LENNOX Furnace/Heater, Gas Manual L0806829

User Manual: LENNOX LENNOX Furnace/Heater, Gas Manual LENNOX Furnace/Heater, Gas Owner's Manual, LENNOX Furnace/Heater, Gas installation guides

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Technlc_J

® GAS KITS AND ACCESSORIES

Dallas, Texas

LJtho U.S., _

502,887M

7/93

Supersedes 502,583M GAS TWINNING KIT

INSTALLATION INSTRUCTIONS FOR TWINNING KIT, NON--CONTINUOUS FAN,

LB--63093B (64H88) USED WITH GAS FIRED FURNACES

Package 1 of I contains:

1- - Twinning control box with cover

2- -Auxiliary limit controls on mounting bracket

4-- #8 -- 18 screws

5-- Grommets

4- - 1/4" piggy back terminal connectors

5- - Dual male terminal connectors

Twinning kit and gas fired furnaces must be installed and

wired in accordance with local codes. Authorities having

jurisdiction should be consulted before installation. Refer

to NEC standard in the US or CEC standard in Canada

on all wire insulations and sizes.

Twinning kit (LB--63093B) is used for either single or

two--stage burner operation with simultaneous blower

operation. The two units must be of the same application:

upflow, downflow or horizontal. Furnaces must also be of

the same blower size. The heating speed taps on each

unit must be set the same. The cooling speed tap of one

unit must also be that same as the other unit. The control

system is designed for single or two- -stage heating and

single or two- -stage cooling.

NOTE--Air stratification problems may result from using

two stage heating with twinning kit.

This gas twin kit does not include the feature for

continuous low speed fan. A separate gas twinning kit

with that feature is available as part no. 35J93.

Installation of the gas twinning kit is in three parts. The

auxiliary limits are installed in each furnace. Next, the gas

twin control box is installed. Finally, the wiring is done to

complete the project.

A--Installing Auxiliary Limit Controls ($92)

Auxiliary limit controls (identified as $92 on wiring

diagram key charts) must be installed to provide

protection from overheating in case of blower failure.

Install auxiliary limits as described in the following

sections according to the application.

For Upflow Units: (Figure 1)

1- - Loosen blower housing screw.

2-- Slide bracket with auxiliary limit between blower

housing and blower deck.

3-- Tighten screw to secure auxiliary limit in place.

4-- Wire limits in series with Class II 24V voltage circuit

according to wiring diagrams infigures 7 and 9.

NOTE--Wires used to connect auxiliary limit control

should have insulated terminals.

AUXILIARY LIMIT LOCATION

FOR UPFLOW FURNACES

BLOWE R_F"_'_t2,. _

BLOWER

HOUSING _AUXlLIARY

LIMIT

(on bracket)

FIGURE 1

For Downflow and Horizontal Units: (Figure 2)

1- - Using limit bracket as a guide, place bracket on the

side of the blower housing and drill mounting hole.

Hole should be 1"to 1- -1/2" from the edge of blower

housing. Position limit so that limit face is mounted

toward return air opening.

2- -Secure limit bracket with sheet screw to the side of

the blower housing.

3--Wire limits in series with low voltage circuit

according to wiring diagrams in figures 5, 7 and 9.

NOTE--Wires used to connect auxiliary limit control

should have insulated terminals.

Page1

AUXILIARY LIMIT LOCATION FOR

DOWNFLOW AND HORIZONTAL FURNACES

BLOWER

HOUSING

_SCREW

BLOWER I

AUXILIARY

LIMIT

(on bracket)

BLOWER

IDECK

FIGURE 2

B--Installing Gas Twin Kit Control Box

Twinning kit control box should be installed, with screws

provided, on furnace side panel or any convenient

location, See figure 3,

TWIN KIT CONTROL BOX LOCATION

MOUNT II

CONTROL BOX I I

IN A CONVENIENT 2 AMP

LOCATION REPLACEABLE

FUSE

COVER

(INSTALLED)

FIGURE 3

C--Furnace Installation Guidelines

Setting Units and Installing Ducts

Refer to unit installation instructions for setting of

individualfurnaces and follow the procedures outlined. If

acommon return duct is used, air entry should be

uniform to ensure eq ualair flowthrough the two furnaces.

Duct must be designed to prevent air stratification,

especially in two- -stage operation.

