Carrier 38QB - Manual (Page 10)

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
seeuring it to the cabinet and sliding it away
from the eoil.
6. Using a midget tubing cutter, cut liquid and
discharge lines on the coil and suction and
discharge lines at a convenient place near the
compressor for easy reassembly with copper
slip couplings.
8 .
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.
Remove compressor holddown bolts and slide
out compressor. Remove crankcase heater.
9. Carefully unbraze suction and discharge line
piping stubs from compressor after noting posi­
tion of stubs to assist when reinstalling.
10. Install new eompressor, placing crankcase
heater around compressor. 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 4 screws into
orifice loosely (2 on each side of unit) and
tighten when cover is in place. Replace remain­
ing screws.
14. Evacuate and recharge system.
CHARGING AND PRESSURE CHECK CHARTS
Fig. 8 — 38QB015 with 28HQ.VQ018,
40AQ018 or 40DQ018 Cooling Cycle
Charging Chart
Fig. 9 — 38QB015 with 28HQ,VQ018,
40AQ018 or 40DQ018 Heating Cycle
Operation Check Chart
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