Carrier 09DK054-094 - Manual (Page 11)

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ITEM QUANTITY NAME DESCRIPTION
1 1 Liquid Tube % in. X 3V2 in. L
2 1 Tee 2Va in.
X
iya in
X
1% in
3 1 Discharge Tube 1% in. OD
X
5V4 in. L
4 1 Elbow % in. X % in.
5 1 Tee IVsin X % in X Vs in.
6 1 Elbow 1% in.
X
iys in
Fig. 7 — 09DK094 Tubing Package Contents
I
50/50% Coil Circuiting Applications: 074 Units
1. Piping — Refer to Fig. 10 and 21 for field piping de­
tails for 50/50% coil circuiting. Note that tube 23 requires a
cut, located exactly at the location of the hole in the tube.
Tube 23 is used in 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, or 27) and brazed be­
tween the tees (item 9) and coil header stubs. The remain­
ing tubes are not used in this application and may be dis­
carded.
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 location 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. Clamp hot gas line, tube
16, at the location specified in Fig. 21 using two 1 5/8-in.
clamps (item 4) and 4 screws supplied. Clamp the liquid
lines, tube 23, using the two 7/8-in. clamps (item 1) and
the 4 screws provided.
68/32% Coil Circuiting Applications: 074 Units
NOTE: To operate the 074 condenser units with 68/32%
coil circuiting, an accessory fan controi kit is re­
quired. See accessory installation instructions for more
information.
1. Piping — Refer to Fig. 10 and 22 for field piping de­
tails for 68/32% coil circuiting. Note that tubes 17 and 20
require cuts on the longer legs of the tubes. Tube 17 is used
in the two locations specified. Also, a 7/8-in. OD tube, ap­
proximately 3 in. (72.6 mm) long, must be cut from the
remaining tubes (23 or 27) and brazed between the tee (item
9) and coil header stub. The remaining tubes are not used
in this application and may be discarded.
2. Install Fan Cycle Pressure Switches and Clamps — Braze 3
core bodies (item 6) to designated hole locations on tubes
20, 22, 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). Note that the accessory fan
control kit is required for this coil circuiting. An extra FCPS
and valve assembly is provided with the kit. Install FCPSl,
FCPS2, and FCPS4 (item 8) at designated locations on tubes
20, 22, 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 con­
duit at the junction box with 3/8-in. field-supplied conduit
connectors. Wire FCPSl, FCPS2 and FCPS4 according to
Fig. 20. Note that FCPS2 and FCPS4 are wired in parallel.
Fan 4 is shared by the 32% and 68% refrigeration circuit;
the fan switches on if either circuit requires it. At the loca­
tion specified in Fig. 22, clamp hot gas lines, tube 15 with
a 1 3/8 in. clamp (item 3) and tube 16 with a 1 5/8 in.
clamp (item 4) with the 4 screws supplied. Clamp the liq­
uid lines, tube 22, with a 7/8 in. clamp (item 1) and tube 25
with a 1 1/8 in. clamp (item 2) with the 4 screws supplied.
11