Gree GA Series Product Data page 29

DIMENSIONAL DRAWINGS AND INSTALLATION DATA - -
APPLICATION CONSIDERATIONS
NEW CONSTRUCTION (CONT.)
Installation instructions are shipped with all PTAC
units. It is important that air conditioning systems be
TYPICAL SUBBASE INSTALLATION
properly sized and installed for each application in
order to achieve the desired temperature and humidity
levels within the space to be conditioned. It is
strongly recommended that a professional engineer
match the PTAC units with the building structure and
climate.
The following application considerations are all
important in choosing the proper PTAC system for
the building structure.
Undersizing
If a PTAC unit is undersized (cooling capacity is less
than required load for an application), the unit
will not be able to cool the space down to the desired
OUTSIDE
WALL
temperature during very hot days. The result could be
SEE
warm and humid or warm and dry conditioned space.
NOTES
Oversizing
If a PTAC unit is oversized (cooling capacity is
greater than required load for the specific application),
SIDE
the unit will cool the space down to the desired
desired temperature too quickly.
The unit will cycle on and off, however,
dehumidification only takes place when the unit is
operating. The result of this type of application in a
hot and/or humid climate would be a cool, yet
excessively humid, space.
Air Infiltration
ACCESSORY DRAIN
Excessive air infiltration can intensify problems
(EXTERNAL OR INTERNAL)
associated with undersizing or oversizing a PTAC
unit. This can be the cause of insufficient cooling,
NOTES:
dehumidification, or heating. Sources of air
1. Accessory subbase is required for applications where:
- Wall sleeve extends 4 inches (101.6 mm) or more into the room.
infiltration include vents, gaps around windows and
- Wall thickness is less than 2 inches (50.8 mm).
- All 265-v cord-connected applications.
doors, and improperly sealed floors, ceilings or wall
2. For all applications with an accessory subbase:
-
joints. Wall sleeve must extend 4 in. (101.6 mm) into the room and 3-1/4 in. (82.6 mm)minimum above the floor
-
Subbase height is adjustable from 3-1/4 in. (82.6 mm) to 5-1/2 in. (139.7 mm) maximum above floor (including carpeting).
Refer to wall sleeve installation instructions.
0'-0 7/8"
(22)
SUBBASE ACCESS COVERS
(3) 7/8" (22.2)
DIA. KNOCKOUTS
SUBBASE LEVELING BOLTS
Condensate Removal
Gree's GA series has a new condensate (water)
disposal system. The outdoor fan prop has a built in
slinger ring which draws condensate water through a
suction port built into the outdoor coil shroud. The
water passes though the suction port and is sprayed
on the warm outdoor coil for evaporation. Thus
providing better disposal of excess condensate and
0'-3 1/4" MIN. (83)
improving unit operating efficiency.
0'-5 1/2" MAX. (140)
It is normal and desirable to have some condensate
water in the ebase pan to boost operating efficiency.
NOTE: This unit will not always evaporate 100%
of the unit generated condensate and blown in
rain water. If it is necessary to control 100% of
the condensate, the Drain Kit (Part No.: DRAIN-
KIT-4PK) and a building condensate drain
system is recommended.
1 9/16"
(39.7)
(3) 1 1/8" (28.6) DIA.
KNOCKOUTS
17"
(431.8)
REAR VIEW
ACCESSORY SUBBASE
ELECTRICAL CONNECTIONS
29
5
19 1/2"
(495.3)
A07389