Lennox EL196UH030XE24B Owner's manual

Page 1
©2019 Lennox Industries Inc.
Litho U.S.A.
Corp 1805-L1
Revised 04/2022 EL196UHE
Service Literature
EL196UHE SERIES UNITS
EL196UHE series units are high-efficiency gas fur
naces manufactured with Lennox DuralokPlustalumi
nized steel clamshell-type heat exchangers, with a stainless
steel condensing coil. EL196UHE units are available in
heating input capacities of 30,000 to 110,000 Btuh and cool
ing applications from 2 through 5 tons. Refer to Engineering
Handbook for proper sizing.
Units are factory equipped for use with natural gas. A kit is
available for conversion to LP/Propane operation. All
EL196UHE units are equipped with a hot surface ignition
system. The gas valve is redundant to assure safety
shut-off as required by C.S.A.
The heat exchanger, burners and manifold assembly can be
removed for inspection and service. The maintenance section
gives a detailed description on how this is done.
All specifications are subject to change. Procedures outlined
in this manual are presented as a recommendation only
and do not supersede or replace local or state codes.
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 discon
nect switch(es). Unit may have multiple
power supplies.
Table of Contents
Specifications 2.................................
Optional Accessories 3..........................
Blower Performance Data 4......................
I-Unit Components 7............................
II Placement and Installation .................... 21
III-Start-Up ................................... 42
IV-Heating System Service Checks .............. 43
V-Typical Operating Conditions ................. 47
VI-Maintenance ............................... 48
VII-Sequence of Operation and Flow Charts ...... 51
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, person
al injury or loss of life. Installation and service must
be performed by a licensed professional HVAC in
staller (or equivalent), service agency or the gas sup
plier.
CAUTION
As with any mechanical equipment, contact with
sharp sheet metal edges can result in personal in
jury. Take care while handling this equipment and
wear gloves and protective clothing.

Page 2
SPECIFICATIONS
Gas
Heating
Performance
Model No. EL196UH030XE24B EL196UH045XE24B EL196UH045XE36B
1AFUE 96% 96% 96%
Input - Btuh 30,000 44,000 44,000
Output - Btuh 29,000 42,000 42,000
Temperature rise range - °F 30 - 60 40 - 70 35 - 65
Gas Manifold Pressure (in. w.g.)
Nat. Gas / LPG/Propane 3.5 / 10 3.5 / 10 3.5 / 10
High static - in. w.g. 0.5 0.5 0.5
Energy Star® Certied Yes Yes Yes
Connections
in.
Intake / Exhaust Pipe (PVC) 2 / 2 2 / 2 2 / 2
Gas pipe size IPS 1/2 1/2 1/2
Condensate Drain Trap (PVC pipe) - i.d. 3/4 3/4 3/4
with furnished 90° street elbow 3/4 slip x 3/4 Mipt 3/4 slip x 3/4 Mipt 3/4 slip x 3/4 Mipt
with eld supplied (PVC coupling) - o.d. 3/4 slip x 3/4 MPT 3/4 slip x 3/4 MPT 3/4 slip x 3/4 MPT
Indoor
Blower
Wheel nom. dia. x width - in. 10 x 8 10 x 8 10 x 8
Motor Type DC Brushless DC Brushless DC Brushless
Motor output - hp 1/2 1/2 1/2
Tons of add-on cooling 1 - 2 1 - 2 1.5 - 3
Air Volume Range - cfm 260 - 990 260 - 990 520 - 1345
Electrical Data Voltage 120 volts - 60 hertz - 1 phase
Blower motor full load amps 6.8 6.8 6.8
Maximum overcurrent protection 15 15 15
Shipping Data lbs. - 1 package 129 129 129
SPECIFICATIONS
Gas
Heating
Performance
Model No. EL196UH070XE36B EL196UH090XE48C EL196UH110XE60C
1AFUE 96% 96% 96%
Input - Btuh 66,000 88,000 110,000
Output - Btuh 63,000 85,000 106,000
Temperature rise range - °F 35 - 65 50 - 80 45 - 75
Gas Manifold Pressure (in. w.g.)
