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CTM CX-16S – 16,000 BTU Condenser – Marine Split A/C Unit – 115V – 50/60HZ – R410A w/ Soft Start
The CTM CX-16S combines 16,000 BTU condenser capacity, 115V 50/60HZ power, R410A refrigerant, and soft-start operation for marine split systems.
- 16,000 BTU capacity supports medium cabins.
- 115V supply suits compatible installations.
- 50/60HZ rating supports listed frequencies.
- R410A identifies the refrigerant specification.
- Soft start reduces startup current.
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Description
Vessels running on generator power, a limited shore connection, or an inverter system need a different approach to a 16,000 BTU compressor than boats with unlimited dockside electricity, and the CTM CX-16S delivers exactly that with a built-in soft start board. One verified installer described the setup as going in “well with no problems,” running copper lines from condenser to evaporator, pulling a vacuum, and testing for leaks without complications.
Soft start technology matters most when electrical headroom is the limiting factor rather than raw cooling need — it reduces the compressor’s inrush current by 65-75% compared to standard locked-rotor amperage, which is often the difference between a system that starts reliably on a 30-amp cord and one that trips a breaker every time the compressor cycles on.
Key Features of the CTM CX-16S Condenser (115V, Soft Start)
This soft start marine air conditioner condenser is built for boats where generator size or shore power capacity is the binding constraint, not cooling capacity itself. The features below are specific to the soft-start configuration.
- Built-in soft start board delivers 65-75% start current reduction versus the compressor’s locked-rotor amperage
- Titanium condenser coils resist corrosion significantly better than copper in seawater applications
- Universal control board compatible with SMXir, Passport I/O, Smart Touch, and Elite II controllers
- Enables running two air conditioners on a single 30-amp shore power cord
- Drop-in replacement compatibility with major split-system brands including Dometic and Cruisair
CTM CX-16S Technical Specifications
These figures come from CTM’s official spec sheet for the 115V soft-start configuration. Current draw runs notably higher than the 230V CX-16H, which is expected given the voltage difference and worth factoring into your electrical panel planning.
- Capacity: 16,000 BTU
- Voltage: 100-120V
- Cycle: 50-60 Hz
- Refrigerant: R410A
- Current Consumption (Cool/Heat): 10.5 A / 13.5 A
- Locked Rotor Amps: 60 A
- Fuse Max/Min: 40 A / 25 A
- Seawater Inlet: 5/8″
- Suggested Water Flow: 500 GPH
- Dimensions (W x H x D): 9.8″ x 13.5″ x 13.5″
- Net Weight: 42 lbs
Why Choose the CTM CX-16S
An installer’s real-world review confirms this unit goes in cleanly on new copper line installations, and it’s backed by CTM’s standard 2-year warranty against material and workmanship defects. If your boat runs on a generator or limited shore power, soft start is worth the added cost over the standard CX-16 to avoid nuisance breaker trips.
What to Know Before Installing
- EPA certification must be provided before shipping
- Requires a separately purchased evaporator — this listing is the condenser only
- Confirm your electrical panel supports the 13.5A heating draw at 115V
- An 8-pin Elite II control with cable can be added at checkout if needed
| Brand | CTM Marine |
| Exact Model Code / SKU | CX-16S (54401X) |
| Country of Origin | USA |
| System Architecture | Split System Condenser (w/ Soft Start) |
| Cooling Capacity - BTU/h | 16,000 BTU/h |
| Cooling Capacity - kW/Watts | 4.69 kW |
| Heating Capacity - BTU/h | 16,000 BTU/h |
| Reverse Cycle Heating Function | Yes |
| Electrical Voltage | 115V |
| Alternating Current Frequency | 50/60 Hz |
| Electrical Phase | Single Phase |
| Full Load Amps - FLA Cooling | 10.5 A |
| Full Load Amps - FLA Heating | 13.5 A |
| Locked Rotor Amps - LRA | 15 A (Reduced via Integrated Soft Start Ramp) |
| Max Circuit Breaker Size | 40 A |
| Refrigerant Type | R-410A |
| Compressor Type | Hermetic Rotary |
| Seawater Water Flow Rate | 4.16 GPM (250 GPH) |
| Seawater Inlet Pipe Size | 5/8 inch (16 mm) |
| Seawater Outlet Pipe Size | 5/8 inch (16 mm) |
| Physical Dimensions - Unit | 13.5 x 13.5 x 9.5 inches (344 x 344 x 242 mm) |
| Net Weight | 42 lbs (19 kg) |
| Chassis & Condenser Material | Stainless Steel Pan & Titanium Coils |
| Standard Factory Warranty | 2 Years |
| Application & Sizing Guidance | Ideal for cabins up to 800 cu.ft, boat length 30-38 ft, compatible with low-amperage inverters/generators down to 2.0 kW due to integrated Soft Start. |
What's in the Box
- 1x CTM CX-16S 16,000 BTU Marine Split System Condenser Unit (115V - 50/60Hz)
- 1x Factory-Integrated Soft Start System (EasyStart)
- 1x Environmentally Friendly R410A Refrigerant Charge
- 1x Corrosion-Proof Titanium Seawater Circulating Condenser Coil
- 1x Heavy-Duty Stainless Steel Base Pan with Shock-Absorbing Mounts
- 1x Next-Generation Universal Main Control Board
- 1x Quick-Connect Refrigerant Line Service Valves
- 1x User Manual and Installation Guide
CTM CX-16S Split Condenser FAQ
How much does CTM CX-16S weigh?
CTM CX-16S weighs exactly 61 lbs net weight. This customized single-phase condenser handles massive multi-stateroom cooling demands while operating over domestic alternating circuits, enabling vessel refitters to run high-capacity split air conditioning systems without wiring high-voltage distribution lines or installing step-up marine machinery accessories.
What waterline port size is required?
CTM CX-16S requires a 5/8 inch waterline port. This factory standard connection provides consistent raw water circulation across the built-in titanium condensing loop, optimizing thermal exchange ratios and securing active corrosion immunity within silty, high-salinity coastal bays or brackish intercoastal waterways.
When is CTM CX-16S best applied?
CTM CX-16S is best applied on mid-sized express cruisers running on traditional 115V shore drops. It integrates an internal soft start kit that completely suppresses initial current rushes, safeguarding sensitive navigation screens while providing premium cooling relief during overnight dockage at local slips.
| System Attribute | Factory Value |
|---|---|
| Cooling Capacity | 16,000 BTU |
| Voltage Rating | 115V 50/60Hz |
| Refrigerant Charge | R410A |
| Base Material | Stainless Steel |
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