Carrier 38EB - Manual (Page 9)

SUCTION LINE HOT GAS DISCHARGE LINE
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.CONDENSER COIL
COMPRESSOR
DISCHARGE GRILLE (FAN
MOTOR UNDERNEATH)"
WIRE ACCESS OPENING
TOP COVER
FAN MOTOR
AND
COMPRESSOR
LEADS
Fig. 7 — Condensing Unit 38EB Component Locations
Follow safety codes. Wear safety glasses and
work gloves. Have quenching cloth available.
1. Remove top cover by loosening 6 screws around
unit and 2 screws in connector plate. Lift cover
straight up.
2. Disconnect high- and low-voltage field wiring
and fan motor leads from capacitor and
contactor.
3. Remove 4 screws holding discharge grille in
place. Lift grille from unit.
4. Disconnect compressor leads (crankcase heater,
low-pressure switch, if so equipped) from elec­
trical components and pull them thru the wire
access opening into the coil section. Lift fan
orifice/control ring after pinching and pressing
down on 3 plastic pins of tube supports.
5. Remove louvered casing by taking out 16 screws
securing it to the cabinet and sliding it away
from the coil.
6. Using a midget tubing cutter, cut liquid and
discharge lines on the coil and suction line at a
convenient place for easy reassembly with
copper slip couplings.
7. After plugging connections, remove condenser
coil by pinching plastic pins of tube supports
that extend into basepan and lift vertically. Set
coil on a clean, flat surface.
8. Remove compressor holddown bolts and slide
out compressor. Remove crankcase heater, if
so equipped.
9. Carefully unbraze suetion and discharge line
piping stubs from compressor after noting posi­
tion of stubs to assist when reinstalling.
10. Install new compressor, placing crankcase
heater around compressor, if so equipped. Be
sure compressor holddown bolts are in place.
11. Replace coil; braze suction and discharge lines
to compressor piping stubs (at points where cut.
Step 6); rewire compressor and leak test.
12. Replace fan orifice/control ring; connect com­
pressor wires after feeding them thru control
ring; replace fan/grille assembly and rewire;
connect high- and low-voltage power wiring;
and replace louvered casing.
13. Replace top cover by running screws into orifice
loosely and tighten when cover is in place.
14. Evacuate and recharge system.
Filter Drier — Install field-supplied filter drier
(Table 3) in system liquid line when refrigerant
system is opened for serviee as described under
Compressor Removal. Position drier in liquid line
at convenient location.
Pumpdown Procedure — The system may be
pumped down in order to make repairs on low side
without losing complete refrigerant charge.
1. Attach pressure gage to suction service valve gage
port.
2. Frontseat the liquid line valve.
3. Start unit and run until suction pressure reaches
5 psig (see Caution).
4. Shut unit off and frontseat suction valve.
5. Vent remaining pressure to atmosphere.