CEA 4001 - Maximum Temperature of Water Supply; Valves and Accessories; Suction Conditions

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Compartments for pumpsets shall be sprinkler-protected. Where the pump compartment is separate, it may
be impractical to provide sprinkler protection from the control valve sets in the premises. Sprinkler
protection
may be provided from the nearest accessible point on the downstream side of the outlet non-
return valve
of the pump via a subsidiary stop valve secured in the open position, together with a
water flow detector in accordance with EN 12259-5, to provide visible and audible indication of the
operation of the sprinklers. The alarm equipment shall be installed either at the control valves or at a
responsibly manned location such as a gatehouse.
A 15-mm nominal diameter drain and test valve shall be fitted downstream of the flow alarm to permit a
practical
test of the alarm system.
9.3.3 Temperature
The pump compartment shall be maintained at or above the following temperature:
4°C for electric motor driven pumps;
10°C for diesel engine driven pumps.
9.3.4 Ventilation
Pump compartments for diesel engine driven pumps shall be provided with adequate ventilation in
accordance
with the supplier's recommendations.
9.4 Maximum temperature of water supply
The water supply temperature shall not exceed 40°C. Where submersible pumps are utilised the water
temperature
shall not exceed 25°C, unless the suitability of the motor has been proven for temperatures up to
40°C.
9.5 Valves and accessories
A stop valve shall be fitted in the pump suction pipe and a non-return and a stop valve shall be fitted in
the delivery pipe. In lift condition, when the centre line of the pump is above the maximum water level, a
stop valve may be omitted.
Any taper pipe fitted to the pump outlet shall expand in the direction of flow at an angle not exceeding 20°.
Valves
on the delivery side shall be fitted after any taper pipe.
Means for venting all cavities of the pump casing shall be provided unless the pump is made self-venting by
arrangement
of its branches.
Arrangements shall be made to ensure a continuous flow of water through the pump sufficient to
prevent overheating when it is operating against a closed valve. This flow shall be taken into account in
the system hydraulic calculation and pump selection. The outlet shall be clearly visible and where there is
more than one pump the outlets shall be separate.
NOTE: Diesel engine cooling circuits usually use the same water. However, if additional water is used, it
shall
also be taken into account .
Tapings on the pumps for inlet and outlet pressure gauges shall be easily accessible.
9.6 Suction conditions