PRE-START-UP
Proceed as follows to inspect and prepare the unit for initial start-up:
1. Remove all access panels.
2. Read and follow instructions on all DANGER, WARNING, CAUTION, and INFORMATION labels attached to,
or shipped with unit.
3. Make the following inspections:
a. Inspect for shipping and handling damages, such as broken lines, loose parts, disconnected wires,
etc.
b. Inspect for oil at all refrigerant tubing connections and on unit base. Detecting oil generally indicates a
refrigerant leak. Leak test all refrigerant tubing connections using electronic leak detector, or liquid-
soap solution. If a refrigerant leak is detected, see Check for Refrigerant Leaks
section.
c. Inspect all field-and factory-wiring connections. Be sure that connections are completed and tight.
d. Ensure wires do not touch refrigerant tubing or sharp sheet metal edges.
e. Inspect coil fins. If damaged during shipping and handling, carefully straighten fins with a fin comb.
4. Verify the following conditions:
a. See Outdoor Fan Adjustment
section.
b. Make sure that air filter is in place.
c. Make sure that condensate drain pan and trap are filled with water to ensure proper drainage.
d. Make sure that all tools and miscellaneous loose parts have been removed.
Fig. 8 - Control Connections
Caution
FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death and/or property damage.
1. Follow recognized safety practices and wear protective goggles when checking or servicing refrigerant system.
2. Relieve and recover all refrigerant from system before touching or disturbing compressor plug if refrigerant leak is
suspected around compressor terminals.
3. Never attempt to repair soldered connection while refrigerant system is under pressure.
4. Do not use torch to remove any component. System contains oil and refrigerant under pressure.
5. To remove a component, wear protective goggles and proceed as follows:
a. Shut off electrical power to unit and install lockout tag.
b. Relieve and reclaim all refrigerant from system using both high-and low-pressure ports.
c. Cut component connecting tubing with tubing cutter and remove component from unit.
d. Carefully unsweat remaining tubing stubs when necessary. Oil can ignite when exposed to torch flame.
WARNING
PERSONAL INJURY AND ENVIRONMENTAL HAZARD
Failure to relieve system pressure could result in personal injury and/or death.
Relieve pressure and recover all refrigerant before system repair or final unit disposal. Wear safety glasses
and gloves when handling refrigerant. Keep torches and other ignition sources away from refrigerants and
oils.
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