LENNOX Package Units(both Units Combined) Manual L0806704

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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Page Count: 8

See unit nameplate for manufacturer

and address.

504,875M

1/2006

Supersedes 1/2004

LGA/LGC036, 042, 048, 060, 072

(3, 3-1/2, 4, 5, and 6 TONS)

LGA/LGC090, 102, 120, 150,

(7-1/2, 8-1/2, 10, and 12-1/2 TONS)

LGA/LGC156, 180, 210, 240, 300S

(13, 15, 17-1/2, 20, and 25 TONS)

LGA/LGC248, 30OH, 360

(20, 25, and 30 TONS)

ROOFTOP

UNITS

FBR113270

LGA240 SHOWN

READ ALL INSTRUCTIONS IN THIS MANUAL

AND RETAIN FOR FUTURE REFERENCE

_pu Technical

blications

Litho U.S.A.

@2006

A\tL't F-,R_*_A

C US

/-18TEO

jA WARNING

Do not store or use gasoline or other

flammable vapors and liquids in the

vicinity of this or any other appliance.

Installation and service must be per-

formed by a qualified installer, ser-

vice agency or the gas supplier.

01/06

IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII

WHAT TO DO IF YOU SMELL GAS:

• Do not try to light any appliance.

•Extinguish any open flames.

•Do not touch any electrical switch; do not

use any phone in your building.

•Leave the building immediately.

•Immediately call your gas supplier from a

neighbor's phone. Follow the gas suppli-

er's instructions.

•If you cannot reach your gas supplier, call

the fire department. 504,875M

IIIHIIIII11111IIIIIIIIII11111111111111111IIIIII

HEAT EXCHANGER

CONDENSER FAN

EVAPORATOR COIL

FILTERS

ECONOMIZER

(OPTIONAL)

COMPRESSOR

COMBUSTION

AIRINDUCER

DRAIN GAS VALVE

DISCONNECT BURNERS

(OPTIONAL) BLOWER

120V TB1

(OPTIONAL)

ECONOMIZER DAMPERS

(OPTIONAL) CONDENSER

COIL

DISCONNECT

(Factory-installed

option)

(Factory-installed option)

DRAIN

COMPRESSORS HEAT EXCHANGER GAS VALVE

TUBES

COMBUSTION AIR

INDUCER

BURNERS

Page 1

BLOWERS

BLOWER MOTOR,

CONTROL

CONDENSATE

DRAIN

120V GFCI OUTLET

(Factory-installed option)

DISCONNECT

(Factory=installed

option)

HEAT EXCHANGER TUBES

CONDENSER

COILS

COMPRESSORS

(3COMPRESSORS ON

LG_LGC156&180UNITS)

BURNERS

COMBUSTION AIR

INDUCER

ECONOMIZER DAMPERS

(OPTIONAL)

EVAPORATOR

FILTERS COIL

CONDENSER FANS

BLOWER

MOTOR

CONDENSATE

DRAIN

HEAT EXCHANGER

TUBES

GAS VALVE COMBUSTION AIR

INDUCER

BURNERS

COMPRESSORS

(-248 AND -300H HAVE

4COMPRESSORS)

CONDENSER

COILS

Page 2

1- Keep unit area clear and free of combustible

materials,gasolineandotherflammablevaporsand

liquids,

2 - Donotobstructairflowto unit,Unitmustreceive

an unobstructed flow of combustion and

ventilatingair,

`&WARNING

`&WARNING

`&WARNING

AWARNING

,&CAUTION

,&WARNING

,&WARNING

,&WARNING

FOR YOUR SAFETY READ BEFORE LIGHTING

BEFORE LIGHTING smell all around the furnace area for

gas. Be sure to smell next to the roof because some gas is

heavier than air and will settle on the roof,

Use only your hand to push in or turn the gas control knob,

Never use tools, If the knob will not push in or turn by

hand, do not try to repair it, call a qualified service

technician. Force or attempted repair may result in a fire

or explosion,

The unit is equipped with an automatic spark ignition

system, There is no pilot, In case of a safety shutdown,

move thermostat switch to OFF and return the thermostat

switch to HEAT, Electromechanical thermostat is shown

in figure 1. For logic units and units with electronic

temperature controls, shut off the main disconnect and

then turn it on to reset the ignition control,

Page 3

TYPICAL ELECTROMECHANICAL THERMOSTAT

-//I //I

50 60 70 80 g0

10 15 20 25 80

\\\\'\/\/"IIII"11II"////

i !!I

ON HEAT OFF COOL

FIGURE 1

Placing Unit Into Operation

,&WARNING

Gas Valve Operation for White Rodgers 36C (figure 4),

White Rodgers 36E (figure 2), Honeywell VR8205M

(figure 3), and Honeywell VR8205QNR8305Q (figure 5)

1- Set thermostat to lowest setting,

2- Turn off all electrical power to furnace,

3- This furnace is equipped with an ignition device which

automatically lights the burner, Do not try to light the

burner by hand,

4- Open or remove the heat section access panel,

5- 36C, VR8205, & VR8305-

Turn the knob on the gas valve clockwise _1_ to

"OFF", Depress 36C knob slightly, Do not force,

36E -

Turn the knob 180° either way to "OFF",

WHITE RODGERS 36E GAS VALVE

INLET

PRESSURE

TAP (SIDE)

8

\

Gas valve knob is shown

in OFF position.

