Amana Bottom freezer refrigerator User manual

Brand: Amana

Model: Bottom freezer refrigerator

Category: Side-by-side fridge-freezers

Type: User manual

Service

Service Manual for

Amana

This manual is to be used by qualified appliance

technicians only. Amana does not assume any

responsibility for property damage or personal

injury for improper service procedures done by an

unqualified person.

Bottom Mount Refrigerators

Refer to “Technical Sheet”, part #12074201

for values and wiring schematics.

Raytheon

Appliances

RS1200001

Revision 0

November 1996

Base manual covers 84” tall

bottom mount refrigerators.

RS1200001 2 November 1996

Safety Symbols, Words, and Labels

DANGER

Immediate hazards which will result in

severe personal injury or death.

WARNING

Hazards or unsafe practices which could

result in severe personal injury or death.

Caution

Hazards or unsafe practices which could

result in minor personal injury or product or

property damage.

Amana Refrigeration, Inc. is not responsible for

personal injury or property damage resulting from

improper service. Review all service information

before beginning repairs.

Warranty service must be performed by an

authorized Amana

technician. Amana Refrigeration,

Inc. also recommends contacting an authorized

Amana

technician if service is required after

warranty expires. Contact (319) 622-5511 for further

assistance.

Electrical Requirements

WARNING

Electrical Grounding Instructions -- This

refrigerator is equipped with a three-prong

(grounding) plug for protection against

possible shock hazards. If a two-prong wall

receptacle is encountered, contact a qualified

electrician and have the two-prong wall

receptacle replaced with a properly grounded

three-prong wall receptacle in accordance

with the National Electrical Code.

Refrigerator is designed to operate on a

separate 103 to 126 volt, 15 amp., 60 cycle

line.

Do not under any circumstances cut or

remove the round grounding prong from

the plug. Refrigerator must be grounded

at all times. Do not remove warning tag

from power cord.

WARNING

Do not use a 2 prong adapter.

Do not use an extension cord.

Safety and Electrical Information

Grounding Information

Standard color for ground wires is green or green with

yellow striping. Ground wires are not to be used as

conductors carrying current. Compressor, condenser

fan motor, evaporator fan motor, defrost timer,

temperature control, and ice maker are grounded

through an individual wire attached to electrical

component and another part of refrigerator. Ground

wires should not be removed from individual

components while servicing unless component is

removed and replaced. It is extremely important to

replace all grounds prior to completing service. When

nib-headed screw is used to complete grounding

circuit, replace screw with a like screw.

November 1996 3 RS1200001

Contents

Safety and Electrical Information

Safety Symbols, Words, and Labels ....................... 2

Electrical Requirements .......................................... 2

Grounding Information............................................. 2

Installation Instructions ............................................... 5

Sound Information ...................................................... 9

System Diagnosis

Pressure and Relationship Chart........................... 10

Refrigerant Overcharge Symptoms .......................11

Refrigerant Shortage Symptoms............................11

Restriction Symptoms ............................................11

Air in System Symptoms....................................... 12

Low or High Ambient Temperature Installation .........

Symptoms.............................................................. 12

Heat Load Symptoms............................................ 12

HFC134a Service Information

Health, Safety, and Handling................................. 13

Comparison of CFC12 and HFC134a Properties.. 13

Service Equipment ................................................ 14

Drier Replacement ................................................ 14

Replacement Service Compressor ....................... 15

Refrigerant Charge ................................................ 15

Leak Testing........................................................... 15

Evacuation and Charging ...................................... 15

Refrigerant Flow ....................................................... 17

Air Flow ..................................................................... 18

Machine Compartment Assembly ............................ 19

Component Function and Testing............................. 20

Electronic Functional Description ............................. 25

Electronic Testing Mode ........................................ 26

Forced Defrost Activation .................................. 26

Forced Compressor Activation........................... 26

Open Thermistor Detect..................................... 26

Key Board Functions ............................................. 26

Display On Pad .................................................. 26

Warmer Pad ....................................................... 26

Colder Pad ......................................................... 26

Freezer Temp Pad.............................................. 27

Ref Temp Pad .................................................... 27

Vacation Pad ...................................................... 27

Max Ref Pad ...................................................... 27

Max Frz Pad....................................................... 27

Alarm Off Pad .................................................... 27

Display Off Pad .................................................. 27

Door Open Alarm ............................................... 27

High Temp .......................................................... 27

Temperature Control Operation............................. 27

Adaptive Defrost Operation................................... 28

Power Up Condition............................................... 28

EEPROM Update in Control Memory ................... 28

Accessing Program Mode .................................. 28

Operation............................................................ 29

Mode A Functions .............................................. 29

Mode B Functions .............................................. 29

Exiting Program Mode ....................................... 30

Refrigeration and Defrost Component Checks .........

Made at High Voltage Board ................................. 32

Circuitry ................................................................. 33

Freezer Compartment Refrigeration ......................

Cycle Circuitry .................................................... 33

Fresh Food Compartment Refrigeration ................

Cycle Circuitry .................................................... 33

Fresh Food and Freezer Compartment .................

