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• Model Number: 8200-1501
• Controller Type: Digital microprocessor-based HVAC controller
• Supply Voltage: 24 V AC ± 10%, 50/60 Hz
• Power Consumption: Less than 15 VA
• Operating Temperature: 0°C to +50°C
• Storage Temperature: -25°C to +70°C
• Humidity Range: 5% to 95% relative humidity, non-condensing

Key Features

• HVAC‑Optimized Control: Dual PID dynamics for speed/load and cascade PID for chiller/boiler pressure/flow control to match thermal demand.
• 5” Graphical HMI: Displays setpoint/actual values, trends, and alarms on one screen; 8‑button keypad for local configuration.
• Bumpless Mode Transfers: PID‑to‑PID logic ensures stable transitions between speed, load, and cascade modes during HVAC load swings.
• Overspeed Protection: Peak speed indication, overspeed test capability, and initial valve limiter to prevent turbine damage during start‑up.
• Critical Speed Avoidance: 1 configurable speed band (100–10,000 rpm) to bypass resonant frequencies and reduce vibration.
• Redundant Speed Sensing: Accepts 2 magnetic speed sensors for fail‑safe operation in critical HVAC systems.
• First‑Out Alarm Logging: Captures 100+ time‑stamped events to speed troubleshooting of shutdowns (e.g., overspeed, high bearing temp).
• Modbus Integration: Dual Ethernet (Modbus TCP) and serial (Modbus RTU) ports for seamless BMS/DCS connectivity.
• Sulfur‑Resistant Coating: Polyacrylate coating protects PCBs from corrosive HVAC environments (ISA S71.04 G2).