Amana AVZC18 Owner's manual

Brand: Amana

Model: AVZC18

Category: Heat pumps

Type: Owner's manual

All information contained herein is subject to change without notice.

5151 San Felipe St., Suite 500, Houston, TX 77056

www.amana-hac.com

MPORTANT

AFETY

NSTRUCTIONS

The following symbols and labels are used throughout this manual

to indicate immediate or potential safety hazards. It is the owner’s

and installer’s responsibility to read and comply with all safety

information and instructions accompanying these symbols. Fail-

ure to heed safety information increases the risk of personal in-

jury, property damage, and/or product damage.

HIGH VOLTAGE !

ISCONNECT

ALL

POWER

BEFORE

SERVICING

ULTIPLE

POWER

SOURCES

MAY

PRESENT

. F

AILURE

MAY

CAUSE

PROPERTY

DAMAGE

PERSONAL

INJURY

DEATH

WARNING

NLY

PERSONNEL

THAT

HAVE

BEEN

TRAINED

INSTALL

ADJUST

SERVICE

REPAIR

(

HEREINAFTER

, “

SERVICE

”)

THE

EQUIPMENT

SPECIFIED

THIS

MANUAL

SHOULD

SERVICE

THE

EQUIPMENT

. T

MANUFACTURER

WILL

NOT

RESPONSIBLE

FOR

ANY

INJURY

PROPERTY

DAMAGE

ARISING

FROM

IMPROPER

SERVICE

PROCEDURES

. I

YOU

SERVICE

THIS

UNIT

YOU

ASSUME

RESPONSIBILITY

FOR

ANY

INJURY

PROPERTY

DAMAGE

WHICH

MAY

RESULT

. I

ADDITION

JURISDICTIONS

THAT

REQUIRE

ONE

LICENSES

SERVICE

THE

EQUIPMENT

SPECIFIED

THIS

MANUAL

ONLY

LICENSED

PERSONNEL

SHOULD

SERVICE

THE

EQUIPMENT

. I

MPROPER

INSTALLATION

ADJUSTMENT

SERVICING

REPAIR

THE

EQUIPMENT

SPECIFIED

THIS

MANUAL

ATTEMPTING

INSTALL

ADJUST

SERVICE

REPAIR

THE

EQUIPMENT

SPECIFIED

THIS

MANUAL

WITHOUT

PROPER

TRAINING

MAY

RESULT

PRODUCT

DAMAGE

PROPERTY

DAMAGE

PERSONAL

INJURY

DEATH

UNIT

HAS

ITS

OWN

UMP

DOWN

MODE

. U

THE

UMP

DOWN

MODE

WHILE

VACUUMING

THE

UNIT

. V

ACUUMING

TOO

LOW

CAN

CAUSE

INTERNAL

ELECTRICAL

ARCING

RESULTING

DAMAGED

FAILED

COMPRESSOR

CAUTION

HIPPING

NSPECTION

Always keep the unit upright; laying the unit on its side or top may

cause equipment damage. Shipping damage, and subsequent in-

vestigation is the responsibility of the carrier. Verify the model

number, specifications, electrical characteristics, and accesso-

ries are correct prior to installation. The distributor or manufac-

turer will not accept claims from dealers for transportation dam-

age or installation of incorrectly shipped units.

IOA-4016B

1/2018

Index

IMPORTANT SAFETY INSTRUCTIONS ......................................................... 1

SHIPPING INSPECTION ....................................................................... 1

CODES & REGULATIONS .................................................................... 2

FEATURES ..................................................................................... 2

INSTALLATION CLEARANCES .................................................................. 2

ROOFTOP INSTALLATIONS .................................................................... 2

SAFE REFRIGERANT HANDLING ............................................................. 3

REFRIGERANT LINES ......................................................................... 3

REFRIGERANT LINE CONNECTIONS .......................................................... 5

LEAK TESTING (NITROGEN OR NITROGEN-TRACED) ...................................... 5

SYSTEM START-UP PROCEDURE ............................................................. 5

ELECTRICAL CONNECTIONS .................................................................. 6

HEAT PUMP ADVANCED FEATURE MENU ................................................22

WIRING DIAGRAM [2-5 TON] ...........................................................25

CAPACITOR ..................................................................................26

TROUBLESHOOTING .........................................................................30

SETTING THE MODE DISPLAY .............................................................35

7-SEGMENT DISPLAY ......................................................................41

START UP CHECKLIST .......................................................................45

HEAT PUMP UNIT

AVZC18 HEAT PUMP

INSTALLATION & SERVICE REFERENCE

ODES

& R

EGULATIONS

This product is designed and manufactured to comply with na-

tional codes. Installation in accordance with such codes and/or

prevailing local codes/regulations is the responsibility of the in-

staller. The manufacturer assumes no responsibility for equip-

ment installed in violation of any codes or regulations. Rated

performance is achieved after 72 hours of operation. Rated per-

formance is delivered at the specified airflow. See outdoor unit

specification sheet for split system models or product specifica-

tion sheet for packaged and light commercial models. Specifica-

tion sheets can be found at www.amana-hac.com for Amana®

brand products. Within the website, please select the residential

or commercial products menu and then select the submenu for

the type of product to be installed, such as air conditioners or

heat pumps, to access a list of product pages that each contain

links to that model’s specification sheet.

The United States Environmental Protection Agency (EPA) has is-

sued various regulations regarding the introduction and disposal

of refrigerants. Failure to follow these regulations may harm the

environment and can lead to the imposition of substantial fines.

Should you have any questions please contact the local office of

the EPA.

If replacing a condensing unit, heat pump or air handler, the sys-

tem must be manufacturer approved and Air Conditioning, Heat-

ing and Refrigeration Institute (AHRI) matched.

NOTE: The installation of an inverter heat pump with unmatched

system units will not allow for proper operation.

NVERTER

H/P

MODELS

CAN

ONLY

MATCHED

WITH

AV**PEC

AIR

HANDLER

. D

AMAGE

RESULTING

FROM

OPERATION

WITH

ANY

OTHER

COMBINATION

NOT

COVERED

OUR

WARRANTIES

NOTICE

Outdoor inverter units are approved for operation above 0°F in

cooling mode and -20°F (RH10%) in heating mode with no addi-

tional kit necessary.