Refrigeration Cycle Circuity ............................... 33

Adaptive Defrost Circuitry .................................. 33

Door Disassembly Procedures

Air Discharge Grille ............................................... 34

Refrigerator Door................................................... 34

Freezer Drawer and Basket................................... 34

Door Stops............................................................. 34

Door Handles......................................................... 34

Door Gaskets......................................................... 34

Inner Door Liners and Outer Door Shells .............. 34

Refrigerator Door Switch ....................................... 34

Cabinet Components Disassembly Procedures

Refrigerator Fan .................................................... 35

Refrigerator Light Switch ....................................... 35

Refrigerator Light Socket....................................... 35

Center Mullion ....................................................... 35

Freezer Switches and Thermistor Panel ............... 35

Freezer Evaporator Cover..................................... 35

Defrost Thermostat................................................ 35

Evaporator Defrost Heater .................................... 35

Evaporator ............................................................. 35

Evaporator Fan Blade ........................................... 35

Evaporator Fan Motor ........................................... 35

Front and Rear Roller Assembly ........................... 35

Water Valve ........................................................... 35

Condensate Drain Pan .......................................... 36

Shelf Support Ladders........................................... 36

Chef's Pantry Assembly ........................................ 36

Refrigerator Thermistor ......................................... 36

Machine Compartment Disassembly Procedures

Machine Compartment Access ............................. 37

Low and High Voltage Board and Showroom Switch

Access ................................................................... 37

Low Voltage Board................................................. 37

High Voltage Board................................................ 37

Compressor, Condenser, and Condenser .................

Fan Access ............................................................ 37

Capacitor ............................................................... 37

Overload and Relay............................................... 37

Condenser Fan Blade............................................ 37

Condenser Fan Motor............................................ 37

Precondenser Pan Loop ........................................ 37

Compressor ........................................................... 37

Condensate Drain Pan .......................................... 38

Condenser ............................................................. 38

Power Disconnect Switch ...................................... 38

Showroom Switch.................................................. 38

Typical External Sweat Pattern ................................ 39

Troubleshooting Guide.............................................. 40

RS1200001 4 November 1996

Ice Maker

Operation ............................................................... 42

Specifications ........................................................ 42

Testing Procedures ................................................ 42

Disassembly Procedures ....................................... 43

Cover.................................................................. 43

Module, Motor, and Support Assembly .............. 43

Shut-off Arm ....................................................... 43

Module and Heater Assembly ............................ 43

Fill Cup ............................................................... 43

Ejector Blades or Stripper .................................. 44

Accessing Control Box ....................................... 44

Water Fill Adjustment............................................ 44

Water Problems..................................................... 45

Temperature Problems .......................................... 45

Thermostat ............................................................ 45

Wiring Harness ...................................................... 45

Water Valve ........................................................... 46

Wiring Harness ...................................................... 46

Ice Maker Troubleshooting Chart ............................. 47

Ice Maker Wiring Diagram and Parts Layout ........... 50

Trim Kit Installation Instructions

B136CKR1 and B136CKL1 Custom Handle Kit.... 51

B136SPK1 1/4” Facia Front Enclosure Kit............ 58

B136SPK2 3/4” Side Panel Kit.............................. 65

Contents

November 1996 5 RS1200001

Installation Instructions

Securing

WARNING

To avoid severe personal injury or property

damage from refrigerator tipping over, do not

open more than one door at a time, until

refrigerator has been secured to the structure.

Secure refrigerator to structure using lag bolts

located in the refrigerator's machine

compartment.

1. Locate and mark 2 wall studs to mount 2x4. See

"Installation Specifications". Do not cover electrical

outlet with 2x4.

Locate and predrill 1/4" holes in 2x4. Countersink

2x4 for bolt heads using a wood bit. See "Installation

Specifications".

2. Remove 2x4 mounting board from top rear of

refrigerator. Bolt 2x4 securely to wall studs with

supplied bolts. If application does not have studs

such as a framed wall mount to wall, not surface,

using a minimum 1/4" diameter fasteners (not

supplied). If cabinets are deeper than 24" mounting

board must be shimmed and structurally secured to

the 2 x 4 board. Longer bolts are required to shim

mounting board.

3. To avoid water line damage, verify water line is

secure so refrigerator does not run over water line.

See "Installation Specifications" for water line

location.

4. Repair any loose flooring in cutout.

5. Tape door and drawer shut with masking tape.

Before moving the refrigerator in place, confirm the

finished dimensions, electrical and plumbing locations,

and minimum door and drawer clearances are accurate.

6. Position refrigerator in front of cutout.

7. Remove air grille assembly by lifting center blade.

Uncrating

WARNING

To avoid severe personal injury or property

damage from refrigerator tipping over, 2 or

more people are required to install

refrigerator. Take caution when removing

refrigerator from skid. Do not drop refrigerator.

Do not open more than one door at a time,

until refrigerator has been secured to

structure. Refrigerator is top heavy and easily

tips.

Caution

To avoid personal injury, wear gloves

when performing any installation procedure.

The 2 x 4 mounting board, for securing refrigerator to

wall, is attached to top rear of refrigerator. Save

cardboard to protect walls when installing refrigerator.

