Lennox EL16XC1 Series Manual

Page 1
Corp. 1503-L7 EL16XC1
Service Literature
INSTALLATION AND SERVICE PROCEDURE
August 29, 2016
EL16XC1 (HFC-410A) SERIES UNITS WITH ALL-ALUMINUM COIL
This literature is intended as a general guide and does not
supersede local codes in any way. Consult authorities who
have jurisdiction before installation.
WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause personal injury, loss of life, or
damage to property.
Installation and service must be performed by a licensed
professional installer (or equivalent) or a service agency.
IMPORTANT
This unit must be matched with an indoor coil as speci
fied in Lennox EL16XC1 Engineering Handbook. Coils
previously charged with HCFC-22 must be flushed.
WARNING
Electric Shock Hazard. Can cause injury
or death. Unit must be grounded in
accordance with national and local
codes.
Line voltage is present at all
components when unit is not in
operation on units with single‐pole
contactors. Disconnect all remote
electric power supplies before opening
access panel. Unit may have multiple
power supplies.
TABLE OF CONTENTS
Model Number Identification 2....................
Typical Serial Number Identification 2..............
Specifications 2.................................
Electrical Data 3................................
Unit Dimensions 4...............................
Unit Parts Arrangement 5........................
Operating Gauge Set and Service Valves 6.........
Outdoor Unit Placement 8........................
Removing and Installing Panels 10.................
New or Replacement Line Set 11...................
Brazing Connections 14...........................
Flushing Line Set and Indoor Coil 17................
Installing Indoor Metering Device 18................
Leak Test Line Set and Indoor Coil 19...............
Evacuating Line Set and Indoor Coil 20.............
Electrical 21.....................................
System Operation 23.............................
Maintenance 23..................................
Start-Up and Performance Checklist 24.............
Unit Electrical Diagram and Sequence
of Operations 25.................................
Servicing Units Void of Charge 27..................
Unit Start-Up 27.................................
System Refrigerant 27............................
The EL16XC1 air conditioners, which will also be referred
to in this instruction as the outdoor unit, use HFC-410A
refrigerant. This outdoor unit must be installed with a
matching indoor unit and line set as outlined in the Lennox
EL16XC1 Engineering Handbook.
This outdoor unit is designed for use in systems that use
one of the following refrigerant metering devices:
Expansion valve (TXV)
Fixed orifice
IMPORTANT: Special procedures are required for
cleaning the aluminum coil in this unit. See page 23 in this
manual for information.

Page 2
Model Number Identification
CX
16 036 A
Unit Type
C = Air Conditioner
Refrigerant
X = R-410A
Nominal Cooling Capacity - Tons
018 = 1.5
024 = 2
030 = 2.5
036 = 3
041 = 3.5
042 = 3.5
047 = 4
048 = 4
060 = 5
Minor Revision Number
Nominal SEER
01
Voltage
230 = 208/230V-1phase-60hz
230
−−
EL
Product Tier
EL = Elite®Series
1
Cooling Stages
1 = Single Stage Compressor
Regional Standards
– (dash) = All Regions or Southwest Region
(dependent on size)
S = North and South Regions
Ratings Revision Level
Typical Serial Number Identification
8 09 C
Year Code
08 = 2008
09 = 2009
10 = 2010
Month Code
A = January
B = February
C = March
05716
5 (or 6) Digit Unique Number
Location Code
19 = Saltillo, Mexico
58 = Marshalltown, IA
5
Specifications
Model Numbers
Unit Outdoor Fan
Sound Rating Number
(dB)1Factory Refrigerant Charge2Number of Blades Diameter - inches.
EL16XC1-018 72 4 lbs. 9 oz. 3 18
EL16XC1-024 72 4 lbs. 9 oz. 3 22
EL16XC1-030 71 5 lbs. 8 oz. 3 22
EL16XC1-036
EL16XC1S036 73 7 lbs. 1 oz. 3 22
EL16XC1-041 72 9 lbs. 9 oz. 3 22
EL16XC1-042 72 8 lbs. 12 oz. 3 22
EL16XC1-047 72 11 lbs. 0 oz. 4 26
EL16XC1-048 75 9 lbs. 12 oz. 4 22
EL16XC1-060 73 12 lbs. 0 oz. 3 26
1Tested according to AHRI Standard 270-2008 test conditions.
2Refrigerant charge sufficient for 15 foot length of refrigerant lines.

