y-io, ea120 split system heat pumps outdoor units035-18549-001-a-0602 unitary products group 3...

INSTALLATIONINSTRUCTION

CAUTION: READ ALL SAFETY GUIDES BEFORE YOUBEGIN TO INSTALL YOUR UNIT.

SAVE THIS MANUAL

MODEL: EA120

O

O

O

OO

208/230/460VOLT ONLY

SPLIT-SYSTEM HEAT PUMPSOUTDOOR UNITS

035-18549-001-A-0602

CONTENTS

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . .4

AGENCY APPROVALS. . . . . . . . . . . . . . . . . . . . . . . . . .4

INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

See the following page for a complete Table of Contents.

NOTES, CAUTIONS AND WARNINGS

Installer should pay particular attention to the words:NOTE, CAUTION, and WARNING. Notes are intended toclarify or make the installation easier. Cautions are givento prevent equipment damage. Warnings are given toalert installer that personal injury and/or equipment dam-age may result if installation procedure is not handledproperly.

035-18549-001-A-0602

2 Unitary Products Group

TABLE OF CONTENTS

NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . 4

REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

AGENCY APPROVALS. . . . . . . . . . . . . . . . . . . . . . . 4

INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

LIMITATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

LOCATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

ROOF-TOP LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

GROUND LEVEL LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . 6

RIGGING AND HANDLING . . . . . . . . . . . . . . . . . . . . . . . . 6

CLEARANCES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

COMPRESSORS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

COMPRESSOR CRANKCASE HEATER. . . . . . . . . . . . . . . . . . 9

POWER AND CONTROL WIRING . . . . . . . . . . . . . . . . . . 9

POWER WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

PHASING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

CONTROL WIRING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

WIRE SIZING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

REFRIGERANT PIPING . . . . . . . . . . . . . . . . . . . . . . . . . 11

GENERAL GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

LINE SIZING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

SERVICE VALVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

EXTENDING THE SERVICE PORTS . . . . . . . . . . . . . . . 13

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

EVACUATING AND CHARGING. . . . . . . . . . . . . . . . . . . 15

ALTERNATE CHARGING METHODS . . . . . . . . . . . . . . . . . . . 16

BALANCE POINT SETTING . . . . . . . . . . . . . . . . . . . . . . 16

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

CRANKCASE HEATER . . . . . . . . . . . . . . . . . . . . . . . . . . 17

PRE-START CHECK . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

INITIAL START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

PHASING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

SYSTEM SEQUENCE OF OPERATION. . . . . . . . . . . . . 18

COOLING OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

HEATING OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

DEFROST CYCLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

OPERATION BELOW 0ºF OUTDOOR TEMPERATURE . . . . 20

EMERGENCY HEAT OPERATION . . . . . . . . . . . . . . . . . . . . 20

SAFETY FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

SECURE OWNER’S APPROVAL . . . . . . . . . . . . . . . . . . 21

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

LUBRICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

REPLACEMENT PARTS. . . . . . . . . . . . . . . . . . . . . . . . . 21

NOTICE TO OWNER . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

LIST OF FIGURES

Fig. # Pg. #

1 CENTER OF GRAVITY . . . . . . . . . . . . . . . . . . . . . . . . 6

2 TYPICAL RIGGING . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3 POINT LOADS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4 UNIT DIMENSIONS AND CLEARANCES. . . . . . . . . . 8

5 TYPICAL FIELD WIRING . . . . . . . . . . . . . . . . . . . . . 10

6 FIELD PIPING DIAGRAMS . . . . . . . . . . . . . . . . . . . . 12

7 EXTENDING THE SERVICE PORTS . . . . . . . . . . . . 15

8 REFRIGERANT FLOW DIAGRAM . . . . . . . . . . . . . . 15

9 CHARGING CURVE EA120(COOLING MODE) . . . . . . . . . . . . . . . . . . . . . . . . . . 17

LIST OF TABLES

Tbl. # Pg. #

1 PHYSICAL DATA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2 UNIT APPLICATION DATA . . . . . . . . . . . . . . . . . . . . . 5

3 ELECTRICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . 10

4 LIQUID LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

5 VAPOR LINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

6 REFRIGERANT LINE CHARGE . . . . . . . . . . . . . . . . 12

035-18549-001-A-0602

Unitary Products Group 3

NOMENCLATURE

PRODUCT NOMENCLATURE

YORK OUTDOOR SPLIT CONDENSING UNITS AND HEAT PUMPS

E A 120 C 00 A 2 A AA 1 A

Model #Model NumberDescription

Options

E Product Category H = Air Conditioner Split System E = Heat Pump Split System

A Product Identifier A = R-22 Standard Efficiency 2-Pipe

120Nominal CoolingCapacityMBH

090 = 7-1/2 Ton120 = 10 Ton150 = 12-1/2 Ton180 = 15 Ton240 = 20 Ton

C Heat Type C = Cooling Only

00Nominal HeatingCapacity

00 = No Heat Installed

A Airflow Options A = Standard Motor

2 Voltage2 = 208/230-3-604 = 460-3-60

A Installation OptionsA = NoneB = Disconnect

AA Additional OptionsAA = NoneAC = Technicoated Coil

1 Product Generation 1 = 1st Generation 2 = 2nd Generation

A Product Style A = Style A B = Style B

035-18549-001-A-0602


GENERAL

These heat pump units are designed for outdoor instal-lation on a roof or at ground level. Every unit is com-pletely piped and wired at the factory and is shippedready for immediate installation. Only the liquid andvapor lines to the indoor coil, the control wiring and themain power wiring are required to complete the instal-lation. Each unit is dehydrated, evacuated, leak testedand pressure tested at 450 psig before being pressur-ized with a holding charge of Refrigerant-22 for ship-ment and/or storage.

Every unit includes a heavy-duty compressor with linebreak overload protection, a suction line accumulator,a 4-way reversing valve, filter-drier, expansion valves,distributors, check valves, and a copper tube/aluminumfin coil.

All controls are readily accessible for maintenance,adjustment and service. All power and control wiringcan be routed through the front of the unit.

