Carrier 38TRA060 SERIES340, 38TRA060 SERIES300, 38TRA048 SERIES360, 38TRA024 SERIES340, 38TRA048 SERIES300 Installation Guide

...

HEATING & COOUNG

Visit www.carrier.cmn

Installation and Start-Up Instructions

NOTE: Read the entire instruction manual before starting the

installation. This symbol =-> indicates a change since the last issue.

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause personal injury or property damage. Consult a qnalified 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 pack-

aged with the kits or accessories when installing. Follow all safety codes. Wear safety glasses and work gloves. Use

quenching cloth for brazing operations. Have fire extinguisher available. Read these instructions thoroughly and follow all

warning or cautions attached to the unit. Consult local building

codes and National Electrical Code (NEC) for special reqnire-

lilents.

Recognize safety information. This is the safety-alert symbol z_ • When you see this symbol on the unit and in instructions or

manuals, be alert to the potential for personal injury. Understand these signal words; DANGER, WARNING, and

CAUTION. These words are used with the safety-alert symbol. DANGER 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. NOTE is used to highlight

suggestions which will result in enhanced installation, reliability, or operation.

¥.,_ "EY!3;_II_r3

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 RECOMMENDATIONS

NOTE: In some cases, noise in the living area has been traced to

gas pulsations fi'om improper installation of equipment.

i. Locate the unit away l}om windows.

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

3. Run refrigerant robes as directly as possible by avoiding unnecessary tunas and bends.

4. Leave some slack between the structure and the unit to absorb vibration.

38TRA

Air Conditioning Unit

A98516

Fig. 1--Model 38TRA

5. When passing refrigerant robes through the wall, seal the opening with RTV or other pliable silicon-based caulk. (See Fig. 3.)

6. Avoid direct lineset contact with water pipes, ductwork, floor

joists, wall studs, floors, and walls.

7. Do not suspend rel}igerant robing fi'om joists and studs with a rigid wire or strap which comes in direct contact with the tubing. (See Fig. 3.)

8. Ensure that tubing insulation is pliable and completely sur- rounds the vapor line.

9. When necessary, use hanger straps which are 1 in. wide and conform to the shape of the tubing insulation. (See Fig. 3.)

10. Isolate the hanger straps from the insulation by using metal sleeves bent to conlbrm to the shape of the insulation.

When outdoor unit is connected to _actory-approved indoor unit, outdoor unit contains system refrigerant charge for operation with factory-approved indoor unit of the same size when connected by

15 ft of field-supplied tubing. For proper unit operation, check

refrigerant charge using charging information located on control

box cover.

IMPORTANT: Maxinmm liquid-line size is 3/8-in. O.D. for all residential applications including long line.

IMPORTANT: Always install a liquid line filter drier on any system using an existing field service lineset and/or indoor evaporator coil or fan coil. Also, always use liquid line filter driers on burnout compressor replacements. Refer to Product Data Digest for appropriate part number. Obtain filter driers fi'om your local

distributor or branch.

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

PC 101 Catalog No 533-80090 Printed in USA. Form 38TRA-6Sl Pg 1 02-03 Replaces: 38TRA-5Sl

Table 1--Refrigerant Connections and Recommended Liquid and Va

UNIT SIZE

018, 024 3/8 3/8 5/8 5/8 030, 036 3/8 3/8 3/4 3/4 042, 048 3/8 3/8 7/8 7/8

060 3/8 3/8 7/8 !-1/8

Notes: 1 Tube diameters are for lengths up to 50 ft. For tube sets over 50 ft horizontal and/or 20 ft vertical differential consult Residential Long-Line Application GuideIine.

2. Do not apply capilIary tube indoor coils to these units.

Connection Diameter Tube Diameter Connection Diameter Tube Diameter

LIQUID VAPOR

_or Tube Diameters (In.)

VAPOR (LONG LINE)

Connection Diameter Tube Diameter

5/8 3/4 3/4 7/8 7/8 1-1/8 7/8 1-1/8

INSTALLATION

Step l--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 a pad, tie down bolts should be used and fastened through knockouts provided in unit base pan. Refer to unit mounting pattern shown in

Fig. 2 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 fi'om

structure. Arrange supporting members to adequately support unit

and minimize transmission of vibration to building. Consult local

codes goveruing rooftop applications. Roof mounted units exposed to winds above 5 mph may require

wind baffles. Consult Low-Ambient Guideline for wind baffle

construction.

NOTE: Unit must be level to within ±2 ° per compressor manu-

facturer specifications.

Step a--Clearance Requirements

When installing, allow sufficient space for airflow, wiring, refrig-

erant 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.

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

Step 4_Operating Ambient

The mininmm outdoor operating ambient in cooling mode is 55°F, and the maxinmm outdoor operating ambient in cooling mode is

125°F.

Step 5--Replace Indoor AccuRater TM Piston, if Required

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

Remove indoor coil piston if unit is to be installed on system with a thermostatic expansion valve (TXV) metering device.

