LENNOX Package Units(both Units Combined) Manual L0806654

User Manual: LENNOX LENNOX Package Units(both units combined) Manual LENNOX Package Units(both units combined) Owner's Manual, LENNOX Package Units(both units combined) installation guides

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,t,: 2005 Lennox industries inc.
Dallas, Texas, USA

INSTALLATION
INSTRUCTIONS

0( °s

13CHPX SERIES UNITS
PACKAGED HEAT PUMPS (2-5 TONS)
Field trial units
505,136M (38152A071)
10/05

Technical
J LJ _,Publications
Litho

U.S.A.

1 - Assembled packaged heat pump unit
As soon as the unit is received, it should be inspected for
possible damage during transit. If you find any damage,
immediately contact the last carrier.

Ak WARNING
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE

Ak WARNING
Shipping & Packing List .........................
Unit Dimensions ...............................
Parts Arrangement .............................
General .......................................
Requirements ..................................
Location Selection ..............................
Rigging & Setting Unit ..........................
Clearances ....................................
Existing Common Vent Systems ..................
Condensate Drain ..............................
Filters .........................................
Supply & Return Connections ....................
Compressors ..................................
Electrical ......................................
Defrost System ...............................
Unit Start-Up and Operation ....................
Condenser Fan Clearances .....................
Maintenance ..................................

1
2
3
3
4
4
4
4
5
6
6
6
7
7
11
11
12
12

A, CAUTION

A, WARNING

10/05

505136M

[111[[11[1[11[[1[1[1[1111[11111111[[111[
Page 1

[llll[llll[[lllll[llll[l[lll

(

_ 2-1/2 (64)
SUPPLY AIR
/ OP

(70)
--I_

Number
--

DOWN-FLOW
RETURN AIR
OPENING

Center Of
Gravity
FF

Corner Weights

___
CC

in,

Model
13CHPXA-24

125

15.5

28.5

13CHPXA-30

125

15.5

28.5

101

126

105

29.5

13CHPXA-42
13CHPXA-36
13CH PXA-48

108

136

176

140

112

137

177

144

33.5

13CHPXA-60

117

143

184

151

33.5

TOP VIEW

HORIZONTAL
SUPPLY AIR
OPENING

FRONT VIEW

HORIZONTAL
RETURN AIR
OPENING

'_--E---_
D_T

2-3/4 _,
(70)

_, 2-3/4
(70)
j I_D.

--D.K _
BACK

VIEW

ELEOTRIOALINLET

L ---,2-I/2(64)_i

CONDENSATE

END VIEW

DRAIN

END VIEW
A
Model No.

in.

13C H PXAV-24
13CHPXAV-30
13CHPXAV-36

34-1/4

870

65-3/8

1661

36-1/2

927

11-1/4

286

17-1/4

438

508

13C H PXAV-42
13CHPXAV-48
13C H PXAV-60

38-1/4

972

1905

1168

11-1/4

286

19-1/4

489

559

F
Model No.

in.

13CHPXAV-24
13CHPXAV-30
13CHPXAV-36

508

8-1/2

216

20-1/4

514

4-1/2

114

483

13C H PXAV-42
13CHPXAV-48
13C H PXAV-60

559

9-1/4

241

3-1/4

22-1/4

572

102

16-1/4

413

Page 2

COIL

MOTOR
FAN

CONTROL
SECTION
ELE
HEATING SECTION)

COIL

PRESSURE SWITCH

PRESSURE SWITCH
REVERSING

These installation instructions are intended as a general
guide only, for use by an experienced, qualified contractor.

If this unit has been used for heating or cooling of buildings
or structures under construction, the following conditions
must be met or the warranty will be void:

The 13CHPX units are single-package heat pump units
designed for outdoor installation on a rooftop or a slab. The
units are equipped with a transformer and blower control
for applications which do not include electric heat. Electric
heat sections are available for separate order.
The unit must be sized based on heat loss and heat gain
calculations made according to the methods of the Air
Conditioning Contractors of America (ACCA).
The units are shipped assembled. All piping, refrigerant
charge, and electrical wiring are factory-installed and
tested. The units require electric power, condensate drain
and duct connections at the point of installation.
Use of this unit as a construction heater or air conditioner
is not recommended during any phase of construction.
Very low return air temperatures, harmful vapors and
operation of the unit with clogged or misplaced filters will
damage the unit.

