Lennox 13HPP Installation guide

Brand: Lennox

Model: 13HPP

Category: Split-system air conditioners

Type: Installation guide

06/11

*2P0611* Page 1

506750−01

*P506750-01*

RETAIN THESE INSTRUCTIONS

FOR FUTURE REFERENCE

E 2011 Lennox Industries Inc.

Dallas, Texas, USA

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.

WARNING

If this unit is to be installed in a mobile or manufactured

home application, the duct system must be sized to

achieve static pressures within the manufacturer’s

guidelines. All other installation guidelines must also be

followed. Failure to do so may result in equipment

damage, personal injury and improper unit performance.

WARNING

Electric shock hazard. Can cause injury

or death. Before attempting to perform

any service or maintenance, turn the

electrical power to unit OFF at disconnect

switch(es). Unit may have multiple power

supplies.

INSTALLATION

INSTRUCTIONS

13HPP UNITS

PACKAGED HEAT PUMP UNIT (2−5 TONS)

506750−01

06/11

Supersedes 03/11

TABLE OF CONTENTS

Shipping and Packing List 1. . . . . . . . . . . . . . . . . . . . .

Unit Dimensions − inches (mm) 2. . . . . . . . . . . . . . . . .

Parts Arrangement 3. . . . . . . . . . . . . . . . . . . . . . . . . . . .

General 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Use of Unit as a Construction Heater or

Air Conditioner 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Requirements 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Location Selection 4. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Rigging and Setting Unit 4. . . . . . . . . . . . . . . . . . . . . . .

Clearances 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Optional Electric Heat 6. . . . . . . . . . . . . . . . . . . . . . . . .

Existing Common Vent Systems 6. . . . . . . . . . . . . . . .

Thermostat 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Condensate Drain 8. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Air Filters 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Supply and Return Duct Connections 8. . . . . . . . . . .

Compressors 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Blower Speed Settings and Performance Data 9. . . .

Start−Up 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

System Operation 13. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Defrost System 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

System Performance 14. . . . . . . . . . . . . . . . . . . . . . . . . .

Maintenance 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Planned Service 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Shipping and Packing List

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.

CAUTION

Danger of sharp metallic edges. Can cause injury. Take

care when servicing unit to avoid accidental contact with

sharp edges.

Litho U.S.A.

Page 2

Unit Dimensions − inches (mm)

BACK VIEW

TOP VIEW

RIGHT SIDE

LEFT SIDE

Coil Access

Panel Condensate Drain

3/4 NPT

Return

Supply

Return

4 (102)

1−5/8 (16)

5−1/2

(140)

Power Supply

1−1/8 (29)

Low Voltage Entry

7/8 (22)

Blower

Access

Panel

Riggig Hole (8)

2 (51)

Electric Heat

Power Entry

Model No. A B C D E F G

in mm in mm in mm in mm in mm in mm in mm

13HPP24A

13HPP30A

13HPP36A

32−1/2 826 46−1/2 1181 46−1/2 1181 45−5/8 1159 45−5/8 1159 17−1/2 445 11−1/2 292

13HPP42A

13HPP48A

13HPP60A

34−1/2 876 55−1/2 1410 50−1/2 1283 54−5/8 1387 49−5/8 1260 21−1/2 546 12 305

Model No. H J K L M N P

in mm in mm in mm in mm in mm in mm in mm

13HPP24A

13HPP30A

13HPP36A

4 102 4 102 1−3/4 44 15−5/8 397 27−3/4 705 24−7/8 857 9−3/4 248

13HPP42A

13HPP48A

13HPP60A

6−1/4 159 5−5/8 143 2−3/8 60 17−1/8 435 29−3/4 756 26−7/8 661 15−1/2 394

Page 3

Parts Arrangement

OUTDOOR FAN

OUTDOOR

COIL

COMPRESSOR

DEFROST CONTROL

HEATER COVER (FOR

OPTIONAL ELECTRIC HEAT)

CAPACITOR

CONTACTOR

BLOWER MOTOR

BLOWER

TRANSFORMER

ELECTRIC HEAT SECTION

(ORDERED SEPARATELY)

GRILLE

INDOOR COIL

Figure 1. Parts Arrangement

General

These installation instructions are intended as a general

guide only, for use by an licensed professional installing

contractor (or equivalent).

