Wessex ModuMax mk3 floor standing boiler
Stainless steel high efficiency, fully modulating condensing pre-mix floor standing boiler.
Available in 5 modules with outputs (@80/60°C) of 97, 116, 147, 196 and 254kW. Individual boiler modules can be stacked one, two or three high in 15 combinations up to 762kW output.
Product information
- Fully modulating boiler which benefits from lower fuel usage and closer load matching.
- Space-saving stacked modular boiler delivering 762kW in less than a square metre footprint.
- Flexibility in system design with differential temperature (delta T) up to 40°C. Suited to district heating schemes, the lower flow rates associated with wider differential temperature allow smaller diameter pipes and smaller pumps that can lower capital cost and also reduce energy consumption.
- Compensate for distribution losses in large heating systems with max 90°C flow temperature.
- 10 bar maximum working pressure allows installation in basement for high rise buildings.
- Stainless steel heat exchanger backed up by with a 10-year warranty, making the Wessex ModuMax mk3 an extremely robust boiler.
- High relative velocity within the waterways help to reduce the opportunity for sedimentation.
- Low water content, rapid response, with minimal standing losses.
- Built in boiler sequence controls capable of controlling up to 16 boiler modules and hot water circuits.
- Low environmental impact - NOx <40mg/kWh for maximum BREEAM credits.
- Easy access to plant room as the lightweight and compact Wessex ModuMax mk3 fits through a standard doorway and can split into modules for limited access or rooftop plant rooms, as well as packaged plant rooms.
- Buy in confidence from a UK manufacturer with decades of commercial heating and hot water expertise.
- Back up and support from our team of experienced engineers across the UK.
- Extensive boiler spare parts service available direct from the manufacturer.
- BIM objects available to assist in design and management.
Technical data
| Units | 97/97H | |
|---|---|---|
| No. of modules | 1 | |
| Energy | ||
| Building regulations Part L seasonal efficiency | % gross | 94.9 |
| BS EN 15502 seasonal efficiency | % gross | 95.2 |
| Boiler output 80/60°C, NG & LPG | kW | 95.7 |
| Boiler output 50/30°C, NG & LPG | kW | 97.2 |
| Boiler input (gross) - maximum, NG | kW | 109 |
| Boiler input (gross) - maximum, LPG | kW | 106.7 |
| Boiler input (net) - maximum, NG & LPG | kW | 98.2 |
| Boiler output - minimum 80/60°C, NG & LPG | kW | 19.1 |
| Water | ||
| Water content | litres | 16 |
| System design flow rate @ 40°C ∆T rise | l/s | 0.6 |
| Water side pressure loss @ 40°C ∆T rise | mbar | 5 |
| System design flow rate @ 30°C ∆T rise | l/s | 0.8 |
| Water side pressure loss @ 30°C ∆T rise | mbar | 9 |
| System design flow rate @ 20°C ∆T rise | l/s | 1.2 |
| Water side pressure loss @ 20°C ∆T rise | mbar | 20 |
| System design flow rate @ 11°C ∆T rise | l/s | 2.2 |
| Water side pressure loss @ 11°C ∆T rise | mbar | 61 |
| Maximum water pressure | barg | 10 |
| Maximum flow temperature setting | °C | 90 |
| Gas | ||
| Gas flow rate, NG (G20) - maximum | m3/hr | 10.4 |
| Gas flow rate, LPG (G31) - maximum | m3/hr | 4 |
| Nominal inlet pressure, NG (LPG) - maximum | mbar | 20 (37) |
| Maximum gas inlet pressure NG (LPG) | mbar | 25 (45) |
| Flue | ||
| Approx. flue gas volume @ 15°C, 8.75-9.25% CO2 | m³/hr | 143 |
| Maximum flue gas temperature @ 80/60°C | °C | 83 |
| Pressure at boiler flue connection | Pa mbar | 150 1.5 |
| NOx emission (0% excess oxygen, dry air free) - NG | mg/kWh | 39.8 |
| NOx emission (0% excess oxygen, dry air free) - LPG | mg/kWh | 42 |
| Connection | ||
| Water flow/return connections | inches | G1½" male |
| Gas inlet connection pipe thread size | inches | R1" male |
| Nominal flue diameter (I/D) | mm | 100 |
| Condensate trap connection(s) (O/D) | mm | 32 |
| Electrics | ||
| Electrical supply | 230 V 1 Ph 50 Hz | |
| Power consumption - maximum boiler modulation | W | 166 |
| Start current (per module) | Amp | 1.2 |
| Run current (per module) | Amp | 0.72 |
| Approx shipping weight | kg | 180 |
| Noise emission @1m @maximum modulation | Max dB (A) | 60 |
| Noise emission @1m @minimum modulation | Min dB (A) | 47 |
Downloads
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Wessex ModuMax mk3 boiler brochureProduct brochures 6125 kb |
Download |
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500001305-B QAA73.210 Programmable Room Unit Guide.pdfInstallers guides 1783 kb |
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Volt Free Contact (VFC) and switch fitting instructionsInstallers guides 1349 kb |
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Wessex ModuMax mk3 Installers GuideInstallers guides 6887 kb |
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FAQ
Ideal uses/applications
- Energy centres within district heating schemes and larger premises.
