14
Liquid Refrigerant Return Line
The liquid refrigerant return line runs between the evaporator's original liquid return angle
valve and drain back solenoid valve L3 (see Figure 1 on page 12) or the outlet of the optional
liquid line filter-drier, if used. Use 1/4" refrigerant-grade copper tubing.
NOTE
: The Liquid Refrigerant Return Line MUST connect
to the chiller evaporator ABOVE the Liquid Level.
THE
PURGE UNIT WILL NOT DRAIN PROPERLY
if the line is
connected to a point below the liquid refrigerant level
(see
illustration to the right)
.
Refrigerant Line Installation Procedure
It is recommended that the following procedures be followed when making the purge
refrigerant line connections.
Caution:
Federal Refrigerant Recycling Regulations require that the chiller, during
servicing, be either completely evacuated or pressurized to a tmospheric pressure (0
psig) prior to opening the refrigerant circuit to the atmosphere. Failure to comply, or
using means other than heat to elevate refrigerant pressure, violates Section 608 of the
Clean Air act.
1.
First, install the 1/4-inch liquid refrigerant return line. Do Not open the liquid return valve on the
evaporator at this time.
NOTE:
Avoid sagging of the tubing to insure free gravity flow of liquid refrigerant back to the
chiller.
2.
If used, install the optional liquid line filter-drier and the moisture indicating sight glass as shown
in Figure 5 on page 18. The sight glass should be installed so the viewing area is tilted slightly
downward just enough to assure liquid contact with the moisture sensing element. If not used,
connect return line direct to drain back solenoid valve L3.
3.
Install the 1/2-inch purge line (see Figure 5 on page 18) from the purge unit to the condenser
purge fitting. Start by making the connection at the purge first. Next, determine what fitting will
be used to make the connection at the condenser. Cap off the flare end of fitting with a flare
cap.
4.
Remove the existing purge solenoid valve or angle valve from the condenser purge fitting and as
quickly as possible screw in the new fitting with cap.
5.
Finally, cut the 1/2-inch purge line to the proper length. Install the 1/2-inch OD ball valve in the
1/2-inch line as close to the condenser connection as possible. Cut and flare a short section of
1/2-inch tube (approx. 4 to 6 inches long). Slip on the flare nut and sweat tube to inlet end of the
ball valve. Now again, as quickly as possible remove the flare cap from the purge outlet fitting
and connect the 1/2-inch line with ball valve.
6. Open purge isolation valves at this time.
Liquid Level
Chiller
Purger
Purge Line
Liquid Return Line
Evaporator
Condensor
Содержание Redi-Purge PRG-113-C3
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