1. Remove top and bottom strap.

2. Remove top cap.

3. Cut along dashes on carton rear with a utility knife

extended 1/4".

4. Remove carton, exterior packaging, and tape from

lag screws. Do not remove nylon cord from power

cord.

5. Remove shipping brackets from skid by removing 4

bolts with a 7/16" socket head screwdriver.

6. Strap refrigerator on cart. To prevent doors from

opening, tilt refrigerator to handle side. Remove

refrigerator from skid.

7. To avoid floor damage, use protective material.

Caution

To avoid property damage, protect soft vinyl

or other flooring with protective material when

moving refrigerator. Verify wheels are clean

before placing refrigerator on flooring.

Center air

grille blade

Air grille

RS1200001 6 November 1996

Installation Instructions

8. Remove (4) 1/4" screws with a magnetic extended

screw driver.

9. Pull air grille assembly forward.

10. Verify operation by plugging in power cord. Power

switch will be shipped in the on position and the

showroom switch will be shipped in the off position.

Display should flash. Press any key. There is a 6

minute delay before refrigerator starts. Verify

position of each switch if there is no power to

refrigerator.

11. Pull end of nylon cord around refrigerator side (side

without 1/4" panel installed, if any) level with top of

refrigerator door. Tape cord in place.

WARNING

To avoid electrical shock which can cause

severe personal injury or death, disconnect

power to refrigerator using power switch

before performing any installation procedure.

After performing installation procedure,

connect power using power switch.

Air grille

assembly

1/4" screws

Showroom

switch

Power

switch

12. Roll refrigerator into cutout to within 3" of being

flush with kitchen cabinets. To avoid kitchen cabinet

damage, place cardboard between kitchen cabinets

and refrigerator. Push cardboard back with

refrigerator and remove cardboard when refrigerator

is in place. Remove power cord slack by pulling

nylon cord straight out while pushing refrigerator

completely into place. Power and nylon cord will

rest along refrigerator side.

13. Level refrigerator by turning front and rear leveling

wheel bolts clockwise to raise refrigerator and

counterclockwise to lower refrigerator. Rotate

stabilizing legs until firmly in place against floor.

14. Align refrigerator with sides of kitchen cabinets

using leveling bolts.

15. Secure lag bolts by removing center air grille blade.

Screw lag bolts securely into 2x4 mounting board

using a magnetic 6" extension socket. See

"Installation Specifications".

16. Push extra nylon cord back in along side of

refrigerator out of sight or cord can be flush with

refrigerator.

Pull nylon

cord straight

out

Lag bolts

Power cord

must rest

as shown

November 1996 7 RS1200001

Installation Instructions

Door Panel Installation

Panels must not weigh more than 50 pounds per door.

Refrigerator Door 3/4" Raised Panel

1. Slide out handle screw insert and remove handle

by removing screws with a Phillips

screwdriver.

2. Align panel brackets (supplied) with center edge

of panel. Install brackets using 1/4" screws

(supplied).

3. If base panel is less than 1/4" use plastic

shims (supplied). Shims go between bracket and

wood to space panels to desired depth.

4. Drive low profile screws (supplied) with

Phillips screwdriver.

• Panel brackets must be exactly flush to 1/16"

inboard of panel edge.

• For ease of panel installation 2 people are

required to lift and guide panel into trim.

• Install 1 panel at a time.

5. Align panel in trim and push evenly. For

smoother installation apply bar soap on door

trim and refrigerator trim. If panel binds loosen

top or side door trim. Adjust panel and retighten.

6. Install handle with screws. Install screw strip

(supplied) by starting in one corner and pushing

the length of the strip down.

Handle

Refrigerator Door

Water Connection

The garden hose fitting, compression nut, and sleeve

are located in the literature packet. Amana

Clean

'n Clear

™

Bayonet Style Water Filtration System

WF60 is shipped in crisper drawer. See water filter

installation and operating instructions for

specifics.

1. Flush air and impurities from water line by

turning on water supply and running a pint or

more of water into a bucket.

2. Remove plastic cap from water valve fitting.

Connect copper tubing to water valve with

brass nut and brass sleeve. Insert copper tubing

completely into water valve inlet port. Connect

brass nut on copper tubing to water valve inlet

port fitting. Confirm copper tubing is secure by

pulling on copper tubing.

3. Turn on water supply to refrigerator and check

forleaks. Turn off water supply to

refrigerator and correct any leaks. Repeat

this process until no leaks exist. Completely

turn on water supply to refrigerator.

4. Verify drain pan is installed and aligned.

5. Replace toe grille with air vents to the top.

Kitchen flooring must allow toe grille to be

removed. See "Installation Specifications" for

height clearance. See "Custom Finishing

Options" when using a custom toe grille.

Clip

Toe grille

Air vents

Screws

Handle screw

insert

RS1200001 8 November 1996

Installation Instructions

Freezer Door 3/4" Raised Panel

1. Slide out handle screw insert and remove handle

by removing screws with a Phillips

screwdriver. Handle is in 2 pieces, reinstall if

pieces come apart.

