Carrier 52M Performance Series Manual de usuario descargar pdf (Pagina 19)

FIELD--INSTALLED ACCESSORIES (CONT.)

OUTDOOR GRILLE SELECTION

IMPORTANT: If you wish to use a grille not made

for the Gree GA series contact Gree Application

Engineering.

The following guidelines must be followed in the

initial selection of any alternate exterior grille or

louver:

1. The louver must haveaminimum of 65% free

area. Free area is the minimum area of the

opening in an air inlet or outlet in which air can

pass. Free Area (%) = X/Y.

2. The louver should be attached to the wall sleeve

in a manner that will prevent recirculation of

condenser discharge air into the inlet. In most

applications, baffles, splitters, and/or gasket

will be required between the chassi

s tube end

sheets and the louver to prevent air

recirculation.

The above criteria must be followed, since a louver

that is restrictive or allows re--circulation will result

in a reduction of the unit’s capacity and efficiency

and will ultimately shorten the compressor life.

Lo uver Dimensional Reference

Sample Calculations

Free Area (%) =

x 100

x = 1

y = 1.5

F.A. (%) =

x 100 = 66.7%

1.5

Hardwire Kit

Part No.: HARDWIRE-KIT-15A

HARDWIRE-KIT-20A

HARDWIRE-KIT-30A

This accessory hardwire kit provides a permanent

connection to the unit. Electrical hard wiring is

required when NEC (National Electrical Code) or

local codes restrict the use of power cord and plug

connections. The hardwire kit easily mounts on the

front right side of the unit and comes with 36 inches

(914.4 mm) of flexible steel conduit.

A07381

Hardwir e Kit

Conduit Interface Kit

Part No.: CONDUIT-KIT-15A

CONDUIT-KIT-20A

CONDUIT-KIT-30A

The conduit interface accessory kit provides an easy

wire connection to the unit to interface to existing

field--supplied conduit.

A07810

Conduit Interface Kit

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

ordertoachievethedesiredtemperatureandhumidity

levels within the space to be conditioned. It is

strongly recommended that a professional engineer

match thePTAC unitswiththebuilding structureand

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 spac

e down to the desired

temperatureduringveryhotdays. Theresult couldbe

warm and humidor warm and dry conditionedspace.

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 beacool, yet

excessively humid, space.

Air Infiltration

Excessive air infiltration can intensify problems

associated with undersizing or oversizing a PTAC

unit. This can be the ca

use 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.

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.

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