American Standard 4A7A6024 Instrucciones de montaje

Since the manufacturer has a policy of continuous product

and product data improvement, it reserves the right to

change design and specifications without notice.

11-AC16D1-3

IMPORTANT — This Document is customer property and is to remain with this unit. Please return to service information pack

upon completion of work.

These instructions do not cover all variations in systems

nor provide for every possible contingency to be met in

connection with installation. All phases of this installa-

tion must comply with NATIONAL, STATE AND LOCAL

CODES. Should further information be desired or should

particular problems arise which are not covered sufficiently for

the purchaser’s purposes, the matter should be referred to your

installing dealer or local distributor.

A. GENERAL

The following instructions cover 4A7A6 Condensing Units. See

special wiring and sequence of operation on page 5.

NOTICE: These outdoor units may be used with indoor

units equipped with Thermostatic Expansion Valve only.

▲ WARNIN

These units use R-410A refrig-

erant which operates at 50% to 70% higher pressures than

R-22. Use only R-410A approved service equipment. Re-

frigerant cylinders are painted a “Rose” color to indicate

the type of refrigerant and may contain a “dip” tube to

allow for charging of liquid refrigerant into the system.

All R-410A systems use a POE oil that readily absorbs

moisturefromtheatmosphere.Tolimitthis“hygroscopic”

action, the system should remain sealed whenever pos-

sible. Never break a vacuum with air and always change

the driers when opening the system for component

replacement.

Check for transportation damage after unit is uncrated. Report

promptly, to the carrier, any damage found to the unit.

To determine the electrical power requirements of the unit, refer

to the nameplate of the unit. The electrical power available must

agree with that listed on the nameplate.

B. LOCATION & PREPARATION OF THE UNIT

1. When removing unit from the pallet, notice the tabs on the

basepan. Remove tabs by cutting with a sharp tool as shown in

Figure 2 (see page 2).

2. The unit should be set on a level support pad at least as large

as the unit base pan, such as a concrete slab. If this is not the

application used please refer to application bulletin

“ALG16-APG**-EN” (* denotes latest revision).

3. The support pad must NOT be in direct contact with any

structure. Unit must be positioned a minimum of 12" from any

wallorsurroundingshrubberytoinsureadequateairflow. Clear-

Condensing Units

Models: 4A7A6024,36,48, & 60B1000A

CAUTION

UNIT CONTAINS R-410A REFRIGERANT!

R-410A OPERATING PRESSURE EXCEEDS THE

LIMIT OF R-22. PROPER SERVICE EQUIPMENT IS

REQUIRED. FAILURE TO USE PROPER SERVICE

TOOLS MAY RESULT IN EQUIPMENT DAMAGE OR

PERSONAL INJURY.

SERVICE

USE ONLY R-410A REFRIGERANT AND

APPROVED POE COMPRESSOR OIL.

INSTALLER'S GUIDE

ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES

TOP DISCHARGE — UNRESTRICTED

5 FT. ABOVE UNIT

PAGE 2 Pub. No. 11-AC16D1-3

INSTALLER'S GUIDE

ance must be provided in front of control box (access panels) &

any other side requiring service access to meet National Electri-

cal Code. Also, the unit location must be far enough away from

any structure to prevent excess roof run-off water from pouring

directly on the unit. Do not locate unit(s) close to bedroom(s).

4. The top discharge area must be unrestricted for at least

five (5) feet above the unit.

5. When the outdoor unit is mounted on a roof, be sure the roof

will support the unit’s weight. Properly selected isolation is

recommended to prevent transmission to the building structure.

6. The maximum length of refrigerant lines from outdoor to

indoor unit should NOT exceed eighty (80) feet.

7. If outdoor unit is mounted above the air handler, maximum

lift should not exceed twenty-five (25) feet (suction line). If air

handler is mounted above condensing unit, maximum lift should

not exceed twenty-five (25) feet (liquid line).

8. Locate and install indoor coil or air handler in accordance

with instruction included with that unit.

C. INSTALLING REFRIGERANT LINES

▲ CAUTION:

Ifusingexisting refrigerant lines

make certain that all joints are brazed, not soldered.

Condensing units have provisions for braze connections.

Pressure taps are provided on the service valves of outdoor unit

for compressor suction and liquid pressures.

