Figure 9: Braze Instructions
Fully Insulated
Suction Line
Fully Insulated
Liquid Line
Nitrogen Braze
Position
Description
System
Service
Port
CCW - Full Out
CCW - Full Out 1/2 turn CW
CCW - Full In
Operation Position
Service Position
Shipping Position
Open
Open
Open
Open
Closed
Closed
Table 6: Service Valve Positions
Figure 10: Air Coil Connection
TXV (‘IN’ toward
compressor section)
Suction Line
Liquid Line
Bulb
(Must be
Installed and
Insulated)
Equalizer
Line
TXV has internal
check valve
FP2
Sensor
Fully Insulated
Suction Line
Fully Insulated
Liquid Line
Nitrogen Braze
Vapor
)XOO\,QVXODWHG
/LTXLG/LQH
)XOO\,QVXODWHG
9DSRU/LQH
Refrigeration Installation
ѥ
CAUTION!
ѥ
CAUTION!
This procedure should not be performed
on systems which contain containments (Example:
compressor burn out).
ѥ
WARNING!
ѥ
WARNING! If at all possible, it is recommended that a
new line set be used when replacing an existing R-22
system with an HFC-410A system. In rare instances
where replacing the line set is not possible, the line set
must be
Å
ushed prior to installation of the HFC-410A
system. It is also important to empty all existing traps.
Polyolester (POE) oils are used in units charged with
HFC-410A refrigerant. Residual mineral oil can act as an
insulator on the wall of the coil tubing, hindering proper
heat transfer and thus reducing system ef
Ä
ciency and
capacity. Another important reason to thoroughly
Å
ush
the line set is remove any trash and other contaminants
that may be present which could clog the thermal
expansion valve.
Failure to properly
Å
ush the system per the instructions
below will void the warranty.
ѥ
WARNING!
ѥ
WARNING! The Environmental Protection Agency
prohibits the intentional venting of HCFC and HFC
refrigerants during maintenance, service, repair and
disposal of appliance. Approved methods of recovery,
recycling or reclaiming must be followed.
19
R e s i d e n t i a l S p l i t U n i t s - 6 0 H z P u r o n
®
R e v. : 6 D e c . , 2 0 1 1
Re-Using Existing Line Set - R-22 to Puron
®
Conversion
New line sets are always recommended, but are required if;
• The previous system had a compressor burn out.
• The existing line set has oil traps.
• The existing line set is larger or smaller than the
recommended line set for the Puron
®
system.
• The existing line set is damaged, corroded, or shows signs
of abrasion/fatigue
Required Equipment
The following equipment will be required in order to
Å
ush the
indoor coil and existing line set:
• Two R-22 recovery cylinders
• Refrigerant recovery machine with a pump down feature
• Two sets of gauges (one used for R-22 and one used with
Puron
®
.
• Cylinder of clean R-22 (minimum amount required to
adequately
Å
ush shown below)