Damage resulting from operation of the unit in a structure that is

not complete (either as part of new construction or renovation) is

not covered by our warranties.

EATURES

This heat pump is part of a system that uses inverter technology to

more efficiently remove or add heat with better efficiency and

achieve the target comfort conditions. System may ONLY be in-

stalled using a ComfortNet™ thermostat with model number CTK04

as part of the digital communicating system. The ComfortNet

system reduces the number of required thermostat wires, pro-

vides additional setup features and enhanced active diagnostics.

Due to components using inverter technology, the heat pump

will not function properly if used with a CTK03, 02 or 01

ComfortNet thermostat.

APPROVED

FOR

USE

WITH

CTK01, CTK02

CTK03.

NOTICE

NSTALLATION

LEARANCES

Special consideration must be given to location of the heat pump

unit(s) in regard to structures, obstructions, other units, and any/

all other factors that may interfere with air circulation. Where

possible, the top of the unit should be completely unobstructed;

however, if vertical conditions require placement beneath an ob-

struction there should be a minimum of 60 inches between the

top of the unit and the obstruction(s). The specified dimensions

meet requirements for air circulation only. Consult all appropri-

ate regulatory codes prior to determining final clearances.

Another important consideration in selecting a location for the

unit(s) is the angle to obstructions. Either side adjacent the valves

can be placed toward the structure provided the side away from

the structure maintains minimum service clearance. Corner in-

stallations are strongly discouraged.

OK!

AA AAA

CCOK!

OK!

NOT

RECOMMENDED

AA AA

B B B

Model Type A B C AA

Residential 10" 10" 18" 20"

Light Commercial 12" 12" 18" 24"

Minimum Airflow Clearance

This unit can be located at ground floor level or on flat roofs. At

ground floor level, the unit must be on a solid, level foundation

that will not shift or settle. To reduce the possibility of sound

transmission, the foundation slab should not be in contact with

or be an integral part of the building foundation. Care should be

taken to ensure the unit is installed away from noise sensitive

locations such as bedrooms, windows and outdoor living areas.

Ensure the foundation is sufficient to support the unit. A concrete

slab raised above ground level provides a suitable base.

OOFTOP

NSTALLATIONS

If it is necessary to install this unit on a roof structure, ensure the

roof structure can support the weight and that proper consider-

ation is given to the weather-tight integrity of the roof. Since the

unit can vibrate during operation, sound vibration transmission

should be considered when installing the unit. Vibration absorb-

ing pads or springs can be installed between the heat pump unit

legs or frame and the roof mounting assembly to reduce noise

vibration.

ELECTRICAL NOISE

The unit should be well grounded so that potential effects of elec-

trical noise from the inverter to surrounding equipment can be

minimized.

When selecting an installation location, keep sufficient distance

from the heat pump unit and wiring to radios, personal comput-

ers, stereos, etc., as shown in the following figure.

Circuit

Breaker

(In.)

Radio, TV

60” or more

To Indoor Unit and Thermostat

60” or more

Placement to Minimize Electronic Noise

AFE

EFRIGERANT

ANDLING

While these items will not cover every conceivable situation, they

should serve as a useful guide.

AVOID

POSSIBLE

EXPLOSION

USE

ONLY

RETURNABLE

(

NOT

DISPOSABLE

)

SERVICE

CYLINDERS

WHEN

REMOVING

REFRIGERANT

FROM

SYSTEM

• E

NSURE

THE

CYLINDER

FREE

DAMAGE

WHICH

COULD

LEAD

LEAK

EXPLOSION

• E

NSURE

THE

HYDROSTATIC

TEST

DATE

DOES

NOT

EXCEED

YEARS

• E

NSURE

THE

PRESSURE

RATING

MEETS

EXCEEDS

400

PSIG

HEN

DOUBT

NOT

USE

CYLINDER

WARNING

EFRIGERANTS

ARE

HEAVIER

THAN

AIR

. T

HEY

CAN

“

PUSH

OUT

”