SAFETY CONSIDERATIONS

Installer should pay particular attention to the words:NOTE, CAUTION and WARNING. Notes are intendedto clarify or make the installation easier. Cautions aregiven to prevent equipment damage. Warnings aregiven to alert the installer that personal injury and/orequipment damage may result if the installation proce-dure is not handled properly.

REFERENCE

This instruction covers the installation of the outdoorunit. For information on the matching indoor, see PN#035-18475-001.

All accessories come with a separate installation man-ual. Refer to Parts Manual for complete listing ofreplacement parts on this equipment.

The above forms may be ordered from:

Standard Register2101 W. Tecumseh RdNorman, Oklahoma 73069Toll Free Tel. 877-318-9675Toll Free Fax. 877-379-7920

AGENCY APPROVALS

Design certified by UL as follows:

1. For use as a cooling/heat pump unit only.

2. For outdoor installation only.

INSPECTION

As soon as a unit is received, it should be inspected forpossible damage during transit. If damage is evident,the extent of the damage should be noted on the car-rier's freight bill. A separate request for inspection bythe carrier's agent should be made in writing. See Form50.15-NM for more information.

Improper installation may create a conditionwhere the operation of the product could causepersonal injury or property damage.

Improper installation, adjustment, alteration,service or maintenance can cause injury orproperty damage. Refer to this manual forassistance or additional information, consult aqualified installer or service agency.

This product must be installed in strict compli-ance with the enclosed installation instructionsand any applicable local, state, and nationalcodes including, but not limited to, building,electrical, and mechanical codes.

035-18549-001-A-0602


INSTALLATION

LIMITATIONS

These units must be installed in accordance with allnational and local safety codes. If no local codes apply,installation must conform with the appropriate nationalcodes. See Table 2 for unit application data. Units aredesigned to meet National Safety Code Standards. Ifcomponents are to be added to a unit to meet localcodes, they are to be installed at the dealer's and/orthe customer's expense.

LOCATION

Use the following guidelines to select a suitable loca-tion for these units.

1. The outdoor units must be installed outside thebuilding. The outdoor fans are the propeller typeand are not suitable for use with duct work.

2. The outdoor and indoor units should be installed asclose together as possible and with a minimumnumber of bends in the refrigerant piping. Refer toREFRIGERANT PIPING for additional information.

TABLE 1: PHYSICAL DATA

Description Unit Model EA120

Compressor1 Rating, (Tons) 10

Fans

Quantity 2

Diameter, (In.)/No. Blades 24/3

Nominal CFM 7830

Fan Motors2HP 3/4

RPM 1100

Coil

Face Area, (Sq. Ft.) 36.11

Rows Deep x Rows High 2 x 40

Finned Length, (In.) 130

Tube (Copper) OD - inches 3/8

Fins (Aluminum) per inch 20

Refrigerant-22(Lbs.)

Holding Charge 2.25

Operating Charge3 31.8

Unit Weight(Lbs.)

Shipping 857

1. These compressors are fully hermetic.2. These PSC motors are directly connected to the outdoor fans and have inherent protection, ball bearings and a 48 frame.3. Includes outdoor unit and matched indoor blower unit, but no piping. Refer to Table 6 for refrigerant line charge.

TABLE 2: UNIT APPLICATION DATA

MODEL EA120

Voltage Variation1

Min. / Max.

1. Rated in accordance with ARI Standard 110, utilizationrange “A”.

208/230-3-60 187 / 252

460-3-60 432 / 504

Air Temperature onOutdoor Coil, ºF

Min. / Max.

Cooling 40ºF / 125ºF

Heating 0ºF2 / 75ºF

2. Below 0ºF, the control system stops the compressorand allows the electric heat accessory to cycle at itsstandby capacity.

Air Temperature onIndoor Coil ºF

Min. / Max.

Cooling 57ºF / 72ºF

Heating 50ºF3 / 80ºF

3. Operation below this temperature is permissible for ashort period of time when a unit is required to heat theconditoned space up to 50ºF.

035-18549-001-A-0602


3. The outdoor unit should not be installed beneathwindows or between structures where normal oper-ating sounds may be objectionable.

4. All units require certain clearances for proper oper-ation and service. Refer to General InstallationForm 55.70-N1 for additional guidelines.

On either roof top or ground level installations, rubberpadding can be applied between the base rails andtheir supports to lessen any transmission of vibration.

ROOF-TOP LOCATIONS

Be careful not to damage the roof. Consult the buildingcontractor or architect if the roof is bonded. Choose alocation with adequate structural strength to supportthe unit.

The unit must be mounted on solid level supports. Thesupports can be channel iron beams or wooden beamstreated to reduce deterioration.

A minimum of two (2) beams are required to supporteach unit. The beams should: (1) Be positioned per-pendicular to the roof joists. (2) Extend beyond thedimensions of the unit to distribute the load on the roof,(3) Be capable of adequately supporting the entire unitweight. Refer to Figure 1 and Table 1 for load distribu-tion and weights.

These beams can usually be set directly on the roof.Flashing is not required.

NOTE: On bonded roofs, check for special installationrequirements.

GROUND LEVEL LOCATIONS

The units must be installed on a substantial base thatwill not settle. Any strain on the refrigerant lines maycause a refrigerant leak.

A one-piece concrete slab with footers that extendbelow the frost line is recommended. The slab shouldnot be tied to the building foundation because noiseand vibration will telegraph into the building.

A unit can also be supported by concrete piers. Thesepiers should: (1) extend below the frost line, (2) belocated under the unit's four corners and (3) be sized tocarry the entire unit weight. Refer to Figure 1 and Table1 for the center of gravity and unit weight.

A gravel bed or some other means of handling the con-densate that will drop from the underside of the unit coilduring the heating and defrost cycles may have to beprovided.

RIGGING AND HANDLING

Exercise care when moving the unit. Do not removeany packaging until the unit is near the place of installa-tion.