Page 3

• A room thermostat must control the unit. The use of
fixed jumpers that will provide continuous heating or
cooling is not allowed.
• A pre-filter must be installed at the entry to the return air
duct.
• The return air duct must be provided and sealed to the
unit.
• Return air temperature range between 55°F (13°C)
and 80°F (27°C) must be maintained.
• Air filters must be replaced and pre-filter must be removed upon construction completion.
• The unit components, duct system, air filters and evaporator coil must be thoroughly cleaned following final
construction clean-up.
• The unit operating conditions (including airflow, cooling operation, and heating operation) must be verified
according to these installation instructions.

Theseunits mustbe installedin accordancewith all
applicable
nationalandlocalsafetycodes.
Theseinstructions
areintended
asa generalguideanddo
notsupersede
localcodesin anyway.Consultauthorities
havingjurisdictionbeforeinstallation.
If components
aretobeaddedtoa unittomeetlocalcodes,
theyaretobe installedat thedealer'sand/orcustomer's
expense.
Theseunitsare designlistedby ULin boththe United
StatesandCanadaasfollows:
• Foruseasa heatpump.
• Foroutdoorinstallation
only.
• Forinstallation
oncombustible
material.

5 - The unit foundation should be raised a minimum of 3"
above finish grade. In areas which have prologed periods of temperature below freezing and snowfall,
elevate the unit above the average snow line. Take
care to allow free drainage of condensate from defrost cycles to prevent ice accumulation. Do not locate the unit near walkways to prevent the possible
icing of surfaces due to defrost condensate.

Exercise care when moving the unit. Do not remove any
packaging until the unit is near the place of installation. An
optional lifting lug kit (92M51) may be purchased
separately for use in rigging the unit for lifting. Spreaders
MUST be used across the top of the unit. Recommended
spreader length: 2, 2-1/2, 3-ton units -- 44"; 3-1/2, 4, 5-ton
units -- 54".

WARNING

Accessory

Lift Kit

Figure 1
Use the following guidelines to select a suitable location for
these units.
1 - Unit is designed for outdoor installation only. Unit must
be installed so all electrical components are protected
from water.
2 - Condenser coils must have an unlimited supply of air.
3 - For ground level installation, use a level pre-fabricated
pad or use a level concrete slab with a minimum thickness of 4 inches. The length and width should be at
least 6 inches greater than the unit base. Do not tie the
slab to the building foundation.
4 - Maintain level within a tolerance of 1/4 inch maximum
across the entire length or width of the unit.

CAUTION
Units may also be moved or lifted with a forklift while still in
the factory supplied packaging.
NOTE - Length of forks must be a minimum of 42 inches.

All units require certain clearances for proper operation
and service. Refer to figure 2 for the clearances required
for combustible construction, servicing, and proper unit
operation.

Page 4

main connected to the common venting system. If the
venting system has been installed improperly, you must
correct the system as indicated in the general venting requirements section.

Service Clearances
3 (156)*
REAR

1 - Seal any unused openings in the common venting system.
2 - Inspect the venting system for proper size and horizontal
pitch. Determine that there is no blockage, restriction,
leakage, corrosion, or other deficiencies which could
cause an unsafe condition.

FRONT

Figure 2

3 - Close all building doors and windows and all doors between the space in which the appliances remaining
connected to the common venting system are located
and other spaces of the building. Turn on clothes dryers and any appliances not connected to the common
venting system. Turn on any exhaust fans, such as
range hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers.

NOTE - Do not permit overhanging structures or shrubs to
obstruct condenser air discharge outlet.

4 - Follow the lighting instructions. Turn on the appliance
that is being inspected. Adjust the thermostat so that
the appliance operates continuously.

