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Commercial Chiller Preventive Maintenance Programs in NYC
Planned annual maintenance for the centrifugal, screw, scroll, and absorption chillers that anchor your building's cooling plant. Com+ Mechanical keeps your tonnage online, your kW/ton in check, and your tenants comfortable across the five boroughs, Long Island, Westchester, northern NJ, and Stamford.
Chiller Problems We Catch Before They Shut You Down
Rising condenser approach temperature
Mineral scale, mud, and biofilm fouling on the condenser tubes force the compressor to work against higher head pressure, spiking energy use and tripping high-pressure safeties on hot days. PM tube cleaning restores the design approach and recovers lost efficiency.
Refrigerant charge loss and low evaporator pressure
Slow leaks at flange gaskets, rupture disks, or seals lower the charge, drop suction pressure, and risk freeze-ups and nuisance trips. Routine leak inspection and charge verification keep tonnage and capacity where they belong.
Acidic or moisture-contaminated compressor oil
Oil analysis catches rising total acid number, moisture, and wear metals that signal a developing motor or bearing problem. Left unfound, contaminated oil leads to motor burnout and a five- to six-figure compressor rebuild.
Degraded motor winding insulation
Annual megohmmeter testing trends insulation resistance to ground; a falling reading warns of winding deterioration before a hermetic or open-drive motor fails outright and strands the building without cooling.
Starter contact and electrical connection wear
Pitted contactor contacts and loose, heat-discolored lugs create voltage imbalance and single-phasing risk that can destroy a compressor motor on startup. Contact inspection and torque checks prevent avoidable electrical failures.
Sticking or failed safety controls
Drifted low-chilled-water, oil-differential, and pressure cutouts either nuisance-trip the plant or, worse, fail to protect it. Testing and calibrating safeties each year keeps the machine from running itself into damage.
Why a Chiller PM Program Protects Your Largest Mechanical Asset
A central chiller is the single most expensive and most critical piece of equipment in most commercial cooling plants, and it degrades quietly. Fouled condenser tubes, a drifting refrigerant charge, acidic oil, and worn starter contacts don't trip an alarm; they just push your approach temperatures up, drive your kW/ton higher, and shorten compressor life month after month until a summer afternoon failure takes the building offline. A structured preventive maintenance program reverses that curve. Com+ Mechanical builds annual chiller PM programs around the actual machine you operate, scheduling spring startup, in-season inspections, and fall shutdown so issues are caught at idle in the off-season rather than under full load in July. For property managers and facilities directors running occupied office, multifamily, healthcare, data, and mixed-use buildings across the NYC metro, that means fewer emergency calls, defensible energy performance, and a cooling plant you can budget for instead of react to.
What Your Chiller PM Program Includes
What Your Building Gains
Our Simple Process
From call to comfort in 4 easy steps
Plant Assessment
We survey your chiller make, model, tonnage, refrigerant, and starter type, review nameplate and operating logs, and document the current condition of the tubes, oil, controls, and electrical to establish a baseline.
Scoped PM Plan
We design an annual scope and visit schedule around manufacturer intervals and your occupancy and load profile, sequencing spring startup, in-season checks, and fall shutdown across single or multiple buildings.
Scheduled Execution
Our technicians perform each visit on schedule, complete tube cleaning, oil and refrigerant work, and electrical and controls testing, and capture readings against the baseline at every service.
Reporting and Planning
After each visit you receive a findings report with logged data, flagged deficiencies, and corrective recommendations so you can plan repairs and capital before they become emergencies.
Types of Systems We Install
Centrifugal Chillers
The workhorse of large NYC cooling plants, using a high-speed impeller to compress refrigerant for high-tonnage loads. Maintenance centers on tube cleaning, purge unit operation on low-pressure machines, bearing and oil health, and lift management.
- •High-tonnage central plant cooling
- •Eddy current tube testing and bundle cleaning
- •Purge unit service on low-pressure refrigerant machines
- •kW/ton and approach-temperature efficiency trending
Rotary Screw Chillers
Positive-displacement machines valued for reliability and part-load performance in mid-size commercial buildings. PM focuses on oil condition and separation, slide-valve and capacity control, bearing wear, and refrigerant charge.
- •Reliable mid-size and part-load operation
- •Oil analysis, oil and filter changes, and separator checks
- •Slide-valve and capacity-control verification
- •Bearing condition and vibration monitoring
Absorption Chillers
Heat-driven machines using a lithium bromide and water cycle, common where waste heat, steam, or gas is available and electrical demand must be limited. Maintenance emphasizes solution concentration, vacuum integrity, and crystallization prevention.
- •Steam, hot-water, or gas-fired heat-driven cooling
- •Solution sampling and concentration management
- •Vacuum integrity and leak checks
- •Crystallization prevention and purge service
Why NYC Buildings Choose Com+ Mechanical
Commercial Chiller Specialists
We work on the central plant every day: centrifugal, rotary screw, scroll, and absorption machines, water-cooled and air-cooled, on low- and high-pressure refrigerants. This is core work for us, not an occasional job.
Built for the NYC Metro
We serve the five boroughs, Nassau, Westchester, northern New Jersey, and Stamford, and we plan around city realities: rooftop and below-grade plant access, occupied tenant spaces, and Local Law 97 energy pressure.
Portfolio-Ready Programs
Whether you run one building or a portfolio, we standardize scope and reporting across sites so facilities teams get one consistent program, one schedule, and comparable data across every chiller.
Data-Driven, Not Guesswork
Eddy current testing, oil spectrometry, megohmmeter readings, and kW/ton trending mean our recommendations are backed by measurement, so you invest in the work the machine actually needs.
Transparent Pricing
No fees. No surprises. Just honest service.
Chiller Plant Assessment
A one-time diagnostic survey to baseline plant condition and define the right scope before committing to a program.
- On-site inspection of chiller, tubes, oil, controls, and electrical
- Operating-log and nameplate review with current readings captured
- Oil sample analysis and approach-temperature evaluation
- Written condition report with prioritized findings and program recommendations
Annual Chiller PM Program
Full scheduled preventive maintenance with seasonal startup and shutdown, tube cleaning, and complete inspection for your chiller.
- Spring startup and fall shutdown service
- Annual tube cleaning and eddy current testing
- Refrigerant, oil, electrical, and controls service per manufacturer interval
- Post-visit findings reports with logged data and recommendations
Multi-Building / Portfolio Agreement
A standardized program across multiple chillers or properties with consistent scope, scheduling, and reporting for facilities teams.
- Coordinated scheduling across every site and unit
- Standardized scope and comparable reporting across the portfolio
- Priority response for program accounts
- Consolidated efficiency and capital-planning data across buildings
All chiller maintenance pricing is scoped after an on-site plant assessment of your specific equipment, tonnage, and number of units and buildings.
Own a Commercial Property?
Business+ plans start at $499/year — includes 2 rtu tune-ups, 10% off all services, and priority scheduling.
Equipment & Brands We Service
Factory-trained technicians for all major HVAC manufacturers
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Frequently Asked Questions
Get answers to common questions about our services
How often should a commercial chiller be on a preventive maintenance schedule?
At minimum, a commercial chiller should receive a seasonal spring startup and fall shutdown plus an annual full inspection, with tube cleaning, oil service, and refrigerant and electrical checks performed on the manufacturer's interval. Higher-runtime plants and mission-critical buildings often benefit from additional in-season visits. We set the exact cadence during your plant assessment based on the machine, its load, and your occupancy.
Can you service chillers across a multi-building portfolio on one program?
Yes. We build portfolio agreements that standardize scope, scheduling, and reporting across every chiller and property you operate, so your facilities team manages one program with comparable data across sites instead of juggling separate vendors and inconsistent reports for each building.
Do you offer 24/7 emergency response for chillers on a maintenance program?
Yes, we provide 24/7 emergency support, and program accounts receive priority response when a plant goes down. The goal of the PM program itself is to make those calls rare by catching developing problems during scheduled visits.
How does chiller maintenance help with Local Law 97 and energy performance?
A fouled, undercharged, or poorly maintained chiller can run well above its design kW/ton, quietly inflating the building's energy use and emissions. By restoring heat-transfer surfaces, verifying charge, and trending efficiency year over year, our program keeps the chiller operating near design and gives you documented data that supports Local Law 97 benchmarking and reporting conversations.
What refrigerants and chiller types do you maintain?
We service water-cooled and air-cooled centrifugal, rotary screw, scroll, and absorption chillers on both low-pressure and high-pressure refrigerants, and all refrigerant work is handled per EPA Section 608 requirements. During the assessment we confirm your specific machine and refrigerant so the program scope matches your equipment exactly.
Do you provide proof of insurance and required documentation for building management?
Yes. We can provide a certificate of insurance and the documentation your building or property management requires before work begins, including service records that support warranty standing and the asset history.
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Put Your Chiller on a Program Before Cooling Season Peaks
An annual chiller PM program turns your most critical mechanical asset from an unpredictable liability into a planned, budgetable line item, with fewer emergencies, lower energy cost, and a cooling plant that stays online when your tenants need it most. Com+ Mechanical will assess your plant, scope a program built around your exact equipment, and keep every chiller in your portfolio running at design. Call (332) 600-4640 or request a maintenance proposal today.
Get a Maintenance Proposal