THE

OXYGEN

YOUR

LUNGS

ANY

ENCLOSED

SPACE

. T

AVOID

POSSIBLE

DIFFICULTY

BREATHING

DEATH

• N

EVER

PURGE

REFRIGERANT

INTO

ENCLOSED

ROOM

SPACE

. B

LAW

ALL

REFRIGERANTS

MUST

RECLAIMED

• I

INDOOR

LEAK

SUSPECTED

THOROUGHLY

VENTILATE

THE

AREA

BEFORE

BEGINNING

WORK

• L

IQUID

REFRIGERANT

CAN

VERY

COLD

. T

AVOID

POSSIBLE

FROSTBITE

BLINDNESS

AVOID

CONTACT

AND

WEAR

GLOVES

AND

GOGGLES

. I

LIQUID

REFRIGERANT

DOES

CONTACT

YOUR

SKIN

EYES

SEEK

MEDICAL

HELP

IMMEDIATELY

• A

LWAYS

EPA

REGULATIONS

. N

EVER

BURN

REFRIGERANT

OISONOUS

GAS

WILL

PRODUCED

WARNING

AVOID

POSSIBLE

INJURY

EXPLOSION

DEATH

PRACTICE

SAFE

HANDLING

REFRIGERANTS

WARNING

AVOID

POSSIBLE

EXPLOSION

•N

EVER

APPLY

FLAME

STEAM

REFRIGERANT

CYLINDER

. I

YOU

MUST

HEAT

CYLINDER

FOR

FASTER

CHARGING

PARTIALLY

IMMERSE

WARM

WATER

•N

EVER

FILL

CYLINDER

THAN

80%

FULL

LIQUID

REFRIGERANT

•N

EVER

ADD

ANYTHING

OTHER

THAN

R-410A

RETURNABLE

R-410A

CYLINDER

. T

SERVICE

EQUIPMENT

USED

MUST

LISTED

CERTIFIED

FOR

THE

TYPE

REFRIGERANT

USE

•S

TORE

CYLINDERS

COOL

DRY

PLACE

. N

EVER

USE

CYLINDER

PLATFORM

ROLLER

WARNING

EFRIGERANT

INES

COMPRESSOR

PVE

OIL

FOR

R-410A

UNITS

EXTREMELY

SUSCEPTIBLE

MOISTURE

ABSORPTION

AND

COULD

CAUSE

COMPRESSOR

FAILURE

. D

NOT

LEAVE

SYSTEM

OPEN

ATMOSPHERE

ANY

LONGER

THAN

NECESSARY

FOR

INSTALLATION

CAUTION

Use only refrigerant grade (dehydrated and sealed) copper tubing

to connect the heat pump unit with the indoor unit. After cutting

the tubing, install plugs to keep refrigerant tubing clean and dry

prior to and during installation. Tubing should always be cut

square keeping ends round and free from burrs. Clean the tubing

to prevent contamination. The liquid line must be insulated if

more than 50 ft. of liquid line will pass through an area that may

reach temperatures of 30 °F or higher than ambient in cooling

mode and/or if the temperature inside the conditioned space may

reach a temperature lower than ambient in heating mode. Never

attach a liquid line to any uninsulated potion of the gas line.

Do NOT let refrigerant lines come in direct contact with plumbing,

ductwork, floor joists, wall studs, floors, and walls. When run-

ning refrigerant lines through a foundation or wall, openings

should allow for sound and vibration absorbing material to be

placed or installed between tubing and foundation. Any gap be-

tween foundation or wall and refrigerant lines should be filled

with a pliable silicon-based caulk, RTV or a vibration damping

material. Avoid suspending refrigerant tubing from joists and studs

with rigid wire or straps that would come in contact with the

tubing. Use an insulated or suspension type hanger. Keep both

lines separate and always insulate the gas line.

Insulation is necessary to prevent condensation from forming

and dropping from the gas line. Armflex or satisfactory equiva-

lent with 3/8” min. wall thickness is recommended. In severe

conditions (hot, high humidity areas) 1/2” insulation may be re-

quired. Insulation must be installed in a manner which protects

tubing and connections from damage and contamination.

Where possible, drain as much residual compressor oil from

existing systems, lines, and traps; pay close attention to low ar-

eas where oil may collect. NOTE: If changing refrigerant, the

indoor coil and metering device must be replaced. Only AV**PEC

air handlers are compatible and have been manufacturer ap-

proved for use with these models. See unit specifications or AHRI

for an approved system match.

Line Set Length

(Tons) Suct Liq

23/43/8

37/83/8

41 1/83/8

51 1/83/8

RECOMMENDED

INTERCONNECTING TUBING (Ft)

0 - 125' Equivalent

Heat Pump

Unit Line Type

& Line Diameter (In. OD)

Heat Pump BELOW Indoor Coil

Maximum line set

equivalent length of 125 ft*.

The maximum line set actual length is 100 ft.

*Includes pressure losses of any elbow, bends, etc.

Heat Pump ABOVE Indoor Coil

Maximum vertical

separation of 100 ft.

*Includes pressure losses of any elbow, bends, etc.

Maximum line set

equivalent length of 125 ft.*

The maximum line set

actual length is 100 ft.

Oil Trap Construction

LONG RADIUS

STREET ELL

SHORT RADIUS

STREET ELL

STREET

ELL

EFRIGERANT

INE

ONNECTIONS

IMPORTANT

To avoid overheating the service valve, EEV, or filter

drier while brazing, wrap the component with a wet rag,

or use a thermal heat trap compound. Be sure to follow

the manufacturer’s instruction when using the heat trap

compound. Note: Remove Schrader valves from

service valves before brazing tubes to the valves. Use a

brazing alloy of 2% minimum silver content. Do not use

flux.

Torch heat required to braze tubes of various sizes is

proportional to the size of the tube. Tubes of smaller size

require less heat to bring the tube to brazing

temperature before adding brazing alloy. Applying too

much heat to any tube can melt the tube. Service

personnel must use the appropriate heat level for the

size of the tube being brazed.

NOTE: The use of a heat shield when brazing is recommended

to avoid burning the serial plate or the finish on the unit.

1. The ends of the refrigerant lines must be cut square,

deburred, cleaned, and be round and free from nicks or

dents. Any other condition increases the chance of a

refrigerant leak.

2. “Sweep” the refrigerant line with nitrogen or inert gas

during brazing to prevent the formation of copper-oxide

inside the refrigerant lines. The PVE oils used in R-410A

applications will clean any copper-oxide present from the

inside of the refrigerant lines and spread it throughout the

system. This may cause a blockage or failure of the metering

device.

3. After brazing, quench the joints with water or a wet cloth to

prevent overheating of the service valve.

4. A bi-flow filter drier is shipped with the unit as a separate

component and must be brazed on by the installer on-site.

Ensure the bi-flow filter drier paint finish is intact after

brazing. If the paint of the steel filter drier has been burned

or chipped, repaint or treat with a rust preventative.

The recommended location of the filter drier is before the

expansion device at the indoor unit.

NOTE: Be careful not to kink or dent refrigerant lines. Kinked or

dented lines will cause poor performance or compressor damage.

Do NOT make final refrigerant line connection until plugs are

removed from refrigerant tubing.

EAK

ESTING

ITROGEN

-T

RACED

)

AVOID

THE

RISK

FIRE

EXPLOSION

NEVER

USE

OXYGEN

HIGH

PRESSURE

AIR

FLAMMABLE

GASES

FOR

LEAK

TESTING

REFRIGERATION

SYSTEM

WARNING

AVOID

POSSIBLE

EXPLOSION

THE

LINE

FROM

THE

NITROGEN

CYLINDER

MUST

INCLUDE

PRESSURE

REGULATOR

AND

PRESSURE

RELIEF

VALVE

. T

PRESSURE

RELIEF

VALVE

MUST

SET

OPEN

THAN

150

PSIG

WARNING

To locate leaks, pressure test the system using dry nitrogen or leak

detector fluid per the manufacturer’s recommendation. If you

wish to use a leak detector, charge the system to 10 psi using the

appropriate refrigerant then use nitrogen to finish charging the

system to working pressure then apply the detector to suspect

areas. If leaks are found, repair them. After repair, repeat the

pressure test. If no leaks exist, proceed to System Start-up Proce-

dure.