The indoor end of the recommended refrigerant line sets may be

straight or with a 90 degree bend, depending upon situation

requirements. This should be thoroughly checked out before

ordering refrigerant line sets.

The gas line must always be insulated.

▲ CAUTION:

In scroll compressor applica-

tions, dome temperatures may be hot. Do not touch top of

compressor, may cause minor to severe burning.

The units are factory charged with the system charge required

when using fifteen (15) feet of connecting line. Unit nameplate

charge is the same.

Final refrigerant charge adjustment is necessary. Use the

Charging Charts in the outdoor unit Service Facts.

1. Determine the most practical way to run the lines.

2. Consider types of bends to be made and space limitations.

NOTE: Largediameter tubing will be verydifficult to rebend once

it has been shaped.

3. Determine the best starting point for routing the refrigerant

tubing — INSIDE OR OUTSIDE THE STRUCTURE.

4. Provide a pull-thru hole of sufficient size to allow both liquid

and gas lines.

5. Be sure the tubing is of sufficient length.

6. Uncoil the tubing — do not kink or dent.

7. Route the tubing making all required bends and properly

secure the tubing before making connections.

8. To prevent a noise within the building structure due to

vibration transmission from the refrigerant lines, the following

precautions should be taken:

a. When the refrigerant lines have to be fastened to floor

joists or other framing in a structure, use isolation type hangers.

b. Isolation hangers should also be used when refrigerant

lines are run in stud spaces or enclosed ceilings.

c. Where the refrigerant lines run through a wall or sill, they

should be insulated and isolated.

d. Isolate the lines from all ductwork.

D. SERVICE VALVE OPERATION

BRASS LIQUID LINE SERVICE VALVE

The Brass Liquid Line Service Valve is factory shipped in the

seated position to hold factory charge. The pressure tap service

port (when depressed) opens only to the field brazing side of the

valve when the valve is in the seated position. The liquid line

valve is not a back seating valve (see WARNING that follows).

▲ WARNIN

Extreme caution should be ex-

ercised when opening the Liquid Line Service Valve.

Turn valve stem counterclockwise only until the stem

contacts the rolled edge. (See Figure 3) No torque is

required.

BASEPAN TAB REMOVAL

LIQUID LINE SERVICE VALVE

Pub. No. 11-AC16D1-3 PAGE 3

INSTALLER'S GUIDE

CAP 1/4 TURN ONLY

COUNTERCLOCKWISE

FOR FULL OPEN

POSITION

VALVE STEM

GAS LINE CONNECTION

UNIT SIDE

OF VALVE

CAP

BODY

COOLING

CORE

PRESSURE TAP PORT

GAS LINE SERVICE VALVE

BRASS GAS LINE SERVICE VALVE

The Brass Gas Line Service Valve is shipped in the closed

position to hold the factory refrigerant charge. The pressure tap

service port (when depressed) opens only to the field brazing side

when the valve is in the closed position.

The Gas Line Service Valve is full open with a 1/4 turn. See

Figure 4.

BRAZING REFRIGERANT LINES

1. Remove lower access cover to access service valves.

2. Before brazing, remove plugs from external copper stub

tubes. Clean internal and external surfaces of stub tubes prior

to brazing.

3. Cut and fit tubing, minimizing the use of sharp 90° bends.

4. Insulate the entire gas line and its fittings.

5. Do NOT allow uninsulated liquid line to come in direct

contact with bare gas line.

6. Precautions should be taken to avoid heat damage to

the pressure tap valve core during brazing. It is recom-

mended that the pressure tap port valve core be removed

and a wet rag wrapped around the valve body.

NOTICE: Use care to make sure that no moisture enters

pressure tap port, while wet rag is being used.

NOTICE: Precautions should be taken to avoid heat

damage to basepan during brazing. It is recommended to

keep the flame directly off of the basepan.

7. Use a Dry Nitrogen Purge and Brazing Alloy without flux

whenbrazing the field line to thecopperfactory connection. Flow

dry nitrogen into either valve pressure tap port, thru the tubing

and out the other port while brazing.

8. Braze using accepted good brazing techniques.

LEAK CHECK

IMPORTANT: Replace pressure tap port valve core be-

fore attaching hoses for evacuation.

