Mixing up heating and cooling sequences when pre-wiring a unit
2nd YearSystems & Controls
Study the unit wiring diagram before pulling any wire. Heating and cooling stages use different terminals — confirm with the controls drawings and verify…
Safer field move
Study the unit wiring diagram before pulling any wire. Heating and cooling stages use different terminals — confirm with the controls drawings and verify with a journeyman before energizing.
Ask Foreman
Can you verify this before I keep going? I’m looking at: Mixing up heating and cooling sequences when pre-wiring a unit. What’s the approved correction for this job?
Do not
Do not hide, force, cover, or “make it work” if this affects safety, access, airflow, rated assemblies, supports, equipment, or inspection. Stop and verify the approved correction.