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WaterMaster 25 Evo

Direct gas fired condensing water heater

5-Year Warranty
Tank-in-Tank technology
Nat Gas and LPG

label_energy_GAS
Hot Water Heater
Standard
Concentric
Floor installation

# GTIN : 5400891528167

# P/N : XB660001

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Can deliver large peak and continuous volumes of hot water
Operates in most efficient mode (fully condensing)
Reduces legionella risk due to temperature stored at >60°C
Low NOx levels
Small footprint allows installation in tight plantrooms
Low maintenance with no anode protection required
Compliant with latest Ecodesign regulations for DHW
Corrosion-resistant stainless steel heat exchanger and tank reduces maintenance and increases system lifespan
Suitable for vented or unvented systems (optional unvented kit required)
Easy to use standardised controls using ACVMax control system
Supplied with LPG kit for simple on-site conversion
Improved access for service and maintenance
Supplied with factory fitted T&P relief valve for ease of installation

Schematic — Concentric flue gas/air inlet box

Flue gas exhaust tube

Combustion chamber

Stainless steel heat exchanger

Stainless steel “Tank-in-Tank” hot water production tank

Primary circuit separation disc

Indirect water pre-heater

Insulation

Condensate recovery dish + NTC5 sensor (flue gas)

High efficiency circulator pump

NTC2 sensor (primary return)

Electrical panel (with spare fuses at the back)

ACVMax Touch Control panel

On-Off switch

DHW tank dry well (Dip tube with temperature sensor)

Automatic air vent

Gas pipe

NTC1 sensor (primary supply)

Gas valve

DHW safety valve / (T&P relief valve - UK only)

Modulating air/gas premix burner with fan

Air inlet

DHW outlet

DHW recirculation tube

Constructive characteristics
		WaterMaster 25 Evo	WaterMaster 35 Evo	WaterMaster 45 Evo
Capacity (total)	L	196	196	196	L
Capacity (primary)	L	100	100	100	L
Capacity (domestic hot water)	L	96	96	96	L
Chimney: Max pressure drop in flue pipe	Pa	130	130	130	Pa
Chimney: max length of concentric flue pipe	m	20	20	20	m
Chimney connection	Ømm	80/125	80/125	80/125	Ømm
Connection - heating	Ø"	1 F	1 F	1 F	Ø"
Connection - DHW	Ø"	1 M	1 M	1 M	Ø"
Connection gas	Ø"	3/4 M	3/4 M	3/4 M	Ø"
Connection - safety valve	Ø"	1/2M	1/2M	1/2M	Ø"
Max operating temperature	°C	87	87	87	°C
Water pressure drop boiler at Δt = 20°C	mbar	3	6	10	mbar
Max service pressure heating (primary)	bar	3	3	3	bar
Max service pressure (DHW)	bar	8,6	8,6	8,6	bar
Height when tilted	mm	1872	1872	1855	mm
Weight (empty)	kg	177	177	177	kg
Heating characteristics
		WaterMaster 25 Evo	WaterMaster 35 Evo	WaterMaster 45 Evo
Pre-heating time from 10 to 80°C (Heat source: boiler)	min	35	26	23	min
Reheat time from 40 to 90°C	min	30	28	25	min
Reheat time from 40 to 80°C	min	22	22	16	min
Heating time from 10 to 90°C	min	43	33	30	min
Combustion
		WaterMaster 25 Evo	WaterMaster 35 Evo	WaterMaster 45 Evo
Input max (heating) HCV	kW	27,8	38,9	50,0	kW
Input max (heating) LCV	kW	25,0	35,0	45,0	kW
Combustion efficiency	%	98,2	98,2	97,9	%
Efficiency DHW mode ΔT 30K	%	105,4	105,4	103,1	%
Efficiency DHW mode (EN89)	%	108,5	108,5	108,5	%
CO emissions max output	ppm	27	48	63	ppm
CO emissions min output	ppm	6	4	4	ppm
Mass rate of combustion products (gas)	kg/h	42	56	76	kg/h
NOx weighted (GCV) (EN15502)	mg/kWh	21,5	26,7	30,2	mg/kWh
NOx class (EN15502)		6	6	6
Gas flow rate (min output)	m³/h	0,5	0,7	0,9	m³/h
Domestic hot water performance
		WaterMaster 25 Evo	WaterMaster 35 Evo	WaterMaster 45 Evo
Peak flow at 40°C	L/10’	361	408	451	L/10’
Peak flow 1st hour at 40°C	L/60’	1018	1328	1610	L/60’
Continuous flow at 40°C	L/h	788	1104	1390	L/h
Peak flow at 45°C	L/10’	301	339	373	L/10’
Peak flow 1st hour at 45°C	L/60’	865	1127	1366	L/60’
Continuous flow at 45°C	L/h	676	946	1192	L/h
Peak flow at 60°C	L/10’	183	197	224	L/10’
Peak flow 1st hour at 60°C	L/60’	577	749	894	L/60’
Continuous flow at 60°C	L/h	473	662	820	L/h
Electrical Characteristics
		WaterMaster 25 Evo	WaterMaster 35 Evo	WaterMaster 45 Evo
Voltage	V	230	230	230	V
Frequency	Hz	50	50	50	Hz
Protection IP		20	20	30
Electrical consumption	W	95	110	126	W
Electrical power requirements	A	0,7	0,8	0,85	A
Eco Design Fields
		WaterMaster 25 Evo	WaterMaster 35 Evo	WaterMaster 45 Evo
Declared load profile		L	L	L
Water heating energy efficiency class		A	A	A
Water heating energy efficiency [ηwh] (EU 814/2013 Art 2 (15) Ann.IV-3)	%	87,2	87,2	87,2	%
Sound power level indoors LWA	dB	60	60	59	dB
Energy Label EU
Product Fiche

Technical brochure
ACVMax Touch - Installer's handboek for EVO appliances (2022 ->)	8.83MB – en
Evo Range Gas Conversion Procedure	2.28MB – fr en pl it de es ru
Filling kit 788498 for WaterMaster (multilanguage version)	485.99kB – fr en nl pl it de es ru
Technico-commercial manual - HeatMaster TC EVO - WaterMaster EVO (X)	4.91MB
WaterMaster 25 Evo Data Sheet	257.90kB – en
WaterMaster 25-35-45-70-85-120-25X-45X-70X Evo : Installation, operation and maintenance instructions	10.07MB – en
Ecodesign
Energy Label EU
Product Fiche
BIM Files
BIM Files