Venting

Refer to furnace installation instructions and AGNGAMA

venting booklet supplied with unit for guidelines.

G21/GSR21 and G26 units require separate intake and

exhaust pipes.

Gas Piping

Refer to furnace installation instructions for guidelines.

Make sure gas piping is properly sized to supply two

furnaces. Install piping so that there are no undue loads

on the furnace gas piping. Entire system must be

checked for leaks as directed in unit instructions.

Figure 4 shows internal wiring of twinning kit control box.

Typical wiring diagrams in figures 5 through 10 show the

two furnaces in standard speed.

1-- Disconnect and remove each unit transformer. Kit

transformer is the only transformer needed.

2-- All power to twinning kit control box is supplied

through furnace #2 door switch to terminal 8 in the

twin kit control box.

3- - All line voltage connections must be made at the line

voltage terminal strip or the line power blocks. Wire

power and neutral lines to each furnace. Each

furnace requires aseparate power supply.

4-- All Class II 24V voltage connections must be made

at the Class II 24V voltage terminal strip.

5-- The auxiliary limit controls must be connected in

series in the Class II 24V voltage circuit.

6-- System must be properly grounded and blowers

must have the same speed taps for cooling and the

same speed taps for heating. Tape all unused wires.

7- -Unitfan controlsand indoorblower relaycoils must be

wired in parallel in the Class II 24V voltage circuit.

8- -For cooling applications, the "Y" or "Y1" or "Y2" wire

must run to the compressor contactor and back to

the ground side of the low voltage circuit in the kit

control box.

9- - Use 14 gauge wire to wire kit to unit.

10- - Use replacement piggy back terminals (provided) if

existing terminal are damaged when removing

transformers and wiring units together.

11- -Insert provided plastic grommets in knockouts used

for wiring.

12--Affix provided wiring diagrams for each unit (unit1,

unit 2) on outside of furnace cabinet in a visible and

convenient location. Do not cover up existing unit

schematic diagrams.

For single stage heat operation, add heat anticipator

setting of each furnace together. If the value is higher that

the heat anticipation setting of the thermostat used, an

isolation relay must be used.

For two- -stage heat operation, refer to original unit wiring

diagram for heat anticipator setting for each thermostat.

Refer to individual furnace installation instructions for

start--up and adjustment procedures. Fan control

settings must be the same for both furnaces.

Both blower door interlock switches must be engaged to

supply power to the blowers and furnace control

systems. When there is a call for heat, heat relay within

the twinning kit control system is energized supplying

power to the furnace ignition control systems. Both

indoor blowers will come on when the fan- -on setting of

either furnace is reached.

When heat demand is satisfied, the heat relay is

de--energized, cutting power to the furnace ignition

control systems and closing the gas valves. Both indoor

blowers will continue to run until the fan- -off settings are

Page 2

equippedwith manual reset auxiliary limits (S21).

reached on both fan controls. Ifone of the blowers should

fail during a call for heat, a limit will break power to the

heat relays, thus closing the gas valves. The one working

blower will continue to run until the fan--off settings of

both fan controls of the two furnaces are reached. The

auxiliary limit resets automatically when sufficiently

cooled, so the furnaces will continue to cycle with the

auxiliary limit controls.An exception is on GSR21 units are

When the thermostat is in the fan- -on or cooling mode,

the parallel indoor blower relay coils are energized,

switching the blowers to high speed or the selected

cooling speed tap.

The control transformer is protected by a 2 amp fuse in

the twinning kit control box.

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no _ <

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FIGURE 4

Page 3

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120/60/12

DDDD

WIRE USED FOR TWO 5TABE

A HEAT ONLY.

APPLICATIONS

WIRE USED FOR SINGLE STAGE

A HEAT APPLICATION5 ONLY.

UNIT NO. I

5°2

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DESCRIPTION

(EY COMPONENT

q5 ]ONTROL BLOWER

t3 _OTOR 6LO#ER

J#3 JACK BLOWER MOTOR

(109 qELAY ACCESSORY

_45 uLU6 BLOWER MOTOR

_51 5WITCH DOOR INTERLOCK

_92 5WITCH L[N[_(SECONDARYJ

621 ERMINAL 5TRIP T_IN KIT

,LINE VOLTAGE FIELD INSTALLED

24 VOLT FIELD INSTALLED

_ -- _NEC/CEC CLASS 2

NOTE ALL REMAINING WIRES

FACTORY INSTALLED

UNIT NO 2

J¢5 P45

551

AI5

_i_ NN

22N

$92

KIO£ I r

ill

]