The 13HPP units are single−package heat pump units

designed for outdoor installation on a rooftop or a slab.

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 Unit as a Construction Heater or

Air Conditioner

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.

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:

SA room thermostat must control the unit. The use of

fixed jumpers that will provide continuous heating or

cooling is not allowed.

SA pre−filter must be installed at the entry to the return

air duct.

SThe return air duct must be provided and sealed to the

unit.

SReturn air temperature range between 55°F (13°C)

and 80°F (27°C) must be maintained.

SAir filters must be replaced and pre−filter must be

removed upon construction completion.

SThe unit components, duct system, air filters and

evaporator coil must be thoroughly cleaned following

final construction clean−up.

Page 4

SThe unit operating conditions (including airflow,

cooling operation and heating operation) must be

verified according to these installation instructions.

Requirements

These units must be installed in accordance with all

applicable national and local safety codes.

These instructions are intended as a general guide and do

not supersede local codes in any way. Consult authorities

having jurisdiction before installation.

If components are to be added to a unit to meet local codes,

they are to be installed at the dealer’s and/or customer’s

expense.

These units are design−listed by ETL in both the United

States and Canada as follows:

SFor use as a heat pump unit.

SFor outdoor installation only.

SFor installation on combustible material.

WARNING

Product contains fiberglass wool.

Disturbing the insulation in this product during installa-

tion, maintenance, or repair will expose you to fiberglass

wool dust. Breathing this may cause lung cancer. (Fiber-

glass wool is known to the State of California to cause

cancer.)

Fiberglass wool may also cause respiratory, skin, and

eye irritation.

To reduce exposure to this substance or for further infor-

mation, consult material safety data sheets available

from address shown below, or contact your supervisor.

Lennox Industries Inc.

P.O. Box 799900

Dallas, TX 75379−9900

Location Selection

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 3 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 (6.35mm)

maximum across the entire length or width of the unit.

The heat pump unit foundation should be raised to a

minimum of 3 inches (75mm) above finish grade. In areas

which have prolonged periods of temperature below

freezing and snowfall, the heat pump unit should be

elevated above the average snow line. Extra precaution

should be taken to allow free drainage of condensate from

defrost cycles to prevent ice accumulation. The unit should

not be located near walkways to prevent possible icing of

surface from defrost condensate.

Rigging and Setting Unit

Exercise care when moving the unit. Do not remove any

packaging until the unit is near the place of installation.

Spreaders whose length exceeds the largest dimension

across the unit MUST be used across the top of the unit.

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

(1067mm).

This unit is shipped with four corner brackets in place on the

underside of the unit (see figure 2). The two rear corner

brackets must be removed before unit is installed on a

field−provided roof curb assembly, provided curb is a split

level design.

NOTE  Heat pumps are designed to drain water during

the defrost cycle through holes in the base that are located

under the outdoor coil. In downflow applications, proper

clearances and/or drainage collection/management may

be required at installation to ensure water does not enter

structure.

Return Supply

REAR

CORNER

BRACKET

REAR

CORNER

BRACKET

REMOVE REAR CORNER BRACKETS BEFORE INSTALLING ON ROOF

CURB. LEAVE FRONT CORNER BRACKETS ON UNIT FOR SUPPORT.

FRONT

CORNER

BRACKETS

FRONT

CORNER

BRACKET

Figure 2. Corner Brackets

CAUTION

Before lifting a unit, make sure that the weight is

distributed equally on the cables so that it will lift evenly.

Units may also be moved or lifted with a forklift while still in

the factory−supplied packaging.

Page 5

Clearances

All units require certain clearances for proper operation

and service. Refer to figure 3 for the clearances required

for combustible construction, servicing, and proper unit

operation.

NOTE  TOP CLEARANCE UNOBSTRUCTED  MINIMUM 48" (1219)

24 (610)

(610)

24 (610)

0 (0)

Figure 3. Clearances  Inches (MM)

Electrical

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

codes may take precedence.

