Carrier 38YZA060 SERIES310, 38YZA048 SERIES320, 38YZA048 SERIES310, 38YZA042 SERIES320, 38YZA036 SERIES320 Installation Guide

38YZA

HEATING & COOUNG

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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 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 fiactory-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

Electrical Code (NEC) for special requirements.

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 the signal words DANGER, WARNING, and 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. NOTE is used to highlight

suggestions which will result in enhanced installation, reliability,

or operation.

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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.

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Puron_; systems operate at higher pressures than standard
R-22 systems. Be certain that service equipment is rated for
Puron_;. Some R-22 service equipment may not be accept-
able. Check with your distributor.

INSTALLATION RECOMMENDATIONS

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

gas pulsations from improper installation of equipment.

i. Locate unit away from windows, patios, decks, etc. where unit

operation sound may disturb customer.

2. Ensure that vapor and liquid tube diameters are appropriate to
capacity of unit.

Heat

Deluxe 12 SEER Split-System

Pump with Puron® Refrigerant

A98516

Fig. 1--Model 38YZA

3. Run refrigerant tubes as directly as possible by avoiding
unnecessary turns and bends.

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

5. When passing refrigerant tubes through the wall, seal opening
with RTV or other pliable silicon-based caulk. (See Fig. 2.)

6. Avoid direct tubing contact with water pipes, duct work, floor

joists, wall studs, floors, and walls.

7. Do not suspend refrigerant tubing from joists and studs with a
rigid wire or strap which comes in direct contact with robing.
(See Fig. 2.)

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

9. When necessary, use hanger straps which are 1 in. wide and
conform to shape of tubing insulation. (See Fig. 2.)

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

When outdoor unit is connected to _actory-approved indoor unit,
outdoor unit contains system refrigerant charge for operation with
indoor unit of same size when connected by 15 ft of field-supplied
or _actory accessory tubing. Add (or subtract) 0.6 ozift of 3/8 in.
liquid line for lengths greater (or less) than 15 ft. For proper unit
operation, check refrigerant charge using charging information
located on control box cover or in the Cheek Charge section of this

instruction.

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

IMPORTANT: Always install the factory-supplied Puron:R; heat
pump (bi-flow) liquid-line filter drier. If replacing the filter drier,
refer to Product Data Digest for appropriate part number. Obtain
replacement filter driers from your 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. 533-80083 Printed in U.S.A. Form 38YZA-4SI Pg 1 2-03 Replaces: 38YZA-3Sl

NOTE: Avoid contact between tubing and structure

V OUTDOOR WALL_ INDOOR WAL_

CAULK

[!_"_ <--_ _,_F LIQUID TUBE

_N ON_!A VAPOR TUBE

SULATI

THROUGH THE WALL

3/8-1N DIA TIEDOWN

KNOCKOUTS IN BASEPAN

(2) PLACES

!

A

t.

HANGER STRAP-- x

(AROUNDVAPOR_._--

i] _--INSULATION

TUBE_,

.,_,,-_J OIST

VAPOR TUBE

1"M,N.-----I L LIQUID TUBE

SUSPENSION

A94028

Fig. 2--Connecting Tubing Installation

INSTALLATION

IMPORTANT: Specifications for this unit in residential new

construction market require the outdoor unit, indoor unit, refrig-
erant tubing sets, metering device, and filter &ier listed in presale
literature. There can be no deviation. Consult the Application
Guideline and Service Manual Air Conditioners and Heat Pumps

Using Puron:R; Refi'igerant to obtain required unit changes for

specific applications and for R-22 retrofit.

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 corner

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

It"conditions o1"local codes require the unit be attached to pad, tie

down bolts should be used and fastened through knockouts
provided in unit base pan. Refer to unit mounting pattern in Fig. 3
to detemline 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 governing rooftop applications.

VIEW FROM TOP

3/16"

A97548

Dimensions (In.)

UNIT SIZE

018, 024

030-060

MINIMUM

MOUNTING PAD

DIMENSIONS

Support Feet Snow Stand

19 X 24 23-1/2 X 28

26 X 32 3! X 35

TIEDOWN KNOCKOUT

LOCATIONS

A B

2-13/16 6-15/16

4 9-3/4

Fig. 3--Mounting Unit to Pad

Do not allow POE lubricant to come into contact with roofing
material. POE may deteriorate certain types of synthetic
roofing.

Roof mounted units exposed to winds above 5 mph may require
wind baffles. Consult the Application Guideline and Service
Manual Air Conditioners and Heat Pumps Using Puron'K Refrig-

erant for wind baffle construction

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

Step a--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.

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

Step 4_Operating Ambient

The mininmm outdoor operating ambient in cooling mode without
additional accessories is 55°F, and the maximum outdoor operat-
ing ambient in cooling mode is 125°F. The maxinmm outdoor
operating ambient in heating mode is 66°F.

Step 5--Elevate Unit

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

Elevate unit per local climate and code requirements to provide
clearance above estimated snowfall level and ensure adequate
drainage of the unit. Fig. 4 shows unit with accesso W support feet

installed.Useaccessorysnowstandinareaswhereprolonged
freezingtemperaturesareencountered.RefertoInstallationIn-

structionspackagedwithaccessories.

