Universal Frequency Support: Built to operate reliably across both 50Hz and 60Hz cycles

often referred to as the See-All sight glass

separate pilot burner and flame sensor configurations

Direct OEM Compatibility: Engineered as the exact replacement for 632622

This model features a non-adjustable factory setpoint of 0

Johnson Controls A19ABA-4 Utility Thermostat 30067439-890 Universal Frequency Support: Built toThe Johnson Controls A19ABA 4 Utility Thermostat is a rugged, single stage remote bulb temperature control engineered for high accuracy cycling in commercial refrigeration and HVAC systems. Designed with a liquid filled sensing element, this controller maintains precision "repeat" accuracy regardless of barometric pressure or cross ambient temperature fluctuations. The A19ABA 4 features a broad 120 208 240 Vac compatibility and SPST (Single Pole