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PRE-START-UP
Failure to observe the following warnings could result in
serious personal injury:
1. Follow recognized safety practices and wear protective
goggles when checking or servicing refrigerant system.
2. Do not operate compressor or provide any electric power to
unit unless compressor terminal cover is in place and
secured.
3. Do not remove compressor terminal cover until all electri-
cal sources are disconnected.
4. Relieve and recover all refrigerant from system before
touching or disturbing anything inside terminal box if
refrigerant leak is suspected around compressor terminals.
5. Never attempt to repair soldered connection while refrig-
erant system is under pressure.
6. Do not use torch to remove any component. System
contains oil and refrigerant under pressure. To remove a
component, wear protective goggles and proceed as fol-
lows:
a. Shut off electrical power to unit.
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 neces-
sary. Oil can ignite when exposed to torch flame.
Proceed as follows to inspect and prepare the unit for initial
startup:
1. Remove access panel.
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, 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, halide torch, or liquid-soap solu-
tion. 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.
GROUND
SINGLE-PHASE
L1
CONNECTIONS
TO DISCONNECT
L2
PER NEC
L3
3-PHASE
CONNECTIONS
NOTE: Use copper wire only.
LEGEND
NEC – National Electrical Code
Field Wiring
Splice Connections
Fig. 24—High-Voltage Connections
19
GROUND LUG
(IN SLPICE BOX)
LEAD
BLK
YEL
BLU
d. Ensure electrical wiring does not contact refrigerant tubes
or sharp 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. Make sure that outdoor-fan blade is correctly positioned in
fan orifice. Leading edge of outdoor-fan blade should be 2
in. back from inlet grille or 1/2–in. maximum from the fan
deck.
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.
5. Compressors are internally spring mounted. Do not loosen or
remove compressor hold-down bolts.
6. Each unit (system) has 2 Schrader-type ports, one low-side
fitting located on the suction line, and one high-side fitting
located on the compressor discharge line. Be sure that caps
covering these Schrader fittings are tight.
CHECK FOR REFRIGERANT LEAKS
Proceed as follows to locate and repair a refrigerant leak and to
charge the unit:
1. Locate leak and make sure that refrigerant system pressure has
been relieved and reclaimed from both high- and low-pressure
ports.
2. Repair leak following accepted practices. NOTE: Install a
filter drier whenever the system has been opened for repair.
3. Add a small charge of R-22 refrigerant vapor to system and
leak-test unit.
4. Recover refrigerant from refrigerant system and evacuate to
500 microns if no additional leaks are not found.
5. Charge unit with R-22 refrigerant, using a volumetric-
charging cylinder or accurate scale. Refer to unit rating plate
for required charge. Be sure to add extra refrigerant to
compensate for internal volume of filter drier.
START-UP
C99057
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