Carrier 38AK024-044 - Manual

HEATING A COOLING
38AK024-044
Air-Cooled Condensing Units
Installation, Start-Up and Service Instructions
50- and 60-Hertz Air-Cooled Packages
CONTENTS
Page
SAFETY CONSIDERATIONS ......................................... 1
BEFORE INSTALLATION............................................. 1-3
Rigging ...........................................................................l
Placing Unit .................................................................. 3
Mounting Unit............................................................... 3
Compressor Mounting ................................................. 3
INSTALLATION .......................................................... 3-10
Refrigerant Piping Connections .................................. 3
Single Pumpout Control............................................... 3
Filter Drier and Moisture Indicator............................... 3
Receiver ......................................................................... 3
Piping Procedure ........................................................... 3
Power Supply ................................................................. 5
Power Wiring.................................................................. 5
START-UP ................................................................11-16
Initial Check................................................................... 11
Leak Test and Dehydration ......................................... 11
Preliminary Charge ...................................................... 11
Start Unit ....................................................................... 11
Page
Charge System .........................................................11
Operation .................................................................. 11
Timer Functions ........................................................16
Sequence of Operation.............................................16
Complete Unit Stoppage ......................................... 16
SERVICE .............................................................. 17-19
Access for Servicing ................................................17
Fan Adjustment ........................................................ 18
Oil Charge ................................................................. 18
Liquid Shutoff/Charging Valve ............................... 18
Capacity Control .......................................................18
Oil Pressure Safety Switch (OPS) .......................... 19
Compressor Protection............................................ 19
High-Pressure Switch .............................................. 19
Low-Pressure Switch ...............................................19
Winter Start Control ................................................. 19
Head Pressure Control............................................ 19
TROUBLESHOOTING .20
SAFETY CONSIDERATIONS
Installing, starting up and servicing air conditioning
equipment can be hazardous due to system pressures,
electrical components and equipment location (roofs, ele­
vated structures, etc.)
Only trained, qualified installers and service mechanics
should install, start-up and service this equipment (Fig. 1).
Untrained personnel can perform basic maintenance
functions such as cleaning coils. All other operations should
be performed by trained service personnel.
When working on the equipment, observe precautions in
the literature and on tags, stickers and labels attached to the
equipment.
• Follow all safety codes.
• Wear safety glasses and work gloves.
• Keep quenching cloth and fire extinguisher nearby when
brazing.
• Use care in handling, rigging and setting bulky equipment.
• See Table 1 for Physical Data.
ELECTRIC SHOCK HAZARD
Cm
Open all remote disconnects before
tr
servicing this equipment.
BEFORE INSTALLATION
Rigging
— Preferred method is with spreader bars
from above the unit. Use 2-in. (50 mm) OD pipe or
hooks in lifting holes. Rig with 4 cables and spreader
bars. All panels must be in place when rigging. See
rigging label on unit for details concerning shipping
weights, distance between lifting holes, center of
gravity and spreader bar dimensions. See Fig. 2.
If overhead rigging is not possible, place chiller on
skid or pad for rolling or dragging. When rolling, use
minimum 3 rollers. When dragging, pull the pad.
Do
not apply force to the unit When in final position, raise
from above to lift unit off pad.
A CAUTION
All panels must be in place when rigging. Do not fork
units if no skid is supplied. If unit has skid, truck from
sides only.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obiigations.
Book 1
Tab
I
3a
PC111 Catalog No 563-915 Printed in U S A Form 38AK-1SIM Pgi 11-89 Replaces: New