Rig the unit by attaching nylon straps with hooks to thelifting holes provided in the base rails. Spreaders,whose length exceeds the largest dimension acrossthe unit, MUST be used across the top of the unit if the

The outdoor unit should not be installed in anarea where mud and/or ice could cause per-sonal injury. Remember that condensate willdrip from the underside of the unit coils duringheat and defrost cycles and that this conden-sate will freeze when the temperature of theoutdoor air is below 32°F.

Care should be taken to protect the unit fromtampering and unauthorized persons frominjury. Screws on access panels will preventcasual tampering. Additional safety precau-tions such as fences around the unit or lockingdevices on the panels may be advisable.Check local authorities for safety regulations.

FIGURE 1 - CENTER OF GRAVITY

UnitDim. (In.)

A B C D

10 Ton 76-7/8 39-7/8 38-7/8 16

035-18549-001-A-0602


rigging height above the top of the unit is less than 5feet. See Figure 2.

BEFORE LIFTING A UNIT, MAKE SURE THAT ITSWEIGHT IS DISTRIBUTED EQUALLY ON THESTRAPS SO THAT IT WILL LIFT EVENLY.

Units may also be moved or lifted with a fork-lift. Slot-ted openings in the base rails are provided for this pur-pose.

LENGTH OF FORKS MUST BE A MINIMUM OF 54"when lifting from either side.

Remove the nesting brackets from the four corners ontop of the unit. All screws that are removed to takethese brackets off must be replaced on the unit.

Do not use straps under the unit or through thefork lift slots for lifting purposes. Sharp metaledges can damage the straps and could resultin personal injury or equipment damage.

FIGURE 2 - TYPICAL RIGGING

Before lifting the unit, make sure that itsweight is distributed equally on the cables sothat it will lift evenly.

SPREADER

BAR

LIFTING

HOLES

FIGURE 3 - POINT LOADS

A

D

B

C

UNIT4-POINT LOAD (lbs)

TOTAL A B C D

120 741 258 173 123 187

035-18549-001-A-0602


CLEARANCES

All units require certain minimum clearances for properoperation and service. Refer to Figure 4 for theseclearances.

Additional height may be required for snow clearance ifwinter operation is expected.

MINIMUM CLEARANCES

CLEARANCE DESCRIPTIONDISTANCE IN

INCHES

Overhead (Top)1

1. Units must be installed outdoors. Overhanging structures orshrubs should not obstruct condenser air discharge.

120

Front (Piping and Access Panels) 30Left Side 24Right Side 24Rear 24

Bottom2

2. Adequate snow clearance must be provided during winter oper-ation.

0

Do not permit overhanging structures or shrubsto obstruct air discharge.

FIGURE 4 - UNIT DIMENSIONS AND CLEARANCES

AIR

OUT

AIR

OUT

AIR

IN

44-1/4-

COMPRESSOR AND

FAN MOTOR ACCESS

76-7/8

39 - 7/8

OO

O

EXTERNAL PRESSURE

GAUGE FITTINGS

D

C

A

B

6-3 /4

EA120

15-3/4

7-3/4

All dimensions are in inches.They are subject to changewithout notice. Certifieddimensions will be providedupon request.

ConnectionEntry

Connection Size15 Ton

Suction Line A 1-1/8 ID

Liquid Line B 5/8 ID

Power Wiring C 2-1/8 KO

Control Wiring D 7/8 KO

035-18549-001-A-0602


COMPRESSORS

Units are shipped with compressor mountings factory-adjusted and ready for operation.

COMPRESSOR CRANKCASE HEATER

The compressor is equipped with a crankcase heaterto prevent refrigerant from mixing with crankcase oilduring the “OFF” cycle. The heaters will be energizedwhen the compressor is not running providing the unitdisconnect switch is closed.

If a unit has just been installed or the unit disconnectswitch has been open for a long period of time, movethe system switch on the room thermostat to the “OFF”position before closing the unit disconnect switch. Eighthours of crankcase heat are required to drive the liquidrefrigerant out of the compressor before the compres-sor can be started.

POWER AND CONTROL WIRING

Install electrical wiring in accordance with the latestNational Electrical Code (NFPA Standard No. 70) and/or local regulations. The unit should be grounded inaccordance with these codes.

POWER WIRING

Check the voltage of the power supply against the dataon the unit nameplate. Check the size of the powerwire, the disconnect switch and the fuses against thedata on Table 3.

NOTE: Copper conductors must be installed betweenthe disconnect switch and the unit.

Refer to Figure 4 for the location of the power wireaccess opening through the front of the unit. This open-ing will require a field-supplied conduit fitting.

The field-supplied disconnect switch must be suitablefor an outdoor location. Although it should be installednear the unit, do NOT secure it to the unit cabinet.

Refer to Figure 5 for typical field wiring.

PHASING

Scroll compressors operate in one direction only, if athree phase scroll compressor is experiencing:

• Low amperage draw

• Similar discharge and suction pressures

• Increased noise level

then the compressor is operating in reverse. To correctthis condition, switch any two (2) line voltage leads atthe contactor. Please note, single phase scroll com-pressors will start and run in one direction only. Thereverse operation is not a concern.

CONTROL WIRING

Refer to Figure 5 for the location of the control wireaccess opening through the front of the unit.

Route the necessary low voltage control wires (18 AwgMin) from terminal block TB2 of the unit control boxthrough this access opening to the indoor unit and tothe room thermostat. Refer to Figure 5 for typical fieldwiring.

The room thermostat should be mounted about 5 feetabove the floor and located where it will be exposed tonormal room air circulation. Do not locate it on an out-side wall, near a supply air grill, or where it may beaffected by sunlight and/or drafts. Circulation of air tothe thermostat should not be blocked by curtains,drapes, furniture, partitions, etc.

Some installations may require a locking cover to pro-tect the thermostat from tampering and/or damage.

WIRE SIZING

Refer to the following chart to size the control wiringproperly. If the wiring is undersized, voltage drop couldbecome excessive and result in malfunctioning of theunit controls.

Do Not loosen compressor mounting bolts.

Do not attempt to start the compressor withoutat least eight hours of crankcase heat or com-pressor damage will occur.

