Page 19
XP25
Flushing the System
SENSING
LINE
TEFLON
®
RING
FIXED ORIFICE
BRASS NUT
LIQUID LINE ASSEMBLY
(INCLUDES STRAINER)
LIQUID LINE ORIFICE HOUSING
DISTRIBUTOR TUBES
DISTRIBUTOR
ASSEMBLY
REMOVE AND DISCARD
WHITE TEFLON
®
SEAL
(IF PRESENT)
A
ON FULLY CASED COILS, REMOVE THE COIL ACCESS AND PLUMBING
PANELS.
B
REMOVE ANY SHIPPING CLAMPS HOLDING THE LIQUID LINE AND DIS
TRIBUTOR ASSEMBLY.
C
USING TWO WRENCHES, DISCONNECT LIQUID LINE FROM LIQUID LINE
ORIFICE HOUSING. TAKE CARE NOT TO TWIST OR DAMAGE DISTRIBU
TOR TUBES DURING THIS PROCESS.
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.
TYPICAL EXISTING FIXED ORIFICE
REMOVAL PROCEDURE
(UNCASED COIL SHOWN)
TYPICAL EXISTING EXPANSION VALVE
REMOVAL PROCEDURE (UNCASED COIL
SHOWN)
TWO PIECE PATCH PLATE
(UNCASED COIL ONLY)
VAPOR
LINE
DISTRIBUTOR
ASSEMBLY
DISTRIBUTOR
TUBES
LIQUID
LINE
MALE EQUALIZER
LINE FITTING
EQUALIZER
LINE
CHECK
EXPANSION
VALVE
TEFLON®
RING
STUB END
TEFLON
®
RING
SENSING BULB
LIQUID LINE
ORIFICE
HOUSING
LIQUID LINE
ASSEMBLY WITH
BRASS NUT
A
ON FULLY CASED COILS, REMOVE THE COIL ACCESS AND PLUMBING
PANELS.
B
REMOVE ANY SHIPPING CLAMPS HOLDING THE LIQUID LINE AND DIS
TRIBUTOR ASSEMBLY.
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 DISTRIBU
TOR TUBES DURING THIS PROCESS.
G
REMOVE AND DISCARD CHECK EXPANSION VALVE AND THE TWO TEF
LON
®
RINGS.
H
USE A FIELD-PROVIDED FITTING TO TEMPORARILY RECONNECT THE
LIQUID LINE TO THE INDOOR UNIT'S LIQUID LINE ORIFICE HOUSING.
LOW
HIGH
EXISTING
INDOOR
UNIT
GAUGE
MANIFOLD
INVERTED HCFC-22
CYLINDER CONTAINS
CLEAN HCFC-22 TO BE
USED FOR FLUSHING.
LIQUID LINE SERVICE
VALVE
INLET
DISCHARGE
TANK
RETURN
CLOSED
OPENED
RECOVERY
CYLINDER
RECOVERY MACHINE
NEW
OUTDOOR
UNIT
VAPOR LINE
SERVICE VALVE
V
APOR
LIQUID
1
A
INVERTED HCFC-22 CYLINDER WITH CLEAN REFRIGERANT TO THE
VAPOR 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 TO THE GAUGE SET.
D
CONNECT RECOVERY TANK TO RECOVERY MACHINES PER MACHINE
INSTRUCTIONS.
CONNECT GAUGES AND EQUIPMENT FOR
FLUSHING PROCEDURE
A
B
C
D
B
OR
FLUSHING LINE SET
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 VACU
UM ON THE EXISTING SYSTEM LINE SET AND INDOOR UNIT COIL.
B
INVERT 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.
C
AFTER ALL OF THE LIQUID REFRIGERANT HAS BEEN RECOV
ERED, SWITCH THE RECOVERY MACHINE TO VAPOR RECOVERY
SO THAT ALL OF THE HCFC-22 VAPOR IS RECOVERED. ALLOW
THE RECOVERY MACHINE TO PULL 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 OFF THE MACHINE.
THE LINE SET AND INDOOR UNIT COIL MUST BE FLUSHED WITH AT
LEAST THE SAME AMOUNT OF CLEAN REFRIGERANT THAT PRE
VIOUSLY CHARGED THE SYSTEM. CHECK THE CHARGE IN THE
FLUSHING CYLINDER BEFORE PROCEEDING.
LINE SET AND INDOOR COIL (1 OF 2)
1A
2
3
CAUTION
- This procedure should not be performed on sys
tems which contain contaminants (Example, compressor burn
out).
1B
