Combi 302 Polar

Ventilation requirement of up to 320 m3/h.

Combi 302 Polar is for anyone who wants ventilation with highly efficient heat recovery and comfort heating and cooling.

Combi 302 Polar combines two heat recovery techniques, where the unit first recovers 85-90 % of the heat via the highly efficient counter flow exchanger. The residual energy is recovered via the unit’s heat pump, which is able to both heat and cool the supply air.

The unit extract hot, humid air from e.g. the kitchen, bathroom and utility room, at the same time removing dust particles, moisture and odours from the home. Furthermore, the energy from the extract air is used to heat the incoming air. Combi 302 Polar can replace 350 m³ air per hour.

When you buy Combi 302 Polar, you get a comfortable and healthy indoor climate and cost savings on your heating bill.

Combi 302 Polar is suitable for locating in an attic space.

CO2-sensor

With a CO2-sensor installed, the ventilation speed can be pre-programmed with CTS 602 to run at a higher ventilation steps when CO2 reaches high level in the extract air. CO2-level is programmable.

EM-box

 

An EM-box allows heat recovery from the air from the range hood and thereby helps to heat the supply air. The EM-box is equipped with a steel filter which efficiently cleans the range hood air of fat particles and thereby protects the system.

 

Installation kit

The installation kit comprises of four vibration absorbers and a water trap for the condensation outlet. The water trap can be ordered separately.

Heating cable

To protect the condensation outlet against frost, a 3 metre-long self-regulating heating cable can be ordered.

 

Combi 302 Polar is a ventilation unit that combines two heat recovery technologies.

Passive heat recovery takes place via a counterflow heat exchanger that utilises between 85% and 95% of the energy in the extracted air. Active heat recovery takes place via a heat pump that utilises the residual energy. The heat pump has a COP > 4, which eliminates the need to install a heating coil with an attached mixing circuit. Combi 302 Polar can increase the temperature of the supply air to over 30°C.

The heat pump also makes it possible to cool the supply air in the summer by up to 10°C. Due to the low air exchange, this does not function as an air conditioning system, but cooling the air intake reduces its humidity, giving a more pleasant and comfortable climate inside the home, even when the indoor temperature is high.

Combi 302 Polar is delivered with a built-in pre-heating element, which protect the counterflow heat exchanger against icing. This ensures continuous operation at low outdoor temperatures.

Dimensions (WxDxH) 1300 x 580 x 700 mm
Weight 83 kg
Plate type casing Aluzinc steel plate, white powder coating RAL9016
Heat loss casing 32 W /-32 W (*1)
Heat exchanger type Polystyrene counterflow heat exchanger
Fan type EC, constant volume
Filter class Standard G4
Duct connections Ø 160 mm
Condensate drain PVC, Ø 20×1,5 mm
External leakage < 1,1 % (*2)
Internal leakage < 1,8 % (*3)
Supply voltage 230 V (±10 %), 50/60 HZ
Max. input/power 2,1 kW / 11,4 A
Tightness class IP31
Standby power 3,2W
Ambient temperature -20/+40 °C
Compressor type Piston compressor

* 1   32 W: Outdoor air temperature -12 °C. Fitting location -12 °C.
        Extract air temperature 20 °C (room).
        -32 W: Outdoor air temperature -12 °C. Fitting location 20 °C.
        Extract air temperature 20 °C (room).
* 2  At ± 250 Pa and 300 m3/h according to EN 308/EN 13141-7.
* 3  At ± 100 Pa and 300 m3/h according to EN 308/EN 13141-7.

Capacity

Capacity of standard unit as a function of af qv and Pt, ext.

SEL values according to EN 13141-7 are for standard units with G4 filters and without heating element.

SEL values comprise the unit´s total power comsumption incl. control.

Conversion factior: J/m3 : 3600 = W/m3/h

Temperature efficiency

Temperature efficiency for units with counterflow heat exchanger according to EN308 (dry).

Temperature efficiency EN308: ɳt = (tsupply air-tfresh air)/(textract air-tfresh air)

Sound data

Sound data for qV = 210 m3/h and Pt, ext = 100 Pa according to EN 9614-2 for surfaces and EN 5136 for ducts.

Sound output level LWA drops with falling air volume and falling back pressure.

Sound output level LpA at a given distance will depend on acoustic conditions in the place of installation.

COP (heating)

Heat effect factor COP [-] supply air as function of outdoor temperature [°C] and volume flow qv [m3/h].

According to EN14511, extract air = 21°C.

Heat effect (supply air)

Heat effect Qc [W] as a function of qv [m3/h] and fresh air temperature [°C].

