Lennox Elite XP13024 User manual

, ®
,t_2008 Lennox industries Inc,
Dallas, Texas, USA
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
WARNING
ACAUTION
AIMPORTANT
INSTALLATION
INSTRUCTIONS
Elite®Series XP13 Units
HEAT PUMPS _ Technical
505,327M j_jj Publications
04108 Litho U.S.A.
Supersedes 03/08
Shipping and Packing List ...................... 1
XP13 Heat Pumps ............................. 1
Unit Dimensions ............................... 2
General Information ........................... 3
Recovering Refrigerant from Existing System ..... 5
Removing Existing Outdoor Unit ................. 5
Positioning New Outdoor Unit ................... 6
Removing and Installing Panels ................. 7
New or Replacement Line Set ................... 9
Brazing Connections ........................... 10
Removing Indoor Unit Metering Device ........... 11
Flushing the System ........................... 12
Installing New Indoor Unit Metering Device ........ 13
Testing for Leaks .............................. 13
Evacuating the System ......................... 15
Servicing Unit Delivered Void of Charge ........... 15
Electrical Connections ......................... 15
Start-Up and Charging Procedures ............... 17
System Operation ............................. 17
Defrost System ............................... 21
Maintenance .................................. 22
Homeowner Information ........................ 22
Start-Up and Performance Checklist ............. 24
Check the unit for shipping damage and listed times below
are intact. If damaged, or if parts are missing, immediately
contact the last shipping carrier.
1 -- Assembled XP13 outdoor unit
AIMPORTANT
The XP13 Heat Pumps, which will also be referred to in this
instruction as the outdoor unit, uses HFC-410A
refrigerant. This outdoor unit must be installed with a
matching indoor unit and line set as outlined in the Lennox
XP13 Engineering Handbook.
This outdoor unit is designed for use in systems that use
check thermal expansion valve (CTXV) refrigerant
metering devices.
04/08
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII Page 1 505,327M IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII

RUN
CAPACITOR
DEFROST
BOARD
CONTACTOR
TOP VIEW
ii CDISCHARGE AIR t
SIDE VIEW
SUCTIONLINE
-CONNECTION
LIQUID LINE
CONNECTION
LIQUID LINE
ELECTRICAL
VAPOR LINE
4N/4(1 4-3/4
08) (121)
REVERSING
VALVE
FILTER DRIER/
LIQUID LINE
CONNECTIONS
HIGH PRESSURE
VAPOR LINE
XP13 PARTS ARRANGEMENT
VAPOR VALVE AND
GAUGE PORT/SUCTION
LINE CONNECTIONS
2 (51)
i}
C:=::::3 _
tt 1(25) SIDE VIEW
UNIT SUPPORT
FEET
8N/2
(216)
8-3/4
(222)
13-1/2
(343)
9N/2
(241)
8N/4
(210)
L
UNIT SUPPORT FEET \
T
13-7/8
(352)
(197)
3-1/4
(83)
@ @ ® 20-5/8
(524)
_l
4-1/2
(114)
3-5/8
(92)
XP13-018, 024, 030 AND 036 BASE SECTION
XP13 A
-018 31(787)
-024 31 (787)
-030 31 (787)
-036 35 (889)
-042 35(889)
-048 35 (889)
-060 45 (1143)
B
27 (686)
27 (686)
27 (686)
27 (686)
30-1/2 (775)
30-1/2 (775)
30-1/2 (775)
XP13 BASE WITH ELONGATED LEGS
C
28 (711)
28 (711)
28 (711)
28 (711)
35 (889)
35(889)
35(889)
Page 2
505327M 04/08

WARNING IMPORTANT
I_ TURN 1/12 TURN
98 4
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
who have jurisdiction before installation.
When servicing or repairing HVAC components, ensure
the fasteners are appropriately tightened. Table 1 shows
torque values for fasteners.
Table 1. Torque Requirements
Parts Recommended Torque
Service valve cap 8 ft Ib 11 NM
Sheet metal screws 16 in Ib 2 NM
Machine screws #10 28 in Ib 3 NM
Compressor bolts 90 in Ib 10 NM
Gauge port seal cap 8ft Ib 11 NM
USING MANIFOLD GAUGE SETS
When checking the system charge only use a manifold
gauge set that features low loss antiblow back fittings
See figure 2 for a typical manifold gauge connection setup
Manifold gauge sets used with HFC410A refrigerant
systems must be capable of handling the higher system
operating pressures The gauges should be rated for use
with pressures of 0 800 on the high side and a low side of
30" vacuum to 250 psi with dampened speed to 500 psi
Gauge hoses must be rated for use at up to 800 psi of
pressure with a 4000 psi 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 1. Cap Tightening Distances
Xk IMPORTANT
To Access Angle Type 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 to the service port
3 When testing iscompleted replace service port cap and
tighten as follows:
•With Torque Wrench: Finger tighten and then
tighten per table 1
• Without Torque Wrench: Finger tighten and use an
appropriately sized wrench to turn an additional
1/6 turn clockwise as illustrated in figure 1
To Open and Close AngleType Service Valve:
A valve stem cap protects the valve stem from
contamination and assures a leak free seal
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
3 Replace the stem cap and tighten as follows:
•With Torque Wrench: Tighten finger tight and then
tighten per table 1
•Without Torque Wrench: Finger tighten and use an
appropriately sized wrenched to turn an additional
1/12 turn clockwise as illustrated in figure 1
Page 3 XP13 SERIES

DISTRIBUTOR
CBECK 7 REV_#s,_T:Uv_E
_
_GAUGEM_,FOLD_ ,' ''--!, Ill _'_ 1
T LIQUID
IIBFc-°_oII b"<SE'@ II' _ II r--r'pJV,AmOR
IIA° °LtlJJ coo :ssoc w,w
k_ _ CHECK EXPANSION VALVE --
NOTE - ARROWS INDICATE DIRECTION
OF REFRIGERANT FLOW.
INDOOR UNIT
INDOOR
COIL
Figure 2. Typical Manifold Gauge Connection Setup
SERVICE PORT
CAP_
_L,_ SERVICE PORT
SERVICE PORT _"
COREj_ _<_ (VALVESTEMSBOWN
I _ /_ _ _ CLOSED) INSERT HEX
WRENCH HERE
FRONT-SEATED
TO INDOOR
UNIT
TO OUTDOOR UNITJ .J CLOSED TO BOTH INDOOR
AND OUTDOOR UNITS
Figure 3. Angle-Type Service Valve
(Font-Seated Closed)
NOTE -A label with specific torque requirements may be
affixed to the stem cap. If the label is present, use the
specified torque.
SERVICE PORT
SERVICE PORT
OPEN TO BOTH
INDOORAND
OUTDOOR UNITS
SERVICE PORT
(VALVE STEM SHOWN OPEN)
INSERT HEX WRENCH HERE
TOINDOOR
UNIT
STEM CAP
TO OUTDOOR UNIT
NOTE- To prevent stripping of the cap, the wrench should
be appropriately sized and fit snugly over the cap before
tightening the cap.
To Access Bali-Type 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 to the service port,
3, When testing is completed, replace service port cap and
tighten as follows:
•With Torque Wrench: Finger tighten and then
tighten per table 1,
• Without Torque Wrench: Finger tighten and use an
appropriately sized wrench to turn an additional
1/6 turn clockwise as illustrated in figure 1,
OPEN TO LINE SET WHEN VALVE IS CLOSED,
TO BOTH LINE SET AND UNIT WHEN VALVE IS
OPEN.
INDOOR UNIT
TO OPEN ROTATE STEM
COUNTERCLOCKWISE 90°.
TO CLOSE ROTATE STEM
CLOCKWISE 90 °.
BALL (SHOWN
CLOSED)
VALVE
STEM
SERVICE CORE
SERVICE PORT CAP
TO OUTDOOR UNIT STEM CAP
Figure 4. Angle-Type Service Valve
(Back-Seated Opened) Figure 5. Bali-Type Service Valve
Page 4
505327M 04/08

