Duct Work; Filters; Piping; Condensate Drain - Goodman GPH1524M41 Installation Manual

Duct Cover Installation
Down Discharge Applications
Cut insulation around bottom openings and remove panels
from the bottom of the unit, saving the screws holding the
panels in place.
NOTE: Single phase models require installation of
horizontal duct kit #20464501PDGK (medium chassis) and
#20464502PDGK (large chassis).
D
UCT WORK
Duct systems and register sizes must be properly designed for
the C.F.M. and external static pressure rating of the unit. Duct work
should be designed in accordance with the recommended methods
of Air Conditioning Contractors of America Manual D (Residential)
or Manual Q (Commercial). All ductwork exposed to the outdoors
must include a weatherproof barrier and adequate insulation.
A duct system should be installed in accordance with Standards of
the National Board of Fire Underwriters for the Installation of Air
Conditioning, Warm Air Heating and Ventilating Systems. Pamphlets
No. 90A and 90B.
The supply duct from the unit through a wall may be installed with-
out clearance. However, minimum unit clearances as shown in the
appendix must be maintained. The supply duct should be provided
with an access panel large enough to inspect the air chamber down-
stream of the heat exchanger. A cover should be tightly attached to
prevent air leaks.
For duct flange dimensions on the unit refer to the Unit Dimension
illustration in the appendix.
For down-discharge applications, the ductwork should be attached
to the roof curb prior to installing the unit. Duct work dimensions are
shown in the roof curb installation manual.
If desired, supply and return duct connections to the unit may be
made with flexible connections to reduce possible unit operating
sound transmission.
F
ILTERS
T
O PREVENT PROPERTY DAMAGE DUE TO FIRE AND LOSS OF
EQUIPMENT EFFICIENCY OR EQUIPMENT DAMAGE DUE TO DUST AND LINT
BUILD UP ON INTERNAL PARTS, NEVER OPERATE UNIT WITHOUT AN AIR
FILTER INSTALLED IN THE RETURN AIR SYSTEM.
Return
Supply
Remove these panels
for downflow duct
applications
CAUTION
Filters are not provided with unit and must be supplied and exter-
nally installed in the return duct system by the installer. A field-
installed filter grille is recommended for easy and convenient ac-
cess to the filters for periodic inspection and cleaning. When in-
stalling filters, ensure the air flow arrows on the filter are pointing
toward the circulator blower.
Refer to the unit filter size chart below for filter size information.
MINIMUM FILTER SIZE
NOMINAL SIZE (INCHES)
10x20
14x20
14x25
15x20
16x20
16x25
20x20
20x25
25x25
NOTE: Filters must have adequate face area for the rated quantity
of the unit. See the air delivery table below for recommended filter
size. Size the filters in accordance with their manufacturer recom-
mendations. Throwaway filters must be sized for a maximum face
velocity of 300 feet per minute.
7
6
5
4
3
2
500 1000 1500
C D
ONDENSATE RAIN
The condensate drain connection of the evaporator is a half cou-
pling of ¾" N.P.T. A trap must be provided to have Proper conden-
sate drainage.
Unit
Drain
Connection
Flexible
Tubing-Hose
Or Pipe
Install condensate drain trap as shown. Use ¾ " drain connection
size or larger. Do not operate without trap. Unit must be level or
slightly inclined toward drain.
NOTE: All wiring should be made in accordance with the National
Electrical Code.
Consult your local Power Company to determine the availability of
sufficient power to operate the unit. Check the voltage, frequency,
and phase at the power supply to ensure it corresponds to the unit's
RATED VOLTAGE REQUIREMENT.
6
NOMINAL AREA (SQ. FT.)
1.4
1.9
2.4
2.1
2.2
2.8
2.8
3.5
4.3
2000 2500 3000
Airflow - SCFM

PIPING

2" Minimum
3" Minimum
A Positive Liquid Seal
Is Required
WIRING
3500