ACV WaterMaster Evo 70–85kW Condensing Hot Water Heater

ACV WaterMaster Evo 70–85kW

The ACV WaterMaster Evo 70–85kW range is designed for installations requiring a high volume of domestic hot water with strong peak and continuous-flow performance. The range includes the WaterMaster 70 Evo and WaterMaster 85 Evo, offering maximum LCV heating inputs of approximately 69.9kW and 85.0kW respectively.

Both models use ACV’s proven Tank-in-Tank technology, stainless-steel domestic hot-water storage and condensing operation. They are designed for high-demand domestic hot-water applications across suitable residential, commercial and institutional installations.

High-Performance Domestic Hot Water

The WaterMaster Evo 70 and 85 are designed around high-volume domestic hot-water production rather than conventional small domestic boiler applications.

Each model provides approximately 315 litres of total tank capacity, consisting of a 125-litre primary circuit and 190-litre domestic hot-water tank.

This combination of stored hot water and high heating input allows the WaterMaster Evo to provide substantial peak and continuous hot-water output.

ACV specifies the following peak flow performance at 40°C:

• WaterMaster 70 Evo: up to 716 litres over 10 minutes
• WaterMaster 85 Evo: up to 783 litres over 10 minutes

Continuous flow at 40°C is specified at approximately:

• WaterMaster 70 Evo: 2,087 litres/hour
• WaterMaster 85 Evo: 2,534 litres/hour

Actual performance depends on incoming mains-water temperature, operating conditions, system design and the required outlet temperature. ACV’s published performance figures assume an incoming water temperature of 10°C.

ACV Tank-in-Tank Technology

A defining feature of the WaterMaster Evo is ACV’s Tank-in-Tank technology.

The domestic hot-water storage tank is positioned inside the primary heating tank. The domestic hot-water tank is manufactured from stainless steel and is surrounded by primary heating water, allowing heat to be transferred efficiently across the large available exchange surface.

The 70 Evo and 85 Evo each provide approximately 190 litres of domestic hot-water storage.

ACV also states that the stainless-steel domestic hot-water tank does not require anode protection, which can help simplify maintenance compared with systems that depend on conventional sacrificial anodes.

Condensing Gas Technology

The WaterMaster Evo operates as a condensing domestic hot-water heater.

ACV specifies DHW efficiency of 107.7% under the EN89 methodology for both the 70 Evo and 85 Evo. The manufacturer also specifies combustion efficiency of approximately 98.1% for the 70 Evo and 98% for the 85 Evo at maximum output.

The appliance incorporates a modulating air/gas premix burner and ACVMax controls to regulate operation according to demand.

WaterMaster 70 Evo

The ACV WaterMaster 70 Evo has a maximum heating input of approximately 69.9kW LCV and 77.6kW HCV.

ACV specifies:

• 315L total tank capacity
• 190L domestic hot-water capacity
• 125L primary capacity
• Up to 716L/10 minutes peak flow at 40°C
• Up to 2,087L/hour continuous flow at 40°C
• 2,455L first-hour flow at 40°C
• 1,391L first-hour flow at 60°C
• 107.7% EN89 DHW efficiency
• NOx Class 6
• A-rated water-heating energy efficiency
• Natural gas and LPG configurations
• ACVMax burner and controls

WaterMaster 85 Evo

The ACV WaterMaster 85 Evo provides a higher heating input for applications requiring additional hot-water recovery and flow capacity.

ACV specifies a maximum heating input of approximately 85.0kW LCV and 95.3kW HCV.

The 85 Evo provides:

• 315L total tank capacity
• 190L domestic hot-water capacity
• 125L primary capacity
• Up to 783L/10 minutes peak flow at 40°C
• Up to 2,534L/hour continuous flow at 40°C
• 2,895L first-hour flow at 40°C
• 1,638L first-hour flow at 60°C
• 107.7% EN89 DHW efficiency
• NOx Class 6
• A-rated water-heating energy efficiency
• Natural gas and LPG configurations
• ACVMax burner and controls

Stainless-Steel Construction

The WaterMaster Evo incorporates stainless-steel components including the domestic hot-water tank and heat exchanger.

ACV states that the stainless-steel heat exchanger is designed to reduce maintenance requirements and contribute to system lifespan.

The stainless-steel DHW tank also eliminates the requirement for anode protection according to ACV’s product information.

High-Demand Commercial Hot Water

The WaterMaster 70 Evo and 85 Evo are particularly relevant where domestic hot-water demand is substantially higher than that of a typical residential installation.

Potential applications include:

• Hotels and guest accommodation
• Restaurants and catering facilities
• Healthcare facilities
• Care homes
• Schools and educational buildings
• Sports and leisure facilities
• Multi-unit residential developments
• Large residential properties
• Commercial premises
• Industrial and institutional buildings

The correct model should always be selected following a proper hot-water demand calculation rather than simply choosing the larger output.

Cascade Installation

For larger hot-water requirements, ACV states that multiple WaterMaster Evo units can be installed in cascade.

Cascade configurations can increase overall hot-water production capacity and can provide additional operational flexibility or backup capacity.

This makes the WaterMaster Evo particularly suitable for larger commercial and institutional projects where a single appliance may not provide sufficient capacity.

Natural Gas and LPG

The WaterMaster Evo range is available in configurations for natural gas and LPG.

The exact fuel configuration, product reference, gas pressure and conversion requirements must be checked against the specific appliance being supplied.

ACV’s technical documentation provides separate combustion and gas-flow data for different gas configurations, so the exact model and fuel type should be confirmed before ordering.

ACVMax Controls

The WaterMaster Evo uses ACVMax controls together with a modulating premix gas burner.

The appliance also incorporates a high-efficiency circulator pump, temperature sensors, automatic air vent, gas valve and safety controls.

