McDonnell & Miller 194 Controller
As a veteran HVACR technician, you know that maintaining precise water levels in high-pressure systems isn't just about efficiency—it is about safety and equipment longevity. The McDonnell & Miller 194 Low Water Cut-Off and Pump Controller (Part Number 166600) is the industry standard for commercial and industrial steam boilers, engineered to operate reliably in environments up to 250 PSI max pressure. This heavy-duty combination LWCO and pump controller features a water column body with integral 1/2" NPT tappings, allowing for direct installation of gauge glasses and tri-cocks. Unlike bellows-style units that are prone to fatigue and failure under high-cycle conditions, the Series 194 utilizes magnetic repulsion to actuate its switches, eliminating the primary point of mechanical wear. This specific model comes equipped with the standard No. 5 snap-acting SPDT switches, ensuring positive electrical contact for both burner cut-off and boiler feed pump sequencing. The 1-1/4" NPT threaded connections and ten-bolt flange design provide the robust seal and structural integrity required for high-capacity steaming applications.
Key Benefits- Enhanced Reliability: The magnetic repulsion mechanism eliminates the need for bellows, preventing common leak points and mechanical fatigue in high-pressure steam.
- High-Pressure Capability: Specifically rated for 250 PSI, making it suitable for demanding industrial process steam and high-pressure heating systems.
- Integrated Water Column: Simplifies installation by providing built-in ports for visual water level monitoring and manual blowdown testing.
- Dual-Function Control: Consolidates low water safety cut-off and automatic pump cycling into a single, rugged 166600 assembly.
- What is the difference between the Series 193 and Series 194? While both look similar, the Series 194 is specifically reinforced for high-pressure steam applications up to 250 PSI, whereas the 193 is typically rated for lower pressure limits.
- Can I replace the switch mechanism without draining the boiler? Yes, the No. 5 switch assembly can be serviced or replaced because the magnetic field operates through a solid brass enclosure, though we always recommend following standard lock-out/tag-out safety protocols.
- How often should I blow down the 194 controller? For systems operating above 15 PSI, a daily blowdown is recommended to clear sediment and verify the float and switch responsiveness.
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.
Original: $2,694.06
-65%$2,694.06
$942.92McDonnell & Miller 194 Controller
As a veteran HVACR technician, you know that maintaining precise water levels in high-pressure systems isn't just about efficiency—it is about safety and equipment longevity. The McDonnell & Miller 194 Low Water Cut-Off and Pump Controller (Part Number 166600) is the industry standard for commercial and industrial steam boilers, engineered to operate reliably in environments up to 250 PSI max pressure. This heavy-duty combination LWCO and pump controller features a water column body with integral 1/2" NPT tappings, allowing for direct installation of gauge glasses and tri-cocks. Unlike bellows-style units that are prone to fatigue and failure under high-cycle conditions, the Series 194 utilizes magnetic repulsion to actuate its switches, eliminating the primary point of mechanical wear. This specific model comes equipped with the standard No. 5 snap-acting SPDT switches, ensuring positive electrical contact for both burner cut-off and boiler feed pump sequencing. The 1-1/4" NPT threaded connections and ten-bolt flange design provide the robust seal and structural integrity required for high-capacity steaming applications.
Key Benefits- Enhanced Reliability: The magnetic repulsion mechanism eliminates the need for bellows, preventing common leak points and mechanical fatigue in high-pressure steam.
- High-Pressure Capability: Specifically rated for 250 PSI, making it suitable for demanding industrial process steam and high-pressure heating systems.
- Integrated Water Column: Simplifies installation by providing built-in ports for visual water level monitoring and manual blowdown testing.
- Dual-Function Control: Consolidates low water safety cut-off and automatic pump cycling into a single, rugged 166600 assembly.
- What is the difference between the Series 193 and Series 194? While both look similar, the Series 194 is specifically reinforced for high-pressure steam applications up to 250 PSI, whereas the 193 is typically rated for lower pressure limits.
- Can I replace the switch mechanism without draining the boiler? Yes, the No. 5 switch assembly can be serviced or replaced because the magnetic field operates through a solid brass enclosure, though we always recommend following standard lock-out/tag-out safety protocols.
- How often should I blow down the 194 controller? For systems operating above 15 PSI, a daily blowdown is recommended to clear sediment and verify the float and switch responsiveness.
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
As a veteran HVACR technician, you know that maintaining precise water levels in high-pressure systems isn't just about efficiency—it is about safety and equipment longevity. The McDonnell & Miller 194 Low Water Cut-Off and Pump Controller (Part Number 166600) is the industry standard for commercial and industrial steam boilers, engineered to operate reliably in environments up to 250 PSI max pressure. This heavy-duty combination LWCO and pump controller features a water column body with integral 1/2" NPT tappings, allowing for direct installation of gauge glasses and tri-cocks. Unlike bellows-style units that are prone to fatigue and failure under high-cycle conditions, the Series 194 utilizes magnetic repulsion to actuate its switches, eliminating the primary point of mechanical wear. This specific model comes equipped with the standard No. 5 snap-acting SPDT switches, ensuring positive electrical contact for both burner cut-off and boiler feed pump sequencing. The 1-1/4" NPT threaded connections and ten-bolt flange design provide the robust seal and structural integrity required for high-capacity steaming applications.
Key Benefits- Enhanced Reliability: The magnetic repulsion mechanism eliminates the need for bellows, preventing common leak points and mechanical fatigue in high-pressure steam.
- High-Pressure Capability: Specifically rated for 250 PSI, making it suitable for demanding industrial process steam and high-pressure heating systems.
- Integrated Water Column: Simplifies installation by providing built-in ports for visual water level monitoring and manual blowdown testing.
- Dual-Function Control: Consolidates low water safety cut-off and automatic pump cycling into a single, rugged 166600 assembly.
- What is the difference between the Series 193 and Series 194? While both look similar, the Series 194 is specifically reinforced for high-pressure steam applications up to 250 PSI, whereas the 193 is typically rated for lower pressure limits.
- Can I replace the switch mechanism without draining the boiler? Yes, the No. 5 switch assembly can be serviced or replaced because the magnetic field operates through a solid brass enclosure, though we always recommend following standard lock-out/tag-out safety protocols.
- How often should I blow down the 194 controller? For systems operating above 15 PSI, a daily blowdown is recommended to clear sediment and verify the float and switch responsiveness.
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.
