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Stay Comfy in Your OP13

This guide makes it easy to stay comfortable year-round on your off-road trips.

Stay Comfy in Your OP13

Beat the cold or heat with your OP13 2025’s Truma Combi Eco heater and Dometic Penguin II A/C! This in-depth guide provides detailed setup instructions, operational tips, maintenance advice, and safety considerations to keep you comfortable year-round on your off-road adventures. Based on the official 2025 OP13 Owners Manual (Pages 26 for Truma Combi, Page 14 for A/C), this guide ensures you can enjoy the compact 230” setup mode (70” x 60” main bed and 75” x 30” bunk) in any climate. Let’s dive into making your OP13 a cozy haven!

 

Setting Up and Using the Truma Combi Eco Heater

Initial Setup

  • Location: The Truma Combi Eco is installed in the front driver side storage compartment. 
  • Connections: Connect the propane cylinder to the quick-connect fitting (see Gas System Guide, Pages 24-25) and ensure the 12V electrical system is powered via the control panel. The unit requires the 3 x 135Ah lithium batteries to be above 12.2V.
  • Ventilation: Position at least one window or vent open during operation to prevent carbon monoxide buildup, a critical safety step in the OP13’s compact interior.

Turning On

  • Thermostat Reset: Locate the digital thermostat on the control panel. Hold the power button for 5 seconds until it beeps, indicating a reset. This clears any error codes from previous use.
  • Temperature Setting: Use the up/down arrows to set your desired temperature (e.g., 65°F for comfort). The unit will ignite the propane burner, and the fan will circulate warm air within 10-15 minutes.
  • Hot Water Mode: Switch to hot water mode via the thermostat’s mode button to heat the 2.6-gallon tank. Allow 15-20 minutes for full heating—ideal for showers or the kitchen sink.
  • Turning Off: Set the thermostat to “Off,” wait 2-3 minutes for the fan to cool the burner, and turn off the propane valve to prevent leaks.

Performance Details

  • Output: Delivers 14000-16000 BTU, heating the 130” x 112” setup space efficiently. A full propane cylinder (20 lbs) lasts 20-25 hours on low settings.
  • Efficiency Tips: Use a lower setting (e.g., 60°F) overnight to conserve propane, and pre-warm the camper before sleeping for better insulation.

Setting Up and Using the Dometic Penguin II A/C

Initial Setup

  • Installation: The A/C unit is roof-mounted with a 120V connection accessible via the exterior 30 Amp hookup. Ensure the mounting is secure and the exhaust vent is clear.
  • Power Requirements: Connect to shore power or a 2000W+ generator. The OP13’s electrical system supports this via the Victron MultiPlus 2000VA inverter, but direct 120V is preferred for A/C use.
  • Ventilation: Keep interior vents open and avoid blocking the condenser on the roof to maintain airflow.

Operating Modes

  • Cooling Mode: Turn on the A/C breaker on the control panel, set the thermostat to “Cool,” and select a temperature (e.g., 75°F). Cold air circulates within 5-10 minutes, ideal for hot days up to 95°F.
  • Heat Pump Mode: Switch to “Heat” (effective above 40°F) and adjust the fan speed (low/medium/high) for mild warmth. This is a supplementary heat source, not a primary heater.
  • Shutting Down: Turn off the breaker and thermostat, then disconnect power if moving to prevent strain on the system.

Performance Details

  • Capacity: The 13,500 BTU unit cools the OP13’s interior effectively in moderate climates. 
  • Efficiency Tips: Use cooling during peak heat (10 AM-4 PM) and switch to heat pump at dusk. Avoid running both heater and A/C simultaneously to prevent power overload.

Maintenance and Care

Truma Combi Eco Maintenance

  • Cleaning: Vacuum the exhaust vents monthly with a soft brush attachment to remove dust. Check the air intake filter every 3 months and rinse with water if clogged.
  • Servicing: Schedule annual professional servicing to inspect the burner, heat exchanger, and propane lines. Replace the anode rod in the water tank every 2 years to prevent corrosion.
  • Storage: Drain the water tank and turn off the unit during long storage to avoid sediment buildup.

Dometic Penguin II Maintenance

  • Filter Cleaning: Remove the filter monthly (accessible via the interior vent) and wash with mild soap and water. Let it dry completely before reinstalling to maintain airflow.
  • Condenser Care: Brush the roof condenser fins annually with a soft brush to remove debris, ensuring efficient heat dissipation. Check the mounting bolts for tightness.
  • Winterization: Cover the unit with a breathable A/C cover during off-season to protect against snow or leaves.

Safety Tips and Considerations

  • Truma Combi Eco Safety: Never operate without ventilation—CO poisoning can occur silently. Install the propane tank securely and test the CO/LP alarm before use. Avoid blocking vents with gear.
  • Dometic Penguin II Safety: Use only with stable 120V power to prevent motor burnout. Avoid running during heavy rain unless sealed properly, and ensure the roof is clear of snow or ice.
  • General Warnings: Monitor battery voltage (>12.2V) to power both systems. Disconnect power during thunderstorms to avoid surges. Keep the 1,000 lbs cargo limit to maintain balance.

Performance Optimization

  • Energy Management: Pair the Truma with the 4x 100-watt solar panels for off-grid heating, and use shore power for A/C.
  • Climate Adaptation: In humid areas, run the A/C on low to dehumidify; in cold climates, layer bedding with the heat pump for extra warmth.

Stay cozy year-round in your OP13 2025! Contact 925.215.7315 or info@opuscamper.us for support.