Carrier instruction manual ÐModel 38CKB, Safety Considerations, ÐMake Piping Connections

38CKBÐ50 Hz Air Conditioning Unit

Installation and Start-Up Instructions

NOTE: Read the entire instruction manual before starting the installation.

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause death, personal injury, or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or agency must use factory-authorized kits or accessories when modifying this product. Refer to the individual instructions packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses, protective clothing, and work gloves. Use quenching cloth for brazing operations. Have fire extinguisher available. Read these instructions thor- oughly and follow all warnings or cautions included in literature and attached to the unit. Consult local building codes and national electric codes for special requirements.

Recognize safety information. This is the safety-alert symbol . When you see this symbol on the unit and in instructions or manuals, be alert to the potential for personal injury.

Understand the signal word DANGER, WARNING, or CAU- TION. These words are used with the safety-alert symbol. DAN- GER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which would result in minor personal injury or product and property damage.

Before installing, modifying, or servicing system, main elec- trical disconnect switch must be in the OFF position. There may be more than 1 disconnect switch. Lock out and tag switch with a suitable warning label. Electrical shock can cause personal injury or death.

INSTALLATION

Step 1ÐCheck Equipment and Jobsite

UNPACK UNIT Ð Move to final location. Remove carton taking care not to damage unit.

INSPECT EQUIPMENT Ð File claim with shipping company prior to installation if shipment is damaged or incomplete. Locate unit rating label on unit service panel. (See Fig. 2.) It contains information needed to properly install unit. Check rating label to be sure unit matches job specifications.

Step 2ÐInstall on a Solid, Level Mounting Pad

If conditions or local codes require the unit be attached to pad, tiedown bolts should be used and fastened through knockouts provided in unit base pan. Refer to unit mounting pattern in Fig. 2 to determine base pan size and knockout hole location.

When installing, allow sufficient space for airflow clearance, wiring, refrigerant piping, and service. Allow 30-in. (762mm) clearance to service end of unit and 48 in. (1219mm) above unit.

A94356

Fig. 1ÐModel 38CKB

For proper airflow, a 6-in. (152mm) clearance on 1 side of unit and 12 in. (305mm) on all remaining sides must be maintained. Maintain a distance of 24 in. (610mm) between air conditioners. Position so water, snow, or ice from roof or eaves cannot fall directly on unit.

On rooftop applications, locate unit 6 in. (152mm) above roof surface. Where possible, place unit above a load-bearing wall.

Arrange supporting members to adequately support unit and minimize transmission of vibration to building. Consult local codes governing rooftop applications.

Step 3ÐReplace Indoor AccuRater® Piston, if Required

Check indoor coil piston to see if it matches the required piston shown on unit rating label. If it does not match, replace indoor coil piston with piston shipped with this unit. The piston shipped with outdoor unit is correct for any approved indoor coil combination.

Remove indoor coil piston if unit is to be installed on system with a TXV metering device.

Step 4ÐMake Piping Connections

Outdoor units may be connected to indoor sections using accessory tubing package or field-supplied refrigerant grade tubing of correct size and condition. For tubing requirements beyond 50 ft (15.24m), consult Long-Line Application Guideline which is available at your local distributor.

NOTE: In some cases, noise in the living area has been traced to gas pulsations from improper installation of equipment.

INSTALLATION RECOMMENDATIONS

1.Locate the unit away from windows.

2.Ensure that vapor and liquid tube diameters are appropriate to the capacity of the unit. (See Table 1.)

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book	1	4	PC 101	Catalog No. 013-862	Printed in U.S.A.	Form 38CKB-C1SI	Pg 1	12-94	Replaces: New
Tab	3a	2a