Dometic 641816CXX1J0
Dometic Penguin II Rooftop Air Conditioner User Manual
Model: 641816CXX1J0 | Brand: Dometic
1. Product Overview
The Dometic Penguin II is a high-efficiency, low-profile rooftop air conditioner designed for recreational vehicles (RVs). Its sleek, aerodynamic design reduces wind resistance, contributing to improved fuel efficiency. This unit provides premium comfort control through a high-performance motor and fan, ensuring effective cooling for your mobile living space.

Figure 1: Dometic Penguin II Rooftop Air Conditioner, main view.
2. Key Features
- Sleek, Low-Profile Design: Improved aerodynamics reduce wind resistance and contribute to smoother movement while the vehicle is underway.
- Lightweight Construction: The EPP foam housing reduces the overall weight of the unit while enhancing cooling efficiency.
- Eco-Friendly Refrigerant: Utilizes R410A refrigerant, which is efficient in heat reduction and has a lower environmental impact.
- Premium Comfort: Equipped with a high-performance motor and fan for maximum cooling capacity, ensuring a comfortable indoor environment.
- Lasting Strength: Features a rib-reinforced base pan designed for enhanced strength and durability, capable of withstanding various weather conditions.
- Compatibility: This cool-only rooftop unit is designed to work with either CCC2 or CT single or multi-zone thermostats. Note that controls are not pre-installed and additional hardware is required for full operation.

Figure 2: Key design features of the Dometic Penguin II, highlighting its low profile, high-performance design, and lasting strength.

Figure 3: Visual representation of the unit's high-performance cooling capabilities and benefits.
3. What's in the Box
The package for the Dometic Penguin II 13.5K BTU Rooftop Air Conditioner includes:
- One (1) Dometic Penguin II 13.5K BTU High Capacity Low Profile Rooftop Air Conditioner unit (Polar White).
- This unit is suitable for both ducted and non-ducted applications.
Note: Additional installation hardware and thermostat controls are sold separately and are required for full operational functionality.
4. Setup and Installation
Installation of the Dometic Penguin II rooftop air conditioner requires careful attention to detail and adherence to safety guidelines. It is highly recommended that installation be performed by a qualified technician to ensure proper function and safety.
4.1 Pre-Installation Checks
- Verify roof opening dimensions (standard 14" x 14" opening).
- Ensure adequate structural support on the RV roof for the unit's weight (approximately 99 lbs).
- Confirm electrical supply meets the unit's requirements (115 Volts, 410 Amps, 3956 Watts).
- Acquire the necessary Dometic CCC2 or CT thermostat and associated control hardware, as these are not pre-installed.
4.2 Mounting the Unit
The unit is designed for rooftop mounting. Ensure the gasket is properly seated to create a watertight seal. Secure the unit to the roof using the appropriate mounting hardware (not included with the unit). The rib-reinforced base pan provides a stable mounting platform.

Figure 4: Rear view of the Dometic Penguin II unit, showing the robust construction for mounting.
4.3 Electrical Connection
Connect the unit to the RV's electrical system according to the wiring diagram provided in the comprehensive installation manual (sold separately or available from Dometic). Proper grounding is essential for safety.
4.4 Thermostat and Control Installation
Install the chosen Dometic CCC2 or CT thermostat and its control box inside the RV. Follow the specific instructions provided with the thermostat for wiring and setup. This unit is 'cool only' and does not include heating elements.
5. Operation
Once properly installed and connected to a compatible Dometic thermostat, operating the Penguin II air conditioner is straightforward.
5.1 Cooling Function
- Turn on the air conditioner via your Dometic thermostat.
- Select the desired temperature setting. The unit will cycle on and off to maintain this temperature.
- Adjust fan speed as needed (typically High, Medium, Low, or Auto, depending on thermostat model).
5.2 Airflow Management
Ensure that the air vents inside your RV are open and unobstructed for optimal airflow and cooling distribution. The unit's high-performance fan is designed to deliver superb cooling performance throughout your RV.
6. Maintenance
Regular maintenance helps ensure the longevity and efficient operation of your Dometic Penguin II air conditioner.
6.1 Filter Cleaning
- Periodically clean or replace the air filter located in the indoor air distribution box. A dirty filter can restrict airflow and reduce cooling efficiency.
6.2 Exterior Cleaning
- Keep the exterior of the rooftop unit clean from debris, leaves, and dirt. This ensures proper heat dissipation from the condenser coils.
6.3 Seasonal Checks
- Before and after periods of extended storage, inspect the unit for any visible damage, loose connections, or signs of wear.
- Check the mounting bolts for tightness.
7. Troubleshooting
This section addresses common issues you might encounter with your Dometic Penguin II air conditioner. For more complex problems, consult a qualified RV service technician.
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not turn on. | No power supply; tripped circuit breaker; faulty thermostat. | Check RV's circuit breaker; ensure shore power is connected; verify thermostat settings and connections. |
| Insufficient cooling. | Dirty air filter; obstructed condenser coils; low refrigerant; incorrect thermostat setting. | Clean or replace air filter; clear debris from rooftop unit; ensure thermostat is set to a low enough temperature. For refrigerant issues, contact service. |
| Unusual noise from unit. | Loose components; fan obstruction; motor issue. | Inspect for loose parts or debris in the fan area. If noise persists, professional inspection is recommended. |
8. Specifications
| Attribute | Detail |
|---|---|
| Model Number | 641816CXX1J0 (also 9105304179) |
| Cooling Capacity | 13,500 BTU (1.13 Tons) |
| Voltage | 115 Volts |
| Amperage | 410 Amps |
| Wattage | 3956 Watts |
| Item Weight | 99 pounds |
| Product Dimensions (L x W x H) | 40 x 29 x 9.5 inches (Unit dimensions) / 42.5"D x 29.75"W x 12.75"H (Overall dimensions) |
| Noise Level | 1 Sones |
| Refrigerant Type | R410A |
| Application | Rooftop, Ducted or Non-Ducted |
| Color | Polar White |

Figure 5: Dimensional diagram of the Dometic Penguin II unit.
9. Warranty and Support
For detailed warranty information regarding your Dometic Penguin II air conditioner, please refer to the official warranty documentation provided with your purchase or visit the official Dometic website. Dometic offers customer support for product inquiries, technical assistance, and service needs.
You can find more information and contact Dometic support through their official store page: Visit the Dometic Store on Amazon.
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