Nat. Gas / LPG/Propane 3.5 / 10 3.5 / 10 3.5 / 10
High static - in. w.g. 0.5 0.5 0.5
Energy Star® Certied Yes Ye s Ye s
Connections
in.
Intake / Exhaust Pipe (PVC) 2 / 2 2 / 2 2 / 2
Gas pipe size IPS 1/2 1/2 1/2
Condensate Drain Trap (PVC pipe) - i.d. 3/4 3/4 3/4
with furnished 90° street elbow 3/4 slip x 3/4 Mipt 3/4 slip x 3/4 Mipt 3/4 slip x 3/4 Mipt
with eld supplied (PVC coupling) - o.d. 3/4 slip x 3/4 MPT 3/4 slip x 3/4 MPT 3/4 slip x 3/4 MPT
Indoor
Blower
Wheel nom. dia. x width - in. 10 x 8 10 x 10 11-1/2 x 10
Motor Type DC Brushless DC Brushless DC Brushless
Motor output - hp 1/2 3/4 1
Tons of add-on cooling 1.5 - 3 2.5 - 4 3 - 5
Air Volume Range - cfm 550 - 1380 760 - 1740 1055 - 2220
Electrical Data Voltage 120 volts - 60 hertz - 1 phase
Blower motor full load amps 6.8 8.4 10.9
Maximum overcurrent protection 15 15 15
Shipping Data lbs. - 1 package 134 158 170
NOTE - Filters and provisions for mounting are not furnished and must be eld provided.
1 Annual Fuel Utilization Efciency based on DOE test procedures and according to FTC labeling regulations. Isolated combustion system rating for non-weatherized furnaces.

Page 3
OPTIONAL ACCESSORIES - ORDER SEPARATELY
NOTE - FURNACES CANNOT BE TWINNED!
“B” Width
Models
“C” Width
Models
CABINET ACCESSORIES
Horizontal Suspension Kit - Horizontal only 51W10 51W10
Return Air Base - Upow only 50W98 50W99
High Performance Economizer (Commercial Only) 10U53 10U53
CONDENSATE DRAIN KITS
Condensate Drain Heat Cable 6 ft. 26K68 26K68
24 ft. 26K69 26K69
Heat Cable Tape Fiberglass - 1/2 in. x 66 ft. 36G53 36G53
Crawl Space Vent Drain Kit US 51W18 51W18
Canada 15Z70 15Z70
CONTROLS
Blower Relay Kit (for two-stage outdoor units) 85W66 85W66
FILTER KITS
1Air Filter and Rack
Kit
Horizontal (end) Size of lter - in. 87L96 - 18 x 25 x 1 87L97 - 20 x 25 x 1
Side Return Single 44J22 44J22
Ten Pack 66K63 66K63
Size of lter - in. 16 x 25 x 1 16 x 25 x 1
SERVICE KIT
Night Service Kit 84W48 84W48
TERMINATION KITS
See Installation Instructions for specic venting information.
Termination Kits -
Direct Vent
Applications Only
Concentric US - 2 in. 71M80 69M29
3 in. - - - 60L46
Canada - 2 in. 44W92 44W92
3 in. - - - 44W93
Flush-Mount US - 2, 2-1/2 or 3 in. 51W11 51W11
Canada - 2, 2-1/2 or 3 in. 51W12 51W12
Wall - Close
Couple
US - 2 in. 22G44 - - -
3 in. 44J40 44J40
Wall - Close
Couple WTK
Canada - 2 in. 30G28 - - -
3 in. 81J20 81J20
Termination Kits -
Direct or Non-Direct
Vent
Roof 2 in. 15F75 15F75
Wall Ring Kit 2 in. 15F74 315F74
Roof Termination Flashing Kit - Direct or Non-
Direct Vent (2 ashings)
3 in. 44J41 44J41
1 Cleanable polyurethane frame type lter.
2 Kits contain enough parts for two, non−direct vent installations.
3Non-direct vent only.
