Siemens Building Technology 134-1504 Thermostat
The Siemens Building Technology 134-1504 is a heavy-duty, 4-wire 2-circuit electric low temperature detection thermostat designed to protect hydronic coils and heat exchangers from localized freezing. This 15/55°F range controller features a DPST switch action and a 20-foot copper capillary element, ensuring that if any one-foot section of the bulb senses temperatures below the manual reset setpoint, the circuit trips to shut down fans or close dampers. Engineered for HVAC freeze protection in high-stratification environments, the 134-1504 freeze stat provides a fixed 5°F differential and is rated for both 120V and 240V AC applications. The remote bulb thermostat design allows for precise serpentine mounting across large coil faces, delivering the reliability required for critical commercial HVAC controls. Contractors typically utilize this double-pole single-throw unit to simultaneously stop supply fans and trigger remote alarm circuits during a low-limit event.
Key Benefits- Comprehensive Coil Coverage: The 20-foot vapor-filled capillary detects low-temperature conditions along any single foot of the sensing element.
- Dual Circuit Reliability: The 4-wire 2-circuit DPST configuration enables simultaneous fan shutdown and alarm notification.
- Adjustable Range: Provides a 15 to 55 degree Fahrenheit setpoint range with a concealed high-limit stop to prevent tampering.
- Robust Construction: Features an electroplated copper bulb for maximum sensitivity and a durable metal housing for mechanical longevity.
- Universal Compatibility: Includes a universal mounting bracket for easy integration into existing air handling units and ductwork.
How do you wire the Siemens 134-1504 for fan shutdown?
In a typical 4-wire setup, the main contacts are wired in series with the fan starter coil or HVAC control circuit. When the capillary senses a temperature drop to the setpoint, the DPST switch opens the fan circuit and closes the auxiliary alarm circuit. Since this is a manual reset thermostat, an operator must physically push the reset button once temperatures rise above the 5°F differential.
Where should the 20-foot capillary bulb be installed?
For effective low temperature detection, the capillary should be mounted in a serpentine pattern on the downstream side of the heating or cooling coil. Use the included perforated strap hangers to ensure the bulb covers the entire air stream, specifically targeting areas where air stratification might occur.
Can the 134-1504 be used for high-voltage switching?
Yes, the Siemens 134-1504 is rated for line voltage applications, capable of switching up to 16 Amps at 120V or 240V AC, making it suitable for direct control of small motors or as a pilot duty device for larger contactors.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Siemens Building Technology 134-1504 Thermostat
The Siemens Building Technology 134-1504 is a heavy-duty, 4-wire 2-circuit electric low temperature detection thermostat designed to protect hydronic coils and heat exchangers from localized freezing. This 15/55°F range controller features a DPST switch action and a 20-foot copper capillary element, ensuring that if any one-foot section of the bulb senses temperatures below the manual reset setpoint, the circuit trips to shut down fans or close dampers. Engineered for HVAC freeze protection in high-stratification environments, the 134-1504 freeze stat provides a fixed 5°F differential and is rated for both 120V and 240V AC applications. The remote bulb thermostat design allows for precise serpentine mounting across large coil faces, delivering the reliability required for critical commercial HVAC controls. Contractors typically utilize this double-pole single-throw unit to simultaneously stop supply fans and trigger remote alarm circuits during a low-limit event.
Key Benefits- Comprehensive Coil Coverage: The 20-foot vapor-filled capillary detects low-temperature conditions along any single foot of the sensing element.
- Dual Circuit Reliability: The 4-wire 2-circuit DPST configuration enables simultaneous fan shutdown and alarm notification.
- Adjustable Range: Provides a 15 to 55 degree Fahrenheit setpoint range with a concealed high-limit stop to prevent tampering.
- Robust Construction: Features an electroplated copper bulb for maximum sensitivity and a durable metal housing for mechanical longevity.
- Universal Compatibility: Includes a universal mounting bracket for easy integration into existing air handling units and ductwork.
How do you wire the Siemens 134-1504 for fan shutdown?
In a typical 4-wire setup, the main contacts are wired in series with the fan starter coil or HVAC control circuit. When the capillary senses a temperature drop to the setpoint, the DPST switch opens the fan circuit and closes the auxiliary alarm circuit. Since this is a manual reset thermostat, an operator must physically push the reset button once temperatures rise above the 5°F differential.
Where should the 20-foot capillary bulb be installed?
For effective low temperature detection, the capillary should be mounted in a serpentine pattern on the downstream side of the heating or cooling coil. Use the included perforated strap hangers to ensure the bulb covers the entire air stream, specifically targeting areas where air stratification might occur.
Can the 134-1504 be used for high-voltage switching?
Yes, the Siemens 134-1504 is rated for line voltage applications, capable of switching up to 16 Amps at 120V or 240V AC, making it suitable for direct control of small motors or as a pilot duty device for larger contactors.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Siemens Building Technology 134-1504 is a heavy-duty, 4-wire 2-circuit electric low temperature detection thermostat designed to protect hydronic coils and heat exchangers from localized freezing. This 15/55°F range controller features a DPST switch action and a 20-foot copper capillary element, ensuring that if any one-foot section of the bulb senses temperatures below the manual reset setpoint, the circuit trips to shut down fans or close dampers. Engineered for HVAC freeze protection in high-stratification environments, the 134-1504 freeze stat provides a fixed 5°F differential and is rated for both 120V and 240V AC applications. The remote bulb thermostat design allows for precise serpentine mounting across large coil faces, delivering the reliability required for critical commercial HVAC controls. Contractors typically utilize this double-pole single-throw unit to simultaneously stop supply fans and trigger remote alarm circuits during a low-limit event.
Key Benefits- Comprehensive Coil Coverage: The 20-foot vapor-filled capillary detects low-temperature conditions along any single foot of the sensing element.
- Dual Circuit Reliability: The 4-wire 2-circuit DPST configuration enables simultaneous fan shutdown and alarm notification.
- Adjustable Range: Provides a 15 to 55 degree Fahrenheit setpoint range with a concealed high-limit stop to prevent tampering.
- Robust Construction: Features an electroplated copper bulb for maximum sensitivity and a durable metal housing for mechanical longevity.
- Universal Compatibility: Includes a universal mounting bracket for easy integration into existing air handling units and ductwork.
How do you wire the Siemens 134-1504 for fan shutdown?
In a typical 4-wire setup, the main contacts are wired in series with the fan starter coil or HVAC control circuit. When the capillary senses a temperature drop to the setpoint, the DPST switch opens the fan circuit and closes the auxiliary alarm circuit. Since this is a manual reset thermostat, an operator must physically push the reset button once temperatures rise above the 5°F differential.
Where should the 20-foot capillary bulb be installed?
For effective low temperature detection, the capillary should be mounted in a serpentine pattern on the downstream side of the heating or cooling coil. Use the included perforated strap hangers to ensure the bulb covers the entire air stream, specifically targeting areas where air stratification might occur.
Can the 134-1504 be used for high-voltage switching?
Yes, the Siemens 134-1504 is rated for line voltage applications, capable of switching up to 16 Amps at 120V or 240V AC, making it suitable for direct control of small motors or as a pilot duty device for larger contactors.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
