9
OUTDOOR AIR VENTILATION
The vent will provide up to 65 cfm of fresh air.
A07550
Outdoor Air Ventilation
BI--DIRECTIONAL DISCHARGE
GRILLE
The discharge grille is constructed of durable
polycarbonate and is reversible. Air flows upward at a
40 degree angle to the floor but can easily be adjusted
to an 80 degree angle to the floor.
Air discharge upward
Air discharge outward (Default)
A07550
Reversible Polycarbonate Discharge Grille
DIGITAL KEYPAD AND
ELECTRONIC DISPLAY
The digital keypad provides a simple to operate
control. The large, easy to press, “On/Off”, “Fan
Speed”, “Mode”, “Setpoint Up” and “Setpoint Down“
buttons make the control easy to operate. LEDs are
used to show the operating conditions selected.
Large numbers are used to display the Setpoint, and if
configured, room air temperature.
A07632
Electronic Display
SYSTEM CONFIGURATION
There are many different configuration possibilities,
through both dip switches and the digital keypad, that
allow you to configure the unit for your exact
application. See Owner’s Manual for more detailed
information.
Electric heat only (for Heat Pumps)
Wall Thermostat enable
Fan CON/CYC for heating
Fan CON/CYC for cooling
Setpoint Limit 1
Setpoint Limit 2
Freeze guard
Dipswitch
UP
Down
A07072
Dip Switches
GA
The unique vent system is activated by a two-
position control. Fresh outside air is redirected by
the vent door to the indoor room. A molded plastic
filter prevents dirt and debris from entering the
room side of the unit. The vent mechanism is made
from non corrosive material ensuring reliable
operation. Amagnet on the door and high-pressure
airflow create a tight, draft free seal when the vent
door is closed.
5
APPLICATION CONSIDERATIONS
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
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,
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,
dehumidification, or heating. Sources of air
infiltration include vents, gaps around windows and
doors, and improperly sealed floors, ceilings or wall
joints.
GA
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
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.
