Feature
Today another filter type is common in certain regions to address diesel particulates and odours where pollution is severe .
TECHNOLOGY ADVANCES Some brands of unitary systems have developed several unique elements and features that may include fast cooling mode , sterilisation , air dispersion techniques and even motion sensors that tie into efficiency and effective operation automatically according to an occupant ’ s movement .
Other brands may include functions that quickly freeze the heat exchanger to create frost as well as self-cleaning cycles to mitigate the existence of microorganisms . Further wi-fi enabled units can be controlled via a smart device and provide various data sets such as operating conditions , maintenance reminders , efficiency and usage patterns .
The incorporation then of artificial intelligence ( AI ) can further optimise various modes by analysing a space condition and based on usage patterns , operate at an ideal level .
In future scenarios , the relationship between connectivity , AI and machine learning will offer users the ability to have intricate integration and with inclusion of smart devices such as phones and watches will enable unitary equipment to automatically be set to individual or group preferences that is not necessarily possible with other larger HVAC systems .
MAINTENANCE AND MONITORING Monitoring unitary HVAC systems is important to ensure ongoing and correct operation . In other words , to confirm that components are working as they should and that equipment is responding properly to control signals . For the contractor , discomfort , complaints , and noise can be indicators of unitary system performance issues .
Best practice of course means adopting a preventive maintenance program which is critical in terms of function and efficiency . Keeping the unitary equipment in good condition results in a benefit of overall operations and maintenance costs and avoiding potential downtime , replacement , and shortened equipment lifespan .
Typically , a trained and authorised HVAC technician or mechanic performs the required equipment maintenance and repairs . Another benefit of unitary systems includes that any facility maintenance personnel or other approved on-site representatives can perform visual inspections and other routine checks , as well as document system issues .
As part of best practices , it is also important to keep a written log , preferably in electronic form of all services performed . This record should include findings from functions and diagnostics performed , corrective actions taken , equipment downtime , and other relevant issues noted . This will help identify recurring issues or systemic problems at each site .
© RACA Journal | Benjamin Brits © RACA Journal | Benjamin Brits
In cases where the unitary HVAC equipment supports critical systems or building functions , additional monitoring of the equipment performance should be included to identify pending performance and condition degradation and even the onset of failure .
In South Africa , unitary HVAC equipment also forms part of the Pressure Equipment Regulation and as such requires that any maintenance or repairs be done through a qualified technician that is also required to have been trained in the safe handling of refrigerants .
Maintenance of unitary equipment today can easily be managed through a novel system available locally that includes
A unitary unit installed in a wine and special spirit cooler room at an upmarket restaurant .
A dual split installation in a server room ensures redundancy mitigation .
www . refrigerationandaircon . co . za RACA Journal I November 2022 29