After the brazing operation of refrigerant lines to both the

outdoor and indoor unit is completed, the field brazed connec-

tions must be checked for leaks. Pressurize through the service

valve ports, the indoor unit and field refrigerant lines with dry

nitrogen to 300 psi. Use soap bubbles or other leak-checking

methods to see that all field joints are leak-free! If not, release

pressure; then repair!

SYSTEM EVACUATION

NOTE: Since the outdoor unit has a refrigerant charge, the gas

and liquid line valves must remain closed.

1. Upon completion of leak check, evacuate the refrigerant lines

and indoor coil before opening the gas and liquid line valves.

2. Attach appropriate hoses from manifold gauge to gas and

liquid line pressure taps.

NOTE: Unnecessary switching of hoses can be avoided and

complete evacuation of all lines leading to sealed system can be

accomplished with manifold center hose and connecting branch

hose to a cylinder of R-410A and vacuum pump.

3. Attach center hose of manifold gauges to vacuum pump.

4. Evacuate until the micron gauge reads no higher than

350 microns.

5. Close off valve to vacuum pump and observe the micron

gauge. If gauge pressure rises above 500 microns in one (1)

minute, then evacuation is incomplete or system has a leak.

6. If vacuum gauge does not rise above 500 microns in one (1)

minute, the evacuation should be complete.

7. With vacuum pump and micron gauge blanked off, open valve

on R-410A cylinder and charge refrigerant lines and indoor coil

with vapor to tank pressure of R-410A supply.

NOTE: DO NOT VENT REFRIGERANT INTO THE

ATMOSPHERE.

8. Close valve on R-410A supply cylinder. Close valves on

manifold gauge set and remove refrigerant charging hoses from

liquid and gas pressure tap ports.

NOTE: A 3/16" Allenwrenchis required to openliquidlineservice

valve. A 1/4" Open End or Adjustable wrench is required to open

gas line valve. A 3/4" Open End wrench is required to take off the

valve stem cap.

9. The liquid line shut-off valve can now be opened. Remove

shut-off valve cap. Fully insert hex wrench into the stem and

back out counterclockwise until valve stem just touches rolled

edge (approximately five [5] turns) observing WARNING state-

ment on page 2. See Figure 3.

10. Replace liquid service pressure tap port cap and valve stem

cap. These caps MUST BE REPLACED to prevent leaks.

Replace valve stem and pressure tap cap finger tight, then

tighten an additional 1/6 turn.

11. The gas valve can now be opened. Open the gas valve by

removing the shut-off valve cap and turning the valve stem

1/4 turn counterclockwise, using 1/4" Open End or Adjustable

wrench. See Figure 4.

PAGE 4 Pub. No. 11-AC16D1-3

INSTALLER'S GUIDE

12. The gas valve is now open for refrigerant flow. Replace valve

stem cap to prevent leaks. Again, these caps MUST BE RE-

PLACED to prevent leaks. Replace valve stem and pressure tap

capfinger tight, then tightenanadditional1/6turn. See Figure 4.

If refrigerant lines are longer than 15 feet and/or a different

size than recommended, it will be necessary to adjust system

refrigerant charge upon completion of installation. See unit

Service Facts.

E. ELECTRICAL CONNECTIONS

▲ WARNIN

When installing or servicing

this equipment, ALWAYS exercise basic safety precau-

tions to avoid the possibility of electric shock.

1. Power wiring and grounding of equipment must comply with

local codes.

2. Power supply must agree with equipment nameplate.

3. Install a separate disconnect switch at the outdoor unit.

4. Ground the outdoor unit per local code requirements.

5. Provide flexible electrical conduit whenever vibration trans-

mission may create a noise problem within the structure.

6. The use of color coded low voltage wire is recommended to

simplify connections between the outdoor unit, the thermostat

and the indoor unit.

Table 1 — NEC Class II Control Wiring

7. Table 1 defines maximum total length of low voltage wiring

from outdoor unit, to indoor unit, and to thermostat.

8. Mount the indoor thermostat in accordance with instructions

included with the thermostat. Wire per appropriate hook-up

diagram (included in these instructions).

F. COMPRESSOR START-UP

After all electrical wiring is complete, SET THE THERMOSTAT

SYSTEMSWITCH IN THE OFFPOSITION SO COMPRESSOR

WILL NOT RUN, and apply power by closing the system main

disconnect switch. This will activate the compressor sump heat

(where used). Do not change the Thermostat System Switch

until power has been applied for one (1) hour. Following this

procedure will prevent potential compressor overload trip at the

initial start-up.