2. 1/2" x 3 1/2" notch is required on hinge side.

3. Remove top handle trim and 1 side trim piece for

ease of installation.

4. Align panel brackets and screws.

5. Align panel in trim and push evenly. Start at one

end and work across. For smoother installation

apply bar soap on door trim and freezer trim. If

panel binds loosen top or side door trim. Adjust

panel and retighten.

6. Install handle with screws. Install screw strip

(supplied) by starting in one corner and pushing

the length of the strip down.

Door Stop Adjustment

1. Remove center grille blade from top air grille.

2. Remove top air grille by removing (4) 1/4” screws

with a magnetic screw driver. Pull assembly

forward.

3. Open refrigerator door so door stop arm and

shoulder screw are accessible. Shoulder

screws should be in 110° door opening position.

4. Remove shoulder screw and place shoulder

screw

in the 90° or 120° door opening position.

Freezer Door

120° door

opening

position

110° door

opening

position

90° door

opening

position

Door stop arm

Shoulder

screw

Hinge Adjustment

Verify proper door alignment. Wait until panels are

installed for door settlement. Only the top hinge is

adjustable.

Adjust top hinge by completing the following:

1. Remove air grille blade and air grille assembly.

2. Loosen top hinge screws.

3. Align refrigerator door by lifting.

4. Tighten screws.

5. Install air grille.

6. Replace air grille assembly.

Interior Setup

1. Remove interior packaging.

2. Turn shelves upright.

3. Move dairy module to desired position on

refrigerator door. See "Model Diagram".

4. Twist cardboard in ice bin to release freezer

tray.

5. Remove literature packet from freezer tray and

give to consumer. Complete "Installation

Checklist" with consumer.

Top hinge

screws

Screws

Handle screw

insert

Handle

November 1996 9 RS1200001

Sound Information

Normal Operating Sounds

This new refrigerator may be replacing a differently

designed, less efficient or smaller refrigerator.

Today’s refrigerators have new features and are more

energy efficient. As a result, certain sounds may be

unfamiliar. These sounds are normal and will soon

become familiar. These sounds also indicate the

refrigerator is operating and performing as designed.

• Freezer and fresh food fan air rushes and whirs.

• Sealed system (evaporator and heat exchanger)

refrigerant flow gurgles, pops or sound like boiling

water.

• Defrost heater sizzles, hisses or pops.

• Condenser fan air rushes and whirs.

• Compressor has a high pitched hum or pulsating

sound.

• Ice cubes from ice maker drop into ice bucket.

• Ice maker water valve hookup buzzes when ice

maker fills with water. This occurs whether or not

refrigerator is connected to water supply. If

refrigerator is not connected to water supply, stop

sound by raising ice maker arm to off position.

• Foam insulation is very energy efficient and has

excellent insulating capabilities. However, foam

insulation is not as sound absorbent as previously

used fiberglass insulation.

RS1200001 10 November 1996

System Diagnosis

Pressure and Relationship Chart

Condition Suction

Pressure

Variation

from Normal

Head Pressure

Variation from

Normal

T1 Inlet

Temperature

Variation from

Normal

T2 Outlet

Temperature

Variation from

Normal

T3 Suction

Temperature

Variation from

Normal

Wattage

Variation from

Normal

Refrigerant

Overcharge

Increase Increase Warmer Warmer Colder Increase

Refrigerant

Shortage

Decrease

Decrease or Increase

See "Refrigerant

Shortage Symptoms"

Colder Warmer Warmer Decrease

Partial

Restriction

Decrease

Decrease or Increase

See "Restriction

Symptoms"

Colder Warmer Warmer Decrease

Air in System

Near Normal Increase Warmer Warmer Warmer Increase

Low Ambient

Installation

(Reverse for

High Ambient

Installation)

Decrease Decrease Colder Warmer Warmer Decrease

Additional

Heat Load

Increase Increase Warmer Warmer Warmer Increase

Inefficient

Compressor

Increase Normal or Decrease Warmer or Colder Warmer Warmer Decrease

November 1996 11 RS1200001

System Diagnosis

Refrigerant Overcharge Symptoms

• Above normal freezer temperature.

• Compressor running continuously.

• Freezing in refrigerator due to Chef’s Pantry

™

.• High suction and head pressure.

• High wattage.

• Warm evaporator inlet and outlet temperature.

• Below ambient suction tube temperature. Check for

separated heat exchanger when suction temperature

is colder than ambient.

• Refrigerant will flood out causing suction line to frost

or sweat, if defrost system fails and cooling coil is not

defrosted. Correct problem instead of purging

refrigerant.

• Freezer colder than necessary (normal package

temperature is 0° to 2°F).

• Evaporator fan motor not running.

Refrigerant Shortage Symptoms

• Rise in refrigerator and freezer temperatures.

Warm beverages will be first indication of

possible refrigerant shortage. Frozen meats and

vegetables will not thaw immediately. Some freezing

may occur in refrigerator section due to additional run

time because of Chef’s Pantry

™

. Capillary line will not

have full column of liquid with refrigerant shortage. A

noticeable hissing sound in evaporator will be heard.

