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you can wire to the "Normally Open" (NO) or "Normally Closed" (NC) terminals to control either a cooling system (close on rise) or a heating system (open on rise)
Thermostatic operation prevents vacuum lock and ensures consistent radiator venting performance
Precision Fit: Engineered to the exact 16-thread specification for a seamless Wilbur Curtis WC-3005 crossover
making it ideal for systems requiring continuous operation or external power cycling
Direct Compatibility: Designed for an immediate fit on Weil McLain HE and HE II models
Johnson Controls A19ACA-34 Utility Thermostat Els PW 17895 you can wire to theJohnson Controls A19ACA 34 Utility Thermostat, 120 208 240 Vac, 30 50 Degree Temperature Range, Open Low, 10' Capillary Length, 3 8" x 4" Remote Bulb, Manual Reset, Enclosed Setpoint Adjustment
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