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2¢V POWER (R] 24V 24V POWER R

I UNiT 2 I o

I NOTE _ _ I UNIT I I

WHEN UNITS ARE TWINNEB FOR SINGLE FI

TO CHAN_E MOTOR SPEED TAP AND

FOR BLOWER SPEEB ELECTION

PROCEDURE,REFER TO INSTALLATION

INSTRUCTION

[_PORTANT TO PREVENT WOTOR |

6URNOUT,NEVER CONNECT MORE

THAN ONE _OTOR LEAD TO ANY

ONE CONNECTION. >

LI J •

I o0ou.o

EOUIPMENT

UL_CHIHIIUN

KEY COMPONENT

AI5 gONTRBL 5LO_ER

_ MOTOR 5LBWER

R4 CAPACITOR BLGWER _OTOR

K3, I REL4Y BLOWER

KI3. I REL4Y COMSUSTION AIR 5LO.

K36, I RELAY HEAT BLOWER

K46, I RELAY BLOWER [NTERLOCKIIJ

K92 2 RELAY 5LO_ER INTERLGCK[2]

KI05 RELAY BOOR INTERLOCK(I]

<lOB, I RELAY BOOR [NTERLOCKI21

_I07 1 2 : RELAY CONTINUOUS BLOWER

KIBg. I RELAY ACCESSORY

KIP5 RELAY HEAT SHUTOFF

PPD PILIQ _AS

=#3 PLUG BLOWER MGTOR

£51 SWITCH DOOR INTERLOCK

S6B. 3.4 SWITCH CONTINUOUS BLOWER

111592 ,SECONDARY

(2)£92 S_[TCH LIM[TSECONDARY

TI TRAN£FORWER CONTROL

TB21 TERMINAL STRIP T_IN KIT

/•

'TB21

]rm 0

24v i

TBZI

_125

NOTE

iF ANY _IRE IN THIS APPLIANCE iS REPLACEB.

IT MUST BE REPLACEB _ITH _[RE OF LIKE SIZE,

RATIN6 ANB INSULATION THICKNESS, IF RATING

4ND [NSUL4TION ARE UNKN_N_ USE SAME _IZE

THERMOPLASTIC I05_C _IRE _[TH _/64"

INSULATION THICKNESS

I i

I _ _ _ 24v COMMON

BURNOUT,NEVER CONNECT MORE

THAN gNE _OTOR LEAB TO ANY

ONE CONNECTION.

HEAT I WiRE IS NBT USEB

FOR TWO STAGE HEAT

APPLICATIONS,

Z_ HE4T 2 WIRE IS USEB

FOR TWO STA6E HEAT

APPLICATION5 ONLY

,_, ADB KI09 RELAY FOR ACCESSBRY

£PBTIO AMP, 2_ V4C COIL

NOTE

LI <J |

TOZI_ [

ANB INSULAT[gN ARE UNKNg'/_N, USE SAME SIZE

THERMOPLASTIC I05aC _[RE WITH 4/64"

[NSULATIGN THICKNESS_

uEounlrl_Ul_

mKEY COMPONENT

AI5 :ONTROL BLOWER

_qT_R RIn_FR

P2oC_:APAC[TOR?_I_ BLOWER _OTOR

P43 JACK 6LO_ER MOTOR

tELA¥ BLOWER

IKI05 I _EL4Y DOOR INTERLOCK[I] I

IKI05 _EL4Y DOOR INTERLOCK[Z] I

IKI07 I.Z.3 _FIAY CqNT_N[Jn[I_ _I_FR I

TB21 p20 'LUG 8AS

p¢3 'LUG 5LO_ER _OTOR

£51 ;_ITCH BOOR INTERLOCK

)_ _8 m2 ,WITCH CO,TINUGUS _LOWERR4NSFOR_ER CONTROL

) _ _FR_N_ _TRfP T_lN KfT

LiNE VOLTAGE,FIELB IN£TALLEB

24 VBLT NEC/CEC CLASS 2

F[ELB INSTALLEB

FACTBR¥ _IR[N8

',_2

I ITB21

TB21[6]

_En_ ........ WIRINGBIAGRAMI#_#

HEATING UNITS GAS

TWIN KIT 2 APPLICATION FOR

GHI9 SERIES

HEAT[NB SECT[ON IA UNIT I.STAGE I

su_,_a_ ro,m No I

HEATING SECTION 2A UNiT 2,£TAGE 2

HEATING UNIT5 GAS

TWIN KIT 2 APPLICATION FOR

GHI9 SERIES

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Ill

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120/60/12

WIRE U5EO FOR TWO 5TABE

,_x HEAT ONLY.

