Carrier 38BYC ConnectingTubing Installation, Dimensions In, MountingUnit to Pad, OperatingAmbient

NOTE: Avoid contact between tubing and structure

OUTDOOR WALL INDOOR WALL

CAULK

LIQUID TUBE

VAPOR TUBE

INSULATION

THROUGH THE WALL

JOIST

HANGER STRAP

(AROUND VAPOR

TUBE ONLY)INSULATION VAPOR TUBE

1″ MIN.

LIQUID TUBE

SUSPENSION

A94028

Fig. 2—Connecting Tubing Installation

INSTALLATION

Step 1—Check Equipment and Job Site

UNPACK UNIT

Move to final location. Remove carton, taking care not to damage unit.

INSPECT EQUIPMENT

File claim with shipping company prior to installation if shipment is damaged or incomplete. Locate unit rating plate on unit service panel. It contains information needed to properly install unit. Check rating plate to be sure unit matches job specifications.

Step 2—Install 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. 3 to determine base pan size and knockout hole location.

On rooftop applications, mount on level platform or frame. Place unit above a load bearing wall and isolate unit and tubing set from structure. Arrange supporting members to adequately support unit and minimize transmission of vibration to building. Consult local codes governing rooftop applications.

Roof mounted units exposed to winds above 5 mph may require wind baffles to achieve adequate defrost. Consult Low Ambient Guideline for wind baffle construction.

NOTE: Unit must be level to within ± 2° (± 3/8 in./ft) per compressor manufacturer specifications.

Step 3—Clearance Requirements

When installing, allow sufficient space for airflow clearance, wiring, refrigerant piping, and service. Allow 30-in. clearance to service end of unit and 48 in. above unit. For proper airflow, a 6-in. clearance on 1 side of unit and 12 in. on all remaining sides must be maintained. Maintain a distance of 24 in. between units. Position so water, snow, or ice from roof or eaves cannot fall directly on unit.

C

						3⁄8″ D. (9.53) TIEDOWN
		A				KNOCKOUTS (2) PLACES
				B					A94199
			Dimensions (In.)
UNIT		MINIMUM			TIEDOWN KNOCKOUT LOCATIONS
	MOUNTING-PAD
SIZE					A		B		C
		DIMENSIONS
018-024		22-1/2 X 22-1/2			3-11/16		18-1/8	14-3/8
030-060		30 X 30			6-1/2		23-1/2	20

Fig. 3—Mounting Unit to Pad

On rooftop applications, locate unit at least 6 in. above roof surface.

Step 4—Operating Ambient

The minimum outdoor operating ambient in cooling mode is 55°F, and the maximum outdoor operating ambient in cooling mode is 125°F. The maximum outdoor operating ambient in heating mode is 66°F.

Step 5—Elevate Unit

Accumulation of water and ice in base pan may cause equipment damage.

In areas where prolonged freezing temperatures are encountered, elevate unit per local climate and code requirements to provide clearance above estimated snowfall level and ensure adequate drainage of unit.

Step 6—Remove Indoor AccuRater® Piston and Install

TXV

For proper unit operation and reliability, units must be installed with field supplied hard shutoff TXV. Do not install with evaporator coils having capillary tube metering devices or pistons.

For TXV kit part number and charging instructions, refer to TXV label in outdoor unit. If indoor unit (fan coil) comes factory equipped with a bi-flow hard shutoff TXV, no TXV change is required.

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