Cylinders and solar water heaters for heat pumps
With a heat exchanger of large capacity and cross-section, for a heat pump. With one or two heat exchangers, from 200 to 750 litres.
- XL coilAlong about 80% of the tank.
- 55°C flowWorks well with low heat pump temperatures.
- Fewer cyclesQuick recovery, lower consumption.
- Built as oneLess electrolysis, a free flange.
- Selective collectorFull-plate aluminium-titanium absorber, copper risers.
- 3.5kw elementA third source, on electricity.
Sun and heat pump, in one cylinder.
The Mastersol HP is a closed-circuit solar water heater designed to connect to a heat pump. Inside the tank is a very long coil heat exchanger, along about 80% of the tank, that works well even with a flow temperature of about 55°C. The water heats up quickly, with good stratification and fewer heat pump cycles.
The coil is made of 2mm DC tube, enamelled to DIN 4753-3, with a large cross-section, which the heat pump needs to run properly. Because tank and exchanger are built as one, there is less of the electrolysis that add-on exchangers of other materials cause, and the flange stays free for servicing and replacing the anode.
The tank has Bayer Duro Glass enamel fired at 850°C, a magnesium anode, a jacket for the solar closed circuit, which withstands −47°C, and a 3.5kw electric element. The collector has a full-plate selective aluminium-titanium absorber, copper risers and 3.2mm tempered safety glass that stands up to hail and heavy rain.
Mastersol solar water heaters carry an A+ energy label and are CE and Solar Keymark certified.
What makes the difference
- Coil for the heat pumpThe coil runs along about 80% of the tank and has a large cross-section. It works well even with a flow of about 55°C, for quick hot water recovery and better stratification. Ideal for hybrid sun and heat pump systems.
- Closed-circuit jacketAround the tank, the jacket of the solar circuit is filled with antifreeze, for frost resistance down to −47°C. 2.5mm European steel, Bayer Duro Glass enamel fired at 850°C and 5cm of rigid polyurethane insulation.
- Full-plate absorberA 0.40mm selective aluminium-titanium sheet across the whole collector, on Ø22 & Ø8 copper risers. 3.2mm tempered safety glass that stands up to hail and heavy rain.
- One-piece aluminium frameA one-piece aluminium frame with a 1.25mm profile, a 0.5mm galvanised steel back and double 4cm mineral wool insulation. 100% neutral silicone.
- Closed circuit with antifreezeThe collector and the jacket are filled with antifreeze, so the system withstands frost down to −47°C. On top of the tank are the fill and vent points of the circuit and the seat of its safety valve (1.5-3 bar).
Models
Cylinders for heat pumps · BHP
All have enamel, a magnesium anode, 55 mm insulation and a 10 bar working pressure. The BHP1 models have one heat exchanger, the BHP2 models two.
| Model | Tank capacity | Heat exchangers | Heat exchanger surface | Heat exchanger volume | Tank height | Tank diameter | Net weight | Maximum working pressure | Maximum test pressure | Maximum heat exchanger pressure | Tank insulation |
|---|---|---|---|---|---|---|---|---|---|---|---|
| BHP1-200 | 200lt | 1 | 2.6 m² | 22.7lt | 1545 mm | 600 mm | 128 kg | 10 bar | 15 bar | 25 bar | 55mm polyurethane, 52 kg/m³ |
| BHP1-300 | 300lt | 1 | 3.6 m² | 31.5lt | 1620 mm | 630 mm | 154 kg | 10 bar | 15 bar | 25 bar | 55mm polyurethane, 52 kg/m³ |
| BHP1-500-1 | 500lt | 1 | 6.0 m² | – | 1800 mm | 800 mm | – | 10 bar | 15 bar | 25 bar | 55mm polyurethane, 52 kg/m³ |
| BHP1-750 | 750lt | 1 | 6.0 m² | – | 1800 mm | 800 mm | – | 10 bar | 15 bar | 25 bar | 55mm polyurethane, 52 kg/m³ |
| BHP2-200 | 200lt | 2 | 2.6 / 1.2 m² | 22.7lt | 1545 mm | 600 mm | 147 kg | 10 bar | – | 25 bar | – |
| BHP2-300 | 300lt | 2 | 3.6 / 2.2 m² | 31.5lt | 1620 mm | 630 mm | 192 kg | 10 bar | 15 bar | 25 bar | 55mm polyurethane, 52 kg/m³ |
| BHP2-500 | 500lt | 2 | 4.2 / 2.6 m² | 36.1lt | 1700 mm | 750 mm | 240 kg | 10 bar | 15 bar | 25 bar | 55mm polyurethane, 52 kg/m³ |
| BHP2-750 | 750lt | 2 | – | – | 1800 mm | 800 mm | – | 10 bar | 15 bar | 25 bar | 55mm polyurethane, 52 kg/m³ |
Cylinders for heat pumps · BLHP
All have Direct Glass enamel, 50 mm insulation with a leatherette cover, a thermometer, a magnesium anode and an 8 bar working pressure.
