Condensate Drain Lines; Ductwork - Goodman AVPTC42D14 series Installation & Operating Instructions Manual

8. Replace access panels, suction line grommet, insulation and all screws.
8

Condensate Drain Lines

The coil drain pan has a primary and a secondary drain with 3/4" NPT female connections. The connectors required are 3/
4" NPT male, either PVC or metal pipe, and should be hand tightened to a torque of no more than 37 in-lbs. to prevent
damage to the drain pan connection. An insertion depth of approximately 3/8" to 1/2" (3-5 turns) should be expected at this
torque.
1. Ensure drain pan hole is not obstructed.
2. To prevent potential sweating and dripping on to finished space, it may be necessary to insulate the condensate drain
line located inside the building. Use Armaflex
A secondary condensate drain connection has been provided for areas where the building codes require it. Pitch all drain
lines a minimum of 1/4" per foot to provide free drainage. Provide required support to the drain line to prevent bowing. If the
secondary drain line is required, run the line separately from the primary drain and end it where condensate discharge can
be easily seen.
NOTE: Water coming from secondary line means the coil primary drain is plugged and needs immediate attention.
Insulate drain lines located inside the building or above a finished living space to prevent sweating. Install a condensate trap
to ensure proper drainage.
NOTE: When units are installed above ceilings, or in other
locations where damage from condensate overflow may
occur, it is MANDATORY to install a field fabricated auxiliary
drain pan under the coil cabinet enclosure.
The installation must include a "P" style trap that is located
as close as is practical to the evaporator coil. See Figure 12 for de-
tails of a typical condensate line "P" trap.
NOTE: Trapped lines are required by many local codes. In the ab-
sence of any prevailing local codes, please refer to the requirements
listed in the Uniform Mechanical Building Code.
A drain trap in a draw-through application prevents air from being
drawn back through the drain line during fan operation thus prevent-
ing condensate from draining, and if connected to a sewer line to pre-
vent sewer gases from being drawn into the airstream during blower
operation.
Field experience has shown condensate drain traps with an open ver-
tical Tee between the air handler and the condensate drain trap can
improve condensate drainage in some applications, but may cause
excessive air discharge out of the open Tee. Goodman
it due to the resulting air leakage. Regardless of the condensate drain design used, it is the installer's responsibility to ensure
the condensate drain system is of sufficient design to ensure proper condensate removal from the coil drain pan.
Use of a condensate removal pump is permitted when necessary. This condensate pump should have provisions for shut-
ting off the control voltage should a blocked drain occur. A trap must be installed between the unit and the condensate pump.
IMPORTANT NOTE: The evaporator coil is fabricated with oils that may dissolve styrofoam and certain types of plastics.
Therefore, a removal pump or float switch must not contain any of these materials.
Tip: Priming the "P" trap may avoid improper draining at the initial installation and at the beginning of the cooling season.
9

Ductwork

This air handler is designed for a complete supply and return ductwork system.
To ensure correct system performance, the ductwork is to be sized to accommodate 350-450 CFM per ton of cooling with
the static pressure not to exceed 0.5" in w.c. Refer to ACCA Manual D, Manual S and Manual RS for information on duct
sizing and application. Flame retardant ductwork is to be used and sealed to the unit in a manner that will prevent leakage.
NOTE: A downflow application with electric heat must have an L-shaped sheet metal supply duct without any outlets or
registers located directly below the heater.
9.1 Return Ductwork
DO NOT LOCATE THE RETURN DUCTWORK IN AN
AREA THAT CAN INTRODUCE TOXIC, OR OBJEC-
TIONABLE FUMES/ODORS INTO THE DUCTWORK.
®
or similar material.
CAUTION
If secondary drain is not installed, the secondary
access must be plugged.
Air Handler
POSITIVE LIQUID
SEAL REQUIRED
® does not prohibit this type of drain but we also do not recommend
Do not operate this product without all the ductwork
attached.
8
Drain
Connection
2" MIN.
AT TRAP
Figure 12
3" MIN.