Goodman DSXC160241AA, DSXC160241AB, DSXC160241AC, DSXC160361AA, DSXC160361AB Installation Manual

	CONDENSING UNIT										© 2009-2012 Goodman Manufacturing Company, L.P.
	AIR CONDITIONING										5151 San Felipe, Suite 500, Houston, TX 77056
											www.goodmanmfg.com -or- www.amana-hac.com
	INSTALLATION & SERVICE REFERENCE										P/N: IO-347H Date: November 2012
	IMPORTANT SAFETY INSTRUCTIONS										To receive the Lifetime Compressor Limited Warranty (good for
	The following symbols and labels are used throughout this										as long as you own your home), the 10-Year Unit Replacement
											Limited Warranty, and the 10-Year Parts Limited Warranty for
	manual to indicate immediate or potential safety hazards. It is										Goodman branded products, online registration must be com-
	the owner’s and installer’s responsibility to read and comply										pleted within 60 days of installation. Online registration is not
	with all safety information and instructions accompanying these										required in California or Quebec.
	symbols. Failure to heed safety information increases the risk										Complete warranty details available from your local dealer or,
	of personal injury, property damage, and/or product damage.
											for Goodman® brand products, visit www.goodmanmfg.com,
											and for Amana® brand products, visit www.amana-hac.com.
		WARNING
											IMPORTANT: To register your Goodman® brand unit, go to
	HIGH VOLTAGE !
	DISCONNECT ALL POWER BEFORE SERVICING.										www.goodmanmfg.com and click “Warranty Registration”.
											Complete registration as prompted.
	MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE
	TO DOS SO MAY CAUSE PROPERTY DAMAGE, PERSONAL										To register yourAmana® brand unit, go to www.amana-hac.com
	INJURY OR DEATH.										and click “Warranty Registration”. Complete registration as
											prompted.

WARNING

ONLY INDIVIDUALS MEETING THE REQUIREMENTS OF AN “ENTRY LEVEL

TECHNICIAN”, AT A MINIMUM, AS SPECIFIED BY THE AIR

CONDITIONING, HEATING AND REFRIGERATION INSTITUTE (AHRI) MAY USE THIS INFORMATION. ATTEMPTING TO INSTALL OR REPAIR THIS UNIT WITHOUT SUCH BACKGROUND MAY RESULT IN PRODUCT DAMAGE,

PERSONAL INJURY, OR DEATH.

CAUTION

SCROLL EQUIPPED UNITS SHOULD NEVER BE USED TO EVACUATE THE AIR CONDITIONING SYSTEM. VACUUMS THIS LOW CAN CAUSE INTERNAL ELECTRICAL ARCING RESULTING IN A DAMAGED OR FAILED COMPRESSOR.

IMPORTANT NOTE TO THE OWNER REGARDING PRODUCT WARRANTY

Your warranty certificate is supplied as a separate document with the unit installed by your contractor. Read the limited warranty certificate carefully to determine what is and is not covered and keep the warranty certificate in a safe place. If you are unable to locate the warranty certificate please contact your installing contractor or contact customer service (877- 254-4729) to obtain a copy.

To receive the Lifetime Unit Replacement Limited Warranty (good for as long as you own your home) and the 10-Year Parts Limited Warranty for Amana branded products, online registration must be completed within 60 days of installation. Online registration is not required in California or Quebec.

Product limited warranty certificates for models currently in production can be viewed at www.goodmanmfg.com or www.amana-hac.com. If your model is not currently in production or does not appear on the website, please contact your installing contractor or contact customer service (877-254-4729) to obtain a copy of your warranty certificate.

Each product overview page contains a Product Warranty link; by clicking on it you will be able to view the limited warranty coverage for that specific product. To view warranty registration information, click on the Product Warranty text on the left navigation panel on the home page of each website. The Online Product Registration pages are located in this same section.

SHIPPING INSPECTION

Always keep the unit upright; laying the unit on its side or top may cause equipment damage. Shipping damage, and subsequent investigation is the responsibility of the carrier. Verify the model number, specifications, electrical characteristics, and accessories are correct prior to installation. The distributor or manufacturer will not accept claims from dealers for transportation damage or installation of incorrectly shipped units.

