York K4EU120A50A, K5EU090A50A User Manual

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Page 1

CAUTION

THE ENCLOSED INST ALL ATION INSTRUCT I ONS AND ANY APPL ICABLE

LOCAL, STA T E , AND NAT IONAL CODES INCLUDING, BUT NOT LI MITED

TO, BUILDING, ELECTRICAL, AND MECHANICAL CODES.

THIS PRODUCT MUST BE INSTALLED IN STRICT COMPLIANCE WITH

WARNING

OPERATION OF THE PRODUCT COULD CAUSE PERSONAL INJURY OR PROPERTY DAM AGE.

I NCORRECT INSTAL LATION MAY CREATE A CONDITION WHERE THE

SUNLINE™ SPLIT-SYSTEM

EVAPORATOR BLOWERS

(AIR COOLED)

INSTALLATION INSTRUCTION

MODELS K5EU090A50A & K4EU120A50A

Supersedes: Nothing 550.39-N4YI (894)

035-12122

(WORLD 50 HZ)

GENERAL

These completely assembled blower units are manufactured under ISO 9002 Quality System Certification and include a well-insulated cabinet, a DX cooling coil with copper tubes and aluminum fins, an expansion valve, a distributor, throwaway filters, a centrifugal blower, a blower motor, a blower motor contactor, an adjustable belt drive and a small holding charge of Refrigerant-22. Blower motors and adjustable drives are factoryinstalled on all units.

The units are shipped in the vertical position with a vertical air discharge. The blower section can be repositioned as shown in Figure1 for horizontal applications.

REFERENCE

Additional information for the accessories on this equip ment is available in the following instructions:

•

Electric Heater - 550.13-N10.1V

•

Supply Air Plenum - 550.13-N10.2V

•

Return Air Grille - 550.13-N10.3V

•

Base - 550.13-N10.4V

Installer should pay particular attention to the words: NOTE, CAU TION and WARNING. Notes stallation easier. Cautions

are intended to clarify or make the in

are given to prevent equipment damage. Warnings are given to alert installer that personal injury

•

Hot Water & Steam Coil - 550.13-N10.7V

Renewal Parts:

•

Refer to Parts Manual for complete listing of replacement parts on this equipment.

All forms may be ordered from:

Publications Distribution Center Unitary Products Group P.O. Box 1592, York, PA 17405

INSPECTION

As soon as a unit is received, it should be inspected for possible damage during transit. If damage is evident, the extent of the damage should be noted on the carrier's de livery receipt. A separate request for inspection by the

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550.39-N4YI

TABLE OF CONTENTS

General

Reference

Inspection

Nomenclature

................................................................................

............................................................................

......................................................................

INSTALLATION

Limitations

Location

Clearances

Rigging and Handling

Vertical/horizontal Installation

Duct Connections

Refrigerant Mains

Drain Connection

Supply Air Blower Adjustment

Power and Control Wiring

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MAINTENANCE

Filters.................................................................................12

Evaporator Coil..................................................................12

Lubrication.........................................................................12

Drain Pan ..........................................................................12

Belts...................................................................................12

No.

1 Unit Application Data

2 Physical Data

3 Supply Air Blower Motor Pulley Adjustment

4 Blower Performance

5 Accessory Static Resistance (IWG/pA)

6 Electrical Data

7 Blower Motor and Drive Data

No.

1 Unit Suspension Mounting (Horizontal)

2 Vertical and Horizontal Appplication

3 Supply Air Duct Connection

4 Electric Heater Accessory

TABLES

Description Page

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FIGURES

Description Page

................

.....................

.................................

....................................

5 Recommended Drain Piping ................................ 6

6 Typical Motor Mounting Assembly ....................... 7

7 Pressure Drop Across Dry Coil vs Supply Air ...... 7

8 Hole Locations (Pressure Drop Readings)........... 7

9 Unit Dimensions and Clearances.........................10

10 Typical Field Wiring (Cooling only).......................11

PRODUCT NOMENCLATURE

K 4 E U 5 02 A

PRODUCT CATEGORY

= Split-System Evaporator Blowerwith

Motor and Drive

PRODUCT GENERATION

4,5 = Design Level

PRODUCT IDENTIFIER

EU = Evaporator Blower Unit

2 Unitary Products Group

1 0

NOMINAL COOLING

CAPACITY

090 = 90 Mbh (26.36kW) 120 = 120 Mbh (35.13kW)

VOLTAGE CODE

50 = 380/415-3-50

FACTORY INSTALLED HEAT

A = Not Applicable

Page 3

INSTALLATION

carrier's agent should be made in writing. See Local Dis tributor for additional information.