YSTEM

TART

ROCEDURE

GENERAL NOTES:

Adequate refrigerant charge for the matching indoor coil and 15

feet of line set is supplied with the heat pump unit. If liquid line

set exceeds 15 feet in length, refrigerant should be added at 0.6

ounces per foot of liquid line.

IOLATION

EPA

REGULATIONS

MAY

RESULT

FINES

OTHER

PENALTIES

NOTICE

UNITS

SHOULD

HAVE

HIGH

VOLTAGE

POWER

SUPPLY

CONNECTED

HOURS

PRIOR

STARTUP

NOTICE

REFRIGERANT UNDER PRESSURE!

• D

NOT

OVERCHARGE

SYSTEM

WITH

REFRIGERANT

• D

NOT

OPERATE

UNIT

VACUUM

NEGATIVE

PRESSURE

AILURE

PROPER

PROCEDURES

MAY

CAUSE

PROPERTY

DAMAGE

PERSONAL

INJURY

DEATH

WARNING

PERATING

THE

COMPRESSOR

WITH

THE

GAS

VALVE

CLOSED

WILL

CAUSE

SERIOUS

COMPRESSOR

DAMAGE

SUCH

DAMAGE

NOT

COVERED

OUR

WARRANTIES

CAUTION

REFRIGERANT

CERTIFIED

AHRI

STANDARDS

. U

SED

REFRIGERANT

MAY

CAUSE

COMPRESSOR

DAMAGE

AND

THE

WARRANTY

. M

OST

PORTABLE

MACHINES

CANNOT

CLEAN

USED

REFRIGERANT

MEET

AHRI

STANDARDS

NOT

COVERED

UNDER

CAUTION

START-UP PROCEDURE DETAIL

Liquid and gas valves on heat pump unit are closed to contain the

charge within the unit. The unit is shipped with the valve stems

closed and caps installed. Do not open valves until the indoor coil

and line set is evacuated.

ROLONGED

OPERATION

SUCTION

PRESSURES

LESS

THAN

PSIG

FOR

THAN

SECONDS

WILL

RESULT

OVERHEATING

THE

COMPRESSOR

AND

MAY

CAUSE

PERMANENT

DAMAGE

CAUTION

1. Connect the vacuum pump with 250 micron capability to

the service valves.

2. Evacuate the system to 250 microns or less using gas and

liquid service valves. Using both valves is necessary as

some compressors create a mechanical seal separating

the sides of the system.

3. Close pump valve and hold vacuum for 10 minutes.

Typically pressure will rise during this period.

• If the pressure rises to 1000 microns or less and remains

steady the system is considered leak-free; proceed to

start-up.

• If pressure rises above 1000 microns but holds steady

below 2000 microns, moisture and/or noncondensibles

may be present or the system may have a small leak.

Return to step 2: If the same result is encountered check

for leaks as previously indicated and repair as necessary

then repeat evacuation.

• If pressure rises above 2000 microns, a leak is present.

Check for leaks as previously indicated and repair as

necessary then repeat evacuation.

5000

4500

4000

3500

3000

2500

2000

1500

1000

500

0 1 2 3 4 5 6 7 8 9 10

LEAK(S)

PRESENT

MINUTES

VACUUM IN MICRONS

CONDENSIBLES OR SMALL

LEAK PRESENT

NO LEAKS

NO CONDENSIBLES

LECTRICAL

ONNECTIONS

HIGH VOLTAGE!

ISCONNECT

ALL

POWER

BEFORE

SERVICING

ULTIPLE

POWER

SOURCES

MAY

PRESENT

. F

AILURE

MAY

CAUSE

PROPERTY

DAMAGE

PERSONAL

INJURY

DEATH

DUE

ELECTRIC

SHOCK

. W

IRING

MUST

CONFORM

WITH

NEC

CEC

AND

ALL

LOCAL

CODES

. U

NDERSIZED

WIRES

COULD

CAUSE

POOR

EQUIPMENT

PERFORMANCE

EQUIPMENT

DAMAGE

FIRE

WARNING

AVOID

THE

RISK

FIRE

EQUIPMENT

DAMAGE

USE

COPPER

CONDUCTORS

WARNING

GROUNDING REQUIRED!

LWAYS

INSPECT

AND

USE

PROPER

SERVICE

TOOLS

. L

ACK

INSPECTION

IMPROPER

TOOLS

MAY

CAUSE

EQUIPMENT

DAMAGE

PERSONAL

INJURY

. A

DISCONNECTED

GROUNDING

DEVICES

MUST

RECONNECTED

BEFORE

INSTALLING

SERVICING

. M

ULTIPLE

COMPONENTS

THIS

UNIT

MAY

CONDUCT

ELECTRICAL

CURRENT

;

THESE

ARE

GROUNDED

. I

SERVICING

THE

UNIT

ANY

DISCONNECTION

GROUNDING

WIRES

SCREWS

STRAPS

CLIPS

NUTS

WASHERS

USED

COMPLETE

THE

GROUND

MUST

RETURNED

THEIR

ORIGINAL

POSITION

AND

PROPERLY

FASTENED

CAUTION

The heat pump unit rating plate lists pertinent electrical data

necessary for proper electrical service and overcurrent protec-

tion. Wires should be sized to limit voltage drop to 2% (max.)

from the main breaker or fuse panel to the condensing unit. Con-

sult the NEC, CEC, and all local codes to determine the correct wire

gauge and length.

Local codes often require a disconnect switch located near the

unit; do not install the switch on the unit. Refer to the installation

instructions supplied with the indoor air handler for specific wir-

ing connections and indoor unit configuration.

OVERCURRENT P ROTECTION

The inverter control system software provides sufficient time de-

lay to protect from overcurrent conditions and permit the com-

pressor to adjust their rotational speed.

