ProStel



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Installation Manual

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ProStel Manual

The RM ProStel has carefully been brought together from quality components and has been designed with performance in mind.

Using our many years of involvement within the hot water industry and out knowledge of bringing unvented cylinders to the market we have created a new stanard in unvented water storage.



ProStel Specification


The following outlines the standard specification:

  • Minimum recommended working pressure 1 bar.
  • Maximum working pressure 15 bar.
  • All cylinder connections are 22mm compression.
  • Units tested to 15 bar.
  • Minimum water supply 1.5 bar, 20 litres/min.
  • Primary coil circuit must be pumped.

ProStel Advantages


ProStel has the following advantages:

  • 25 Year vessel guarantee.
  • Cylinder components guaranteed for 2 years.
  • Available in a range of styles sizes 150 to 300 litres.
  • Coil in coil high effeciency coil - high recovery rates.
  • External expansion for reliability and flexible siting.
  • Full Kiwa Approval.



    Technical Specification
  • ProStel Performance
    Weight Empty Weight Full (kg) Full Cold Capacity (l) Reheat Indirect Total Minutes Reheat 3kW Immersion Minutes EN12897 Heat Exchange kW Dedicated Solar Volume Litres Standing Loss Cylinder kWh/Day
    150L Direct 33 183 150 - 134 - - 1.41
    150L Indirect 38 186 148 17.2 106 18.55 - 1.41
    180L Direct 38 218 180 - 164 - - 1.53
    180L Indirect 42 220 178 20.4 136 18.55 - 1.53
    210L Direct 41 251 210 - 203 - - 1.8
    210L Indirect 45 253 208 22 167 18.55 - 1.8
    250L Direct 46 296 250 - 248 - - 2.15
    250L Indirect 51 299 248 25 213 22 - 2.15
    300L Direct 55 355 300 - 323 - - 2.28
    300L Indirect 60 357 297 34 285 22 - 2.28
  • Cylinder Kit Contents

    Direct Stelflow Kit Listing

    Product 150L 180L 210L 250L 300L
    Cold Water Inlet Set 1 1 1 1 1
    15x22mm Tundish 1 1 1 1 1
    T&P Reflief Valve 1 1 1 1 1
    Expansion Vessel 12L 12L 18L 18L 24L
    Exp. Vessel Bracket 1 1 1 1 1
    Expansion Vessel Hose 1 1 1 1 1
    Immersion Heater 2 2 2 2 2
    2 Port Zone Valve 0 0 0 0 0
    Dual Thermostat 0 0 0 0 0
    Energy Cut Out Stat 0 0 0 0 0
    Plastic Grommet 0 0 0 0 0
    Wiring Center 0 0 0 0 0
    Instruction Manual 1 1 1 1 1

    Indirect Stelflow Kit Listing

    Product 150L 180L 210L 250L 300L
    Cold Water Inlet Set 1 1 1 1 1
    15x22mm Tundish 1 1 1 1 1
    T&P Reflief Valve 1 1 1 1 1
    Expansion Vessel 12L 12L 18L 18L 24L
    Exp. Vessel Bracket 1 1 1 1 1
    Expansion Vessel Hose 1 1 1 1 1
    Immersion Heater 1 1 1 2 2
    2 Port Zone Valve 1 1 1 1 1
    Dual Thermostat 1 1 1 1 1
    Energy Cut Out Stat 0 0 0 0 0
    Plastic Grommet 0 0 0 0 0
    Wiring Center 1 1 1 1 1
    Instruction Manual 1 1 1 1 1

    • Schematics
  • Direct Technical Drawing

    Code 150D 180D 210D 250D 300D
    Capacity 150L 180L 210L 250L 300L
    Height 1102(F) 1290(F) 1478(F) 1728(F) 2041(F)
    Diameter 545 545 545 545 545
    Cold Inlet 150(A) 180(A) 210(A) 250(A) 300(A)
    Immersion 1 242(B) 242(B) 242(B) 242(B) 242(B)
    Immersion 2 619(C) 719(C) 819(C) 959(C) 1109(C)
    Sec. Return - - 1009(D) 1259(D) 1509(D)
    T&P Valve 890(E) 1078(E) 1266(E) 1516(E) 1829(E)

  • Indirect Technical Drawing

    Code 150I 180I 210I 250I 300I
    Capacity 150L 180L 210L 250L 300L
    Height 1102(H) 1290(H) 1478(H) 1728(H) 2041(H)
    Diameter 545 545 545 545 545
    Cold Inlet 105(A) 105(A) 105(A) 105(A) 105(A)
    Bottom Coil 339(B) 374(B) 374(B) 374(B) 374(B)
    Immersion 1 379(C) 379(C) 414(C) 414(C) 414(C)
    Stat Pocket 394(D) 394(D) 474(D) 569(D) 669(D)
    Immersion 2 - - - 959(E) 1109(E)
    Sec. Return - - 1159(F) 1409(F) 1609(F)
    T&P Valve 890(G) 1078(G) 1266(G) 1516(G) 1829(G)