G. OPERATIONAL AND CHECKOUT PROCEDURES

Final phases of this installation are the unit Operational and

Checkout Procedures which are found in this instruction on

page 8. To obtain proper performance, all units must be operated

and charge adjustments made in accordance with procedures

found in the Service Facts.

24 VOLTS

WIRE SIZE MAX. WIRE LENGTH

18 AWG 150 FT

16 AWG 225 FT.

14 AWG 300 FT.

H. ELECTRIC HEATERS

Electric heaters, if used, are to be installed in the air handling

device according to the instructions accompanying the air han-

dler and the heaters.

I. START CONTROL

Some models have quick start components which are factory

installed. For models that do not have factory installed start

components, provisions are made for a field installed start kit

accessory. When adding an accessory, follow the instructions

provided with the kit.

J. OUTDOOR THERMOSTAT

An outdoor thermostat TAYSTAT250A may be field installed.

For data, see wiring diagram attached to unit and instruction

sheet packaged with outdoor thermostat.

K. SEACOAST SALT SHIELD

The4A7A6 models are shippedwith a black SeacoastSalt Shield.

Removal of the shield will potentially shorten the life of the joints

in the outdoor coil.

L. TROUBLESHOOTING

REFRIGERANT CIRCUIT

Liquid Pressure Too High

Liquid Pressure Too Low

Suction Pressure Too High

Suction Pressure Too Low

Liquid Refrig. Floodback TXV System

Liquid Refrig. Floodback Capillary Tube System

I.D. Coil Frosting

Compressor Runs Inadequate or No Cooling

ELECTRICAL

Compressor & O.D. Fan Do Not Start

Compressor Will Not Start But O.D. Fan Runs

O.D. Fan Won’t Start

Compressor Hums But Won’t Start

Compressor Cycles on IOL

I.D. Blower Won’t Start

SYSTEM FAULTS

P - Primary Causes S - Secondary Causes

PSPSS S S S

POWERSUPPLY

HIGHVOLTAGEWIRING

COMPR. IOL

RUNCAPACITOR

STARTCAPACITOR

STARTRELAY

CONTACTORCONTACTS

LOWVOLTAGEWIRING

CONTROLTRANSFORMER

CONTACTORCOIL

LOWVOLTAGEFUSE

STUCKCOMPRESSOR

INEFFICIENTCOMPRESSOR

REFRIGERANT UNDERCHARGE

REFRIGERANT OVERCHARGE

EXCESSIVEEVAP. LOAD

NONCONDENSABLES

RESTRICTEDO.D. AIRFLOW

O.D. AIR RECIRCULATION

TXVSTUCKOPEN

SUPERHEAT

RESTRICTEDI.D. AIRFLOW

REF. CIRCUIT RESTRICTIONS

O.D. FANSPEEDSWITCH

TROUBLESHOOTING CHART — WHAT TO CHECK

Pub. No. 11-AC16D1-3 PAGE 5

INSTALLER'S GUIDE

FIELD HOOK-UP DIAGRAMS FOR 4A7A6 MODELS ONLY

Notes:

1. Be sure power supply agrees with equipment nameplate.

2. Power wiring and grounding of equipment must comply with local codes.

3. Low voltage wiring to be No. 18 AWG minimum conductor.

4. If outdoor thermostat (ODT) is not used, connect W2 to W3

(See Note B below).

5. Be sure the jumper between “R” and “BK” is cut or removed.

6. With “O” and “Y/ Y2” energized, indoor fan is at 80% airflow.

7. With “O”, “Y/ Y2” and “BK” energized, indoor fan is at 100% airflow.

LEGEND

FACTORY WIRING FIELD WIRING

REQUIRED WIRING

Refer to Field Hook-up Diagrams above.

4A7A6 units require 80% airflow with “Y1” (first stage),

100% airflow with “Y2” (second stage).

Note A – The installer must jumper at the LVTB “R” to “O”.

Note B – Cut /remove the factory installed “BK” jumper (See Figures 1 & 2)

Connect “Y1” from thermostat to “Y/Y2” at VS Air Handler/VS Furnace to “Y1” at Outdoor Unit.

