8
Outside
Diameter
Recommended
Torque
No torque wrench
available
Finger tighten and
use an appropriately
sized wrench to turn
an additional:
Inches
U.S.
1/4”
15 ft.-lb.
1/4 turn
3/8”
26 ft.-lb.
1/2 turn
1/2”
41 ft.-lb.
7/8 turn
5/8”
48 ft.-lb.
1 full turn
Table 2. Flare Nut Torque Recommendations
Figure 9. Insulate Flared Connections
UNIT
BASE
INSULATE ALL FLARED CONNECTIONS
TO PREVENT CONDENSATION
1. Make a water-tight connection between the field-
provided condensate drain line and the flexible
condensate connector (5/8” I.D.).
2. See figure 10 for applications including a single unit
and a single drain. In this case, ensure that the drain
line is properly sloped (no less than 1/4 inch per foot)
and condensate lines are routed to ensure moisture is
drained away from the indoor unit.
3. Drain should be as short as possible and should
not have any droops or kinks that would restrict
condensate flow and shall be approved resistant pipe.
There must be a 2-inch space between the end
of the condensate drain and the final termination
point (ground, open drain, etc.) to ensure that the
line will drain freely.
4. After system installation is complete, the condensate
drain line must be checked for leaks. This check
is part of the commissioning sequence. If a field-
provided condensate pump has been installed, it must
be checked to ensure proper operation. This check is
part of the commissioning sequence.
Condensate Piping Connections
DRAIN LINE
3 ft. (1 m)
SUPPORT
STRAPS
Figure 10. Condensate Drain Piping
Using an External Water Level Switch
Disconnect the closed circuit loop, CN 19. Connect the
water level switch cable accessory to CN 19. See unit
wiring diagrams for location of CN 19.
The connection has 5 VDC current, do not supply field
voltage.
CAUTION
Make sure that drain piping is properly routed and
insulated in order to prevent both leaks and condensation.
Follow these instructions exactly to ensure proper
drainage and unit operation.
IMPORTANT
Drain should have a slope of at least ¼ inch per foot and
should be approved corrosion-resistant pipe. You must
confirm operation of every drain and pump in the system
as part of the commissioning procedure.
IMPORTANT
Flared connections should always be accessible and
must be insulated to prevent condensation. See Figure
9.
IMPORTANT
Support ALL piping within 12 in. (305 mm) of any
mechanical fitting such as a flared connection.