In the U.S. units may be installed on combustible floors
made from wood or class A, B, or C roof covering material.
In Canada, units may be installed on combustible floors.
Install the unit so that snow accumulation will not restrict

5 - After the main burner has operated for 5 minutes, test
for leaks of flue gases at the draft hood relief opening.
Use the flame of a match or candle, or smoke from a
cigarette, cigar, or pipe.

the airflow. Allow a required minimum horizontal clearance
of 4 feet from electric meters, gas meters, regulators and
relief equipment. In addtion to the above requirements,
ensure that unwanted ice caused by condensate is not
allowed to accumulate around the unit. Do not locate the

6 - After determining that each appliance connected to the
common venting system is venting properly, (step 3)
return all doors, windows, exhaust fans, fireplace
dampers, and any other gas-burning appliances to
their previous mode of operation.

unit on the side of the building where the prevailing winter
winds could trap moisture, causing it to freeze on the walls
or on overhangs (under eaves).

7 - If a venting problem is found during any of the preceding tests, the common venting system must be modified to correct the problem.

48 (1219)

*Rear clearance is 18" (457) when required for
accessory maintenance.
NOTE - Top Clearance - 36 in. (914 mm)
NOTE - Entire perimeter of unit base requires
support when elevated above mounting surface.

Resize the common venting system to the minimum
vent pipe size determined by using the appropriate
The 13CHPX packaged heat pump may replace an existing furnace which is being removed from a venting system
commonly run with separate gas appliances. In this case,
the existing vent system is likely to be too large to properly
vent the remaining attached appliances.
Conduct the following test while each appliance is operating and the other appliances (which are not operating) re-

Page 5

tables in Appendix G. (These are in the current standards
of
the
National
Fuel
Gas
Code
ANSI-Z223.1/NFPA 54 in the USA, and the appropriate Category 1 Natural Gas and Propane appliances
venting sizing tables in the current standards of the
CSA B149 Natural Gas and Propane Installation
Codes in Canada.)

The13CHPX
unitis equipped
witha 3/4inchFPTcoupling
forcondensate
lineconnection,
Plumbing
mustconformto
local codes, Use a sealingcompoundon malepipe
threads,
Thedrainline mustbeproperlytrappedandroutedto a
suitabledrain.Seefigure3 forproperdrainarrangement,
The drainline mustpitchto an opendrainor pumpa
minimumof 1 inchper10feetto preventcloggingof the
line,Sealarounddrainconnection
withsuitablematerialto
preventairleakageintoreturnairsystem.
Drainpipingshouldnotbesmallerthandrainconnection
at
coil.Anopenventindrainlinewillsometimesberequired
dueto line length,frictionand staticpressure.Drains
shouldbeconstructed
ina mannertofacilitate
futurecleaning,
NOTE - The condensate drain fine MUST be trapped to
provide proper drainage,

Filters must always be installed ahead of evaporator coil
and must be kept clean or replaced, Dirty filters will reduce
the airflow of the unit, Filter sizes are shown in table 1.
Table 1
Unit Filter Size
Unit Model
-24, -30, -36
-42, -48, -60

Filter Size
20 in. X 25 in.
16 in. X 25 in.

Filter Quantity
1
2

The duct system should be designed and sized according
to the methods in Manual Q of the Air Conditioning
Contractors of America (ACCA).
A closed return duct system shall be used. This shall not
preclude use of economizers or outdoor fresh air intake, It
is recommended that supply and return duct connections
at the unit be made with flexible joints,
The supply and return air duct systems should be
designed for the CFM and static requirements of the job,

CAUTION

Typical Condensate

accommodate the use of 1". 2" or 4" filters. If the optional
filter kit is not used, a filter must be field-installed,

They should NOT be sized by simply matching the
dimensions of the duct connections on the unit.
Ducting installed outdoors
waterproofed.