APPLICATIONS

WIRE U£ED FOR £INGLE £TABE

,_XHEAT APPLICATION5 ONLY.

551

AI5

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UN[T NO. I

$92

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120/60/I

N _

TWIN KIT 2 APPLICATION

(G20,G20R,78UGF,78RGF

825,626 SERIES UNITS)

UNIT NO 2

J L

DESCRIPTION

(EY COMPONENT

_15 ]ONTROL BLOWER

t3 _OTOR BLOWER

J#3 JACK BLGWER MOTOR

"45 uLU8 BLOWER MOTOR

;51 3WITCH BOOR INTERLOCK

_92 _W[TCH L[N[TISECONDARY }

B21 ERMINAL STRIP TWIN KIT

,LINE VOLTAGE FIELD INSTALLED

24 VOLT FIELD INSTALLED

_ -- _NEC/CEC CLASS 2

NOTE ALL REMAINING WIRES

FACTORY INSTALLED

$51 I

AI5 I

:;;;;[A]

$92

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2_V POWER 24V POWER

• i

I UNIT 2 i

m -11

"4 m

TO CHANGE MOTOR SPEEO TAP ANO I

FOR BLOWER SPEED SELECTION i

PROCEDURE,REFER TO ]N£TALLATiON _ •

[NSTRUCTIQN I /

IMPORTANT TO PREVENT MOTOR

BURNOUT,NEVER CONNECT MORE

THAN ONE MOTOR LE4B TO ANY

ONE CONNECTION_

T I

2#V I

[_ T521

KI25

(EY COMPONENT

AI5

_3 _OTOR BLOWER

=i FUSE TRANSFOR_ER.TI

J43

_EL4Y BLOWER

(36, I _ELAY HEAT BLOWER

1g2(462 _IELAY BLO_R ]NTERLOCK I

(I05 _FIA¥ nn_R TNTFRInCK_II

{ 06 _ELA¥ DOOR [NTERLOCK_

_IELAY ACCE££QRY

(I_ _ELAY NEAT.SHUTOFF

_51 _ITCH BOOR INTERLOCK

_WITCH LI_[T£ECONDARY

(2)$92 S_[TCH LIMIT.SECONOARY

RANSFORMER CONTROL

NOTE

IF ANY WIRE IN THIS APPLIANCE [£ REPLACEO,

IT _UST BE REPL4CED _[TH _IRE gF LIKE SIZE_

RATING AND [N£ULATION THiCKNES£_ IF RATING

ANB INSULATION 4RE UNKNOWN, USE 5A_E SIZE

TNER_QPLAST[C IQ5°C _[RE _]TH _/6#"

[NSUL4TION THICKNESS

BLOWER (8]

NOffE

WHENUNITS ARE TW[NNEO FOR SINGLE

STAGE ,ADO HEAT ANTICIPATION SETff[NGS

OF EACH FURNACE TOGETHER IF THIS IS

HIGHER THAN THE NEAT ANTICIPAffION SETTING

OF THE THERMOSTAT, AN ISOLATION RELAY

MUST BE U£EO,

BLOWER IG)

NE4T I(Wl]

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L I •

2 STAGE HEAT 2 iW2]

[]!

INSTRUCTION

-- INPORTANT TO PREVENT NOTOR

_ow BURNOUT¸ NEVER CONNECT _ORE

_ THAN ONE _BTOR LEAD TO ANY

QNE CONNECTiQN.

