Lenox Elite Series X16 Air Conditioner Units, 506637-01 Flushing Line Set and Indoor Coil

C Disconnect the equalizer line from the check expansion valve equalizer line fitting on the vapor line.

D Remove the vapor 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® rings.

B Remove any shipping clamps holding the liquid line and distributor assembly.

Flushing Line Set and Indoor Coil

TYPICAL EXISTING FIXED ORIFICE	TYPICAL EXISTING EXPANSION VALVE REMOVAL
REMOVAL PROCEDURE (UNCASED	OR 1BPROCEDURE (UNCASED COIL SHOWN)
1A COIL SHOWN)
		STUB END
DISTRIBUTOR TUBES	TWO PIECE PATCH PLATE	LIQUID LINE	CHECK
	(UNCASED COIL ONLY)
		ORIFICE	EXPANSION
LIQUID LINE ORIFICE HOUSING
	DISTRIBUTOR	HOUSING	VALVE
TEFLON® RING	TUBES		TEFLON®
			RING
FIXED ORIFICE

BRASS NUT

DISTRIBUTOR ASSEMBLY

REMOVE AND DISCARD

WHITE TEFLON® SEAL

(IF PRESENT) LIQUID LINE ASSEMBLY (INCLUDES STRAINER)

AOn fully cased coils, remove the coil access and plumbing panels.

BRemove any shipping clamps holding the liquid line and distributor as- sembly.

CUsing two wrenches, disconnect liquid line from liquid line orifice hous- ing. Take care not to twist or damage distributor tubes during this pro- cess.

TEFLON®

RINGSENSING

LINE

DISTRIBUTOR EQUALIZER

ASSEMBLY LINE

LIQUID LINE

ASSEMBLY WITH

BRASS NUT

MALE EQUALIZER
LINE FITTING	VAPOR
		LIQUID
SENSING BULB	LINE
		LINE

D Remove and discard fixed orifice, valve stem assembly if present and A On fully cased coils, remove the coil access and plumbing panels. Teflon® washer as illustrated above.

E Use a field−provided fitting to temporary reconnect the liquid line to the indoor unit’s liquid line orifice housing.

2CONNECT GAUGES AND EQUIPMENT FOR FLUSHING PROCEDURE

INVERTED HCFC−22	GAUGE
CYLINDER CONTAINS	MANIFOLD
CLEAN HCFC−22 TO BE
A USED FOR FLUSHING.

1 LOW HIGH

VAPOR LINE	NEW
SERVICE VALVE	OUTDOOR
	UNIT

OPENED CLOSED

EXISTING

INDOOR

UNITB

LIQUID LINE SERVICE

VALVE

			TANK
			RETURN
	VAPOR LIQUID	C	DISCHARGE
D			INLET
RECOVERY
CYLINDER
			RECOVERY MACHINE

HUse a field−provided fitting to temporary reconnect the liquid line to the indoor unit’s liquid line orifice housing.

3FLUSHING 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.

ASet 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.

BInvert the cylinder of clean HCFC−22 and open its valve to allow liquid refrigerant to flow into the system through the vapor 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.

AInverted HCFC−22 cylinder with clean refrigerant to the vapor service valve.

BHCFC−22 gauge set (low side) to the liquid line valve.

CHCFC−22 gauge set center port to inlet on the recovery machine with an empty recovery tank to the gauge set.

DConnect recovery tank to recovery machines per machine instructions.

CAfter 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 down to 0 the system.

DClose 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 9. Installing Indoor Expansion Valve

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XC16 SERIES