Table of Contents
Advertisement
CAUTION!
THE DEHUMIDIFIER IS SHIPPED FROM THE FACTORY PRESSURIZED WITH A CHARGE OF
INERT GAS AND WITH RUBBER PLUGS IN THE LINES. PURGE THE INERT GAS FROM THE
DEHUMIDIFIER BY REMOVING THE RUBBER PLUGS IN THE LIQUID AND GAS LINES TO
RELEASE THE INERT GAS BEFORE CONNECTING THE LINE SET.
Note: If there is no pressure in the dehumidifier when the first plug is removed, check the dehumidifier for
damage and leaks before continuing with the installation.
Use the following procedure to connect the line set to the Dehumidifier:
1. Purge the inert gas from the dehumidifier by removing the rubber plugs in the liquid and gas lines to release
the inert gas before connecting the line set.
2. Place a field-provided heat shield, such as a wet rag, against the dehumidifier and around the piping stubs.
The heat shield must be in place to protect the cabinet from heat damage.
3. Swage the liquid and gas lines (if necessary) to fit onto the dehumidifier lines.
4. Purge the dehumidifier lines and the line set with dry nitrogen (Inert gas) to prevent oxidation during brazing.
Flow dry nitrogen into the lines at a low pressure of 1 to 2 psig.
5. Braze the line set lines to the dehumidifier lines.
6. Remove the heat shield after brazing and allow the connections to cool.
Use the following procedure to connect the line set to the Condensing Unit:
1. Cut the line set lines to the proper required length. Deburr the cut ends of the line set lines.
2. Fit the line stubs with flare fittings (included with the condensing unit) onto the line set if necessary.
3. Swage the liquid and gas lines (if necessary) to fit onto the line stubs with the flare fittings.
4. Remove service valve caps and cores.
5. Purge the lines with dry nitrogen (Inert gas) to prevent oxidation during brazing.
6. Braze the line set lines to the line stubs.
7. Apply a light coating of refrigeration oil to the flare fitting threads on the condensing unit valves.
8. Start each flare nut on the corresponding flare fitting on the condensing unit valves by hand, making sure the
threads are properly engaged. Tighten the flare nuts hand tight.
9. Carefully torque the flare nuts to the corresponding flare fittings on the condensing unit valves.
• Torque the liquid line flare
nut to 13.3 ft-lbs.
• Torque the suction line
flare nut to 30.1 ft-lbs.
10. Reinstall service valve
cores and caps.
Note: Alternately, the stubs with
the flare fittings can be connected
to the condensing unit before
brazing the line set. In this case
a field provided heat shield, such
as a wet rag, must be placed over
the flare fittings and valves on the
condensing unit to protect them
from heat damage. The service
valve cap and core should be
removed before brazing near
stub tubes.
www.Ultra-Aire.com | (800) 533-7533
LINE SET INSTALLATION
3-WAY VALVE
2-WAY VALVE
Ultra-Aire SD12 Installation Instructions
GAS LINE
STUB
LIQUID LINE STUB
SERVICE VALVE CAPS
VALVE ROD CAPS
VALVE STEMS
15
Advertisement
Table of Contents
