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calibrated adjustment knob
the 3756 is specifically wound for 24V AC operation
causing high discharge pressures
maintaining a proper seal at the collector box is non-negotiable to prevent CO leakage and moisture damage to the control board
Proper installation requires verifying the vacuum hose connection and ensuring the venting system is clear of obstructions that could impact the pressure differential across the heat exchanger
McDonnell & Miller 94 Controller R-410A calibrated adjustment knobWorking on a high pressure system requires reliability that won't flake out when the building's steam demand peaks. The McDonnell & Miller Series 94 (Part Number 165200) is a heavy duty combination low water cut off and pump controller specifically engineered for commercial and industrial steam boilers. Rated for a maximum pressure of 250 PSI, this unit uses a unique magnetic repulsion mechanism that completely eliminates the need for a
