
PRE-START-UP
!WARNING
FIRE, EXPLOSION, ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury, death and/or property damage:
1. Follow recognized safety practices and wear protective goggles when checking or servicing a refrigerant system.
2.Do not operate the compressor or provide any electric power to the unit unless the compressor terminal cover is in place and secured.
3.Do not remove the compressor terminal cover until all electrical sources are disconnected and tagged with lockout tags.
4.Relieve all pressure from the system before touching or disturbing anything inside the terminal box if a refrigerant leak is suspected around the compressor terminals. Use accepted methods to recover the refrigerant.
5.Never attempt to repair a soldered connection while the refrigerant system is under pressure.
6.Do not use a torch to remove any component. The system contains oil and refrigerant under pressure. To remove a component, wear protective goggles and proceed as follows:
a.Shut off electrical power to the unit and tag disconnect.
b.Recover refrigerant to relieve all pressure from the system using both
and
c. Cut component connection tubing with a tubing cutter, and remove the component from the unit.
d. Carefully unsweat the remaining tubing stubs when necessary. Oil can ignite when exposed to a torch flame.
Proceed as follows to inspect and prepare the unit for initial
1.Remove all access panels.
2.Read and follow instructions on all 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, or disconnected wires, etc.
b.Inspect for oil at all refrigerant tubing connections and on unit base. Detecting oil generally indicates a refrigerant leak.
c.Inspect all
d.Inspect coil fins. If damaged during shipping and handling, carefully straighten fins with a fin comb.
4.Verify the following conditions:
a.Make sure that
b.Make sure that air filter(s) is in place.
c.Make sure that condensate drain trap is filled with water to ensure proper drainage.
d.Make sure that all tools and miscellaneous loose parts have been removed.
START-UP
Unit Preparation
Make sure that the unit has been installed in accordance with installation instructions and applicable codes.
Gas Piping
Check gas piping for leaks.
!WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal injury or death.
Disconnect gas piping from unit when leak testing at pressure greater than 1/2 psig. Pressures greater than 1/2 psig will cause gas valve damage resulting in hazardous condition. If gas valve is subjected to pressure greater than 1/2 psig, it must be replaced before use. When pressure testing
Return-Air Filters
Make sure the correct filters are installed in the unit (See Table 1 or 2). Do not operate the unit without
Outdoor-Air Inlet Screens
Compressor Mounting
Compressors are internally spring mounted. Do not loosen or remove the compressor holddown bolts.
Internal Wiring
Check all electrical connections in unit control boxes; tighten them as required.
Refrigerant Service Ports
Each unit system has 4
High Flow Refrigerant Valves
Two high flow valves are located on the hot gas tube coming out of the compressor and the suction tube going into the compressor. Large black plastic caps identify these valves. These valves have
581B,C
41