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Comparison Vaillant turboTEC plus VUW 282/5-5 28.9 kW vs Vaillant turboTEC plus VU 282/5-5 28.9 kW

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Vaillant turboTEC plus VUW 282/5-5 28.9 kW
Vaillant turboTEC plus VU 282/5-5 28.9 kW
Vaillant turboTEC plus VUW 282/5-5 28.9 kWVaillant turboTEC plus VU 282/5-5 28.9 kW
Outdated ProductOutdated Product
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Energy sourcegasgas
Installationwallwall
Typedual-circuit (heating and DHW)single-circuit (heating only)
Heating area231 m²231 m²
Technical specs
Heat output28.9 kW28.9 kW
Min. heat output9.4 kW9.4 kW
Power supply230 V230 V
Power consumption145 W145 W
Coolant min. T30 °С30 °С
Coolant max. T80 °С80 °С
Heating circuit max. pressure3 bar3 bar
DHW circuit max. pressure10 bar
Consumer specs
DHW min. T35 °С
DHW max. T65 °С
"Summer" mode
Warm start
Circulation pump
Control buseBuseBus
Boiler specs
Efficiency93 %93 %
Combustion chamberclosed (turbocharged)closed (turbocharged)
Flue diameter60/100 mm60/100 mm
Inlet gas pressure13 mbar20 mbar
Max. gas consumption3.2 m³/h3.2 m³/h
Expansion vessel capacity10 L10 L
Expansion vessel pressure1 bar
Coolant performance1203 L/h
Heat exchangercopper
Connections
Mains water intake3/4"
DHW flow3/4"
Gas supply1/2"1/2"
Central heating flow3/4"3/4"
Central heating return3/4"3/4"
Safety
Safety systems
gas pressure drop
water overheating
flame loss
draft control
 
 
gas pressure drop
water overheating
flame loss
draft control
water circulation failure
frost protection
More specs
Dimensions (HxWxD)800x440x338 mm800x440x338 mm
Weight42 kg42 kg
Added to E-Catalogoctober 2017october 2017

Type

Depending on the set of functions, boilers are divided into single-circuit and dual-circuit.

- Single-circuit boilers are equipped with one heat exchanger, in which the heat from fuel combustion is transferred to the heat medium of the heating system. The only function of such boilers is space heating. It is technically possible to use single-circuit boilers to provide hot water, but this requires an additional tank (the so-called indirect water heater).

- In dual-circuit boilers, the primary heat exchanger is supplemented by a secondary one. Due to this, such a boiler, in addition to heating the room, also provides a hot water supply. In this case, both running water and water accumulated in a special tank(see Built-in water heater tank) can be used.

DHW circuit max. pressure

The maximum pressure in the hot water circuit (DHW) at which it can operate for a long time without failures and damage. See "Heating circuit maximum pressure".

DHW min. T

The minimum temperature of domestic hot water (DHW) supplied by a dual-circuit boiler. For comparison, we note that water begins to be perceived as warm, starting from 40 °C, and in centralized hot water supply systems, the temperature of hot water is usually about 60 °C (and should not exceed 75 °C). At the same time, in some boilers, the minimum heating temperature can be only 10 °C or even 5 °C. A similar mode of operation is used to protect pipes from freezing during the cold season: the circulation of water with a positive temperature prevents the formation of ice inside and damage to the circuits.

It is also worth keeping in mind that when heated to a given temperature, the temperature difference ("ΔT") may be different — depending on the initial temperature of the cold water. And the performance of the boiler in the DHW mode directly depends on ΔT; see below for performance details.

DHW max. T

The maximum temperature of domestic hot water supplied by a dual-circuit boiler. For comparison, we note that water begins to be perceived as warm, starting from 40 °C, and in centralized hot water supply systems, the temperature of hot water is usually about 60 °C (and should not exceed 75 °C). Accordingly, even in the most modest models, this figure is about 45 °C, in the vast majority of modern boilers, it is not lower than 50 °C, and in some models, it can even exceed 90 °C.

Also when heated to a given temperature, the temperature difference ("ΔT") may be different — depending on the initial temperature of the cold water. And the performance of the boiler in the DHW mode directly depends on ΔT; see below for performance details.

"Summer" mode

It is an operating mode designed for the warm season. In this mode, it works only to provide domestic hot water, and the heating is turned off. If the boiler is equipped with an outside temperature sensor, this sensor is also switched off in summer mode so that the heating does not turn on at night when the outside temperature drops.

Warm start

Support for the warm start function by the boiler.

This function is found only in dual-circuit models (see "Type"): it accelerates the water heating for the domestic hot water system and ensures a constant leaving water temperature. To do this, the boiler automation monitors and controls the temperature of the water in the secondary heat exchanger of the boiler. The presence of a "warm start" affects the cost of the unit, but this is offset by the ease of use.

Inlet gas pressure

It is the optimum gas pressure supplied to the inlet of the boiler system. Most often indicated for natural gas and is about 15-20 mbar. This parameter must match the specs of the gas supply system. However, the pressure in the latter may be higher, which may require the installation of a special gas regulator.

Expansion vessel pressure

It is a pressure in the hermetically sealed part of the expansion vessel (for details on the design, see Expansion vessel capacity). The required pressure in the expansion vessel must be approximately 0.3 bar higher than the initial pressure in the system. The initial pressure, in turn, directly depends on the total height of the heating system or, rather on the difference between the height of the highest and lowest points of the heating system. It can be derived using the approximate formula P=H/10, where P is the initial pressure in the bar, and H is the height difference between the highest and lowest point of the system in metres. Thus, if the height difference is 2 m, the initial pressure in the system is 0.2 bar, and the pressure in the expansion tank must be at least 0.5 bar.

Coolant performance

The amount of heat carrier passing through the boiler heat exchanger per unit of time. The optimal performance is such that three full volumes of the entire heating system pass through the heat exchanger per hour.
Vaillant turboTEC plus VUW 282/5-5 often compared
Vaillant turboTEC plus VU 282/5-5 often compared