Carrier 38AF - Manual

HEATING & COOLING
38AF
Air-Cooled Condensing Units
Installation, Start-Up and Service Instructions
SAFETY CONSIDERATIONS
Installing and servicing air conditioning equipment
can be hazardous due to system pressure and electrical
components. Only trained and qualified service personnel
should install or service air conditioning equipment.
Untrained personnel can perform basic maintenance,
such as cleaning and replacing filters. All other opera­
tions should be performed by trained service personnel.
When working on air conditioning equipment, observe
precautions in literature and on tags and labels attached
to unit.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instruc­
tions thoroughly. Consult local building codes and
National Electrical Code (NEC) for special installation
requirements.
A WARNING
Before installing or servicing system, always turn off
main power to system. There may be more than one
disconnect switch. Turn off accessory heater power if
applicable. Electrical shock can cause personal injury.
Table 1 — Physical Data
UNIT 38AF 007 008
OPER WEIGHT (lb) 300 400
REFRIGERANT* 22 22
COMPRESSOR
Oil (pts) 46 8 0
Crankcase Heater Watts 40 40
CONDENSER AIR FAN Propeller; Direct Drive
Number...Rpm 1 1075 1 1075
Diameter (in.) 22 22
Motor Hp (NEMA) '/2 v?
Nominal Cfm Total 3500 4300
CONDENSER COIL
Face Area (sq tt) 108 17 7
Storage Capacity (lb)f 168 18 0
CONTROLS
Pressurestat Settings
High Cutout 426 ± 7 psig
Cut-in 320 ± 20 psig
Low Cutout 27 ± 4 psig
Cut-In 67 ± 7 psig
FUSIBLE PLUG 200 F
*Unit is factory supplied with holding charge only.
tStorage capacity of condenser coil with coil 80% full of liquid R-22
at 124 F
INSTALLATION
Step 1 — Complete Pre-Installation Checks
UNCRATE UNIT — Remove unit packaging except for
the top skid assembly and wood bumpers, which should
be left in place until after unit is rigged into place.
INSPECT SHIPMENT — File claim with shipping com­
pany if shipment is damaged or incomplete.
CONSIDER SYSTEM REQUIREMENTS
• Consult local building codes and National Electrical
Code (NEC) for special installation requirements.
• Allow sufficient space for airflow clearance, wiring,
refrigerant piping, and servicing unit. See Fig. 1.
• Locate unit so that condenser airflow is unrestricted
on all sides and above. Refer to Fig. 1.
• Unit may be mounted on a level pad directly on base
channels or mounted on raised pads at support points.
See Table 2 for weight distribution based on recom­
mended support points.
NOTE: If vibration isolators are required for a parti­
cular installation, use data in Table 2 to make proper
selection.
Step 2 — Rig and Mount the Unit
A CAUTION
Be sure unit panels are securely in place prior to
rigging.
RIGGING — These units are designed for overhead
rigging only. Traverse base channels are provided with
1 -1 / 2 in. rigging holes that are located 1 -3/ 4 in. from each
end. Rig with top skid packaging assembly and wood
bumper strips in place to prevent unit damage by rigging
cable. As further protection for coil faces, plywood sheets
may be placed against sides of unit, behind cables. Run
cables to a central suspension point so that angle from the
horizontal is not less than 45 degrees. Raise and set unit
down carefully.
If it is necessary to roll unit into position, mount unit
on longitudinal rails, using a minimum of 3 rollers. Apply
force to rails, not unit. If unit is to be skidded into posi­
tion, place it on a large pad and drag it by the pad. Do not
apply any force to unit.
Raise from above to lift unit from rails or pad when
unit is in final position.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without Incurring obligations.
BookM |4 PC111 Catalog No 563-852 PrintedinUSA Form38AF-1SI Pg 1 4-85 Replaces: New
For replacement items use Carrier Specified Parts Tab I3al2a