CODES & REGULATIONS

This product is designed and manufactured to comply with national codes. Installation in accordance with such codes and/ or prevailing local codes/regulations is the responsibility of the installer. The manufacturer assumes no responsibility for equipment installed in violation of any codes or regulations. Rated performance is achieved after 72 hours of operation. Rated

is a registered trademark of Maytag Corporation or its related companies and is used under license to Goodman Company, L.P., Houston, TX. All rights reserved.

performance is delivered at the specified airflow. See outdoor unit specification sheet for split system models or product specification sheet for packaged and light commercial models. Specification sheets can be found at www.goodmanmfg.com for Goodman® brand products or www.amana-hac.com for Amana® brand products. Within either 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 issued 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 or air handler, the system must be manufacturer approved and Air Conditioning, Heating and Refrigeration Institute (AHRI) matched. NOTE: Installation of unmatched systems is strongly discouraged.

Operating the unit in a structure that is not complete (either as part of new construction or renovation) will void the warranty.

FEATURES

This air conditioner is a part of the ComfortNet™ family of products. It may be installed as part of a “legacy” system using a standard 24 VAC thermostat. However, with the CTK0* ComfortNet thermostat kit, this air conditioner may be installed as part of a digitally communicating system. The ComfortNet system provides automatic airflow configuration, enhanced setup features, and enhanced diagnostics. It also reduces the number of thermostat wires to a maximum of four and a minimum of two.

INSTALLATION CLEARANCES

Special consideration must be given to location of the condensing 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 obstruction 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 appropriate 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 installations are strongly discouraged.

	NOT
	RECOMMENDED
	B
A	AA
	C
	AA

B

OK!

B

B

		AA
	C		OK!
	AA	AA	OK!
			OK!
			OK!

A	AA		AA
	C		C
Minimum Airflow Clearance
Model Type		A	B	C	AA
Residential		10"	10"	18"	20"
Light Commercial		12"	12"	18"	24"

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. Ensure the foundation is sufficient to support the unit. A concrete slab raised above ground level provides a suitable base.

ROOFTOP INSTALLATIONS

If it is necessary to install this unit on a roof structure, ensure the roof structure can support the weight and that proper consideration 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 absorbing pads or springs can be installed between the condensing unit legs or frame and the roof mounting assembly to reduce noise vibration.

SAFE REFRIGERANT HANDLING

While these items will not cover every conceivable situation, they should serve as a useful guide.

WARNING

TO AVOID POSSIBLE INJURY, EXPLOSION OR DEATH, PRACTICE SAFE HANDLING OF REFRIGERANTS.

2

WARNING

REFRIGERANTS ARE HEAVIER THAN AIR. THEY CAN “PUSH OUT” THE OXYGEN IN YOUR LUNGS OR IN ANY ENCLOSED SPACE. TO AVOID POSSIBLE DIFFICULTY IN BREATHING OR DEATH:

• NEVER PURGE REFRIGERANT INTO AN ENCLOSED ROOM OR SPACE. BY LAW, ALL REFRIGERANTS MUST BE RECLAIMED.

• IF AN INDOOR LEAK IS SUSPECTED, THOROUGHLY VENTILATE THE AREA BEFORE BEGINNING WORK.

• LIQUID REFRIGERANT CAN BE VERY COLD. TO AVOID POSSIBLE FROST BITE OR BLINDNESS, AVOID CONTACT AND WEAR GLOVES AND GOGGLES. IF LIQUID REFRIGERANT DOES CONTACT YOUR SKIN OR EYES, SEEK MEDICAL

HELP IMMEDIATELY.

•ALWAYS FOLLOW EPA REGULATIONS. NEVER BURN REFRIGERANT, AS

POISONOUS GAS WILL BE PRODUCED.

WARNING

TO AVOID POSSIBLE EXPLOSION, USE ONLY RETURNABLE (NOT DISPOSABLE) SERVICE CYLINDERS WHEN REMOVING REFRIGERANT FROM A SYSTEM.

• ENSURE THE CYLINDER IS FREE OF DAMAGE WHICH COULD LEAD TO A LEAK OR EXPLOSION.

•ENSURE THE HYDROSTATIC TEST DATE DOES NOT EXCEED 5YEARS.

•ENSURE THE PRESSURE RATING MEETS OR EXCEEDS 400 PSIG. WHEN IN DOUBT, DO NOT USE CYLINDER.

WARNING

TO AVOID POSSIBLE EXPLOSION:

• NEVER APPLY FLAME OR STEAM TO A REFRIGERANT CYLINDER. IF YOU MUST HEAT A CYLINDER FOR FASTER CHARGING, PARTIALLY IMMERSE IT IN WARM WATER.

