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UPod keeps it flexible

A series of underground plant room made by KGN Pillinger have received Water Regulations Advisory Scheme (WRAS) approval. And no wonder.

KGN Pillinger has received WRAS approval for its UPod series of Underground Plant Rooms.

The UPod underground tank and pumping systems are supplied completely packaged suitable for installations below ground level making them ideal for situations where floor space is at a premium. The watertight GRP underground tank housing is provided with a secure access hatch and frame and is fully building services equipped.

The WRAS-approved versions of the UPod are available from 1,100-9,600l actual storage tank capacity, and 280-1,100l capacity tanks available with WRAS approval will be announced shortly.

The fully fitted UPod allows for the flexibility of a 1-4 pump packaged booster set that can be designed for either Duty / Assist or Duty / Standby utilising variable speed WRc-approved multistage pumps.

"The WRAS-approved versions of the UPod are available from 1,100-9,600l
tank capacity"

The control centre has an auto duty sequence changeover of pumps and incorporates thermostatic fan control, external lighting supply, phase failure relay, sump pump starter and alarm. In the event of incoming supply valve failure an overflow electrode activated relay sends a signal to a solenoid valve shutting down the supply to the storage tank and the booster set continues to operate until the low level electrode shuts the pumps off.

The solenoid valve will also close should a high level occurrence be detected within the tank.

An external wall mounted remote Mimic Control Panel with battery backed alarm is supplied for installation above ground to enable monitoring and signal any failures.

The Slow Fill option is an electronic surge protection device, offered to help alleviate any hydraulic shock problems that may occur due to high pressure surges entering the riser and/or system pipe-work and causing water hammer within the system, which may result in the fracturing of the pipes and fittings.

Problems are normally encountered when starting the pumps on an empty system or one where the pressure has fallen to minimum, due to mains power or water supply failure.

Upon start up the pump(s) will rapidly ramp up to full speed in an attempt to meet the required system pressure as quick as possible.

To overcome this problem an additional delay timer and the ‘Second Set Point’ connections on the Hydrovar variable speed drive units are utilised.

Upon restoration of mains power supply or an acceptable level of water has now become available within a previously depleted break tank the ‘Slow Fill’ system will become enabled, and the second set point value of the Hydrovar will be requested.

The Hydrovars will operate the pumps to achieve the reduced set point programmed into the drive, for a pre-set time period, allowing the system to fill without creating any excessive hydraulic shock within the system.

After the time period has elapsed, the ‘Slow Fill’ system will disable the second set point and enable the drive to operate to meet the required system set point programmed into the Hydrovar, and the speed of the pump to vary to match the constantly changing demand of the system whilst maintaining the required system pressure.

Topic: Pumps & Pumping Systems
Tags: valves , tanks , pumps

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