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Hot Gas Bypass Piping and Wiring
INSTALL PIPING (See Fig. 112)
WARNING
Shut off all power to the unit and remove refrigerant charge
using an approved refrigerant recovery device before proceed-
ing with installation.
1. In applications where the air handler refrigerant distribu-
tor is not equipped with a side outlet connection, it is rec-
ommended that a Sporlan in-line auxiliary side
connector with standard distributor be used. Refer to the
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 1/4-in. NPT to 1/4-in. flare fitting
on the gage connection port of the compressor suction
service valve.
LEGEND
TXV — Thermostatic Expansion Valve
Fig. 111 — Row-Split Coil Manifolding (Typical)
143
3. Sweat the pilot solenoid valve supplied in the hot gas
accessory package directly to the hot gas bypass valve on
the 3/8-in. ODF external equalizer port.
4. Install field-supplied 1/4-in. copper tube (flared with a nut
on each end) between the compressor suction valve and
the hot gas pilot solenoid valve.
5. Connect a field-supplied 5/8-in. OD copper tube between
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 5/8-in. OD copper tube
between the manual shutoff valve outlet and the hot gas
bypass valve inlet.
7. Connect a field-supplied 5/8-in. OD copper tube between
the leaving side of the hot gas bypass valve and the Spor-
lan auxiliary side connector (distributor-side connector).
8. Refer to Hot Gas Bypass installation instructions for
wiring information.
a39-4295
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