To Open and Close Bali-Type Service Valve:
A valve stem cap protects the valve stem from
contamination and assures a leak-free seal,
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°.
3, Replace the stem cap and tighten as follows:
•With Torque Wrench: Finger tighten and then
tighten per table 1,
• Without Torque Wrench: Finger tighten and use an
appropriately sized wrench to turn an additional
1/12 turn clockwise as illustrated in figure 1.
NOTE -A label with specific torque requirements may be
affixed to the stem cap. If the label is present, use the
specified torque.
Remove existing HCFC-22 refrigerant using one of the
following procedures:
METHOD 1:
If the existing outdoor unit is not equipped with shut-off
valves, or if the unit is not operational and you plan to use
the existing HCFC-22 to flush the system,
NOTE -Use recovery machine instructions for specific
setup requirements.
1, Disconnect all power to the existing outdoor unit,
2, Connect to the existing unit a gauge set, clean
recovery cylinder and a recovery machine. Use the
instructions provided with the recovery machine on
how to setup the connections,
3. Remove all HCFC-22 refrigerant from the existing
system, Check gauges after shutdown to confirm that
the entire system is completely void of refrigerant,
RECOVERY MACHINE
CLEAN RECOVERY
MANIFOLD GAUGES
/
OUTDOOR UNIT
Figure 6. Typical Refrigerant Recovery
(Method 1)
NOTE -Use recovery machine instructions for specific
setup requirements.
METHOD 2:
Use this method if the existing outdoor unit is equipped
with manual shut-off valves, and plan on using new
HCFC-22 refrigerant to flush the system,
IMPORTANT: Some system configurations may contain
higher than normal refrigerant charge due to either large
internal coil volumes, and/or long line sets, The following
conditions may cause the compressor to stop functioning:
The following devices could prevent full system charge
recovery into the outdoor unit:
• Outdoor unit's high or low-pressure switches (if
applicable) when tripped can cycled the compressor
OFF.
• Compressor can stop pumping due to tripped internal
pressure relief valve.
• Compressor has internal vacuum protection that is
designed to unload the scrolls (compressor stops
pumping) when the pressure ratio meets a certain
value or when the suction pressure is as high as 20
psig. (Compressor suction pressures should never be
allowed to go into a vacuum. Prolonged operation at
low suction pressures will result in overheating of the
scrolls and permanent damage to the scroll tips, drive
bearings and internal seals),
Once the compressor can not pump down to a lower
pressure due to one of the above system conditions, shut
off the suction valve, Turn OFF the main power to unit and
use a recovery machine to recover any refrigerant left in
the indoor coil and line set,
Perform the following task:
1, Start the existing HCFC-22 system in the cooling
mode and close the liquid line valve.
2. Pump as much of the existing HCFC-22 refrigerant
with the compressor back into the outdoor unit until
you have reached the limitations of the outdoor
system, Turn the outdoor unit main power OFF and
use a recovery machine to remove the remaining
refrigerant in the system,
NOTE -It may be necessary to bypass the Iow pressure
switches if equipped to ensure complete refrigerant
evacuation.
3, When the low side system pressures reach 0 psig,
close the suction line valve,
4, Check gauges after shutdown to confirm that the
valves are not allowing refrigerant to flow back into the
low side of the system,
Perform the following task at the existing outdoor unit:
• Disconnect line set at the service valves,
• Disconnect electrical service at the disconnect switch,
• Remove old outdoor unit,
Page 5 XP13 SERIES

CAUTION
See Unit Dimensions on page 3 for sizing mounting slab,
platforms or supports. Refer to figure 7 for mandatory
installation clearance requirements.
CONTROL PANEL
ACCESS LOCATION
* SEE NOTES BELOW THIS FIGURE FOR FURTHER DETAILS.
Figure 7. Installation Clearances
NOTES:
•Service clearance of 30 in. (762 mm) 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. (914 mm).
• Clearance to one of the remaining two sides may be
12 in, (305 mm) and the final side may be 6 in, (152
mm)"
• 48 in. (1219 mm) clearance required on top of unit.
• A clearance of 24 in. (610 mm) must be maintained
between two units.
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 8.
,NSTALLUN,TAWA
FROMW,NDOWS--'--------------,-II __
LINE SET VIBRATION.
Figure 8. Outside Unit Placement
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 9.
NOTE -If necessary for stability, anchor unit to slab as
described in Stabilizing Unit on Uneven Surfaces on page
7.
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. i_L
_i UILDING
STRUCTURE --1-
MOUNTING
SLAB
GROUNDLEVEL
Figure 9. Slab Mounting at Ground Level
ELEVATING THE UNIT (SMALL-BASE UNITS)
If additional elevation is necessary, raise the unit by
extending the length of the unit support feet. This may be
done by cutting four equal true-cut lengths of Schedule
(SCH) 40, 4" (101.6mm) piping to the height required as
illustrated in figure 10.
Page 6
505327M 04/08

BASE
/
LEG DETAIL
4" (101.6MM)
SCH 40 PIPING
Figure 10. Elevated Slab Mounting using Feet
Extenders (Small Base Units)
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.
The inside diameter of the 4" (101.6mm) piping is
approximately 0.25" (6.35mm) greater than the
pre-installed feet on the unit. Devise a shim that will take up
the space and hold the extenders onto the feet during this
procedure. Small strips of 0.125" (3.175mm) thick
adhesive foam may be used. One or two small 1"
(25.4mm) square strips should be adequate to hold the
extender in place.
ELEVATING THE UNIT (LARGER-BASE UNITS)
Unlike the small-base units which use round support feet,
the larger-base units are outfitted with elongated support
feet as illustrated in figure 11 which uses a similar method
for elevating the unit.
If additional elevation is necessary, raise the unit by
extending the length of the unit support feet. This may be
achieved by using a 2" SCH 40 female threaded adapter.
The specified coupling will fit snuggly into the recessed
portion ofthe feet. Use additional 2"SCH 40 male threaded
adaptors which can be threaded into the female threaded
adaptors tomake 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.
BASE
LEG DETAIL
2"(50.8MM) SCH 40
FEMALE THREADED
ADAPTER
Figure 11. Elevated Slab Mounting using Feet
Extenders (Larger Base Units)
ROOF MOUNTING
Install unit at a minimum of four inches above the surface
of the roof. Care must be taken to ensure weight of unit is
properly distributed over roof joists and rafters. Either
redwood or steel supports are recommended.
,ilk CAUTION
REMOVING PANELS
Remove the Iouvered panels as follows:
1. Remove two screws, allowing the panel to swing open
slightly as illustrated in figure 12.
NOTE -Hold the panel firmly throughout this procedure
2. Rotate bottom corner of panel away from hinge corner
post until lower three tabs clear the slots as illustrated
in figure 12, detail B.
3. Move panel down until lip of upper tab clears the top
slot in corner post as illustrated in figure 12, detail A.
Page 7 XP13 SERIES

