SPECIFICATIONS FOR FIRE HYDRANT & SPRINKLET SYSTEM.P3/6

1.17.3 Capacity.

The discharge and head of the jockey pump shall be as mentioned in Bill of Quantities.
Jockey pump shall be Horizontal /Vertical mono-block / coupled type. The pump casing
shall be of cast iron and parts like impeller, sleeve, wearing ring etc. shall be of noncorrosive
metal like bronze, brass or gunmetal. The shaft shall be of stainless steel.
Bearing of the pump shall be effectively sealed to prevent loss of lubricant or entry of the
dust or water. The pump casing shall be designed to withstand 1.5 time the working
pressure.

1.17.4 Motor.

The motor shall be squirrel cage A.C. induction type suitable for operation on 415 volts 3
phase 50 Hz, system. The motor shall be tatally enclosed fan cooled type confirming to
protection clause IP 21 of IS 4691. The class of insulation shal be B, synchronous speed
shall be 3000 RPM/1500 RPM. The motor shall conform IS 325-1978 and rated for
continuous duty.

1.17.5 Motor Starter.

The motor starter shall be automatic star delta type with overload trip, but without under
voltage / no volt trip. Starter shall conform to IS 1822-1967.

1.18 MAIN ELECTRIC FIRE PUMP.

1.18.1 Scope

This section covers the details of requirements of the motor, starter and pump for the
electrically operated firm pump.

1.18.2 General.

The electric fire pump shall be suitable for automatic operation complete with necessary
electric motor and automatic starting gear, suitable for operation on 415 volts, 3 phase,
50 Hz A/C system,. Both the motor and the pump shall be assembled on a common
base plate of fabricated MS channel type or cast iron type.

1.18.3 Drive

The pump shall be only direct driven by means of a flexible coupling. Coupling guard
shall also be provided.

1.18.4 Fire Pump (Electrical)

The fire pump shall be horizontal end suction centrifugal type. It shall have a capacity to
deliver 2280 LPM as specified, developing adequate head so as to ensure a minimum
pressure of 3 kg. per sq.cm at the highest and the farthest outlet. The delivery pressure
at pump outlet shall be not less than 6 kg. per sq.cm. in any case.
The pump shall be capable of giving a discharge of not less that 150 percent of the rated
discharge, at a head of not less than 65 percent of the rated head. The shut off head
shall be within 120 percent of rate head.
The pump casing shall be of cast iron to grade FG 200 to IS:210 and parts like impeller,
shaft sleeve, wearing ring etc. shall be of non-corrosive metal like bronze / brass /
gunmetal. This shaft shall be of stainless steel.
Bearing of the pump shall be effectively sealed to prevent loss of lubricant or entry of
dust or water.
The pump shall be provided with a plat indicating the suction lift delivery head, discharge
speed and number of stages. The pump casing shall be designed to withstand 1.5 times
the working pressure.

1.18.5 Motor

The motor shall be squirrel cage A/C induction type suitable for operation on 415 volts 3
phase 50 Hz system. The motor shall be totally enclosed fan cooled type conforming to
protection clause IP 21 vide IS-4691.The class of insulation shall be B. The motor shall
be rated to continuous duty as per relevant IS and shall have a horsepower rating
necessary to drive the pump at 150 percent of its rated discharge.

1.18.6 Motor Starter.

The motor starter shall be automatic star Delta type conforming to IS:1822-1967. The
starter shall not incorporate under voltage or overload trip or single-phase preventor.
The starter assembly shall be suitably integrated in the power control panel for the wet
riser system.
Each pump shall be provided with vibration isolating pads of appropriate size.

1.19 DIESEL FIRE PUMP.

1.19.1 Scope

This section covers the details or requirements of the stand by fire pump operated by a
diesel engine.

1.19.2 General

The diesel pump set shall be suitable for automatic operation complete with necessary
automatic starting gear, for starting on wet battery system and shall be complete with all
accessories. Both engine and pump shall be assembled on a common bed place,
fabricated with mild steel channel.

1.19.3 Drive

The pump shall be only direct driven by means of a flexible coupling. Coupling guard
shall also be provided. The speed shall be 1500/1800 RPM.