NOTE - Termination Kits (44W92, 44W93, 30G28, 51W12, 51W19, 81J20) and Crawl Space Vent Drain Kit (15Z70) are certied to ULC S636 standard for use in
Canada only.

Page 4
Blower Data
EL196UH030XE24B AND EL196UH045XE24B PERFORMANCE (Less Filter)
External
Static
Pressure
in. w.g.
Air Volume / Watts at Various Blower Speeds
High Medium-High Medium Medium-Low Low
cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
0.00 1125 160 1015 125 935 105 830 65 905 70
0.10 1070 165 980 130 885 110 775 70 700 60
0.20 1035 175 950 140 845 115 715 75 560 50
0.30 1000 185 915 150 810 125 670 85 495 55
0.40 965 195 875 160 770 135 625 95 435 60
0.50 925 205 835 170 730 140 580 100 365 65
0.60 890 215 800 180 685 150 530 105 325 70
0.70 855 225 770 190 635 155 485 110 270 75
0.80 820 230 720 195 600 165 430 115 230 80
EL196UH045XE36B PERFORMANCE (Less Filter)
External
Static
Pressure
in. w.g.
Air Volume / Watts at Various Blower Speeds
High Medium-High Medium Medium-Low Low
cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
0.00 1460 335 1285 235 1190 170 910 85 870 75
0.10 1430 350 1260 245 1155 185 885 95 830 85
0.20 1405 365 1235 255 1125 200 860 105 800 90
0.30 1375 370 1205 265 1090 210 825 115 755 95
0.40 1350 380 1175 275 1055 215 780 125 710 105
0.50 1315 385 1145 285 1020 230 735 130 665 115
0.60 1245 375 1110 295 980 240 685 140 620 125
0.70 N/A N/A 1070 305 940 250 640 145 575 135
0.80 N/A N/A 1020 310 905 260 600 155 530 140
EL196UH070XE36B PERFORMANCE (Less Filter)
External
Static
Pressure
in. w.g.
Air Volume / Watts at Various Blower Speeds
High Medium-High Medium Medium-Low Low
cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
0.00 1445 315 1315 215 1215 165 930 85 925 75
0.10 1445 335 1275 230 1170 180 905 94 860 80
0.20 1415 345 1240 240 1125 190 870 101 800 85
0.30 1380 355 1205 250 1090 200 830 109 760 95
0.40 1345 370 1175 265 1055 210 790 117 710 105
0.50 1315 385 1150 280 1020 220 735 129 665 115
0.60 1275 390 1110 290 985 230 685 137 625 125
0.70 1210 395 1075 300 950 240 640 146 565 130
0.80 N/A N/A 1030 305 915 250 595 148 535 135

Page 5
Blower Data
EL196UH090XE48C PERFORMANCE (Less Filter)
External
Static
Pressure
in. w.g.
Air Volume / Watts at Various Blower Speeds
High Medium-High Medium Medium-Low Low
cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
0.00 1765 375 1535 250 1410 180 1315 155 1155 115
0.10 1735 390 1500 260 1365 200 1270 165 1130 125
0.20 1700 405 1465 275 1330 215 1230 175 1095 135
0.30 1660 425 1435 290 1295 225 1195 190 1055 145
0.40 1640 435 1400 300 1265 235 1165 200 1010 155
0.50 1615 450 1370 315 1230 250 1125 215 965 165
0.60 1575 465 1340 325 1190 265 1080 230 925 180
0.70 1530 470 1305 340 1150 280 1045 235 885 190
0.80 N/A N/A 1260 345 1115 285 1000 245 845 195
EL196UH110XE60C PERFORMANCE (Less Filter)
External
Static
Pressure
in. w.g.
Air Volume / Watts at Different Blower Speeds
Bottom Return Air, Side Return Air with Return Air from Both
Sides or Return Air from Bottom and One Side.
Single Side Return Air − Air volumes in bold require
Optional Return Air Base and eld fabricated transition to
accommodate 20 x 25 x 1 in. air lter in order to maintain
proper air velocity.