According to EN 14511, extract air = 21 °C

Supply air temperature (heating)

Supply air temperature [°C] as a function of fresh air temperature [°C] and volume flow qv [m3/h] balanced flow.

Extract air temperature = 21 [°C], 45 RH [%]

Supply air temperature (cooling)

Supply air temperature [°C] as a function of fresh air temperature [°C] and volume flow qv [m3/h] balanced flow.

Extract air temperature = 24°C

Connections
1: Fresh air
2: Supply air
3: Extract air
4: Discharge air
5: Condensate drain
6: Electrical connection

The Combi 302 Polar is controlled using its CTS 602 operating panel, featuring a wide range of functions, e.g., menu-controlled operation, weekly programme settings, filter monitor with timer, fan speed adjustment, summer bypass (free cooling), supply-heating element control, error messages etc.

The CTS 602 comes with factory settings, including a default setting which can be customised to operational requirements to achieve optimum operation and utilisation of the system.

The operating panel must be placed in a dry, frost-free location, at least 1.5 m above floor level and at least 0.5 m from any corner. Avoid placing the panel on an external wall or in areas in direct sunlight.

Operating instructions for the CTS 602 can be found in a separate user manual supplied with the unit.

Connections
1: Fresh air
2: Supply air
3: Extract air
4: Discharge air
5: Condensate drain
6: Electrical connection
7: Pre-heating element (frost protection)

Automation
T1: Fresh air sensor
T2: Supply air sensor
T4: Discharge air and defrost sensor
T10: Room sensor/Extract air sensor
RH: Humidity sensor

Functional overview CTS 602 overview

 Functional overview  

 + Standard

- Accessories

3 levels The control function is divided into 3 levels: User/Service/Factory with various options at each level  +
Weekly plan The unit has 3 weekly programmes (with a factory setting of “off”)
• Programme 1: for working families
• Programme 2: for stay-at-home families
• Programme 3: for businesses
There is also an option for you to set your own weekly programme.
 +
User option 1 This allows you to override the operating mode in the main menu via an external potential-free contact or PIR sensor.  +
Alarms Alarm log featuring the last 16 alarms.  +
Filter monitor Filter monitor with timer (factory setting of 90 days). Adjustable to 30/90/180/360 days.  +

Bypass     

Bypassing the outdoor air reduces heat recovery, enabling the desired supply air temperature to be maintained spring, summer and autumn.  +
Air quality Allows you to choose whether to switch humidity sensors and/or CO2 sensors on and off.  +/-
Humidity control Allows you to set a higher or lower ventilation step in the case of high/low air humidity.  +
CO2 control Allows you to set a higher or lower ventilation step in the case of a high/low CO2 level.  -
Air exchange Allows you to select a low ventilation step in the case of low outside temperatures and air humidity.  +
Defrost function Temperature-based automatic function for defrosting the heat exchanger.  +
Frost protection In case of failing heating system, the unit is turned off to avoid further cooling with a risk of the water heating coil frost bursting.  +
Temperature control Allows you to select the temperature sensor which will control the unit.
• T15 ROOM (panel sensor)
• T10 EXT (fitted in a representative extraction valve)
• T3 EXHAUST (extract air)
 +
Room control Allows you to set the regulator to control the room temperature.  +
Air volume Allows you to set four ventilation steps. Supply air and extract air are set individually.
• Step 1 < 25%
• Step 2 < 45%
• Step 3 < 70%
• Step 4 < 100%
 +
Fire alarm This allows you to connect fire-detecting thermostats, smoke detectors and other fire alarm contacts.

In case of an alarm, smoke dampers are closed and the unit stops.

 +
Joint alarm Outlet for joint alarm  +
Constant pressure control Allows control from both the extract air and supply air side.  -
Cooling The heat pump has a reversible coolingcircuit, which means that the coolingcircuit can be reversed, with the unit cooling instead of heating the supply air.

 

 +
Intake air control Allows you to set the regulator to control the intake air temperature/supply air
(only available if the control unit has been configured for a supply-heating element).
 +
Delayed start-up There is a possibility for a delayed start-up by the fans, when a closing damper is installed.  +
Expansion PCB Allows you to make additional connections, e.g.
• User option 2 overrides User option 1 (e.g. connecting an EM box)
• Up to 500 W direct
• Can give the signal for external heating if the defrost function is used
• Switching the central heating system on/off
 +
Reset Allows you to restore the factory settings.  +
Manual test Allows you to test the unit’s functions manually.  +
Language Option for setting the relevant language (Danish/Finnish/Norwegian/Swedish/German/English/French).  +