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Vaillant aroSTOR 200L Stainless Heat Pump Cylinder A+ ErP | 0010024440
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The Vaillant aroSTOR VWL B 200/5 UK (article no. 0010024440) is a self-contained, floor-standing heat pump hot water cylinder: a 200-litre stainless steel unvented cylinder with the heat pump built into the same column. It makes domestic hot water only, takes its heat from air, either from the room it stands in or through insulated 160 mm ducts to outside, and needs no outdoor unit, no refrigerant pipework on site and no boiler or heating connection. It only needs mains water, a 230 V supply and an air route.
It uses R290 natural refrigerant (GWP 3, 0.15 kg sealed charge) and reaches 60 °C on the heat pump alone, with a 1.2 kW titanium immersion element for boost, 65 °C and anti-legionella cycles. Efficiency is A+ (132 % ηWH) with a COP of 3.19 and about 775 kWh a year for the L load profile. The unvented kit (18 l expansion vessel, safety assembly and tundish) is supplied in the box, and the unit has PV and low-tariff control inputs.
This model offers compact footprint and a 1,458 mm height. The stainless steel tank has no sacrificial anode and carries a 5-year tank warranty. At over 50 kg it ships with a transport bag for a two-person carry.
A+
ErP energy class
COP 3.19
EN 16147 at A7
247 L
Mixed water at 40 °C
60 °C
Heat pump only
R290
GWP 3 refrigerant
5 years
Stainless tank warranty
Safety and regulatory
This is an unvented (mains pressure) cylinder. It must be installed and commissioned by a competent person to the Building Regulations (Part G3 in England and Wales), with the discharge pipework run through the supplied tundish to a safe, visible point. Complete the Benchmark commissioning checklist, which is needed to keep the guarantee. Electrical work must meet BS 7671: fit a permanent isolator with at least 3 mm contact gap (8 A) and 30 mA RCD protection, and do not switch the supply with an external timer. Installation involves no refrigerant work, but anything that opens the unit or touches the R290 circuit must be done by a person competent with flammable refrigerants. Fill the cylinder with water before switching on, or the heating coil is damaged and the guarantee is voided.
Compatibility and siting
Intended for domestic hot water; Vaillant classes direct commercial or industrial use as improper use. Install in a dry, frost-proof room, away from bedrooms because the unit transmits vibration to the floor and walls. Never connect it to internal extract ducts (bathroom, shower room or kitchen extractors). If it is ducted to outside (room-sealed), it must not be sited within 500 m of the coast. Keep the intake air free of solvents, sprays, chlorinated cleaners and dust. Air must be drawn within -7 °C to +45 °C; the heat pump can reach 60 °C up to 35 °C air, falling to 55 °C at 45 °C, and outside the range the element does the heating.
Key features
Heat pump and cylinder in one
Compressor, evaporator, fan and controller sit in the top of the cylinder column. There is no outdoor unit and no split pipework, so installation is plumbing, ducting and a plug-in style electrical connection.
R290 natural refrigerant
GWP 3, ODP 0, 0.15 kg in a sealed circuit. R290 lets the unit deliver 60 °C with no back-up heater while keeping a strong COP.
A+ efficiency
132 % water heating efficiency, COP 3.19 (EN 16147, A7, profile L) and 775 kWh a year annual consumption, a large saving over direct electric heating.
Stainless steel, low maintenance
Stainless steel tank with 50 mm polyurethane foam insulation, 1.61 kWh/24 h standing loss at 55 °C and no anode to replace. Five years on the tank, two on other components.
Titanium back-up element
1.2 kW titanium immersion heater for boost, up to 65 °C, and an anti-legionella cycle (60 to 70 °C, 1 to 99 day interval). Titanium resists limescale better than copper.
PV and tariff ready
PV mode with two levels (PV ECO up to 60 °C on the heat pump, PV MAX up to 65 °C with the element) and a low-tariff load-relief input, plus programmable time periods and a 43 °C minimum-temperature function.
How it gets its air
The unit has two 160 mm air connections (inlet and outlet). Choose the arrangement that suits the room; all three use the same unit.
Duct design
Use insulated ducts of 160 mm or larger to avoid condensation, and fit protective grilles or roof terminals on the openings. The maximum combined length of intake plus outlet (L1 + L2) is 10 m for flexible duct or 20 m for rigid duct, plus two 90° elbows. In rigid runs, each elbow, attachment or mesh adds pressure loss equal to about 5 m of straight duct, so count them. Allow 25 mm clearance around the unit and 300 mm at the top and front.
Heat-up and hot water output
Recovery times and usable volume
After first start-up, Vaillant states the heat pump needs 5 to 12 hours to reach 55 °C, depending on air and cold water temperature. A full re-heat at 7 °C air takes about 7 h 04 min (EN 16147). The unit delivers up to 247 litres of mixed hot water at 40 °C (V40, from the ErP data). It is designed to stay energised and re-heat on a programme rather than be switched off between uses.
Specification
Data note
The installation manual's technical-data table quotes lower EN 16147 figures (COP 2.99 for the 200 L, 3.00 for the 270 L) than Vaillant's UK technical leaflet and ErP data sheet. This page uses the leaflet and ErP figures, which match the A+ rating (132 % / 130 %). The manual and the leaflet also give different air temperature ranges: -7 to +45 °C in the manual and -7 to +35 °C in the leaflet. This page shows the manual's operating range together with the 35 °C limit for 60 °C hot water.
200 L or 270 L?
What is in the box
Supplied
The cylinder with its temperature and pressure relief valve fitted, the unvented kit (18 l expansion vessel, safety assembly with pressure reducer and expansion relief valve, tundish with retainer), a plug to seal the condensate overflow for blower door tests, the transport bag and the installation and operating instructions.
Not supplied
Air ducting and terminals, a drain valve for the lowest point of the cold supply, and a thermostatic mixing valve where one is needed to limit the outlet temperature. Pipework, cabling and the isolator are also by the installer.
Frequently asked questions
BTU & WATT Calculator
Room Dimensions
Room Type
Living Room
Bedroom
Kitchen
Bathroom
Conservatory
Hallway
Glazing Type
Single Glazed
Double Glazed
Triple Glazed
External Walls
0 Wall
1 Wall
2 Walls
3 Walls
4 Walls
Insulation Level
Poor
Average
Good (New Build)
Required Heating
0
Watts
0
BTUs
Documentation
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