Stuart

Stuart Pressurisation Unit SPU 280 MAXI

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Digital Pressurisation Unit

Suitable for maintaining pressure in large domestic and commercial sealed heating systems, chilled water systems, refrigeration units and industrial cooling systems. Stuart SPU Maxi units are exceptionally easy to install and commission and are housed in a compact and robust enclosure suitable for floor mounting.

Key Features
  • Suitable for sealed systems of up to 300,000 litres
  • Twin (Duty-Standby) pump option
  • 8.0 bar cold fill pressure
Technical Specification
Product Code 46726
General
Guarantee 2 years
Approvals CE
Features
Sealed system capacity Up to 300,000 litres
Mounting Floor mount
Pump control system
Intelligent control interface
System fill mode
Dry run protection
Typical noise 70 dB(A)
Materials
Break tank Polyethylene
Enclosure Powder coated steel
Performance
Maximum fill pressure 8.0 bar / 800 kPa
Maximum flow 18 l/min
Maximum inlet pressure - tank fill valve 7 bar / 700 kPa
Maximum working pressure 10 bar
Ambient air temperature Min 4 oC / Max 40 oC
Relative humidity 95 % non-condensing
Min./Max. water temperature Min 4 oC / Max 23 oC
Water tank
Usable water capacity 18 litres
Inlet valve and fill rate Float valve   12 l/min
Fluid category CAT 5 (type AB air gap with weir)
Connections
Cold water inlet G ½ M
Cold water outlet G ½ M
Overflow G ¾ (19 - 23 mm diameter pipe compression fitting)
Pump
Number of pumps 2
Pump mode Duty-standby
Pump type Peripheral
Motor type Induction, auto-reset thermal trip
Duty rating Continuous (S1)
Pump head and impeller Brass
Electrical
Power supply (Vac/Ph/Hz) 230 V a.c. / 1 / 50 Hz
Power consumption - P1 600 Watts
Current - full load 3.4 Amps
Fuse rating 5 Amps
Alarm output Multiple
Physical
Enclosure protection IPX2
Width 477 mm
Depth 324 mm
Height 780 mm
Weight - including fittings 45 Kg
Weight - filled 63 Kg
GTIN 13 DIGIT 5050400467267
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