Combi S 302 Polar Top is a ventilation unit that combines two heat recovery technologies.
Passive heat recovery takes place via a counterflow heat exchanger that utilises 83% 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 S 302 Polar Top 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 S 302 Polar Top 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.
DBTU damper
If there is not enough space to fit an EM-box, Nilan offers a DTBU damper, which can be fitted between kitchen and bathroom. The damper functions precisely like the EM-box but requires longer cables.
Expansion PCB
The expansion PCB provides additional functions for the CTS 602 control unit.
Pollen filter - ISO ePM1 50-65%
A pollen filter class ISO ePM1 50-65% can be fitted in the unit. The pollen filter is fitted with the ISO Coarse >90% (G4) plate filter.
| Dimensions (WxDxH) | 600 x 600 x 1015 mm |
| Weight | 87 kg |
| Plate type casing | Aluzinc steel plate, white powder coating RAL9016 |
| Heat loss casing | 32 W /-32 W (*1) |
| Fan type | EC, constant volume |
| Filter class | ISO Coarse >90% (G4) |
| Duct connections | Ø 160 mm |
| Condensate drain | PVC, Ø 20×1,5 mm |
| External leakage | < 0,78% |
| Internal leakage | < 1,47% |
| Supply voltage | 230 V (±10 %), 50/60 HZ |
| Max. input/power | 1,2 kW/5,2 A |
| Tightness class | IP31 |
| Standby power | 3 W |
| Ambient temperature | -10/+40 °C |
| Refrigerant | R134a |
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 ISO Coarse >90% (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
Attention! The SEL values are measured and stated as a total value for both fans.
Temperature efficiency
Temperature efficiency for units with counterflow heat exchanger according to EN308.
NB! Temperature efficiency is only for the counter flow heat exchanger (without heat pump operation)
Sound data
Sound data is for qv = 210 m3/h and Pt, ext = 100 Pa in accordance with EN 9614-2 for surface and EN 5136 for ducts.
Sound output level LWA drops with falling air volumes and falling back-pressure.
At a given distance, the sound pressure level LpA will depend on the acoustic conditions at the installation site.
COP (air-air)
Heat output factor COP [-] supply air as a function of outdoor temperature t21 [°C] and volume flow qv [m3/h] in accordance with EN14511 at a room temperature t11 = 21°C
COP according EN14511 is calculated for the heat pump and counter flow heat exchanger combined.
Heat output supply air
Heat output Qc [W] as a function of qv [m3/h] and outdoor air temperature t21 [°C]. In accordance with EN 14511, t11=21°C (extract air)
Heat output is the contribution to room heating added to the fresh air via Combi S 302 Polar Top to the supply air.
The ventilation loss is the heat output that is lost without heat recovery at the given volume flow air.
The CTS602 HMI touch panel is featuring a wide range of functions, e.g., menu-controlled operation, weekly programme settings, filter monitor with timer, fan speed adjustment, summer bypass, supply-heating element control, error messages etc.
The CTS602 comes with factory settings, including a default setting which can be customised to operational requirements to achieve optimum operation and utilisation of the system.
There is an option for selecting between 2 front page images for the main screen.
Operating instructions for the CTS 602 can be found in a separate user manual supplied with the unit.
Functional overview CTS 602 overview
| Functional overview |
+ Standard - Accessories |
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| 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. | + |
| User option 2 | With expansion PCB • 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 |
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| 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. | + |
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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. • T10 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. | + |
| Delayed start-up | There is a possibility for a delayed start-up by the fans, when a closing damper is installed. | + |
| 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). | + |
If you want to convert STEP files to Revit, do the following:
Import the STEP file to Autocad, export it as a 3D DWG file and then import the file into Revit.