High Med-High Medium Med-Low Low High Med-High Medium Med-Low Low
cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
0.00 2220 655 1975 440 1800 325 1665 390 1050 180 2180 685 1910 460 1750 345 1660 285 1430 195
0.10 2185 680 1925 460 1750 345 1625 285 1440 200 2155 705 1885 480 1720 360 1610 295 1415 205
0.20 2150 705 1880 480 1710 365 1590 300 1390 220 2130 725 1855 495 1685 380 1565 305 1380 220
0.30 2110 720 1850 495 1680 380 1560 320 1350 230 2085 745 1825 510 1655 390 1535 325 1335 230
0.40 2080 735 1810 520 1650 405 1515 330 1310 245 2060 760 1795 530 1625 405 1495 340 1295 245
0.50 2045 755 1785 530 1610 415 1470 350 1265 255 2030 775 1765 545 1585 425 1450 355 1255 265
0.60 2010 775 1740 545 1575 430 1440 370 1220 270 1995 785 1725 565 1550 435 1420 370 1205 275
0.70 1980 790 1705 565 1525 450 1400 375 1170 280 1960 795 1690 575 1505 455 1385 385 1165 290
0.80 1950 795 1670 580 1485 460 1360 390 1140 293 1895 790 1650 590 1465 470 1335 395 1120 295

Page 6
EL196UHE PARTS IDENTIFICATION
FIGURE 1
TOP CAP
BURNER BOX
ASSEMBLY
DuralokPlusTM
HEAT EXCHANGER
ASSEMBLY
CONTROL BOX
(includes integrated ignition control, trans
former, circuit breaker and interlock switch)
COMBUSTION AIR
INDUCER
OUTER
ACCESS
PANEL COMBUSTION
AIR PRESSURE
SWITCH
PRIMARY LIMIT
GAS VALVE
BLOWER
ASSEMBLY
FLEXIBLE NO-HUB
EXHAUST COLLAR
COLD END
HEADER BOX
BAG ASSEMBLIES
(shipping location)
BLOWER ACCESS
PANEL

Page 7
I-UNIT COMPONENTS
ELECTROSTATIC DISCHARGE (ESD)
Precautions and Procedures
CAUTION
Electrostatic discharge can affect elec
tronic components. Take precautions
to neutralize electrostatic charge by
touching your hand and tools to metal
prior to handling the control.
EL196UHE unit components are shown in figure 1. The
combustion air inducer, gas valve and burners can be ac
cessed by removing the outer access panel. The blower
and control box can be accessed by removing the blow
er access panel.
A-Control Box Components (Figure 2)
Unit transformer (T1) and integrated ignition control (A92)
are located in the control box. In addition, a door interlock
switch (S51) is located in the control box.
FIGURE 2
EL196UHE Control Box
Integrated Control
Door Interlock
Switch
Transformer
Circuit Breaker
1. Transformer (T1)
A transformer located in the control box provides power to
the low voltage section of the unit. The transformers on all
models are rated at 40VA with a 120V primary and 24V
secondary.
2. Door Interlock Switch (S51)
A door interlock switch rated 14A at 120VAC is located on
the control box. The switch is wired in series with line volt
age. When the blower door is removed the unit will shut
down.
3. Circuit Breaker (CB8)
A 24V circuit breaker is also located in the control box. The
switch provides overcurrent protection to the transformer
(T1). The breaker is rated at 3A at 32V. If the current ex
ceeds this limit the breaker will trip and all unit operation will
shutdown. The breaker can be manually reset by pressing
the button on the face.
4. Integrated Ignition Control (A92)
103217-03 & 107163-01
WARNING
Shock hazard.
Disconnect power before servicing. Control is not
field repairable. If control is inoperable, simply re
place entire control.
Can cause injury or death. Unsafe operation will re
sult if repair is attempted.
The hot surface ignition control system consisting of an in
tegrated control (figure 3 or 5 with control terminal desig
nations in tables 1, 2 and 3), sensor and ignitor (figure 6).
The integrated control and ignitor work in combination to
ensure furnace ignition and ignitor durability. The inte
grated control, controls all major furnace operations. The
integrated control also features a RED LED for trouble
shooting and two accessory terminals rated at (1) one
amp. See table 4 for troubleshooting diagnostic codes.
