Carrier 50BA User Manual
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Number One
AirConditbning
Maker
Carrier Parkway • Syracuse, N Y 13201
Single-Package Cooling Units
INSTALLATION
Unit Support — Refer to Fig. 1 and Table 1 for
unit weight and dimensions. Construct a stand or
frame of I-beams or angle iron that supports unit
weight and size if desired. The floors and floor
joists of existing buildings may require reinforce
ment. Follow applicable codes.
Rigging and Unit Placement — Inspect unit for
shipping damage. File any claims with trans
portation agency. Provide space around unit for
service, fdter access and overhead plenum clearance
(Fig. 1). Use rollers under shipping rails. Unit may
be moved by hand truck on any side. Do not
remove shipping rails until unit is at final location.
Unit Isolation — If desired, install isolators be
tween floor and base of unit.
Installing Accessory Plenum — Holes in unit top
panel match holes in plenum. Use screws provided
(shipped in cloth bag taped inside plenum) to
attach accessory plenum to top of unit. See Fig. 1
and 2.
Installing Heating Coil — Water and steam heating
coils must be installed thru the back of the unit
as described in Installation Instructions shipped
with accessory coil.
Supply Air (Evaporator) Ductwork — Connect
ducts to flanges on air supply opening (Fig. 1) with
a flexible connection. Attach ductwork to building
structure and insulate with fiber glass and vapor
barrier to prevent sound transmission and
condensation.
Alternate Return Air Opening — Unit back panel is
stamped to indicate alternate return air (or out
door air inlet) opening as shown in Fig. 1.
1. Cut out alternate return air opening as required.
Table 1 — Physical Data
UNIT 50BA004
SOB B 004
50BA006
50BB006
OPERATING WT (lb)
390
330 427
360
Accessory Plenum
25 (approx)
COMPRESSOR No. ... Type
1 . M34
1 M34 1 R542
1 R702
Cy! inders
2
2 3
4
Oil Capacity (pts)
3
3
5 5
Crankcase Heater
No
Yes No Yes
REFRIGERANT, TYPE 22 Full
Holding
Full Holding
Operating Charge (lb) 3 5 + 25
-
4 6 + 25
-
INDOOR AIR FAN, Type
Nominal Cfm
Motor Hp ... Frame (NEMA)
Motor Pulley Pitch Diameter
Fan Pulley Pitch Diameter
Belt No. ... Size
Fan Speed Range (Rpm)
Max Allowable Fan Speed (Rpm)
Speed Change per 1/2 turn of
movable motor pulley flange (Rpm)
Movable Pulley — Max full turns
from closed position
Factory Setting (full turns open)
INDOOR AIR FILTERS,
Size (in.)
No.
_______
_
______
__
PRESSURE SWITCHES
High (P='9)
Cut-in (psig)
Low
Type
Cutout (psig)
Cut-in (psig)
Adjustable, Belt-Driven Centrifugal
1200
1200
2000
2000
Std
/3 ... 48
‘/3 ... 48
14 ... 56
% ... 56
Alt
% ... 56
Y4 ... 56
1 ... 56 1 ... 56
Std
1.9 to 2 9
1.9 to 2.9
2 4 to 3 4
2.4 to 3 4
Alt
2.4 to 3 4
2 4 to 3.4 3.4 to 4 4
3 4 to 4 4
6 4
6 4 6 4 6.4
1 . 4L480
1 4L480 1 4L480 1 . 4L480
Std
512 to 782
512 to 782
647 to 915 647 to 9 15
Alt
647 to 915
647 to 915
9 16 to 1186 916 to 1 186
1100
1100 1100 1100
Std
27 0
27 0
26.8 26.8
Alt
26 8
26 8
27.0
27 0
5
5
5
5
3V2
3V.
4
4
1-in. Throwaway
16 X 25
16 X 25
16 X 25
16 X 25
2
2
2
2
428 ^ ^
-
428 „
-
320 + 20
-
320 + 20
-
_
27 + 4
27 + 4
-
-
60 to 78
60 to 78
NOTES: 1 Fan motor with 48 frame has 1/2-i
motor cannot be used on 48 frame
2. Water-cooled condenser maximum
n diam shaft: 56 frame, 5/8-in shaft. 56 frame
motor mounting bracket,
working pressure on water side is 450 psig
© Carrier Corporation 1977
Form 50BA,BB-5SI
Summary of Contents
Page 1 - Single-Package Cooling Units
Number OneAirConditbningMakerCarrier Parkway • Syracuse, N Y 13201Single-Package Cooling UnitsINSTALLATIONUnit Support — Refer to Fig. 1 and T
Page 2 - Fig. 1 — Base Unit Dimensions
LEFT SIDE VIEWFRONT VIEWDIMENSIONS (ft-in.)UNIT AB c D F F G H JK L M NPQR s T50BA004Ì 1-1OV21-10-3% 0-20-1 OVa0-8_O-OV20-0V20-y«_ __—__l-UXe50BB004 Ì
Page 3
<HшÛZ<<ocOOQ aЪO’ -JLU><ccLUZLUOHZ DШСЛ<mO Шp>c ™c O _0) Ji UI-zLUS(—oc<a.2OOccOСЛСЛLU00Q.§OOO O4--O O0) L. >.9^15Q>CO ш
Page 4
Air-Cooled Condenser Connections (50BB Condenserless Units) — Install air-cooled condenser in accordance with Installation Instructions shipp
Page 5 - START-UP
SCHEMATIC COMPONENT ARRANGEMENT[4]—BLU—(Т)-11-(з)—BLU-(5]--TO OUTDOOR FAN MOTOR (50BB ONLY)«C — Compressor ContactorDU — Dummy TerminalFu — FuseGnd —
Page 6 - Table 2 — Electrical Data
Table 2 — Electrical DataUNITNOMINALV-PH-HZVOLTAGE RANGE Min —MaxCOMPRESSORINDOORFANMOTORFLAPOWER SUPPLYMinCktAmpsMaxFuseAmpsRLALRA50BA004300230-1-602
Page 7 - W!TH saj
%m#FIELD-SUPPLIED MOTORS - Factory-installed motor mounting bracket for 48 frame motors will not fit 56 frame motors. When replacing
Page 8 - Charging the System
except for servicing unit. Unit main power supply must be on for at least 6 hours after an extended “power off’ interval before c
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