INSTALLING PANEL
Install the Iouvered panels as follows:
1. Position the panel almost parallel with the unit as
illustrated in figure 13, detail D with the screw side as
close to the unit as possible.
2. With a continuous motion slightly rotate and guide the
lip of top tab inward as illustrated in figure 12, details
A and C, then upward into the top slot of the hinge
corner post.
3. Rotate panel to vertical to fully engage all tabs,
4. Holding the panel's hinged side firmly in place, close
the right-hand side of the panel, aligning the screw
holes.
5. When panel is correctly positioned and aligned, insert
the screws and tighten.
PANEL SHOWN SLIGHTLY ROTATED TO ALLOW TOP TAB TO EXIT (OR ENTER)
TOP SLOT FOR REMOVING (OR INSTALLING) PANEL.
LIP
\
DETAIL
SCREW
ROTATE IN THIS DIRECTION;
THEN DOWN TO REMOVE
PANEL
J
il C
J
IMPORTANT! DO NOT ALLOW PANELS
TO HANG ON UNIT BY TOP TAB. TAB IS
FOR ALIGNMENT AND NOT DESIGNED
TO SUPPORT WEIGHT OF PANEL.
Figure 12. Removing/Installing Louvered Panels
(Details A, B and C)
HOLD DOOR FIRMLY TO THE HINGED
ANGLE MAY BE TOO SIDE TO MAINTAIN
EXTREME -- _ FULLY-ENGAGED TABS
PREFERRED ANGLE
WITH THE UNIT AS POSSIBLE)
WHILE INSTALLING PANEL.
Figure 13. Removing/Installing Louvered Panels
(Detail D)
STABILIZING UNIT ON UNEVEN SURFACES
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,
With unit positioned at installation site, remove two side
Iouvered panels to expose the unit base pan. Install the
brackets as illustrated in figure 14 using conventional
_ractices; replace the panels after installation is complete.
Slab Side Mounting
Deck Top
Mounting
STABILIZING BRACKET MINIMUM 1
{18 GAUGE METAL- 2" PER SIDE _
WIDTH; HEIGHT AS
REOD,;BENDTOFORM
liI°
FOR EXTRA
STABILITY
ONE BRACKET PER SIDE (MIN.); FOR EXTRA STABILITY,
2 BRACKETS PER SIDE, 2" FROM EACH CORNER.
Figure 14. Installing Stabilizer Brackets
Page 8
505327M 04/08

AIMPORTANT
This section provides information on installation or
replacement of existing line set. If line set are not being
installed then proceed to Brazing Connections on page 10.
If refrigerant lines are routed through a wall, seal and
isolate the opening so vibration is not transmitted to the
building. Pay close attention to line set isolation during
installation of any HVAC system. When properly isolated
from building structures (walls, ceilings, floors), the
refrigerant lines will not create unnecessary vibration and
subsequent sounds. Also, consider the following when
placing and installing a high-efficiency air conditioner.
REFRIGERANT LINE SET
Field refrigerant piping consists of liquid and suction lines
from the outdoor unit (braze connections) to the indoor unit
coil (flare or sweat connections). Use Lennox L15 (sweat,
non-flare) series line set, or use field-fabricated refrigerant
lines as listed in table 2.
Table 2. Refrigerant Line Set
Model Field Connections Recommended Line Set
Liquid Suction Liquid Suction
Line Line Line Line L15 Line Set
-018 L15-41
-024 3/8". 3/4" 3/8" 3/4"
-030 (10 mm) (19 mm) (10 mm) (19 mm) 15 ft, - 50 ft.
(4.6 m - 15 m)
-036
L15-65
-042 3/8". 7/8" 3/8" 7/8"
-048 (10 ram) (22 ram) (10 ram) (22 ram) 15 ft, - 50 ft.
(4.6 m - 15 m)
318". 1-118". 318" 1-1/8" Field
-060 (10 mm) (29 ram) (10 ram) (29 ram) Fabricated
NOTE -When installing refrigerant lines longer than 50
feet, see the Lennox Refrigerant Piping Design and
Fabrication Guidelines, or contact Lennox Technical
Support Product Applications for assistance. Toobtain the
correct information from Lennox, be sure to communicate
the following points:
• Model (XP13) and size of unit (e.g. -060).
• Line set diameters for the unit being installed as listed
in table 2 and total length of installation.
• Number of elbows and if there is a rise or drop of the
piping.
MATCHING WITH NEW OR EXISTING INDOOR COIL
AND LINE SET
The RFCl-metering line consisted of a small bore copper
line that ran from condenser to evaporator coil. Refrigerant
was metered into the evaporator by utilizing
temperature/pressure evaporation effects on refrigerant in
the small RFC line. The length and bore of the RFC line
corresponded to the size of cooling unit.
If the XP13 is being used with either a new or existing
indoor coil which is equipped with a liquid line which served
as a metering device (RFCI), the liquid line must be
replaced prior to the installation of the XP13 unit. Typically
a liquid line used to meter flow is 1/4" in diameter and
copper.
INSTALLING LINE SET
Line Set Isolation--This reference illustrates
procedures, which ensure proper refrigerant line set
isolation:
• Installation of line set on horizontal runs is
illustrated in figure 15.
• Installation of line set on vertical runs is illustrated in
figure 16.
• Installation of a transition from horizontal to
vertical is illustrated in figure 17.
TO HANG LINE SET FROM JOIST OR
RAFTER, USE EITHER METAL STRAPPING
MATERIAL OR ANCHORED HEAVY NYLON
WIRE TIES.
WIRE TIE
(AROUND
ONLY)
STRAPPING MATERIAL
(AROUND SUCTION
LINE ONLY)
8 FEET
TAPE OR
WIRE TIE
STRAP THE SUCTION LINE TO
THE JOIST OR RAFTER AT 8 FEET
METAL INTERVALS THEN STRAP THE
SLEEVE LIQUID LINE TO THE SUCTION
w%O, L,NE
FLOOR JO/STTEO_ .b> __ > >
- I I_1 I1
Figure 15. Refrigerant Line Set: Installing
Horizontal Runs
Page 9 XP13 SERIES

