Viwa Aluminum Heat Exchanger Wall-Mounted Boiler

Viwa

Size
720 x 615 x 498 mm.

Heat Exchanger
A-Si -Mg Alloy Monoblock Heat Exchange

Capacity
Efficient solutions for different needs with 90 kW, 115 kW ,125 kW and 150 kW capacity options.

Cascade Installation
Cascade installation feature for up to 14 devices without the need for an intermediate unit card

Control Panel
Easy-to-Use LCD Display Control Panel

Sound Level
62-63 dB

Design
100% Domestic Design

Efficiency
Up to 107% high efficiency*

With our Viwa boilers, you will have a long-lasting boiler system with high efficiency and the master usage feature on every device thanks to the specially manufactured monoblock heat exchanger.

Al - Si - Mg Alloy Monoblock Heat Exchanger
Master Control System on All Devices*
Aconit® Burner Ensuring Perfect Combustion.
Integrated with both hermetic and standard chimneys for easy use (compatible with Type B and C chimneys).
High Efficiency and Long-Lasting with Aging System
Ability to use in tall buildings (up to 6 bar)
Communication of the cascade system without the need for external panels through the built-in module
2 Year Warranty
Safe Usage with Superior Safety and Control System.
Compact Dimensions.
High level of insulation and low heat loss with a thickness of 10 mm
Easy installation with the Smart Socket System
Easy, fast, and cost-effective cascade installation for up to 14 boilers with the Smart Socket-Plug System
According to the new efficiency system, it corresponds to 98% efficiency.

Product Compare

Product Information Form

TECHNICAL DATA		Viwa 90			Viwa 115			Viwa 125			Viwa 150
Gas Circuit / Gas Type		G20	G25	G31	G20	G25	G31	G20	G25	G31	G20	G25	G31
Gas supply pressure		20	25	37	20	25	37	20	25	37	20	25	37
Gas Consumption at Maximum	m³/h	9,30	11,00	3,49	11,55	13,41	4,54	12,74	14,9	4,90	15,27	17,71	5,84
Gas Consumption at Minimum	m³/h	1,54	1,74	0,55	1,79	2,06	0,71	2,01	2,32	0,79	2,42	2,87	0,97
Fuel Gross Calorific Values (GCV) at 15 °C and 1013.25 mbar [Natural Gas G20 (Hu=10,6972 kWh/m³); Natural Gas G25 (Hu=9.2361 kWh/m³); LPG G31 (Hu=27.175 kWh/m³)]
Premix System		Pneumatic
Modulation Range		1/6
Heat Exchanger Material		Al-Mg-Si
Efficiency		G20	G25	G31	G20	G25	G31	G20	G25	G31	G20	G25	G31
(80/60 °C) Efficiency at Maximum Heat Output	%	97,7	97,7	97,7	97,5	97,5	97,5	97,8	97,8	97,8	97,6	97,6	97,6
(50/30 °C) Efficiency at Maximum Heat Output	%	103,6	103,2	103,6	102,7	102,7	102,7	103,6	103,6	103,6	103,0	103,0	103,0
Efficiency at 30% load at 36/30 °C	%	107,5	108,1	107,5	107,2	107,2	107,2	108	108	108	107,5	107,5	107,5
Seasonal space heating energy efficiency (expressed in terms of GCV)	%	92 (Class A)
Radiator Circuit		G20	G25	G31	G20	G25	G31	G20	G25	G31	G20	G25	G31
Maximum heat input Qn	kW	90,0	90,0	90,0	115,0	115,0	115,0	125,0	125,0	125,0	150,0	150,0	150,0
Minimum heat input Qn	kW	14,5	14,5	14,5	17,5	17,5	17,5	20,0	20,0	20,0	24,0	24,0	24,0
Maximum Heat Output Pn (80/60 °C)	kW	87,9	87,9	87,9	112,0	112,0	112,0	122,2	122,2	122,2	146,3	146,3	146,3
Minimum Heat Output Pn (80/60 °C)	kW	13,2	14,0	13,2	15,4	15,4	15,4	17,8	17,8	17,8	21,6	21,6	21,6
Maximum Heat Output Pn (50/30 °C)	kW	93,2	92,8	93,2	118,0	118,0	118,0	129,0	129,0	129,0	154,5	154,5	154,5
Efficiency at 30% load at 36/30 °C	kW	107,5	108,1	107,5	107,2	107,2	107,2	108,0	108,0	108,0	107,5	107,5	107,5
Minimum Heat Output Pn (50/30 °C)	kW	16,1	15,6	16,1	19,0	19,0	19,0	20,8	20,8	20,8	25,1	25,1	25,1
Temperature selection range (min÷max) HIGH / LOW temperature	°C	25 ÷ 80 / 25 ÷ 47
Operating Pressure (Maximum)	bar	6
Operating Pressure (Minimum)	bar	0,8
Electricity Circuit
Electricity Supply	V AC–50 Hz	230 V +%10; -%15
Electricity Consumption (Max./Min.)	Watt	29 / 120			30 / 128			29 / 169			30 / 265
Protection Index	IP	IPX5D
Exhaust Gas Circuit		G20	G25	G31	G20	G25	G31	G20	G25	G31	G20	G25	G31
(80/60 °C) Exhaust gas temperature (Min. / Max.)	°C	54/62	54/65	56/63	53/68	55/67	54/71	56/59	56/65	57/64	57/68	56/69	57/69
(50/30 °C) Exhaust gas temperature (Min. / Max.)	°C	30/46	30 /49	31/46	31/50	31/54	32/52	30/47	30/47	30/45	30/48	31/49	31/48
NOx	Class	6
Weighted value of NOx (GCV)		18	43		28	49	54	25	43	48	29	46	52
Flue mass flow rate (60/80°C - Qn) Nominal/ Minimum	g/s	39/6			48/7			53/8			64/8
Fan head loss
General
Dimensions (H x W X D)	mm	720 x 615 x 498			720 x 615 x 498			720 x 615 x 498			720 x 615 x 498
Sound Level	dB(A)	62			62			63			63
Net Weight	kg	70			70			82			82
Packed Device Weight	kg	87			87			99			99
Type		B23 , B23P , C13 , C33 , C43 , C53 , C63 , C83 , C93
Category		I2H, I2E, I2E(S), I2H, I2L, I2ELL, I3P, II2H3P, II2L3P, II2E+3P
All information given in the brochure was obtained as a result of the tests. The data may be changed without prior notice.