LIMITATIONS

These units must be installed in accordance with applicable na tional, local and municipal safety codes.

If components are to be added to a unit to meet local codes, they are to beinstalled atthe dealer'sand/or the customer's ex pense. Refer to Table 1 for Unit Application Data.

LOCATION

These blower units are not designed for outdoor installation. They must be locatedwithin the building structure, either inside or outside the conditioned space.

These Evaporator Blower sections allow for vertical or horizon tal installation in any area offering proper electrical supply, duct

TABLE 1 - UNIT APPLICATION DATA

They may be installed either with ductwork ormatching plenum

and inlet grille. The unit should be located as close to the condensing unit as

practical and positioned to minimize bends in the refrigerant piping.

Units being installed vertically or horizontally can be set directly

on a floor or platform, or they can be supported by metal or wooden beams.

Units being installed horizontally can be suspended from

above. Four frame to accommodate hanger rods. Knockouts must be re

" (9.5mm) weld nuts are provided in the unit

moved from the unit panels to expose these weld nuts. Refer to Figure 1 for their location and the individual load on each hanger rod.

WARNING: Be careful when attaching the hanger rods. They

must not be allowed to turn or slip.

550.39-N4YI

MODEL

KEU090 380/415-3-50 342 457 2400 / 1.3 3600 / 1.7 68/57(20/14) 95/72(18/22) 40(4.4) 77(25)

KEU120 380/415-3-50 342 457 3200 / 1.5 4800 / 2.3 65/57(20/14) 95/72(18/22) 40(4.4) 77(25)

* Utilization Range “A” in accordance with ARI Standard 110.

Power Supply

Voltage

Variation*

Min. Max. Min. Max. Min. Max. Min. Max.

Supply Air Range

CFM/m

Entering Air Temperature, °F(°C)

Cooling-db/wb Heating-db

and drain connections.

(66.7).

44-7/8 (1140)

(1251) 49-1/4

(35)

1-3/8

(25.7)

Model

KEU090 26

KEU120 26

Center of Gravity

Dimensions, (In./mm)

A B W1 W2 W3 W4 TOTAL

/ 667 23

/ 676 24

/ 603 85 /38.5 93 / 42.2 70 / 32 77 / 34.9 325 / 147.4

/ 613 85 /38.5 93 / 42.2 70 / 32 80 / 36.2 330 / 149.7

Weight Distribution

(lbs/kg)

FIG. 1 - UNIT SUSPENSION MOUNTING (Horizontal)

Unitary Products Group 3

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550.39-N4YI

CLEARANCES

The clearances listed on the unit dimension drawing (Figure 9) are required for the proper service and opera tion of the unit.

RIGGING AND HANDLING

Be careful when moving the unit. Do not remove any packaging until the unit is near its final location.

The packaging consists of a bottom wooden skid that can be lifted with a fork truck from any direction, a card board container that covers the entire unit, and strapping that secures the cardboard container to the bottom of the skid.

These units can be rigged with slings under the bottom skid.

CAUTION: Spreader bars should be used to prevent slings

from crushing the unit panels and frame.

Before rigging any unit, determine its weight from Ta ble 2. Before rigging a unit for horizontal installation, make sure that its weight will be distributed equally.

VERTICAL/HORIZONTAL INSTALLATION

The unit is shipped for vertical installation with a vertical air discharge as shownin Figure 2, but maybe converted for horizontal installation as shown in Figure 2 by interchanging the solid bottom panel and the return air duct flange.

DUCT CONNECTIONS

All ducts should be designed and installed in accordance with applicable national and/or local codes.

Refer to Figure 3 for suggested method of connecting supply air ductwork.