IMPORTANT-REFRIGERANTLINESMUSTNOTCONTACTWALL.
LIQUIDLINE
OUTSIDEWALL SUCTIONLINE
NOTE-SIMILARINSTALLATION
PRACTICESSHOULDBEUSED
IFLINESETISTOBEINSTALLED
ONEXTERIOROFOUTSIDE
WALL.
SUCTIONLINE
WRAPPEDWITH
ARMAFLEX
PIPE
WOODBLOCK
UIDLINE
FIBERGLASS
INSULATION
STRAP
;LEI
IMPORTANT!REFRIGERANT
LINESMUSTNOTCONTACT
STRUCTURE.
Figure 16. Refrigerant Line Set: Installing Vertical
Runs (New Construction Shown)
AUTOMOTIVE
ANCHORED HEAVY NYLON MUFFLER-TYPE HANGER
WIRE TIE OR AUTOMOTIVE
MUFFLER-TYPE HANGER
WALL
STUD
X STRAP LIQUID LINE
TO SUCTION LINE
LIQUID LINE
METAL SLEEVE \ SUCTION LINE - WRAPPED IN
ARMAFLEX
Figure 17. Refrigerant Line Set: Transition from
Vertical to Horizontal
Use the following procedure to braze the line set to the new
air conditioner unit. Figure 18 is provided as a general
guide for preparing to braze the line set to the air
conditioner unit.
_WARNING
,WARNING
1. Cut ends of the refrigerant lines square (free from
nicks or dents). Debur the ends. The pipe must remain
round, do not pinch end of the line.
2. Remove service cap and core from both the suction
and liquid line service ports.
3. Connect gauge low pressure side to liquid line service
valve.
4. 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.
WARNING
5. 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 RFCIV or TXV metering device at the indoor
unit will allow low pressure nitrogen to flow through the
system.)
NOTE -Use silver alloy brazing rods with five or six percent
minimum silver alloy for copper-to-copper brazing or 45
percent silver alloy for copper-to-brass or copper-to-steel
brazing.
6. Braze the liquid line to the liquid line service valve.
Turn off nitrogen flow. Repeat procedure starting at
paragraph 4 for brazing the suction line to the suction
service valve.
Page 10
505327M 04/08

CUTANDDEBUR
INSTALLCOREONLYFOR
BOTHSERVICEPORTSafterthey
havecoolED.
i,_,,IP
REMOVE CAP AND CORE FROM
BOTH LIQUID AND SUCTION
SERVICE PORTS
,4i
outdoor
UNIT
SERVICE PORT MUST BE
OPEN TO ALLOW EXIT
POINT FOR NITROGEN SERVICE
VALVE
INDOOR UNIT
I _ LIQUID LINE SERVICEJ
VALVE q
WRAP /(
SER
VALVE _Z£
Figure 18. Brazing Connections
7. After all connections have been brazed, disconnect 2. Remove any shipping clamps holding the liquid line
manifold gauge set the from service ports and remove
wrapping. Reinstall the service port core for both of the
outdoor unit's service valves.
Remove the existing HCFC-22 refrigerant flow control
orifice or thermal expansion valve 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 parts are necessary for the indoor unit,
order kit 69J46. The kit includes:
• 10 -- Brass nuts for liquid line assemblies
• 20 -- Teflon rings
• 10 -- Liquid line orifice housings
• 10 -- Liquid line assemblies
PISTON
LIQUID LINE ORIFICE HOUSINGS (10)
__ /RETAINER
TEFLON RINGS (20) (_
iRASSNUTS(10,
LIQUID LINE ASSEMBLIES
(INCLUDES STRAINER) (10) LIQUID LINE
ASSEMBLY
Figure 19. 69J46 Kit Components
TYPICAL FIXED ORIFICE REMOVAL PROCEDURE
1. On fully cased coils, remove the coil access and
plumbing panels.
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.
4. Remove and discard fixed orifice, valve stem
assembly if present and Teflon washer as illustrated in
figure 20.
5. Use a field-provided fitting to temporary reconnect the
liquid line to the indoor unit's liquid line orifice housing.
DISTRIBUTOR TUBES
LIQUID LINE ORIFICE HOUSING
D,S& ,B2TOR.."'
VALVE STEM VALVE STEM CAP
TEFLON RING REMOVE AND DISCARD
FIXED VALVE STEM ASSEMBLY
/OR,F,?./(,FPRESENT,
BRASS NUT
d
LIQUID LINE ASSEMBLY
(INCLUDES STRAINER)
(Uncased Coil Shown)
Figure 20. Typical Fixed Orifice Removal
TYPICAL TXV REMOVAL PROCEDURE
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. Disconnect the equalizer line from the TXV equalizer
line fitting on the suction line.
Page 11 XP13 SERIES

4, Remove the suction line sensing bulb as illustrated in
figure 21.
5, Disconnect the liquid line from the TXV at the liquid line
assembly,
TWOPIECE (Uncased Coil Shown)
PATCH PLATE
(UNCASED COIL STUB END
ONLY LIQUID LINE
ORIFICE HOUSING
DISTRIBUTOR
TUBES
SENSING
LINE
/
MALE EQUALIZER LINE /
FITTING J SUCTION
SENSING BULB LINE LIQUID
LINE
Figure 21. Typical TXV Removal
6, Disconnect the TXV from the liquid line orifice housing.
Take care not to twist or damage distributor tubes
during this process,
7, Remove and discard TXV and the two Teflon rings as
illustrated in figure 21,
8, Use a field-provided fitting to temporary reconnect the
liquid line to the indoor unit's liquid line orifice housing,
IMPORTANT
Xk CAUTION
AIMPORTANT
AIMPORTANT
If the original system used:
• HCFC-22 refrigerant, then flush the system using the
procedure provided in this section.
• HFC-410A refrigerant, then proceed to Installing New
Refrigerant Metering Device.
_( _ INVERTED HCFC-22 CYLINDER
CONTAINS CLEAN HCFC-22 TO
BE USED FOR FLUSHING GAUGE
MANIFOLD
LOW HIGH
#
h I PRESSURE PRESSURE
SUCTION LINE
SERVICE VALVE _
EXISTING
OOR
LIQUID LINE SERVICE VALVE
RECOVERY
CYLINDER
CLOSED
RECOVERY MACHINE
NOTE -THE INVERTED HCFC-22 CYLINDER MUST CONTAIN AT LEAST THE SAME
AMOUNT OF REFRIGERANT AS WAS RECOVERED FROM THE EXISTING SYSTEM,
Figure 22. Typical Flushing Connection
REQUIRED EQUIPMENT
Equipment required to flush the existing line set and indoor
unit coil:
• Two clean HCFC-22 recovery bottles,
• Oilless recovery machine with pump-down feature,
• Two gauge sets (one for HCFC-22; one for
HFC-410A),
FLUSHING PROCEDURE
1, Connect the following:
• HCFC-22 cylinder with clean refrigerant to the
suction service valve,
• HCFC-22 gauge set to the liquid line valve,
• Recovery machine with an empty recovery tank to
the gauge set,
2, Set the recovery machine for liquid recovery and start
the recovery machine, Open the gauge set valves to
Page 12
505327M 04/08