-1

MANIFOLD

PRESSURE

TAP (SIDE)

FIGURE 2

I HONEYWELL VR8205M SERIES GAS VALVE

I INLET _ :::::::::::_T"_ MANIFOLD

,, _PRESTASURE

FIGURE 3

WHITE RODGERS 36C76 GAS VALVE

STAGE 2 MANUAL MANIFOLD MANIFOLD

INLET PRESSURE ADJUSTMENT PRESSURE

PRESSURE SCREW UNDER CAP TAP ;SIDE)

FIGURE 4-- --

HONEYWELL VR8205_ SE_S G"ASVALVE 1

HIGH FIRE LOW FIRE /

ADJ__ ADJ_;÷__ MAN,FOLD/

r,,PRESSURE/

/

Gas valve knob is shown in OFF position. /

FIGURE 5

6- Wait five (5) minutes to clear out any gas, If you then

smell gas, STOP! Immediately call your

gas supplier from a neighbor's phone, Follow the gas

supplier's instructions, If you do not smell gas, go to

the next step.

7- 36C, VR8205, & 8305 -

Turn the knob on the gas valve counterclockwise 41_

to "ON", Do not force,

36E -

Turn the knob 180 ° either way to "ON",

8- Close or replace the heat section access panel.

9- Turn on all electrical power to furnace,

10- Set thermostat to desired setting,

Page 4

11- Thecombustionair inducerwillstart,Theburners

willlightwithin40seconds,

12- Ifthefurnacedoesnotlightthefirsttime(gaslinenot

fullypurged),it willattemptuptotwomoreignitions

beforelockingout,

13- Iflockoutoccurs,repeatsteps1through10,

14- Ifthefurnacewillnotoperate,followtheinstructions

"TurningOffGasto Furnace"andcallyourservice

technicianorgassupplier.

TurningOffGasto Furnace

1- Ifusinganelectromechanicalthermostat,settothe

lowestsetting.

2- Beforeperforminganyservice,turnoffallelectrical

powerto thefurnace.

3- Openorremovetheheatsectionaccesspanel.

4- 36C, VR8205, & VR8305-

Turn the knob on the gas valve clockwise _ to

"OFF". Depress 36C knob slightly. Do not force.

36E -

Turn the knob 180° either way to "OFF".

5- Close or replace the heat section access panel.

A,WARNING

To maintain efficiency and longevity, your equipment

must be serviced yearly by a qualified service technician.

Failure to provide proof of service can void warranty.

A, CAUTION

HEAT EXCHANGER ASSEMBLY (036-072)

HEAT

EXCHANGER T

COMBUSTION

AIR

INDUCER

\

BAFFLE

FLUE BOX

GAS

VALVE VENT

CONNECTOR

FIGURE 6

HEAT EXCHANGER ASSEMBLY (090-360)

&WARNING

The primary air is permanently set for normal operation.

The flame will be basically blue with some clear yellow

streaking in the end dthe flame, Inspect the burner flame

periodically during the heating season using the

inspection port provided on the burner access panel.

Annually, before heating season, inspect the combustion

air louvers, vent cap, heat exchanger, burners and

combustion air inducer for corrosion, deterioration or

deposits of debris. Remove any obstructions or blockage.

See figures 6 and 7.

HEAT

EXCHANGER

TUBE

COMBUSTION

AIR

VENT

GAS VALVE

BURNER

FIGURE 7

Page 5

ServicingFilter

Unitsareequippedwiththe numberof filtersshownin

table1,Filtersshouldbecheckedmonthlyandreplaced

whennecessarywithfiltersoflikekindandsize.Takenote

of air flow directionmarkingon filter frame when

reinstallingfilters,Seefigure8,

REMOVE FILTERS

PULL TO REMOVE

FILTERS

FIGURE 8

NOTE -Filters must be ULC approved or equivalent for

use in Canada.

TABLE 1

NUMBER AND SIZE OF FILTER BY UNIT

LGA/LGC Unit

036, 042, 048,060,072

090,102,120,150

156,180,210,240,300S

248,300H, 360

Qty Filter Size - inches (mm)

2 16 X 25 X 2 (406 X 635 X 51)

4 18 X 24 X 2 (457 X 610 X 51)

6 24 X 24 X 2 (610 X 610 X 51)

12 20X20X2(508X508X51)

Lubrication

All motors are lubricated at the factory, No further

lubrication is required,

Blower shaft bearings are prelubricated, For extended

bearing life, relubricate at least once every two years

with a lithium base grease, such as AIvania 3 (Shell Oil),

Chevron BRB2 (Standard Oil) or Regal AFB2 (Texas

Oil). Use a hand grease gun for relubrication, Add only

enough grease to purge through the bearings so that a

bead of grease appears at the seal lip contacts.

