Carrier 50BA User Manual
Number One
AirConditbning
M^er
Division of
Carrier Corporation
CaTiier Parkway • Syracuse N Y 13221
Single-Package Cooling Units
SAFETY CONSIDERATIONS
The 50BA,BB 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 the equipment, observe all pre
cautions 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 dis
connect before working on a fan. Remove the fuses
and take them with you after noting this on tag.
Page
Step 11 — Install return air ductwork
Step 12 — Check return-air filters
Step 13 — Check compressor spring
Step 14 — Make condenser
Step 15
Step 16
START-UP...............................................
Unit Size 50BA,BB004 and 006 ...
Unit Size 50BA,BB008 thru 064 ...
Service Valves........................................
Capacity Control Valve Adjustment
SERVICE
Indoor Air Fan Adjustment
Lubrication
Return-Air Filters
Condensate Drains ................................................. 20
Evaporator Coil
Water-Cooled Condenser...................................... 20
Air-Cooled Condenser........................................... 20
Charging the System
Return-Air Grille Removal
Access Panel Removal.......................................... 22
Indoor-Air Fan Motor Removal............................. 22
Pressure Relief Devices........................................ 22
Crankcase Heaters
High and Low Pressurestats
Time Guard® Control Circuit
(004-012 units).................................... II
mounts
connections.....................................11,14
Install unit drain line
Make electrical connections. ... 16-18
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11
11
15
18
18
18
18
18
19
19
20
20
20
20,21
21
22
22
22
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 .......................................................1-18
General ...................................................................... 1
Step 1 — Receive and inspect unit
Step 2 — Protect units from damage
Step 3 — Provide unit support
Step 4 — Rig and place unit
Step 5 — Install accessory plenum,
Step 6 — Position fan section as desired. .. 7,8
if supplied
Step 7 — Install fan motor.................................. 9
Step 8 — Align fan shaft and wheel
Step 9 — Install heating coil, if supplied. .. 11
Step 10 — Install supply air (evaporator)
ductwork
.......................................
........................................
...................
...............
..........................
..............................
7
..........
10,11
11
I
1
4
4
INSTALLATION
General — The 50BA,BB004 thru 024 units are self-
contained units arranged for vertical air discharge
and wired and piped at the factory.
Size 50BA,BB028 thru 064 units are self-
contained units consisting of a base section, fan
section, fan motor and fan drive package, each
shipped separately and field assembled. The base
section consists of factory-wired compressor/
evaporator coil unit. The fan section can be
mounted for vertical or horizontal air discharge
(Fig. 1).
^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 immediately.
>■ Step 2 — Protect units from damage.
To maintain warranty, protect unit against ad
verse weather, theft or vandalism on jobsite.
Carrier Corporation 1981
--M ----
-v^
ALT REAR INLET
VIEW A-A
UNITS 50BA,BB004,006,008 AND 012«
UNIT
50BA.BB
A
B
C
D
E
F 1-1-13/16
G
H —
J
K 1- 9 1/8
L 2- 9-5/8
M 2- 7-7/8
N
P
Q
NOTES
Certified dimension drawings available upon request
1
Minimum required clearance at back and right side of
2
unit is zero Clearance above and at left of unit depends
on space required for accessory plenum, ductwork, con
denser piping, accessory heater piping, condensate drain
line power wiring, and access to unit control center
Clearance required at front of unit for service access and
free return airflow is 2 feet
Water and refrigerant connections for Unit Sizes 50BA,
BB004 thru 01 2 are located on the left side of unit See
Fig 1 6 for connection details
DIMENSIONS (ft-in )
004
3- 2-5/16
1-10-7/8
1 5- 3-7/8
See Note 2
1- 4-7/16
1-1-1/8
1-0-1/2 0-10-5/8
0- 2
0-10
1- 3-9/16 1-4
006
1-3
0 3/4
008,
012
4-0
2- 6-1/8
6-5
1-0
2-0
1- 7-3/8
1- 5-1/4
0- 1-1/4
0-11-7/8
1-11-1/4
2- 5-3/8
3-6
0-3
1- 0-1/2
i
ELOOR
-v^
*ALTERNATE RETURN AIR OR
OUTDOOR AIR INLET
UNITS 50BA,BB016 AND 024
OPTIONAL TOP HORIZONTAL DISCHARGE
(D
ACCESS AREA
AIRFLOW
0
‘For optional top-mounted horizontal discharge, use
accessory filler panel package as shown See instal
lation instructions in filler panel package
■Fig. 1 — Unit Dimensions
2
UNITS 50BA,BB028,034 AND 044
NOTES
1 Certified dimension drawings available on
request
2 Water and refrigerant connections for Unit Sizes
50BA,BB016 thru 064 are located on right side of
unit See Fig 1 6 for connection details
UNITS 50BA,BB054 AND 064
ACCESS AREA
AIRFLOW
[)
DIMENSIONS (ft-in
'■ ——
^10- g^3/g'
8- 0-1/8 8-10
2-0 2- 0
1-0
1- 8-7/8 1- 8-7/8
1- 8-7/8 1- 8-7/8
0- 2-3/a
3- 2-1/4
2- 1-1/8
7- 4-1/4 10- 0
'”o-3
2- 2-1/2
6- 4-5/8
. .. ...