allow the recovery machine to pull a vacuum on the
existing system line set and indoor unit coil.
3, 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.
4, 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,
5, 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,
XP13 units use CTXV for metering refrigerant only. This
section provides instructions on installing CTXV
refrigerant metering device,
1/2 TURN
an additional 1/2 turn clockwise as illustrated in figure
23, or 20 ft-lb,
6, Attach the suction line sensing bulb in the proper
orientation as illustrated in figure 25 using the clamp
and screws provided,
TWOPIECE (Uncased Coil Shown)
PATCH PLATE
UNCASED COIL
ONLY) LIQUID LINE
._ORI FIC E STUB END
HOUSING
DISTRIBUTOR CTXV
TUBES. -
MALE EQUALIZER LINE
FITTING (SEE FIGURE 26
FOR FURTHER SUCTION
LINE
SENSING BULB INSULATION IS
REQUIRED IF MOUNTED EXTERNAL
TO THE COIL CASING SEE FIGURE 25
FOR BULB POSITIONING.
LIQUID
LINE
Figure 23. Tightening Distance
TYPICAL CTXV INSTALLATION PROCEDURE
The CTXV unit can be installed internal or external to the
indoor coil. In applications where an uncased coil is being
installed in a field-provided plenum, install the CTXV in a
manner that will provide access for field servicing of the
CTXV. Refer to Figure 24 for reference during installation
of CTXV unit,
1, Remove the field-provided fitting that temporary
reconnected the liquid line to the indoor unit's
distributor assembly,
2, Install one of the provided Teflon rings around the
stubbed end of the CTXV and lightly lubricate the
connector threads and expose surface of the Teflon
ring with refrigerant oil.
3, Attach the stubbed end of the CTXV to the liquid line
orifice housing, Finger tighten and use an appropriately
sized wrench to turn an additional 1/2 turn clockwise
as illustrated in figure 23, or 20 ft-lb,
4, Place the remaining Teflon washer around the other
end of the CTXV. Lightly lubricate connector threads
and expose surface of the Teflon ring with refrigerant
oil,
5, Attach the liquid line assembly to the CTXV. Finger
tighten and use an appropriately sized wrench to turn
Figure 24. Typical TXV Installation
NOTE -Insulating the sensing bulb once installed may be
required when the bulb location is external to the coil
casing.
ON LINES SMALLER THAN
SUCTION LINE 7/8", MOUNT SENSING BULB
AT EITHER THE 3 OR 9
I' '_,,,,- O'CLOCK POSITION.
/
BULB
\
SUCTION LINE
ON 7/8" AND LARGER LINES,
_--,_--"_:",..,_ MOUNT SENSING BULB AT
,. __ EITHER THE 4 OR 8 O'CLOCK
'_ >.,, POSITION. NEVER MOUNT
,,'_,%_ " ON BOTTOM OF LINE.
_'.1,_"Y "_.\\_ i Y _X/
(BULB }'_L I j_ BULB)
NOTE - NEVER MOUNT ON BOTTOM OF LINE.
Figure 25. TXV Sensing Bulb Installation
Page 13 XP13 SERIES

7, Remove and discard either the flare seal cap or flare
nut with copper flare seal bonnet from the equalizer
line port on the suction line as illustrated in figure 26,
IMPORTANT
After the line set has been connected tothe indoor unit and
air conditioner, check the line set connections and indoor
unit for leaks. Use the following procedure to test for leaks:
IMPORTANT
FLARE SEAL --
CAP
I
I
_LARE NUT
COPPER
OR BONNET
J
MALE BRASS EQUALIZER
_ LINE FITTING
SUCTION LINE
Figure 26. Copper Flare Seal Bonnet Removal
8, Connect the equalizer line from the TXV to the
equalizer suction port on the suction line. Finger
tighten the flare nut plus 1/8 turn (7 ft-lbs) as illustrated
in figure 23.
NOTE -To prevent any possibility of water damage,
properly insulate all parts of the TXV assembly that may
sweat due to temperature differences between the valve
and its surrounding ambient temperatures.
See the XP13 Engineering Handbookforapproved CTXV
kit match-ups and application information,
The reference CTXV kits include:
1--CTXV
2 -- Teflon rings
1 -- 1 1/4" wide copper mounting strap for sensing bulb
2 -- #10 hex head bolts and nuts for securing sensing bulb
AND NUTS (2)
@ TEPLON
RINGS (2) /%
COPPER
MOUNTING
STRAP (1)
Figure 27. CTXV Kit Components
WARNING
WARNING
WARNING
1. Connect an HFC-410A manifold gauge set high
pressure hose to the suction valve service port.
(Normally, the high pressure hose is connected to the
liquid line port; however, connecting it to the suction
port better protects the manifold gauge set from high
pressure damage.)
2. With both manifold valves closed, connect the cylinder
of HFC-410A refrigerant to the center port of the
manifold gauge set. Open the valve on the HFC-410A
cylinder (suction only).
3. Open the high pressure side of the manifold to allow
HFC-410A into the line set and indoor unit. Weigh in
a trace amount of HFC-410A. [A trace amount is a
maximum of two ounces (57 g) refrigerant or three
pounds (31 kPa) pressure]. Close the valve on the
HFC-410A cylinder and the valve on the high pressure
side of the manifold gauge set. Disconnect the
HFC-410A cylinder.
Page 14
505327M 04/08

4, Connect a cylinder of dry nitrogen with a pressure
regulating valve to the center port of the manifold
gauge set,
5, Adjust dry nitrogen pressure to 150 psig (1034 kPa).
Open the valve on the high side of the manifold gauge
set in order to pressurize the line set and the indoor unit,
6, After a few minutes, open one of the service valve
ports and verify that the refrigerant added to the
system earlier is measurable with a leak detector,
7, After leak testing disconnect gauges from service
ports,
Evacuating the system of non-condensables is critical for
proper operation of the unit. Non-condensables are
defined as any gas that will not condense under
temperatures and pressures present during operation of
an air conditioning system. Non-condensables and water
suction combine with refrigerant to produce substances
that corrode copper piping and compressor parts,
Xk WARNING
6, When the absolute pressure reaches 23,000 microns
(29.01 inches of mercury), close the manifold gauge
valves, turn off the vacuum pump and disconnect the
manifold gauge center port hose from vacuum pump.
Attach the manifold center port hose to a dry nitrogen
cylinder with pressure regulator set to 150 psig (1034
kPa) and purge the hose. Open the manifold gauge
valves to break the vacuum in the line set and indoor
unit. Close the manifold gauge valves,
7, Shut off the dry nitrogen cylinder and remove the
manifold gauge hose from the cylinder. Open the
manifold gauge valves to release the dry nitrogen from
the line set and indoor unit,
8. Reconnect the manifold gauge to the vacuum pump,
turn the pump on, and continue to evacuate the line set
and indoor unit until the absolute pressure does not
rise above 500 microns (29.9 inches of mercury) within
a 20-minute period after shutting off the vacuum pump
and closing the manifold gauge valves.
9, When the absolute pressure requirement above has
been met, disconnect the manifold hose from the
vacuum pump and connect it to an upright cylinder d
HFC-410A refrigerant, Open the manifold gauge valve
1 to 2 psig in order to release the vacuum in the line set
and indoor unit.
10, Close manifold gauge valves and shut off the
HFC-410A cylinder and remove the manifold gauge
set,
A IMPORTANT
1, Connect manifold gauge set to the service valve ports
as follows:
• low pressure gauge to suction line service valve
• high pressure gauge to liquid line service valve
2, Connect micron gauge,
3. Connect the vacuum pump (with vacuum gauge) to
the center port of the manifold gauge set,
4, Open both manifold valves and start the vacuum
pump.
5. Evacuate the line set and indoor unit to an absolute
pressure of 23,000 microns (29,01 inches of
mercury),
NOTE -During the early stages of evacuation, it is
desirable to close the manifold gauge valve at least once to
determine if there is a rapid rise in sure indicates a
relatively large leak, If this occurs, repeat the leak testing
procedure.
NOTE -The term absolute pressure means the total
actual pressure within a given volume or system, above
the absolute zero of pressure. Absolute pressure in a
vacuum is equal to atmospheric pressure minus vacuum
pressure,
Page 1
If the system is void of refrigerant, clean the system using
the procedure described below,
1. Use nitrogen to pressurize the system and check for
leaks. Repair all leaks.
2, Evacuate the system to remove as much of the
moisture as possible.
3, Use nitrogen to break the vacuum and install a new
filter drier in the system.
4. Evacuate the system again. Then, weigh the
appropriate amount of HFC-410A refrigerant as listed
on unit nameplate into the system.
5, Monitor the system to determine the amount of
moisture remaining in the oil. It may be necessary to
replace the filter drier several times to achieve the
required dryness level. If system dryness is not
verified, the compressor will fail in the future.
In the U,S.A., wiring must conform with current local codes
and the current National Electric Code (NEC). In Canada,
wiring must conform with current local codes and the current
Canadian Electrical Code (CEC),
Refer to the furnace or blower coil installation instructions
for additional wiring application diagrams and refer to unit
nameplate for minimum circuit ampacity and maximum
overcurrent protection size,
1, Install line voltage power supply to unit from a properly
sized unit disconnect switch,
2, Ground the unit at the unit disconnect switch or to
earth ground,
5XP13 SERIES