Units equipped with scroll compressors oper-ate in one direction only.

Incorrect scroll compressor rotation can dam-age or fail the compressor(s).

035-18549-001-A-0602


FIGURE 5 - TYPICAL FIELD WIRING

035-16602-001

TB1 can be routed

TB1

TB1

TB2

TABLE 3: ELECTRICAL DATA

MODELVOLTAGE

CODEUNIT POWER

SUPPLY

COMPRESSOR1 CONDENSER FAN MOTOR UNIT

QTY RLA LRA QTY HP FLA

MINIMUMCIRCUIT

AMPACITY(AMPS)

MAXIMUMFUSE SIZE2

(AMPS)

MINIMUMDISCONNECT SIZE3

(AMPS)

EA1202 208/230/3/60 1 42.0 239.0 2 3/4 3.0 58.5 100 100

4 460/3/60 1 19.2 125.0 2 3/4 1.6 27.2 45 45

1. The 208-230 V compressors and motors use a single tap for the entire range of voltages. The 208/230 V to 24 V transformershave different taps for 208 and 230 V.

2. Dual element, time delay type.3. Refer to article NEC/NFPA No. 70, articles 440-11,12 for information on minimum disconnect sizing.

035-18549-001-A-0602


REFRIGERANT PIPING

GENERAL GUIDELINES

Many service problems can be avoided by taking ade-quate precautions to provide an internally clean anddry system and by using procedures and materials thatconform with established standards.

Use hard drawn copper tubing where no appreciableamount of bending around pipes or other obstructionsis necessary. Use long radius ells wherever possiblewith one exception - short radius ells for the traps in allvapor risers. If soft copper is used, care should betaken to avoid sharp bends which may cause a restric-tion.

Pack fiber glass insulation and a sealing material suchas permagum around refrigerant lines where they pen-etrate a wall to reduce vibration and to retain someflexibility.

Support all refrigerant lines at minimum intervals withsuitable hangers, brackets or clamps.

Braze all copper to copper joints with Silfos-5 or equiv-alent brazing material. Do not use soft solder.

Insulate all vapor lines with a minimum of 1/2" ARMA-FLEX or equal. Liquid lines exposed to direct sunlightand/or high temperatures must also be insulated.

Never solder vapor and liquid lines together. They canbe taped together for convenience and support pur-poses, but they must be completely insulated fromeach other.

Never exceed the maximum line length listed in Table2.

LINE SIZING

The following factors should be considered when locat-ing the indoor and outdoor units and when sizing therefrigerant lines for a split heat pump system. Refer toFigure 6.

THE LIQUID LINE - The vertical rise should neverexceed 50 feet because liquid refrigerant will lose 0.5psi of static head for each vertical foot.

The total pressure loss for a field-installed liquid lineshould never exceed 40 psi because the liquid refriger-ant could flash before it reaches the expansion valve.This flashing will not only cause erratic valve operationand poor system performance, but could also damagethe expansion valve.

Total pressure loss includes the static head lossexplained above plus the friction losses due to thelength of the line (Table 4) and number of fittings in theline.

When the indoor unit is above the outdoor unit, the fric-tion loss through the 1-1/8" OD vapor riser will be moreof a limiting factor than the loss of static head in the liq-uid riser. See Example #3 and #4 for the VAPORLINE.

THE VAPOR LINE - A vapor line should not only besized for a friction loss of 3 psi (2°F) but also for theproper return of oil to the compressor during both thecooling and heating cycles.

Friction loss should always be based on cooling opera-tion because refrigerant flow rates will be greater dur-ing the cooling cycle than during the heating cycle.

TABLE 4: LIQUID LINES

SystemModel

Refrigerant

Flow Rate,1

(Lbs/Min)

1. Based on Refrigerant-22 at the nominal cooling capacity of the system, a liq-uid temperature of 105ºF and a vapor temperature of 40ºF. Since refrigerantflow rates will be a little lower at the nominal heating capacity of each sys-tem, liquid line friction loss should always be based on cooling operation.

Type “L”CopperTubing,(In. OD)

Pressure Drop2

2. These friction losses do not include any allowance for fittings.

Friction,3

(PSI/100 Ft.)

3. The total pressure drop of the liquid line for both friction and vertical risemust not exceed 40 PSI. If the pressure drop exceeds 40 PSI, the liquidrefrigerant could flash before it reaches the expansion valve. This flashingwill not only cause erratic valve operation and poor system performance, butcould also damage the expansion valve.

Vertical Rise(PSI/Ft.)

EA120/FA120 30.0 5/8 3.5 0.5

035-18549-001-A-0602


Oil return will be critical during:

1. The cooling cycle when the outdoor unit is abovethe indoor unit (detail 1 of Figure 6).

2. The heating cycle when the indoor unit is abovethe outdoor unit (detail 4 of Figure 6).

When the indoor unit is above the outdoor unit, the sizeof the vapor riser must be reduced to 1-1/8" OD so thatthe velocity of the refrigerant will be great enough tocarry oil up the riser during the heating cycle.

When 1-1/8" OD tubing must be used for the riser, themaximum length for the vapor line will be greatlyreduced as shown in the following examples.

EXAMPLES:

#1 - 10 Ton System89 feet of 1-3/8" OD, type “L” copper tubing

(89 feet x 2.8 psi/100 feet) . . . . . . . . . . . . . . . . 2.5 psiFitting*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5 psi

Vapor Line Pressure Drop = 3.0 psi

#2 - 10 Ton System29 feet of 1-1/8" OD, type “L” copper tubing (vertical)

(29 feet x 8.0 psi/100 feet) . . . . . . . . . . . . . . . . .2.3 psi7 feet of 1-3/8" OD, type “L” copper tubing (horizontal)

(7 feet x 2.8 psi/100 feet) . . . . . . . . . . . . . . . . . .0.2 psiFitting* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5 psi

Vapor Line Pressure Drop = 3.0 psi

*Determine the pressure drop of the fittings for each installation - DO NOT usethe estimated values as shown in the above examples.

