Aire-Flo 4AC14L60P 설치 지침 매뉴얼 - 페이지 3

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STEP 2 – REFRIGERANT PIPING – Flushing

Existing Line Set and Indoor Coil

IMPORTANT

If this unit is being matched with an approved line set

or indoor unit coil that was previously charged with

mineral oil, or if it is being matched with a coil which

was manufactured before January of 1999, the coil and

line set must be flushed prior to installation. Take care to

empty all existing traps. Polyol ester (POE) oils are used

in units charged with HFC-410A refrigerant. Residual

mineral oil can act as an insulator, preventing proper

heat transfer. It can also clog the expansion device

and reduce system performance and capacity. Failure

to properly flush the system per this instruction and the

detailed Installation and Service Procedures manual will

void the warranty.

Flush the existing line set per the following instruc-

tions. For more information, refer to the Installation

and Service Procedures manual. CAUTION - DO NOT

attempt to flush and re-use existing line sets or indoor

coil when the system contains contaminants (i.e.,

compressor burn out).

If a new line set is being installed, size the piping per table 2.

NOTE - When installing refrigerant lines longer than 50

feet, refer to the Refrigerant Piping Design and Fabrica-

tion Guidelines manual or contact the Technical Support

Department Product Application group for assistance.

NOTE - For new or replacement line set installation, refer

to Service and Application Note - Corp. 9112-L4 (C-91-4).

WARNING

When using a high pressure gas such as

nitrogen to pressurize a refrigeration or air

conditioning system, use a regulator that can

control the pressure down to 1 or 2 psig (6.9

to 13.8 kPa).

WARNING

Refrigerant can be harmful if it is inhaled. Refrigerant

must be used and recovered responsibly.

Failure to follow this warning may result in personal

injury or death.

Fire, Explosion and Personal Safety hazard.

Failure to follow this warning could result in

damage, personal injury or death.

Never use oxygen to pressurize or purge

refrigeration lines. Oxygen, when exposed

to a spark or open flame, can cause fire and/

or an explosion, that could result in property

damage, personal injury or death.

Polyol ester (POE) oils used with HFC-410A refrigerant

absorb moisture very quickly. It is very important that the

refrigerant system be kept closed as much as possible.

DO NOT remove line set caps or service valve stub caps

until you are ready to make connections.

LIQUID LINE FILTER DRIER INSTALLATION

4AC14L(S)36 to 60 Units only.

NOTE – The 4AC14LS18 to 30 units have a factory in-

stalled suction filter drier. A liquid line filter drier is not re-

quired on the 4AC14LS18 to 30 units.

The liquid line filter drier, when provided, must be field in-

stalled in the liquid line between the outdoor unit's liquid

line service valve and the indoor coil's metering device

(fixed orifice or TXV) as illustrated in figure 4. This filter

drier must be installed to ensure a clean, moisture-free

system. Failure to install the liquid line filter drier, when

provided, will void the warranty. A replacement filter drier

is available. See Brazing Connections page 6 for special

procedures on brazing filter drier connections to the liquid

line.

LIQUID LINE

SERVICE VALVE

OUTDOOR

UNIT

(Not required on 4AC14LS18 - 30 units.)

FIGURE 4. Typical Liquid Line Filter Drier Installation

FIXED ORIFICE (RFC) LIQUID LINE SOLENOID

VALVE INSTALLATION

4AC14LS18 to 30 units equipped with a fixed orifice (RF-

CIV) metering device require installation of liquid line so-

lenoid valve kit #17A09. Refer to liquid line solenoid valve

kit installation instructions 507807-01.

Page 3

WARNING

BRAZE CONNECTION POINTS

LINE

LIQUID LINE

FILTER DRIER

4AC14L(S)36 - 60 units only.

LIQUID

LINE