NOTE: Avoid contact between tubing and structure

____OOTOOO WA L-- ,.OOO WAL>.

CAULK ' r fz_ L,QU,DTUBE

3/8-1N DIA TIEDOWN --_

KNOCKOUTS IN BASEPAN \

(2) PLACES \

/ ."......,/V o T \ ",>.:_

I" ,,',_t.:(( '>_!/_ql

\ c. _ ,£\ _ 2 ,/2 /?:>

VIEW FROM TOP I _

Dimensions (In.)

UNIT BASE TIEDOWN KNOCKOUT LOCATIONS

PAN DIMENSIONS A B

22.5 X 27.5 2-13/!6 6-15/16

30.0 X 35.0 4 9-3/4

Fig. 2--Clearance Requirements

8 3/16"

SULATI

THROUGH THE WALL

HANGER STRAP-- N _f"---JOIST

(AROUND VAPOR N, --

()

_i I VAPOR TUBE

1"MIN.--,-I

LIQUID TUBE

SUSPENSION

A94028

Fig. 3--Piping Installation

Table 2--Accessory Usage

REQUIRED FOR REQUIRED FOR

ACCESSORY APPLICATIONS

Crankcase Heater Yes Yes No

Evaporator Freeze Thermostat Yes No No

Winter Start Control YeM- No No

Accumulator No No No

Compressor Start Assist

Capacitor and Relay

MotorMaster TM Control

Low-Ambient Pressure Switch

Liquid-Line Solenoid Valve See Long-Line

Ball Bearing Fan Motor YeMt No No

*For tubing line sets between 50 and 175 ft, refer to Residential Split System Long-Line Application Guideline tOnty when low-pressure switch is used

*Required for low-ambient controlIer (full modulation feature) and MotorMaster Control only

or Yes No No

Wind Baffle See Low-Ambient Instructions No No

Coastal Filter No No Yes

Support Feet Recommended No Recommended

or No Application No

Hard Shutoff TXV GuideIine

LOW=AMBIENT LONG-LINE

APPLICATIONS APPLICATIONS*

(BELOW SS°F) (OVER S0 FT)

Yes Yes No

REQUIRED FOR

SEA COAST

(WITHIN 2 MILES)

Step 6--Making Tubing Connections

Relieve pressure and recover all refi'igerant before system repair or final unit disposal to avoid personal injury or death. Use all service ports and open all flow-control devices,

including solenoid valves.

r:l [ "_.lliilI.]_

If ANY refrigerant tubing is buried, provide a 6 in. vertical rise at service valve. Refrigerant tubing lengths up to 36 in. may be buried without further special consideration. For

lengths above 36 in., consult your local distributor.

g.,l[_

To prevent damage to unit or service valves observe the

following:

•Use a brazing shield.

•Wrap service valves with wet cloth or use a heat sink

material.

Outdoor units may be connected to indoor section using accessory tubing package or field-supplied refrigerant tubing of correct size and condition. For tubing requirements beyond 50 ft, substantial capacity and performance losses can occur. Following the recom-

mendations in the Residential Split System Long-Line Application

Guideline will reduce these losses. Refer to Table 1 for field tubing equivalent line length. Refer to Table 2 lbr accessory require-

lIlents.

For buried-line applications greater than 36 in., consult your local distributor.

If refi'igerant tubes or indoor coil are exposed to atmosphere, they

must be evacuated to 500 microns to eliminate contamination and moisture in the system.

OUTDOOR /_'IT CONNECTED TO FACTORY-APPROVED INDOOR LEX'IT Outdoor unit contains correct system refriger-

ant charge for operation with indoor unit of same size when connected by 15 ft of field-supplied or factory-accessory tubing. Check refrigerant charge for maximum efficiency.

REFRIGERANT TUBING Connect tubing to fittings on outdoor unit vapor and liquid service valves. (See Table 1.) Use refrigerant grade tubing.

SWEAT CONNECTION Service valves are closed from factory and ready for brazing. After wrapping the selwice valve

with a wet cloth, the tubing set can be brazed to the service valve using either silver bearing or non-silver bearing brazing material. Con-sult local code requirements. Refrigerant tubing and indoor coil are now ready for leak testing. This check should include all field and factory joints.

Step 7--Make Electrical Connections

Be sure field wiring complies with local and national fire, safety, and electrical codes, and voltage to system is within limits shown on unit rating plate. Contact local power company for con'ection of improper voltage. See unit rating plate for recommended circuit protection device.

NOTE: Operation of unit on improper line voltage constitutes abuse and could affect unit reliability. See unit rating plate. Do not install unit in system where voltage or phase imbalance may fluctuate above or below permissible limits.

NOTE: Use copper wire only between disconnect switch and unit.

NOTE: Install branch circuit of adequate size per NEC to handle unit starting current. Locate disconnect within sight from and readily accessible fi'om unit per Section 440-14 of NEC.

+ 5 hidden pages