Burner Sequence Controller Rmg88.62c2, Supply voltage: 230 V AC

Product Details

The Siemens RMG88 (specifically the RMG88.62C2) is a microprocessor-based burner control unit designed for the startup and supervision of multi-stage or modulating gas burners. It is part of the "RMG" family, often found in high-end industrial burners like Riello. 1. Technical Specifications The RMG88 is known for its high-performance electronic sequence control, replacing older mechanical controllers with digital precision. Parameter Specification Mains Voltage $230\text{V AC}$ ($+10\% / -15\%$) Frequency $50\dots 60\text{ Hz}$ ($\pm 6\%$) Power Consumption Approx. $20\text{ VA}$ Safety Time ($TSA$) $3$ seconds (Standard) Pre-purge Time ($t_1$) $20$ seconds Protection Class IP20 (must be cabinet mounted) Flame Monitoring Ionization probe or UV Detector (QRA series) Operating Temp $-20\text{°C}$ to $+60\text{°C}$ 2. Key Features Linkage or Modulating Control: The RMG88 can manage actuators for air and gas, ensuring the correct ratio during startup and the modulation phase. Undervoltage Protection: The unit monitors the line voltage and will initiate a safety shutdown if the power drops below a critical threshold (approx. $180\text{V AC}$), preventing erratic valve behavior. Status Indicator: It features a multicolor LED in the reset button that provides real-time feedback (Green for OK, Yellow for startup, Red for fault). Valve Proving System (VPS): Most RMG88 models include an integrated program for checking the tightness of the gas valves before each burner start. 3. Terminal Layout (Common) The RMG88 uses a plug-in base. While wiring can vary by burner manufacturer (like Riello), the standard logic is: Terminals 1 & 2: Power Supply ($L$ and $N$). Terminal 3: Burner Motor / Fan. Terminal 6: Ignition Transformer. Terminal 7 & 8: Fuel Valves (Stage 1 and 2). Terminal 12: Air Pressure Switch signal. 4. Diagnostics & Fault Codes When the RMG88 locks out (Solid Red Light), you can read the "Blink Codes" by holding the reset button for more than 3 seconds: Blink Count Fault Meaning 2x No flame detected at end of safety time ($TSA$). 3x Air pressure failure (switch didn't close or opened during run). 4x Extraneous light (flame signal detected during pre-purge). 7x Loss of flame during operation. 10x Internal error or wiring fault. 5. Typical Suffixes RMG88.62C2: The most common industrial version. Riello Branding: You will often see this controller labeled as Riello RMG88.62C2 because it is a standard component in their gas burner trains.