20
Enertech Global
IOM, BS/BT Models
Section 5: Line Set Installation
Figure 3: Compressor section above air
handler
Notes:
•
A crankcase heater and Bi-flow liquid line
solenoid valve are required if total equivalent
length is greater than or equal to 50 feet or the
vertical separation is greater than or equal to 10
feet. (See table 5 for part numbers)
•
Vapor line P-traps should be installed at the
outlet of the air handler and just before the
compressor section.
•
75 feet maximum equivalent line length.
•
10 feet maximum vertical separation.
•
Vapor line sizes on Two-Stage units should NOT
be increased due to the velocity requirements
for returning oil to the compressor.
Figure 4: Horizontal piping above air handler
Notes:
•
A crankcase heater and Bi-flow liquid line
solenoid valve are required if total equivalent
length is greater than or equal to 50 feet or the
vertical separation is greater than or equal to 20
feet.
(See table 5 for part numbers)
•
The vapor line must be installed with the
horizontal run higher than the top of the
evaporator section.
•
Vapor line P-traps should be installed at the
outlet of the air handler and at the bottom of the
vapor line drop.
•
75 feet maximum equivalent line length.
•
20 feet maximum vertical separation.
•
Vapor line sizes on Two-Stage units should NOT
be increased due to the velocity requirements
for returning oil to the compressor.
Figure 5: Horizontal piping above A-Coil
Notes:
•
A crankcase heater and Bi-flow liquid line
solenoid valve are required if total equivalent
length is greater than or equal to 50 feet or the
vertical separation is greater than or equal to 20
feet. (See table 5 for part numbers)
•
The vapor line must be installed with the
horizontal run higher than the top of the
evaporator section.
•
Vapor line P-traps should be installed at the
outlet of the evaporator and at the bottom of the
vapor line drop.
•
75 feet maximum equivalent line length.
•
20 feet maximum vertical separation.
•
Vapor line sizes on Two-Stage units should NOT
be increased due to the velocity requirements
for returning oil to the compressor.
⚠
WARNING
⚠
IF USING A DUAL FUEL APPLICATION,
A-COIL MUST BE INSTALLED ON
THE OUTLET OF THE FURNACE.
INSTALLATION ON THE RETURN COULD
CAUSE FURNACE HEAT EXCHANGER
FAILURE, AND MAY VOID FURNACE
WARRANTY.