Aire-Flo 41 Panduan Petunjuk Instalasi - Halaman 5

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STEP 2 -- REFRIGERANT PIPING -- Removing Existing Indoor Metering Device

TYPICAL EXISTING FIXED ORIFICE

REMOVAL PROCEDURE

(UNCASED COIL SHOWN)

DISTRIBUTOR TUBES

LIQUID LINE ORIFICE HOUSING

DISTRIBUTOR

ASSEMBLY

REMOVE AND DISCARD

WHITE TEFLON

(IF PRESENT)

A - On fully cased coils, remove the coil access and plumbing panels.

B - Remove any shipping clamps from the liquid line and distributor as

sembly.

C - Using two wrenches, disconnect liquid line from liquid line orifice hous

ing. Take care not to twist or damage distributor tubes during this pro

cess.

D - Remove and discard fixed orifice, valve stem assembly (if present)

and Teflon

washer as illustrated above.

E - Use a field-provided fitting to temporarily reconnect the liquid line to the

indoor unit's liquid line orifice housing.

CONNECT GAUGES AND EQUIPMENT FOR

FLUSHING PROCEDURE

CYLINDER CONTAINING

CLEAN HCFC-22* TO BE

USED FOR FLUSHING

(Positioned to deliver liquid

refrigerant)

SUCTION LINE

SERVICE VALVE

EXISTING

INDOOR

UNIT

LIQUID LINE SERVICE

VALVE

RECOVERY

CYLINDER

A - HCFC-22 cylinder with clean refrigerant* (positioned to deliver liquid

refrigerant) to the suction service valve.

B - HCFC-22 gauge set (low side) to the liquid line valve.

C - HCFC-22 gauge set center port to inlet on the recovery machine with an

empty recovery tank connected to the gauge set.

D - Connect recovery tank to recovery machine per machine instructions.

*IMPORTANT - Clean refrigerant is any refrigerant in a system that has not had compressor burn out. If the system

has experienced burn out, it is recommended that the existing line set and indoor coil be replaced.

TEFLON

RING

FIXED ORIFICE

BRASS NUT

SEAL

LIQUID LINE ASSEMBLY

(INCLUDES STRAINER)

GAUGE

MANIFOLD

LOW

NEW

OUTDOOR

UNIT

OPENED

CLOSED

TANK

RETURN

INLET

DISCHARGE

RECOVERY MACHINE

TYPICAL EXISTING EXPANSION VALVE REMOVAL

PROCEDURE (UNCASED COIL SHOWN)

TWO-PIECE PATCH PLATE

LIQUID LINE

(UNCASED COIL ONLY)

DISTRIBUTOR

TUBES

DISTRIBUTOR

ASSEMBLY

MALE EQUALIZER

LINE FITTING

SENSING BULB

A - On fully cased coils, remove the coil access and plumbing panels.

B - Remove any shipping clamps from the liquid line and distributor

assembly.

C - Disconnect the equalizer line from the check expansion valve

equalizer line fitting on the suction line.

D - Remove the suction line sensing bulb.

E - Disconnect the liquid line from the check expansion valve at the

liquid line assembly.

F - Disconnect the check expansion valve from the liquid line orifice

housing. Take care not to twist or damage distributor tubes during

this process.

G - Remove and discard check expansion valve and the two Teflon

HIGH

rings.

H - Use a field-provided fitting to temporarily reconnect the liquid line

to the indoor unit's liquid line orifice housing.

FLUSHING LINE SET

The line set and indoor unit coil must be flushed with at least the same

amount of clean refrigerant* that previously charged the system.

Check the charge in the flushing cylinder before proceeding.

A - Set the recovery machine for liquid recovery and start the

recovery machine. Open the gauge set valves to allow the

recovery machine to pull a vacuum on the existing system line

set and indoor unit coil.

B - Position the cylinder of clean HCFC-22* for delivery of liquid

refrigerant and open its valve to allow liquid refrigerant to flow

into the system through the suction line valve. Allow the

refrigerant to pass from the cylinder and through the line set and

the indoor unit coil before it enters the recovery machine.

C - After all of the liquid refrigerant has been recovered, switch the

recovery machine to vapor recovery so that all of the HCFC-22

vapor is recovered. Allow the recovery machine to pull the

system down to 0.

D - Close the valve on the inverted HCFC-22 drum and the gauge

set valves. Pump the remaining refrigerant out of the recovery

machine and turn the machine off.

FIGURE 6

Page 5

STUB END

ORIFICE

EXPANSION

HOUSING

VALVE

TEFLON

RING

EQUALIZER

LINE

LIQUID LINE

ASSEMBLY WITH

BRASS NUT

SUCTION

LINE

TEFLON

RING

SENSING

LINE

LIQUID

LINE