Carrier 50ZH024-060 instruction manual Pre-Start-Up

4.Connect the RED lead to the BLK wire from which the ORG lead was disconnected. Insulate with wirenut from Step 1.

5.Using the wirenut removed from the RED lead, insulate the loose terminal on the ORG lead.

6.Wrap the wirenuts with electrical tape so that the metal terminals cannot be seen.

Indoor blower-motor speeds may need to be changed for 208-v operation. Refer to Indoor Airflow and Airflow Adjustments section. (See Table of Contents for page number.)

PRE-START-UP

Failure to observe the following warnings could result in serious injury or death:

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 and lockout tag is installed.

4.Relieve all pressure from both high- and low-pressure sides of the system before touching or disturbing anything inside terminal box if refrigerant leak is suspected around com- pressor terminals. Use accepted methods to recover refrig- erant.

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 and install lockout tag.

b.Relieve all refrigerant from system using both high- and low-pressure ports. Use accepted methods to recover refrigerant.

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.

Use the Start-Up Checklist supplied at the end of this book and 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.

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 refrig- erant leak is detected, see following Check for Refrigerant Leaks section.

c.Inspect all field- and factory-wiring connections. Be sure that connections are completed and tight. Ensure wires do not contact refrigerant tubing or sheet metal edges.

d.Inspect coil fins. If damaged during shipping and handling, carefully straighten fins with a fin comb.

3.Verify the following conditions:

HIGH-VOLTAGE	LOW-VOLTAGE
POWER WIRING	WIRING ENTRY
ENTRY HOLE	HOLE

C00010

Fig. 11ÐUnit Electrical Connection

ELECTRIC	GROUND	INDOOR	OUTDOOR FAN MOTOR	HIGH
HEATER	LUG	FAN	AND COMPRESSOR	VOLTAGE
FUSES		RELAY	START CAPACITOR	LEADS
				C00011

Fig. 12ÐControl Box Wiring

a.Make sure that outdoor-fan blade is correctly positioned in fan orifice. Top edge of blade should be 3.125 in. down from outdoor coil outlet grille (size 024±048, See Fig. 21) or hub should be 0.708-in. away from motor end bell (size 060, See Fig. 22). See Outdoor Fan Adjustment section.

b.Make sure that air filter 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

Use the Start-Up Checklist supplied at the end of this book and proceed as follows:

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