Can the pump stay primed?
A dedicated intake, reachable strainer and continuously rising run to the pump reduce air locks and make the daily flow check obvious.
Diagnose lost flowMarine Air Conditioning Installation Guide
The unit is only one part of the job. Cooling water, air paths, condensate, electrical supply and service access decide how quietly it runs, how well it dries the cabin and how painful it is to own.
01
Survey the Boat Before Installing Air Conditioning
Measure the cabin volume and glass, decide which doors will be open at night, note the climate and record the shore-power limit. Then find a dry, accessible space for the unit before choosing its capacity. A larger machine cannot correct a starved return grille, warm seawater or a crushed duct; it can make humidity control worse by cooling the air too quickly and stopping before enough moisture has drained away.
Can the blower breathe?
Short, smooth ducting and a generous return path usually buy more usable cooling and less noise than the next model up.
Plan the airflowWhere does the water go?
The tray needs continuous fall to a suitable sump or drain, with no low pocket to hold stale water when the boat heels.
Control condensateWhat else shares the lead?
Assess running current and compressor starting demand beside the charger, hot-water service, galley loads and inverter limits.
Build a power budgetCan it be serviced in place?
Filters, strainers, electrical covers, drains and hose clamps should be reachable without removing furniture or the machine.
See recurring jobsWhere will temperature be sensed?
Keep the sensor out of the cold supply stream and away from a sun-heated bulkhead; otherwise the controller reads the duct or joinery, not the cabin.
Understand short cycling02
Marine Air Conditioning Installation Planning Steps
The right sequence fixes physical constraints before cabinetry closes around them. Treat the diagram as a design gate: do not move forward until the previous answer is plausible on the actual boat.
- 1LoadSize each cabin and climate
- 2RoutesProve water, duct and drain paths
- 3PowerCheck shore lead, circuit and inverter
- 4AccessReserve service clearances
- 5InstallUse licensed trades where required
- 6ProveRecord flow, current, temperature and drain
Start with the boat sizing guide, then compare the result with the installed-cost model. Product selection belongs after the routes and power budget, not before them.
03
Commissioning and Handover Checks
A handover should leave baseline numbers that make later diagnosis possible. Ask for the exact model and serial number, controller manual, breaker and shore-supply requirements, refrigerant type, seawater flow observation, running current, return and supply-air temperatures, and confirmation that condensate drains with the boat at rest.
| Record | Why keep it | Check again when |
|---|---|---|
| Model, serial and manuals | Matches parts, fault codes and electrical data to the installed revision | Buying parts or changing technicians |
| Running current | A rise can point to lost water flow, voltage problems or mechanical load | The breaker trips or performance falls |
| Return/supply temperature | Provides a repeatable performance baseline under known conditions | The cabin feels slower to cool |
| Overboard flow | Shows what a healthy discharge looks like on this boat | Every start and after a haul-out |
| Drain test | Confirms water leaves the tray instead of the furniture or bilge | Musty odour or unexplained water appears |
Safety boundary. This is planning information, not instructions for opening a refrigerant circuit, cutting a through-hull or performing fixed 240 V work. Advice can be wrong or incomplete. Read the full disclaimer, verify the exact equipment manual and use appropriately licensed people.
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Bird Electrical Marine Electrical, Air Conditioning and RefrigerationTerrey Hills, NSWMarine electrical · Marine electronics · Navigation electronics · Marine refrigerationView provider and contact details →Bird Electrical Marine Electrical, Air Conditioning and RefrigerationBrooklyn, NSWMarine electrical · Marine electronics · Navigation electronics · Marine refrigerationView provider and contact details →Electech IndustriesManly, QLDMarine electrical · Marine electronics · Marine communications · Marine refrigerationView provider and contact details →NEWPORT MARINE ELECTRICALNewport, NSWEngine service · Marine electrical · Marine electronics · Marine refrigerationView provider and contact details →Sydney Marine ElectricalDrummoyne, NSWMarine electrical · Marine electronics · Marine refrigeration · WatermakersView provider and contact details →
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