Carrier 38AD - Refrigerant Piping Guidelines; Refrigerant Line Sizing; Single Pumpout Control Setup; Refrigerant Drier & Moisture Indicator

FROM FAN
CONTACTOR
200, 208, 230
OR 460 VOLTS
200, 208-, AND 230-VOLT UNITS
.^ffV vBRN a BRN.
MOTOR
SUITABLE FOR
USE WITH
32LT
'MOTORMASTER
SPEED
CONTROLLER*
200-, 230“V RATED
CONTROLLER
*Use 230-volt controller with 200-,208- or 230-volt motors
Fig. 7 — Motormaster® Electrical Connections
Table 4 — Components Required for
MOTORMASTER Use
UNIT
MODEL
RUN
CAPACITOR
TRANS¬
FORMER
MOTOR
38AD024
600
100
HC96LH020
HT01AH951
HT01AH959
HC46VL220 or
HC46VL221
38AD028
38AD034
38AD044
38AB054
38AB064
38AB084
600
HC96LH030
HT01AH952
HC52TE230
100
HT01AH954
REFRIGERANT PIPING
Refrigerant Line Sizes will depend on length of
piping required between condensing unit and evap¬
orator. Consideration must be given to liquid lift
and to compressor oil return. Refer to Part 3 of
Carrier System Design Manual for line sizing
information and Fig. 8 for recommended piping
details.
Single Pumpout Control — All units are factory
wired to operate on single pumpout control and
require a field-supplied liquid line solenoid valve,
sized for minimum pressure drop, to be installed
immediately ahead of each expansion valve. If unit
is to be used with a chiller, wiring modifications
may be necessary. Refer to 38AB Application
Data, Chilled Water Applications.
Refrigerant Drier and Moisture Indicator — A
filter-drier(s) and a liquid-moisture indicator are
shipped with unit for field installation. Refer to
Fig. 9 for typical recommended piping arrange¬
ments and to Table 5 for physical data on driers.
Receiver — No receiver is provided with unit. It is
recommended that one not be used.
Piping Procedure — Do not remove plastic dust
plugs from suction and liquid line stubs in com¬
pressor compartment until piping connections are
ready to be made. Pass nitrogen or other inert gas
thru piping while brazing, to prevent formation of
copper oxide.
NOTES 2 D as used in 8D etc, indicates the pipe diameter size as a measure of length
1 Lower split first on, last off 3 TXVE indicates Thermostatic Expansion Valve Equalizer Connection
Fig. 8 — Typical Piping Connections for Face Split Coils
77 7
4