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Summary
Instantaneous hydraulic interface units.
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Application
Suitable for commercial applications.
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Description
The Baxi AquaHeat HI/HWI (Heating Indirect/Hot Water Indirect) provides a high-performance solution for meeting apartment heating and hot water needs for homes supplied by a heat network. The Baxi AquaHeat HD/HWI (Heating Direct/Hot Water Indirect) provides an alternative highly efficient, low cost solution.
Features and benefits:
- Multiple outputs - range of heating outputs from 4 kW to 60 kW and domestic hot water outputs from 18 kW to 57 kW.
- Easy installation - optional first fix rail with in-built filling loop and stand-off bracket to allow for installation with various primary and tertiary pipework. Pre-wired with heat meter and Mercurius remote monitoring module.
- Highly efficient - ultra-fast acting, fully modulating PICV perfectly matches energy supply to instantaneous demand and high performance insulation providing very low heat losses.
- Remote monitoring and control - mercurius platform for remote monitoring to reduce site on time and giving visibility of errors to improve first-time fix rates.
- Reliable - Water Regulation WRAS and Reg4 approved. BESA 2023 V3 compliant in preparation for HNTAS market regulation.
- Covered with a five year parts and labour warranty.
- BESA 2023 V3 accredited - high performing Indirect HIU with eight best practice passes. The first BESA 2023 certified Direct HIU with best practice Heat Loss performance.
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Product certifications
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Digital objects
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Color
Black, Grey
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Material
Expanded polypropylene (EPP)
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Shape
Rectangle
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Length
260 mm, 250 mm
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Width
540 mm, 300 mm
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Height
750 mm, 544 mm
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Warranty description
Five year
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SKU Code
7867470
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Specification
Classification data
Type
HI/ HWI – indirect heating with instantaneous hot water.
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Standards
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Thermal performance
Tested to BESA Technical Standard for UK HIU Test Regime.
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Third-party certification
WRAS Water Regulation 4-certified.
BESA certificate of registration.
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HIU duty
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Space heating
Refer to equipment schedules.
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Domestic hot water
Refer to equipment schedules.
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Space heating supply temperature
15-85°C.
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Space heating return temperature
15-85°C.
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Space heating flow rate
0.26 m³/hr.
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Hot water supply temperature
40–65℃.
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Volume-weighted average return temperature (VWART)
26.1°C (70°C DH temperature).
29.9°C (55°C DH temperature).
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Standing losses
0.95 kWh/day (70°C DH temperature).
0.91 kWh/day (55°C DH temperature).
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Network duty
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Network flow temperature
Refer to equipment schedules.
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Network return temperature
Refer to equipment schedules.
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Network flow rate
0.9 m³/hr (DHW mode).
0.26 m³/hr (space heating mode).
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Network pressure drop (maximum)
16 kPa.
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Network pressure differential (maximum)
600 kPa.
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Hydraulic components
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Domestic hot water control valve
PICV.
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Space heating control valve
PICV.
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Domestic hot water heat exchanger
Asymmetric plate heat exchanger.
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Space heating heat exchanger
Asymmetric plate heat exchanger.
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Space heating circulation pump
Auto space heating pump.
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Controls and metering
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HIU controller
MODBus interface for remote monitoring.
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Meter
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Meter type
Axioma Qalcosonic E3 Heat Meter., No heat meter.
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Meter display location
Front-facing – within HIU casing.
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Communication protocol
M-Bus., Wireless M-Bus.
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Prepayment shut-off valve
Integrated within HIU.
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Electrical supply
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Rated operational current
5 A.
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Rated operational voltage
230 V a.c. at 50 Hz single-phase.
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Accessories
Not required., First Fix Rail including flushing bypass and filling loop HI/HWI Series - 7867480., First Fix Rail including flushing bypass and filling loop for use withstand-off bracket HI/HWI Series - 7867485., Stand-off frame - 7867482., Secondary L-pipes for use withstand-off frame - 7867483., Primary L-pipes for use with stand-off frame - 7867484.
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Insulation
Expanded polypropylene (EPP).
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Sustainability data
Contains Red List materials
No
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Country of product manufacture
United Kingdom
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Manufacturing plant location
Preston, UK
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Material
Expanded polypropylene (EPP)
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Expected Life
20 year
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