Vitronics Soltec ITW Reflow Soldering Heat Exchangers C200081 L60319 L60320
Vitronics Soltec ITW Reflow Soldering Heat Exchangers (C200081, L60319, L60320)
These three are universal hot air circulation/cooling heat exchangers for MR933/MR1243 reflow soldering and Delta5 wave soldering (original 7-C series, ITW Vitronics). They are primarily used for hot air circulation, temperature control, and heat dissipation in the preheating/cooling zones. Below are the precise specifications, compatibility, and replacement options:
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I. Core Models and Specifications (Original 7-C Standard)
1. C200081 (Most Universal, Main Heat Exchanger)
Original Complete Number: 7-C200081 / C200081
Material: All-aluminum brazed finned tubes (AL1050), high temperature resistant, corrosion resistant, oxidation resistant
Dimensions: 122×208×735 mm (Length × Width × Height)
Connections: 2 inlets, 2 outlets, Φ16mm quick-connect / 1. Flange, compatible with hot air fan (C400072 motor)
Compatible with: MR933 (9 zones), MR1243 (12 zones) reflow soldering; Delta5/Delta3 wave soldering
Applications: Hot air circulation in the preheating zone, main heat exchange in the cooling zone, closed-loop temperature control
2. L60319 (Left / Auxiliary heat exchanger in the cooling zone)
Original part number: 7-L60319 / L60319
Material: Aluminum fins + stainless steel tube
Dimensions: 110×190×680 mm
Interface: Φ14mm, single-sided inlet and outlet
Compatible with: MR1243 12-zone reflow soldering cooling section, MR933 extended cooling zone
Applications: Auxiliary cooling, zoned temperature control, reducing outlet PCB temperature
3. L60320 (Right / Auxiliary heat exchanger in the preheating zone)
Original part number: 7-L60320 / L60320
Material: Aluminum fins + Stainless steel tube
Dimensions: 110×190×680 mm (Symmetrical with L60319, left and right distinguished)
Interface: Φ14mm, single-sided air inlet/outlet
Compatible with: MR933/MR1243 preheating zone end, Delta5 preheating section
Applications: Preheating zone supplementary heating, hot air homogenization, temperature stabilization
Model Comparison Table
Table Original Part Number Type Size (mm) Material Compatible Models Core Application
7-C200081 Main Heat Exchanger 122×208×735 All-aluminum brazed MR933/MR1243, Delta5 Main hot air circulation, cooling / preheating main heat exchanger
7-L60319 Left Auxiliary Heat Exchanger 110×190×680 Aluminum fins + Stainless steel MR1243 Cooling, MR933 extension Auxiliary cooling section, zoned cooling
7-L60320 Right auxiliary heat exchanger 110×190×680 Aluminum fins + Stainless steel MR933/MR1243 Preheating Preheating supplementary heating, uniform hot air
II. Compatibility and Installation Points (Must be checked)
Model Matching
MR933 (Zone 9): Standard configuration 1×C200081 + 1×L60320 (Right preheating)
MR1243 (Zone 12): Standard configuration 1×C200081 + L60319 (Left cooling) + L60320 (Right preheating)
Delta5 Wave Soldering: Only C200081 (Preheating Hot Air Circulation)
Installation Differentiation:
L60319 (Left), L60320 (Right): Left and right are not interchangeable; interface direction and mounting hole positions are symmetrical.
C200081: Centered installation, connected to the main hot air motor (C400072); air inlet and outlet directions are fixed.
Maintenance Cycle:
Normal operation: Clean fins (compressed air purging) every 6–12 months.
Severe contamination (flux/dust): Replace every 3–6 months to prevent blockage leading to temperature drift and over-temperature alarms.
III. Fault Diagnosis and Replacement Recommendations
Common Faults:
Over-temperature/unstable temperature, low hot air volume, motor overload → heat exchanger fin blockage, air leakage, corrosion perforation
Cooling zone PCB temperature too high → L60319 failure
Slow preheating zone temperature rise → L60320 or C200081 blockage
Replacement Priority:
Priority: Original C200081 + Original L60319/L60320 (Long-term stable)
Secondary Choice: Branded alternative of the same size (high cost-performance ratio, fast delivery)
Emergency: Domestic alternative (short-term use, replace with original as soon as possible)
IV. Installation and Wiring Precautions
Before Installation: Clean the air duct and check that the fan (C400072) is operating normally.
Sealing: Use high-temperature resistant silicone/sealing gaskets for the interfaces to prevent air leakage (affecting heat exchange efficiency).
Direction: Strictly follow the original factory markings (IN/OUT) for installation; reverse installation will cause heat exchange failure and overheating.