Hot Gas Bypass Piping And Wiring; Install Piping - Carrier AERO 39MN Installation, Start-Up And Service Instructions Manual

Manifolding for 2-Row Splits — Refer to Fig. 76 for coils
with less 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 connec-
tions 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 auxilia-
ry side connector to each distributor of coil split that is first
on, last off. Refer to installation instructions for Hot Gas
Bypass.

Hot Gas Bypass Piping and Wiring

INSTALL PIPING (See Fig. 77)
WARNING
Shut off all power to the unit and remove refrigerant charge
using an approved refrigerant recovery device before pro-
ceeding with installation.
1. In applications where the air handler refrigerant distrib-
utor is not equipped with a side outlet connection, it is
recommended that a Sporlan in-line auxiliary side
connector with standard distributor be used. Refer to the
AIRFLOW
SUCTION LINE
FOR COIL
CONNECTIONS
1 AND 3
SUCTION LINE
FOR COIL
CONNECTIONS
2 AND 4
LEGEND
TXV — Thermostatic Expansion Valve
—
TXV SENSING
BULBS
2
TXV SENSING
BULBS
4
Fig. 76 — Row-Split Coil Manifolding (Typical)
88
installation instructions for the indoor fan coil to obtain
nozzle size and distributor connection size. Select the
auxiliary side connector based on this information. The
side connector must be installed on refrigerant circuit
no. 1 (first stage of cooling) of the fan coil being used.
2. Install a field-supplied
on the gage connection port of the compressor suction
service valve.
3. Sweat the pilot solenoid valve supplied in the hot gas
accessory package directly to the hot gas bypass valve
on the / -in. ODF external equalizer port.
3
8
4. Install field-supplied 1
nut on each end) between the compressor suction valve
and the hot gas pilot solenoid valve.
5. Connect a field-supplied
the discharge line process tube (hot gas stub) and a field-
supplied manual shutoff service valve, avoiding any
traps in piping.
6. Connect another field-supplied
between the manual shutoff valve outlet and the hot gas
bypass valve inlet.
7. Connect a field-supplied
the leaving side of the hot gas bypass valve and the
Sporlan auxiliary side connector (distributor-side con-
nector).
8. Refer to Hot Gas Bypass installation instructions for
wiring information.
SIGHT GLASS
1
SOLENOID VALVE (TYP)
2
1
3
4
3
TXV INSIDE CASING (TYP)
DISTRIBUTOR (TYP)
1 / -in. NPT to 1 / -in. flare fitting
4 4
/ -in. copper tube (flared with a
4
/ -in. OD copper tube between
5
8
/ -in. OD copper tube
5
8
5 / -in. OD copper tube between
8
FILTER
DRIER
LIQUID LINE
FOR 1 AND 3
LIQUID LINE
FOR 2 AND 4
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