Refrigerant Metering Device Kits; Installing New Indoor Unit Metering Device - Lennox Elite XC13 Installation Instructions Manual

INVERTED HCFC−22
CYLINDER CONTAINS
CLEAN HCFC−22 TO BE
USED FOR FLUSHING.
A
SUCTION LINE
SERVICE VALVE
EXISTING
INDOOR
UNIT
LIQUID LINE SERVICE VALVE
RECOVERY
CYLINDER
D
A Inverted HCFC−22 cylinder with clean 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 to the gauge set.
D Connect recovery tank to recovery machines per machine
instructions.
NOTE − The inverted HCFC−22 cylinder must contain at least the same
amount of refrigerant as was recovered from the existing system.
Figure 20. Typical Flushing Connection
NOTE − Use recovery machine instructions for specific
setup requirements.
PROCEDURE
1. 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.
2. Invert the cylinder of clean HCFC−22 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.
3. After all of the liquid refrigerant has been recovered,
switch the recovery machine to suction recovery so
that all of the HCFC−22 suction is recovered. Allow the
recovery machine to pull a vacuum on the system.
4. 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.
5. Use dry nitrogen to break the vacuum on the
refrigerant lines and indoor unit coil before removing
the recovery machine, gauges and refrigerant drum.

Refrigerant Metering Device Kits

This outdoor unit is designed for use in systems that use
one of the following refrigerant metering devices:
GAUGE
MANIFOLD
LOW
PRESSURE
NEW
OUTDOOR
UNIT
OPENED CLOSED
B
TANK
RETURN
C
INLET
DISCHARGE
RECOVERY MACHINE
S
Thermal expansion valve (TXV)
S
RFC (Fixed orifice)
HIGH
See the XC14 Engineering Handbook for approved
PRESSURE
indoor/outdoor match−ups, applicable refrigerant metering
device kits and application information.
FIXED ORIFICE KITS
The indoor unit fixed orifice kit (included with outdoor unit)
contains the following parts:
Figure 21. Fixed Orifice Kit Components
TXV KITS
The indoor unit TXV kit (ordered separately) includes the
following parts:
Installing New Indoor Unit Metering
Device
XC13 units can be configured for use in with either a
HFC−410A fixed orifice or TXV metering devices. This
section provides instructions on installing either a fixed
orifice or TXV refrigerant metering device.
Page 13
FIXED ORIFICE (1)
FIXED ORIFICE
EXTRACTOR (1)
TEFLON RING (1)
FIXED ORIFICE STICKER (1)
TEFLON
RINGS (2)
COPPER
MOUNTING
STRAP (1)
Figure 22. TXV Kit Components
TXV (1)
HEX HEAD BOLTS
AND NUTS (2)
XC13 SERIES