The nitride ignitor is made from a non-porous, high
strength proprietary ceramic material that provides long
life and trouble free maintenance.
TABLE 1
4-Pin Terminal Designation
PIN # FUNCTION
1Combustion Air Inducer Line
2Ignitor Line
3Combustion Air Inducer Neutral
4Ignitor Neutral
TABLE 2
12-Pin Terminal Designations
PIN # FUNCTION
1High Limit Output
2IFC 103217-03 Not Used
IFC 107163-01 Flame Sense
324V Line
4Not Used
5Rollout Switch Out
624V Neutral
7High Limit Input
8 Ground
9Gas Valve Common
10 Pressure Switch In
11 Rollout Switch In
12 Gas Valve Out

Page 8
TABLE 3
1/4” QUICK CONNECT TERMINALS
120HUM Humidifier 120VAC
LINE 120VAC
XFMR Transformer 120VAC
CIRC Indoor blower 120VAC
EAC Indoor air quality accessory 120VAC
NEUTRALS Common 120VAC
HUM24 Humidifier 24VAC
3/16” QUICK CONNECT TERMINALS
COOL Cooling tap 24VAC
HEAT Heating tap 24VAC
FAN Continuous blower 24 VAC
PARK (no power) Park terminal for unused speed taps
FS Flame sense
24 COM Common 24VAC
TABLE 4
Ignition Control 103217-03
The integrated control is equipped with an LED light for troubleshooting. The diagnostic codes are listed below in table 4.
RED LED
Flash Code 2Diagnostic Codes / Status of Furnace
Off No power to control or board fault detected
Heartbeat
1
Normal Operation - Idle, Continuous Fan, Cool
Continuous Rapid
Flash Call For Heat / Burner Operation
1Reverse Line Voltage Polarity
2Improper Earth Ground
3Burner failed to light, or lost flame during heat demand
4Low Flame Signal - check flame sensor
5Watchguard - burner failed to light, exceeded maximum number of retries or recycles.
6Not Used
7Primary or Secondary Limit Open or Watchguard Mode - Limit Switch Open longer than 3 min
utes
8Rollout Switch Open
9Pressure Switch failed to close or opened during heat demand
10 Watchguard - Pressure Switch opened 5 times during one heat demand
11 Pressure Switch stuck closed prior to activation of combustion air inducer
12 Flame Sensed without gas valve energized
13 Low Line Voltage
Notes
Note 1 A ”Heartbeat” is indicated by a ”Slow Flash” - 1 sec on 1 sec off, repeating
Note 2 Error codes are indicated by a ”Rapid Flash” - the LED flashes X times at 1/2 sec on 1/2 sec
off, remains off for 3 sec, then repeats
Note 3
Last 10 error codes are stored in memory including when power is shut off to the unit. - To recall,
press and release button, most recent will be displayed first, LED off for 3 sec, then next error
code is displayed, etc. To clear error codes, depress and hold button longer than 5 seconds.

Page 9
FIGURE 3
BLOWER OFF DELAY
RED LED RECALL BUTTON
IGNITION CONTROL 103217-03
Electronic Ignition
On a call for heat the integrated control monitors the com
bustion air inducer pressure switch. The control board will
not begin the heating cycle if the pressure switch is closed
(by-passed). Once the pressure switch is determined to be
open, the combustion air inducer is energized. When the
differential in the pressure switch is great enough, the pres
sure switch closes and a 15-second pre-purge begins. If
the pressure switch is not proven within 2-1/2 minutes, the
integrated control goes into Watchguard-Pressure Switch
mode for a 5-minute re-set period.
After the 15-second pre-purge period, the ignitor warms up
for 20 seconds during which the gas valve opens at 19 sec
onds for a 4-second trial for ignition. The ignitor remains
energized for the first 3 seconds during the 4 second trial. If
ignition is not proved during the 4-second period, the inte
grated control will try four more times with an inter purge
and warm-up time between trials of 35 seconds. After a to
tal of five trials for ignition (including the initial trial), the inte
grated control goes into Watchguard-Flame Failure mode.
