Installation of the CQ HRU (CQ 350/450 & 600)

IG MVHR 06

Installation on the wall

Installation of the condensation drain
The condensation created by the unit must be drained off frost-free, at a gradient and incorporate an air seal. To drain the condensation from the unit, two bayonet connections are located on the bottom of the unit. These connections are not air tight. Thus it is necessary to close off these connections with the separately delivered sealing cap(s) or with a dry siphon. ⚠ Do not install a water lock (U-bend) on to the unit. On warm days the water will evaporate from the siphon. Enthalpy exchanger installed: When the unit is fitted with an enthalpy exchanger the humidity from the extracted air is partly transferred to the fresh supply air. In this case there is no need to condensate to be drained from the unit. When no dry siphon is installed, seal off both Omnie bayonet connections with the separately delivered condensation drain sealing caps. The unit is not airtight if these connections are left open. ☞ When desired you can always connect a dry siphon to a bayonet connection.

Installation of the condensation drain

The condensation created by the unit must be drained off frost-free, at a gradient and incorporate an air seal. To drain the condensation from the unit, two bayonet connections are located on the bottom of the unit. These connections are not air tight. Thus it is necessary to close off these connections with the separately delivered sealing cap(s) or with a dry siphon.

⚠ Do not install a water lock (U-bend) on to the unit. On warm days the water will evaporate from the siphon.

Enthalpy exchanger installed:

When the unit is fitted with an enthalpy exchanger the humidity from the extracted air is partly transferred to the fresh supply air. In this case there is no need to condensate to be drained from the unit.

When no dry siphon is installed, seal off both Omnie bayonet connections with the separately delivered condensation drain sealing caps. The unit is not airtight if these connections are left open.

☞ When desired you can always connect a dry siphon to a bayonet connection.

Installation of the air ducts

The unit is supplied with a semi rigid system and manifold. When installing an Omnie air duct system read its installation instructions first. The next aspects must always be kept in mind during the installation of the air ducts:

⚠Always connect air ducts of at least 900mm to the unit before you connect the power to the unit. This ensures the motor cannot be touched while the unit is active.

The distance (E) between the opening of the outdoor air duct (A) and the opening of the exhaust air duct (B) must be at least 1.5 m;
The position of the outdoor air opening (A) relative to other possible sources of stale air is very important (other exhaust-air outlets, street versus garden, etc.);
Drain the exhaust duct (D) in the direction of the unit.
Insulate the outdoor air duct and the exhaust air duct between the roof/wall passage to render the unit damp proof. This prevents the formation of condensation on the outside of the ducts;
Omnie recommends that you fit thermal and damp-proof insulation to the supply duct from the unit up to the supply valves and or grilles. This will prevent unnecessary temperature loss in the summer and winter;
Install the air duct with as little air resistance as possible and free from air leakage;

Size      Minimum air ducts ø

350       150mm

450       180mm

600       180mm
Make sure the inside of the air ducts do not have an obstruction of any sort. Air ducts must not have sharp bends, dents or long screws inside. Obstructions will compromise the performance and maintenance of the system;
Install a silencer directly onto the supply air and extract air connections and ensure it is straight. For relevant recommendations, please contact Omnie;

Code	Meaning
ODA	Outdoor air
SUP	Supply air
ETA	Extract air
EHA	Exhaust air
R	Supply and extract air to the right side
L	Supply and extract air to the left side

Installation of the valves and/or grilles
Install supply and extract valves and/or supply and extract grilles (e.g. in an open living kitchen) at least 1m from each other. This will prevent the supply air short circuiting with the extract air; Use clean sector valves when the valves are installed close to the wall. This will keep the walls clean; To ensure good transfer of air throughout the dwelling, there should be a grille or gap near the inside doors. The grille or gap must provide an overflow of at least 12cm² per l/s. This is equivalent to: A gap under the inside doors of minimum area 7600mm² above the floor finish; A gap under the inside doors of at least 10mm for a standard 760mm width door. ⚠ Do not obstruct these openings. For instance with furniture, draught excluders or deep pile carpet, as the airflow in the house will stagnate.

Installation of the valves and/or grilles

Install supply and extract valves and/or supply and extract grilles (e.g. in an open living kitchen) at least 1m from each other. This will prevent the supply air short circuiting with the extract air;
Use clean sector valves when the valves are installed close to the wall. This will keep the walls clean;
To ensure good transfer of air throughout the dwelling, there should be a grille or gap near the inside doors. The grille or gap must provide an overflow of at least 12cm² per l/s. This is equivalent to: A gap under the inside doors of minimum area 7600mm² above the floor finish; A gap under the inside doors of at least 10mm for a standard 760mm width door.

⚠ Do not obstruct these openings. For instance with furniture, draught excluders or deep pile carpet, as the airflow in the house will stagnate.

Commissioning procedures
Omnie recommends cleaning the air ducts before commissioning the unit when the dwelling is being occupied. This will prevent damage to the furniture from building dust blown out of the air ducts.

Commissioning procedures

Omnie recommends cleaning the air ducts before commissioning the unit when the dwelling is being occupied. This will prevent damage to the furniture from building dust blown out of the air ducts.

Installation of the CQ HRU (CQ 350/450 & 600)

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