Carrier 50BK User Manual

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	^^2 Division of
•	Carrier Corporation
	Carrier Parkway • Syracus N Y 13221
			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.

		CONTENTS
			Page
	SAFETY CONSIDERATIONS .......................................		1
#	INSTALLATION .............................................................		1-13
	General ..............................................................................		1
	Step 1	— Receive and Inspect Unit ...........................	2
	Step 2	— Protect Unit From Damage ...	2
	Step 3 — Provide Unit Support ..................................		2

Step 4 — Rig and Place Unit with
Accessories ...........................................................			2
Step 5 — Position Fan Section As
Desired ..................................................................			2
Step 6 — Install Fan Motor ......................................			5
Step 7 — Route Fan Motor Wire .............................			6
Step 8 — Align Fan Shaft and	Wheel______ 6
Step 9 — Install Field-Fabricated
Ductwork ...............................................................			8
Step 10 — Check Return Air Filters .......................			9
Step 11 — Check Compressor Spring
Mounts ...................................................................			9
Step 12 — Make Condenser
Connections..........................................................			9
Step 13 — Install Unit Drain Line ..........................			11
Step 14 — Make Electrical
Connections.......................................................		12
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...................................		15
Lubrication ..............................................................			16
Return-Air Filters ....................................................			16
Condensate Drains .................................................			16
Evaporator Coil......................................................		17
Water-Cooled Condenser(s) ..................................			17
Air-Cooled Condensers ..........................................			17
Sight Glasses ..........................................................			17
Charging the System ..............................................			17
Indoor-Air Fan Motor Removal ..............................			17
Pressure Relief Devices .........................................			17
Crankcase Heaters.................................................		17
High and Low Pressure Switches........................		17
Time Guard® Control Circuit	...................		17
CONTROL SEQUENCE ...........................................			18
INSTALLATION
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.

© Carrier Corporation 1983

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	BJ	BK	BJ	BK	BJ
	016			024		028
OPERATING WEIGHT (lbs) (Note 1)	1420	1225	1900	1470	2500	23
OPERATING CHARGE (lbs)	24	15	17
System 1					24
System 2			17		17
COMPRESSOR — TYPE 06	DC337 1 DC537		DC724 1 DC824
System 1					DC337 j DC
System 2	4		DA724 1 DA824		DA724 j DA
No. of Unloading Cylinders				4		4
No. of Capacity Steps	3			6		6
HPS Setting (psig)	280 j376			280 1 376	280 1 3
LPS Setting (psig)	27			27		27
CONDENSER (BJ Only)	1 SC			2 SC
No. ...Type						2 SC
Max. Working Pressure (psig)	550			150 (Note 2)		550
Connection Size - (in.)	(1)2 FPT			(1)2 5 FPT
Water Inlet						15 + 2 FPT
Water Outlet	(1)2 FPT			(1)2 5 FPT		15 + 2 FPT
CONDENSER (BKOnly)
Connection Size - (in.)	% ODM			(2)5/8 ODM
Liquid						(2)% ODM
Discharge	1У8 ODM			(2)У8 ODM		1У8 ODM
CONDENSATE CONNECTION	1 FPT			1 FPT
Condensate Drain						1У4 MPT
INDOOR FAN (Note 3)	2			2		A
Number						2
Size (in.)	15x11			15x11		18x18
Nominal Cfm	6,000			8,000		10,000
Maximum Allowable Rpm	1200			1200		1100
No of Belts...Fan Pulley PD (in.) (Note 4)	1 90			2 90		2 124
Fan Shaft Diameter - (in.)	1^^			Р/б		V ' A e
Horsepower	3 182T
Standard...Frame Size				5 .184T		7 5 213T
Motor Pulley A Diameter	4 5-5 5			4 6-5 6		5 6
Motor Pulley B Diameter	—					6 5
Motor Efficiency (%)	79			84		84
Motor Shaft Diameter (in.)	1У8			1У8		1%
Center To Center (standard and horizontal)	8 8-11 1			8 8-11 1		29 8-33 3
Center To Center (alternate top discharge)	—			—		__
Fan Speed Range (Rpm)	875-1069
Pulley A				894-1089		925
Pulley B	5 184T			—		1073
Alternate...Frame Size				7 5.213T		10 215T
Motor Pulley A Diameter	—			—		—
Motor Pulley B Diameter	—					—
Fan Speed Range (Rpm)
Pulley A	___
Pulley B	—			—		—
INDOOR COIL
No of Rows... Fins/in.	3 110			4 110		4 90
Total Face Area (sq ft)	16 3			17 4		21 9
RETURN AIR FILTERS	3 16x25x2			3. 16x25x2		6. 25x20x2
No. . .Size (in.)
	3 20x25x2			3 20x25x2		2 16x20x2
Cfm — Cubic Feet Per Minute ODM —	Outside Diameter Male			Rpm — Revolutions Per Minute NO
FPT — Female Pipe Thread ODS —	Outside Diameter Solder			SC — Shell and Coil		1 1
Hp — Horsepower PD —	Pitch Diameter			TT — Tube-in-Tube
MPT — Male Pipe Thread PDR —	Pitch Diameter Range					1
						2.

