Refrigerant Line Sets: Installing Vertical Runs (new construction shown)
NOTE: Similar installation practices | Outside Wall | |
| ||
should be used if line set is to be | Wood Block | |
installed on exterior of outside wall. | ||
Between Studs | ||
|
Vapor Line Wrapped with Armaflex
Liquid Line
Outside Wall
IMPORTANT:
Refrigerant lines must not contact structure.
Caulk
IMPORTANT: Refrigerant lines must not contact wall.
Vapor Line Liquid Line
Wire Tie
Inside Wall
Strap
Sleeve
Wire Tie
Wood Block
Wire Tie
Strap
PVC Pipe Fiberglass
Insulation
Sleeve
Figure 7
Flushing Existing Line Set and Indoor Coil
This procedure should not be performed on systems which contain contaminants, such as compressor burn out.
CAUTION
When flushing existing line set and/or indoor coil, be sure to empty all existing traps. Residual mineral oil can act as an insulator, preventing proper heat transfer. It can also clog the thermal expansion valve, reducing system performance and capacity. Failure to properly flush system as explained in these instructions will void warranty.
Required Equipment
The following equipment is needed to flush the existing line set and indoor coil (see Figure 8 on page 8): Two clean R22 recovery bottles, an
with a “pump down” feature, and two sets of gauges (one for use with R22 and one for use with R410A).
Flushing Procedure
IMPORTANT: The line set and/or indoor coil must be flushed with at least the same amount of refrigerant that previously charged the system. Check the charge in the flushing cylinder before flushing the unit.
1.Remove existing R22 refrigerant using the appropriate procedure.
If the existing outdoor unit is not equipped with shutoff valves, or if the unit is not operational AND the existing
R22 refrigerant will be used to flush the system:
Disconnect all power to the existing outdoor unit. Connect the existing unit, a clean recovery cylinder, and the recovery machine according to the instructions provided with the recovery machine. Remove all R22 refrigerant from the existing system. Refer to the gauges after shutdown to confirm that the entire system is completely void of refrigerant. Disconnect the liquid and suction lines from the existing outdoor unit.
Issue 1004 | Page 7 |