Drain

MUST be insulated and

CAUTION
1 in. (25 ram) per
10' (3 m) of line
Minimum

Pitch

open

VTt
II

The 13CHPX unit is shipped ready for horizontal air
discharge (side duct connections). If bottom air discharge
is desired, the covers must be removed from the supply
and return air openings on the bottom of the unit and
re-installed to cover the side openings.
Removing Supply and Return
Air Opening Covers

Trap must be deep enough

to offset maximum

static difference(Generally,3 inches minimum),
Figure

mounting
frame

®
®

Filters are not factory-supplied with the unit; however,
optional internally installed filter kits are available. Filter kit
92M54 is used with 2, 2-1/2 and 34on units. Filter kit 92M55
is used with 3-1/2, 4 and 5-ton units. The filter kits

Page 6

1. Remove screw and lift.
2. Slide cover to free back pin.

Figure

Base-_

Units are shipped with the compressormountings
factory-adjusted
andreadyforoperation,

CONDUCTORS ONLY. Each unit must be wired with a
separate branch circuit and be properly fused.

WARNING

All wiring should be done in accordance with the
current National Electric Code ANSI/NFPA No. 70 in the
United States. In Canada, wiring must be done in
accordance with the current CSA C22.2 Part 1. Local

CAUTION

codes may take precedence.
Use wiring with a temperature limitation of 75_C min.; run
the 208 or 230 volt, 60 hertz electric power supply through a
fused disconnect switch to control box of unit and connect
as shown in the wiring diagram located on the inside of the
control access panel. Refer to figure 5 for electrical access.

WARNING

E ectricaJ Access

See figure 7 for typical field wiring connections and figure 8
for typical unit wiring diagram.
Optional

EnVy

Electric

Heat

Optional electric heat is available and must be purchased
separately. Install the electric heat section as outlined in the
installation instructions packaged with the electric heat
section,

Thermostat

Enlry

The room thermostat should be located on an inside wall

Figure 5
Unit must be electrically grounded in accordance with local
codes or in the absence of local codes with the National
Electric Code, ANSI/NFPA No. 70 (latest edition) or CSA
C22.2 Part 1 (latest edition).
Power supply to the unit must be N.E,C, Class 1, and must
comply with all applicable codes. A fused disconnect
switch should be field provided for the unit, The switch must
be separate from all other circuits, If any of the wire
supplied with the unit must be replaced, replacement wire
must be of the type shown on the wiring diagram.
Electrical wiring must be sized to carry minimum circuit
ampacity
marked
on the
unit,
USE COPPER

where it will not be subject to drafts, sun exposure or heat
from
electrical
fixtures
or
appliances.
Follow
manufacturer's instructions enclosed with thermostat for
general installation procedure, Color coded insulated wires
(# 18 AWG) should be used to connect thermostat to unit,
Six wires are required for heat pump operation (including a
common wire, if required by the thermostat).
Blower

Control

Board

The circulating air blower is controlled by a blower control
board located in the unit control box. Blower operation is
NOT delayed after a call for either heating or cooling, A
blower "off" delay of 90 seconds begins when the
thermostat demand is satisfied. These delays are not
adjustable. See figure 6.

Page 7

Blower

Drive Control

dl]d3

IdS

RiO

i)°<_>
R4

R6
3

RS @
R5

R1
RII

OWl

C3_

_N_X

_:X

@
1005

Figure

Typical Single-Phase Unit Wiring Connections
THE_X_T_

[]

_N_LLED

-JJ_

Figure

Page 8

_D_JMD

175

HSC]

13CHPX

Series Packaged

Heat Pump Units

Typical Wiring Diagram

SL01_S

SidES

COOL
t_ IWPUT
24

DER.AY

CHANT

No Pwer to Collrol

(SLK)
LO_I

30
36

WED
HtGH

42
48

LOW
M£D

HIGH

#orm]

0_ercttio_

Control

Anli-Stort
Lll
LOl
Hig_

MOTOR
_PEED

mll_lOFF

POle(

SlillS
Slttcl

Prll$lre

Dittos

Alter.to

mlllOFF

$1ol FIo:h

OfF

SlowFlesh

OFF

Loltoet

High Presllfe Switch tolkolt

THERMOSTAT

Slol Flash

OFF

fa.lf

F(IIII

]

Slm_ltoleo. Slol Flock

Cycle Lo¢IoII

Prt$1ufl
Pfllllrl

Note: Becausethe Pro:sure Switckes ore mnitored only w_ea"Yl" ttiput) i: Derive, the code
,f°r _re.ure switch,ope_will..t
he _ee_ _hea "_1" is off. I.teod, tke "NoremlOperotion" or
hat_ _h_rt Cyde codeIfll be sell.

