Carrier 09DK054-094 - Manual (Page 16)

094 Units
FCPS2
NOTES:
1 FCPS1
Fan cycle pressure switch 1 cycles fan 3
in response to condensing pressure.
FCPS2 = Fan cycle pressure switch 2 cycles fan 4
in response to condensing pressure
Fig. 9 — Typical Field Piping Arrangements (cont)
100% Coil Circuiting Applications: 084 Units
1. Piping — Refer to Fig. 10 and 23 for field piping de­
tails for 100% coil circuiting. Note that tubes 16 and 20 re­
quire cuts on the longer legs of the tubes. Two 7/8-in. OD
tubes, approximately 3 in (72.6 mm) long, must be cut
from the remaining tubes (22 or 23) and brazed between the
tees (item 9) and coil header stubs. The remaining tubes are
not used in this application and may be discarded.
2. Install Fan Cycle Pressure Switches and Clamps — Braze 2
valve core bodies to designated hole locations on tubes 20
and 24. Insert valve cores into valve core bodies by thread­
ing into place and tightening to 1.5 to 3 in.-lb (169.5 to
339 mN-m). Install FCPSl and FCPS2 at designated loca­
tions on tubes 20 and 24. Cut the 3/8-in. field-supplied FCPS
conduit to fit between each FCPS location and the junction
box on the unit. See Fig. 13 for typical conduit installation.
Feed FCPS wires through each conduit and secure at the
switch using each conduit connector See Fig. 15. Secure
the conduit at the junction box with 3/8-in. field-supplied
conduit connectors. Wire FCPSl and FCPS2 according to
Fig 20. At the location specified in Fig. 23, clamp hot gas
line, tube 28, using 2 1/8-in. clamp and 2 screws provided.
Clamp the liquid line, tube 25, using 1 1/8-in. clamp and
2 screws provided.
50/50% Coil Circuiting Applications: 084 Units
1 Piping — Refer to Fig. 10 and 24 for field piping de­
tails for 50/50% coil circuiting. Note that tube 20 requires a
cut on the longer leg of the tube. Tube 23 requires a cut
located exactly at the location of the hole in the tube, and is
used at the two locations specified. Two 7/8-in. OD tubes,
approximately 3 in. (72.6 mm) long, must be cut from the
remaining tubes (22, 26, and 27) and brazed between the
tees (item 9) and coil header stubs. The remaining tubes are
not used in this application and may be discarded.
2. Install Fan Cycle Pressure Switches and Clamps — Braze 2
valve core bodies (item 6) to designated hole locations on
tubes 20 and 24. Insert valve cores (item 7) into valve core
bodies by threading into place and tightening to 1.5 to
3 in.-lb (169.5 to 339 mN-m). Install FCPSl and FCPS2
(item 8) at designated locations on tubes 20 and 24. Cut the
3/8-in field-supplied FCPS conduit to fit between each FCPS
location and the junction box on the unit. See Fig. 13 for
typical conduit installation. Feed FCPS wires through each
conduit and secure at the switch using each conduit con­
nector See Fig. 15. Secure the conduit at the junction box
with 3/8-in. field-supplied conduit connectors. Wire FCPSl
and FCPS2 according to Fig. 20. At the location specified
in Fig. 24, clamp hot gas line, tube 16, using two 1 5/8-in.
clamps and 4 screws provided. Clamp the liquid lines, tubes
23, using two 7/8-in. clamps (item 1) and 4 screws
provided.
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