Central plant is where a building's maintenance budget concentrates and where failure is most disruptive, and it is also the equipment that gives the most warning before it fails. Approach and condenser temperatures, pressures, water chemistry and combustion figures all drift before anything stops. Whether that warning is useful depends entirely on whether somebody is writing the numbers down.
The chiller maintenance checklist runs on readings
A chiller maintenance checklist should capture suction and discharge pressures, approach temperatures, oil level and condition, amp draw and the condenser water condition, on every routine visit. Individually these numbers mean little; across a season they show fouling developing and efficiency falling long before a fault. Industrial chiller maintenance adds load profile to that, because a machine short-cycling against a badly matched load wears in ways no interval-based task addresses.
Cooling towers are a water treatment problem
A cooling tower maintenance checklist covers the mechanical items, which are fill condition, drift eliminators, fan and drive, and basin cleanliness, but most of the operational risk sits in water chemistry and its consequences for scale, corrosion and biological growth. That regime is set by a water treatment specialist and by rules that apply to the site, not by a maintenance template, and the planner's job is making sure the specified checks and dosing are on the calendar and evidenced rather than assumed.
Boilers and the controls that sit above everything
Commercial boiler maintenance concentrates on combustion efficiency, safety devices and interlocks, water treatment, and the flue, on a rhythm that is naturally annual and pre-season. A boiler preventive maintenance checklist should keep the safety-device checks unambiguously separate from the efficiency work, because they are the items that must not be skipped when a visit runs short. Bas maintenance, meaning the building automation system controlling all of this, is the most neglected item on most sites: sensor drift and overridden setpoints quietly waste more energy than any mechanical fault, and nothing alarms.
Questions people ask about chiller maintenance
What should a chiller maintenance checklist record?
Suction and discharge pressures, approach temperatures, oil level and condition, amp draw, and condenser water condition. The value is in comparing them across a season, not in any single visit.
What matters most on a cooling tower?
Water chemistry and its consequences. The mechanical items are straightforward; the treatment regime is set by a specialist and by rules applying to the site, and the planner's job is that it happens and is evidenced.
Why does BAS maintenance get neglected?
Because nothing alarms. Sensor drift and overridden setpoints waste more energy than most mechanical faults and are invisible unless somebody deliberately reviews the control system.