PMGB0406B rev.1
18
7. Condensate Drain Connections
Trap all drain lines a minimum of three inches, pitch them away from unit drain pan, and ensure they are not
smaller than the coil drain connection.
DO NOT use Te
À
on™ 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, 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
¿
lter and
will not be exposed to freezing temperatures. See Figures 12 & 13 for drain connection locations.
When the unit is installed in an attic or above a
¿
nished ceiling, an auxiliary drain pan should be provided under
the coil as speci
¿
ed 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 occupant a visual warning that the primary drain is clogged.
If the coil is provided with a secondary drain pipe it 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 12 & 13.
Install coils 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.
8. Electric Heater Installation
If the air handler requires electric heat, install the electric heat kit according to the installation instructions
included with the kit. After installing the kit, mark the air handler nameplate to designate the heater kit that was
installed. If no heater is installed, mark the name plate appropriately to indicate that no heat kit is installed.
Use only 6HK Revision C or later heater kits, as listed in this manual. Use data from Tables 4 through 8 for
information on required minimum motor speed tap to be used for heating operation, maximum over-current
protection device required as listed for combination of air handler and heater kit.
For Up
À
ow, Down
À
ow and Horizontal left-hand applications, install the kits without modi
¿
cation.
Field modi
¿
cation is required for Horizontal right-hand air
À
ow applications only. Follow instructions with heater
for modi
¿
cation.
NOTICE
In some horizontal applications, the service disconnects on the electric heat kits must be rotated 180° so the
up position of the disconnect is in the ON position. This service disconnect orientation change is required by
UL1995, Article 26.19 (in reference to all circuit breakers).
Refer to the Cautions section 23 for Heater Kit wiring information.
(Ins)DX-Kit̲4e-rev1.indd C-18
(Ins)DX-Kit̲4e-rev1.indd C-18
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2016/11/25 15:32:45
