Carrier 38EH - Manual

HEATING & COOLING
38EH
Air-Cooled Condensing Units
Installation and Start-Up 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 instructions
thoroughly. Consult local building codes and NEC
(National
Electrical Code) 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
Step 1 — Install on a Solid, Level Mounting
Pad — It is recommended that unit be attached to pad
using tiedown bolts. Fasten unit to pad using holes pro­
vided in unit base. See Fig. I
When installing, allow sufficient space for airflow
clearance, wiring, refrigerant piping and service. Main­
tain a minimum of 4 ft clearance from obstructions above
and 18 in around unit (I2in. on valve side). Main­
tain a distance of 24 in. between condensing units.
Position so water or ice from roof or eaves cannot
fall directly on unit.
Step 2 — Replace Indoor AccuRater™ Piston
if Required — Check indoor coil piston to see if it
matches the required piston listed in Table 2. If it does
not match, replace indoor coil piston with piston shipped
with this outdoor unit (located in plastic bag taped to
valves). See Fig. 2.
Step 3 — Make Piping Connections — Outdoor
units may be connected to indoor sections using Carrier
accessory tubing package or field-supplied tubing of
refrigerant grade, correct size (see Table I) and condition.
For tubing requirements beyond 50 ft, obtain informa­
tion from Carrier distributor.
OUTDOOR UNITS CONNECTED TO CARRIER-
APPROVED INDOOR UNITS — Outdoor units con­
tain correct system refrigerant charge for operation with
indoor unit of the same size when connected by 25 ft of
field-supplied or Carrier accessory tubing. Check refrig­
erant charge for maximum efficiency (see Refrigerant
Charging)
4'0" OVERHEAD SPACE REQUIRED
FOR SERVICE AND AIRFLOW
CONTROL
BOX
LOUVERED
CASING
I DIAM
HOLE FOR^
CONTROL
WIRING
LIQUID
VALVE '
SERVICE
PORT
(HIDDEN)
SUCTION VALVE
SERVICE PORT
' AIRFLOW
I-6 AIRFLOW AND SERVICE
CLEARANCE AROUND UNIT
-I2" ON VALVE SIDE
Certified dimension drawings available upon request
Fig. 1 — Dimensions, Connections and
Mounting Pad (Refer to Table 1)
For replacement items use Carrier Specified Parts
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Bookh |4 PC101 Catalog No 533-813 PrintedinUSA Form38EH-5SI Pg 1 1-86 Replaces: 38EH-3SI
Tab J3a 2a