Hiper II Main Features

  • Integral flushing and bypass filter valve
  • Test ports
  • UFH slab drying cycle
  • Frost protection function
  • PWM pump speed control
  • Pressure differential and flow control PICV with fast stepper actuator
  • Integral shock arrestor for cold water supply
  • 3 strainers - one for each circuit
  • Filling group for heating circuit

Functional and safety features

  • Start up menu for commissioning
  • Set time and date
  • Heating flow limitation setting
  • Programmable return temperature limitation control
  • Manual pump operation
  • Room thermostat normally OPEN or CLOSED option
  • Additional switch for adding a second pump to load a cylinder or for use as an alarm
  • Optional programme to add a temperature controlled hot water storage cylinder
  • Programmable anti-legionella cycle for hot water storage cylinder
  • “Keep warm” function by time or temperature, programmable or switch off options
  • Select plate heat exchanger for “keep warm” function to limit scale formation
  • Select “heating” or “hot water only” operation of the HIU

Functional and commissioning features

  • Start up menu for commissioning
  • Set time and date
  • Heating flow limitation setting
  • Programmable return temperature limitation control
  • Manual pump operation
  • Room thermostat normally OPEN or CLOSED option
  • Additional switch for adding a second pump to load a cylinder or for use as an alarm
  • Optional programme to add a temperature controlled hot water storage cylinder
  • Programmable anti-legionella cycle for hot water storage cylinder
  • “Keep warm” function by time or temperature, programmable or switch off options
  • Select plate heat exchanger for “keep warm” function to limit scale formation
  • Select “heating” or “hot water only” operation of the HIU

Optimised Heating Function
The controller is monitoring the secondary return temperature and as the temperature in the area surrounding the room thermostat nears the set point, the controller will then start to lower the secondary flow setpoint temperature. This function is aimed at UFH situations where temperature over-shoot in rooms is a particular problem.

Pump protection - to prevent pump ‘seizing’ during long shut down periods in the summer months. A timed programme is available to run the pump at regular intervals. The periods can be adjusted at time of commissioning if desired.

Power Loss Shut down - the controller retains enough residual power to shut down the control valve on loss of power to prevent wasted heat and prevent possibility of scalding with uncontrolled high DHW temperatures.

Shut down if control is lost due to failure of the control valve for high temperature safety.

Pressure Independent Control valve
PICV cartridge is built into the inlet block. Fast acting stepper motor, dual speed PID control allows one application valve. DPCV can be employed externally if required where differential pressures exceed 4kPa. Combines an externally adjustable automatic balancing valve, a differential pressure control valve and a full authority modulating control valve.

Filling Group with removable pipe
Wras approved and with double check valve for back flow protection.

Keep warm function
Temperature controlled to maintain heat within the DHW plate heat exchanger. Function starts at a pre-set time of non-use which is programmable between 5 minutes and 24 hours, the function also has an ON or OFF setting.

General specification

Control method Electronic PID controller with fast acting stepper / PICV.
Plate Heat Exchangers Stainless steel—insulated Wras approved
Expansion Vessel 8 Ltr
Casing Fully insulated steel backplate and cover
Dimensions 585mm H x 465mm W x 265mm D
Heat meter Various (dependent upon order specification)
Filters 1) Primary 2) Htg 3) CW inlet 800 micron
Wras approved shock arrester Mechanical spring loaded
Internal pipework Copper

Technical Specification

DH maximum pressure 16 bar
DH maximum temperature 85° C
DH maximum flow (through the PICV) 1330 L/hr
DHW maximum output with ∆T 45°C - DH at 85°C with 1120 ltrs/hr primary flow Max 82kW
DHW maximum output with ∆T 45°C - DH at 85°C with 1190 ltrs/hr primary low Max 90kW
DH maximum pressure differential (as dictated by the PICV) 4 bar
HTG maximum working pressure 2.5 bar
HTG safety valve setting 3 bar
HTG maximum temperature 75° C
HTG - radiators temperature adjustment 30°C to 75°C
UFH - underfloor heating temperature adjustment 20°C to 50°C
HTG maximum output (85°C at 1330 ltrs/hr) 29kW
HTG minimum output 1kW
Heating pump nominal head capacity 70 kPa
DHW temperature adjustment 45°C to 65°C
DHW side maximum pressure 10 bar
Minimum suggested inlet pressure for cold water supply 1.5 bar
Electrical supply 1 ph 50Hz 230v
Average flow measured by BESA for 8 hour period of keep warm 4.5 Ltrs / hr
HIU installation weight, no cover. 25.4 kg
HIU weight - Gross, incl. packaging 32.5 kg

Abbreviations - DH (district heating side) HTG (secondary heating side UFH (underfloor heating) DHW (domestic hot water)

Insulation

Fully insulated cabinet including the backplate

Insulation Properties - FT7 724 FR NP Low Density Open Cell Polyether Polyurethane

  • Flexible low density open cell polyether polyurethane foam containing a flame retardant additive to reduce ease of ignition.
  • Black Dual-Melt 25- 30 micron Polyurethane film on one surface.
  • Thermal conductivity 0.033W/mk
  • Density BS EN 845:1995: 24±3 Kgs/m3

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