Use wiring with a temperature limitation of 75_C minimum.

Run the 208 or 230 volt, 60 hertz electric power supply

through a disconnect switch to unit control box and connect

as shown in the wiring diagram located on the inside of the

control access panel. Electric power supply must be

properly protected with either a fuse or circuit breaker, see

unit nameplate.

Unit must be grounded with a separate ground conductor.

See figure 4 for typical field wiring connection. The wiring

diagram can be found on the unit inside the access panel.

Low voltage control wiring are pigtail leads located on the

main control box and are color−coded to match the

connection called out on the wiring schematic.

Power supply to the unit must comply with all applicable

codes and NEC or CEC. 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

CONDUCTORS ONLY. Each unit must be wired with a

separate branch circuit and be properly protected with a

fuse or circuit breaker, see unit nameplate.

WARNING

Unit is equipped with a single−pole contactor. Line

voltage is present at all components when unit is not in

operation. Disconnect all remote electric power supplies

before opening access panel. Unit may have multiple

power supplies. Failure to disconnect all power supplies

could result in personal injury or death.

CAUTION

When connecting electrical power and control wiring to

the unit, waterproof type connectors MUST be used so

that water or moisture cannot be drawn into the unit dur-

ing normal operation.

WARNING

Unit must be grounded in accordance with national and

local codes. Failure to ground unit properly can result in

personal injury or death.

See figure 4 for typical field wiring connections and figure 5

for typical unit wiring diagram.

If the optional electric heat section is installed, the electric

heat section requires a separate electrical power supply

with a disconnect and is properly protected with either a

fuse or circuit breaker.

IF 208 VOLT IS SUPPLIED, TRANSFORMER CONNECTIONS MUST BE CHANGED.

CONTACTOR

GROUND LUG

FIELD−SUPPLIED FUSED

OR CIRCUIT BREAKER

DISCONNECT

SINGLE−PHASE

POWER SUPPLY

Figure 4. 208/230 Line Voltage Wiring

Page 6

Optional Electric Heat

Optional electric heat is available and must be purchased

separately. Install the electric heat section as outlined in

the electric heat installation instruction included with heat

section.

Follow the basic steps listed below to install the electric

heat section. Refer to the electric heat installation

instruction for specific wiring/ heater configuration.

1. Disconnect the power and open the main control

access.

2. Disconnect the plug separating the high voltage wire

harness. Remove the high voltage wire harness plug

and discard.

3. Remove the heater block cover by removing the four

screws holding it in place. Cut away the insulation

covering the opening, using the hole in the panel as a

template.

4. Insert the heater into the control panel and fasten in the

same mounting holes.

5. Plug the heater wiring harness into the wire harness on

the control assembly. Field wiring of the auxiliary

heater is separate from the unit power supply. Wire the

power supply wiring for the heater to the appropriate

connections on the heater kit.

Table 1. Electric Heat Kits (208/240V−1ph)

Heater Model Lennox Catalog Number

5 kW 40K65

7 kW 40K66

10 kW 40K67

15 kW 40K68

20 kW 40K69

Existing Common Vent Systems

The 13HPP packaged heat pump may be used to replace

an existing gas 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) remain connected to the common venting

system. If the venting system has been installed

improperly, you must correct the system.

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.

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.

4. Follow the lighting instructions. Turn on the appliance

that is being inspected. Adjust the thermostat so that

the appliance operates continuously.

5. After the main burner has operated for five minutes,

test for leaks of flue gases at the draft hood relief

opening. Use the flame of a match or candle.

6. After determining that each appliance connected to the

common venting system is venting properly, (step 3)

return all doors, widows, exhaust fans, fireplace

dampers, and any other gas−burning appliances to

their previous mode of operation.

7. If a venting problem is found during any of the

preceding tests, the common venting system must be

modified to correct the problem.

Resize the common venting system to the minimum

vent pipe size determined by using the appropriate

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.)

Thermostat

The room thermostat should be located on an inside wall

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.

