Carrier 38EB - Manual (Page 2)

4'-0" OVERHEAD SPACE REQUIRED
FOR SERVICE AND AIRFLOW
LIQUID VALVE SERVICE PORT
CONDENSER AIRFLOW
KW r-6''AIRFL0W
■•••••■ AND SERVICE
CLEARANCE
SUCTION VALVE SERVICE PORT
^CONCRETE PAD SHOULD WEIGH 1^ TO 2 TIMES WEIGHT OF UNIT
Certified dimension drawings available upon request
Fig. 1 — Dimensions, Connections and
Mounting Pad (Refer to Table 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. Pistons are cor-
rectly sized for an evaporator of the same capacity as
the condensing unit, so piston change is not neces­
sary. Mix-matching of condensing unit with evap­
orator requires field replacement of piston. Refer to
Table 2. Replace piston, if required, before connec­
ting refrigerant lines. Piston replacement instruc­
tions are included in evaporator installation book.
After system installation is complete, use Charging
Chart to check and/or adjust refrigerant charge.
Condensing Units Connected to Carrier-Approved
Evaporators — Condensing units contain correct
system refrigerant charge for operation with evap­
orator of the same size when connected by 25 ft or
less of field-supplied or Carrier accessory tubing.
Check refrigerant charge for maximum efficiency
(see Refrigerant Charging, page 6).
Table 2 — Optimization Chart
(Outdoor air design temperature, db-F,
100 F and below)
COND
UNIT
38EB
ACCURATER™ PISTON NO.
Evap Size (Coil or Fan Coil)
015 TWl 46 i
018 ’ . 4
024
030
036
042
048
060
ÒTFI”M4TCÌ301 > I j_V'
52
57
036 042 048 060
TXV
— — —
65 TXV — —
6? 70
76
_
—
TXV
,...78...
62
TXV
i 82
p»
Factory-installed piston. Obtain replacement pistons thru
local Carrier distributor.
njmm
Fig. 2 — AccuRater (Bypass Type)
Components
Step 2 — Make Piping Connections — Con­
densing units may be connected to evaporator sec­
tions using Carrier accessory tubing package (Table
3) or field-supplied tubing of refrigerant grade,
correct size and condition (Table 1). For tubing
requirements beyond 50 ft, obtain information from
local Carrier distributor.
If or
1$ osigd wism saaldog
If 1-1/8 in. tubing is used (38EB048,060), braze
it to the accessory 1 -1 / 8 x 3/4-in. suction connection