HIGH V OLTAGE CONNECTIONS

Route power supply and ground wires through the high voltage

port and terminate in accordance with the wiring diagram pro-

vided inside the control panel cover.

LOW V OLTAGE C ONNECTIONS

The unit is designed to work as part of a fully communicating

HVAC system, utilizing a ComfortNet™ CTK04 thermostat,

ComfortNet compatible indoor unit, and up to four wires. Route

control wires through the low voltage port and terminate in ac-

cordance with the wiring diagram provided inside the control

panel cover.

Voltage Ports

Connect low voltage communication wires (1, 2) to low voltage

pigtail provided.

THERMOSTAT WIRING

NOTE: A removable plug connector is provided with the control

to make thermostat wire connections. This plug may be removed,

wire connections made to the plug, and replaced. It is STRONGLY

recommended that you do not connect multiple wires into a single

terminal. Wire nuts are recommended to ensure one wire is used

for each terminal. Failure to do so may result in intermittent

operation.

Typical 18 AWG thermostat wire may be used to wire the system

components. However, communications reliability may be im-

proved by using a high quality, shielded, twisted pair cable for

the data transmission lines. In either case, 250 feet is the maxi-

mum length of wire between indoor unit and outdoor unit, or

between indoor unit and thermostat.

LOW

VOLTAGE

HIGH

VOLTAGE

TWO-WIRE OUTDOOR, FOUR-WIRE INDOOR WIRING

Low voltage wiring consists of two wires between the indoor unit

and outdoor unit and four wires between the indoor unit and

thermostat. The required wires are data lines 1 and 2, “R” (24 VAC

hot) and “C” (24 VAC common).

12RC

CTK04

Thermostat

Compatible

Air Handler

Integrated Control Module

Compatible AC/HP

Integrated Control Module

12RC

System Wiring

STEP 1. CALCULATE REFRIGERANT CHARGE BASED ON LINE SET LENGTH

The heat pump unit is shipped with a predetermined factory charge

level as shown below. For longer line sets greater than 15 feet,

add 0.6 ounces of refrigerant per foot. Refer to the following page

for the equivalent length of the elbow fittings.

NOTICE

OTAL

EFRIGERANT

ACTORY

HARGE

+ (0.6

. * A

DDITIONAL

EET

CTUAL

INE

The following table shows refrigerant amounts for every 5 feet of

line.

15 (Factory Charge) 139 139 160 237

20 142 142 163 240

25 145 145 166 243

30 148 148 169 246

35 151 151 172 249

40 154 154 175 252

45 157 157 178 255

50 160 160 181 258

55 163 163 184 261

60 166 166 187 264

65 169 169 190 267

70 172 172 193 270

75 175 175 196 273

80 178 178 199 276

85 181 181 202 279

90 184 184 205 282

95 187 187 208 285

100 190 190 211 288

Unit Tonnage

Actual Line Set

Length (ft.) 2-Ton 3-Ton 4-Ton 5-Ton

Total Refrigerant (Oz.)

STEP 2. CONNECT HEAT PUMP UNIT TO SYSTEM

OPEN THE LIQUID VALVE FIRST! I

THE

GAS

SERVICE

VALVE

OPENED

FIRST

OIL

FROM

THE

COMPRESSOR

MAY

DRAWN

INTO

THE

INDOOR

COIL

EEV,

RESTRICTING

REFRIGERANT

FLOW

AND

AFFECTING

OPERATION

THE

SYSTEM

POSSIBLE REFRIGERANT LEAK!

AVOID

POSSIBLE

REFRIGERANT

LEAK

OPEN

THE

SERVICE

VALVES

UNTIL

THE

TOP

THE

STEM

1/8”

FROM

THE

RETAINER

CAUTION

NSURE

VALVES

ARE

OPEN

AND

ADDITIONAL

CHARGE

ADDED

PER

CHART

BEFORE

APPLYING

POWER

CAUTION

When opening valves with retainers, open each valve only until

the top of the stem is 1/8” from the retainer. To avoid loss of

refrigerant, DO NOT apply pressure to the retainer. When open-

ing valves without a retainer, remove service valve cap and in-

sert a hex wrench into the valve stem and back out the stem by

turning the hex wrench counterclockwise. Open the valve until it

contacts the rolled lip of the valve body.

After the refrigerant charge has bled into the system, open the

liquid service valve. The service valve cap is the secondary seal

for the valves and must be properly tightened to prevent leaks.

Make sure cap is clean and apply refrigerant oil to threads and

sealing surface on inside of cap. Tighten cap finger-tight and then

tighten additional 1/6 of a turn to properly seat the sealing sur-

faces.

Do not introduce liquid refrigerant from the cylinder into the

crankcase of the compressor as this may damage the compressor.

Break vacuum by fully opening liquid and gas base valve.

NOTE: Units may utilize ball valves or front seating valves or front

seating valves. It is not necessary to force the stem tightly against

the rolled lip.

NOTE: The following table lists the equivalent length gained from

adding bends to the suction line. Properly size the suction line to

minimize capacity loss.

3/4 7/8 1 1/8

90° Short Radius 1.7 2 2.3

90° Long Radius 1.5 1.7 1.6

45° 0.7 0.8 1

Type of Elbow

Fitting Inside Diameter (inches)

ATTENTION INSTALLER - IMPORTANT NOTICE!

Please read carefully before installing this unit.

• For AVZC18, do not install the 24 Volt Transformer that is included with the CTK04 Thermostat in the Heat Pump

Unit; it is not needed.

• Do not attach any wires to the R & C Terminals on the Heat Pump Unit, as they are not needed for inverter unit

setup.

• Data line terminals #1 and #2 are polarity sensitive. Only the data lines, 1 and 2, are required between the indoor

and outdoor units.

• Data line terminal #1 from outdoor unit must connect to terminal #1 on indoor unit and thermostat and data line

terminal #2 from outdoor unit must connect to terminal #2 on indoor unit and thermostat. Verify wires are not

reversed.

• It is strongly recommended to use wire nuts at the indoor unit when connecting multiple data lines or low voltage

wires together. It is not recommended to use the terminal block to connect two or more wires.