Page 7

Page 8

Figure 5. Wiring Diagram − Single Phase

Condensate Drain

The 13HPP unit is equipped with a 3/4 inch FPT coupling

for condensate line connection. Plumbing must conform to

local codes. Use a sealing compound on male pipe

threads.

UNIT

MINIMUM PITCH

1 IN. (25 MM) PER 10’

(3 M) OF LINE

MOUNTING

FRAME

OPEN

VENT

TRAP MUST BE DEEP ENOUGH TO OFFSET

MAXIMUM STATIC DIFFERENCE (GENERALLY, 3

INCHES MINIMUM).

TYPICAL CONDENSATE DRAIN

Figure 6. Typical Condensate Drain

The drain line must be properly trapped and routed to a

suitable drain. See figure 6 for proper drain arrangement.

The drain line must pitch to an open drain or pump a

minimum of 1 inch (25.4mm) per 10 feet (3048mm) to

prevent clogging of the line. Seal around drain connection

with suitable material to prevent air leakage into return air

system.

NOTE  Drain line connection may not carry the weight of

the unsupported drain line. Support the drain line, if

necessary.

NOTE  Condensate must never drain on a rubberized

roof.

Drain piping should not be smaller than drain connection at

coil. An open vent in drain line will some times be required

due to line length, friction and static pressure. Drains

should be constructed in a manner to facilitate future

cleaning.

NOTE  The condensate drain line MUST be trapped to

provide proper drainage.

CAUTION

Condensate line connection must be hand−tightened. Do

not use tools.

Air Filter

An air filter is not factory−supplied with the unit. A

field−provided air filter must always be in place during unit

operation. Air filter sizes are shown in table 2.

This unit is equipped with an internal air filter clip which is

located in the indoor coil compartment attached to the side

of the unit drain pan.

Table 2. Unit Air Filter Sizes  inches (mm)

Unit Model Filter Size Filter

Quantity

−24, −30, −36 28 in. (711) X 24 in. (610) x 1 in. (26) 1

−42, −48, −60 30 in. (762) X 30 in (762). x 1 in. (26) 1

Supply and Return Duct Connections

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.

They should NOT be sized by simply matching the

dimensions of the duct connections on the unit.

Ducting installed outdoors MUST be insulated and

waterproofed.

CAUTION

When fastening duct system to side duct flanges on unit,

insert screws through duct flanges only. Do not insert

screws through casing. Outdoor duct must be insulated

and waterproofed.

Compressors

Units are shipped with the compressor mountings

factory−adjusted and ready for operation.

Unit compressors have internal protection. If there is an

abnormal rise in the compressor temperature, the

protector will open and the compressor will stop.

CAUTION

Do not loosen compressor mounting bolts.

Page 9

Blower Speed Settings and Performance

Data

Electric shock hazard. Can cause injury or

death. Before attempting to perform any

service or maintenance, turn the electrical

power to unit OFF at disconnect switch(es). Unit

may have multiple power supplies.

WARNING

Factory settings for the blower speed jumpers are given in

the wiring diagram in figure 5. Use the following tables to

determine the correct air volume for operation in heat and

cool mode.

Table 3. Motor Speed Tap Settings

Tap Purpose

Tap 1 Fan Only

Tap 2 Low Static Cooling

Tap 3 High Static Cooling

Tap 4 and 5 Used for electric heat. Refer to heater label for

proper selection.

Table 4. 13HPP24A Blower Performance (Horizontal Airflow1)

External Static

Pressure in. w.g.

Air Volume at Specific Blower Taps (cfm)

Tap 1

(Fan Only)

Tap 2

(Low Static Cooling)

Tap 3

(High Static Cooling)

2 Tap 4

(Electric Heat)

2 Tap 5

(Electric Heat)

0.20 640 830 950 900 1060

0.30 460 800 910 870 1030

0.40 370 760 880 830 980

0.50 − − − 710 840 800 960

0.60 − − − 640 800 730 930

0.70 − − − 600 750 690 910

0.80 − − − 570 700 640 860

NOTE  All air data measured external to unit with dry coil and less filter.