Although longer vapor lines are permissible, frictionlosses exceeding 3 psi (2°F) will reduce system capac-ity in both the cooling and heating cycles.

SERVICE VALVES

These outdoor units have both vapor and liquid lineservice valves.

Both valves are shipped from the factory front-seatedand closed with the valve stem in the maximum clock-wise position.

These service valves are the back-seating type andhave a 1/4" male flare access port for evacuating andcharging the system.

FIGURE 6 - FIELD PIPING DIAGRAMS(Cooling/Heating Refrigerant Flow)

TABLE 5: VAPOR LINES

SystemModel

Refrigerant

Flow Rate,1

(Lbs/Min)

1. Based on Refrigerant-22 at the nominal cooling capacity of the system, avapor temperature of 40ºF and a liquid temperature of 105ºF. Since refriger-ant flow rates will be a little lower at the nominal heating capacity of each sys-tem, vapor line friction loss should always be based on cooling operation.

Type “L”Copper Tubing

(In. OD)

Friction

Loss, 2,3

(PSI/100 Ft.)

2. Although vapor lines should be sized for a friction loss equivalent to a 2ºFchange in saturation temperature (or approximately 3 psi), sizing the lines forthe proper return of oil is more important.

3. These friction losses do not include any allowance for fittings. Only use a1-1/8” riser when the indoor unit is above the outdoor unit.

EA120 30.01-1/8 4.7

1-3/8 1.6

TABLE 6: REFRIGERANT LINE CHARGE1

1. Charges are based on 40ºF suction temperature and 105ºF liquid tempera-ture.

Refrigerant

Line2

2. Type “L” copper tubing.

Line Size,OD (In.)

Refrigerant Charge(Lb/Ft)

Liquid 5/8 0.113

Vapor1-1/8

0.0131-3/8

035-18549-001-A-0602


Schrader access valves are provided on the compres-sor vapor and discharge lines for pressure checkingthe system.

All access ports are sealed with a removable cap.Never remove a cap unless the valve is fully back-seated with its valve stem in the maximum counter-clockwise position because the refrigerant charge willbe lost.

EXTENDING THE SERVICE PORTS

Refer to Figure 7:

1. Loosen the screws securing the service ports inshipping position. (See Figure 7).

2. Push the service ports through the corner post.

3. Tighten the screws to secure the service ports forinstallation.

INSTALLATION

Since the condensing units are shipped with a holdingcharge of refrigerant-22, they can be checked for arefrigerant leak by depressing the stem on either of theservice ports that extend through the cabinet. As soonas some internal pressure is relieved release the stem.DO NOT release the entire holding charge.

If the unit has already lost its holding charge, it shouldbe leak tested and the necessary repairs should bemade. If the unit has maintained its holding charge, youcan assume that it has no leaks and proceed with theinstallation.

Before installing the liquid line between the outdoorand indoor units, remove the copper disc from the liq-uid connection on the outdoor unit per the followingprocedure:

1. Make sure the refrigerant in the line has beenrecovered and that the liquid service valve on theunit is front-seated and closed. The valve stemshould be turned to its maximum clockwise posi-tion.

2. Drill a small hole through the disc before unbrazingit to permit a flow of dry nitrogen through the con-nection while it is being unbrazed.

3. Remove the cap from the 1/4" access port on theliquid line stop valve.

4. Connect a supply of dry nitrogen to this accessport.

5. Unbraze the copper disc from the liquid connectionwhile maintaining a minimum flow of dry nitrogenthrough the connection.

6. Burnish the external surfaces of the liquid connec-tion on the outdoor unit and the end of the field-supplied piping being used for the liquid line.

NOTE: Clean surfaces are essential for a well brazedconnection.

7. Carefully clean the internal surfaces of the above.Any particles left on these surfaces may lead to afuture system malfunction.

NOTE: Use only copper tubing that has been espe-cially cleaned and dehydrated for refrigerantuse. If the tubing has been open for an

When making a braze connection, wrap a wetrag around all tubing inside the unit to preventdamage to the other components.

Dry nitrogen should always be suppliedthrough a connection while it is being brazed orunbrazed because the temperature required tomake or break a brazed joint is sufficiently highto cause oxidation of the copper unless an inertatmosphere is provided. The flow of nitrogenshould be continued until the joint has cooled.

The dry nitrogen must always be suppliedthrough a pressure regulating valve.

This hole is also required to prevent the inter-nal pressure from building up as the disc isbeing unbrazed and from blowing the disc off.

This warning applies to any disc beingremoved from a service valve, coil connection,etc.

035-18549-001-A-0602


extended period of time, it should be cleanedbefore being used.

The liquid line connections can now be brazed whilemaintaining a minimum flow of dry nitrogen through thepiping.

NOTE: A filter-drier is factory-mounted in the outdoorunit for the heating cycle and in the indoor unitfor the cooling cycle.

Do NOT install another filter-drier in the field-supplied liquid line because refrigerant willflow in both directions on a heat pump system.

1. The matched air handlers are shipped with a smallR-22 charge and they should be checked for leaksbefore installation. Drill a small hole through thesealing cap or disc in both the liquid and suctionconnection. If there is a pressure release, theevaporator has no leaks and you can proceed withinstallation. If the charge has been lost, the coilsshould be leak tested and the necessary repairsmade.

2. Move the dry nitrogen supply from the access porton the liquid line service valve of the outdoor unit tothe hole through the vapor disc on the indoor unit.

3. Unbraze the coil's liquid line disc while maintaininga flow of dry nitrogen across the connection andthrough the hole in the liquid line disc.

4. After the disc has been removed, burnish the exter-nal surfaces and clean the internal surfaces as out-lined above.

5. Move the dry nitrogen supply back to the accessport on the liquid line service valve.

6. Braze the liquid line to the liquid connection on theindoor unit while maintaining a minimum flow of drynitrogen through the liquid line, the indoor coil andthe hole in the vapor disc.