Hissing should not be mistaken for regular refrigerant

boiling sounds.

• Long or continuous run time.

• Traces of oil caused by leak or cracked refrigerant

line.

• Lower than normal wattage.

• Compressor will feel hot due to heat generated by

motor windings from continuous running. Compressor

will not be as hot as it would be with full charge and

long run times caused by reasons such as dirty

condenser.

• Condenser will feel room temperature.

• Capillary tube will feel warmer than normal.

• If high side leak, both gauges will show lower than

normal readings. As charge becomes less, readings

will lower. Suction pressure gauge will probably

indicate a vacuum.

• If low side leak, suction pressure gauge will show

lower than normal readings, probably in a vacuum.

Head pressure gauge will show higher than normal.

Readings will probably rise because of air drawn in

through leak is compressed by compressor and

accumulates in high side (condenser) of system.

• Partial frosting of evaporator.

Restriction Symptoms

• Refrigeration cooling occurs on low pressure side of

partial restriction.

• Total restriction will stop circulation of refrigerant and

no cooling will occur.

• Touch refrigeration lines. Most common place for

restriction is at drier filter or capillary tube inlet or

outlet.

• If partial restriction there will be temperature

difference at restriction point. Evaporator side will be

cooler. In most cases, frost and/or condensation will

be present. Longer time is required for system to

equalize.

• Kinked line will cause restriction. Visually check entire

system for kinks.

• Slight restriction will give same indications as

refrigerant shortage with lower than normal back

pressure, head pressure, wattage, and warmer

temperatures.

• If total restriction is on discharge side of compressor,

higher than normal head pressures and wattages will

occur. This is only true while low side is being pumped

out and if restriction was between compressor and

first half of condenser.

Diagnose restriction by completing the following:

1. Discharge system.

2. Replace drier-filter.

3. Evacuate and recharge system with specified

refrigerant charge.

If refrigerator performs normally, the following

conditions may exist:

• refrigerant loss

• partially restricted drier

• moisture in system

If refrigerator performs as previously described,

capillary line or condenser may be restricted. Locate

and correct restriction point.

Restriction reduces refrigerant flow rate and heat

removal rate. Total restriction may be caused by

moisture, poorly soldered joint, or solid contaminants

in system. Moisture freezes at evaporator inlet end of

capillary tube. Solid contaminants collect in drier.

Wattage drops because compressor is not circulating

normal amount of refrigerant.

If restriction is on low side suction, pressure will be in

a vacuum and head pressure will be near normal. If

restriction is on high side, suction pressure will be in a

vacuum and head pressure will be higher than normal

during pump out period. In both cases, it will take

longer than 10 minutes for head pressure to equalize

with low side after compressor stops.

RS1200001 12 November 1996

System Diagnosis

Air in System Symptoms

Air in system can be caused by low side leak or

improper servicing. If low side leak occurs,

temperature control will not achieve temperatures

and compressor will run continuously. Compressor

will eventually pump low side into a vacuum, drawing

air and moisture into system. Air and R134a do not

mix. Air pressure will be added to normal head

pressure, resulting in higher than normal head

pressures.

Determine if air is present by reading head pressure

gauge with refrigerator off and evaporator and

condenser at same temperature. Verify temperature

on condenser outlet tube. Temperature should be

within 3° or 4°F of what "Pressure and Temperature

Relationship Chart" shows for a given idle head

pressure. If temperature of condenser outlet is

considerably lower than idle head pressure of gauge,

air is in system.

Diagnose air in system by completing the following:

1. Thoroughly check for leaks.

2. Correct leak source. Do not attempt to purge air

off. This could result in an undercharged system.

3. Discharge system.

4. Replace drier-filter.

5. Evacuate and recharge system with specified

refrigerant charge.

Low or High Ambient Temperature

Installation Symptoms

Lower ambient air temperature reduces condensing

temperature and temperature of liquid entering

evaporator. Increase in refrigeration due to operation

in lower ambient results in decrease in power

consumption and run time. At lower ambients there is

reduction in cabinet heat leak which is partially

responsible for lower power consumption and run

time.

An increase in refrigeration will not occur below

certain minimum ambient temperature. Temperature

varies with type and design of refrigerator.

Ambient temperatures lower than 55°F will affect

efficiency. The higher the ambient temperature, the

higher the head pressure must be to raise the high

side refrigerant temperature above condensing

medium. Head pressure will be higher as ambient

temperature raises. Refrigerators installed in ambient

temperatures lower than 55°F will not perform

effeciently because system pressures are generally

reduced and unbalanced. Lower head pressure forces

less liquid refrigerant through capillary line, resulting

in symptoms of refrigerant shortage. The lower the

ambient temperature, the more pronounced the

condition.

When ambient temperature is below cut-in of

temperature control, compressor will not operate.

Drain traps will freeze in ambient temperatures of

32°F.

Heat Load Symptoms

Increased heat load can result from addition of large

supply of foods, excessive door openings, poor door

sealing, interior light remaining on, etc.

Increased heat being absorbed by refrigerant in

evaporator will affect temperature and pressure of

gas returning to compressor. Refrigerator and freezer

temperatures, power consumption, discharge, and

suction pressures are all affected by heat load.

