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Tips and tricks for installing Ulow E2 fan-assisted radiators
1. Ulow E2 fan-assisted radiator and piping
The recommended pipe diameter for systems with fan-assisted radiators is 20 mm. This is slightly larger than the standard size, but it makes it easier to adjust the water flow and properly balance the system. Because fan-assisted radiators such as Ulow E2 offer higher outputs, you can lower the system temperatures. However, the lower the delta t and the supply temperature, the more important proper water flow and hydronic adjustment become. Using a larger pipe diameter makes this task easier.
Read more about the importance of delta t in hydronic heating systems
2. Ulow E2 fan-assisted radiator and actuators
The easiest way to mount the actuator onto a Ulow E2 fan-assisted radiator is to plug in the unit. The actuator will open almost immediately. You can then unplug the unit so that the actuator remains open. This way you can easily mount the actuator hand-tight onto the Ulow E2 without having to push to get the actuator on. In fact, pushing hard can damage the actuator.
Don’t wait too long to unplug the unit. Otherwise, the actuator will close again. You can compare this to mounting a standard thermostatic head onto a radiator. It’s also best to mount it in its largest possible open position and then after mounting put it in the desired position.
3. Positioning the Ulow E2 fan-assisted radiator
Be careful when placing the Ulow E2 fan-assisted radiator in the vicinity of a curtain. If the curtain is right above the Ulow E2, the hot air will rise behind the curtain and the radiator will not be able to heat the room properly. Moreover, the actuator measures the room temperature, but if there is a curtain around it, it will be impossible for it to measure the temperature correctly. This will also prevent the Ulow E2 from functioning properly.
4. Optimal control of the Ulow E2 fan-assisted radiator
For easier operation, we recommend using the Ulow E2’s remote control. This allows users to see at a glance what mode the Ulow E2 is operating in. It also allows you to control several devices in one room from a single control.
On the radiator, the LED lights are programmed to go out after a certain amount of time to use as little electricity as possible. However, sometimes users forget in which mode they put the Ulow E2 or which room temperature was requested. Consequently, they often press a button and then accidentally change the requested room temperature or operating mode. This can quickly lead to a misunderstanding between what the user expects the Ulow E2 to do and what it actually does.
Discover how heating controls help to lower the cost of comfort
5. Horizontal Ulow E2 fan-assisted radiator
For the Ulow E2 horizontal, we recommend connecting the radiator hydronically in the cooling option. This way, you lose about 10% of the heating power mentioned in our catalogue, but you do get the indicated cooling power. In the heating connection, you can only get half the stated cooling power out of it.
In addition, in the connection for cooling the water supply temperature is measured to control the device. This is more stable than the return temperature, especially if the installation is not 100% correctly regulated. Unfortunately, the latter still happens quite often.
For the Ulow E2 vertical, the 10% loss in heating power becomes 30%. When installing this type of unit, we therefore recommend a case-by-case evaluation.
Discover 5 reasons why vertical radiators stand out
6. Supply temperature for the Ulow E2 fan-assisted radiator
For heating, a fixed supply temperature of 35°C (or higher if desired) is recommended. The Ulow E2 uses the difference between the water supply temperature and the room temperature to determine the speed of the internal fans. If this difference is too small, the fans will (practically) not run. However, fan support is needed to get the maximum power from the unit.
7. Cooling with the Ulow E2 fan-assisted radiator
For cooling, you shouldn’t set the water temperature below 18°C. Ulow E2 is a fan radiator and thus has no condensation drain. So you always need to stay above the dew point. The device will need to measure a minimum difference of 3°C to turn on the fans. Without it, the unit will not reach the specified cooling capacity.
If you have any questions about our fan-assisted radiators, or need tailored advice for installing them, please don’t hesitate to get in touch. Our experts are happy to help.