After a 60-minute reset period, the integrated control will
begin the ignition sequence again.
Fan Time Control - Ignition Control 103217-03
Heating Fan On Time
The fan on time of 30 seconds is not adjustable.
Heating Fan Off Time
Fan off time (time that the blower operates after the heat
demand has been satisfied) can be adjusted by moving the
jumper to a different setting. The unit is shipped with a fac
tory fan off setting of 90 seconds. For customized comfort,
monitor the supply air temperature once the heat demand
is satisfied. Note the supply air temperature at the instant
the blower is de-energized.
Adjust the fan-off delay to achieve a supply air temperature
between 90° - 110° at the instant the blower is de-ener
gized. (Longer delay times allow for lower air temperature,
shorter delay times allow for higher air temperature). See
figure 4.
Cooling Fan On Time
The fan on time is 2 seconds and is not adjustable.
Cooling Fan Off Time
The control has a 45 second fan off delay after cooling de
mand has been met. This delay is factory set and not ad
justable.
HEAT FAN‐OFF TIME IN SECONDS
To adjust fan-off timing, reposition jumper across pins to
achieve desired setting.
NO JUMPER
FIGURE 4
60 90
120
180
60 90
120
180
60 90
120
180
60 90
120
180
60 Second
off Time
90 Second
off Time
120 Second
off Time
180 Second
off Time

Page 10
TABLE 5
Ignition Control 107163-01
RED LED Flash Code Diagnostic Codes / Status of Furnace
Off No Power to Control or Board Fault Detected
On Board Fault Detected
Fast Heartbeat3Call for Heat / Burner Operation
Slow Heartbeat1Normal Operation – Idle, Continuous Fan, or Coo
1 Flash2Reverse Line Voltage Polarity or Phasing of 120V power
2 Flashes2Improper Earth Ground
3 Flashes2Burner failed to light, or lost flame during heat demand
4 Flashes2Low Flame Signal - check flame sensor
5 Flashes2Watchguard - burner failed to light, exceeded maximum number of retries or recycles. 1 hour lockout.
6 Flashes2Not Used
7 Flashes2Primary or Secondary Limit Open or Watchguard Mode - Limit Switch Open longer than 3 minutes
8 Flashes2Rollout Switch Open
9 Flashes2Pressure Switch failed to close or opened during heat demand, inducer on.
10 Flashes2Watchguard - Pressure Switch opened 5 times during one heat demand
11 Flashes2Pressure Switch stuck closed prior to activation of combustion air inducer
12 Flashes2Flame Sensed without gas valve energized
13 Flashes2Low Line Voltage
Notes
Note 1 A slow heartbeat is indicated by 1s on / 1s off. It is used for idle, continuous fan and cool modes.
Note 2 Error codes are indicated by a ”Rapid Flash” - the LED flashes X times at 1/2 sec on 1/2 sec off, remains
off for 3 sec, then repeats
Note 3 A fast heartbeat is indicated by 0.5s on / 0.5s off. It is only used during a heat call.
Note 4
Last 10 error codes are stored in memory including when power is shut off to the unit. - To recall, press
and release button, most recent will be displayed first, LED off for 3 sec, then next error code is displayed,
etc. To clear error codes, depress and hold button longer than 5 seconds.
FIGURE 5
IGNITION CONTROL 107163-01
Push Button
Error Recall
Diagnostic LED Heating Blower Off
Delay Selector Switch
FAN
HEAT
COOL
24VCOM
PARKS
HUM24
Ignition Control 107163-01
The heat fan-on time of 30 seconds is not adjustable. The
cool fan-on time of 2 seconds is not adjustable. The heat
fan-off delay (amount of time that the blower operates after
the heat demand has been satisfied) may be adjusted by
changing the two position dip switch on the integerated
control, to one of four selections. Blower off delay is factory
set at 90 seconds. For other blower off delay settings,
please refer to the following chart:
Blower Delay Select
SW2-1 SW2-2
60 OFF ON
90 OFF OFF
120 ON OFF
180 ON ON
Factory Setting is 90