FIG. 3 - SUPPLY AIR DUCT CONNECTION

Ducts should be sized no smaller than the duct flanges on the unit or the accessory electric heater (if used). Ref er to the unit dimensions (Figure 1) and the heater detail (Figure 4) for these sizes.

Use flexible fiber glass or plastic cloth collars or other non-flammable material at the unit duct connections to minimize the transmission of noise and vibration.

Insulate all ductwork running through unconditioned areas to prevent moisture condensation and to provide more economical operation.

The return air duct flange is factory-mounted on the front of the unit, but it can be reversed with the solid bottom panel for hori zontal applications. When the return air grille is used, the duct connection frame is not used.

NOTE: If return air duct is not used, applicable lnstalltion

The field installed air plenum and return air grille accessories should be used in place of ductwork only when a free blow/free return application is practical.

codes may limit the unit to installation only in a single story residence.

(489)

(565)

FIG. 2 - VERTICAL AND HORIZONTAL APPLICATION

4 Unitary Products Group

FIG. 4 - ELECTRIC HEATER ACCESSORY

(25)

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550.39-N4YI

Table 2 - PHYSICAL DATA

Model KEU090 KEU120 Rows Deep 3 3 Rows High 27 32

Evaporator Coil

Centrifugal Blower Wheel Dia. x Width

Blower Motor* Nominal Rating (HP/kW) 1

Filters (4 Req'd)

Weight (Lbs,/kg) Operating 325 / 147 330 / 150

Accessory Weights(Lbs/kg)

*All of these 1450 RPMmotors havea solid base, a 56 frame,inherent protection and permanently lubricated ballbearings. Refer to Table 7 for additional motor anddrive

data.

NOTE: Refer to the appropriate condensing unit installation instruction for charging data.

Finned Length (in./mm) 46 / 1168 46 / 1168 Fin/Inch 13 13 Tube O.D. (in./mm) Face Area (Ft

Size

Face Area (Ft.

Electric Heaters

Supply Air Plenum 102 / 46 102 / 46 Base 60 / 27 60 / 27 Return Air Grille 15 / 6.8 15 / 6.8 Hot Water Coil 105 / 48 117 / 53

.2/m2

) 8.6 / 0.80 10.2 / 0.95

inches 15 x15 15 x 15

mm 381 x 381 381 x 381

inches 16 x 25 x 1 16 x 25 x 1

2/m2

) 11.1 / 1.03 11.1 / 1.03

mm 406 x 635 x 25 406 x 635 x 25

10 kW 63 / 28.6 63 / 28.6 16kW 66 / 30 66 / 30 26kW 71/32 71/32 36 kW 74 / 33.6 74 / 33.6

/ 9.5

/ 1.12 2 / 1.5

/ 9.5

REFRIGERANT MAINS

Many service problems can be avoided by taking adequate precautions to provide an internally clean and dry system, and by using procedures and materials that conform with established standards.

Hard drawn copper tubing should be used where no apprecia ble amount of bending around pipes or other obstructions in necessary. Use long radius ells wherever possible. If soft cop per is used, care should be taken to avoid sharp bends which may cause a restriction.

Pack fiber glass insulation and a sealing material such as Per magum around refrigerant lines where they penetrate a wall to reduce vibration and to retain some flexibility.

Support all refrigerant lines at minimum intervals (8 ft./2.4m) with suitable hangers, brackets or clamps.

Braze all copper to copper joints witH Sil-Fos 5 or equivalent brazing material. Do not use soft solder.

Never braze or solder liquid and suction lines together. The complete suction line should be insulated with no less the

(12mm) ARMAFLEX or equivalent. If the liquid line is installed in warm space, it must be insulated.

If it is desirable to tape or wire the liquid and suction lines to gether for support purposes, they must be completely insulated from each other.

INSTALLING REFRIGERANT MAINS

The units are evacuated and dehydrated at the factory and shipped with a holding charge (1 lb./2.2kg) of Refrigerant-22. The suction and liquid connections are sealed with copper disks.

WARNING: Provisions for recovering refrigerant releases

must be available during all phases of installation, leak testing and charging. Do NOT release refrigerant into theatmosphere. ASchrader valve is provided for refrigerant recovery.

