Carrier 39T User Manual

SPECIAL PIPING FOR DOUBLE-CIRCUIT COILS — All
8-row coils that are double circuited require special piping
to manifold suction and liquid lines. See Table 20 for num-
ber of coils, splits, and TXVs per coil section.
Manifolding for 2-Face Splits — Refer to Fig. 52 for coils
with less than 34 tubes in face. Refer to Fig. 53 for coils
with more than 34 tubes in face. Externally manifold as
follows:
1. Coils with less than 34 tubes: Connect the 4 expansion
valves to the 4 distributors on each coil and connect the
4 suction lines to the 15-diameter-long risers as outlined
in previous piping instructions. Refer to Fig. 52.
Coils with more than 34 tubes: Connect the 8 expansion
valves to the 8 distributors on each coil and connect the
4 suction lines to the 15-diameter-long risers as outlined
in previous piping instructions. Refer to Fig. 53.
2. Install common liquid line for upper face split to first (up-
per) and second expansion valves. Also, install a com-
mon suction line from suction lines attached to first (up-
per) and second suction header connections.
3. Repeat Step 2 for lower face split using third and fourth
distributor and suction connections.
4. For units with two coils repeat procedures of steps 1, 2
and 3 for second coil.
Manifolding for 2-Row Splits — Refer to Fig. 54 for coils
with less than 34 tubes in face. Refer to Fig. 55 for coils
with more than 34 tubes in face. Externally manifold as out-
lined for the 2-face splits with the following exceptions:
1. Manifold in pairs, the first and third coil connections for
one split.
2. Manifold the second and fourth pairs of coil connections
for the other split.
NOTE: Split section using first and third pairs of coil con-
nections should be first on, last off.
Hot Gas Bypass Connection for Double-Circuited Coils —
For either face or row splits connect a hot gas bypass aux-
iliary side connector to each distributor of coil split that is
first on, last off. Refer to installation instructions for Hot Gas
Bypass, page 60.
LEGEND
TXV — Thermostatic Expansion Valve
Fig. 51 — Row-Split Coil Manifolding (Typical)
62

Carrier 39T Specifications

General

Brand	Carrier
Model	39T
Category	Air Handlers
Language	English