Elite XC16-024-230, XC16-036-230, XC16-048-230, XC16-060-230, XC20-060-230 Installation Instructions Manual
...
INSTALLATION
E2018 Lennox Industries Inc.
Dallas, Texas, USA
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
General
This XC16 outdoor air conditioner is designed for use with
HFC-410A refrigerant only. This unit must be installed with
an approved indoor air handler or coil. See the Lennox
XC16 Product Specifications bulletin (EHB) for approved
indoor component match-ups.
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
NOTICE !
For more in-depth information, consult the Installa
tion and Service Procedures manual, available as
Corp. 0625-L5 on LennoxPROs.com or through the
Technical Support department at 800-453-6669.
INSTRUCTIONS
Elite® Series XC16 Units
AIR CONDITIONER
507161-01
7/2018
WARNING
Improper installation, adjustment, alteration, ser
vice or maintenance can cause property damage,
personal injury or loss of life.
Installation and service must be performed by a li
censed professional installer (or equivalent) or ser
vice agency.
CAUTION
Before attempting to perform any service or mainte
nance, turn the electrical power to unit OFF at dis
connect switch.
CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.
STEP 1 -- SETTING THE UNIT -- Clearances
NOTES:
See NOTES
See
NOTES
See NOTES
NOTICE: Specific applications may require adjustment of the listed installation clearances to provide protection for
the unit from physical damage or to avoid conditions which limit operating efficiency. (Example: Clearances may
have to be increased to prevent snow or ice from falling on the top of the unit. Additional clearances may also be
required to prevent air recirculation when the unit is installed under a deck or in another tight space.)
See
NOTES
Control
Box
Service clearance of 30 in. must be maintained on one of the sides
adjacent to the control box.
Clearance to one of the other three sides must be 36 in.
Clearance to one of the remaining two sides may be 12 in. and the
final side may be 6 in.
A clearance of 24 in. must be maintained between two units.
48 in. clearance required on top of unit.
FIGURE 1
Page 1
UNIT DIMENSIONS - INCHES (MM)
A
LIQUID LINE
CONNECTION
ELECTRICAL INLETS
SUCTION LINE
CONNECTION
C
4-3/4”
(121)
B
TOP VIEW
K
J
G
H
SIDE VIEW
UNIT SUPPORT
FEET
4-1/2”
(108)
D
E
F
XC16-024 TO -060 BASE WITH
ELONGATED LEGS
Model Number A B C D E F G H J K
XC16-024-230 45 (1143)
XC16-036-230 31 (787)
XC16-048-230 39 (991)
XC16-060-230 45 (1143) 35-1/2 (902) 39-3/8 (1001) 16-7/8 (429) 8-3/4 (222) 3-1/8 (79) 30-3/4 (781) 4-5/8 (117) 3-3/4 (95) 26-7/8 (683)
30-1/2 (775) 35 (889) 13-7/8 (352) 7-3/4 (197) 3-1/4 (83) 27-1/8 (689) 3-5/8 (92) 4-1/2 (114) 20-5/8 (524)
Page 2
STEP 1 -- SETTING THE UNIT (Continued)
-- Unit Placement
NOTICE !
Roof Damage!
This system contains both refrigerant and oil. Some
rubber roofing material may absorb oil, causing the
rubber to degrade. Failure to follow this notice
could result in damage to roof surface.
WARNING
To prevent personal injury, as well as damage to
panels, unit or structure, observe the following:
While installing or servicing this unit, carefully stow
all removed panels so that the panels will not cause
injury to personnel, objects or nearby structures.
Also, take care to store panels where they will not be
subject to damage (e.g., being bent or scratched).
While handling or stowing the panels, consider any
weather conditions (especially wind) that may
cause panels to be blown around and damaged.
ELEVATED SLAB MOUNTING USING FEET
EXTENDERS
Use additional 2” SCH 40 male
threaded adapters which can
be threaded into the female
threaded adapters to make
additional adjustments to the
2” (50.8MM) SCH 40
MALE THREADED
ADAPTER
FEMALE THREADED
LEG DETAIL
2” (50.8MM) SCH 40
ADAPTER
level of the unit.
FIGURE 4
BASE
PLACEMENT
Install unit away from windows.
