12
Refrigerant Piping Connections
Field provided piping consists of two HVAC/R rated copper
lines connected to the indoor unit.
Final equipment connections must be brazed connections.
Compression or other types of fittings are not permitted for
final connections.
Size (Btuh)
Liquid Line
Vapor Line
VVCB012
1/4”
1/2”
VVCB018-054
3/8”
5/8”
VVCB060
3/8”
7/8”
Table 2. Refrigerant Piping Connections
IMPORTANT
The compressor in the unit this air handler is matched
with contains PVE oil (Polyvinyl ether). PVE oil is
formulated for hydrofluorocarbon (HFC) refrigerants,
such as R410A, which this system contains. While it may
have some miscibility properties with mineral-based oil
and POE oil (Polyolester), it is not recommended to mix
PVE oil with any other type of refrigerant oil.
Refrigerant leaks are unlikely; however, if a refrigerant
leak occurs, open a door or windows to dilute the
refrigerant in the room. Turn off the unit and all other
appliances that may cause a spark. Call a licensed
professional HVAC technician (or equivalent) to repair
the leak.
Use only R410A refrigerant to charge this system. Use
of other refrigerant or gas will damage the equipment.
Do not allow air or other contaminants to enter system
during installation of refrigerant piping. Contaminants
will result in lower system capacity and abnormally high
operating pressures and may result in system failure or
explosion.
Insulate all refrigerant piping.
Refrigerant pipes may be very hot during unit operation.
Do not allow contact between wiring and bare copper
pipes.
After refrigerant piping connections have been
completed, check the system for leaks per commissioning
instructions.
WARNING