• Calculate the Liquid Line Set length and weigh in 0.6 ounces per foot of R410A refrigerant for any length over 15

feet.

• Charge by Sub-cooling.

Sub-cooling should be within the range as shown on the chart.

After adjusting charge, please allow at least 20 minutes for the

system to stabilize before making further charge adjustment.

2 T 11±1

°F

3 T 14±1

°F

4 T 9±1

°F

5 T 12±1

°F

Setting

1ON

2ON

1OFF

2OFF

*OD DS2 switch 1 and 2 both must be turned on during normal operation mode

CT Communication Enabled

Cooling Emergency Mode for Future Use*

OD DS1

OD DS2

Switch #

Dipswitch Default Factory Settings

Purpose

CT Communication Enabled

STEP 3. SYSTEM START-UP TEST

INITIAL

POWER

START

THE

OUTDOOR

UNIT

WILL

DISPLAY

CODE

E11,

SIGNALING

THAT

INITIAL

SYSTEM

TEST

MUST

RUN

. F

OLLOW

THE

OMFORT

™

SETUP

SCREEN

ENTER

APPLICATION

UNIQUE

INFORMATION

. S

OMFORT

THERMOSTAT

MANUAL

FOR

DETAILED

INFORMATION

NOTICE

A system test is now required to check the equipment settings

and functionality. Once selected, it checks the equipment for

approximately 5 - 15 minutes. System test may exceed 15 min-

utes if there is an error. Refer to the Troubleshooting section, if

error code appears.

Before starting the SYSTEM TEST, turn off the electric heater.

1. Ensure the thermostat is installed.

2. Apply power to outdoor and indoor units.

3. Start-up.

After the application information is entered,

the initial system test must be run.

INVERTER

H/P

SYSTEM

USING

OMFORT

NOT

INSTALL

TRANSFORMER

NOTICE

The HOME screen will be displayed showing

information similar to one of the adjacent screens.

Select MENU. Make sure the thermostat is in OFF mode

and select SYSTEM menu. Choose OFF before SYSTEM

VERIFICATION test.

NOTE: Either screen may be displayed.

SYSTEM TEST must be run for all installations.

System will not operate without a completed initial

SYSTEM TEST.

NOTE: The thermostat screen may indicate to run the

SYSTEM VERIFIATION test.

4. From the MENU screen, scroll down and select

COMFORTNET™ USER MENU.

5. Enter Installer password. (The password is the Date

Code located on the thermostat and is available by

entering the EQUIPMENT STATUS menu and

scrolling to the bottom.)

6. Select YES to continue.

7. From the ComfortNet USER MENU,

select HEAT PUMP.

8. Next, scroll down and select EQUIP TEST.

9. Select SYSTEM TEST.

10. Select ON to run the SYSTEM TEST.

Press DONE to initiate test.

11. Allow the system test to run for its duration

(5-15 minutes). EQUIP TEST SCREEN will

show the system test is ON once selected.

System test will operate the outdoor unit and the

indoor unit through a series of startup tests.

Please proceed to the next step and allow for

startup tests to complete. Do not interrupt power

to outdoor unit, indoor unit, or thermostat

during system test.

12. Press Previous Menu button and navigate to

HOME screen and allow test to finish. The display

similar to the one at the right will be displayed

after SYSTEM TEST completes. Test is complete

only when CODE 11 notice clears from BOTH the

thermostat display AND the seven segment LED

display on the outdoor unit. Please wait for test to

complete and for both codes to clear.

STEP 4. SET THERMOSTAT TO CHARGE MODE

Please follow the following sequence to enter CHARGE MODE.

CHARGE MODE allows for charging of the system. System

operates for a duration of approximately one hour while the

equipment runs at full capacity. After one hour, the CHARGE

MODE ends and the system resumes normal thermostat op-

eration.

Before starting the CHARGE MODE, turn off the electric heater.

1. On the HOME screen, select MENU.

NOTE: Ensure the thermostat is in OFF mode. Select

SYSTEM menu. Choose OFF before CHARGE MODE.

2. From the MENU screen, select

COMFORTNET™ USER MENU.

off

3. Enter Installer password. (The password

is the Date Code located on the thermostat

and is available by entering the

EQUIPMENT STATUS menu and

scrolling to the bottom).

4. Select YES to continue.

5. Select HEAT PUMP.

6. Select MAINTENANCE.

COOL SET-UP

7. Select CHARGE MODE.

8. Select ON. Press DONE to initiate CHARGE MODE. (System

will then run for 1 hour and either return to cooling or

heating mode depending if the thermostat is set to COOL or

HEAT MODE from the SYSTEM menu on the main screen.

If charging is not complete after 1 hour, repeat

7. and 8.

Refer to STEP 5 and STEP 6 for refrigerant charge

level adjustment.

9. To terminate CHARGE MODE, select CHARGE

MODE screen again. Press OFF. Press DONE to

terminate CHARGE MODE.

10. Once CHARGE MODE is complete and has been

terminated, navigate to HOME screen. Enter

normal operation with temperature offset or thermostat

schedule, as desired.

STEP 5. ADJUST REFRIGERANT LEVEL

Using service equipment, add or recover refrigerant according to

the calculation in Step 1. Allow system to stabilize for 20 minutes

after adjusting charge level.

STEP 6. MEASURE SUBCOOLING TO VERIFY PROPER CHARGE

NOTE: Charging equipment must use dedicated PVE oil gauges

and hoses.

1. Purge gauge lines.

2. Connect service gauge manifold to base valve service ports.

3. Convert the liquid pressure to temperature using a

temperature/pressure chart.

4. Temporarily install a thermometer on the liquid line at the

liquid line service valve.

a. Ensure the thermometer makes adequate contact

and is insulated for best possible readings.

5. Subtract the liquid line temperature from the converted

liquid pressure to determine subcooling.

6. Before starting the Subcooling adjustment, make sure the

outdoor ambient temperature is in a below range and the

unit is operating at 100% capacity.

SUBCOOLING = (SAT. LIQUID TEMP.) - (LIQUID LINE TEMP.)