S_ "-''-_'-''----

lEOe';

Also, ehel • prosperoGlitch ope..d
co_sedo short eych Iockoet. tie pro.ere seitch*o en
codelilt be Sell ntil
if doses, thee tke short cycle Iockoet (ode ill] tioGAenllsl it _S oireody
expired.

(')

(,) ®t

TAT
WI&
12 CAN
GS USSD
TO
ELECTRIC
HEAT
ACCESSORY
IS & SONWWODELS

P-S

P*I

@----t,.

S,
7.6
& IOKW HEATER
_UNCTiON
_F
WI ONLY,

STAGE
ON

ACCSSSORISS

ILl

Kl-I

GLOII'_R
CONTROL

( _

GRN

P-S

r,Q
>

P-5

CONTACTOR

r.O

YEL

O0
UEFMOST
DUAL
CONTROL _i
CAPACITOR
208/23

FAN

i
C4_

V-I-60
CAPACI TOR

F-

R[V,

VALVE

RL_
MOTOR

,,,.ss, _
S_'rEH $79

r-- NPS,_

o[reOSTS 6 ._---T*STAT_ /O-------

OF
-Z4V

COMPRESSOR
YI OUT

.nc,

CONDENSER

ToR

COMPRESSOR
CONTACTOR

P-2

(IF USES)

"_T-PSz_

A15
_L

NOTE:
iF ANY OF THE ORIGINAL
WIRE iS REPLACED THE
SAME SIZE AND TYPE WIRE
MUST BE USED.
USE COPPER CONDUCTOR
ONLY, HIE 7_C WIRE

LINE VOLTAGE FIELD

P-4
z_CONNECTION
MUST
BE JUMPERED
WHEN PRESSURE
SWITCH
IS NOT USED,

INSTALLED

WARNINGELECTRIC DHOCN HAZARD. UNIT
MUST BE GROUNDED IN ACCORDANCE
WITH NATIONAL AND LOCAL CODES.

13CHPX units are equipped with a defrost control board
that includes the combined functions of time/temperature
defrost control, defrost relay, diagnostic LEDs and a low
voltage terminal strip. See figure 9.
The control provides automatic switching from normal
heating operation to defrost mode and back. During the
compressor cycle (call for defrost), the control accumulates compressor run time at 30, 60 or 90-minute field-adjustable intervals. If the defrost thermostat is closed when
the selected compressor run time interval ends, the defrost
relay is energized and the defrost begins.
The defrost timing jumper is factory-installed to provide a
60-minute defrost interval. If the timing selector jumper is
not in place, the control defaults to a 90-minute defrost interval. The maximum defrost period is 14 minutes and is
not adjustable. See figure 9 for the location of the defrost
interval timing pins.
A test option is provided for troubleshooting. The test
mode may be started any time the unit is in the heating
mode and the defrost thermostat is closed or jumpered. If
the jumper is in the TEST position at power up, the control
will ignore the test pins. When the jumper is placed across
the TEST pins for 2 seconds, the control will enter the defrost mode. If the jumper is removed before an additional
5-second period has elapsed (7 seconds total), the unit
will remain in defrost mode until the defrost thermostat
opens or 14 minutes have passed. If the jumper is not removed until after the additional 5-second period has
elapsed, the defrost will terminate and the test option will
not function again until the jumper is removed and reapplied.
The defrost control board includes a compressor
delay
function which cycles the compressor off for 30 seconds
while going into and coming out of the defrost cycle. This
function is activated when the jumper is removed from the
compressor delay pins.
NO TE -- The 30-second compressor delay is not functional when the TEST pins are jumpered.

