Siemens RMO88.53C2 Sequence Controller

Product Overview

The Siemens RMO88.53C2 is an electronic burner control unit engineered for intermittent operation in forced-draft oil burners. It manages the entire firing sequence, including the fan motor, ignition transformer, and oil valves, while providing continuous flame monitoring. Its microprocessor technology ensures that all timings remain stable regardless of ambient temperature or voltage fluctuations, making it a highly reliable choice for industrial heating applications.

Technical Specifications

Feature: Technical Data

Product Model: Siemens RMO88.53C2

Operating Voltage: AC 220 V – 240 V

Frequency: 50...60 Hz

Pre-purge Time ($t_1$): 20 Seconds

Safety Time ($t_{TSA}$): 5 Seconds

Pre-ignition Time ($t_3$): 2 Seconds

Degree of Protection: IP40

Application: Riello 2-Stage / Modulating Oil Burners

Key Features

Microprocessor Logic: Provides digital precision for all sequence timings, significantly reducing the risk of timing drift over the life of the controller.
Multicolor LED Indicator: Features a built-in visual diagnostic system that communicates operational status and specific fault codes (e.g., ignition failure, air pressure loss).
Undervoltage Protection: Automatically triggers a safety shutdown if the power supply drops below the functional threshold, protecting the burner components.
Flame Supervision: Optimized for use with QRB... photo-resistive sensors to ensure rapid flame detection and fail-safe operation.
Direct Riello Integration: Specifically designed for seamless compatibility with Riello RL and RS series oil burner control panels.