Lennox VCFA012S4 Installation Instructions Manual page 10

Condensate Piping Connections
CAUTION
!
Make sure that drain piping is properly routed
and insulated in order to prevent both leaks and
condensation.
1. Make a water-tight connection between the fi eld-
provided condensate drain line and the fl exible
condensate connector (5/8" I.D.).
2. Confi rm proper slope (not less than 1/4 inch per foot)
and routing of condensate lines 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
fl ow and shall be approved resistant pipe. There must
be a 2-inch space between the end of the condensate
drain and the fi nal termination point (ground, open
drain, etc.) to ensure that the line will drain freely.
4. After the system
condensate drain line must be checked for leaks and
proper drainage. If a fi eld-provided condensate pump
has been installed, it must be checked to ensure proper
operation. This check is part of the commissioning
sequence.
VCFA
INDIVIDUAL DRAIN OUTLET FROM EACH INDOOR UNIT
Figure 11. Condensate Drain Multiple Indoor Units Suspended from Ceiling Using a Single Properly Sloped
Using an External Water Level Switch
Disconnect the closed circuit loop, CN 5. Connect the
water level switch cable accessory to CN 5. See unit wiring
diagrams for location of CN 5.
The connection has 5 VDC current, do not supply fi eld
voltage.
installation is complete,
3 ft. (1 m)
SUPPORT
STRAPS
Drain should have a slope of at least ¼ inch per foot
and should be approved corrosion-resistant pipe.
You must confi rm operation of every drain and pump
in the system as part of the commissioning proce-
dure.
VCFA
Slope at least
1/4" per foot
the
Figure 10. Single Indoor Unit Suspended from Ceiling
Using a Properly Sloped Gravity Drain
VCFA
(Sloped at 1/4" per foot AWAY from unit and should
be supported as needed to prevent sagging.)
Gravity Drain
10
IMPORTANT!
3 ft. (1 m)
SUPPORT
STRAPS
DRAIN LINE
VCFA
MAIN DRAIN