Pre-start Checklist
Unit Installation and Connections
Check that equipment is fully installed in accordance with the installation instructions
Visually check that air flows will not be obstructed
Electrical
Visually check all field wiring
Tighten all electrical connections including all factory wiring connections
Ensure supply cable is correct size
Check the required supply voltage is available on all phases
Check overload settings are correct (if applicable)
Filters
Check that both the fresh air and return air have adequate filters before starting unit
Starting Unit
Check Fans and Air Flows
Turn on all circuit breakers
Make sure all dampers are open
Turn on control circuit and activate fans
Turn on supply fan, run and conduct an air balance (Fans do not require phase rotation)
Turn on exhaust fan, run and conduct an air balance
Check fan current draw for each fan individually
XEM – External Mount Unit Installation and Operation Manual 2021 11