| Model | Tank capacity | Heat exchangers | Actual volume | Heat exchanger surface | Tank height | Tank diameter | Maximum working pressure | Maximum test pressure | Tank insulation | Hydraulic connections |
|---|---|---|---|---|---|---|---|---|---|---|
| BLHP-200 | 200lt | 1 | 170lt | 2.01 m² | 1240 mm | 600 mm | 8 bar | 10 bar | 50mm rigid polyurethane, 44 kg/m³, leatherette cover | Domestic water 3/4″ · coil 1″ · recirculation 3/4″ |
| BL2HP-200 | 200lt | 2 | 171lt | top 0.63 m² · bottom 1.27 m² | 1240 mm | 600 mm | 8 bar | 10 bar | 50mm rigid polyurethane, 44 kg/m³, leatherette cover | Domestic water 3/4″ · coil 1″ · recirculation 3/4″ |
| BL2HP-300 | 300lt | 2 | 262lt | top 1.27 m² · bottom 1.69 m² | 1240 mm | 700 mm | 8 bar | 10 bar | 50mm rigid polyurethane, 44 kg/m³, leatherette cover | Domestic water 1″ · coil 1″ · recirculation 1″ |
| BL2HP-500 | 500lt | 2 | – | 4.02 m² (total) | 2080 mm | 700 mm | – | – | 50mm polyurethane, leatherette cover | Domestic water 1″ · coil 1″ · recirculation 1″ |
Solar water heaters for heat pumps · HP
All models have a heat pump coil, selective collectors and a 3.5kw element. The litres and the collector area change.
| Model | Tank · collectors | Collector dimensions | Tank length | Tank diameter | Jacket capacity | Tank weight | Collector weight |
|---|---|---|---|---|---|---|---|
| HP-150-2 | 150 lt · 2.0 m² | 1 collector, 2.0 × 1.0 m | 128cm | 50cm | 8 lt | 55kg | 34.3kg |
| HP-150-25 | 150 lt · 2.5 m² | 1 collector, 2.0 × 1.25 m | 128cm | 50cm | 8 lt | 55kg | 41kg |
| HP-150-3 | 150 lt · 3.0 m² | 2 collectors, 1.5 × 1.0 m | 128cm | 50cm | 8 lt | 55kg | 2 × 26kg |
| HP-200-27 | 200 lt · 2.75 m² | 1 collector | 128cm | 58cm | 9 lt | 68kg | – |
| HP-200-3 | 200 lt · 3.0 m² | 2 collectors, 1.5 × 1.0 m · total width 2.12 m | 128cm | 58cm | 9 lt | 68kg | 2 × 26kg |
| HP-200-4 | 200 lt · 4.0 m² | 2 collectors, 2.0 × 1.0 m · total width 2.12 m | 128cm | 58cm | 9 lt | 68kg | 2 × 34.3kg |
| HP-300-4 | 300 lt · 4.0 m² | 2 collectors, 2.0 × 1.0 m | 178cm | 58cm | 18 lt | 100kg | 2 × 34.3kg |
| HP-300-5 | 300 lt · 5.0 m² | 2 collectors, 2.0 × 1.25 m | 178cm | 58cm | 18 lt | 100kg | 2 × 41kg |
| HP-300-55 | 300 lt · 5.5 m² | 2 collectors, 2.0 × 1.36 m · total width 2.84 m | 178cm | 58cm | 18 lt | 100kg | – |
Manufacturer’s data. Data sheets (PDF) and certificates on request.
Questions
Which size do I need?
Mastersol sizes its systems for a normal use of 40 litres of hot water at 40°C per person. As a guide: 1 person, 100 litres with 1.5 m² anywhere in Greece. 2 people, 120 litres with 2.0 m² (1.5 m² is enough in southern Greece). 3 people, 120 litres with 2.0 m², or 160 litres with 2.0 m² in northern Greece. 4 people, 160 litres with 2.5 m² (2.0 m² in the south). 5 people, 200 litres with 3 m², or 4 m² in northern Greece. If you are not sure, call us. The HP models come in 150, 200 and 300 litres.
Why a built-in coil instead of an add-on exchanger?
Because tank and coil are built as one, with a uniform surface. Add-on exchangers of different materials (copper or stainless steel) wear the anode out quickly through electrolysis and shorten the life of the tank. The flange also stays free for servicing and replacing the anode.
Does it withstand frost?
Yes. It runs on a closed circuit with antifreeze and withstands temperatures down to −47°C. The antifreeze is checked and topped up every year, depending on the area.
What warranty does it have?
5 years on the cylinder, serviced every 2 years. 10 years if you also fit an overheat valve (94°C / 6 bar), a 10 bar closed expansion vessel and a closed-circuit expansion vessel, with a yearly service. 15 years on the collectors and 1 year on the electrical parts. The warranty covers parts, not labour or transport.
What servicing does it need?
Every 2 years the magnesium anode rod and the safety valves are replaced, or every year for the 10-year warranty. Every year the antifreeze is checked and topped up. The technician signs the warranty form and gives you a service receipt.
Prices and availability for distributors
Send us your company details and the models you are interested in.