Pressures will be higher than normal under heavy

heat load.

November 1996 13 RS1200001

HFC134a Service Information

HFC134a is alternative refrigerant for CFC12.

HFC134a has an ozone depletion potential (ODP)

factor of 0.0 and a global warming potential (GWP)

factor of 0.27. HFC134a is not flammable and has

acceptable toxicity levels. HFC134a is not

interchangeable with CFC12. There are significant

differences between HFC134a and CFC12 which

must be considered when handling and processing

refrigeration system.

Health, Safety, and Handling

Health, safety and handling considerations for

HFC134A are virtually no different than those for

CFC12.

Health, Safety, and Handling CFC12 HFC134a

Allowable overall exposure limit 1,000 ppm Same

Vapor exposure to skin No effect Same

Liquid exposure to skin Can cause frostbite Same

Vapor exposure to eye Very slight irritant Same

Liquid exposure to eye Can cause frostbite Same

Above minimum exposure limit Can cause Asphyxiation, Same

Tachycardia, and Cardia

Arrhythmias

Safety and handling Wear appropriate skin and eye Same

protection. Use with adequate

ventilation.

Spill management Remove or extinguish ignition or Same

combustion sources. Evacuate

or ventilate area.

Fire and explosion hazards May decompose if contact with

flames and heating elements.

Container may explode if heated

due to resulting pressure rise.

Combustion products are toxic.

Storage conditions Procedures/rules for CFC12 Same

also apply for HFC134a

Disposal procedures Recycle or reclaim Same

Comparison of CFC12 and HFC134a

Properties

Properties/Characteristics CFC12 HFC134a

Ozone Depletion Potential (ODP) 1.0* 0.0*

Global Warming Potential (GPW) 3.2* 0.27*

Molecular weight 121 102

Boiling point at 1 atmosphere -22°F (-30°C) -15°F (-26°C)

Vapor pressure at 77°F (25°C) 80 psig 82 psig

Liquid density at 77°F (25°C) 82 lb/ft3 75 lb/ft3

Flammability No No

High-side system operating HFC134a approximately 3 psig

Pressure at 65°F (18°C) ambient higher than CFC12

Low-side system operating HFC134a approximately 2 psig

Pressure at 65°F (18°C) ambient lower than CFC12

* Compared to CFC 11 = 1

Caution

To minimize contamination, exercise extreme

care when servicing HFC134A sealed systems.

• No trace of other refrigerants is allowed in HFC134a

systems. Chlorinated molecules in other refrigerants

such as CFC12, etc. will lead to capillary tube

plugging.

• Ester oil is used in HFC134a systems. Do not use

mineral oil. HFC134a and mineral oils cannot be

mixed. If mineral oils were used in HFC134a systems,

lubricant would not return to compressor and would

cause early compressor failure. If significant amount

of oil has been lost from compressor, replace oil

rather than adding oil.

• Ester oils used in HFC134a systems are so

hydroscopic that by the time an inadequate system

performance is detected, oil will be saturated with

moisture.

• CFC12 has much higher tolerance to system

processing materials, such as drawing compounds,

rust inhibitors, and cleaning compounds, than

HFC134a. Such materials are not soluble in HFC134a

systems. If materials were to be washed from system

surfaces by ester oils, they could accumulate and

eventually plug capillary tube.

• Care must be taken to minimize moisture from

entering HFC134a system. Do not leave compressor

or system open to atmosphere for more than 10

minutes. Excessive moisture in HFC134a system will

react with compressor oil and generate acid.

• Compressor must be replaced when performing low

side leak repair.

• Drier filter must always be replaced with service drier

filter, part #B2150504.

Important: Unbrazing drier filter from tubing will drive

moisture from desiccant and into system, causing

acids to form. Do not unbraze filter drier from tubing.

If CFC12 service drier was installed in HFC134A

system, drier could overload due to excessive

moisture.

• HFC134a compatible copper tubing, part

#R0174075 (1/4" O.D. X 18" length) and part

#R0174076 (5/16" O.D. X 24" length) must be used

when replacing tubing.

• Avoid system contamination by using Towerdraw

E610 evaporating oil, part # R0157532, when flaring,

swaging, or cutting refrigeration tubing.

RS1200001 14 November 1996

Service Equipment

Listed below is equipment needed for proper

servicing of HFC134a systems. Verify equipment is

confirmed by manufacturer as being compatible with

HFC134a and ester oil system.

Equipment must be exclusively used for HFC134a.

Exclusive use of equipment only applies to italic

items.

• Evacuation pump

Check with vacuum pump supplier to verify

equipment is compatible for HFC134a. Robinair,

Model 15600, 2 stage, 6 cubic feet per minute pump

is recommended.

• Four-way manifold gauge set, with low loss hoses

• Leak detector

• Charging cylinder

• Line piercing saddle valve

(Schroeder valves). Seals must be HFC134a and

ester oil compatible. Line piercing valves may be used

for diagnosis but are not suitable for evacuation or

charging, due to minute holes pierced in tubing. Do

not leave mechanical access valves on system.

