Essential Install June 2017 | Page 49

Essential Install | HVAC DID YOU KNOW: The optimum temperature level for sleep is between 65 and 72 °F guarantee on the body and two years on components, installers and users also have complete peace of mind.” Vanguard is suitable for all electric heating installations and storage heater replacements. Featuring a contemporary design, these models use less wall space than other aluminium electric radiators and are available in power ratings from 600 to 1,800W. Richard says Vanguard is perfect for whole home heating and uses the latest in digital electronic thermostat technology to offer controllable warmth, allowing different temperatures to be set for different times of the day. Its built-in thermostat is accurate to +/- 0.5 °C and helps maximise energy use. How To Effectively Control Heating And Cooling ThermoPad, made by CoolAutomation, is a standalone touch screen wall controller for air conditioning and heating When looking to control heating and air conditioning cooling in a property, often the challenge is how to control and interlock both, while using one room temperature sensor, says Eli Sellam, product manager at Tenways Engineering Services. Eli says: “Advanced Inverter Controlled VRF/VRV air conditioning systems have one refrigerant system that serves multiple indoor fan coil units, while each indoor unit can be controlled individually. The indoor unit regulates the flow of refrigerant to the unit using a Linear Expansion Valve. The Linear Expansion Valve operation is normally a slow modulated process which allows to achieve a stable temperature. The Air Conditioning indoor unit PCB reads the Room Temperature Thermistor (either Fan Coil Return Air Thermistor or the Room Controller Thermistor) and will then regulate the Refrigerant flow and command the outdoor unit accordingly.” Eil further explains: “By default, the heating and air conditioning systems will be controlled from separate thermistors which will often present different room temperatures (location, sensitivity etc.). “Many BMS systems are installed to control and interlock the heating/cooling in high end properties. However, as the air conditioning indoor unit will not read the room temperature from the BMS room Sensor, the BMS switches the indoor unit on or off based on the reading from the BMS room temperature thermistor. This normally results in poor room temperature balance. “In addition, normally if the BMS communication controller fails or communication is lost, the end yser will not be able to control the climate systems.” Eli says however that there is a solution: “ThermoPad, made by CoolAutomation, is a standalone touch screen wall controller for air conditioning and heating (underfloor, radiators, electric, etc.) connecting directly to both. As the ThermoPad connects directly to the air conditioning indoor fan coil unit (replacing the AC wired controller), the air conditioning system will read the room temperature from the ThermoPad internal or remote room temperature sensor. The same will apply to the heating, as the ThermoPad connects directly to low voltage heating wiring centres (such as Heatmiser UH1 or UH8-N). This interlocks the air conditioning and heating in the room while both are controlled from a single room temperature sensor. “As each ThermoPad is a standalone direct- connection controller, in case of automation/network failing, the local room control and heating/cooling interlock will not be affected.” Eli adds: “ThermoPad controllers also include a Modbus Communication protocol and can be daisy chained to a CoolMasterNet. This will allow automation systems to control both the cooling and heating from a single screen driver. Furthermore, control will be available from the CoolRemote App. “Many advanced features are available using the ThermoPad such as, second stage heating, freeze protection, set back, boost heating (AC heat combined with underfloor heating), automatic climate control changeover (AC cooling/underfloor heating).” More Information: Chowmain [phone], www.chowmainsoft.com Electrorad [phone],www.electrorad.co.uk Haverland [phone], www.haverland.co.uk Intelligent Controls (UK) [phone], www.intelligent-controls.co.uk Ivory Egg [phone], www.ivoryegg.co.uk Sensible Heat [phone], www.sensibleheat.co.uk SensibleEssentialInstal_banners_02_Layout 1 18/09/2014 17:10 Page 4 Tenways Engineering Services [phone], www.tenways.co.uk [email protected] www.sensibleheat.com sensible heat Advanced HVAC controls for the home June 2017 | 47