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XC13 SERIES
4
5
WRAP SERVICE VALVE
FLOW
NITROGEN
To protect components during brazing, wrap a wet cloth around the liquid
line service valve body and copper tube stub and use another wet cloth
underneath the valve body to protect the base paint. Also, shield the light
maroon R−410A sticker.
FLOW
NITROGEN
Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration gauge
set into the valve stem port connection on the liquid line service valve
and out of the valve stem port connection on the suction service valve.
NOTE − The fixed orifice or TXV metering device at the
indoor unit will allow low pressure nitrogen to flow through
the system.
6
7
BRAZE LINE SET
INSTALL SERVICE PORT CAPS ONLY
Braze the liquid line to the liquid line service valve. Turn off nitrogen flow.
After all connections have been brazed, disconnect manifold gauge
set from service ports, cool down piping with wet rag and remove all
wrappings. Do not reinstall cores until after evacuation procedure.
Reinstall service caps if desired to close off refrigerant ports.
IMPORTANT − Repeat procedure starting at paragraph 4 for brazing
the suction line to service port valve.
SERVICE PORT
CORE
SERVICE PORT
CAP
SERVICE PORT
Removing Indoor Unit Metering Device
Remove the existing HCFC−22 fixed orifice or TXV from
the indoor coil. The existing indoor unit HCFC−22 metering
device is not approved for use with HFC−410A refrigerant
and may prevent proper flushing.
REPLACEMENT PARTS
If replacement liquid line parts are necessary for the indoor
unit, order kit 69J46 (LB−95325A). The kit includes:
TEFLON RINGS (20)
BRASS NUTS (10)
LIQUID LINE ASSEMBLIES
(INCLUDES STRAINER) (10)
LIQUID LINE ORIFICE HOUSINGS (10)
LIQUID LINE
ASSEMBLY
COPPER
TUBE
PISTON
RETAINER
STRAINER
Figure 17. Liquid Line Kit Components
TYPICAL FIXED ORIFICE REMOVAL PROCEDURE
Use the following procedure to remove the indoor unit’s
fixed orifice and install a temporary field provided fitting.
TEFLON RING
FIXED
ORIFICE
(Uncased Coil Shown)
BRASS NUT
LIQUID LINE ASSEMBLY
(INCLUDES STRAINER)
LIQUID LINE ORIFICE HOUSING
DISTRIBUTOR TUBES
DISTRIBUTOR
ASSEMBLY
REMOVE AND
DISCARD
WHITE TEFLON SEAL
(IF PRESENT)
Figure 18. Typical Fixed Orifice Removal
1. On fully cased coils, remove the coil access and
plumbing panels.
2. Remove any shipping clamps holding the liquid line
and distributor assembly.
3. Using two wrenches, disconnect liquid line from liquid
line orifice housing. Take care not to twist or damage
distributor tubes during this process.