Connect “Y2” from thermostat to “BK” at VS Air Handler/VS Furnace to “Y2” at Outdoor Unit.

G O B W3

RBK

T Y Ylo

Ylo

Jumper

OFF

W14

BK JUMPER

BLK/TWIN

YLO

The Factory installed jumper between

“R” and “BK” on the Furnace circuit

board must be cut.

See Note B.

FURNACEAIR HANDLER

See

Note A

See

Note A

See Note B

PAGE 6 Pub. No. 11-AC16D1-3

INSTALLER'S GUIDE

From Dwg. D152862 Rev. 17

4A7A6 OUTLINE DRAWING

NOTE: ALL DIMENSIONS ARE IN MM (INCHES).

MODELS BASE A B C D E F G H J K

4A7A6024B 3 933 (36-3/4) 829 (32-5/8) 756 (29-3/4) 5/8 5/16 143 (5-5/8) 92 (3-5/8) 210 (8-1/4) 79 (3-1/8) 508 (20)

4A7A6036B 4 841 (33-1/8)) 946 (37-1/4) 870 (34-1/4) 3/4 3/8 152 (6) 98 (3-7/8) 219 (8-5/8) 86 (3-3/8) 508 (20)

4A7A6048B 4 1045 (41-1/8) 946 (37-1/4) 870 (34-1/4) 7/8 3/8 152 (6) 98 (3-7/8) 219 (8-5/8) 86 (3-3/8) 508 (20)

4A7A6060B 4 1045 (41-1/8) 946 (37-1/4) 870 (34-1/4) 7/8 3/8 152 (6) 98 (3-7/8) 219 (8-5/8) 86 (3-3/8) 508 (20)

Pub. No. 11-AC16D1-3 PAGE 7

INSTALLER'S GUIDE

MOUNTING HOLE LOCATION

NOTE: ALL DIMENSIONS ARE IN MM (INCHES).

NOTE: For model base size, see table on page 6. From Dwg. 21D152989 Rev. 0

PAGE 8 Pub. No. 11-AC16D1-3

P.I. 1/05

INSTALLER'S GUIDE

CHECKOUT PROCEDURE

After installation has been completed, it is recommended that the entire system be checked against the

following list:

1. Refrigerant Line, Leak checked........................................................................................................... [ ]

2. Suction Lines and Fittings properly insulated ...................................................................................... [ ]

3. Have all Refrigerant Lines been secured and isolated properly? ........................................................ [ ]

4. Have passages through masonry been sealed? If mortar is used, prevent mortar from

coming into direct contact with copper tubing...................................................................................... [ ]

5. Verify tightness of all electrical connects ............................................................................................. [ ]

6. Observe outdoor fan during on cycle for clearance and smooth operation ......................................... [ ]

7. Indoor coil drain line drains freely. Pour water into drain pan.............................................................. []

8. Supply registers and return grilles open and unobstructed ................................................................. [ ]

9. Return air filter installed....................................................................................................................... [ ]

10. Thermostat thermometer is accurate. Check against a reliable thermometer. Adjust

per instructions with thermostat........................................................................................................... [ ]

11. Is correct speed tap being used? (Indoor blower motor) ..................................................................... [ ]

12. Operate complete system in each mode to insure safe operation. ..................................................... [ ]

INDOOR THERMOSTAT

SWITCH SETTING

Fan Switch

TO CHECK Off Cool Heat Auto On

COMPONENT OPERATION

Indoor Outdoor Compressor

Comp. Furnace

Blower Fan Runs Sump Heat

Runs Runs Heater Comes On

Step

No.

CHECKOUT PROCEDURE WITH MAIN POWER DISCONNECTS CLOSED (ON)

Also set thermostat dial to call for cooling or heating as necessary.

Check only necessary if heating unit is used for indoor section and wiring has been disturbed during installation of cooling

equipment.

When applicable.

1 Sump Heat X X X

2 Indoor Fan Operation X X X X

3 Cooling Operation X X X X X X

4 Checking Performance X X X X X X

& Charge USE CHARTS ATTACHED TO O.D. UNIT

5 Heating

XX X X X

6 Inform owner on how to operate system and what to expect of it. At the same time deliver Owner’s Use and Care Booklet.

Technical Literature - Printed in U.S.A.

American Standard Inc.

Troup Highway

Tyler, TX 75707-9010

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