7. Unbraze the disc on the vapor connection of theindoor unit while maintaining the flow of dry nitro-gen.

8. After the disc has been removed, burnish the exter-nal surfaces and clean the internal surfaces as out-lined above.

The vapor piping can now be brazed to the vapor con-nection on the indoor unit while maintaining a minimumflow of dry nitrogen.

Before brazing the vapor line to the outdoor unit, makesure the refrigerant in the line has been recovered,then remove the copper disc from its vapor connectionper the following procedure:

1. Make sure that the vapor line service valve on theoutdoor unit is front-seated and closed with itsvalve stem in the maximum clockwise position.

2. Drill a small hole through the disc before unbrazingit to permit a flow of dry nitrogen through the con-nection while its being unbrazed.

3. Move the dry nitrogen supply to the access port onthe vapor line service valve of the outdoor unit.

4. Unbraze the disc on the vapor line connection ofthe outdoor unit while maintaining a minimum flowof dry nitrogen through the access port of the vaporline service valve and the hole in the vapor disc.

5. After the disc has been removed, burnish the exter-nal surfaces and clean the internal surfaces of thevapor connection and the vapor piping.

The vapor line can now be brazed to the vapor connec-tion on the outdoor unit while maintaining the flow ofdry nitrogen.

After the liquid and vapor lines have been installed, thesystem should be evacuated and charged.

035-18549-001-A-0602


EVACUATING AND CHARGING

With the liquid and suction line service valves closed,connect a vacuum pump through a charging manifoldto the access ports on both the liquid and suction lineservice valves.

NOTE: The vacuum pump connection should be shortand no smaller than 3/8" O.D.

The refrigerant lines and the indoor coil must now beevacuated to 500 Microns without disturbing thecharge in the condenser coil or the compressor.

After proper evacuation and dehydration, charge refrig-erant through the access port on the liquid line servicevalve allowing the vacuum to draw in as much refriger-ant as possible.

To continue charging refrigerant in the cooling mode,open the liquid and the vapor line service valves fully.Turn the stem of the liquid service valve clockwise 1/4turn to open its access port for reading pressure.

Start the compressor (after 8 hours of crankcase heat),turn the stem of the vapor line service valve clockwise1/4 turn to open its service port and continue to chargerefrigerant gas through this suction access port untilyou meet the conditions shown on the charging curve,Figure 9.

Open the liquid and vapor line service valves fully toclose their access ports after the system has beencharged.

FIGURE 7 - EXTENDING THE SERVICE PORTS

COPPER

2 SCREWS

CORNER

POST

SERVICE PORTS IN SHIPPING POSITION

UNIT WALL

SIDE VIEW

COPPER

TUBE

UNIT

WALL

COPPER

2 SCREWS

CORNER

POST

TOP VIEW

UNIT

WALL

LOOSEN

SCREWS

SIDE VIEW(AS SHIPPED)

PUSH SERVICE

PORTS THROUGH

CORNER POST

TIGHTEN SCREWS

SIDE VIEWSERVICE PORTS

EXTENDED( )

SERVICE PORTS

EXTENDED( )

SERVICE PORTS IN INSTALLED POSITION

Do not charge liquid refrigerant through thecompressor suction connection.

Do not attempt to start the compressor withoutat least 8 hours of crankcase heat or compres-sor damage will occur.

035-18549-001-A-0602


ALTERNATE CHARGING METHODS

If you are starting a unit when the ambient temperatureis higher or lower than those shown in Figure 9, eitherof the following methods may be used.

Method 1: Determine the total weight of the refriger-ant for the total system by adding therequired charge for the outdoor unit, theindoor unit and the refrigerant lines usinginformation in Tables 1 (Physical Data)and 6 (Refrigerant Line Charge). Using thecharging procedures outlined above,weigh the required amount of refrigerantcharge into the unit.

Method 2: Install a field supplied moisture indicatingsight glass in the liquid line between the fil-ter-drier and the evaporator coil.

Using the charging procedure outlinedabove, charge refrigerant until the mois-ture indicating sight glass is clear. Addapproximately 1 extra pound of refrigerantto assure a liquid refrigerant seal at theexpansion valve under all operating condi-tions. Block the flow of the condenser air, ifnecessary, to assure a head pressure of280 psig during the charging procedure.

NOTE: The installer should return to the job to verifythe operating charge when the ambient tem-perature is within the conditions shown in Fig-ure 9.

BALANCE POINT SETTING

The balance point of a heat pump is the lowest temper-ature at which the refrigeration system can heat thebuilding without any supplemental resistance heat.

The balance point is dependent upon -

1. The outdoor design temperature,

2. The building heat loss at the outdoor design tem-perature, and

3. The heating capacity of the system at the outdoordesign temperature.

Refer to Form 515.41-AD1 to determine balance point.

Refer to Form 690.63-N1V for details regarding theoutdoor ambient balance point control accessoryModel No. 2BP11700224.

FIGURE 8 - REFRIGERANT FLOW DIAGRAM

035-18549-001-A-0602


START-UP

CRANKCASE HEATER

The crankcase heaters must be energized at least 8hours before starting the compressor. To energize thecrankcase heaters, the main disconnect switch mustbe closed. During this 8 hour period, the system switchon the room thermostat must be “OFF” to prevent thecompressor from starting.

Make sure that the bottom of the compressor is warmto the touch to prove crankcase heater operation.

PRE-START CHECK

Before starting the unit, complete the following checklist:

1. Have sufficient clearances been provided?

2. Has all foreign matter been removed from the inte-rior of the unit (tools, construction or shippingmaterials, etc.)?

3. Have the outdoor fans been rotated manually tocheck for free rotation?

4. Are all wiring connections tight?

5. Does the available power supply agree with thenameplate data on the unit?

6. Have the fuses, disconnect switch and power wirebeen sized properly?

7. Are all compressor hold-down nuts properlysecured?

8. Are any refrigerant lines touching each other or anysheet metal surface? Rubbing due to vibrationcould cause a refrigerant leak.