If the unit has already lost its holding charge, it should be leak

tested and the necessary repairs should be made. If the unit has maintained its holding charge, you can assume that it has

no leaks and proceed with the installation.

Make sure the refrigerant in the lines has been recovered, then drill a small hole through the discs to prevent any internal pres

sure from blowing them off and to allow the flow of dry nitrogen through the connections when unbrazing the closures.

NOTE: To minimize the possibility of system failure due to dirt

and moisture, a filter-drier must be installed in each liquid line as close to the evaporator as possible. Filter-driers are not supplied with theevaporator blow ers. They are supplied with the matching condensing

sections.

The temperature required to make or break a brazed joint is sufficiently high to cause oxidation of the copper

unless an inert atmosphere is provide.

CAUTION: Dry nitrogen should flow through a brazed joint at

all times when heat is being applied and until the joint has cooled.

The liquid, suction and drain connections inside the unit must be piped to the outside. Refer to Unit Dimensions for locations and dimensions of these connection.

Unitary Products Group 5

Page 6

550.39-N4YI

Before brazing the refrigerantlines tothese connections, remove the short panel from the unit frame and slide it (along with the grommets) onto the refrigerant lines. Af ter the brazed joints have cooled, slide the panel back into place and secure it to the unit frame.

NOTE: These units can only be piped from one side of

the unit.

EXPANSION VALVE BULB

On KEU090 units the expansion valve bulb must be fas tened in a 4o'clock positionto thesuction lineoutside the cabinet after the piping connections have been made.

On KEU120 units fasten the expansion valve bulb on the suction header 8" (203mm) below the top of the header and adjacent to the coil.

Use the clamps provided with the valve to secure the bulb in position.

DRAIN CONNECTION

The drain line MUST be trapped because the coil is lo cated on the negative side of the supply air blower. It must also be protected from freezing temperatures.

" (22.2mm) OD stub connection is provided within

the cabinet on both ends of the condensate drain pan for either left hand or right hand piping connections. Refer to Figure 5 for recommended drain piping.

The drain line is located on the same end of the coil section as the refrigerant connections. The line should be insulated where moisture drippage will be objectionable or cause damage to the area. Seal the unused drain connection with a suitable mastic.

NOTE: Refer to Figure 9 for minimum clearance require

ments.

SUPPLY AIR BLOWER ADJUSTMENT

The RPM of the supply air blower will depend on the re quired airflow, the unit accessories and the static resis tances of both the supply and the return air duct systems. With this information, the RPM for the supply air blower can be determined from the blower perform ance in Table 4.

Knowing the required blower RPM and the blower motor HP, the setting (turns open) for the supply air motor pulley can be determined from Table 3.

Each motor pulley has:

1. A threaded barrel with two flats (or notched recesses) 180 degrees apart.

2. A movable flange with one set screw.

After the movable flange has been rotated to the proper number of “turns open”, the set screw should be tight ened against the flat on the barrel to lock the movable

flange in place. If the pulley includes a locking collar, the

locking collar must be loosened to adjust the setting of the movable flange.

Note the following:

1. The supply airflow must be within the limitations shown in Table 1.

2. All pulleys can be adjusted in half-turn increments.

3. The tension on the belt should be adjusted for a deflection

" (5mm) per foot (305mm) of belt span with an applied

force of approximately 3 lbs (1.4kg). This adjustment is made by moving the blower motor mounting plate. Refer to Figure 6. Turning the adjustment bolt (B) moves the motor mounting plate up or down. Note - Never loosen the two nuts (C). Four hex nuts (A) have to be loosed to move the mounting plate and retightened after the mounting plate has been moved to the proper position.

4. All pulleys are factory aligned.

5. All supply air motor pulleys are factory set at three “turns

(76)

open.”

After the supply air blower motor is operating, adjust the

(64)

resistances in both the supply and the return duct sys tems to balance the air distribution throughout the condi tioned space. The job specifications may require that this balancing be done by someone otherthan theequip ment installer.