TWO 90° ELBOWS INSTALLED IN LINE SET
WILL REDUCE LINE SET VIBRATION.
FIGURE 2
SLAB MOUNTING
Install unit level or, if on a slope, maintain slope tolerance of 2
degrees (or 2 inches per 5 feet [50 mm per 1.5 m]) away from
building structure.
BUILDING
STRUCTURE
STABILIZING UNIT ON UNEVEN SURFACES
#10 X 1/2” LONG
SELF-DRILLING
SHEET METAL
SCREWS
STABILIZING BRACKET
(18-GAUGE METAL — 2”
WIDTH; HEIGHT AS
REQUIRED)
#10 X 1-1/4” LONG
HEX HD SCREW AND
FLAT WASHER
PLASTIC ANCHORS
(DRILL 1/4” HOLE)
CONCRETE SLAB
!
IMPORTANT !
CORNER POST
Unit Stabilizer Bracket Use
(field-provided):
Always use stabilizers when unit is raised
above the factory height.
(Elevated units could become unstable in
gusty wind conditions.)
Stabilizers may be used on any unit installed
on unstable and uneven surfaces.
FIGURE 5
COIL
BASE PAN
GROUND LEVEL
FIGURE 3
MOUNTING
SLAB
IMPORTANT !
Exhaust vents from dryers, water heaters and
furnaces should be directed away from the outdoor
unit. Prolonged exposure to exhaust gases and the
chemicals contained within them may cause
condensation to form on the steel cabinet and other
metal components of the outdoor unit. This will
diminish unit performance and longevity.
Page 3
XC16 SERIES
STEP 2 – REFRIGERANT PIPING –
Flushing Existing Line Set & Indoor Coil
Flush the existing line set per the following instruc
tions. For more information, refer to the Installation
and Service Procedures manual available on Dave
Net. CAUTION - DO NOT attempt to flush and re-use ex
isting line sets or indoor coil when the system con
tains contaminants (i.e., compressor burn out).
NOTE - When installing refrigerant lines longer than 50
feet, refer to the Refrigerant Piping Design and Fabrication
Guidelines manual available on DaveNet (Corp. 9351-L9),
or contact the Technical Support Department Product Ap
plication group for assistance.
NOTE - For new or replacement line set installation, refer
to Service and Application Note - Corp. 9112-L4 (C-91-4).
WARNING
Refrigerant can be harmful if it is inhaled. Refrigerant
must be used and recovered responsibly.
Failure to follow this warning may result in personal
injury or death.
IMPORTANT !
If this unit is being matched with an approved line set or in
door unit coil that was previously charged with mineral oil,
or if it is being matched with a coil which was manufactured
before January of 1999, the coil and line set must be
flushed prior to installation. Take care to empty all existing
traps. Polyol ester (POE) oils are used in Lennox units
charged with HFC-410A refrigerant. Residual mineral oil
can act as an insulator, preventing proper heat transfer. It
can also clog the expansion device and reduce system
performance and capacity.
Failure to properly flush the system per this instruction
and the detailed Installation and Service Procedures
manual will void the warranty.
WARNING
When using a high-pressure gas such as
nitrogen to pressurize a refrigeration or
air conditioning system, use a regulator
that can control the pressure down to 1 or
2 psig (6.9 to 13.8 kPa).
WARNING
Polyol ester (POE) oils used with HFC-410A refrigerant
absorb moisture very quickly. It is very important that
the refrigerant system be kept closed as much as
possible. DO NOT remove line set caps or service valve
stub caps until you are ready to make connections.
TABLE 1
REFRIGERANT LINE SET — INCHES (MM)
Field
Model
-024
-036
-048
-060
NOTE - Some applications may require a field-provided 7/8” to 1-1/8” adapter.
Connections
Liquid
Line
3/8”
(10 mm)
3/8”
(10mm)
3/8”
(10mm)
Suction
Line
3/4”
(19 mm)
7/8”
(22mm)
1-1/8”
(29 mm)
WEIGH-IN
CHARGING METHOD FOR LONG LINE SETS
64ºF (17.7ºC) and Below
Amount specified
on nameplate
Adjust amount for variation in
line set length and liquid line
diameter using table below.