9. Are there any visible signs of a refrigerant leak,such as oil residue?

10. Is any electrical wire laying against a hot refrigerantline? Keep in mind that this unit has a reverse cycleand that different lines will be hot during the“HEAT” and “COOL” cycles. Only two lines will

FIGURE 9 - CHARGING CURVE EA120 (COOLING MODE)

EA120 Charge Curve

170

190

210

230

250

270

290

310

330

65 70 75 80 85 90

Suction Pressure

Dis

char

ge

Pre

ssu

re

115º Ambient

105º Ambient

95º Ambient

85º Ambient

75º Ambient

Do not attempt to start the compressor withoutat least 8 hours of crankcase heat or compres-sor damage will occur.

035-18549-001-A-0602


remain cool for all cycles - the line between thecompressor and the accumulator and the linebetween the accumulator and the reversing valve.

INITIAL START-UP

1. Supply power to the unit through the disconnectswitch prior to starting the compressor.

2. Move the system switch on the room thermostat tothe “COOL” position, and lower its set point toenergize both the compressor and the reversingvalve. Cool air will be supplied to the conditionedspace.

3. Check the compressor amperage. It should notexceed the RLA rating printed on the unit dataplate or in Table 3 unless the ambient temperatureis above 105°F.

4. Move the system switch on the room thermostat tothe “HEAT” position, and increase the set point ofthe room thermostat until heating is required. Thecompressor will run, but the reversing valve will bede-energized. Warm air will be supplied to the con-ditioned space.

5. Check the operation of the indoor unit per Form515.41-N2.

6. Check the entire system for refrigerant leaks.

7. Check for any abnormal noises and/or vibrations,and make the necessary adjustments to correct(e.g. fan blade touching shroud, refrigerant lineshitting on sheet metal, etc.)

8. After the unit has been operating for several min-utes, shut off the main power supply at the discon-nect switch and inspect all factory wiringconnections and bolted surfaces for tightness.

PHASING

Scroll compressors operate in one direction only. If athree phase scroll compressor is experiencing:

• Low amperage draw

• Similar discharge and suction pressures

• Increased noise level

then the compressor is operating in reverse. To correctthis condition, switch any two (2) line voltage leads atthe contactor. Please note, single phase scroll com-pressors will start and run in one direction only. Thereverse operation is not a concern.

OPERATION

GENERAL

During the cooling cycle, when the reversing valvesolenoid becomes energized, operation will be thesame as any conventional air conditioning system.

During the heating cycle, when the reversing valvesolenoid becomes de-energized, compressor dis-charge gas will be diverted to the indoor coil and theoutdoor coil will become the evaporator.

Refer to Figure 8 for illustration showing the flow ofrefrigerant through a heat pump system.

SYSTEM SEQUENCE OF OPERATION

The following sequences of operation are based onusing the manual changeover thermostat. Refer to therespective unit wiring diagram.

COOLING OPERATION

1. The following controls will be energized throughterminal O on the thermostat to put the system inthe cooling mode.

• Relay RW (460 volt units) and RVS (230 voltunits) and reversing valve solenoid.

2. If the fan switch on the thermostat is in the “ON”position, indoor section blower motor contactor10M will be energized through terminal G to

Units equipped with scroll compressors oper-ate in one direction only.

Incorrect scroll compressor rotation can dam-age or fail the compressor(s).

Reversing valves and check valves are precisemechanical devices and will not tolerate anymechanical abuse such as hammering. If arefrigerant system isn't properly cleaned after acompressor burn-out, scale may build up atthese devices and prevent them from operatingproperly.

035-18549-001-A-0602


provide continuous blower operation. If the switchis in the “AUTO” position, the blower will operateonly when the thermostat calls for coolingoperation.

3. When TC1 of the thermostat closes on a demandfor cooling, a circuit is made from terminal Ythrough the defrost control board and safetyswitches to energize contactor 1M (on 460 voltunits) and relay RY1 to start the compressor. Con-tactor 2M is energized through the NO contacts ofRY1-1 (on 460 volt units) and the NC contacts ofK2 on the defrost control board in order to start theoutdoor fan motors.

4. Relay RY1 also prevents the 10KW portion ofaccessory electric heat referenced as standbyelectric heat from being utilized whenever the com-pressor is in operation. This part of the circuit iscovered under HEATING OPERATION.

5. The thermostat will cycle the unit to satisfy thecooling requirements of the conditioned space.

6. After the unit has shutdown from a cooling cycle ora power interruption, the anti-short cycle feature ofthe defrost control board will not permit the unit torestart for 5 minutes. This feature prevents the unitfrom short cycling.

7. If the discharge pressure reaches 430 psig, the HPcontrol will open and the defrost control board willlock out the compressor. If the discharge tempera-ture reaches 255°F, 2TH thermostat will open andthe defrost control board will lock out the compres-sor. If the suction pressure falls to 7 psig, the lowpressure switch will open and the defrost controlwill lock out the compressor.

8. If the control that caused the lockout has automati-cally reset, the unit can be restarted by one of thefollowing:

a. Turning the system switch on the thermostat to the“OFF” position and back to the “COOLING” position.

b. Increasing the set point on the thermostat above thetemperature in the conditioned space and thenreturning it to its original setting.

Opening and closing the power supply main disconnectswitch.

IN ALL THREE RESET METHODS DESCRIBEDABOVE, A FIVE MINUTE TIME DELAY WILL TAKEPLACE AFTER THE RESET BEFORE THE UNITWILL RESTART.

HEATING OPERATION

1. Reversing valve is de-energized and the systemwill be in the heating mode.

2. If the fan switch on the thermostat is in the “ON”position, indoor section blower motor contactor10M will be energized through terminal G to pro-vide continuous blower operation. If the switch is in“AUTO” position, the blower will operate only whenthermostat calls for heating operation.

3. When the TH1 of the thermostat closes for first-stage heat, a circuit is made from terminal Ythrough the defrost control board and safetyswitches to energize contactor 1M (on 460 voltunits) and RY1 to start the compressor. Contactor2M is energized through the NO contacts of RY1-1(on 460 volt motors) and the NC contacts of K2 onthe defrost control board, which starts the outdoorfan motors.