FIG. 5 - RECOMMENDED DRAIN PIPING

The 3" (76mm) dimension must equal or exceed the negative static pressure developed by the supply air blower. If it does not, condensate will not drain properly and may overflow the drainpan. The trap mustbe atleast

" (63mm) deep to maintain a water seal under all oper

ating conditions, especially during blower start-up.

6 Unitary Products Group

To check the supply air airflow after the the initial balancing has been completed:

1. Drill two holes Figure 8.

2. Insert at least 8" (200mm) of

each of these holes for sufficient penetration into the air flow on both sides of the evaporator coil.

NOTE: The tubes must be inserted and held in a position per

pendicular to the air flow so that velocity pressure will not affect the static pressure reading.

" (8mm) dia. in the side panel as shown in

" (6.3mm) O.D. tubing into

Page 7

3. Using an inclined manometer, determine the pressure drop across a dry evaporator coil. Since the moisture on an evaporator coil may vary greatly, measuring the pressure drop across a wet coil under field conditions would be inac curate. To assure a dry coil, the refrigerant system should be de-energized while the test is being run.

After readings have been obtained, remove the tubes and seal up the drilled holes in the side panel with plugs (P/N 029-13880) available through normal parts ordering procedure.

" (8mm) dia. dot

550.39-N4YI

4. Knowing the pressure drop across a dry coil, the actual air flow through the unit can be determined from the curve in Figure 7.

If the airflow is above or below the specified valve, the supply air motor pulley may have to be readjusted. After one hour of operation, check the belt and pulleys for tightness and align ment.

WARNING: Failure to properly adjust the total system air quan

tity can result in extensive blower damage.

TABLE 3 - SUPPLY AIR BLOWER MOTOR PULLEY

ADJUSTMENT

BLOWER DRIVE RANGE (RPM)

TURNS OPEN*

5 650 700 4 690 740 3 730 780 2 770 830 1 810 870 0 850 910

* Pulleys can be adjusted in half-turn increments.

KEU090 KEU120

650 -850 700 - 910

FIG. 7 - PRESSURE DROP ACROSS A DRY

EVAPORATOR COIL VS SUPPLY AIR CFM

DIMENSIONS (in./mm)

ABCD

3/76 3/76 14/356 12/305

NOTE: DE-ENERGIZE THE REFRIGERANT SYSTEM BEF

ORE TAKING ANY TEST MEASUREMENTS TO AS SURE A DRY EVAPORATOR COIL.

FIG. 8 - HOLE LOCATIONS

FIG 6 - TYPICAL MOTOR MOUNTING ASSEMBLY

Unitary Products Group 7

(PRESSURE DROP READINGS)

Page 8

550.39-N4YI

TABLE 4 - BLOWER PERFORMANCE

KEU090 - SUPPLY AIR BLOWER PERFORMANCE

BLOWER

SPEED

RPM

ESP

(IWG)

OUTPUT

(BHP)

INPUT

(kW)

ESP

(IWG)

OUTPUT

(BHP)

- (CFM)

INPUT

(KW)

ESP2 (IWG)

AIRFLOW

OUTPUT

(BHP)

INPUT

(kW)

ESP

(IWG)

OUTPUT

(BHP)

INPUT

(kW)

ESP

(IWG)

OUTPUT

(BHP)

INPUT

(kW

2400 CFM 2700 CFM 3000 CFM 3300 CFM 3600CFM 600 0.35 0.62 0.59 0.26 0.70 0.66 0.13 0.78 0.73 -----655 0.49 0.70 0.66 0.41 0.78 0.72 0.30 0.87 0.82 0.07 0.96 0.90 - - 700 0.60 0.77 0.73 053 0.85 0.80 043 0.95 0.89 0.29 1.06 0.99 0.12 1.17 1.09 800 0.92 0.97 0.90 0.85 1.06 0.99 0.77 1.18 1.10 0.65 1.30 1.21 0.49 1.42 1.32 880 1.18 1.11 1.04 1.11 1.24 1.16 1.03 1.37 1.28 0.91 1.50 1.38 0.77 1.64 1.53 900 1.24 1.15 1.07 1.18 1.28 1.19 1.10 1.42 1.32 0.98 1.55 1.43 0.84- 1.70 1.57