The defrost thermostat is located on the liquid line between the check/expansion
valve and the distributor.
When the defrost thermostat senses a liquid line temperature of 42°F or cooler, the thermostat contacts close and
send a signal to the defrost control board to begin the defrost timing. The defrost thermostat also terminates the
defrost when the liquid line temperature warms to 70°F.
The defrost control board includes HI-PS and LO-PS terminals to receive signals from the unit high pressure
switch and loss of charge switch.
During a single demand cycle, the defrost control locks
out compressor operation after the fifth time that the circuit is interrupted by any pressure switch wired to the control board. In addition, the diagnostic LEDs indicate a
locked-out pressure switch after the fifth open pressure
switch occurrence.
Compressor
operation
remains
locked out until power to the board is interrupted, then reestablished, or until the jumper is applied to the TEST pins
for 0.5 seconds.
NOTE -- The defrost control board ignores input from the
loss of charge switch terminals as follows:
During the test mode;
During the defrost cycle;
During the 90-second start-up period;
During the first 90 seconds following
a reversing valve switch between the
heating and cooling modes.
EXCEPTION -- ff the TEST pins are jumpered and the
5-minute delay is being bypassed, the LO-PS terminal
signal is not ignored during the 90-second start-up period.
The defrost control board includes two diagnostic
LEDs. LED codes indicate operating status. The diagnostics codes are given in table 2.
Defrost

Control

FAll

Test Pins
_Diagnostic
LEDs

Compressor
Delay Pins

Green LED
(DS2)

Red LED
(DS1)

No power to
board
Normal
Operation /
Power to Board

OFF

LO*PS

Slow Flash

Alternating Slow Flash

Loss of Charge
Pressure Switch
Fault

OFF

Slow Flash

Loss of Charge
Pressure Switch
Lockout

OFF

High Pressure
Switch Fault

Slow Flash

OFF

High Pressure
Switch Lockout

OFF

24V Terminal
Strip
Connections

Defrost T'stat j

Simultaneous

Anti-Short Cycle
Lockout

Reversing Valve Low Pressure/
Loss of Charge -Switch

LEDs

Mode

Defrost Control Board
Defrost Interval
Timing Pins

Table 2
Board Diagnostic

High Pressure i
Switch

Figure 9
Page 10

Each13CHPXpackagedheatpumpis factory-charged
with R-410Arefrigerant.
Thecompressor
is hermetically
sealed, internallysprung and base-mountedwith
rubber-insulated
hold-down
bolts.
Pre-Start

Check

List:

1 - Make sure refrigerant lines do not rub against the cabinet or each other.
2-

The thermostat also closes the "R" to "G" circuit to energize
the circulating air blower. When the cooling demand is
satisfied, the thermostat opens the circuits, as well as the
compressor contactor. The compressor and outdoor fan
immediately stop. The circulating air blower continues
operating through a 90-second delay.
Unit compressors have internal protection. If there is an
abnormal rise in the compressor temperature,
the
protector will open and the compressor will stop.
Heating

Inspect all electrical wiring, both factory- and fieldinstalled, for loose connections.

Sequence

of Operation

4 - Recheck voltage with unit running. If power is not within the range listed on the unit nameplate, stop the unit
and consult the power company. Check unit amperage. Refer to unit nameplate for correct running amps.

When the thermostat calls for heating, the "R" to "Y" circuit
is closed to energize the compressor contactor. The
contactor brings on both the compressor and outdoor fan.
The reversing valve is not energized in the heating mode.
The thermostat also closes the "R" to "G" circuit to energize
the circulating air blower. When the heating demand is
satisfied, the thermostat opens these circuits, as well as
the compressor contactor. The compressor and outdoor
fan immediately stop. The circulating air blower continues
operating through a 90-second delay.

5 - Make sure filter is in place before unit start-up.

System

6 - Before placing the unit into full operation, energize the
unit for three false starts. Energize the compressor
just long enough for it to make a few revolutions, wait
five to seven minutes before repeating a second and
third time.
of Operation

Verify system performance using table 3 and table 4 as a
general guide. Minor variations in these pressures may be
expected due to differences in installations. Significant differences could mean that the system is not properly
charged or that a problem exists with some component in
the system.

When the thermostat calls for cooling, the "O" circuit is
energized to activate the reversing valve. The "R" to "Y"
circuit is closed to energize the compressor contactor. The
contactor brings on both the compressor and outdoor fan.

Used carefully, these tables could serve as a useful service
guide. Data is based on 80°F dry bulb / 67°F wet bulb return
air. Allow unit operation to stabilize before taking pressure
readings.

