Carrier 50BA - Manual

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)
C u t - i n (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 Y 4 ... 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 1 1 0 0 1100
Std 27 0 27 0 26.8 26.8
Alt 26 8 26 8 27.0 27 0
5 5 5 5
3 V 2 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