DAIKIN INDUSTRIES LT3030A-10 Oil cooler (300L/min, 829 x 205mm)

Daikin Industries LT3030A-10 Oil Cooler (300 L/min, 829 × 205mm) - In-Depth Technical Guide and FAQ:

1/ Product Overview

The LT3030A-10 is a water‐cooled oil cooler designed by Daikin Industries for lubrication, hydraulic drive, and compressor cooling systems. It delivers a maximum oil flow of 300 L/min while requiring only a modest cooling water flow. Freedoms in installation and robust construction make it suitable for diverse industrial environments.

2/ Construction and Materials

This oil cooler features copper heat exchanger tubes brazed to spiral fins, providing excellent thermal conductivity and corrosion resistance. The spiral‐fin design agitates the oil to enhance turbulent mixing and heat transfer efficiency. Legs welded directly to the frame allow secure mounting and vibration resistance.

3/ Working Principle

Oil flows through internal copper tubes while cooling water passes around the brazed spiral fins. Heat from the oil conducts through the tube walls into the fins, where the water absorbs it. The spiral fins induce a swirling motion that maintains high turbulence, maximizing the thermal exchange between oil and water without manual adjustment of flow paths.

4/ Installation Guidelines

- Ensure clearances around the cooler for airflow and maintenance access.

- Position the cooler so that the water inlet sits below the outlet to facilitate automatic air release.

- Weld the integrated legs securely to the machine frame or base to withstand operational vibrations.

- Connect oil and water lines using pressure‐rated fittings compatible with 300 L/min oil flow.

-Install an air‐bleed valve at the highest fin channel point to purge trapped air.

5/ Operation Guidelines

- Pre‐fill the fin channels with cooling water via the bleed valve before starting the system.

- Simultaneously start the oil pump and cooling‐water supply, monitoring pressure and flow rates.

- Measure inlet and outlet oil temperatures to verify cooling performance; adjust water flow as needed.

- Avoid dry operation of either circuit; ensure continuous oil and water circulation.

- After shutdown, run the water pump briefly to dissipate residual heat from the fins.

6/ Cooling Water Quality & Performance

To prolong cooler life and maintain performance, cooling water quality must meet industrial standards for hardness, pH, and suspended solids. Poor water quality accelerates fin fouling and corrosion. Regular monitoring of flow rate, temperature, and water chemistry is recommended to ensure consistent heat exchange efficiency.

7/ Maintenance & Care

- Daily or per‐shift: rinse fins with clean water to remove oil deposits and debris.

- Every 3 - 6 months: inspect brazed joints and piping for leaks; replace degraded seals.

- Replace cooling water periodically and add corrosion inhibitors if using reclaimed or construction water.

- Tighten weld‐mounted legs and pressure fittings to prevent vibration-induced loosening.

- Immediately repair or re‐brazing any leaks in tube‐to‐fin joints to avoid cross-contamination.

8/ Frequently Asked Questions (FAQ)

8.1/ Can I use seawater as the cooling medium?

No. The cooler is rated only for fresh water or construction water to prevent salt‐induced corrosion.

8.2/ What is the optimal water flow relative to oil flow?

Aim for a water flow of 1.2 - 1.5 times the oil flow (360 - 450 L/min) for maximum thermal performance.

8.3/ How do I purge air from the fin channels?

Open the bleed valve at the fin’s highest point until water flows steadily without air bubbles.

8.4/ Is orientation critical during installation?

No. Thanks to 360° mounting flexibility, the cooler can be oriented to suit space constraints.

8.5/ How often should I replace the cooling water?

Replace every 3 - 6 months or sooner if water quality tests indicate elevated hardness, pH drift, or high particulates.

8.6/ What causes reduced cooling efficiency?

Common causes include fin fouling, low water flow, corrosion, or air trapped in the channels.

8.7/ How do I inspect for internal leaks?

Perform a pressure test on the oil and water circuits separately, monitoring for pressure drop over time.

8.8/ Can the cooler handle variable flow rates?

Yes, but maintain minimum flows to avoid dry‐out of tubes or fins, which can lead to overheating and damage.

8.9/ Are spare parts available? Standard spare parts such as bleed valves, end caps, and fin assemblies can be sourced through distributors as QTE Technologies (qtetech.com/en).