+
Recommended Line Set
Liquid
(10 mm)
(10 mm)
(10 mm)
Line
3/8”
3/8”
3/8”
Suction
Line
3/4”
(19 mm)
7/8”
(22 mm)
1-1/8”
(29 mm)
L15 Line Set
L15-41: 15 ft.–50 ft.
(4.6 m–15 m)
L15-65: 15 ft.– 50 ft.
(4.6 m–15 m)
Field-Fabricated
Total charge
=
WARNING
Fire, Explosion and Personal Safety Haz
ard. Failure to follow this warning could
result in damage, personal injury or
death.
Never use oxygen to pressurize or purge
refrigeration lines. Oxygen, when ex
posed to a spark or open flame, can cause
fire and/or an explosion, that could result
in property damage, personal injury or
death.
IMPORTANT !
Some scroll compressors have an internal vacuum
protector that will unload scrolls when suction pres
sure goes below 20 psig. A hissing sound will be heard
when the compressor is running unloaded. Protector
will reset when low pressure in system is raised above
40 psig. DO NOT REPLACE COMPRESSOR.
NOTE - Insulate liquid line when it is routed through areas where the
surrounding ambient temperature could become higher than the
temperature of the liquid line or when pressure drop is equal to or
greater than 20 psig.
NOTE - The above nameplate is for illustration purposes only. Go to
actual nameplate on outdoor unit for charge information.
Liquid Line
Set Diameter
5/16”
3/8”
1/2”
HFC-410A
(ounces per foot)
0.40
0.60
1.00
Charging Formula for Liquid Line Charge Adjustments
[(Line set oz./ft. x total length) (factory charge for line set)] = charge adjustment
Example: Units are factorycharged for 15 feet (4.6 meters) of 3/8" line set.
Factory charge for 3/8" is 0.60 oz/ft x 15 = 9.0 ounces.
FIGURE 6
Page 4
STEP 2 -- REFRIGERANT PIPING -- Removing Existing Indoor Metering Device
TYPICAL EXISTING FIXED ORIFICE
1A
DISTRIBUTOR
ASSEMBLY
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.
(UNCASED COIL SHOWN)
DISTRIBUTOR TUBES
LIQUID LINE ORIFICE HOUSING
TEFLON® RING
FIXED ORIFICE
REMOVE AND DISCARD
WHITE TEFLON
(IF PRESENT)
®
SEAL
LIQUID LINE ASSEMBLY
(INCLUDES STRAINER)
REMOVAL PROCEDURE
OR
BRASS NUT
1B
TWO-PIECE PATCH PLATE
(UNCASED COIL ONLY)
CONNECT GAUGES AND EQUIPMENT FOR
FLUSHING PROCEDURE
2
VAPOR LINE
SERVICE VALVE
EXISTING
INDOOR
UNIT
LIQUID LINE SERVICE
VALV E
RECOVERY
CYLINDER
D
A. HCFC-22 cylinder with clean refrigerant (positioned to deliver liquid
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 connected to the gauge set.
D. Connect recovery tank to recovery machine per machine instructions.
CYLINDER CONTAINING
CLEAN HCFC-22 TO BE USED
FOR FLUSHING
(Positioned to deliver liquid
refrigerant)
A
1
B
VAPOR
LIQUID
NEW
OUTDOOR
UNIT
C
GAUGE
MANIFOLD
LOW HIGH
OPENED
TANK
RETURN
INLET
DISCHARGE
RECOVERY MACHINE
CLOSED
TYPICAL EXISTING EXPANSION VALVE REMOVAL
PROCEDURE (UNCASED COIL SHOWN)
ORIFICE
HOUSING
EQUALIZER
LINE
STUB END
TEFLON
RING
VAPOR
EXPANSION
VALV E
®
LIQUID LINE
ASSEMBLY WITH
BRASS NUT
LINE
TEFLON
RING
®
SENSING
LINE
LIQUID
LINE
LIQUID LINE
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 expansion valve equalizer
line fitting on the vapor line.
D. Remove the vapor line sensing bulb.
E. Disconnect the liquid line from the expansion valve at the liquid line
assembly.
F. Disconnect the expansion valve from the liquid line orifice housing.
Take care not to twist or damage distributor tubes during this
process.
G. Remove and discard expansion valve and the two Teflon® 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
3
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
B
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 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 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 7
Page 5
XC16 SERIES
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