1000 1.58 1.35 1.26 1.53 1.48 1.38 1.46 1.63 1.48 1.37 1.81 1.65 1.24 2.02 1.85

OUTPUT

(kW)

-(m3/s)

INPUT

(kW)

ESP

(Pa)

AIRFLOW

OUTPUT

(kW)

INPUT

(kW)

ESP

(Pa)

OUTPUT

(kW)

INPUT

(kW)

ESP

(Pa)

OUTPUT

(kW)

INPUT

(kW)

KEU090 - SUPPLY AIR BLOWER PERFORMANCE

BLOWER

SPEED

RPM

ESP

(Pa)

OUTPUT

1.1 m

INPUT

(kW)

/s 1.3 m3/s 1.4 m3/s 1.6 m3/s 1.7 m3/s

ESP

(Pa)

600 87 0.46 0.59 64 0.52 0.66 32 0.45 0.73 -----655 122 0.52 0.66 102 0.58 0.72 74 0.65 0.82 17 0.72 0.90 - - 700 149 0.57 0.73 131 0.63 0.80 107 0.71 0.89 72 0.79 0.99 30 0.87 1.09 800 228 0.72 0.90 211 0.79 0.99 191 0.88 1.10 161 0.97 1.21 122 1.06 1.32 880 293 0.83 1.04 275 0.92 1.16 255 1.02 1.28 226 1.12 1.38 191 1.22 1.53 900 308 0.86 1.07 293 0.95 1.19 273 1.06 1.32 243 1.15 1.43 208 1.27 1.57

1000 392 1.01 1.26 379 1.10 1.38 362 1.21 1.48 340 1.35 1.65 308 1.50 1.85

KEU120- SUPPLY AIR BLOWER PERFORMANCE1(CFM)

BLOWE

SPEED

RPM

ESP

(IWG)

OUTPUT

(BHP)

INPUT

(kW)

ESP

(IWG)

OUTPUT

(BHP)

INPUT

(kW)

3200 3600 4000 4400 4800

ESP

(IWG)

AIRFLOW

OUTPUT

(BHP)

INPUT

(kW)

ESP

(IWG)

OUTPUT

(BHP)

INPUT

(kW)

ESP

(IWG)

OUTPUT

(BHP)

INPUT

(kW)

700 0.49 1.01 0.94 0.34 1.17 1.09 0.14 1.33 1.24 -----800 0.84 1.25 1.16 0.71 1.42 1.32 0.53 1.60 1.48 0.30 1.80 1.64 - - 900 1.18 1.48 1.38 1.06 1.70 1.57 0.91 1.92 1.75 0.70 2.18 1.99 0.43 2.45 2.24 950 1.37 1.61 1.50 1.26 1.86 1.71 1.11 2.12 1.95 0.90 2.39 2.18 0.65 2.67 2.44

1000 1.56 1.75 1.62 1.46 2.02 1.85 1.32 2.30 2.10 1.13 2.60 2.38 0.87 2.90 2.65

(kW)

1(m3

INPUT

(kW)

/s)

ESP

(Pa)

AIRFLOW

OUTPUT

(kW)

INPUT

(kW)

ESP

(Pa)

OUTPUT

(kW)

INPUT

(kW)

ESP

(Pa)

OUTPUT

(kW)

INPUT

(kW)

KEU120 - SUPPPLY AIR BLOWER PERFORMANCE

BLOWE

SPEED

RPM

ESP

(Pa)

OUTPUT

1.5 m

INPUT

(kW)

/s 1.7m3/s 1.9 m3/s 2.0 m3/s 2.3 m3/s

ESP

(Pa)

OUTPUT

700 122 0.75 0.94 84 0.87 1.09 35 0.99 1.24 -----800 208 0.93 1.16 176 1.05 1.32 131 1.19 1.48 74 1034 1.64 - - 900 293 1.10 1.38 263 1.27 1.57 226 1.43 1.75 174 1.62 1.99 107 1.83 2.24 950 340 1.20 1.50 312 1.39 1.71 275 1.58 1.95 223 1.78 2.18 161 1.99 2.44

1000 387 1.30 1.62 362 1.50 1.85 327 1.71 2.10 280 1.94 2.38 216 2.16 2.65

Unit resistance is based on a wet evaporator coil and clean filters.

