Gree GA Series Product Data page 39

TYPICAL WIRING SCHEMATIC FOR ENERGY
APPLICATION CONSIDERATIONS
MANAGEMENT INTERFACE
Installation instructions are shipped with all PTAC
units. It is important that air conditioning systems be
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 R O O M 1 0 0
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
temperature during very hot days. The result could be
warm and humid or warm and dry conditioned space.
Oversizing
If a PTAC unit is oversized (cooling capacity is
greater than required load for the specific application),
the unit will cool the space down to the desired
desired temperature too quickly.
The unit will cycle on and off, however,
B
W
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
Excessive air infiltration can intensify problems
associated with undersizing or oversizing a PTAC
unit. This can be the cause of insufficient cooling,
PTAC #1
dehumidification, or heating. Sources of air
LEGEND
infiltration include vents, gaps around windows and
AWG --- American Wire Gage
B --- Black
doors, and improperly sealed floors, ceilings or wall
PTAC --- Packaged Terminal Air Conditioner
joints.
W --- White
NOTES:
1. To size transformer, use the following equation:
Quantity of PTAC units x 12 va = Transformer Size (va)
Example: 110 PTAC Units x 12 va = 1320 va Transformer
2. Following are recommended wire sizes:
AWG WIRE SIZE NO.
24
22
20
18
16
FRONT DESK SWITCH PANEL
R O O M 1 0 1
B
W
PTAC #2
MAXIMUM LENGTH ft (m)
400 (121.9)
600 (182.9)
900 (274.3)
1500 (457.2)
2000 (609.6)
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
R O O M N
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
improving unit operating efficiency.
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.
B
PTAC #N
39
5
FIELD-SUPPLIED
24-V
TRANSFORMER
(SEE NOTE 1)
W
A07390