- —-
054 064
1_-
3-10-1/4 3-10-1/4
9-9 10-1
3-0 3-0
3-0
3-10 4-9 4-9
1-0 3-0”
1- 8-7/8 1- 8-7/8
1- 8-7/8 1- 8-7/8
1- 5-5/8 1- 5-5/8
^ 0-3"^ 0-3
2- 2-1/2 2- 6-1/8
io-0 ^To-0
6- 4-5/8
UNIT
50BA.BB
A
B
C
D
E ~
F
G 1- 5-1/4
H
J
K
L
M
N
P
— ..—
016,024 028,034 044
" 6-8 7- 9-1/4
2- 5-1/4 2-11-1/4 3-10-1/4
6-10-1/2
2-0
. 3_Q
1- 7-1/4
1- 4-1/8 1- 7-7/8 2- 7-1/2
0- 1-5/8
1-7 1-4 2- 2-5/8 1- 2-1/4 1- 2-1/4
—
1-8
—
4- 4-5/8 5- 4-1/8
Q 4-1 1-1/2 5- 7-1/4 6- 3-5/8 7- 7-1/4 7- 7-1/4
"lol el/s'
6- 4-5/8
■Fig. 1 — Unit Dinrensions (cont)
3
Table 1 — Physical Data
MODEL 50
OPERATING WEIGHT (lbs)
Base Unit
Discharge Plenum
OPERATING CHARGE (lbs) Refrigerant 22
System 1
System 2
System 3
COMPRESSOR — TYPE 06
System 1
System 2
System 3
No of Unloading Cylinders
No of Capacity Steps
CONDENSER (BA Only)
No. . Type
INDOOR FAN
Nominal Cfm
Standard Fan Speed Range (Rpm)
Maximum Allowable Rpm 1100 1100
No. of Belts . Fan Pulley PD (in )
Motor Pulley PDR (in )
Nom Hp Std...Frame Size 1/3 48
INDOOR COIL
No of Rows . Fins/in
Total Face Area (sq ft)
RETURN AIR FILTERS
No. ...Size (in.)
CONDENSER CONNECTIONS (BA Only)
Water Inlet — Manifolded
Water Outlet — Manifolded
REFRIGERANT CONNECTIONS (BB Only)
„ ^ - Hot Gas Line
System 1 Liquid Line
_ _ Hot Gas Line
System 2 Liquid Line
_ ^ _ Hot Gas Line
Systems Liquid Line
CONDENSATE CONNECTION
Condensate Drain
ACCESSORY HEATING COIL
Hot Water t , r- a /
„ Rows...Fins/in
HEATING COILS CONNECTIONS
Alt...Frame Size
Alt.. Frame Size
Rows ..Fins/in
Total Face Area (sq ft)
Total Face Area (sq ft)
Inlet
Hot Water r\ ^
Outlet
Outlet
BA BB
004
390 330 427
25
3 5
— —
—
Welded Hermetic, 3450 Rpm
M34 M34
—
— — —
0 0 0
1
1
TT
1200 2000
512-782
1 64
1 9-2 9 2 4-3 4
3/4 56 1
2
13 9
50
FPT 3/4
1/2
1/2 FPT 3/4 FPT
1/2 FI 1/2 FI
1/2 FI 1/2 FI
_
FPT 3/4
3/4
1
1~5
5 0 50
—
— —
1 7/8
1
7/8
1
7/8
1
7/8
2
—
—
2 16x25x1
BA
BB BA
006 008
360
25 140
46
—
—
P53
— — — — — —
1
TT
Adjustable, Belt-Driven Centrifugal; 1750 Rpm Motor
647-915
1
64
3/4 56
56
3 13 9
50
....... i
FPT
FPT
1
1 5
—
1
7/8
1
7/8 1
1
7/8 1
1
7/8
770
2 5 10
__
P67 P77
__
— —
—
— — — —
Copper Tubes, Aluminum Fins
Factory-Supplied Throwaway Type
......