Available static pressure in IWG (Pa) to overcome the resistance of the duct system and any accessories added to the unit. Refer to Table 6 for the resistance of these

accessories and to Table 7 for additional motor and drive data

NOTE: Motors can be selected to operate into the service factor because they are located in the moving air stream, upstream of any heating device.

LEGEND:

RPM range for the standard factory-mounted drive com ponents.

Exceeds the BHP limitation of the standard

factory-mounted blower motor

8 Unitary Products Group

Page 9

TABLE 5 - ACCESSORY STATIC RESISTANCE (IWG)

KEU090

ACCESSORY

BLOWER CFM/m

10k W 0.01 / 2.5 0.01 / 2.5 0.01/ 2.5 0.02 / 5.0 0.02/ 5.0

Electric

Heat

16 kW 0.01 / 2.5 0.02 / 5.0 0.02 / 5.0 0.03 / 7.4 0.04/ 10.0

26 kW 0.03 / 7.4 0.4/ 10.0 0.05 / 12.4 0.06/ 15.0 0.07 / 17.4

36 kW 0.05 / 12.4 0.07 / 17.4 0.08 / 20.0 0.10 / 25.0 0.11 / 27.0

Supply Air Plenum 0.03 / 7.4 0.03 / 7.4 0.04 / 10.0 0.05 / 12.4 0.06 / 15.0

Return Air Grille 0.02 / 5.0 0.03 / 7.4 0.04 / 10.0 0.05 / 12.4 0.06 / 15.0

Add these pressures to the ESP values in the respective blower performance table.

EXTERNAL STATIC PRESSURE DROP RESISTANCE

/s 2400 / 1.1 2700 / 1.3 3000 / 1.4 3300 / 1.6 3600 / 1.7

KEU120

550.39-N4YI

IWG/pA

ACCESSORY

BLOWER CFM/m

EXTERNAL STATIC PRESSURE DROP RESISTANCE

IWG/pA

/s 3200 / 1.5 3600 / 1.7 4000 / 1.9 4400 / 2.1 4800 / 2.3

10 kW 0.02 / 5.0 0.02 / 5.0 0.03 / 7.4 0.03 / 7.4 0.04 / 10.0

Electric

Heat

16 kW 0.03 / 7.4 0.04 / 10.0 0.05 / 12.4 0.06 / 15.0 0.07 / 17.4

26 kW 0.06 / 15.0 0.07 / 17.4 0.09 / 22.3 0.11 / 27.0 0.13 / 32.2

36 kW 0.09 / 22.3 0.11 / 27.0 0.14 / 35.0 0.17 / 42.2 0.20 / 50.0

Supply Air Plenum 0.05 / 12.4 0.06 / 15.0 0.07 / 17.4 0.08 / 20.0 0.10 / 25.0

Return Air Grille 0.05 / 12.4 0.06 / 15.0 0.07 / 17.4 0.08 / 20.0 0.10 / 25.0

Add these pressures to the ESP values in the respective blower performance table.

TABLE 6 - ELECTRICAL DATA

Model

KEU090 1

Blower Motor

HP/kW

/1.1 380/415-3-50 3.7 5 650 / 197

Power Supply FLA

KEU120 2 / 1.5 380/415-3-50 4.5 5 500 / 152

* Dual element, time delay fuses.

** Based on three 60° C, 14 AWG, insulated copper conductors in steel conduit and a 3% voltage drop.

Maximum

Fuse Size* Amps

Maximum

Wire Length* * Ft.(m)

Unitary Products Group 9

Page 10

550.39-N4YI

ACCESSORIES

•ELECTRIC HEATER Add 15" (381mm) to Unit Height when using 10, 16, 26 or 36kW Heater

•SUPPLY AIR PLENUM Add 27" (686mm) to Unit Height when used

•BASE Add 24" (610mm) to Unit Height when used

MINIMUM CLEARANCES (in./mm)

Side with RETURN AIR opening - 24 / 610 Side with SUPPLY AIR opening - 24 / 610 Side with PIPING CONNECTIONS - 61 / 1549 Side opposite PIPING CONNECTIONS - 26 / 66 Bottom -

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FIG 9 - UNIT DIMENSIONS AND CLEARANCES

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Overall dimension of the unit will vary if an electric heater, a supply

air plenum or a base is used.

