MTD ERV 365, ERV 350 manual Ventilation via Extractor Hood, Post-heater* in Duct System

3

side air no longer has to be temporarily reduced (or even interrupted for a short time) in order to pre- vent condensation freezing in the heat exchanger. Instead the preheater is temporarily switched on. In addition, this option offers greater comfort as the supply air is preheated to more or less room temperature.

The preheater is switched on and off automati- cally. As soon as the temperature of the outside air is below 0 oC for a certain period, the air duct of the preheater is opened and the preheater is switched on to heat the intaken outside air to at least 1 oC. Here a temperature sensor in the sup- ply air duct of the MTD-ERV 350 measures the temperature. This preheating control ensures bal- anced ventilation up to a maximum of 150 m³/h at -15 oC. The user cannot inßuence the automatic preheater control. The installer has to modify the preheating control, for example during installa- tion of the MTD-ERV 350, in menu P52 via the CC Ease operating unit (for further information, see section 4.4).

The preheater and the corresponding temperature sensor must be connected to the PCB panel behind the front panel of the MTD-ERV 350 by the installer. In the event of retrofitting, installation in- structions are supplied with the installa- tion kit.

3.4.2. Ventilation via Extractor Hood*

An extractor hood can be connected to the MTD- ERV 350.

This allows moisture (steam) and food odours to be discharged as quickly as possible via the ventilation system. For this, the extractor hood must be connected to the PCB panel (extended version) of the MTD-ERV 350. The extractor hood can then be operated via the CC Ease operating unit of the MTD-ERV 350.

Switching the extractor hood on and off, see section 2.3.4.

As soon as the extractor hood is switched on using the CC Ease operating unit, the valve of the extractor hood opens and the MTD-ERV 350 switches to the 'Extractor hood' function. Ventila- tion positions 1, 2 or 3 can be set. These ventila- tion positions for the extractor hood correspond to the 'normal' ventilation positions. Please note, however, that these ventilation positions for the extractor hood are always slightly higher (by x%) than the 'normal' ventilation positions. The user can set this x% value himself in menu P29 on the

CCEase operating unit (see also section 2.3.7). The following increase values can be selected:

In addition to this ventilation via the extractor hood, a temperature sensor is also installed in the extractor hood. This temperature sensor measures the temperature of the air discharged via the extractor hood. Should this temperature become too high, i.e. more than 60 oC, the valve in the extractor hood will close to protect the MTD-ERV 350 and in particular the heat/moisture exchanger.

3.4.3 Post-heater* in Duct System

As an option, the ventilation system can also be equipped with a post-heater.

The post-heater is a heater element that is in- stalled in the duct system of the ventilation sys- tem, in other words downstream of the MTD-ERV

Menu P29:

Setting the rate of increase

ϖ	Rate of increase	Minimum	1%
ϖ	Rate of increase	Standard	10%
ϖ	Rate of increase	Maximum	99%

350. The post-heater ensures that after the outside air has first been heated in the heat/moisture ex- changer of the MTD- ERV 350, the sup- ply air is additionally heated before it en- ters the living rooms. The advantage of the

post-heater is that the supply air can be directly admitted to the living rooms at the comfort tem- perature set for the dwelling. That means addi- tional comfort.

The post-heater is not supplied as stand- ard with the MTD-ERV 350. It is actually part of the duct system of the ventilation system and does not belong to the scope of supply of the MTD-ERV 350.

The post-heater is switched on and off automati- cally. As soon as the temperature of the supply air drops below the set comfort temperature, the post-heater is switched on to heat up the supply air to the comfort temperature. A temperature sensor

in the duct system measures the temperature of the supply air immediately behind the post-heat- er. The user cannot influence the automatic post- heater control system. The post-heater reacts to

20 Function of the System