Valves eventually will leak. Molecules of HFC134a are

smaller than other refrigerants and will leak where

other refrigerants would not.

• Swaging tools

• Flaring tools

• Tubing cutter

• Flux

• Sil-Fos

• Silver solder

• Oil for swaging and flaring

Use only part #R0157532

• Copper tubing

Use only part #R0174075 and #R0174076

• Dry nitrogen

99.5% minimum purity, with -40°F or lower dew point

• Crimp tool

• Tube bender

• Micron vacuum gauge

• Process tube adaptor kit

• Heat trap paste

• ICI appliance grade HFC134a

Drier Replacement

Prior to opening refrigeration system, recover

HFC134a refrigerant for safe disposal.

Every time sealed HFC134a system is repaired, drier

filter must be replaced with, part # B2150504.

Cut drier out of system by completing the following

steps. Do not unbraze drier filter. Applying heat to

remove drier will allow moisture into system.

1. Score capillary tube close to drier and break.

2. Reform inlet tube to drier allowing enough space

for large tube cutter.

3. Cut circumference of drier at 1-1/4", below

condenser inlet tube joint to drier.

4. Remove drier.

5. Apply heat trap paste on post condenser tubes to

protect grommets from high heat.

6. Unbraze remaining part of drier. Remove drier

from system.

7. Discard drier in safe place. Do not leave drier with

customer. If refrigerator is under warranty, old

drier must accompany warranty claim.

HFC134a Service Information

DANGER

To avoid death or severe personal injury, cut

drier at correct location. Cutting drier at incorrect

location will allow desiccant beads to scatter.

Completely clean area of beads, if spilled.

November 1996 15 RS1200001

HFC134a Service Information

Replacement Service Compressor

HFC134a service compressors will be charged with

ester oil and pressurized with dry nitrogen. Before

replacement compressor is installed, pull out 1 rubber

plug. A pop from pressure release should be heard. If

a pop sound is not heard, do not use compressor.

Positive pressure in compressor is vital to keep

moisture out of ester oil. Do not leave compressor

open to atmosphere for more than 10 minutes.

Compressor Testing Procedures

• Refer to “Temperature and Relationship Chart” for

operating watts, test points, and temperature

relationship test.

• Temperature testing is accomplished by using 3 lead

thermocouple temperature tester in specific locations.

Test point T-1 is outlet on evaporator coil and T-2 is

inlet. Test point T-3 is suction tube temperature

midway between where armaflex ends and suction

port of compressor (approximately 12 inches from

compressor).

• Thermocouple tips should be attached securely to

specified locations.

• Do not test during initial pull down. Allow one off cycle

or balanced temperature condition to occur before

proceeding with testing.

• Refrigerator must operate minimum of 20 minutes

after thermocouples are installed.

• Turn control to colder to obtain required on time.

• Wattage reading must be recorded in conjunction with

temperature test to confirm proper operation.

• Suction and head pressures are listed on

“Temperature and Relationship Chart” Normally these

are not required for diagnosis but used for

confirmation on systems which have been opened.

Refrigerant Charge

Refrigerant charge in all capillary tube systems is

critical and exact amount is required for proper

performance. Factory charges are shown on serial

plate. Do not use refrigerant other than shown on

serial plate.

Leak Testing

Undetected leaks lead to repeated service calls and

eventually result in system contaminations,

restrictions, and burned out compressors.

After recharging, sealed system must be thoroughly

tested for leaks. If a very small leak is difficult to

isolate, coat area with soap suds and observe

location of bubbles.

To avoid death or severe personal injury, never

use oxygen, air or acetylene for pressure testing

or cleanout of refrigeration system. Use of

oxygen, air, or acetylene may result in violent

explosion. Oxygen may explode on contact with

oil and acetylene will spontaneously explode

when under pressure.

WARNING

Evacuation and Charging

Vacuum Pump

.6 cm Copper

Tubing

Compressor

Process

Tube

Charging Hose

Thermistor

Vacuum Gauge

Low Side Gauge

Valve

High Side Gauge

Charging Hose

Drier/Process Tube

Valve

Charging

Cylinder

RS1200001 16 November 1996

HFC134a Service Information

Before opening system evaporator coil must be at

ambient temperature to minimize moisture infiltration

into system.

1. After capturing refrigerant, replacing drier and

making any repairs, evacuate system from high

side through drier/process tube and low side

through compressor process tube simultaneously.

Evacuation should not be done through line

piercing valve but through I.D. opening of tubes.

2. With valves “C” and “F” closed to thermistor

vacuum gauge and charging cylinder, open all

other valves and start vacuum pump.

3. At approximately 29 inches of vacuum, open valve

“C” to thermistor vacuum gauge and take micron

reading.

4. Continue evacuating system until thermistor

vacuum gauge registers 600 microns.

5. At 600 microns close valve “A” to vacuum pump to

allow micron reading in system to balance. Micron

level will rise. If in 2 minutes, micron level

stabilizes at 1000 microns or below, system is

ready for charging.

• If micron rises above 1000 micron level and

stabilizes, open valve “A” to vacuum pump and

continue evacuating.

