Purchase now: Pfannenberg 17099615030 FLZ 530 Twin Thermostat
Purchase now: Atlantech Drives provides you the Pfannenberg 17099615030 (Model: FLZ 530), a versatile Twin Thermostat designed to independently control both heating and cooling equipment within the same electrical enclosure. In environments with wide temperature fluctuations—such as outdoor kiosks, telecommunications cabinets, or unheated warehouses—managing the internal climate is a complex balancing act. The FLZ 530 solves this by combining two separate mechanical thermostats into a single, compact housing, ensuring your cabinet stays within the safe operating window 24/7 preventing both condensation and overheating.
Technical Specifications and Dual Functionality
The FLZ 530 is equipped with two distinct color-coded dials, each controlling a snap-action contact. This design allows for precise, independent setup of your climate control strategy:
- NC Contact (Red Dial – Normally Closed): Controls Heaters. It opens the circuit when the temperature rises above the setpoint (e.g., set to 10°C to prevent freezing). If the temperature drops below this, it activates the heater to eliminate condensation risks.
- NO Contact (Blue Dial – Normally Open): Controls Filterfans or Heat Exchangers. It closes the circuit when the temperature rises above the setpoint (e.g., set to 35°C), activating the cooling unit to dissipate waste heat from VFDs and PLCs.
Key Technical Data:
- Part Number: 17099615030.
- Model: FLZ 530 Twin Thermostat.
- Setting Range: 0°C to +60°C.
- Switching Capacity: 240 V AC / 10 A (Resistive Load).
- Sensor Element: Thermostatic Bimetal.
- Hysteresis: Approx. 7 K (Switching difference).
- Mounting: Snap-on fastening on 35mm DIN Rail (EN 60715).
- Housing Material: UL 94 V-0 Plastic, Light Gray (RAL 7035).
- Protection: IP 20.
Expert Installation Advice: The «Dead Band» Strategy
A critical error in installing twin thermostats is overlapping the setpoints. Expert Tip: You must establish a thermal «Dead Band» or neutral zone. Never set the heater (Red) and fan (Blue) to the same temperature. For example, set the Heater to turn off at 15°C, and set the Fan to turn on at 40°C. This creates a 25-degree safety gap where neither device runs. This strategy saves massive amounts of energy and prevents the heater and fan from fighting each other (short-cycling), which would wear out the components prematurely.
Frequently Asked Questions (FAQs)
Q: Can I switch DC loads with this thermostat?
A: Yes, the FLZ 530 can switch DC loads (max 30W is typical for DC). However, ensure you verify the DC arcing characteristics for your specific voltage, or use an interposing relay for higher DC currents.
Q: Where should I mount this in the cabinet?
A: Install the FLZ 530 in the upper third of the cabinet, as far away as possible from the direct heat source (e.g., braking resistors) and away from the direct airflow of the fan, to ensure it measures the true ambient air temperature.
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