3 - Check voltage at the disconnect switch. Voltage must
be within the range listed on the unit nameplate. If not,
consult power company and have voltage condition
corrected before starting unit.

Cooling

Sequence

Table
Cooling

Mode -- Normal

80°F db / 67°F wb RETURN AiR
UNIT
13CHPX-24

3
Operating

Pressures

Air Temperature Entering Outdoor Coil

(°F)

65
143

70
144

75
146

80
147

82
148

85
149

90
150

95
152

100
153

105
154

110
156

115
157

140
142

141
143

142
144

144
145

145
146

146
146

147
147

149
148

150
149

152
150

153
151

135
142

136
143

138
145

139
146

140
147

141
148

143
149

144
151

147
152

149
153

151
155

154
156

13CHPX-60
13CHPX-24

137
222

138
244

140
265

141
288

142
297

143
311

145
333

146
354

148
379

149
397

151
424

153
447

13CHPX-30
13CHPX-36
13CHPX-42

229
246
231

251
269
251

273
291
271

295
314
291

304
323
299

318
337
313

341
360
335

361
382
351

387
407
380

406
426
398

434
454
425

457
478
448

13CHPX-48

236

259

282

305

314

328

351

374

397

415

443

466

13CHPX-60

246

271

296

322

332

347

373

398

424

444

475

500

13CHPX-30
13CHPX-36
13CHPX-42
13CHPX-48

PRESSURE

Performance

Suction

Liquid

Page 11

Table 4
Heating
70°F RETURN AIR
UNIT
PRESSURE
13CHPX-24
13CHPX-30
13CHPX-36
13CHPX-42
13CHPX-48

Suction

13CHPX-60
13CHPX-24
13CHPX-30
13CHPX-36
13CHPX-42
13CHPX-48
13CHPX-60

Liquid

Mode -- Normal Operating

Pressures

0
37
32
32
33
32
30
283
273
259
300

5
44
40
39
41
39
37
291
281
266
309

10
52
47
47
49
47
44
300
290
273
319

Air Temperature Entering Outdoor Coil
15
20
25
30
35
40
62
66
74
81
88
96
58
63
70
78
86
93
57
61
69
76
83
91
60
65
73
80
88
96
57
62
69
77
84
92
54
58
65
73
80
87
312
317
326
335
343
352
301
306
314
322
330
339
283
287
294
302
309
316
332
338
347
357
366
376

279
318

284
328

291
339

302
353

The top of the condenser fan should be 1-1/2 inchs from the
bottom of the top grille. This dimension should be checked
and the fan should be adjusted accordingly any time servicing of the outdoor fan system is required.

Periodic inspection and maintenance normally consists of
changing or cleaning filters and (under some conditions)
cleaning the main burners.
Filters
Not supplied. Inspect once a month. Replace disposable or
clean permanent type as necessary. DO NOT replace permanent type with disposable.

307
359

314
370

322
380

330
390

337
401

(°F)
45
106
104
101
107
102
97
364
350
326
389

50
110
109
105
112
107
101
369
355
330
395

55
118
116
113
120
114
108
378
363
337
404

60
125
124
120
127
122
116
387
371
345
414

348
415

353
421

360
432

368
442

Motors
Indoor, outdoor fan and vent motors are permanently
lubricated and require no further lubrication. Motors
should be cleaned yearly to prevent the accumulation of
dust and dirt on the windings or motor exterior.
Coil
Dirt and debris should not be allowed to accumulate on the
coil surfaces or other parts in the air conditioning circuit.
Cleaning should be performed as often as necessary. Use
a brush, vacuum cleaner attachment, or other suitable
means. If water is used to clean the coil, be sure the power
to unit is shut off prior to cleaning.
NOTE - Care should be used when cleaning the coil so that
the coil fins are not damaged.
Do not permit the hot condenser air discharge to be obstructed by overhanging structures or shrubs.

Accessories
LENNOX Cat.
Number
92M54
92M55

Description
Filter Kit (2-ton to 3-ton capacity units)
Filter Kit (3-1/2-ton to 5-ton capacity units)

Page 12

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LENNOX Package Units(both Units Combined) Manual L0806654

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