Page 3
EL16XC1 SERIES
Electrical Data
208/230V - 60 Hz - 1 ph
Model Numbers
Unit Compressor Condenser Fan
Maximum
Over-
current
Protection
(amps)1
Minimum
Circuity
Ampacity2
Rated Load
Amps (RLA)
Locked Ro
tor Amps
(LRA)
Motor HP Nominal
RPM
Full Load
Amps (FLA)
Locked Ro
tor Amps
(LRA)
EL16XC1-018 20 11.9 9.0 48.0 1/10 1075 0.7 1.3
EL16XC1-024 25 14.6 10.9 59.3 1/6 825 1.0 1.9
EL16XC1-030 25 17.0 12.8 67.8 1/6 825 1.0 1.9
EL16XC1-036
EL16XC1S036 30 18.0 13.6 79.0 1/6 825 1.0 1.9
EL16XC1-041 30 19.3 14.7 75.0 1/6 825 1.0 1.9
EL16XC1-042 40 23.4 17.9 112.0 1/6 825 1.0 1.9
EL16XC1-047 35 21.9 16.1 105.5 1/3 825 1.8 2.9
EL16XC1-048 40 24.2 18.0 117.0 1/4 825 1.7 3.2
EL16XC1-060 50 29.6 22.2 127.9 1/3 825 1.8 2.9
1HACR type circuit breaker or fuse.
2Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements.

Page 4
Unit Dimensions - Inches (mm)
ELECTRICAL INLETS
SIDE VIEW
SUCTION LINE
CONNECTION
LIQUID LINE
CONNECTION
4.25”
(108MM)
4.75”
(121MM)
TOP VIEW
UNIT SUPPORT
FEET
8.50”
(216MM)
D
G
K
J
E
F
EL16XC1-018 BASE SECTION
(Small Base)
8.75”
(222MM)
5.50”
(140MM)
9.25”
(241MM)
8.25”
(210MM)
13.50”
(343MM)
UNIT SUPPORT
FEET
EL16XC1-024 TO -060 BASE SECTION
(Medium and Large Base)
H
A
B
C
Model Numbers EL16XC1-XXX-230-XX — Dimensions - in. (mm)
A B C D E F G H J K
EL16XC1-018 31 (787) 27 686) 28 (711) See above.
EL16XC1-024 31 (787) 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)
EL16XC1-030 39 (991) 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)
EL16XC1-036
EL16XC1S036 31 (787) 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)
EL16XC1-041 35 (889) 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)
EL16XC1-042 39 (991) 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)
EL16XC1-047 35 (889) 35-1/2
(902)
39-1/2
(1003)
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)
EL16XC1-048 39 (991) 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)
EL16XC1-060 45 (1143) 35-1/2
(902)
39-1/2
(1003)
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)

Page 5
EL16XC1 SERIES
Typical Unit Parts Arrangement
LIQUID LINE
FILTER DRIER
(SINGLE FLOW)
LIQUID LINE SERVICE
VALVE
SUCTION LINE
SERVICE VALVE
FIELD CONNECTION
FOR SUCTION LINE
HIGH PRESSURE
SWITCH (S4)
COMPRESSOR
HARNESS
GROUND LUG
CONTACTOR - 1 POLE (K1-1)
CAPACITOR (C12)
CONTROL PANEL
TYPICAL PLUMBING
(COPELAND COMPRESSOR)
DISCHARGE-LINE HIGH
TEMPERATURE SENSOR
LIQUID LINE
FILTER DRIER
(SINGLE FLOW)
DISCHARGE-LINE HIGH
TEMPERATURE SENSOR
COMPRESSOR
HARNESS
HIGH PRESSURE
SWITCH (S4)
LIQUID LINE SERVICE
VALVE
SUCTION LINE
SERVICE VALVE
FIELD CONNECTION
FOR SUCTION LINE
FIELD CONNECTION
FOR LIQUID LINE FIELD CONNECTION
FOR LIQUID LINE
TYPICAL PLUMBING
(LG COMPRESSOR)
Figure 1. Typical Parts Arrangements

Page 6
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for noncompliance.
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.
Operating Gauge Set and Service Valves
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
who have jurisdiction before installation.
TORQUE REQUIREMENTS
When servicing or repairing heating, ventilating, and air
conditioning components, ensure the fasteners are
appropriately tightened. Table 1 lists torque values for
fasteners.
IMPORTANT
Only use Allen wrenches of sufficient hardness (50Rc -
Rockwell Harness Scale minimum). Fully insert the
wrench into the valve stem recess.
Service valve stems are factory-torqued (from 9 ft-lbs for
small valves, to 25 ft-lbs for large valves) to prevent
refrigerant loss during shipping and handling. Using an
Allen wrench rated at less than 50Rc risks rounding or
breaking off the wrench, or stripping the valve stem
recess.
See the Lennox Service and Application Notes #C-08-1
for further details and information.
IMPORTANT
To prevent stripping of the various caps used, the
appropriately sized wrench should be used and fitted
snugly over the cap before tightening.
Table 1. Torque Requirements
Parts Recommended Torque
Service valve cap 8 ft.- lb. 11 NM
Sheet metal screws 16 in.- lb. 2 NM
Machine screws #10 28 in.- lb. 3 NM
Compressor bolts 90 in.- lb. 10 NM
Gauge port seal cap 8 ft.- lb. 11 NM
USING MANIFOLD GAUGE SET
When checking the system charge, only use a manifold
gauge set that features low loss anti-blow back fittings.
Manifold gauge set used with HFC-410A refrigerant
systems must be capable of handling the higher system
operating pressures. The gauges should be rated for use
with pressures of 0 - 800 psig on the high side and a low
side of 30” vacuum to 250 psig with dampened speed to
500 psi. Gauge hoses must be rated for use at up to 800
psig of pressure with a 4000 psig burst rating.
OPERATING SERVICE VALVES
The liquid and vapor line service valves are used for
removing refrigerant, flushing, leak testing, evacuating,
checking charge and charging.
Each valve is equipped with a service port which has a
factory-installed valve stem. Figure 2 provides information
on how to access and operating both angle and ball service
valves.