NOTE -To facilitate conduit, a hole is provided in the
bottom of the control box. Connect conduit to the control
box using a proper conduit fitting.
WARNING I
Wire run length AWG # Insulation type
less than 100' (30m) 18 color-coded, temperature
more than 100' (30m) 16 rating 35°C minimum
NOTE -Units are approved for use only with copper
conductors. Refer to figure 28 for high voltage field wiring
diagram. (A complete unit wiring diagram is located inside
the unit control box cover.)
NOTE -For proper voltages, select thermostat wire gauge
oer the following chart:
3, Install room thermostat (ordered separately) on an
inside wall approximately in the center of the
conditioned area and 5 feet (1.5 m) from the floor. It
should not be installed on an outside wall or where it
can be effected by sunlight, drafts or vibrations,
4. Install low voltage wiring from outdoor to indoor unit
and from thermostat to indoor unit. See figures 30 and
31, (24V, Class II circuit connections are made in the
low voltage junction box.)
THERMOSTAT
|||
J!
20B-ZSO/_I I
A
_ _ _OLASS VOLTAGE
FIELD INSTALLED
LINE VOLTAGE
FIELD INSTALLED
WARNING! - ELECTRIC SHOCK HAZARD. Can cause INJU-
RY or DEATH, Unit must be grounded in accordance with
national and local codes.
z_NOTE - For use with copper conductors only. Refer to unit
rating plate for minimum circuit ampacity and maximum over-
current protection size.
Figure 28. Typical Field Wiring
OUTDOOR
FAN
!I?JPURPLE
T BLACK
ORANGE
RED
L_Ow
COMPRESSOR
CRANKCASE HEATER
BLACK
GROUND
LUG
; F
DEFROST_ !F'_---'_REVERSING
THERMOSTAT _VALVE
ZOB-ZSO/60/I
LZ_- : - IL_
EOUIPMENT
DUAL
CAPACITOR
BLACK
BLACK
r- --
F---_
i_tr-
I II
Ill
----J ii
I
__J
OMCI FAN
OUT II
LO-PS
COMMON
Y_OUT YI
RI-PS
DEFROST CONTROL
FAN
r
L0-PS
YI_OUT
HI-PS
THERMOSTAT
208-250160/I
L2 _
_ LI
I_'GROUND
i [ I i i
Ill I IPRESSURE /
III
II I
HI-PS
-J PRESSURE
DESCRIPTION
(EY COMPONENT
_I COMPRESSOR
Be MOTOR-0UTD00R FAN
CI2 CAPACITOR- DUAL
:MCI CONTROL-DEFROST
_R_.]_IHEATER-COMPRESSOR
(I.-ICONTACTOR-COMPRESSOR
.I VALVE-REVERSING
;4 SWlTCH-HIGHPRESSURE
$6 S_ITCH-DEFROST
_€0 THERNGGTAT-CRANKCASE
_87 SWITCH-LOW PRESSURE
A
NOTE-
FOR USE WITH COPPER CONOUCTORS
ONLY.REFER TO UNIT RATING
PLATE FOR MINIMUM CIRCUIT
AMPACITY AND MAXIMUM OVER-
CURRENT PROTECTION SIZE.
h,
CONNECTION MUST BE JUMPERED WHEN
OPTIONAL SWITCH IS NOT USED
WARNING-
ELECTRIC SHOCK HAZARD,
CAN CAUSE INJURY OR
DEATN_ UNIT MUST BE
GROUNDED IN ACCORDANCE
WITH NATIONAL AND LOCAL CODES.
DENOTES OPTIONAL
COMPONENTS
_LINE VOLTAGE
FIELD INSTALLED
I I CLASS II VOLTAGE
FIELD INSTALLED
Figure 29. Typical Wiring Diagram
Page 16
505327M 04/08

THERMOSTAT
24VPOWER
COMMON
1ST-STAGE
AUXILIARY
HEAT
INDOORUNIT
r__ 24VPOWER
_L _ COMMON
_ 1ST_STAGE
_L
'L. @1 AUXILIARYHEAT
@1
-- @1
INDOOR BLOWER
OUTDOOR UNIT
®1
©1
@1
@1
REVERSING VALVE
COMPRESSOR @1
(SOME CONNECTIONS MAY NOT APPLY. REFER
TO SPECIFIC THERMOSTAT AND INDOOR UNIT,)
Figure 30. Outdoor and Blower Unit Thermostat
Designations
THERMOSTAT
®+
©4 COMMON
@4
@4 ,STSTAGE
AUXILIARY
HEAT
®4
@4
@4
EMERGENCY
HEAT
INDOOR BLOWER
REVERSING VALVE
INDOOR UNIT
®
l-
J
k@"
@
®
COMPRESSOR
OUTDOOR UNIT
\ "-, 24V POWER _
"'. \ COMMON EMERGENCY
"-//_[-- -- HEAT RELAY
OUTDOOR
_ THERMOSTAT
/
1 ST-STAG E
AUXILIARY
HEAT
®
@
(SOME CONNECTIONS MAY NOT APPLY. REFER_O
SPECIFIC THERMOSTAT AND INDOOR UNIT.)
Figure 31. Outdoor and Blower Unit Thermostat
Designations (with emergency heat)
IMPORTANT
1, Rotate fan to check for binding.
2, Inspect all factory- and field-installed wiring for loose
connections.
3, After evacuation is complete, open both the liquid and
vapor line service valves to release the refrigerant
charge contained in outdoor unit into the system.
4, Replace the stem caps and tighten to the value listed
in table 1,
5, Check voltage supply at the disconnect switch. The
voltage must be within the range listed on the unit's
nameplate. If not, do not start the equipment until you
have consulted with the power company and the
voltage condition has been corrected,
6. Set the thermostat for a cooling demand. Turn on
power to the indoor indoor unit and close the outdoor
unit disconnect switch to start the unit.
7. Recheck voltage while the unit is running. Power must
be within range shown on the nameplate,
8, Check system for sufficient refrigerate by using the
procedures listed under Testing and Charging
System,
TESTING AND CHARGING SYSTEM
This system uses HFC-410A refrigerant which operates at
much higher pressures than HCFC-22. The pre-installed
liquid line filter drier is approved for use with HFC-410A
only. Do not replace it with components designed for use
with HCFC-22. This unit is NOT approved for use with coils
which use capillary tubes as a refrigerant metering device,
SETTING UP TO CHECK CHARGE
1, Close manifold gauge set valves. Connect the center
manifold hose to an upright cylinder of HFC-410A,
2. Connect the manifold gauge set to the unit's service
ports as illustrated in figure 2.
•low pressure gauge to vapor service port
• high pressure gauge to liquid service port
COOLING MODE INDOOR AIRFLOW CHECK
Check airflow using the Delta-T (DT) process using the
illustration in figure 32,
HEATING MODE INDOOR AIRFLOW CHECK
Blower airflow (CFM) may be calculated by energizing
electric heat and measuring:
•Temperature rise between the return air and supply air
temperatures at the indoor coil blower unit,
• Measuring voltage supplied to the unit,
• Measuring amperage being drawn by the heat unit(s).
Then, apply the measurements taken in following formula
to determine CFM:
CFM = Amps xVolts x3.41
1.08 xTemperature rise (F)
CALCULATING CHARGE
If the system is void of refrigerant, first, locate and repair
any leaks and then weigh in the refrigerant charge into the
unit, To calculate the total refrigerant charge:
Additional charge
Amount Adjust amount, for specified per
specified variation in line set indoor unit
on length listed on table match-up listed in Total
nameplate in figure 33. tables 3 through 9. charge
+ + =
Page 17 XP13 SERIES