1 For downflow air volume, add 0.10 in. w.g. to duct static.

2 Taps 4 and 5 are used with Optional Electric Heat. Refer to Electric Heat nameplate for proper heat tap selection

Table 5. 13HPP30A Blower Performance (Horizontal Airflow1)

External Static

Pressure in. w.g.

Air Volume at Specific Blower Taps (cfm)

Tap 1

(Fan Only)

Tap 2

(Low Static Cooling)

Tap 3

(High Static Cooling)

2 Tap 4

(Electric Heat)

2 Tap 5

(Electric Heat)

0.20 650 1030 1150 1110 1150

0.30 550 1000 1110 1070 1110

0.40 490 970 1080 1040 1080

0.50 430 930 1050 1000 1050

0.60 − − − 900 1010 970 1010

0.70 − − − 860 980 950 980

0.80 − − − 820 960 920 960

NOTE  All air data measured external to unit with dry coil and less filter.

1 For downflow air volume, add 0.10 in. w.g. to duct static.

2 Taps 4 and 5 are used with Optional Electric Heat. Refer to Electric Heat nameplate for proper heat tap selection

Table 6. 13HPP36A Blower Performance (Horizontal Airflow1)

External Static

Pressure in. w.g.

Air Volume at Specific Blower Taps (cfm)

Tap 1

(Fan Only)

Tap 2

(Low Static Cooling)

Tap 3

(High Static Cooling)

2 Tap 4

(Electric Heat)

2 Tap 5

(Electric Heat)

0.20 650 1240 1320 1240 1320

0.30 590 1200 1260 1200 1260

0.40 500 1150 1230 1150 1230

0.50 430 1100 1200 1100 1200

0.60 − − − 1060 1160 1060 1160

0.70 − − − 1020 1120 1020 1120

Page 10

0.80 − − − 980 1080 980 1080

NOTE  All air data measured external to unit with dry coil and less filter.

1 For downflow air volume, add 0.10 in. w.g. to duct static.

2 Taps 4 and 5 are used with Optional Electric Heat. Refer to Electric Heat nameplate for proper heat tap selection

Page 11

Table 7. 13HPP42A Blower Performance (Horizontal Airflow1)

External Static

Pressure in. w.g.

Air Volume at Specific Blower Taps (cfm)

Tap 1

(Fan Only)

Tap 2

(Low Static Cooling)

Tap 3

(High Static Cooling)

2 Tap 4

(Electric Heat)

2 Tap 5

(Electric Heat)

0.20 780 1450 1650 1510 1650

0.30 690 1370 1570 1430 1570

0.40 610 1280 1510 1380 1510

0.50 540 1200 1440 1290 1440

0.60 − − − 1120 1360 1220 1360

0.70 − − − 1060 1260 1150 1260

0.80 − − − 990 1160 1090 1160

NOTE  All air data measured external to unit with dry coil and less filter.

1 For downflow air volume, add 0.10 in. w.g. to duct static.

2 Taps 4 and 5 are used with Optional Electric Heat. Refer to Electric Heat nameplate for proper heat tap selection

Table 8. 13HPP48A Blower Performance (Horizontal Airflow1)

External Static

Pressure in. w.g.

Air Volume at Specific Blower Taps (cfm)

Tap 1

(Fan Only)

Tap 2

(Low Static Cooling)

Tap 3

(High Static Cooling)

2 Tap 4

(Electric Heat)

2 Tap 5

(Electric Heat)

0.20 860 1650 1800 1650 1800

0.30 760 1600 1750 1600 1750

0.40 690 1550 1690 1550 1690

0.50 640 1500 1630 1500 1630

0.60 − − − 1440 1570 1440 1570

0.70 − − − 1370 1470 1370 1470

0.80 − − − 1290 1330 1290 1330

NOTE  All air data measured external to unit with dry coil and less filter.

1 For downflow air volume, add 0.10 in. w.g. to duct static.

2 Taps 4 and 5 are used with Optional Electric Heat. Refer to Electric Heat nameplate for proper heat tap selection

Table 9. 13HPP60A Blower Performance (Horizontal Airflow1)

External Static

Pressure in. w.g.

