Carrier 50BK User Manual

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Single-Package Cooling Units

SAFETY CONSIDERATIONS

The 50BJ,BK Single-Package Cooling Units are designed to provide safe and reliable service when operated within design specifications.

However, due to system pressures, electrical components and equipment location, some aspects of installation, start-up and servicing of this equipment can be hazardous.

Only trained, qualified installers and service mechanics should install, start up and service this equipment.

When working on this equipment, observe

all precautions on tags or labels attached to the unit, safety notes in the literature and any other safety precautions that apply.

• Follow all safety codes.

• Wear safety glasses and work gloves.

• Use care in handling, rigging and placing bulky equipment.

A DANGER

NEVER reach into unit while fan is running.

LOCK OPEN AND TAG fan motor power disconnect before working on a fan. Remove the fuses and take them with you after noting this on tag.

A WARNING

CHECK assembly and component weights to be sure rigging equipment can handle them safely. Note also any specific rigging instructions.

WHEN STEAM CLEANING COILS, be sure area is clear of personnel.

Step 4 — Rig and Place Unit with

Accessories ...........................................................2

Step 5 — Position Fan Section As

Desired Step 6 — Install Fan Motor Step 7 — Route Fan Motor Wire Step 8 — Align Fan Shaft and Wheel

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

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

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

______

2 5 6

Step 9 — Install Field-Fabricated

Ductwork ...............................................................8

Step 10 — Check Return Air Filters

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

Step 11 — Check Compressor Spring

Mounts ...................................................................9

Step 12 — Make Condenser

Connections..........................................................9

Step 13 — Install Unit Drain Line

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

Step 14 — Make Electrical

Connections

START-UP

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

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

14,15

General ..................................................................... 14

Prior to Unit Start .................................................... 14

Control Sequence Checkout .................................. 14

SERVICE ...............................................................15-17

Fan Rotation ............................................................ 15

Indoor-Air Fan Adjustment Lubrication Return-Air Filters Condensate Drains Evaporator Coil

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

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

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

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

Water-Cooled Condenser(s)

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

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

16 16 16

Air-Cooled Condensers .......................................... 17

Sight Glasses

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

Charging the System .............................................. 17

Indoor-Air Fan Motor Removal .............................. 17

Pressure Relief Devices ......................................... 17

Crankcase Heaters................................................. 17

High and Low Pressure Switches

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

Time Guard® Control Circuit ................... 17

CONTROL SEQUENCE ........................................... 18

CONTENTS

Page

SAFETY CONSIDERATIONS

INSTALLATION .............................................................1-13

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

General ..............................................................................1

Step 1 — Receive and Inspect Unit

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

Step 2 — Protect Unit From Damage ... 2

Step 3 — Provide Unit Support

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

General — The 50BJ water-cooled condenser type units and the 50BK condenserless units are single package, vertical air conditioning units designed specifically for application with 35B Modubox and 37A Moduline® variable volume air terminals. For air terminal installation and service refer to the separate 35B and 37A installation booklets.

INSTALLATION

Form 50BJ,BK-4SI

Sizes 50BJ,BK016 and unite are shipped with all components assembled, piped and wired. Sizes 50BJ,BK028 and 034 are shipped as follows:

1. Base unit — containing evaporator coil unit, compressors and condensers (50BJ unit only).

2. Fan section.

3. Fan motor and drive. Sizes 50BJ,BK044,054 and 064 are shipped with

all components assembled, piped and wired.

Step 1 — Receive and Inspect Unit

Check unit against shipping order. Inspect care

fully for concealed shipping damage. If shipment is

damaged or incomplete, file claim with transporta

tion company and advise Carrier Corporation

immediately.

Step 2 — Protect Unit From Damage

To maintain warranty, protect unit against ad

verse weather, theft or vandalism on jobsite.

Step 3 — Provide Unit Support

Refer to Fig. 1 — Unit Dimensions, and Table 1 —

Unit Physical Data for unit size and weight. Floor unit loading should be adequate to support unit.

Step 4 — Rig and Place Unit With Accessories

Collect all unit parts together and move them to

actual installation site. Provide space around unit for service, filter access and overhead clearance as indicated in Fig. 1.