Manifold Pressures

Manifold pressures are shown in table 2. Refer to figures

2, 3, 4 and 5 to locate pressure ports.

TABLE 2

MANIFOLD PRESSURES in.wg. (kPa)

Natural Gas Propane (LP) Gas

LGA/LGC Unit 1st Stg.+ 2nd Stg.+ 1st Stg.+ 2nd Stg.+

0.2(+.05) 0.3 (+.08) 0.2 (+.05) 0.3 (+.08)

036, 042, 048, 060, NA 3.5 NA 10.5

072 Std./High Heat (0.87) (2.61 )

036, 042, 048, 060, 1.9 3.5 5.3 10.5

072 Dual Heat (0.47) (0.87) (1.32) (2.61)

1.6 3.7 5.5 10.5

090 through 360 (0.40) (0.92) (1.37) (2.61)

Burners

Clean the burners as follows:

_

2-

3_

Turn off the electrical power and the gas supply to the

unit.

Open or remove the burner compartment access

panel,

Remove two screws securing burners to burner

support and lift the burners from the orifices. See

figure 9. Clean as necessary, Spark gap on ignition

electrode must be properly set, Refer to the Heating

Adjustment section in the installation instructions.

GAS

VALVE

BURNER BOX ASSEMBLY

!

GAS MANIFOLD

FLAME

SENSOR

FIGURE 9

Page 6

4-Replace burnersand screwssecuringburner,

Replacetheburnercompartmentaccesspanel,

5- Turnon the electrical power and the gas supply to the

unit, Follow the operating instructions attached to the

unit and use the inspection port in the access panel

to check the flame,

Combustion Air Inducer

A combustion air inducer proving switch checks

combustion air inducer operation before allowing power

to the gas controller. The gas controller will not operate if

the inducer is obstructed,

Under normal operating conditions, the combustion air

inducer wheel should be checked and cleaned prior to the

heating season. However, it should be examined

periodically during the heating season to establish an

ideal cleaning schedule,

Clean the combustion air inducer as follows:

1- Turn off the electrical power and the gas supply to the

unit,

2- Disconnect the pressure switch air tubing from the

combustion air inducer port,

3- Remove and retain the screws securing the

combustion air inducer to the flue box, Remove and

retain two screws from the bracket supporting the

vent connector. See figures 6 and 7,

4- Clean the inducer wheel blades with a small brush

and wipe off any dust from the housing, Clean

accumulated dust from the front of the flue box cover.

5- Return the combustion air inducer motor and the vent

connector to their original location and secure with

retained screws. It is recommended that the

combustion air inducer gasket be replaced during

reassembly.

6- Use a small brush to clean the combustion air inlet

louvers on the heat access panel,

Flue Passageway and Flue Box

1- Remove the combustion air inducer assembly as

described in the Combustion Air Inducer subsection,

2- Remove the flue box cover. Clean the flue box with a

wire brush as required,

3- Clean the tubes with a wire brush,

4- Reassemble the unit. The flue box cover gasket and

combustion air inducer gasket should also be

replaced during reassembly,

Call a qualified service technician if the unit is inoperative.

Before calling, always check the following to be sure

service is required:

1- Be sure electrical disconnect switches are ON,

2- Check room thermostat for proper setting,

3- Replace any blown fuses or reset circuit breakers,

4- Gas valve should be ON,

5- Air filters should not be plugged, limiting air flow,

6- Make sure all access panels are in place,

When ordering repair parts, include the complete model number and serial number listed on the ETL/C,G,A,/CSA rating

plate - e.g. LGA240H2BH 1Y.

Gas Heat Section Parts

Heat Exchanger

Combustion Air Assembly

Combustion Air Proving Switch

Burner Assembly

Burner Manifold Assembly

Main Burner Orifices

Flame Roll-out Switches

Auxiliary Limit Controls

Ignition Electrode Assembly

Ignition Lead

Ignition Sensor Assembly

Sensor Lead

Combination Gas Valve

Limit Controls

Cooling Parts

Compressors

Low Pressure Switch

High Pressure Switch

Condenser Fan Motors

Condenser Fan Blades

Condenser Fan Run Capacitors

Freezestats

Low Ambient Pressure Switch

Low Ambient Thermostat

Condenser Fan Mounting Bracket

Fan Grille

Indoor Blower Motors

Blower Wheel

Expansion Valve

Distributor

Crankcase Heaters

Exhaust Fans (Opt.)

Electrical Control Parts

Main Control Panel

Economizer Control Panel (Opt,)

Compressor 2 Control Panel

Compressor 3 and 4 Control Panel

Gas 2 Control Panel

Compressor Contactors

Circuit Breakers (Opt.)

Transformer (Control)

Transformer (Contactor)

Transformer (CAB)

Blower Contactor

Limit, Blower Relay

Heat Relays

Condenser Fan Relays

Capacitor CAB

Relay CAB

Low Ambient Relay

Low Amb. Low Pressure Switches

Disconnect Switch (Opt,)

Blower Motor Overload Relay

Page 7