A98533

Fig. 4_Accessory Support Feet

Step 6--Check Indoor Expansion Device

[.q_giilI,

For proper unit operation and reliability, units must be
installed with hard shutoff TXV specifically designed to
operate with Puron,_,P4.Do not use an R-22 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.

FURNACE (;OILS

If TXV installation is required, remove existing AccuRater® from
indoor coi!. Refer to Fig. 5 and 6 and install TXV kit (specifically
designed for PuronJ_0 as follows:

i. Install suction tube adapter.

2. Install liquid flare-to-sweat adapter.

3. Connect external equalizer tube to fitting on suction tube
adapter.

4. Position sensing bulb on horizontal portion of suction tube
adapter. Secure using supplied hardware.

5. Insulate bulb after installation. (See Fig. 6.)

6. Leak check all connections.

FAN COILS
If indoor unit (fan coil) comes factory equipped with a bi-flow

hard shut off TXV specifically designed for Puron_K, no TXV

change is required.
If TXV installation is required, refer to TXV kit Installation

Instructions for details on TXV installation.

Step 7--Check Defrost Thermostat

Check defi'ost thermostat to ensure it is properly located and
securely attached. There is a liquid header with a brass distributor
and feeder tube going into outdoor coil. At the end of 1 of the
feeder tubes, there is a 3/8-in. O.D. stub tube approximately 3 in.

SENSING
BULB

UALIZER

TUBE

EXPANSION
VALVE

A91277

Fig. 5--Typical TXV Installation

long. (See Fig. 7.) The defrost themlostat should be located on stub
tube. Note that there is only 1 stub tube used with liquid header and

on most units it is the bottom circuit.

Step 8--In Long-Line Applications, Install Liquid-Line
Solenoid Valve (LSV)

For reliigerant piping an'angements with equivalent lengths
greater than 50 ft and.or when elevation difference between indoor
and outdoor unit is greater than ±20 It, follow all requirements of
the Long-Line Guideline section in the Application Guideline and
Service Manual Air Conditioners and Heat Pumps Using Pu-
ron'K Refi'igerant.

If required by Long-Line Application Guideline, install LSV kit
Part No. KHALS0401LLS specifically designed for Puron(P_ Heat

Pump. LSV should be installed within 2 ft of outdoor unit with
flow an'ow pointing toward outdoor unit Follow the Installation
Instructions included with accessory kit.

IMPORTANT: Flow arrow must point toward outdoor unit.

i

7/8IN. OD & SMALLER LARGER THAN 7/8 IN. OD

A81032

Fig. 6--Positioning of Sensing Bulb

Step 9--Make Piping Connections

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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.

FEEDER TUBE

STUB TUBE

DEFROST
THERMOSTAT

Fig. 7--Defrost Thermostat Location

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4. Remove Teflon washer from bag and install on open end of
liqnid service valve. (See Fig. 8.)

5. Remove adapter tube from bag and connect threaded nut to
liquid service valve. Tighten nut finger tight, and then using a
wrench, tighten an additional 1/2 turn (15 ft-lb). DO NOT

OVERTIGHTEN!

/_ SWEAT/FLARE

ADAPTER

A97517

Do not leave system open to atmosphere any longer than

minimum required for installation. POE oil in compressor is

extremely susceptible to moisture absorption. Ahvays keep
ends of tubing sealed during installation.

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If ANY rel}igerant tubing is buried, provide a minimum 6 in.
vertical rise to the valve connections at the unit. Do NOT bury
refrigerant tubing lengths greater than 36 in.

To prevent damage to unit or service valves, observe the

following:

1. Use a brazing shield.

2. 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 refi'igerant grade tubing of correct

size and condition. Tubing diameters listed in Table 1 are adequate
for equivalent lengths up to 50 It. For tubing requirements beyond
50 ft, substantial capacity and performance losses can occur.

Follow the recommendations in the Application Guideline and

Service Manual Air Conditioners and Heat Pumps Using Pu-
ron_ Refrigerant to minimize losses. Refer to Table 1 for field
tubing diameters. Refer to Table 2 Ibr accessory requirements.

Refrigerant tubes and indoor coil must be evacuated to 500
microns to minimize contamination and moisture in the system.

PISTON

LIQUID SERVICE VALVE

A01214

Fig. 8--Liquid Service Valve with Sweat Adapter

Tube

REFRIGERANT TUBING AND FILTER DRIER

Connect vapor tubing to fittings on outdoor unit vapor service
valve. Connect liqnid tubing to filter &ier. (See Table 1 and Fig.

9.) Use refrigerant grade tubing. Connect other end of filter drier
to adapter tube on liquid service valve.

FILTER-DRIER

SERVICE

VALVE

OUTDOOR UNIT CONNECTED TO FACTORY-APPROVED

INDOOR UNIT
These outdoor units are carefully evaluated and listed with specific

indoor coils lbr proper system peribrmance.

IMPORTANT: Do not apply indoor coils that are not factory

approved to these units.

INSTALL ADAPTER TUBE

i. Remove plastic retainer holding outdoor piston in liquid

service valve.

2. Check outdoor piston size with matching number listed on unit
rating plate.

3. Locate plastic bag taped to unit containing adapter tube.

A01215

Fig. 9--Filter Drier with Sweat Adapter Tube and

Liquid Tube