BB
710
7
—
DA818
1
1 TT
3000
495-700 600-850
1100
1 8 5
2 4-3 4 2 4-3 4
1
56
145T
2
182T
3
3 12 1
7 3 8 5
4 16x20x1
.
Size (in ) . Type
1
1 FPT
Size (in.)...Type
3/4
5/8 ODF 5/8
3/4 FPT 3/4
2 14
1
No
1 1-1/4
1
(See Note 4)
FPT
ODF
_
—
—
—
Size (in ) Type
60
14
6 9
Size (in.) MPT
1-1/4
1-1/4
1-1/4
BA
950
10
—
—
Serviceable Hermetic, 1750 Rpm
DB724 DB824 DD337
....
.J...
BB
012
890
140
8
— —
—
2 2
2
1 TT
4000
1100
1
70
2 45T
3 182T 3
3 12 1
1 FPT
FPT
ODF
3/4
ODF
FPT 1
2 14
60 15 7
1 14
6 9
1 1-1/4 2
1-1/4 2
1
1-1/4 1
1
1-1/4 1
1
BA
1414
24
—
1 SC
568-720
1 11 4
3 7-4 7
2 145T
5 184T
3 106
3 16x25x2
3 20x25x2
2
1-1/8 ODM
5/8
2 11 3
1
BB
016
1221
140
15
— -
-
DD537
2
6000
1100
182T
16 9
FPT
FPT
i
ODM
FPT
14
144
1-1/2
1-1/2
1-1/4
1-1/4
Step 3 — Provide unit support.
Refer to Fig. I — Dimensions, and Table 1 —
Physical Data for unit size and weight.
Construct a stand or frame of I-beams or angle
iron that supports unit adequately, if desired. The
floor and floor joists of existing buildings may
require reinforcement; follow applicable codes.
Step 4 — Rig and place unit.
Provide space around unit for service, filter access
and overhead clearance as indicated in Fig. 1.
Move and store unit in upright position.
50BA,BB004 AND 006 — Use rollers under ship
ping rails. Unit may be moved by hand truck on any
side. Do not remove shipping rails until unit is in
final position.
50BA008 THRU 064 — Use slings with spacer under
base skid to prevent panel damage when using hoist.
Raise base skid on blocks and remove bolts. On 028
thru 064 units, unbolt fan section from skid.
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.
MODEL 50
OPERATING WEIGHTlibir~~~~~
Base Unit
Discharge Plenum
OPERATING CHARGE (lbs)
System 1
System 2
System 3
DUMPHESSOR — TYPE 06
System 1
System 2
System 3
No. of Unloading Cylinders
No of Capacity Steps
CONDENSER (BA Onl^
No. . Type
llML/<^UK hAN "
...................................................
Nominal Cfm
Standard Fan Speed Range (Rpm)
Maximum Allowable Rpm
No of Belts...Fan Pulley PD (in )
Motor Pulley PDR (in.)
Norn HP Std...Frame Size
Alt .Frame Size
Alt. .Frame Size
INDOOR COIL
No. of Rows. .Fins/in.
Total Face Area (sq ft)
RETURN AIR FILTERS
No. ...Size (in )
CONDENSER CONNECTIONS (B^Onlv)
Water Inlet - Manifolded
Water Outlet — Manifolded
refrigerant CONNECTIONsTBB^iii^
System 1 Line
System 2 Line
System 3 Line
Liquid Line
Liquid Line
Liquid Line
CONDENSATE CONNECTION ~~~ ~-
Condensate Drain
ACCESSORY HEATING COIL
Hot Water Fins/in.
Total Face Area (sq ft)
Steam Flows. Fins/in.