These components work together to control combustion and hot-water production according to operating demand.

Flue System

The WaterMaster 70 Evo and 85 Evo use a 100/150mm concentric flue connection.

ACV specifies a maximum concentric flue length of approximately 22 metres for both models under the manufacturer’s specified conditions. Actual permissible flue length depends on the installation configuration, bends, terminals and applicable installation requirements.

The flue design must therefore be calculated and installed according to the current ACV installation documentation.

Electrical Requirements

Both the WaterMaster 70 Evo and 85 Evo use:

• 230V electrical supply
• 50Hz frequency
• IP20 protection
• Single-phase electrical supply

ACV specifies maximum electrical consumption of approximately 220W for the 70 Evo and 230W for the 85 Evo.

Technical Specifications

Specifications are based on ACV’s published WaterMaster Evo documentation. Always verify the exact product revision, fuel configuration and installation requirements before ordering.

WaterMaster 70 Evo vs 85 Evo

The main difference between the two models is heating input and resulting hot-water performance.

The 70 Evo provides approximately 69.9kW LCV input and 2,087L/h continuous flow at 40°C.

The 85 Evo increases heating input to approximately 85kW LCV and continuous flow to approximately 2,534L/h at 40°C.

For installations with particularly high or rapidly varying hot-water demand, the 85 Evo may provide additional recovery and flow capacity. However, the correct selection should be based on a calculated domestic hot-water demand profile.

ACV WaterMaster Evo for European Supply

EuroFuelSupply supplies heating, hot-water and energy equipment to supported European markets for residential customers, installers, trade buyers, developers, retailers and wholesale customers.

When ordering an ACV WaterMaster Evo, confirm:

• Required model: 70 Evo or 85 Evo
• Fuel type
• Installation country
• Gas configuration
• Required flue arrangement
• Quantity
• Delivery location
• Any cascade requirements

For commercial developments or multiple-unit installations, request a quotation so the correct product configuration and availability can be confirmed.

Installation

The WaterMaster Evo is a gas-fired appliance and should be installed, commissioned and serviced by a suitably qualified professional.

The installation must comply with ACV’s current installation instructions and the regulations applicable in the country where the appliance is installed.

Flue sizing, gas supply, ventilation, condensate drainage, hydraulic connections, pressure requirements and safety devices should all be checked before installation.

Frequently Asked Questions

What is the ACV WaterMaster Evo 70–85kW?

The ACV WaterMaster Evo 70–85kW range consists of high-output condensing domestic hot-water heaters designed for high-demand residential, commercial and institutional applications.

What models are included in this range?

The range includes the WaterMaster 70 Evo and WaterMaster 85 Evo.

What is the output of the WaterMaster 70 Evo?

The WaterMaster 70 Evo has a maximum heating input of approximately 69.9kW LCV and 77.6kW HCV according to ACV’s technical data.

What is the output of the WaterMaster 85 Evo?

The WaterMaster 85 Evo has a maximum heating input of approximately 85.0kW LCV and 95.3kW HCV.

How much hot water can the WaterMaster Evo store?

Both the 70 Evo and 85 Evo have approximately 315 litres of total tank capacity, including a 190-litre domestic hot-water tank and 125-litre primary capacity.

What is Tank-in-Tank technology?

Tank-in-Tank technology places the domestic hot-water storage tank inside the primary heating tank. ACV uses this arrangement to provide a large heat-transfer surface and efficient domestic hot-water production.

Is the WaterMaster Evo a condensing water heater?

Yes. The WaterMaster 70 Evo and 85 Evo are condensing domestic hot-water heaters. ACV specifies EN89 DHW efficiency of 107.7% for both models.

What is the maximum hot-water flow of the 70 Evo?

At 40°C, ACV specifies a peak flow of up to 716 litres over 10 minutes and continuous flow of approximately 2,087 litres per hour, under the manufacturer’s stated test conditions.

What is the maximum hot-water flow of the 85 Evo?

At 40°C, ACV specifies a peak flow of up to 783 litres over 10 minutes and continuous flow of approximately 2,534 litres per hour.

Can the WaterMaster Evo operate on LPG?

Yes. ACV lists the WaterMaster Evo range as available in natural gas and LPG configurations. The exact fuel configuration must be confirmed for the model being supplied.

Is the ACV WaterMaster Evo suitable for commercial buildings?

Yes. Its high domestic hot-water capacity and flow performance make it suitable for a range of commercial and institutional applications, subject to correct system sizing.

Can WaterMaster Evo units be installed in cascade?

Yes. ACV states that multiple units can be grouped in cascade for larger applications or backup capacity.

Does the stainless-steel tank require an anode?

ACV states that the stainless-steel domestic hot-water tank does not require anode protection.

What flue connection does the WaterMaster 70/85 Evo use?

Both models use a 100/150mm concentric flue connection, with ACV specifying a maximum concentric flue length of approximately 22 metres under the stated conditions.

What electrical supply does it require?

The WaterMaster 70 Evo and 85 Evo use a 230V, 50Hz electrical supply.

Is the WaterMaster Evo suitable for a large house?

It can be suitable for a large residential property with high domestic hot-water demand, but the correct model should be selected based on a professional hot-water demand calculation.

What is the difference between the WaterMaster 70 Evo and 85 Evo?

The 85 Evo has a higher heating input and higher continuous hot-water flow capacity. At 40°C, ACV specifies approximately 2,087L/h continuous flow for the 70 Evo compared with 2,534L/h for the 85 Evo.

Is installation included with the ACV WaterMaster Evo?

The product page should not promise installation unless EuroFuelSupply is actually providing an installation service for the customer’s destination. The appliance should be installed and commissioned by an appropriately qualified professional.