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

Manifolding for 2-Row Splits — Refer to Fig. 103 for coils
with less than 34 tubes in face. Externally manifold as outlined
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 connec-
tions 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 auxiliary
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. 104)
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 dis-
tributor 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 installation instructions for the indoor fan coil to
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. 103 — Row-Split Coil Manifolding (Typical)
132
obtain nozzle size and distributor connection size. Se-
lect the auxiliary side connector based on this informa-
tion. The side connector must be installed on refriger-
ant circuit no. 1 (first stage of cooling) of the fan coil
being used.
2. Install a field-supplied
ting 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
nut on each end) between the compressor suction valve
and the hot gas pilot solenoid valve.
5. Connect a field-supplied
tween 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
tween the leaving side of the hot gas bypass valve and
the Sporlan auxiliary side connector (distributor-side
connector).
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 fit-
4 4
1 / -in. copper tube (flared with a
4
/ -in. OD copper tube be-
5
8
/ -in. OD copper tube
5
8
5 / -in. OD copper tube be-
8
FILTER
DRIER
LIQUID LINE
FOR 1 AND 3
LIQUID LINE
FOR 2 AND 4
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