OD Ambient Temp

(degF) < 65 °F 65°F to 105°F > 105 °F

Subcooling

(degF) Weigh in

Charge

2 T - 11 ±1°F

3 T - 14 ±1°F

4 T - 9 ±1°F

5 T - 12 ±1°F

Weigh in

Charge

Charging Table

Note: Subcooling information is valid only while the unit is operating

at 100% capacity or 100% of compressor speed in CHARGE MODE.

Compressor speed is displayed under STATUS menu in the thermostat.

7. If the system subcooling is not within the range as shown in

the following table, adjust subcooling according to the

following procedure.

a. If subcooling is low, add charge to adjust the subcooling

as specified in the following table.

b. If subcooling is high, remove charge to lower the

subcooling to:

2 T 11±1

°F

3 T 14±1

°F

4 T 9±1

°F

5 T 12±1

°F

NOTE: Not more than 8 oz. or 1/2 lb. of refrigerant be added to the

system at a time to achieve the target subcooling. It is recom-

mended adding 4 oz. refrigerant each time, then wait 20 minutes

to stabilize the system.

HECK

THE

CHRADER

PORTS

FOR

LEAKS

AND

TIGHTEN

VALVE

CORES

NECESSARY

. I

NSTALL

CAPS

FINGER

TIGHT

NOTICE

NOT

ADJUST

THE

CHARGE

BASED

SUCTION

PRESSURE

UNLESS

THERE

GROSS

UNDERCHARGE

NOTICE

SUCTION

PRESSURE LIQUID

PRESSURE

PSIG PSIG

50 1 200 70

52 3 210 73

54 4 220 76

56 6 225 78

58 7 235 80

60 8 245 83

62 10 255 85

64 11 265 88

66 13 275 90

68 14 285 92

70 15 295 95

72 16 305 97

74 17 325 101

76 19 355 108

78 20 375 112

80 21 405 118

85 24 415 119

90 26 425 121

95 29 435 123

100 31 445 125

110 36 475 130

120 41 500 134

130 45 525 138

140 49 550 142

150 53 575 145

160 56 600 149

170 60 625 152

SATURATED

SUCTION PRESSURE

TEMPERATURE CHART

R-410A

°F

SATURATED

LIQUID PRESSURE

TEMPERATURE CHART

R-410A

°F

HEAT PUMP WITH OUTDOOR TEMPERATURE LOCKOUTS

It is recommended to set the outdoor temperature lockouts during

the initial thermostat set up. Compressor lockout temperature

will enable the compressor to be turned off and switch heating

source from refrigeration to auxiliary/secondary heating under

low outdoor ambient conditions.

Backup heat lockout temperature will enable auxiliary/second-

ary heating to be turned on when outdoor temperature is much

higher than indoor temperature, compressor might stop operat-

ing under this circumstance.

Backup Heat Lockout

Temperature Compressor Lockout

Temperature

(-) (F°)

OFF 15

In order to access temperature, the compressor lockout and the

backup heat lockout, press MENU and scroll down to press IN-

STALLER OPTIONS. Enter the date code (password) when prompted.

Choose VIEW / EDIT CURRENT SETUP and COMPRESSOR LOCKOUT /

BALANCE POINT will be under HEAT / COOL CONTROL OPTIONS.

For more information please refer to COMFORTNET™ CTK04 Com-

municating Thermostat SYSTEM INSTALLATION GUIDE.

FIELD SELECTABLE BOOST MODE

BOOST MODE enables the system to operate at increased com-

pressor speed to satisfy unusual high loads. BOOST MODE is ini-

tiated by an outdoor temperature sensor located in the outdoor

unit. Please note that outdoor equipment operational sound lev-

els may increase while the equipment is running in BOOST MODE.

Disabling BOOST MODE will provide the quietest and most effi-

cient operation.

NOTE: BOOST MODE performance is most effective when paired

with an electronic expansion valve enabled indoor unit.

NOTE: BOOST MODE is ON by default and is activated when the

outdoor temperature reaches 105°F. BOOST MODE can be dis-

abled and enabled and the activation temperature adjusted in

BOOST TEMP menu using the following procedure:

1. On the HOME screen, select MENU.

2. From the MENU screen, select COMFORTNET™ USER MENU.

3. Enter Installer password if known.

a. The password is the thermostat date code and can

be obtained by selecting the red Cancel button and

selecting the Dealer Information button.

b. Once recorded, click the green OK button and return

to the previous step.

4. Select YES to continue.

5. Select HEAT PUMP.

6. Select SYS SETUP.

COOL SET-UP

7. BOOST MD turns BOOST MODE OFF or ON. BOOST

MODE is ON by default.

8. BOOST TEMP adjusts the activation temperature

from 70° to 105°. “Always ON” option is also

available to permanently engage BOOST MODE.

Factory default is 105°.

...Heat Pump > SYS SETUP > BOOST MD

...Heat Pump > SYS SETUP > BOOST TEMP

105°F

9. Once satisfied with BOOST MODE adjustments, navi-

gate to the HOME screen by selecting the Previous Menu

button three times then selecting HOME.

DEHUMIDIFICATION

The thermostat reads the indoor humidity level from the CTK04

and allows the user to set a dehumidification target based on

these settings. The thermostat controls the humidity level of the

conditioned space using the cooling system. Dehumidification is

engaged whenever a cooling demand is present and structural

humidity levels are above the target level. When this condition

exists the circulating fan output is reduced, increasing system

run time, over cooling the evaporator coil and ultimately remov-

ing more humidity from the structure than if only in cooling mode.

The CTK04 also allows for an additional overcooling limit setting

from 0 °F to 3 °F setup through the Installer Option menu (direc-

tion below). This allows the cooling system to further reduce hu-

midity by lowering the temperature up to 3° F below the cooling

setpoint in an attempt to better achieve desired humidity levels.

By default dehumidification needs to be turned ON at the thermo-

stat via the Dehumidification Equipment menu. Dehumidification

can be activated at the original equipment setup by selecting the

A/C with Low Speed Fan button in the Dehumidification Menu.