- Housing developments and flats using district heating networks.
- Hybrid systems alongside combined heat and power (CHP) and/or other renewable technologies such as biomass boilers.
- Easy fit replacement for refurbishment projects.
- Roof top and basement plantrooms.
- Packaged plantrooms.
- New build projects.
- Large commercial and public buildings including schools, hospitals and hotels.
- Medium sized commercial and public buildings including schools, hospitals, offices and hotels.
- Small industrial and manufacturing premises.
- Locations with substantial and continuous heating load including hospitals, care homes and hotels.
Optional extras
- Pipework kits to match the boiler model for ease of installation on site.
- Flues available through our flue partner Jeremias UK
- Choose from a wide range of service contracts to help maintain optimum performance.
- Book commissioning at the same time as placing your order for improved warranty terms.
Single Boiler Controls
- Outside air temperature sensor QAC34 (Part no. 533901457).
- Domestic Hot Water sensor kit (sensor and pocket) (Part no. 563605674).
- Mixing valve heating circuit control kit (clip in control module, temperature sensor and pocket) for 1 zone (Part no. 563605668).
- Mixing valve heating circuit control kit (clip in control module, temperature sensor and pocket) for 2 zones (Part no. 563605669).
- Mixing valve heating circuit control kit (clip in control module, temperature sensor and pocket) for 3 zones – Note: cannot be used in conjunction with volt free contact kit (Part no. 563605670).
- Programmable room sensor QAA75 (Part no. 533901587).
- Offset adjustable room sensor QAA55 (Part no. 533901589).
Multiple Boiler Controls
- Outside air temperature sensor QAC34 (Part no. 533901457).
- Volt free contact kit for remote status signalling AGU2.550A109 (Part no. 563605666).
- Heating circuit sensor kit (sensor and pocket) QAZ36 (Part no. 563605673).
- Merley boiler sequence controller, wall mounted (Part no. 563605672).
- Merley boiler sequence controller, loose kit for panel mounting (Part no. 563605671).
- LPB Bus communication module OCI345, one required per boiler module (Part no. 563605667).
- Programmable room sensor QAA75 (Part no. 533901587).
Often bought with
Case studies
Baglioni Hotel
Sector: Hotel
Project: The luxury 5-star hotel was in need of a replacement for its old Wessex County boilers and turned to Hamworthy for a replacement. Together with JCS and Midtherm Engineering, Hamworthy delivered a space-saving solution for the tight hotel plant room.
Building: Hotel plant room refurbishment
Application: Space heating 1,176kW, DHW
Learn more
St Paul's Cathedral, London
Sector: Historic building
Project: The prestigious cathedral on the top of Ludgate Hill benefits from modular boilers and high-performance calorifiers from Hamworthy Heating.
Building: Grade 1 listed refurbishment
Application: Space heating 1,016kW, domestic hot water 1,000L
Learn more
Welcombe Hotel
Sector: Hotel
Project: Danny Bulch from Cedar Green selected a variety of Hamworthy products to suit different applications at the Hallmark Welcombe Hotel.
Building: Hotel plant room refurbishment
Application: Space heating 540kW/588kW/154kW; DHW 2,149 L/h
Learn more
Langham Hotel, London
Sector: Hotel
Project: The prestigious Langham Hotel in London needed a high performance, lightweight hotel boiler for their rooftop plant room. See how Wessex ModuMax modular boilers provide the best solution.
Building: Hotel boiler plant room refurbishment
Application: Space heating 6,750kW, domestic hot water
Learn more
Stanmore Place, London
Sector: Residential and commercial, community heating
Project: This award-winning development chose Wessex ModuMax boilers to save space and match the requirements of their district heating network.
Building: Flagship development of apartments, houses and offices
Application: Space heating 7900kW, domestic hot water
Learn more
Danubius Hotel
Sector: Hotel and Leisure
Project: A busy hotel in London was looking for a boiler upgrade. Contractor SPIE UK worked with Hamworthy to find a hotel boiler that can deliver the working pressure required for the high-rise building.
Building: Hotel plant room refurbishment
Application: Space heating 3,048kW, DHW
Learn more