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McDonald STEELflow 300 Litre Indirect Unvented High Gain Cylinder (CCS300HP)

£1,019.08

Available on back-order

McDonald STEELflow 300 Litre Indirect Unvented High Gain Cylinder (CCS300HP)

The McDonald STEELflow Indirect Unvented Heat Pump Cylinder is manufactured from duplex stainless steel, and specifically designed for use with either air source or ground source heat pumps. It can also be used with gas system boilers using Priority Domestic Hot Water (PDHW).

These cylinders have a large corrugated high efficiency indirect heat exchanger to ensure optimal heat transfer at lower flow temperatures. The coil’s corrugated design provides high heat transfer and flow rates from the heat pump, with faster recovery times than plain coils due to the increased surface area.

Features:

  • High grade duplex stainless steel
  • 25 Year guarantee
  • Large corrugated indirect coil for maximum heat transfer
  • Post weld treatment for maximum durability
  • Low heat losses
  • High density foam insulation
  • Pressure loss on indirect heat pump coil less than 0.4 bar
  • Heat Pump Coil Rating (HWA 002:2020) – 19.22 kW
  • Coil Surface Area – 2.97 m2
  • Immersion Heater at bottom of cylinder – Great for PV Diverters to store excess energy!

All 300 Litre indirect units are supplied with:

  • 22mm Altecnic Inlet Combination Control Set
  • 24 Litre Zimlet Expansion Vessel with Fixing Kit
  • 28mm EPH 2 Port Motorised Zone Valve
  • Altecnic 1/2″ T&P Valve
  • 15 x 22mm Tundish
  • ESi High Limit Thermostat
  • Installation Manual

All Units to Following Specification:

  • 90 Degree Elbow on Hot Water Draw Off (22mm compression)
  • Secondary Return (22mm compression)
  • T&P Valve (1/2” Female)
  • Thermostat Pocket (1/2″ & NTC Pocket)
  • Low Level Immersion Heater (1 3/4” Female)
  • Heat Pump Coil Flow / Return (1” BSP Female with 28mm Compression Adaptors)
  • Cold Feed (22mm compression)

 

Capacity (L) Height Cold Inlet Heating Flow Return Immersion Mid-Coil Pockets Secondary Return T&P Valve/High Limit Coil Surface Area (m2)
200 1405 180 865 250 190 465 1028 1189 2.97
250 1699 180 865 250 190 465 1340 1501 2.97
300 1924 180 865 250 190 465 1563 1724 2.97
Capacity (L) Weight Empty (kg) Weight Full (kg) Standing Heat Loss (kWh/24h) Standing Heat Loss (W) ErP Energy Rating Heat Pump Coil Rating (kW) Heat Pump Coil Rating (kW) Reheat Time (mins) Reheat Time (mins) –
200 47 236 1.70 71 C 31.50 21.21 14.66 21.12
250 51 280 1.99 83 C 33.08 20.33 17.71 26.68
300 55 331 2.26 94 C 35.44 19.22 21.53 33.63

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