ensuring the changeover valve (O/B terminal) is set correctly for the specific brand of outdoor unit

verifying that the inducer motor is creating sufficient static pressure to vent combustion gases before the ignition sequence begins

Can I substitute this with a higher temperature limit switch

any scratching or enlargement of the 2

Trane CTR1494 Contactor Els PW 17895 ensuring the changeover valve (O/BWhen you are in the field servicing a commercial chiller or a large scale condenser, you need a high performance 3 pole contactor that stands up to heavy inductive loads. The Trane CTR1494 (also identified as CTR01494) is the industry standard HVAC replacement contactor for systems requiring a 110V 120V coil voltage and a 30A full load amp (FLA) rating. This definite purpose contactor features a robust 3 pole configuration, allowing for the