Temp. IDT
ofair 180 24 24 24 23 23 22 22 22 20 19 18 17 16 15
entering,._J78 23 23 23 22 22 21 21 20 19 18 17 16 15 14
indoor _ I _ _
coilOF _jru _ 22 22 21 21 20 19 19 18 17 16 15 14 13
m_174 21 21 21 20 19 19 18 17 16 16 15 14 15 12
_72 20 20 19 18 17 17 16Z_15 14 13 12 11 10
_70 19 19 18 18 17 17 16 15 15 14 13 12 11 10
Wet-bulb °F 57 58 59 60 61 62 63 64 65 66 67 68 69 70 J
n A
,0o INDOOR DRY
BULB
WET
All temperatures are
expressed in °F COIL BULB
1. Determine the desired DT--Measure entering air temperature
using dry bulb (A) and wet bulb (B). DT is the intersecting value of A
and B in the table (see triangle).
2. Find temperature drop across ceil--Measure the coil's dry bulb
entering and leaving air temperatures (A and C). Temperature Drop
Formula: (TDrop) = A minus C.
3. Determine if fan needs adjustment--If the difference between
the measured TDrop and the desired DT (TDropi])T) is within ±3 °, no
adjustment is needed. See examples: Assume DT = 15 and A temp.
= 72°, these C temperatures would necessitate stated actions:
C°TDrop- DT = °F ACTION
53°19 15 = 4 Increase the airflow
58°14 15 = -1 (within +3 °range) no change
62°10 15 = -5 Decrease the airflow
4. Adjust the fan speed--See indoor unit instructions to increase/
decrease fan speed.
Changing air flow affects all temperatures; recheck temperatures to
confirm that the temperature drop and DT are within +3°.
Figure 32. Checking Indoor Coil Airflow Guide
WEIGH
Refrigerant Charge per Line Set Length
Liquid Line Ounces per 5 feet (g per 1.5 m)
Set Diameter adjust from 15 feet (4.6 m) line set*
3/8" (9.5 mm) 3 ounce per 5' (85 g per 1.5 m)
NOTE - *If line length is greater than 15 ft. (4.6 m), add this
amount. If line length is less than 15 ft. (4.6 m), subtract this
amount.
LENNOX
't,__,_7_!_ _'_
M@ululJ
1. Check Liquid and suction line pressures
2. Compare unit pressures with Table 10,
Normal Operating Pressures.
3. Conduct leak check; evacuate as
previously outlined.
4. Weigh in the unit nameplate charge plus
any charge required for line set differences
over feet,
This nameplate is for illustration purposes
only. Go to actual nameplate on outdoor
unit for charge information.
1
SUBCOOUNG2
SATo
LIQ o-
SCo=
Figure 33. Using Weigh In Method
3
4
USE COOLING 5
MODE
60°F (15 °) --
USE HEATING
MODE
Check the airflow as illustrated in figure 32 to be sure the indoor airflow is as required. (Make any air
flow adjustments before continuing with the following procedure,)
Measure outdoor ambient temperature; determine whether to use cooling mode or heating mode to
check charge,
Connect gauge set,
Check Liquid and Vapor line pressures. Compare pressures with Normal Operating Pressures table 10,
(The reference table is a general guide. Expect minor pressure variations. Significant differences may
mean improper charge or other system problem.)
Set thermostat for heat/cool demand, depending on mode being used:
Using cooling mode--When the outdoor ambient temperature is 60°F (15°C) and above. Target
subcooling values in table below are based on 70 to 80°F (21-27°C) indoor return air temperature; if
necessary, operate heating to reach that temperature range; then set thermostat to cooling mode setpoint
to 68°F (20°C). When pressures have stabilized, continue with step 6.
Using heating mode--When the outdoor ambient temperature is below 60°F (15°C). Target subcooling
values in table below are based on 65-75°F (18-24°C) indoor return air temperature; if necessary, operate
cooling to reach that temperature range; then set thermostat to heating mode setpoint to 77°F (25°C). When
pressures have stabilized, continue with step 6.
6 Read the liquid line temperature; record in the LIQ ° space.
7 Read the liquid line pressure; then find its corresponding temperature in the temperature/pressure chart
listed in table 11 and record it in the SAT ° space.
8 Subtract LIQ ° temp. from SAT° temp. to determine subcooling; record it in SC° space.
9 Compare SC° results with table below, being sure to note any additional charge for line set and/or match-up.
10 If subcooling value is greater than shown in tables 3 through 10 for the applicable unit, remove refrigerant;
if less than shown, add refrigerant.
11 If refrigerant is added or removed, repeat steps 6 through 10 to verify charge.
Figure 34. Using Subcooling Method
Page 18
505327M 04/08