Air Volume at Specific Blower Taps (cfm)

Tap 1

(Fan Only)

Tap 2

(Low Static Cooling)

Tap 3

(High Static Cooling)

2 Tap 4

(Electric Heat)

2 Tap 5

(Electric Heat)

0.20 1000 1820 1950 1820 1950

0.30 900 1790 1910 1790 1910

0.40 800 1730 1860 1730 1860

0.50 750 1670 1800 1670 1800

0.60 − − − 1630 1700 1630 1700

0.70 − − − 1530 1560 1530 1560

0.80 − − − 1380 1360 1380 1360

NOTE  All air data measured external to unit with dry coil and less filter.

1 For downflow air volume, add 0.10 in. w.g. to duct static.

2 Taps 4 and 5 are used with Optional Electric Heat. Refer to Electric Heat nameplate for proper heat tap selection

Page 12

Start−Up

The cooling section is a complete factory package utilizing

an air−cooled condenser. The system is factory−charged

with HFC−410A refrigerant.

PRE−START CHECKLIST:

1. Make sure refrigerant lines do not rub against the

cabinet or each other.

2. Inspect all electrical wiring, both factory− and

field−installed, for loose connections.

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.

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.

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

COOLING SEQUENCE OF OPERATION

When the thermostat is in the cooling mode, the O circuit is

powered which energizes the reversing valve. Upon

cooling demand, the thermostat closes circuit R and Y to

close the unit contactor and start the compressor and

outdoor fan. The thermostat automatically closes R to G

circuit at the same time. This brings on the indoor blower at

the selected cooling fan speed. Upon satisfying cooling

demand, the thermostat will open the above circuits and

open the main contactor, stopping the compressor and

outdoor fan. If the unit is equipped with a delay timer, the

indoor blower will continue to operate for 90 seconds which

improves system efficiency.

HEATING SEQUENCE OF OPERATION

Upon heating demand, the thermostat closes circuit R to Y,

which closes the unit contactor, starting the compressor

and outdoor fan. The reversing valve is not energized in the

heating mode. The thermostat again automatically brings

on the indoor fan at the selected heating speed at the same

time. Upon satisfying heating demand, the thermostat

opens above circuits and stops unit operation.

System Operation

UNIT COMPONENTS

The outdoor unit and indoor blower cycle on demand from

the room thermostat. If the thermostat blower switch is in

the ON position, the indoor blower operates continuously in

the selected continuous blower speed.

Bi−Flow Liquid line Filter Drier

The unit is equipped with a large−capacity bi−flow filter drier

which keeps the system clean and dry. If replacement is

necessary, order another of the same design and capacity.

The replacement filter drier must be suitable for use with

HFC−410A refrigerant.

Low Pressure Switch

The 13HPP is equipped with an auto−reset low pressure

switch which is located on the vapor line. The switch shuts

off the compressor when the vapor pressure falls below the

factory setting. This switch, which is ignored during defrost

operation, closes at pressures at or above 30 + 5 psig (207

+ 34 kPa) and opens at 10 + 3 psig (69 + 21 kPa). It is not

adjustable.

High Pressure Switch

The 13HPP is equipped with an auto-reset high pressure

switch (single−pole, single−throw) which is located on the

liquid line. The switch shuts off the compressor when

discharge pressure rises above the factory setting. The

switch is normally closed and is permanently adjusted to

trip (open) at 590 + 15 psig (4068 + 103 kPa).

Defrost Thermostat

The defrost thermostat is located on the liquid line between

the check/expansion valve and the distributor. When

defrost thermostat senses 42°F (5.5°C) or cooler, the

thermostat contacts close and send a signal to the defrost

control to start the defrost timing. It also terminates defrost

when the liquid line warms up to 70°F (21°C).

Page 13

Defrost System

The defrost system includes a defrost thermostat (S6) and

a defrost control (CMC1).

DEFROST CONTROL

This defrost control includes the combined functions of a

time/temperature defrost control, defrost relay, time delay,

diagnostic LEDs, and a terminal strip for field wiring

connections.