t

- Unit Physical Data

		BK	BJ	BK	BJ	BK	BJ		BK	^ BJ_______	BK
028			034		044		054			064
	2335		2610	2440	3660	3155	2888		3298	4030	3305
			Refrigerant 22
		15	24 1 15		30	18	45		18	40	18
		12	24	15	30	18	35		18	40	18
		c	lerviceable Hermetic, 1750 Rpn		1
		DC537	DC337 1 DC537		E2150	Е2250	E7265		Е7265	E7175	Е7275
		DA824	DA337	DA537	EA150	ЕА250	EA150		ЕА250	EF175	EF275
	4		4		2		1\			4
			e		4					e
	376		280	376	395		395			395
27			27		27		27			27
2		SC	2	SC	2	TT	2		TT	2	TT
550			550		400		400			400
5 + 2 FPT			(2)2	FPT	(2) 2Ув	ODS	(2) 2Ув		ODS	(2) 2Ув	ODS
5 + 2 FPT			(2)2	FPT	(1)ЗУв	ODS	(1)ЗУв		ODS	(1)ЗУв	ODS
			Size (in ) Type
)Ув		ODM	(2) Ув ODM		(2) Ув	ODS	(2) Ув		ODS	(2) Ув	ODS
Ув		ODM	(2) 1 Ув	ODM	(2) 1 Ув	ODS	(2)1з/в		ODS	(2) 1Ув	ODS
			Size (in ) Type
P/4		MPT	1У4	MPT	1У2	FPT	1У2		FPT	1У2	FPT
		Adjustable, Belt-Driven Centrifugal; 1750 Rpm Motor
	2		2		2		2			2
1 8 x 1 8			1 8 x 1 8		20 X10		20 X 18			20 X18
10,000			12,000		16,000		20,000			24,000
1100			1100		1200		1200			1200
2 12 4			2 11 0		2 187		2 18 7			2 18 7
I'Me			VVu		1'Me		^"Ae			1"4б
' 5 213T			7 5 213T		15	254T	20 264T			25 284T
5 6			5 6		9 0		9 8			9 8
6 5			6 5		10 3		10 9			10 9
84			84		85		87			89
1 %			1 %		1%		1%			1%
>9 8-33 3			29 8-33 3		17 9-21 1		17 9-21 1			17 0-20 4
					18 4-22 0		18.4-22.0			17 6-21 5
925			925		840		915			922
1073			1073		961		1023			1032
10 215T			10 215T		20 264T		25 284T			30 286T
					10 9		10 9			10 9
					11 8		11 8			11 8
					1023		1032			1029
					1107		1117			1114
		Copper Tubes, Aluminum Plate Fins
4 90			4 90		3 15		4 15			4 15
21 9			26 2		37 5		37 5			37 5
			Factory Supplied — Throwaway
25x20x2			6 25x20x2		None		None			None
16x20x2			2 16x20x2		(See Note 5)		(See Note 5)			(See Note 5)

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

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

OPTIONAL TOP HORIZONTAL DISCHARGE

NOTES:

1Certified dimension drawings available on request

2Water and refrigerant connections located on right side of unit.

UNITS 50BJ,BK028 AND 034

*For optional top-mounted horizontal discharge, use accessory filler panel package as shown

DIMENSIONS (ft-in.)

	UNIT		016		024	028 j034
	50BJ.BK
	A		6		-8	7- 9V4
	B		2-4			2-11V4
	C		6-10'/2			8- OVe
	D		2-0			2-0
	E		3-0			3-0
	F		1-	3%		1- 8VB
	G		1-	2%		1- 8%
	H		1-		4V4	1- 7Vs
	UNIT 1		016 1 024			028 1 034
	50BJ.BK 1
	J		0-1%			0-2%
	K		2-0			1-4
	L			—		3-2V4
	M 1		1-8			2-1 Vs
	IM j			—		7-41/4
	p		4- 4%			5-41/8
	Q		4-11'/2			5-71/4

ACCESS AREA

AIRFLOW

0

NOTES:

1Certified dimension drawings available on request

2Water and refrigerant connections for unit sizes 50BJ,BK044 thru 064 are located on right side of unit See Fig 12 for connection details

3Filters 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

UNITS 50BJ,BK004, 054, AND 064

Fig. 1 — Unit Dimensions

ve

2.

3.

4.

5.

6.

4

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 fansection 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	t
	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.