Page 7
EL16XC1 SERIES
(VALVE STEM SHOWN
CLOSED) INSERT HEX
WRENCH HERE
SERVICE PORT CORE
SERVICE PORT CAP
ANGLE-TYPE SERVICE VALVE
(FRONT-SEATED CLOSED)
SERVICE PORT
CORE
TO OUTDOOR UNIT
STEM CAP
(VALVE STEM SHOWN OPEN)
INSERT HEX WRENCH HERE
TO INDOOR
UNIT
ANGLE-TYPE SERVICE VALVE
(BACK-SEATED OPENED)
BALL (SHOWN
CLOSED)
SERVICE PORT
CORE
TO INDOOR UNIT
TO OUTDOOR
UNIT
TO OPEN ROTATE STEM
COUNTERCLOCKWISE 90°.
TO CLOSE ROTATE STEM
CLOCKWISE 90°.
SERVICE PORT
SERVICE PORT
CAP
STEM CAP
VALVE
STEM
SERVICE VALVES ANGLE AND BALL
Operating Angle Type Service Valve:
1. Remove stem cap with an appropriately sized wrench.
2. Use a service wrench with a hex-head extension (3/16” for liquid line valve sizes and 5/16” for vapor line valve sizes) to back
the stem out counterclockwise as far as it will go.
Operating Ball Type Service Valve:
1. Remove stem cap with an appropriately sized wrench.
2. Use an appropriately sized wrenched to open. To open valve,
roate stem counterclockwise 90°. To close rotate stem clockwise
90°.
123
4
5
6
7
8
9
10
11 12
1/12 TURN
To Access Service Port:
A service port cap protects the service port core from contamination and
serves as the primary leak seal.
1. Remove service port cap with an appropriately sized wrench.
2. Connect gauge set to service port.
3. When testing is completed, replace service port cap and tighten as
follows:
With torque wrench: Finger tighten and
torque cap per table 1.
Without torque wrench: Finger tighten and
use an appropriately sized wrench to turn
an additional 1/6 turn clockwise.
12
3
4
5
6
7
8
9
10
1112
1/6 TURN
WHEN SERVICE VALVE IS CLOSED,THE SERVICE PORT IS OPEN
TO THE LINE SET AND INDOOR UNIT.
When service valve is OPEN, the service port is
open to linE set, indoor and outdoor unit.
Reinstall Stem Cap:
Stem cap protects the valve stem from damage and serves as the
primary seal. Replace the stem cap and tighten as follows:
With Torque Wrench: Finger tighten and
then torque cap per table 1.
Without Torque Wrench: Finger tight
en and use an appropriately sized
wrench to turn an additional 1/12 turn
clockwise.
NOTE — A label with specific torque requirements may be affixed to the stem cap. If the label is present, use the specified torque.
Figure 2. Angle and Ball Service Valves

Page 8
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See
NOTES
See NOTES
NOTES:
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.
See
NOTES
See NOTES Control
Box
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.)
Figure 3. Installation Clearances
Outdoor Unit Placement
CAUTION
In order to avoid injury, take proper precaution when
lifting heavy objects.
See Unit Dimensions on page 3 for sizing mounting slab,
platforms or supports. Refer to figure 3 for mandatory
installation clearance requirements.
POSITIONING CONSIDERATIONS
Consider the following when positioning the unit:
Some localities are adopting sound ordinances based
on the unit's sound level registered from the adjacent
property, not from the installation property. Install the
unit as far as possible from the property line.
When possible, do not install the unit directly outside
a window. Glass has a very high level of sound
transmission. For proper placement of unit in relation
to a window see the provided illustration in figure 4,
detail A.
PLACING UNIT ON SLAB
When installing unit at grade level, the top of the slab
should be high enough above grade so that water from
higher ground will not collect around the unit. The slab
should have a slope tolerance as described in figure 4,
detail B.
NOTE — If necessary for stability, anchor unit to slab as
described in figure 4, detail D.
ELEVATING THE UNIT
Units are outfitted with elongated support feet as illustrated
in figure 4, detail C.
If additional elevation is necessary, raise the unit by
extending the height of the unit support feet. This may be
achieved by using a 2 inch (50.8mm) Schedule 40 female
threaded adapter.
The specified coupling will fit snuggly into the recessed
portion of the feet. Use additional 2 inch (50.8mm)
Schedule 40 male threaded adaptors which can be
threaded into the female threaded adaptors to make
additional adjustments to the level of the unit.
NOTE — Keep the height of extenders short enough to
ensure a sturdy installation. If it is necessary to extend
further, consider a different type of field-fabricated
framework that is sturdy enough for greater heights.