•NEVER FILL A CYLINDER MORE THAN 80% FULL OF LIQUID REFRIGERANT.

•NEVER ADD ANYTHING OTHER THAN R 22 TO AN R 22 CYLINDER OR R

410A TO AN R 410A CYLINDER. THE SERVICE EQUIPMENT USED MUST BE LISTED OR CERTIFIED FOR THE TYPE OF REFRIGERANT USED.

•STORE CYLINDERS IN A COOL, DRY PLACE. NEVER USE A CYLINDER AS A

PLATFORM OR A ROLLER.

REFRIGERANT LINES

CAUTION

THE COMPRESSOR POE OIL FOR R 410A UNITS IS EXTREMELY SUSCEPTIBLE TO MOISTURE ABSORPTION AND COULD CAUSE COMPRESSOR FAILURE. DO NOT LEAVE SYSTEM OPEN TO ATMOSPHERE ANY LONGER THAN NECESSARY FOR INSTALLATION.

Do NOT let refrigerant lines come in direct contact with plumbing, ductwork, floor joists, wall studs, floors, and walls. When running 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 between 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 suction line.

These sizes are suitable for line lengths of 79 feet or less. If a run of more than fifty feet is required, refer to Remote Cooling Service Manual, or TP-106 Long Line Set Application R-22, or TP-107 Long Line Set Application R-410A or contact your distributor for assistance.

Insulation is necessary to prevent condensation from forming and dropping from the suction line. Armflex (or satisfactory equivalent) with 3/8” min. wall thickness is recommended. In severe conditions (hot, high humidity areas) 1/2” insulation may be required. Insulation must be installed in a manner which protects tubing from damage and contamination.

Where possible, drain as much residual compressor oil from existing systems, lines, and traps; pay close attention to low areas where oil may collect. NOTE: If changing refrigerant types, ensure the indoor coil and metering device is compatible with the type of refrigerant being used; otherwise, the indoor coil must be replaced.

RECOMMENDED INTERCONNECTING TUBING (Ft)

Cond		0-24			25-49		50-79*
Unit				Line Diameter (In. OD)
Tons		Suct		Liq	Suct	Liq	Suct	Liq
1	1/2	5/8		1/4	3/4	3/8	3/4	3/8
	2	5/8		1/4	3/4	3/8	3/4	3/8
2	1/2	5/8		1/4	3/4	3/8	7/8	3/8
	3	3/4		3/8	7/8	3/8	1 1/8	3/8
3	1/2	7/8		3/8	1 1/8	3/8	1 1/8	3/8
	4	7/8		3/8	1 1/8	3/8	1 1/8	3/8
	5	7/8		3/8	1 1/8	3/8	1 1/8	3/8

* Lines greater than 79 feet in length or vertical elevation changes more than 50 feet refer to the Remote Cooling

Service Manual or contact your distributor for assistance.

Use only refrigerant grade (dehydrated and sealed) copper tubing to connect the condensing unit with the indoor evaporator. 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.

3

BURYING REFRIGERANT LINES

If burying refrigerant lines can not be avoided, use the following checklist.

1.Insulate liquid and suction lines separately.

2.Enclose all underground portions of the refrigerant lines in waterproof material (conduit or pipe) sealing the ends where tubing enters/exits the enclosure.

3.If the lines must pass under or through a concrete slab, ensure lines are adequately protected and sealed.

REFRIGERANT LINE CONNECTIONS

IMPORTANT

To avoid overheating the service valve, TXV valve, 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 POE 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.Ensure the 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. This is especially important on suction line filter driers which are continually wet when the unit is operating.

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.

NOTE: Before brazing, verify indoor piston size by checking the piston kit chart packaged with indoor unit.

LEAK TESTING (NITROGEN OR NITROGEN-TRACED)

WARNING

TO AVOID THE RISK OF FIRE OR EXPLOSION, NEVER USE OXYGEN, HIGH

PRESSURE AIR OR FLAMMABLE GASES FOR LEAK TESTING OF A REFRIGERATION SYSTEM.

WARNING

TO AVOID POSSIBLE EXPLOSION, THE LINE FROM THE NITROGEN CYLINDER MUST INCLUDE A PRESSURE REGULATOR AND A PRESSURE RELIEF VALVE. THE PRESSURE RELIEF VALVE MUST BE SET TO OPEN AT NO MORE THAN 150 PSIG.

Pressure test the system using dry nitrogen and soapy water to locate leaks. 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 evacuation.