Move and store unit in upright position. Do not

remove shipping package or skids until unit is at final position. Follow rigging label instructions to prevent cabinet damage during unit positioning.

DO NOT USE CHAINS. Raise base skid on blocks and remove bolts. Unbolt fan section from skid (028 and 034 units only).

If any 39E accessories (eg. filters) are to be used

on 50BJ,BK044-064 units, refer to latest 39E Installation Instructions. The 50BJ,BK044-064 units do not contain installed filters or racks. Bolts to secure filter rack are shipped secured to base unit compressor basepan.

Units as shipped are adequately dampened

against vibration. If additional dampening is de sired, place sponge rubber, rubber mat or fiberglass roof insulation between floor and base of unit or install vibration isolators.

Step 5 — Position Fan Section As Desired

UNIT SIZES 50BJ,BK0I6 and 024 are shipped for vertical discharge. To set up these units for topmounted horizontal discharge, accessory filler panels must be field installed (see Fig. 1).

To set up unit sizes 50BJ,BK016 and 024 for back-mounted horizontal discharge (Fig. 1), pro ceed as follows:

1. Remove: a. rear fan-section panel. b. upper rear coil-section panel. c. flexible conduit and wires from motor. d. corner bolts holding fan section to coil section.

2. Remove fan section and rotate it 180° lengthwise so that motor is on left side of unit.

3. Place fan section on rear of coil section and refasten.

4. Replace motor wire and conduit.

5. Adjust the following items per Installation Step 8: a. Shaft alignment. b. Fan wheel position. c. Pulleys.

d. Fan belt.

6. Replace panels as follows: a. Upper rear coil-section panel on top of coil

section and fasten.

b. Rear fan-section panel on top of fan section

and fasten.

UNIT SIZES 50BJ,BK028 AND 034 are shipped in sections as noted previously. They can be field assembled for either vertical or horizontal discharge.

NOTE: Fan section panels may be removed for easier lifting and to facilitate motor installation.

To set up sizes 50BJ,BK028 and 034 units for

horizontal discharge (Fig. 2), proceed as follows:

1. Remove: a. Upper rear and end panels of coil section.

b. End panels on fan section. c. Fasteners holding lower rear edge of fan panel.

2. Eift and position fan section on rear of coil section (Fig. 2). Secure with fasteners provided.

3. Install the following per Installation Step 6: a. Motor mounting frame angles. b. Motor on plate assembly.

e. Motor-plate assembly on frame angles. d. Balance of drive package components.

4. Adjust the following per Installation Step 8: a. Shaft alignment.

b. Fan wheel position. c. Pulleys. d. Fan belts.

5. Replace panels as follows:

a. Rear coil section panel on top of coil section.

Rear holes will overlap fan section top panel. Fasten using hole vacated in step Ic (see Fig. 2).

b. All end panels.

-> Table 1 — Unit P

MODEL50

OPERATING WEIGHT (lbs) (Note 1)

016

1420

OPERATING CHARGE (lbs)

System 1

System 2

COMPRESSOR — TYPE 06

System 1 System 2 No. of Unloading Cylinders No. of Capacity Steps HPS Setting (psig) LPS Setting (psig)

DC337 1 DC537

4 3

280 j 376

CONDENSER (BJ Only)

No. ...Type

Max. Working Pressure (psig)

1 SC

550

Connection Size - (in.)

Water Inlet Water Outlet

(1)2 FPT (1)2 FPT

CONDENSER (BKOnly)

Connection Size - (in.)

Liquid Discharge

% ODM (2)5/8 ODM

1У8 ODM

CONDENSATE CONNECTION

Condensate Drain

1 FPT 1 FPT

INDOOR FAN (Note 3)

Number

Size (in.)

Nominal Cfm Maximum Allowable Rpm No of Belts...Fan Pulley PD (in.) (Note 4) Fan Shaft Diameter - (in.)

2 2

15x11 15x11

6,000 8,000

1200 1200

1 90 2 90

1^^

Horsepower

Standard...Frame Size Motor Pulley A Diameter Motor Pulley B Diameter Motor Efficiency (%) Motor Shaft Diameter (in.)