1.19.4 Fire Pump (Diesel)

The fire pump shall be horizontal split casing centrifugal type. It shall have the capacity
to deliver 2280 LPM as specified. Developing adequate head so as to ensure a minimum
pressure of 3 kg. per sq.cm. at the highest and the farthest outlet. The delivery pressure
at the pump outlet shall be not less than 7 kg per sq.cm. in any case. The pump shall be
capable of giving a discharge of not less than 150% of the rated discharge at a head of
not less than 65% of the rated head. The shut off head shall be within 120% of the rated
head. The shaft shall be of stainless steel. The pump shall be provided with mechanical
seal. The pump casing shall be designed to withstand 1.5 times the working pressure.
Bearing of pump shall be effectively sealed to prevent loss of lubricant or entry of dust or
water.

1.19.5 Diesel Engine

Engine Rating :-

The engine shall be cold starting type without the necessity of preliminary heating of the
engine cylinders or combustion chamber (for example, by wicks, cartridge, heater plugs
etc.) The engine shall be multi cylinder /vertical, 4-stroke cycle, water-cooled, diesel
engine, developing suitable HP at the operating speed specified to drive the fire pump,
Continuous capacity available for the load shall be exclusive of the power requirement
of auxiliaries of the diesel engine, and after correction for altitude, ambient, temperature
and humidity for the specified environmental conditions. This shall be at least 20%
greater than the maximum UP required to drive the pump at its duty point. It shall also be
capable of driving the pump at 150% of the rated discharge at 65% of the rated head.
The engine shall be capable for continuous non-stop operation for 8 hours. The engine
shall have 10% overload capacity for one hour in any period of 12 hours continuous run.
The engine shall accept full load within 15 seconds from the receipt of signal to start.
The diesel engine shall conform ton B.S. 649/IS 160/IS 10002, all amended up to date.

1.19.6 Cooling System.

The engine cooling system shall be radiator water cooled system. The radiator
assembly shall be mounted on the common base plate. The radiator fan shall be driven
by the engine as its auxiliary with a multiple fan belt. When half the belt brake remaining
belts must be capable of driving the fan. Cooling water shall be circulated by means of
an auxiliary pump of suitable capacity driven by the engine in a closed circuit.

1.19.7 Fuel System.

The fuel shall be gravity fed from the engine fuel tank to the engine driven pump. The
engine fuel tank shall be mounted either over or adjacent to the engine itself suitably wall
mounted on brackets. The fuel filter shall be suitably located to permit easy servicing.
The engine fuel tank shall be welded steel construction (3mm thick) and of capacity
sufficient to make the engine to run on full load for at least 8 hours. The tank shall be
complete with necessary supports, level indicator (protected against mechanical injury),
inlet, outlet, over flow connections drain plug and piping to the engine fuel tank. The
outlet should be so located as to avoid entry of any sediment into the fuel line of the
engine. A semi rotary hand pump filling the engine fuel tank together with hose pipe 5
mtr. Long with a foot-valve etc. shall also form part of the scope of work.

1.19.8 Lubricating Oil System.

Forced feed Lubricating Oil system shall be employed for positive lubrication. Necessary
Lubricating Oil filters shall be provided and located suitably for convenient servicing.

1.19.9 Starting System.

The starting system shall comprise of necessary battery / batteries, starter motor of
adequate capacity and axle type gear to match with the toothed ring fly wheel. Suitable
metallic relay to protect starting motor from excessively long cranking runs shall be
included within the scope of the work. The metallic relay protection shall be integrated
with engine protection system.
The capacity of the battery shall be suitable for meeting the needs of the starting
system but not less than 180 AH.
The battery capacity shall be adequate for 10 consecutive starts without recharging
with cold engine under full compression.
The scope shall cover all cabling, terminals, initial charging etc.

1.19.10 Exhaust System.

The exhaust system shall be complete with silencer suitable for indoor installation,
and silencer piping including bends and accessories needed. The exhaust pipe shall
protrude outside the pump room. The total backpressure shall not exceed
the engine manufacturer’s recommendations. The exhaust piping shall be suitably
supported and the pipe used shall be of medium class MS pipe.

1.19.11 Engine Shut Down Mechanism.

This shall be manually operated and shall return automatically to the starting position
after use.

1.19.12 Governing System.

The engine shall be provided with an adjustable governor to control the engine
speed with 5% of its rated under all conditions of load up to full load. The governor
shall be set to maintain rated pump speed at maximum pump load.

1.19.13 Engine Instrumentation.

Engine instrumentation shall include the following :
a) Lubricating Oil Pressure Gauge.
b) Lubricating Oil temperature gauge
c) Water temperature gauge.
d) Water pressure gauge
e) Tachometer
f) Hour meter
g) Starting key
The instrument panel shall be suitably mounted on the engine.