24V TERMINAL

STRIP

CONNECTIONS

DIAGNOSTIC

LEDS

HIGH PRESSURE

SWITCH

TEST

PINS

DEFROST TIMING

PINS (P1)

REVERSING

VALVE

DEFROST

THERMOSTAT (S6)

LOW PRESSURE

SWITCH

COMPRESSOR

DELAY PINS

S87

SERVICE LIGHT

CONNECTIONS

Figure 7. Defrost Control (CMC1)

The defrost control provides automatic switching from

normal heating operation to defrost mode and back. When

the defrost thermostat is closed, the control accumulates

compressor run time at 30, 60 or 90 minute field adjustable

intervals. When the selected compressor run time interval

is reached, the defrost relay is energized and defrost

begins.

Defrost Control Timing Pins (P1)

Each timing pin selection provides a different

accumulated compressor run time period for one defrost

cycle. This time period must occur before a defrost cycle

is initiated. The defrost interval can be adjusted to 30

(T1), 60 (T2), or 90 (T3) minutes (see figure 24). The

maximum defrost period is 14 minutes and cannot be

adjusted.

NOTE  Defrost control part number is listed near the P1

timing pins.

SUnits with defrost control 100269−02: Factory default

is 60 minutes

SUnits with defrost control 100269−04: Factory default

is 90 minutes

If the timing selector jumper is missing, the defrost control

defaults to a 90−minute defrost interval.

Compressor Delay (P5)

The defrost control has a field−selectable function to

reduce occasional sounds that may occur while the unit is

cycling in and out of the defrost mode.

SUnits with defrost control 100269−02: The compressor

will be cycled off for 30 seconds going in and out of the

defrost mode when the compressor delay jumper is

removed.

SUnits with defrost control 100269−04: The compressor

will be cycled off for 30 seconds going in and out of the

defrost mode when the compressor delay jumper is

installed.

NOTE  The 30−second compressor feature is ignored

when the jumper is installed on TEST pins.

Time Delay

The timed−off delay is five minutes long. The delay helps

protect the compressor from short−cycling in case the

power to the unit is interrupted or a pressure switch opens.

The delay is bypassed by placing the timer select jumper

across the TEST pins for 0.5 seconds.

NOTE  The defrost control must have a thermostat

demand for the bypass function.

Test Mode (P1−TEST)

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 two 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 re−applied.

Diagnostic LEDs (DS1 and DS2)

The defrost control uses two LEDs for diagnostics. The

LEDs flash a specific sequence according to the diagnosis

(table 10).

Table 10. Defrost Control Diagnostic LEDs

DS2 Green DS1 Red Condition

OFF OFF Power problem

Simultaneous Slow Flash Normal operation

Alternating Slow Flash 5−minute anti−short cycle delay

OFF Slow Flash Low Pressure Fault

OFF ON Low Pressure Lockout

Slow Flash OFF High Pressure Fault

ON OFF High Pressure Lockout

Page 14

System Performance

This equipment is a self contained, factory optimized using

check expansion valve metered refrigerant system, and

should require no adjustments when properly installed. If

however unit

Ensure unit is installed per manufacturer´s instructions and

that line voltage and air flows are correct. Refer to table 10

for proper superheat values. Check superheat settings by

measuring pressure at the suction line service port.

Measure pressure at the liquid service port. Take line

temperature within 2 inches of service port connection to its

main tube. If unit superheat subcooling varies by more than

table allowance, check internal seals, service panels and

duct work for air leaks, as well as restrictions and blower

speed settings. If unit performance remains questionable,

remove charge, evacuate to 500 microns, and weigh in

refrigerant to name plate charge. It is critical that the exact

charge is re−installed. Failure to comply will compromise

system performance. If unit performance is still

questionable, check for refrigerant related problems such

as, blocked coil or circuits, malfunctioning metering

devices or other system components.

Table 11. Suction Superheat Values

Unit Model No.

Suction Superheat +/− 3 DEG @

82_F OD / 80_F IDDB

/ 67_F IDWB

13HPP24 17_F

13HPP30 20_F

13HPP36 16_F

13HPP42 17_F

13HPP48 19_F

13HPP60 19_F

Verify system performance using table 12 as a general

guide. Table 12 should not be used for charging unit. 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.

