Carrier 50BA - 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.
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................... I
Step 2 — Protect units from damage............... 1
Step 3 — Provide unit support.......................... 4
Step 4 — Rig and place unit.............................. 4
Step 5 — Install accessory plenum,
if supplied....................................... 7
Step 6 — Position fan section as desired. .. 7,8
Step 7 — Install fan motor.................................. 9
Step 8 — Align fan shaft and wheel.......... 10,11
Step 9 — Install heating coil, if supplied. .. 11
Step 10 — Install supply air (evaporator)
ductwork........................................ 11
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
Page
Step 11 — Install return air ductwork
(004-012 units).................................... II
Step 12 — Check return-air filters....................... 11
Step 13 — Check compressor spring
mounts.............................................. 11
Step 14 — Make condenser
connections.....................................11,14
Install unit drain line........................ 15
Make electrical connections. ... 16-18
......... 18
......... 18
......... 18
......... 18
......... 18
......... 19
......... 19
Lubrication............................................................. 20
Return-Air Filters................................................... 20
Condensate Drains ................................................. 20
Evaporator Coil...................................................... 20
Water-Cooled Condenser...................................... 20
Air-Cooled Condenser........................................... 20
Charging the System.......................................... 20,21
Return-Air Grille Removal ..................................... 21
Access Panel Removal.......................................... 22
Indoor-Air Fan Motor Removal............................. 22
Pressure Relief Devices........................................ 22
Crankcase Heaters................................................ 22
High and Low Pressurestats................................ 22
Time Guard® Control Circuit................................ 22
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