SYSTEM EVACUATION

Condensing unit liquid and suction valves 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 system is evacuated.

4

WARNING

REFRIGERANT UNDER PRESSURE!

FAILURE TO FOLLOW PROPER PROCEDURES MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

NOTE: Scroll compressors should never be used to evacuate or pump down a heat pump or air conditioning system.

CAUTION

PROLONGED OPERATION AT SUCTION PRESSURES LESS THAN 20 PSIG FOR MORE THAN 5 SECONDS WILL RESULT IN OVERHEATING OF THE SCROLLS AND PERMANENT DAMAGE TO THE SCROLL TIPS, DRIVE BEARINGS AND INTERNAL SEAL.

1.Connect the vacuum pump with 250 micron capability to the service valves.

2.Evacuate the system to 250 microns or less using suction 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 startup.

•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
MICRONSIN	4500
	3000
	4000
	3500									LEAK(S)
										PRESENT
ACUUMV	2000
	2500
	1500					CONDENSIBLES OR SMALL
						LEAK PRESENT
	1000
						NO LEAKS
	500
						NO CONDENSIBLES
	0		1	2	3	4	5	6	7	8	9	10
							MINUTES

ELECTRICAL CONNECTIONS

WARNING

HIGH VOLTAGE!

DISCONNECT ALL POWER BEFORE SERVICING. MULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR DEATH DUE TO ELECTRIC SHOCK. WIRING MUST CONFORM WITH NEC OR CEC AND ALL LOCAL CODES. UNDERSIZED WIRES COULD CAUSE POOR EQUIPMENT PERFORMANCE, EQUIPMENT DAMAGE OR FIRE.

WARNING

TO AVOID THE RISK OF FIRE OR EQUIPMENT DAMAGE, USE COPPER CONDUCTORS.

NOTICE

UNITS WITH RECIPROCATING COMPRESSORS AND NON BLEED TXV’S REQUIRE A HARD START KIT.

The condensing unit rating plate lists pertinent electrical data necessary for proper electrical service and overcurrent protection. Wires should be sized to limit voltage drop to 2% (max.) from the main breaker or fuse panel to the condensing unit. Consult 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 furnace/air handler for specific wiring connections and indoor unit configuration. Likewise, consult the instructions packaged with the thermostat for mounting and location information.

OVERCURRENT PROTECTION

The following overcurrent protection devices are approved for use.

•Time delay fuses

•HACR type circuit breakers

These devices have sufficient time delay to permit the motorcompressor to start and accelerate its load.

HIGH VOLTAGE CONNECTIONS

Route power supply and ground wires through the high voltage port and terminate in accordance with the wiring diagram provided inside the control panel cover.

LOW VOLTAGE CONNECTIONS

Condensing unit control wiring requires a nominal 24 VAC (+/- 6 VAC), 60 Hz, minimum 25 VA service from either the indoor or outdoor transformer packaged with the optional CTK0* communicating thermostat kit. Low voltage wiring for the condensing units depends on the thermostat used. The unit is designed to work as part of a fully communicating HVAC system utilizing the ComfortNet™, CTK0* thermostat, ComfortNet com-

5

patible indoor unit, and up to four wires. The unit also has legacy 24 VAC inputs to support non-communicating systems. Route control wires through the low voltage port and terminate in accordance with the wiring diagram provided inside the control panel cover.

HIGH

VOLTAGE

PORT

LOW

VOLTAGE

PORT

Voltage Ports

NOTE: If the condensing unit is wired in the communicating mode together with the compatible communicating indoor unit and thermostat, then the communicating thermostat is able to search and identify the condensing unit when power is applied to the system. Refer to the Installation Manual of the communicating thermostat for more information.

Thermostat

Two-Stage Heating

Y2 with

Two-Stage Cooling

	Y2	FURNACE OR
		AIR HANDLER

Y2

OD UNIT

Two-Stage Non-Communicating Thermostat

Low Voltage Wire Connection (legacy mode)

	Communicating
2	Thermostat

COMMUNICATING 2 FURNACE OR

AIR HANDLER

R	COMMUNICATING
	OD UNIT

Two-Stage Communicating Thermostat

Low Voltage Wire Connection (communicating mode)

SYSTEM START UP

CAUTION

POSSIBLE REFRIGERANT LEAK!

TO AVOID A POSSIBLE REFRIGERANT LEAK, OPEN THE SERVICE VALVES UNTIL THE TOP OF THE STEM IS 1/8” FROM THE RETAINER.

