Heating and Ventilating

The MiniFlexx range consists of a single or twin pump set and break tank fully packaged on a common base plate. The pumps are of stainless steel construction and are each factory fitted with a variable speed drive to give a constant pressure. The control of the pumps is via a pressure transducer installed in the discharge manifold. The break tank is constructed from tough and durable WRAS approved materials and is fitted with a high quality WRAS approved high flow solenoid valve to ensure a rapid make up giving a constant water supply from the booster set. The break tank is designed to limit air ingress into the pumps due to water turbulence. 


MiniFlexx booster sets are available in either single or three phase incorporating pump run, low water and common fault volt free alarm contacts. All units incorporate high/low pressure alarm, dry run protection, auto change-over, fault history, protection against high/low voltage, over current, inverter overheat, communication error. 


For ease of use and set up the integral variable speed drives have a digital interface. The display shows the output frequency, actual pressure, pressure setting, output current, transducer error, high/low pressure, low water, drive error. 


Booster Set Selection 
Once the required pressure and flow rates are known then the decision as to the operation of the set and, therefore, the sizing of the pumps has to be made. The MiniFlexx booster set is available as a single or twin pump set. The twin pump sets are capable of operating duty/assist. It would seem the most cost effective option to select the pumps in duty/assist arrangement to each supply 50% of the required flow, however, the importance of ensuring a water supply must be considered. Some applications will require a standby pump capable of supplying the full duty if one of the pumps were to fail, this arrangement would be 'duty/ standby'. Option limiting factors may be the size of the pumps available with the MiniFlexx and also the electrical supply, therefore two pumps sized to operate duty/assist may be the only option. A real benefit of the MiniFlexx is that the unit will operate duty/assist regardless of whether the pumps are sized for duty/ assist or duty/standby. A further consideration for pump sizing is the flow capacity of the incoming water supply, although the MiniFlexx package includes an 85 litre nominal break tank the mains water supply needs to be adequately sized to keep up with the pump. 


Equipment Details 
Pumps 
Vertical or end suction stainless steel pumps. Three phase 2900 rpm motors. 


Mechanical seals 
Horizontal end suction pumps - Carbon/Ceramic 
Vertical multistage pumps - Carbon/Silicon 


Pump Control Vessel 
Suitable for 10 bar working pressure with E.P.D.M rubber diaphragm. 


Manifolds 
Grade 304 stainless steel. 


Power supply 
Single phase or three phase up to 2.2 kW 


Features of the MiniFlexx 
Small footprint 
Wall mounted or free standing 
Variable speed drives with digital display 
Built in dry run protection 
IP55 control panel complete with MCB’s 
All sets are fitted with individual isolating and non return valves to each pump 
Pump control vessel fitted as standard 
85 Litre break tank, type AF or AB air gap 
Type AF tank with factory fitted insulation 
High flow WRAS approved water inlet valve 
AV mounts 


Optional Additional Items 
Flexible pipe connectors 
Volt free fault contacts 
Wall mount kit 
Weatherproof housing (outside installation) 
Frost protection pack