Carrier 38ED - Manual

Number One
Ar Conditioning
Maker
O c
c
Installation, Start-Up "
and Service Instructions
Carrier Parkway • Syracuse, N Y 13221
Air-Cooled Condensing Units
INDEX
Page
SAFETY CONSIDERATIONS.................................. 1
INSTALLATION........................................................1-6
Step 1 — Check Equipment and
Jobsite................................................................ 1
• UNPACK UNIT
• INSPECT EQUIPMENT
• COMPLETE OR CONSIDER
SYSTEM REQUIREMENTS
Step 2 — Make Piping Connections_________ 2
• REPLACE THE ACCURATER™
REFRIGERANT CONTROL
PISTON IN THE INDOOR
COIL IF REQUIRED
• CONNECT REFRIGERANT LINES
Step 3 — Install Solenoid on Indoor
Coil Liquid Line Fitting......................................3
Step 4 — Make Electrical
Connections....................................................... 4
• INSTALL A BRANCH CIRCUIT
DISCONNECT PER NEC
• ROUTE LINE POWER LEADS INTO
UNIT
• CONNECT GROUND LEAD AND
POWER WIRING
• CONNECT CONTROL POWER
WIRING
START-UP............................................................... 6-8
SERVICE.................................................................. 8-10 '
MAINTENANCE......................................................10-12
SAFETY CONSIDERATIONS
Installation and servicing of air conditioning
equipment can be hazardous due to system pressure
and electrical components. Only trained and quali­
fied service personnel should install, repair or
service air conditioning equipment.
Untrained personnel can perform basic mainte­
nance functions of cleaning coils and filters and re­
placing filters. All other operations should be per­
formed by trained service personnel. When working
on air conditioning equipment, observe precautions
in the literature, tags and labels attached to the unit
and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and
work gloves. U se quenching cloth for brazing opera­
tions. Have fire extinguisher available for all brazing
operations.
INSTALLATION
Step 1 — Check Equipment and Jobsite
UNPACK UNIT — Move to final location. Slide
from carton taking special care not to damage serv­
ice valves or grilles.
INSPECT EQUIPMENT — File claim with ship­
ping company if damaged or incomplete. Check
factory supplied (field installed) liquid line solenoid
valve for shipping damage.
COMPLETE OR CONSIDER SYSTEM RE­
QUIREMENTS before installation;
Consult local building codes and National Elec­
trical Code (NEC) for special installation
requirements.
When installing, allow sufficient space for airflow
clearance, wiring, refrigerant piping and service.
Maintain a minimum of 4 ft clearance from obstruc­
tions above and 18 in. on sides of unit. Maintain a
distance of 24 in. between condensing units. Posi­
tion so water from roof or eaves does not flow
directly on unit.
Install on a solid, level mounting pad. It is not
necessary to attach unit to pad but if desired or
required by local code, position tiedown bolts in
pad. Fasten unit to pad using 2 holes provided in
unit base. See Fig. 1.
Carrier Cooling System Capacity Optimization —
AccuRater™ (bypass type) refrigerant control, with
field-replaceable piston (see Fig. 2), is supplied on
evaporator. Use Optimization Chart, Table 2 to
find AccuRater piston size required for condenser/
evaporator system being installed.
© Carrier Corporation 1983 Form 38ED-1SI