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 opening valves without a retainer remove service valve cap and insert 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.

NOTE: These are not back-seating valves. It is not necessary to force the stem tightly against the rolled lip.

NOTE: Power must be supplied to the 18 SEER outdoor units containing ECM motors before the power is applied to the indoor unit. Sending a low voltage signal without high voltage power present at the outdoor unit can cause malfunction of the control module on the ECM motor.

Adequate refrigerant charge for a matching evaporator and 15 feet line set is supplied with the condensing unit. If line set exceeds 15 feet in length, refrigerant should be added at .6 ounces per foot of liquid line.

Open the suction service valve first! If the liquid service valve is opened first, oil from the compressor may be drawn into the indoor coil TXV, restricting refrigerant flow and affecting operation of the system.

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 (1 wrench flat) to properly seat the sealing surfaces.

Do not introduce liquid refrigerant from the cylinder into the crankcase of the compressor as this may damage the compressor.

1.Break vacuum by fully opening liquid and suction base valves.

2.Set thermostat to call for cooling. Check indoor and outdoor fan operation and allow system to stabilize for 10 minutes for fixed orifices and 20 minutes for expansion valves.

6

CHARGE VERIFICATION

WARNING

REFRIGERANT UNDER PRESSURE!

•DO NOT OVERCHARGE SYSTEM WITH REFRIGERANT.

•DO NOT OPERATE UNIT IN A VACUUM OR AT NEGATIVE PRESSURE. FAILURE TO FOLLOW PROPER PROCEDURES MAY CAUSE PROPERTY

DAMAGE, PERSONAL INJURY OR DEATH.

CAUTION

USE REFRIGERANT CERTIFIED TO AHRI STANDARDS. USED REFRIGERANT MAY CAUSE COMPRESSOR DAMAGE, AND IS NOT COVERED UNDER THE WARRANTY. MOST PORTABLE MACHINES CANNOT CLEAN USED REFRIGERANT TO MEET AHRI STANDARDS.

NOTICE

VIOLATION OF EPA REGULATIONS MAY RESULT IN FINES OR OTHER PENALTIES.

SATURATED SUCTION PRESSURE

TEMPERATURE CHART

	SUCTION PRESSURE	SATURATED SUCTION
		TEMPERATURE ºF
	PSIG	R-22	R-410A
	50	26	1
	52	28	3
	54	29	4
	56	31	6
	58	32	7
	60	34	8
	62	35	10
	64	37	11
	66	38	13
	68	40	14
	70	41	15
	72	42	16
	74	44	17
	76	45	19
	78	46	20
	80	48	21
	85	50	24
	90	53	26
	95	56	29
	100	59	31
	110	64	36
	120	69	41
	130	73	45
	140	78	49
	150	83	53
	160	86	56
	170	90	60

CAUTION

OPERATING THE COMPRESSOR WITH THE SUCTION VALVE CLOSED MAY CAUSE SERIOUS COMPRESSOR DAMAGE.

FINAL CHARGE ADJUSTMENT

The outdoor temperature must be 60°F or higher. Set the room thermostat to COOL, fan switch to AUTO, and set the temperature control well below room temperature.

After system has stabilized per startup instructions, check subcooling and superheat as detailed in the following section.

CAUTION

TO PREVENT PERSONAL INJURY, CAREFULLY CONNECT AND DISCONNECT MANIFOLD GAUGE HOSES. ESCAPING LIQUID REFRIGERANT CAN CAUSE BURNS. DO NOT VENT REFRIGERANT INTO THE ATMOSPHERE. RECOVER ALL REFRIGERANT DURING SYSTEM REPAIR AND BEFORE FINAL UNIT DISPOSAL.

SATURATED LIQUID PRESSURE

TEMPERATURE CHART

	LIQUID PRESSURE	SATURATED LIQUID
		TEMPERATURE ºF
	PSIG	R-22	R-410A
	200	101	70
	210	105	73
	220	108	76
	225	110	78
	235	113	80
	245	116	83
	255	119	85
	265	121	88
	275	124	90
	285	127	92
	295	130	95
	305	133	97
	325	137	101
	355	144	108
	375	148	112
	405	155	118
	415	157	119
	425	n/a	121
	435	n/a	123
	445	n/a	125
	475	n/a	130
	500	n/a	134
	525	n/a	138
	550	n/a	142
	575	n/a	145
	600	n/a	149
	625	n/a	152