This dimension is required for removal of the DX coil. Only 26" is required for normal servicing.

If the DX coil has to be removed, this dimension is required to loosen screws that secure the coil to the unit frame. This dimension will also be required for blower motor access if the piping connections are made on the opposite side of the unit.

Allow enough clearance to trap the condensate drain line.

All dimensions are in millimeters and inches. They are subject to change without notice. Certified dimensions will be provided upon request.

10 Unitary Products Group

Page 11

TABLE 7 - BLOWER MOTOR AND DRIVE DATA

Model

KEU090

Motor

(HP/kW)*

/ 1.1

Blower Range

(RPM)

650/850

KEU120 2 / 1.5 700/910

*All motorsare 1450 RPMand have a56 frame, inherentprotection and permanently lubricated ball bearingsThe motorshave a solidbase and a1.15 serv ice factor. All 3-phase motors are wired for 380/415V power supply.

Adjustable Motor Pulley Fixed Blower Pulley Belt

Pitch Dia

(In./mm)

3.4 - 4.4 / 86-112

Bore

(In./mm)

/ 22.2

Pich Dia.

(In./mm)

Bore

(In./mm)

Designa

tion

7.5 / 190 1 / 25 A37 38.3 / 973

7.0 / 178 1 / 25 A37 38.3 / 973

Pitch Lg.

(In./mm)

550.39-N4YI

MOTOR SPECIFICA

TIONS

•1450 RPM

•380/415-3-50

•Solid base

•56 Frame

•Inherently protected

Permanently lubricated

ball bearings

POWER AND CONTROL WIRING

Install electrical wiring in accordance with applicable national, local and municipal codes. The unit should be grounded in ac cordance with these codes.

Remove the 1 Route the power wiring conduit through this opening. Connect the conduit to the required field-supplied fitting and the power wiring to blower motor contactor 10M in unit control box.

If the unit includes an electric heat accessory, route the power wires into heater control box instead of the unit. Refer to the electric heat instructions for additional installation information.

" (35mm) knockout from the unit rear panel.

4 - WIRE

CONTROL WIRING

Route the low voltage control wiring through the hole (with bushing) in the units rear panel. Add

duit fitting to the control wiring through thisopening and connect them to the ter

" (22.2mm) hole in the unit control box, route

minals on block 4TB. Refer to Table 6 to size the disconnect switch, the power wiring

and the fuses. Refer to Figure 10 for typical field wiring.

NOTE: Three phase motor rotation may be incorrect when the

unit is first started up. Reverse phase (leads L1 and L2) at contactor to obtain the correct rotation.

LUG ON NEUTRAL TERMINAL BLOCK

" (25mm) con

" (22.2mm)

TERMINALS ON 1-STAGE COOLING THERMOSTAT 2TH0870124

TERMINALS ON BLOCK 3TB OF THE BLOWER UNIT

FIG. 10 - TYPICAL FIELD WIRING (Cooling only)

Unitary Products Group 11

Page 12

MAINTENANCE

FILTERS — The filters must bereplaced as oftenas necessary

to assure good air flow and filtering action.

Refer to the unit dimension detail (Figure 9) for the location of the filter access panel.

EVAPORATOR COIL — Do not allow dirt to accumulate on the evaporator coil or other parts of the evaporator air circuit.Clean as often as necessary to assure good system performance. Use a brush, vacuum cleaner attachment or other suitable means.

LUBRICATION — The bearings for the blower shaft and the blower motors are permanently lubricated and should not require additional lubricant.

DRAIN PAN — The drain pan should be inspected regu larly to assure proper drainage.

BELTS — Maintain belt tension to extend belt life. Re place when signs of failure begin to appear.

550.39-N4YI

York K4EU120A50A, K5EU090A50A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual