In-wall and ceiling-mounted WSHP systems
Water-Source Heat Pump Preventive Maintenance
Water-source heat pumps put a small heat pump in every apartment, guest room or zone, tied together by a building water loop. The loop gets attention from building engineering. The individual units, spread across every floor, usually do not — until a drain pan overflows into a ceiling below.
A-TAC provides scheduled preventive maintenance for WSHP inventories in multi-unit buildings, with a documented, repeatable scope per unit.
Typical WSHP preventive-maintenance scope
Scope is confirmed per property in the proposal. Everything performed is recorded unit by unit and summarized at property level.
- Standard filter replacement or service
- Drain pan inspection and cleaning
- Condensate drain cleaning and clearing
- Condensate pan treatment when appropriate
- Coil-condition inspection
- Blower and fan inspection
- Accessible strainer inspection and service where applicable
- Hose and connection leak inspection
- Cooling operation test
- Supply-air temperature
- Return-air temperature
- Temperature differential
- Noise and vibration assessment
- Thermostat and control operation
- Overall unit-condition assessment
- Documentation of deficiencies
What sits outside standard preventive maintenance
Standard PM keeps the unit clean, draining and operating, and tells you what condition it is in. Corrective work is quoted separately unless a proposal specifically includes it:
- Major strainer service
- Heat-exchanger cleaning
- Refrigerant-circuit repairs
- Motor, valve and control replacement
- Compressor work
- Other corrective repairs identified during service
In-wall units
In-wall or vertical-stack WSHP units sit in a closet or chase inside the apartment or guest room. Access is generally straightforward, but the work is occupant-facing: the technician is inside a living space, and drainage and cleanliness matter as much as performance.
Ceiling-mounted units
Ceiling-mounted WSHP units sit above hard or tile ceilings, often over corridors, bathrooms or closets. They take longer to service: ladders and lifts, access panels, drop cloths, and in some buildings limited clearance around the unit.
That additional access time is real, and we account for it in scheduling and in the proposal rather than discovering it on site. Where access is genuinely restricted, the condition report says so.
Why drainage leads the scope
The most expensive WSHP failures in multi-unit buildings are usually water events, not mechanical ones. A blocked condensate drain above a ceiling becomes a stained ceiling, a damaged apartment and a claim.
Drain pans, condensate lines and pan treatment carry weight in our standard scope for exactly that reason.
Properties we do this work in
Apartment buildings and residential properties operating PTAC, VTAC, WSHP or mini-split systems.
Building-wide preventive-maintenance programs and equipment condition reporting.
Hotels, extended-stay and other lodging properties operating large inventories of guest-room HVAC units.
Related reading
Ready to see the condition of your HVAC inventory?
Tell us the property, equipment types and approximate unit count. We'll propose an assessment or a maintenance program that fits.