_ Total Face Area (sq ft)
HEAIING COIL CONNECTIONS
Hot Water
Steam
FPT
— Female Pipe Thread
Hp
— Horsepower
MPT
— Male Pipe Thread
PD
— Pitch Diameter
PDR
— Pitch Diameter Range
SC
— Shell and Coil
ST
— Shell and Tube
— Tube in Tube
Outlet
Outlet
Table 1 — Physical Data (cont)
BA 1 BB
024
i
1894 i 1464
140
17 1 7
17 1 7
DA724I DA824
DA724I DA824
0
2
2 SC 2 SC 2 SC 2 SC
8000
700-875
1100
2 100
4 0-5 0
3 182T
5 182T
4 106
180
3 16x25x2 1 6 25x20x2 1 11 oc on 9 1 20x25x2
3 20x25x2 I 2 16x20x2 1 '' | 5.16x25x2
2-1/2 FPT
2-1/2 FPT
7/8 ODM
5/8 ODM
7/8 ODM
5/8 ODM
1 FPT 1-1/4 MPT
2 113
15 7
1 14
14 4
2 1-1/2
2 1-1/2
1 1-1/4
1 1-1/4
NOTES
1 50BB008 has serviceable hermetic 1750 rpm compressor
2 Operating charge for 50BB units does not include charge for remote air
cooled condenser or connecting pipe All 50BB units are shipped with a
holding charge Operating charge values are approximate See installa
tion instructions
3 Fan motor pulleys on 50BA,BB044,054 and 064 are fixed-pitch type
4 Field-supplied 2-in filters will fit
5 Motors and drives other than those furnished with unit must be purchased
locally Installation may require field modification Contact your local
Carrier representative
BA BB
028
2491
2397
24 1 15
17 112
DA3371DA537
DA7241DA824
0
2
Adjustable
10,000
605-750
1100
2 12 4
4 3-5 3
5 184T
7-1/2 213T
10 215T
4 89
22 6
BA
BB BA 1 BB
034
2598 2430 3800
Refrige
24 1 15
24 1 15
Serviceable Herr
DA337I DA537
DA337I DA537
0
2
;, Belt-Driven Ce
12,000
685-845
1100
2 11 0
4 3-5 3
5 184T
7-1/2 213T
10 ..215T
Copper Tubes — Aluminum Fins
Factory-Supplied Throwaway Type
Size (in ) ..Type
1-1/2, 2 FPTI 2,2 FPT I 3 FPT 1 3 FPT
1-1/2, 2 FPT 2,2 FPT 3 FPT 3 FPT
Size (in
1-1/8 ODS
5/8 ODS
7/8 ODS
5/8 ODS
1-1/8 ODS
5/8 ODS
1-1/8 ODS
5/8 ODS
Size (in
1-1/4 MPT
2 14
11 7
I 14
II 4
2 14
11 7
I 14
II 4
No .. Siz
2 1-1/2
2 1-1/2
2 1-1/2
2 1-1/4
2 1-1/2
2 1-1/2
2 1-1/2
2 1-1/4
044 054
3100
rant 22
24
24
17
netic, 1750 Rpm
DA3371DA537
DA337 DA537
DA7241 DA824
0
3
ntrifugal; 1750 R
16,000
627,672,717
1100
2 154
5 6,6 0,6 4
7-1/2 213T
10 215T
489 j 490 j 490 | 4 10 6
26.9 36 5 46.3 46.3
4100
15
15
11
DA337
DA337
DA337
pm Motor
.)...Type
1-1/8 ODM
5/8 ODM
1-1/8 ODM
5/8 ODM
7/8 ODM
5/8 ODM
.). .Type
1-1/4 MPT 1-1/2 MPT 1-1/2 MPT
2 113
35 0
1 10
32 6
s (in ) MPT
3 1-1/2
3 1-1/2
2 2-1/2
2 1-1/2
BA
BB
3300 4404
29
29
29
DA537
DA537
DA537
)
2 SC
20,000
650,695,762
1100
2 154
5 8,6 2,6 8
10 215T
15 254T
1-1/8 ODM
5/8 ODM
1-1/8 ODM
5/8 ODM
1-1/8 ODM
5/8 ODM
2 113
44 8
1 10
38 8
3 1-1/2
3 1-1/2
2 2-1/2
2 1-1/2
15
15
15
BA
BB
064
3550
52 1 25
52 1 25
EA275!EA275
E5275i E5275
4
6
2 ST
24,000
785,828,895
1100
2 154
7 0,7 4,8 0
15 254T
3 FPT
3 MPT
1-3/8 ODM
7/8 ODM
1-3/8 ODM
7/8 ODM
2 113
44 8
1 10
38 8
3 1-1/2
3 1-1/2
2 2-1/2
2 1-1/2
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INDOOR AIR FAN DETAIL
BASE UNIT GENERAL VIEW
1 — Accessory Plenum
2 — Selector Switch and Thermostat
3 — Thermostatic Expansion Valve
4 — Indoor Air Fan
5 — Indoor Air Fan Motor
6 — Indoor Air Fan Motor Mounting Bracket
7 — Evaporator
8 — Thermostat Sensing Bulb
9 — Return Air Filter
10 — Refrigerant Filter-Drier
11 — Water Regulating Valve Fitting on Refrigerant Liquid Line (50BA)
12 — Low-Pressure Cutout Switch (50BA,BB006 only)
13 — Suction Pressure Gage Connection
14 — Compressor
15 — Discharge Pressure Gage Connection (50BA)
16 — Control Box
17 — Service Valves, Suction and Discharge, with Gage connections (50BB)
18 — Water-Cooled Condenser (50BA)
Fig. 2 — Base Unit Interior Details (50BA,BB004,006,008 and 012)
SERVICE VALVE DETAILS (50BB)
COMPRESSOR COMPARTMENT
LEGEND FOR
50BA024 UNIT
1 — Indoor Air Fan
2 — Selector Switch
3 “ Return Air Filters
4 — Evaporator Coil
5 — Control Box
6 ^ Compressor No 1
7 — Compressor No 2
8 — Condensers
[7J (81
Fig. 3 — Base Unit Interior Details (50BA024 Unit Shown)
Step 5 — Install accessory plenum if supplied.