NEAT I WIRE IS NOT

USED FOR TWO STAGE

NEAT APPLICATIONS¸

NEAT 2 WIRE ]S USEO

FOR TWO STAGE HEAT

4PPLICAT[ONS ONLY

2_V COMNON 24V COMMON

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UL_CHIHILUN

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AI5 ]ONTROL BLOWER

B3 _nTnR RI_WFR

C_ SAPACITgR BLOWER _OTOR

J_3 lACK BLQWER NOTOR

K3, I ELAY BLQ_ER

KI3 I ELAY CO_BU£TION AiR

K36, I IELA¥ HEAT BLOWER

K¢6, I _ELA_ BLOWER INTERLOCK[I]

I_LAT _LU_H _NILHLUgKIZi

_ELAY O00R INTERLOCK[I]KI05 I

IELAY DOOR INTERLOCK[2]

IELA¥ ACCE££OR¥

KI25 1,2 _ELA¥ HEAT,SHUTOFF

p¢3 'LUG BLOWER MOTOR

551 _W[TCH DOOR INTERLOCK

TI RANSFOR_ER CONTROL

TB21 ERMINAL £TRiP TWIN KiT

I ° 1....I

_.ENNBX,_,,,.,_ WIRING BIAGfiA_6/£_

HEATING UNITS GAS

TWIN KIT 2 APPLICATION FOR

G20,G2QR SERIES

78UGF 78RGF £ERIE£

625, 826 SERIES

NOTE

IF ANY WIRE IN THI£ APPLIANCE [£ REPLACED,

IT _UST BE REPLACED WITH _IRE OF LiKE SIZE_

RATING AND INSULATION TNiCKNE££_ iF RATING

ANB ]NSULAT[QN ARE UNKNQ_N, USE SA_E SIZE

TNER_OPLA£T[C 105°C WIRE _ITH _/6_ _

INSULATION THiCKNES5_

I LINE VOLT4GE,FIELO INSTALLEO

24 VOLT NEC/CEC CL4SS 2,

FIELD INSTALLED

FACTORY _IRINB

2_V POWER (R)

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_ KI25 I

T_ _t _ ..... (91)

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HEATING UNITS GAS J

TWIN KIT 2 APPLICATION FOR

G2Q,G20R SERIES

78UBF78RGF SERES

_TO_SIO_6 5ERIE5

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co m

120/60/12

WIRE U5EO FOR TWO 53AOE

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WIRE U£EO FOR £INGLE £TAGE

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UN[T NO I

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DE£CR[PTION

IEY COMPONENT

t28 ZONTROL FAN TIMER (F3CI

53 _O_OR BLOWER

(3 RELAY BLOWERMOTOR

<36 qELAY NEAT 6LOWER

J43 JACK BI nWFR MOTOR

=43 PlUG 61nWFR MOTOR

_51 £WITCN DOOR INTERLOCk

592 SWITCH LIMIT(£ECONOARY I

[BI TERMINAL STRIP LOW VOLTAGE

TB2 TERMINAL 5TRIP UNIT

TO21 TERMINAL STRIP TWIN KIT

LINE VOLTAGE FIELD IN£TALLED

Z4 VOLT FIELD IN5TALLED

NEC/CEC CLA££ 2

NOTE ALL REMAININO WIRE5

FACTORY INSTALLED

551

• I

NOTE IF ANY WIRE IN THIS APPLIANCE [5 REPLACEB, IT

MUST BE REPLACED WITH WIRE OF LIKE £12E, RATING

AND INSULATION THICKNESS. IF RATIN6 AND INSULATION

ARE UNKNOWN, USE SAME SIZE THERMOPLASTIC 105°C

WIRE WITH 5/6_ _ INSULATION THICKNESS

NOTE

WHEN UNITS ARE TWINNED FOR S[NGLE

STAGE,ADD HEAT ANTiCiPATiON £E_TING£

OF EACH FURNACE TOGETHER iF THIS IS

HIBHER THAN THE HEAT ANTiCiPATiON SE_TIN8

OF THE THERMOSTAT, AN ISOLA_[ON RELAY

_UST BE USED.

IMPORTANT TO PREVENT _OTOR

BURNOUT,NEVER CONNECT _ORE

THAN ONE MOTOR LEAD TO ANY

ONE CONNECTION.

_TO CHANGE MOTOR SPEED TAP AND

FOR 5LBWER SPEED SELEgTIBN

PROCEDURE,REFER TO [NSTALLA

TION [NSmUgTION.