7

	EXPANSION VALVE SYSTEM	decrementing to the least recent fault. The faults may
	NOTE: Units matched with indoor coils equipped with	be cleared by depressing the button for greater than five
		seconds. Consecutively repeated faults are displayed
	non-adjustable TXV should be charged by subcooling	a maximum of three times. Refer to the fault code
	only.	definitions at the end of this manual for more details.
	Run the remote on low stage cooling for 10 minutes until refrig-	4. “TERM” dipswitch is used for communications bus
	erant pressures stabilize. Use the following guidelines and meth-	configuration. Leave the settings to the factory default
	ods to check unit operation and ensure that the refrigerant	position.
	charge is within limits. Charge the unit on low stage.	5. “LEARN” push button is used in communication mode
	1. Purge gauge lines. Connect service gauge manifold to	to support device recognition on start-up. As the
	base-valve service ports.	communication system supports automatic identification
	2. Temporarily install a thermometer on the liquid line at	of both indoor unit and outdoor unit, this button is not
		used for a normal start-up.
	the liquid line service valve and 4-6" from the compressor
	on the suction line. Ensure the thermometer makes	COMFORTNET™ SYSTEM
	adequate contact and is insulated for best possible
	readings. Use liquid line temperature to determine sub-	OVERVIEW
	cooling and vapor temperature to determine superheat.	The ComfortNet system (or CT system) is a system that in-
	3. Check subcooling and superheat. Systems with TXV
		cludes a ComfortNet compatible air handler/furnace/modular
	application should have a subcooling of 5 to 7ºF and	blower and air conditioner or heat pump with a CTK0*AA ther-
	superheat of 7 to 9 ºF.	mostat. Any other system configurations are considered in-
	a. If subcooling and superheat are low, adjust TXV to 7	valid ComfortNet systems and must be connected as a tradi-
	to 9 ºF superheat, then check subcooling.	tion (or legacy) system. The table below compares the valid
	NOTE: To adjust superheat, turn the valve stem	CT systems.
	clockwise to increase and counter clockwise to de-
		CT compatible	CT compatible	Full CT system
	crease.	Air Handler/Furnace/Modular
			Air Conditioner	benefits & features
	b. If subcooling is low and superheat is high, add charge	Blower
	to raise subcooling to 5 to 7 ºF then check super-	CT compatible	CT compatible	Full CT system
		Air Handler/Furnace/Modular
	heat.		Heat Pump	benefits & features
		Blower
	c. If subcooling and superheat are high, adjust TXV
	valve to 7 to 9 ºF superheat, then check subcooling.	A ComfortNet heating/air conditioning system differs from a

d.If subcooling is high and superheat is low, adjust TXV valve to 7 to 9 ºF superheat and remove charge to lower the subcooling to 5 to 7 ºF.

NOTE: Do NOT adjust the charge based on suction pressure unless there is a gross undercharge.

4.Disconnect manifold set, installation is complete.

NOTE: Check the Schrader ports for leaks and tighten valve cores if necessary. Install caps finger-tight.

SUPERHEAT FORMULA =

SUCT. LINE TEMP. - SAT. SUCT. TEMP.

ADDITIONAL NOTES:

1.There are (4) LEDs on the PCB. See the Troubleshooting Tables at the end of this manual for definitions of the LED status.

2.When system is at Standby mode, press “TEST” push button to turn on both compressor and outdoor fan for five (5) seconds.

3.Press “RECALL” push-button to retrieve the six most recent faults. The control must be in Standby Mode (no thermostat inputs) to use the feature. Depress the pushbutton for approximately two seconds and less than five seconds. The LEDs will then display the six most recent faults beginning with the most recent fault and

legacy/traditional system in the manner in which the indoor unit, outdoor unit and thermostat interact with one another. In a traditional system, the thermostat sends commands to the indoor and outdoor units via analog 24 VAC signals. It is a one-way communication path in that the indoor and outdoor units typically do not return information to the thermostat.

On the other hand, the indoor unit, outdoor unit, and thermostat comprising a ComfortNet system “communicate” digitally with one another. It is now a two-way communications path. The thermostat still sends commands to the indoor and outdoor units. However, the thermostat may also request and receive information from both the indoor and outdoor units. This information may be displayed on the CT thermostat. The indoor and outdoor units also interact 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 and subsystem controls are powered with 24 VAC Thus, a maximum of 4 wires between the equipment and thermostat is all that is required to operate the system.

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