• If micron reading rises rapidly and does not

stabilize, a leak still exists in system. Close valve

“A” to vacuum pump and “C” to thermistor vacuum

gauge. Invert charging cylinder and open charging

cylinder valve “F” to add partial charge for leak

checking. With leak detector, check manifold

connections and system for leaks. After locating

leak, capture refrigerant charge, repair leak, and

begin at step 1.

6. Once system is ready to charge, close valve “A”

(vacuum pump), “C” (thermistor vacuum gauge),

and “E” (low side manifold gauge).

7. Check serial plate for correct charge and set scale

on dial-a-charge cylinder for corresponding

HFC134a pressure reading. Do not use captured or

recycled refrigerant in Amana

refrigerators. Use

of captured or recycled refrigerant voids any

warranty.

8. Open valve “F” to charging cylinder and let exact

amount of refrigerant out of cylinder. Close valve.

Low side gauge pressure should rise shortly after

opening charging cylinder valve as system

pressure equalizes through capillary tube. If

pressure does not equalize, a restriction typically

exists at capillary/drier braze joint.

WARNING

To avoid severe personal injury or death from

fire keep system free from contamination due

to presence of air. Follow instructions exactly.

9. If no restriction exists, open valve “E” (low side

manifold gauge) and pinch off high side drier

process tube.

10. Start compressor and draw remaining refrigerant

in charging hoses and manifold into compressor

through compressor process tube. To check high

side pinch-off drier process tube, close valve “D”

(high side gauge). If pinch-off is not leaking, high

side pressure will not rise. If high side pressure

gauge shows an increase, repeat high side pinch-

off and open valve “D”. Repeat until high side

pinch-off no longer leaks.

11. Pinch-off compressor process tube and remove

charging hose. Braze stub closed while

compressor is operating.

12. Unplug refrigerator from electrical outlet.

Remove charging hose and braze high side drier

process tube closed.

November 1996 17 RS1200001

Refrigerant Flow

RS1200001 18 November 1996

Air Flow

November 1996 19 RS1200001

Machine Compartment Assembly

Component Function and Testing

RS1200001 Rev. 1 20 April 1998

Capacitor Run capacitor connects to relay terminal.

Capillary tube

Compressor When compressor electrical circuit is energized, the

start winding current causes PTC relay to heat. After an

amount of starting time the start winding circuit turns

off. PTC relay will switch off the start winding circuit

even though compressor has not started (as when

attempting to restart after momentary power

interruption).

With "open" PTC relay, compressor will not start

because there is little or no current to start windings.

Overload protector will open due to high locked rotor

run winding current.

With "shorted" PTC relay or capacitor, compressor will

start and overload protector will quickly open due to

high current of combined run and start windings.

With open or weak capacitor, the compressor will start

and run as normal but will consume more energy.

Check for resistance between:

Terminals "S" & "C"

Terminals "R"& "C"

Ground Test

Disconnect power to refrigerator .Remove compressor leads and use an

ohmmeter set on highest scale. Touch 1 lead to compressor body (clean

point of contact) and the other probe to each compressor terminal. If a

reading is obtained, compressor is grounded and must be replaced.

1. Disconnect power to refrigerator.

2. Remove capacitor and disconnect capacitor wires.

3. Discharge capacitor by shorting across terminals with a resistor for

1 minute.

4. Check resistance across capacitor terminals with ohmeter set on

"X1K" scale.

• Needle should jump towards 0 ohms and quickly move back to

infinity.

• If needle does not move, the capacitor is open.

• If needle reads a constant value at or near 0 ohms, the capacitor is

shorted.

• If needle jumps towards 0 and then moves back to a constant high

resistance (not infinity), the capacitor has a high resistance leak.

Operation Test

If motor winding tests fail to show cause for failure:

1. Disconnect power to refrigerator. Wire a test cord to disconnect

switch.

2. Place time delayed fuse, with U.L. rating equal to amp rating of motor,

in test cord socket.

3. Remove overload and relay.

4. Connect start, common, and run leads of test cord on appropriate

terminals of compressor.

5. Attach capacitor leads of test cord together. If capacitor is used,

attach capacitor leads to a good capacitor of same capacity.

6. Plug test cord into volt-watt meter to determine start and run wattage

as well as check for low voltage which can also be a source of

trouble.

7. With power to volt-meter, press start cord switch and release. If

compressor motor starts and draws normal wattage compressor is

okay and trouble is in capacitor, relay, overload, freezer temperature

control, adaptive defrost control, or elsewhere.

Capillary is sized in diameter and length to

feed proper amount of refrigerant to

evaporator.

Capillary is soldered to suction line to transfer

heat from capillary and add additional

superheat to gas refrigerant in compressor

suction line.

Capillary discharges into evaporator.

WARNING

To avoid electrical shock which can cause severe personal

injury or death, discharge capacitor through a resistor before

handling.

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Amana Bottom freezer refrigerator User manual

Brand: Amana

Model: Bottom freezer refrigerator

Category: Side-by-side fridge-freezers

Type: User manual

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Amana Bottom freezer refrigerator User manual

Amana Bottom freezer refrigerator User manual

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