Used carefully, this table 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.

Table 12. Normal Operating Pressures (Cooling)

80F db / 67F wb RETURN AIR Air Temperature Entering Outdoor Coil (F)

UNIT PRESSURE 65 70 75 80 82 85 90 95 100 105 110 115

13HPP24

Vapor

133 136 138 141 142 143 146 148 150 152 154 156

13HPP30 133 136 139 142 143 144 146 150 151 152 154 156

13HPP36 134 138 142 145 147 148 151 154 156 157 158 158

13HPP42 128 133 137 142 144 145 147 149 151 152 154 155

13HPP48 126 130 133 137 138 139 142 145 147 148 149 150

13HPP60 127 130 133 136 137 138 140 143 144 145 147 149

13HPP24

Liquid

253 274 294 315 323 337 361 383 408 428 461 489

13HPP30 236 256 276 296 304 318 341 363 387 406 437 463

13HPP36 246 267 287 308 316 330 355 377 402 422 455 483

13HPP42 246 268 290 311 320 334 356 378 401 420 451 476

13HPP48 248 269 290 312 320 334 357 380 404 423 452 477

13HPP60 256 277 298 319 327 341 365 386 412 432 461 486

Table 13. Normal Operating Pressures (Heating)

70F RETURN AIR Air Temperature Entering Outdoor Coil (F)

UNIT PRESSURE 0 5 10 17 20 25 30 35 40 47 50 55 60

13HPP24

Vapor

38 45 52 61 65 72 78 85 92 101 105 112 118

13HPP30 36 43 51 61 66 73 81 88 96 106 111 118 126

13HPP36 38 46 54 65 70 78 85 93 101 112 117 125 132

13HPP42 38 45 53 63 67 75 82 89 97 107 111 119 126

13HPP48 37 44 51 61 65 72 79 86 93 103 107 114 121

13HPP60 35 42 48 58 62 69 76 83 89 99 103 110 117

13HPP24

Liquid

242 252 263 278 284 295 306 316 327 342 348 359 370

13HPP30 272 279 287 297 302 309 317 324 332 342 347 354 362

13HPP36 301 308 316 316 331 338 346 353 361 371 376 383 391

13HPP42 275 283 291 303 308 316 325 333 341 353 358 366 375

13HPP48 265 273 282 293 298 306 314 322 331 342 347 355 363

13HPP60 275 285 294 308 314 323 333 343 352 366 372 381 391

Page 15

Maintenance

At the start of each cooling season, this equipment should

be serviced by a licensed professional technician (or

equivalent). Periodic inspection and maintenance normally

consists of changing or cleaning filters.

CONDENSER FAN CLEARANCES

The hub of the condenser fan blade should be flush with the

end of the motor shaft to ensure proper clearances and

performance. This dimension should be checked and the

fan should be adjusted accordingly any time servicing of

the outdoor fan system is required.

AIR FILTER

Visually inspect vent outlet periodically to make sure that the

there is no buildup of soot and dirt. If necessary, clean to

maintain adequate opening to discharge flue products.

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.

Planned Service and (under some conditions)

cleaning the main burners

You should expect a service technician to check the

following items during an annual inspection. Power to the

unit must be shut off for the service technician’s safety.

SFresh air grilles and louvers Must be open and

unobstructed to provide air.

SUnit appearance must be inspected for:

ARust, dirt or signs of water

BBurnt or damage wires

CBurnt or damage components.

SA good coat of auto wax can enhance the appearance

of the cabinet.

SBlower access door must be properly in place.

SReturn air duct must be properly attached and must

provide an air seal to the unit.

SOperating performance  Unit must be observed

during operation to monitor proper performance of the

unit and the vent system.

Problems detected during the inspection may make it

necessary to temporarily shut down the unit until the items

can be repaired or replaced.

Pay attention to your unit. Situations can arise between

annual unit inspections that may result in unsafe operation.

Lennox 13HPP Installation guide

Brand: Lennox

Model: 13HPP

Category: Split-system air conditioners

Type: Installation guide

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Lennox 13HPP Installation guide

Lennox 13HPP Installation guide

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