Availability can be verified by pressing MENU on the home screen.

Scroll down and if a Dehumidification button is present dehu-

midification is activated.

If Dehumidification is not available in the menu then it must be

enabled through the Installer Options menu. Use the following

procedure to enable and disable dehumidification:

1. On the CTK04 HOME screen, select MENU.

2. From the MENU screen, scroll down and select Installer

Options.

3. Enter installer password if known.

a. The password is the thermostat date code and can

be obtained by selecting the red Cancel button and

selecting the Dealer Information button.

b. Once recorded click the green OK button and return

to the previous step.

4. Select YES to continue.

5. Select View / Edit Current Setup.

6. Scroll down and select Dehumidification.

7. Once open select Dehumidification Equipment: None.

8. From the Dehumidification Menu select A/C with Low

Speed Fan and click the green Done button.

9. Additional Dehumidification operational options can be

selected in the resulting window.

10. Once satisfied with the selection navigate to the HOME

screen by selecting the Done button and selecting Yes to

verify the changes.

11. Select Previous Menu, then the HOME to return to the main

menu.

DEHUMIDIFICATION TIPS

For effective dehumidification operation:

• Ensure “Dehum” is ON through the Installer Options menu

and/or in the ComfortNet User Menu (COOL SETUP).

- If ON, the Dehumidification menu should be visible in

the main menu.

• Verify the cooling airflow profile is set to “Profile D”.

- See the Cool Set-up section of the Installation Manual

for com comlete airflow profile details.

- By default “Dehum” is ON and the cooling airflow

profile is set to “Profile D”.

• For additional dehumidification control, airflow settings

are field adjustable and can be fine-tuned to a value that

is comfortable for the application from a range of +15% to

-15%.

- See the Heat Pump Advanced Feature Menu

section of the Installation Manual for more detail.

COMFORTNET™ SYSTEM

OVERVIEW

A ComfortNet inverter heating and air conditioning system uses

an indoor unit, outdoor unit and thermostat which digitally com-

municate with one another via a two-way communications path.

The thermostat sends commands to the indoor and outdoor units.

The thermostat may request and receive information from both

the indoor and outdoor units. This information may be displayed

on the CTK04 thermostat. The indoor and outdoor units also inter-

act with one another. The outdoor unit may send commands to or

request information from the indoor unit. This two-way digital

communications between the thermostat and subsystems (indoor/

outdoor unit) and between subsystems is the key to unlocking the

benefits and features of the ComfortNet system.

Two-way digital communications is accomplished using only two

wires. The thermostat needs 24 VAC for power. 4 wires between the

indoor unit and thermostat plus two wires between the indoor

unit and outdoor unit are all that are required to operate the

system.

COMFORTNET SYSTEM A DVANCED FEATURES

The ComfortNet™ system permits access to additional system in-

formation, advanced set-up features, and advanced diagnostic/

troubleshooting features. These advanced features are organized

into a menu structure. See the HEAT PUMP ADVANCED FEATURES

MENU section for the menu layout.

DIRECTIONS TO HEAT PUMP ADVANCED FEATURE MENUS

Press MENU, scroll down and press COMFORTNET USER MENU.

Enter the date code (password) when prompted. The date code is

printed on the back of the thermostat; or press MENU > EQUIP-

MENT STATUS and scroll down to find the date code. After you

enter the password, select COMFORTNET USER MENU, answer YES

to the following menu and select HEAT PUMP to view the system

menus.

DIAGNOSTICS

The heat pump’s diagnostics menu provides access to the most

recent faults. The six most recent faults are displayed on the first

screen. Faults are stored in order from most recent to least re-

cent. Any consecutively repeated fault is stored a maximum of

three times. Example: A leak in the system, low refrigerant charge

or an incompletely open stop valve can cause the unit to flash

error code E15. This error code suggests that the unit is experienc-

ing operation at low pressure. The control will only store this

fault the first three consecutive times the fault occurs.

NOTE: It is highly recommended that the fault list be cleared after

performing maintenance or servicing the system.

STATUS

This menu displays information about the systems current status.

This menu can be utilized to confirm correct functionality of the

equipment and for troubleshooting purposes. The following items

will be displayed:

TS Time S t amp

MD Mode

CRM Compressor Reduction Mode

RAD Requested and Actual % Demand

RAF Requested and Reported ID CFM

ATOF Outdoor Air Temperature

and Outdoor Fan STATUS

DCT Discharge Temperature

and Outdoor Coil Temperature

DLT Defrost Sensor

and Outdoor Liquid Temperature

PSDST Pressure Sensor and

Outdoor Suction Temperature

Time Stamp: Provides compressor run time in hours.

Mode: Current system operational mode (COOLING, HEATING,

COOLING STARTUP, HEATING STARTUP, OIL RETURN, DEFROST, STOP).

Compressor Reduction Mode: The compressor is running at a

speed lower than what is requested, based on the cooling load.

Requested and Actual % Demand: Compares the requested cool-

ing demand to what the equipment is providing. For steady state

operation, these number should match.

Requested and Reported ID CFM: Compares the requested indoor

airflow to what the indoor equipment has reported.

Outdoor Air Temperature and Outdoor Fan TAP: Displays the out-

door air temperature as well as the outdoor fan speed (TAP).

O: Off; 1: Low Tap; 2: Medium Tap; 3: High Tap

Discharge Temperature and Outdoor Coil Temperature: Displays

the discharge temperature and outdoor coil temperature sensor

readings.

Defrost Sensor and Outdoor Liquid Temperature: Displays de-

frost sensor and outdoor liquid temperature sensor readings.

Pressure Sensor and Outdoor Suction Temperature: Displays the

pressure sensor and outdoor suction temperature sensor read-

ing.

NOTE: Oil Return Mode: In order to properly return oil to the

compressor, compressor speed may periodically adjust to assist

oil circulation.

MAINTENANCE

Pump down and charge modes can be enabled within this menu.

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Amana AVZC18 Owner's manual

Brand: Amana

Model: AVZC18

Category: Heat pumps

Type: Owner's manual

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Amana AVZC18 Owner's manual

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