4. The thermostat will cycle the unit to satisfy theheating requirements of the conditioned space.

5. After the unit has shutdown from a heating cycle ora power interruption, the anti-short cycle feature ofthe defrost control board will not permit the unit torestart for 5 minutes. This feature prevents the unitfrom short cycling.

6. If the discharge pressure reaches 430 psig, the HPcontrol will open and the defrost control board willlock out the compressor. If the discharge tempera-ture reaches 255°F, 2TH thermostat will open andthe defrost control board will lock out the compres-sor. If the suction pressure falls to 7 psig, the lowpressure switch will open and the defrost controlwill lock out the compressor.

7. If the control that caused the lockout has automati-cally reset, the unit can be restarted by one of thefollowing:

a. Turning the system switch on the thermostat tothe “OFF” position and back to the “HEATING”position.

b. Decreasing the set point on the thermostatbelow the temperature in the conditioned spaceand then returning it to its original setting.

c. Opening and closing the power supply main dis-connect switch.

IN ALL THREE RESET METHODS DESCRIBEDABOVE, A FIVE MINUTE TIME DELAY WILL TAKEPLACE AFTER THE RESET BEFORE THE UNITWILL RESTART.

035-18549-001-A-0602


8. Supplemental electric heat (if installed) will be con-trolled by second stage TH2 of the thermostat. Thesupplemental electric heat circuit is controlledthrough low voltage terminals W, 60 and 66. Thestandby portion of electric heat (controlled throughlow voltage terminal 53) cannot operate becauserelay RY1 is energized, opening the circuit to termi-nal 53, whenever the compressor is operating.

9. When second stage heating TH2 is satisfied, thesupplemental heaters will be de-energized.

DEFROST CYCLE

When condensate freezes on the outdoor coil duringheating operation, it must be defrosted before it blocksthe flow of air across the coil.

1. A defrost cycle will be initiated by the defrost con-trol board's timed defrost feature.

2. When the defrost cycle is initiated, the unit oper-ates as follows:

a. The reversing valve solenoid is energized throughthe defrost control board causing the unit to switchto the cooling cycle.

b. Defrost control board de-energizes 2M contactor,causing the outdoor section fan(s) to shut down.

c. Supplemental electric heat (if installed) will be ener-gized through defrost control board. Only that por-tion of electric heat controlled through low voltagecontrol terminal 66 will be energized by the defrostcycle. The operation of supplemental electric heatduring unit defrost will prevent cold drafts in the con-ditioned space.

3. The defrost cycle will be terminated when:

a. the liquid temperature exceeds 55°F, or

b. 10 minutes have passed since defrost initiation.

The 10 minute cycle time (independent of liquid linetemperature) is controlled by the defrost control board.

4. At defrost termination, the unit returns to the nor-mal heating operation.

OPERATION BELOW 0°F OUTDOOR TEMPERATURE

1. At 0°F outdoor temperature, the low temperaturecompressor cutoff thermostat 1TH contacts 1 and 3will open, de-energizing contactor 1M which shutsdown the compressor. Contacts 1 and 2 of thermo-stat 1TH are closed when contacts 1 and 3 are

open. This feature allows the standby electric heat(if installed) to operate under control of first stageheating TH1 of the room thermostat whenever thecompressor is shut-down by the 1TH control. Thesupplemental electric heat will continue to be con-trolled by the second stage TH2 of the room ther-mostat same as described under Item 8 ofHEATING OPERATION.

2. The indoor section blower operation will be con-trolled by the first stage heating TH1 of the roomthermostat if the fan switch is in the “AUTO” posi-tion.

EMERGENCY HEAT OPERATION

When the system switch on the room thermostat isplaced in the EMERGENCY HEAT position, operationis as follows:

1. The emergency heat light on the room thermostatwill be energized.

2. Compressor will not operate because the Y circuitof the room thermostat cannot be energized.

3. Supplemental and standby electric heat (ifinstalled) will be controlled by first stage heatingTH1 of room thermostat.

4. Indoor section blower will also be controlled by firststage heating TH1 if fan switch is in the “AUTO”position.

SAFETY FEATURES

1. All condenser fan motors have inherent protectionwith automatic reset.

2. Every compressor is internally protected againstover current, excessive temperature and primarysingle phasing.

This protection is provided by a line break motorprotector that is mounted inside the compressorhousing and is connected between each windingand the common terminal.

3. Every compressor is protected by crankcase heat-ers to prevent refrigerant from accumulating in thecrankcases of the compressor during an “OFF”cycle.

4. All condenser fan motors and the secondary ofevery transformer is grounded.

035-18549-001-A-0602


SECURE OWNER’S APPROVAL

When the system is functioning properly, secure theowner’s approval. Show him the location of all discon-nect switches and the thermostat. Teach him how tostart and stop the unit, how to adjust temperature set-tings within the limitations of the system, how thedefrost cycle is controlled and how the anti-cycle timeroperates.

MAINTENANCE

CLEANING

Do not allow dirt to accumulate on the outdoor coil.Clean the coil with a brush or vacuum cleaner as oftenas necessary to assure good system performance andefficient operation. If the coil is extremely dirty, it maybe necessary to use an industrial grade detergent anda hose to clean the fin surface.

LUBRICATION

The outdoor fan motors are equipped with factory lubri-cated and sealed ball bearings. They do not requireany maintenance.

REPLACEMENT PARTS

Contact your local UPG Distribution Center for replace-ment compressors, fan motors, controls, etc.

NOTICE TO OWNER

If a lockout occurs, check the indoor filters and the out-door coil before calling a serviceman. If the filters aredirty, clean or replace them. If there is an accumulationof snow, leaves or debris blocking the outdoor air coil,remove the blockage. Reset the thermostat and wait 5minutes. If the unit doesn’t start, call a serviceman.

035-18549-001-A-0602


Subject to change without notice. Printed in U.S.A. 035-18549-001-A-0602

Copyright © by Unitary Products Group 2002. All rights reserved. Supersedes: 035-18549-000-B-0402

Unitary 5005 NormanProducts York OKGroup Drive 73069

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