level. It may also be desirable to provide an anti-over-run device to prevent thehose from becoming entangled when run out.

d. Importance of Firm Fixing. Hose reel brackets should firmly fixed to thewall so that casual knocks received during normal use of the building and thestresses incurred during use for fire-fighting will not prevent the unimpeded use of thehose reel.

12. Coordinating Spaces for Hose Reels:

a. The space required for most types of hose reel and recommendationsconcerning their location in relation to floor or ground level are indicated in hose reelspecification. Spaces for horizontal hose reels are not given as these areconsidered special installation.

b. The definitions of thedifferent types of hose reel andthe maximum overall size if eachare given in BS 5274.

Hose Reel

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NOTE 1 : HOSE REEL CONFORMING TO BS 5274.NOTE 2 : FOR SIZE OF SPACES AND HEIGHT ABOVE FLOOR LEVEL REFER BS

5247.

13. Water Supply for Hose Reels. Minimum requirement. As a minimum, thewater supply to hose reels should be such that when the two top-most reels in a building arein use simultaneously, each will provide a jet of approximately 6 m in length and will delivernot less than 0.5 liters/s (30 liters/min). For example, when a length of 30 m of hose reeltubing (type 1 of BS 3169) is in use with a 6.35mm nozzle, a minimum static pressure of1.25 bar will be required at the entry to each reel and with a 4.8 mm nozzle, a minimumstatic pressure of 3 bar will be required.

1 bar = 10 N/m = 100 kPa. 15 lb/sq in (14.7 psi)

14. Booster Pumps:

a. Where the water pressure in hose reel mains need to be boosted, theprovision of an electrically driven pump is usually a confided method. A duplicate

standby pump should also be provided. It shall be a diesel pump with anickel/cadmium battery supplied for starting.

b. Both motors and pumps should be sited in fire protected positions and theelectrical supply to them should be by an exclusive circuit with the cables following aroute of negligible fire risk or be provided with adequate protection.

c. The booster pumps system should come into operation automatically on adrop in pressure or a flow of water. Both pumps should be automatically primed at alltimes. Pressure gauges are employed to sand any pressure dropped for bothpumps.

d. All pumps should also be capable of being started or stopped manually. Thestandby pump should be so arranged that it will operate automatically on a failure for

any reason of the duty pump. The NIC/Cad battery rechargeable shall withstand 6scissile starts with minimum capacity of 75 AH in 5 hours rate of discharge.

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e. An audible and visual alarm should be provided at an agreed position toindicate that the equipment and the pumping plant have operated, especially to warnof manual stop.

f. Connection for Boosted Supplies. Some water undertakings do not permit

a booster pump to be connected direly into a supply main. In such cases theinstallation should be fed from a section tank or inter-connected tanks having a

minimum capacity of 1.125 liters. The tank or tank should be automatically suppliedfrom a towns main, controlled by a valve of minimum diameter 50mm.

g. Use of Domestic Water Tanks. Tanks supplying water for domestic purposeshould not be used as suction tanks for hose these domestic supplies to be drawn offin such a manner that the requisite resave of water for the hose reel installation isalways preserved.

15. Hose Reel Notices. For hose reel which do not have automatic action a noticeshould be provided indicating the need to turn on the inlet valve before running out the hose.This notice should be affixed to the wall in a prominent position adjacent to the reel.

16. Switching Procedures. On both the Duty Pump and Diesel Pump panels, the modestarts switches shall be at AUTO position always and current input available as indicated.

17. On normal condition with the NEB or LLN (TEN) electrical supplies available, theelectrical pump will be in used. In case of electricity not available than the standby dieselpump will come into action. The standby pump is started by the Nickel/Cadmium batterywith a capacity of 75 AH with a discharge rate of 5 hr and capable of 6 successive abortivestart of the pump.

18. The electrical pump will be switch on and off automatically with sensing of pressuredrop by a pressure sensor gauge. It can be switch on and off manually too depending onthe mode switch.

19. The diesel pump with the mode switch set to AUTO will only switch the pumpautomatically with the drop in pressure as sensed by the sensor but cannot be switch offautomatically. (A requirement under the Fire Officer Committee to ensure safetyoperations). It can only be switched off manually. Thus, to ensure the diesel pump operatesefficiently, daily servicing is required to ensure:

a. Diesel fuel top up.

b. Engine oil top up.

c. Battery in serviceable condition.

d. All wirings is good condition.

e. Starting-up and stopping can be easily executed by daily running up of thepump for at least 10 minutes.

f. Water level in the tank.

g. Running up to be carried out in both auto function and manual.

20. Time Delay and Sensor. The sensors are adjusted to a certain requirement eachdifferently to the electrical and diesel pumps. Adjustment being carried out on the timerrelays and delay cells. This timer and delay relays are not normally adjusted after initialinstallation as per manufacturers specification. What ever it is all adjustment must followclosely to the specifications given.

21. Whatever the mode of switching, the moment either pump is run up an alarm bell (6)will be sounded or a buzzer. This has two factors:

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a. To inform and indicate that operation of the pumps.

b. To ensure that whenever the pumps are no longer required, especially thediesel pump because of its particular requirement and wire up be manually switchedoff to prevent burning of pump.

c. This wiring and indication will be linked to the master control panel inoperation with whole fire detection system.

22. In the latest set up, water level micro switches wire up with the pumps starting circuitis also installed. This feature will inhibit both pumps from operation when the water level inthe Hose Reel System water tank falls below a set level. This is to ensure that both pumpswill not burnt out should there be no water, and pump keep running especially so in the caseof diesel pump.