Lennox Chiller Investigation Work

Lennox Chiller Investigation Work

Job Description:  Lennox Chiller Investigation Work

Area: Fleet Street, London

Issue Identified:  Following the recent call outs and the faults on a Lennox Chiller we recommended a day’s investigation with the assistance of the BMS (Building Management System) engineer.

Investigation work carried out:

Attended site with BMS (Building Management System) engineer and completed a Lennox Chiller management system setup.  We discovered that chiller 1 had no dedicated signal from BMS output station. Chiller 2 had switchable signal, meaning two chillers / two three circuits could be running when one to two circuits are required. This caused chillers to overshoot set point and cause low load and low flow issues.

We liaised with the site engineer and advised findings. The solution to fit a chiller sequencer to control chillers accordingly during low load conditions which would allow chillers to formulate and load up when and if required thus reducing unnecessary stop/start scenarios which caused high energy consumption and excessive wear and tear in mechanical parts.

In the meantime, chiller one was switched off at the controller to allow chiller 2 to manage load.

Lennox  Chillers

ACES service and maintain all Lennox Chillers including Air Cooled Chillers, Water Cooled Chillers and Condenserless Liquid Chillers. These can be found in Data Centres, Hospitals, Hotels, Offices and Process Cooling. We have engineers based in London 24/7 available to respond within 1 to 2 hours for emergency call out.

Some of the many Lennox Chillers we support

• Lennox ECOLEAN
• Lennox eCOMFORT
• Lennox GENESIS
• Lennox AQUA
• Lennox NEOSYS
• Lennox HYDROLEAN
• Lennox MWC / MRC