._ 571 AND JP69 USED ON

GSR21B SERIES UNITS ONLY

--DENOTE50PT[BNAL COMPBNENTS

OLBCHIHIION

KEY COMPONENT

APA :ONTRnl FAN T_MFR(FTC]

B3 IOTOR BLOWER

C_ :APACITOR BLOWER _OTOR

FI USE TRANSFORMER.TI

J_ JACK BLOWER HOTDB

K_ I _ _nNTACTBR RIO_FR RFIAY

_6 I _EL_Y HEAT BLB_ER

K_6 2 _ELAY 5LB_ER [NTERLOCKfll

K92. 2 ]Flay _IN_FR TNTFRIBC_I_I

KI05 _FIAY BOOR _NTFRIBCKII]

KI06 I _ELAY DOOR [NTERLOCK[21

KI25 ]ELAY HE_T 5HUTBFF

p¢_ _LU6 BLOWER MOTOR

351 _ITCH BOBR INTERLOCK

71 _TCH ALIX_I TARY FAN

s,l_g__ITOHLIMITSEOONO_RYJ

I_Sg2_ITC.L_MIT/SECO.DARY,

TI mANSFORMER CONTROL

TBI FR_TN_I STRIP I_ Wl T

TB2 fERM[N_L STRIP UNIT

TB I 2_V

A28

F 7

(z)sgz

]FI

2_V

HEAT 2 (W2]

TWO STAGE

2€v

COMMON

,J69_

_69

TB21

_J_5

2_V POWER TB I

NOTE IF ANY WIRE ]N TH[_ APPLIANCE IS REPLACED' ]T i A28_

_UST BE REPLACED WITH _[RE OF LIKE SIZE_ RATIN8

AND INSULATION THICKNESS. IF RATING AND IN£ULATIBN

_RE UNKNOWN, USE SAME SIZE THERMOPLAST[g 105og

_]RE _[TH 5/64 _ INSULATION THICKNESS I I

2_V

POWER

BLOWER (G)

HEAT I (I)

HEAT2 (2)

w[_PORTANT TO PREVENT _OTOR

BURNOUT, NEVER CONNECT MORE

i THAN ONE _OTOR LEAO TO ANY

ONE CONNECTION

A TO CHANOE _OTOR SPEED TAP AND

o FOR BLOWER £PEEO SELECTION

PROCEDURE,REFER TO ]NSTALLA

T]ON [NSmUCTION

_° Z_ HEAT I WIRE IS NOT USEO

FOR T_O £TAOE HEAT

APPLICATIONS.

Z_ HEAT 2 WIRE [£ U£EO

FOR TWO STARE HEAT

APPLICATIONS ONLY

TB2

[]

TB2

4 I

_EY

_P8

{_, 1,2

1_6. 2

t92 I

11o5 I

11o6

351

f51

TB21

KI25 I BLOWER (B]

4_}K_aFOq_ HEAT_mq

TB21 KI25 2 TB21

[]

24V

COMMON

<zo

o_w

ww_

Jw_

b_H

_'_ _/ '_.......i_¢_

A28

EOU]PMEN 7

CONTROl FAN TT_FR[FTC]

MOTOR BLOWER TB21

CAPAC]TOR BLOWER MOTOR 6

FUSE TRANSFSR_JER,TI

JACK BLOWER _OTOR

CONTACTOR BLOWER RELAY

RELAY HEAT BLOWER

RELAY BLOWER INTERLOCK[ I]

RFI _Y RI nWFR [NTFRI nCKtP)

RELAY DOOR iNTERLOCK[ I]

RELAY BOOR INTERLOCK[21 %/_, _J43

RELAY HEAT SHUTOFF

PLU6 BLOWER _OTOR _4_: ¢'

£_ITCH BOOR INTERLOCK _ •

SWITCH AUXILIARY FAN

TERMINAL STRIP LOW VDLT _

TERMINAL STRIP UNIT

TERMINAL STRIP T_[N K]T

,J69_

,p69 L

_TB2

B21

iznnx_ I _'_ i

T_IN KIT 2 APPLICATION FOR

G21O SERIES

OGR210 SERIES

HEATING SECTION 2A UNIT 2, STAGE 2

529,702W

-- LINE VOLTAOE,F[ELO INSTALLED

2_ VOLT,NEC/CEC CL_££ 2

F]ELD [NSTALLEO

FACTBR¥ _]R[NG

I ° I....I

HEATING UNITS GAS

TWIN KIT 2 APPLICATION FOR

G21Q SERIES

GSR2 I0 SERIES

HEATING SECTION A UNIT STAGE P

@lgga Le.*o, I.a.,trl_. [*_ Li fhe U S,A,

LENNOX Furnace/Heater, Gas Manual L0806829

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