Condensate Drain Connections; Vapor Line Grommet - York AVV25B Installation Manual

10. Refer to Outdoor unit Installation Manual, and accomplish evacua-
tion, leak check and charging instructions. Check all field brazed
joints and metering device connections.
11. Attach the coil access panel to the cabinet.
12. Ensure lines are sound isolated by using appropriate hangers or
strapping.
FIGURE 10: Vapor Line Grommet
Johnson Controls Unitary Products
SECTION VII: CONDENSATE DRAIN
CONNECTIONS
All drain lines should be trapped a minimum of three inches, should be
pitched away from unit drain pan and should be no smaller than the coil
drain connection.
CAUTION
!
TM
DO NOT use Teflon tape, pipe thread compound, or other
sealants. The use of a sealant may cause damage and premature
failure of the drain pan.
Threaded drain connection should be hand-tightened, plus no more
than 1 turn.
Avoid Double Trapping of a single drain line.
Route the drain line so that it does not interfere with accessibility to the
coil, air handling system or filter and is not exposed to freezing
temperatures. See Figures 18 and 19 for drain connection locations.
CAUTION
!
When the unit is installed in an attic or above a finished ceiling, an
auxiliary drain pan should be provided under the coil as specified by
most local building codes. When this exterior secondary drain pan is
used that drain should be piped to a location that will give the occu-
pant a visual warning that the primary drain is clogged.
Drain plugs can be removed using a standard 3/8 inch drive socket set
ratchet.
If the coil is provided with a secondary drain it should be piped to a
location that will give the occupant a visual warning that the primary
drain is clogged. If a secondary drain is not used it must be plugged.
Instruct the owner that the evaporator coil drain pan should be
inspected and cleaned regularly to prevent odors and assure proper
drainage. If a secondary drain is not used it must be plugged. See
Figures 18 and 19.
Coils should be installed level or pitched slightly toward the drain end.
Suggested pitch should not exceed 1/4 inch per foot of coil.
The drain pan connections are designed to ASTM Standard D 2466
Schedule 40. Use 3/4" PVC or steel threaded pipe. Since the drains are
not subject to any pressure it is not necessary to use Schedule 40 pipe
for drain lines.
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