On unit Sizes 004 thru 024, holes in the unit top
panel match holes in plenum. Use screws (shipped
in cloth bag taped inside plenum) to attach plenum
to unit top. See Fig. 1 and 2.
Step 6 — Position fan section as desired.
UNIT SIZES 50BA,BB004 THRU 024 are shipped
for vertical discharge. To set up these units for hori
zontal discharge, separately purchased accessory
filler panels must be field installed (see Fig. 1).
To set up unit Sizes 50BA,BB016 and 024 for
backmounted horizontal discharge (Fig. 1), proceed
as follows;
1. Remove;
a. Rear fan-section panel.
b. Upper rear coil-section panel.
c. Power connections from indoor fan 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 indoor fan motor power connections.
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 50BA,BB028 THRU 064 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 50BA,BB028 thru 064 for horizon
tal discharge (Fig. 4 and 5), 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.
Lift and position fan section on rear of coil section
(Fig. 4). Secure with fasteners provided.
3.
Install the following per Installation Step 7:
a. Motor mounting frame angles.
b. Motor on plate assembly.
c. 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.
VERTICAL DISCH
TOP MOUNTED
Motor pulley on left side of unit — vertical discharge
Motor pulley on right side of unit — horizontal discharge
Fig. 4 — Fan and Motor Arrangements
50BA,BB028,034,044,054,064
REAR HORIZONTAL FAN
AND VERTICAL FAN
DISCHARGE SOBA.BB
028,034,044,054
MOTOR MOUNTING
BRACKETS (INSTALL
AFTER MOUNTING
fan SECTION)
\ AND 064
FAN SECTION
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. 5).
b. All end panels.
NOTE; On Size 044 units, motor mounting channels
are factory installed and no angles, plates or
fasteners are necessary. In this position, the fan
motor is located on right side within fan section.
To set up Sizes 50BA,BB028 thru 064 for vertical
air discharge (Fig. 4 and 5):
1. Remove:
a. Front, rear and end panels of fan section.
Upper-rear and end panels of coil section.
b.
Filters from coil section.
c.
Fasteners holding filter frame top. Push frame
d.
out and away from coil section frame (on 028
and 034 units only).
2. Lift up and position fan section on coil section
(Fig. 5).
3. Fasten fan-section frame to coil-section frame
with fasteners provided, then (on 028 and 034
units) reposition and fasten the filter frame
moved in Step Id.
4. Install the following per Installation Step 7;
a. Motor mounting frame angles.
b. Motor on motor-plate assembly.
c. Motor-plate assembly on frame angles.
d. Balance of drive package components.
MOTOR MOUNTING
ANGLES
FAN SECTION
ADJUSTING
SCREW HOI
Fig. 6 — 028 and 034
Horizontal Fan Motor
Mounting Angles
FRAME
Fig. 7 — 054 and 064
Vertical Fan Motor
Mounting Angles
NO MOTOR MOUNTING
BRACKET USED WITH
044 SIZE UNIT
THREE FANS ON 054 AND
064 UNITS
REAR PANEL FAN SECTION
Fig. 5 — Fan Section Mounting
(50BA,BB028-064)
I
Fig. 8 — Fan Motor Mounting Detail
(50BA,BB054 and 064)
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