3 182T 4 5-5 5

—

1У8 Center To Center (standard and horizontal) 8 8-11 1 Center To Center (alternate top discharge)

— —

Fan Speed Range (Rpm)

Pulley A

875-1069

Pulley B Alternate...Frame Size Motor Pulley A Diameter Motor Pulley B Diameter Fan Speed Range (Rpm)

Pulley A Pulley B

5 184T

—

— —

___

—

INDOOR COIL

No of Rows... Fins/in. 3 110 Total Face Area (sq ft)

16 3

RETURN AIR FILTERS

No. . .Size (in.)

3 16x25x2 3 20x25x2

Cfm — Cubic Feet Per Minute ODM — Outside Diameter Male FPT — Female Pipe Thread ODS — Outside Diameter Solder Hp — Horsepower PD — Pitch Diameter MPT — Male Pipe Thread PDR — Pitch Diameter Range

BK BJ BK

024

1225 1900 1470

15 17

DC724 1 DC824 DA724 1 DA824

4 6

280 1 376

2 SC

150 (Note 2)

(1)2 5 FPT (1)2 5 FPT

(2)У8 ODM

Р/б V'Ae

5 .184T

4 6-5 6

84 84

1У8 1%

8 8-11 1 29 8-33 3

894-1089 925

—

7 5.213T 10 215T

— —

4 110

17 4

3. 16x25x2 3 20x25x2

Rpm — Revolutions Per Minute NO SC — Shell and Coil TT — Tube-in-Tube

028

2500

DC337 j DC DA724 j da

280 1 3

2 SC

15 + 2 FPT 15 + 2 FPT

(2)% ODM

1У8 ODM

1У4 MPT

18x18

10,000

1100

2 124

7 5 213T

1073

4 90

21 9

6. 25x20x2 2 16x20x2

4 6

550

5 6 6 5

1 1

- Unit Physical Data

034

2610 2440

Refrigerant 22

24 1 15

24 15

lerviceable Hermetic, 1750 Rpn

DC337 1 DC537

DA337

280 376

550

(2)2 (2)2 FPT

Size (in ) Type

(2) Ув ODM

(2) 1 Ув ODM

Size (in

1У4

028

550

5 + 2 FPT 5 + 2 FPT

)Ув

ODM

Ув

ODM

P/4

MPT

2335

15 12

DC537 DA824

376

Adjustable, Belt-Driven Centrifugal; 1750 Rpm Motor

2 2

18x18 18x18

10,000 12,000

1100 1100

2 12 4 2 11 0

I'Me VVu

FPT

) Type

MPT

DA537

3660

30 30

E2150 EA150

(2) 2Ув

(1)ЗУв

(2) Ув

(2) 1 Ув

1У2

BK BJ

044

3155

18 18 35

Е2250

ЕА250 2 4

395

TT 2

400

ODS ODS (1)ЗУв ODS

ODS ODS

FPT

2888 3298 4030

45 18

E7265 EA150 ЕА250

(2) 2Ув

(2) Ув

(2)1з/в

1У2 FPT

054

395

400

20 X 10

16,000

1200

2 187

1'Me

20 X 18

20,000

1200

2 18 7

^"Ae

Е7265

\ 4

TT 2

ODS

ODS ODS (2) 1Ув

^ BJ

_______

40 40

E7175 EF175 EF275

(2) 2Ув

(1)ЗУв

(2) Ув

1У2 FPT

064

3305

18 18

Е7275

395

400

ODS ODS

20 X 18 24,000

1200

2 18 7

1"4б

'5 213T 7 5 213T

5 6 5 6 6 5 6 5

84 84

1 % 1 %

>9 8-33 3 29 8-33 3

925

1073

10 215T

Copper Tubes, Aluminum Plate Fins

4 90 4 90

21 9 26 2

Factory Supplied — Throwaway 25x20x2 6 25x20x2 16x20x2 2 16x20x2

NOTES

1 Operating charge for 50BK units does not include charge for

matching air-cooled condenser or refrigerant connecting piping All 50BK units are shipped with a holding charge Operating charge values are approximate

2 Condenser working pressure is 550 psig if factory installed,

dresser adapters are removed and field-fabricated manifold is

installed

925

1073

10 215T

15 254T

9 0

10 3

17 9-21 1 18 4-22 0

840 961

20 264T

10 9

11 8

1023 1107

3 15 37 5

None

(See Note 5)

