| HIPER II DHW ONLY Single Plate HIU with Ista Heat Meter | HIPER2SPSW80IS |
| HIPER II DHW ONLY Single Plate HIU without Heat Meter | HIPER2SPSW80 |
The Hiper II V4 HW only heat interface has a single plate heat exchanger that produces only hot water (DHWS). Using the same design and components as the well-established twin plate version but without the secondary heating output. This HIU would be used in commercial applications where only hot water services are required, or some domestic applications where electric heating is installed. The large surface area heat exchanger can give a wide range of outputs depending on the heat and flow available from the heat network supplying these HIUs.
Variable system conditions present challenges that the Hiper HIU PID control system meets by providing stability and rapid reaction to changes in supply and demand. The PICV (control valve) regulation delivers the design flow rate without affecting the modulating travel of the valve, so full authority is available throughout the full scope of the modulation. It is controlled by the electronic PID controller with constant monitoring from temperature and flow sensors at all critical flow and return paths. Key is control of the DHW demand, even at low flow, and still maintaining low return temperatures.
A proportional–integral–derivative controller (PID) continuously calculates an error value as the difference between a set point and a measured process variable and applies a correction based on the ‘proportional, integral and derivative’ values. In practical terms it automatically applies accurate and responsive correction to a control function, much like cruise control on a car. The PID algorithm maintains the set point without delay or overshoot, by controlling the stepper motor of the PICV actuator.
| Indirect interface for instantaneous DHW | Hiper II V4 Hot Water ONLY |
| Control method | Electronic PID controller with fast acting stepper / PICV |
| Plate Heat Exchangers | Stainless steel—insulated Wras approved |
| Casing | Fully insulated steel backplate and cover |
| Heat meter options | Zenner C5 MID compliant 1.5 qp M3/hr 110mm |
| Filters 1) Primary 2) CW inlet | 800 micron |
| Wras approved shock arrester | Inta - mechanical spring loaded |
| Wras approved shock arrester | copper |
| DH maximum pressure | 16 Bar |
| DH maximum temperature (Recommended operating 80°C) | 85°C |
| DH maximum pressure differential | 4 Bar |
| DHW temperature adjustment | 30°C - 65°C |
| DHW maximum output at 1300 ltrs/hr with 80°C DH and ∆T 40°C | Max 80kW |
| DHW minimum output at 400 ltrs/hr with 55°C DH and ∆T 40°C | Min 15 kW |
| DHW maximum flow at 1300 ltrs/hr with 80°C DH and ∆T 40°C | 28.5 Ltrs/min |
| DHW maximum flow at 1300 ltrs/hr with 55°C DH and ∆T 40°C | 5.8 Ltrs/min |
| DHW maximum output at 1300 ltrs /hr with 70°C DH ∆T 45°C | 63kW Minimum |
| Suggested inlet pressure for cold water supply | 1.5 Bar |
| Electrical supply | 1ph 50Hz 230v |
For installations where the landlord of the properties has fitted a metering system that enables a scheme where the tenant pays for heat by prepayment, the HIU has the capability to shut down the supply of heat when payment agreements have not been met. The HIU Controller has an auxiliary connection terminal that facilitates this option.
To connect to a prepayment billing system simply go into the installer setting and turn ‘ON’ Prepayment function, and connect the billing system cable to the connection in the controller.
The controller shuts down the PICV completely and also cancels out keep warm function to prevent ‘credit minus’ on billing.
The HIU needs no other valves to shut down when the billing is out of credit, saving cost on purchase of a motorised valve capable of closing against pressure differentials in the system and installation time.
The billing system working in conjunction with the heat meter selected by the consultant or energy provider, is usually volt free, but if is 230 volt signal then an accessory relay box is available. Consult the billing provider for this information.
In the BESA test without insulation on any part of the HIU, the average heat load measured on the primary side was 42W. Insulation of the casing, backplate and PHE is now standard on our production HIU and substantially lower heat load figures will be announced subject to independent testing. Why is the figure so low without insulation? Because using hydro blocks and the Hiper design reduces pipework to a bare minimum.
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
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