Table 3. XP13-018
Target *Add charge
Subcooling
INDOOR MATCHUPS Heat Cool
(+5OF) (+1OF) Ib oz
CBX26UH-018 25 5 1 1
CBX26UH-024 25 5 0 1
CBX27UH-018/024 15 8 0 2
CBX32MV-018/024 30 3 0 0
CBX32MV-024/030 15 8 1 2
Table 4. XP13-024
Target *Add charge
Subcooling
INDOOR MATCHUPS Heat Cool
{±5OF) (±1OF) Ib oz
CBX26UH-024 26 5 0 1
CBX26UH-030 26 3 1 3
CBX27UH-018/024 12 3 0 11
CBX27UH-030 12 3 1 4
CBX32M-030 12 3 0 11
CBX32M-036 12 3 1 4
CBX32MV 018/024 12 6 0 5
CBX32MV 024/030 12 3 0 11
CH33-25A 16 6 0 7
CH33 31A 12 3 0 7
CH33 31B 12 3 0 15
CH33-36A 16 6 0 7
CH33 36B 16 7 0 15
CH33 36C 12 5 0 0
CR33-30, -36 12 4 0 3
CX34 25 12 6 0 5
CX34 31 12 3 0 11
CX34-36 16 7 0 11
Table 5. XP13-030
Target *Add charge
Subcooling
INDOOR MATCHUPS Heat Cool
{±5OF) {±1OF) Ib oz
CBX26UH-030, -036 25 4 0 11
CBX27UH-030 15 4 0 11
CBX27UH-036 15 4 0 11
CBX32M 030, 036 15 4 0 11
CBX32M-042 15 4 0 11
CBX32MV-024/030, -036 15 4 0 11
CH33 25A 20 3 0 8
CH33-31A 15 4 0 11
CH33-31B 20 4 0 11
CH33 36A 20 3 0 8
CH33-36C 15 3 0 11
CH33-42B 20 4 0 11
CR33 30, 36 15 4 0 11
CX34-25 15 3 0 12
CX34-31 15 4 0 11
CX34 36 27 2 0 0
CX34-38 SN# 6007K and after 4 4 0 11
CX34-38 before SN# 6007K 20 4 0 11
CX34_42 27 2 0 0
Table 6. XP13-036
Target *Add charge
Subcooling
INDOOR MATCHUPS Heat Cool
{±5OF) (±1OF) Ib oz
CBX26UH-036 25 5 2 2
CBX27UH-036 10 5 2 2
CBX27UH-042 10 10 2 8
CBX32M 036, 042 10 5 2 2
CBX32MV-036 10 5 2 2
*Amount of charge required in additional to charge shown on unit
nameplate. (Remember to consider line set length difference.)
Target *Add charge
Subcooling
INDOOR MATCHUPS Heat Cool
{±5OF) {±1OF) Ib oz
CH33 31A 10 5 0 2
CH33-31B 10 5 1 0
CH33-36C 10 4 0 0
CH33_42 10 11 2 3
CH33-44, -48 10 11 2 5
CR33-36 10 4 0 1
CR33_48 30 5 2 3
CR33-50/60 30 11 2 5
CX34-38 SN# 6007K and after 5 5 2 2
CX34 38 before SN# 6007K 10 5 2 2
CX34-44/48 10 5 2 2
Table 7. XP13-042
Target *Add charge
Subcooling
INDOOR MATCHUPS Heat Cool
(±5OF) {±1OF) Ib oz
CH23 65 32 6 0 12
CBX26UH-042 32 6 1 2
CBX26UHq348 10 12 4 5
CBX27UH-042 15 5 0 0
CBX27UH-048 15 5 0 0
CBX32Mq336, 042 15 5 0 0
CBX32MV 036 15 5 0 0
CH33-43B 10 12 4 8
CH33_43C 10 6 1 1
CH33_44 10 6 0 16
CH33-48 10 6 1 1
CH33_49C 10 12 3 12
CR33_48 32 5 0 5
CR33-50/60 32 9 2 6
CX34 43 10 6 1 1
CX34 49 10 12 3 7
CX34-50/60 10 6 1 1
CX34 60 10 9 2 6
Table 8. XP13-048
Target *Add charge
Subcooling
INDOOR MATCHUPS Heat Cool
{±5OF) {±1OF) Ib oz
CBX26UH-048 10 11 0 8
CBX26UHq360 5 12 3 8
CBX27UH-048 10 9 0 7
CBX27UH-060 10 9 0 7
CBX32M-048 10 9 0 7
CBX32MV-048 10 9 0 7
C33-43 0 4 0 3
CH33_43C 13 4 0 3
CH33-49C 10 9 0 7
CH33-60 10 7 0 5
CR33_48 36 4 0 0
CR33-50/60, -60 35 7 0 5
CX34-60 10 7 0 5
Table 9. XP13-060
Target *Add charge
Subcooling
INDOOR MATCHUPS Heat Cool
(±5OF) (±1OF) Ib oz
CBX26UH-060 10 9 3 3
CBX27UH-060 10 8 1 12
CBX32MV 060 10 8 1 12
CBX32MV-068 10 9 2 5
CH33 62 10 9 2 7
CR33 60 35 4 0 0
CX34-60 15 4 0 0
CX34 62 10 9 2 1
Page 19 XP13 SERIES

Table 10. Normal Operating Pressures - Liquid +10 and Vapor +5 PSIG*
IMPORTANT
Mode,t-018 b024 L-030 L.038 1.042 1.048 j.080
°F (°C)** Liquid Line Pressure /Vapor Line Pressure
Cooling Operation
65 (18) 228 /140 232 /139 245 /135 251 /134 239 /135 244 /139 248 /129
75 (24) 265 /142 268 /142 284 /137 292 /138 277 /136 283 /141 289 /131
85 (29} 311 /144 317 /144 328 /140 339 /140 321 /139 318 /143 336 /132
95 (35) 350 /147 366 /146 377 /144 392 /143 379 /142 369 /145 385 /133
105 (41) 402 /149 412 /148 429 /145 443 /145 423 /144 420 /148 440 /136
115 (45} 458 /152 464 /152 486 /147 508 /149 484 /147 484 /150 500 /140
Heating Operation
60 (16} 350 /135 331 /130 341 /126 361 /112 376/118 350/124 370/127
50 (10} 328/116 315/109 324/107 331 /106 355/107 323/106 348/105
40 (4.5} 310 /96 299 /89 307 /88 304 /96 336 /89 294 /92 328 /85
30 (-1) 294 /81 283 /72 294 /72 295 /77 325 /74 291 /73 317 /72
20 (-7) 278 /67 267 /55 278 /55 285 /57 309 /60 277 /59 305 /59
*These are most-popular-match-up pressures. Indoor match up, indoor air quafity, and indoor load cause pressures to var_
**Temperature of the air entering the outdoor coil.
Table 11. HFC-410A Temperature (°F) - Pressure (Psig)
°F Psig °F Psig °F Psig °F Psig °F Psig °F Psig °F Psig °F Psig
32 100.8 48 137.1 63 178.5 79 231.6 94 290.8 110 365.0 125 445.9 141 545.6
33 102.9 49 139.6 64 181.6 80 235.3 95 295.1 111 370.0 126 451.8 142 552.3
34 105.0 50 142.2 65 184.3 81 239.0 96 299.4 112 375.1 127 457.6 143 559.1
35 107.1 51 144.8 66 187.7 82 242.7 97 303.8 113 380.2 128 463.5 144 565.9
36 109.2 52 147.4 67 190.9 83 246.5 98 308.2 114 385.4 129 469.5 145 572.8
37 111.4 53 150.1 68 194.1 84 250.3 99 312.7 115 390.7 130 475.6 146 579.8
38 113.6 54 152.8 69 197.3 85 254.1 100 317.2 116 396.0 131 481.6 147 586.8
39 115.8 55 155.5 70 200.6 86 258.0 101 321.8 117 401.3 132 487.8 148 593.8
40 118.0 56 158.2 71 203.9 87 262.0 102 326.4 118 406.7 133 494.0 149 601.0
41 120.3 57 161.0 72 207.2 88 266.0 103 331.0 119 412.2 134 500.2 150 608.1
42 122.6 58 163.9 73 210.6 89 270.0 104 335.7 120 417.7 135 506.5 151 615.4
43 125.0 59 166.7 74 214.0 90 274.1 105 340.5 121 423.2 136 512.9 152 622.7
44 127.3 60 169.6 75 217.4 91 278.2 106 345.3 122 428.8 137 519.3 153 630.1
45 129.7 61 172.6 76 220.9 92 282.3 107 350.1 123 434.5 138 525.8 154 637.5
46 132.2 62 175.4 77 224.4 93 286.5 108 355.0 124 440.2 139 532.4 155 645.0
47 134.6 78 228.0 109 360.0 140 539.0
Page 20
505327M 04/08