Page 9
EL16XC1 SERIES
LEG DETAIL
BASE
2” (50.8MM) SCH 40
FEMALE THREADED
ADAPTER
Concrete slab — use two plastic anchors (hole
drill 1/4”)
Wood or plastic slab — no plastic anchor (hole
drill 1/8”)
COIL
BASE PAN
CORNER POST
STABILIZING BRACKET (18 GAUGE
METAL — 2” WIDTH; HEIGHT AS
REQUIRED)
— Slab Side Mounting
#10 1/2” LONG SELF-DRILLING
SHEET METAL SCREWS
#10 1-1/4” LONG HEX HD SCREW
AND FLAT WASHER
MINIMUM ONE
PER SIDE
Stabilizing bracket (18 gauge metal — 2” (50.8mm) width; height as required); bend to form
right angle as exampled below.
FOR EXTRA
STABILITY
— Deck Top Mounting
— Elevated Slab Mounting
using Feet Extenders
STABILIZING UNIT ON UNEVEN SURFACES
Install unit level or, if on a slope, maintain slope tolerance of two (2)
degrees (or two inches per five feet [50 mm per 1.5 m]) away from
building structure.
MOUNTING
SLAB
BUILDING
STRUCTURE
GROUND LEVEL
— Outside Unit Placement — Slab Mounting at Ground Level
SAME FASTENERS AS
SLAB SIDE MOUNTING.
IMPORTANT — To help stabilize an outdoor unit, some installations may require strapping the unit to the pad using brackets and anchors
commonly available in the marketplace.
DETAIL A DETAIL B
DETAIL C
DETAIL D
2” (50.8MM) SCH 40
MALE THREADED
ADAPTER
Use additional 2” SCH 40 male threaded adapters
which can be threaded into the female threaded
adapters to make additional adjustments to the level of
the unit.
TWO 90° ELBOWS INSTALLED IN LINE SET WILL
REDUCE LINE SET VIBRATION.
Install unit away from windows.
One bracket per side (minimum). For extra stability, two brackets per side, two inches
(51mm) from each corner.
DETAIL E
Figure 4. Placement, Slab Mounting and Stabilizing Unit

Page 10
STABILIZING UNIT ON UNEVEN SURFACES
IMPORTANT
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 factory height units when
mounted on unstable an uneven surface.
With unit positioned at installation site, perform the
following:
1. Remove two side louvered panels to expose the unit
base.
2. Install the brackets as illustrated in figure 4, detail D
using conventional practices.
3. Replace the panels after installation is complete.
ROOF MOUNTING
Install the unit a minimum of 6 inches (152 mm) above the
roof surface to avoid ice build-up around the unit. Locate
the unit above a load bearing wall or area of the roof that
can adequately support the unit. Consult local codes for
rooftop applications.
If unit coil cannot be mounted away from prevailing winter
winds, a wind barrier should be constructed. Size barrier at
least the same height and width as outdoor unit. Mount
barrier 24 inches (610 mm) from the sides of the unit in the
direction of prevailing winds.
NOTICE
Roof Damage!
This system contains both refrigerant and oil. Some
rubber roofing material may absorb oil and cause the
rubber to swell when it comes into contact with oil. The
rubber will then bubble and could cause leaks. Protect
the roof surface to avoid exposure to refrigerant and oil
during service and installation. Failure to follow this
notice could result in damage to roof surface.
Removing and Installing Panels
IMPORTANT
Do not allow panels to hang on unit by top tab. Tab is for
alignment and not designed to support weight of panel.
IMPORTANT
To help stabilize an outdoor unit, some installations may
require strapping the unit to the pad using brackets and
anchors commonly available in the marketplace.
WARNING
To prevent personal injury, or damage to panels, unit or
structure, be sure to observe the following:
While installing or servicing this unit, carefully stow all
removed panels out of the way, so that the panels will not
cause injury to personnel, nor cause damage to objects
or structures nearby, nor will the panels be subjected to
damage (e.g., being bent or scratched).
While handling or stowing the panels, consider any
weather conditions, especially windy conditions, that
may cause panels to be blown around and battered.