The Nu-Calgon 4287-34 Nickel Safe Ice Machine Cleaner is the industry-standard phosphoric acid-based descaler designed specifically for nickel-plated evaporators

Key Benefits: Direct OEM Specification: Ensures exact fit and microamp signal compatibility with Allied Air and Armstrong furnace control modules

Avoid over-torquing

5-28 VDC allows for exact calibration to specific field device requirements

Weil McLain 511-724-274 Flame Sensor Els PW 17895 The Nu-Calgon 4287-34 Nickel SafeThe Weil McLain 511 724 274 Main Flame Sensor is a critical OEM replacement part engineered for precise flame rectification in high efficiency boiler systems. As a veteran technician knows, a fouled or oxidized HVAC flame sensor is the primary culprit behind intermittent ignition failure and short cycling. This genuine Weil McLain replacement part is designed to withstand high combustion temperatures, providing a reliable microamp signal to the boiler