20 264T

9 8

10 9

17 9-21 1

18.4-22.0 915

1023

25 284T

10 9

11 8 1032

1117

4 15 4 15 37 5

None None

(See Note 5) (See Note 5)

Motors and drives other than those furnished with units 016-034 must be purchased locally Installation may require field modification

Fan motor pulleys on 50BJ,BK028,034,044,054,064 are fixed pitch type The smaller of the 2 pulleys is factory installed

Refer to 39E Series literature (size 39E32) for accessory

information

25 284T

9 8

10 9

17 0-20 4 17 6-21 5

922

1032

30 286T

10 9 11 8

1029 1114

37 5

OPTIONAL TOP HORIZONTAL DISCHARGE

*For optional top-mounted horizontal discharge, use

accessory filler panel package as shown

DIMENSIONS (ft-in.)

UNIT

50BJ.BK

A 6-8 7- 9V4 B 2-4 2-11V4

D E

G H 1- 4V4

016

6-10'/2

2-0 3-0

11- 2%

024

028 j 034

8- OVe

2-0 3-0

1- 8Vb

1- 8%

1- 7Vs

NOTES: 1 Certified dimension drawings available on request 2 Water and refrigerant connections located on right side of unit.

UNITS 50BJ,BK028 AND 034

UNITS 50BJ,BK004, 054, AND 064

Fig. 1 — Unit Dimensions

UNIT 1

50BJ.BK 1

J K 2-0 L

p 4- 4% 5-41/8

016 1 024 028 1 034

0-1%

M 1 1-8 2-1 Vs IM j

—

4-11'/2

ACCESS AREA

AIRFLOW

0-2%

1-4

3-2V4

7-41/4 5-71/4

NOTES: 1 Certified dimension drawings available on request 2 Water and refrigerant connections for unit sizes

50BJ,BK044 thru 064 are located on right side of

unit See Fig 12 for connection details

3 Filters are not supplied with base unit. All models

are directly compatible with 39E (size 32) air handling unit components Refer to 39E literature for physical data for accessories

To set up sizes 50BJ,BK028 and 034 units for

vertical discharge (Fig. 2):

1. Remove: a. Front, rear and end panels of fan section. b. Upper-rear and end panels of coil section. c. Filters from coil section. d. Fasteners holding filter frame top. Push out

frame away from coil section frame.

2. Lift up and position fan section on coil section (Fig. 2).

3. Fasten fan-section frame to coil-section frame with fasteners provided; then reposition and

refasten the filter frame moved in step Id.

4. Install the following per Installation Step 6: a. Motor mounting frame angles.

b. Motor on motor-plate assembly. c. Motor-plate assembly on frame angles.

d. Balance of drive package components.

5. Adjust the following per Installation Step 8: a. Fan wheel alignment.

b. Shaft alignment. c. Pulleys. d. Fan belts.

6. Replace panels as follows:

a. Rear coil-section panels, front and rear fan-

section panels.

b. All end panels.

Unit sizes 50BJ,BK044,054 and 064 are shipped

with vertical discharge as standard. Other fan posi

tions are available as a factory-installed option. Step 6 — Install Fan Motor. Unit 50BJ,BK028

and 034 only. (All other units have factory-installed motors.) Install items after fan section frame has been placed in position on coil section.

NOTE: Place plywood over evaporator coil to

prevent damage while installing motor and mounts.

To install motor:

1. Fasten motor mounting angle bracket to fan section. Use Fig. 2 or 3 for position reference and Fig. 4 for assembly guidance. Be sure that

lips of angle brackets are around fan section frame and that slots for motor mounting plate face each other.

2. Position motor on motor plate (Fig. 5) and fasten with fasteners provided.

3. Lift motor-plate assembly and slide into motor mounting angles as shown in Fig. 4. Plate fits in

angle slots. On vertical mounts, the motor

mounting assembly can be lowered to bottom of motor support channels.

4. Assemble and install motor adjusting screws as shown in Fig. 6. Drive roll pins into screws to prevent the screws from backing out during motor position adjustment.

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