Zest WEG Group can also allocate an after-sales technician on a 24/7 basis to the customer to facilitate any maintenance, repairs and commissioning before and after the project. When it comes to stock availability, the company maintains large volumes of stockholding, particularly of certain key components. Facilitating high levels of stock availability, either at the premises of the contractor, the end-customer or at Zest WEG Group itself, helps to keep the project on track as there is no delay in sourcing the required parts, and maintenance downtime is kept to a minimum.
Key to the product offering for HVAC applications are WEG’s HVAC-dedicated variable speed drives (VSDs): the CFW701 model for applications up to 110 kW and the smaller WEG CFW501 unit suitable for applications up to 22 kW. The WEG VSD product range includes capabilities such as harmonic mitigation, built-in PLC functionality, by-pass, dry run, broken belt and sleep modes as well as a fire mode. This functionality can be interfaced using the BACnet communication protocol, Metasys and Modbus RTU. The VSDs also feature C3-level RFI filters.
“The speed control provided by these VSDs delivers substantial savings in terms of energy consumption, and also offers comprehensive motor protection,” says Liebenberg.
The company also supplies low voltage switchgear for the control panels in HVAC applications, as well as its WEG W22 smoke extraction motor – often used in basement fans installations. These high efficiency motors are IEC certified as well as SABS approved.