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UNIT INFORMATION
UNIT INFORMATION
S e r v i c e L i t e r a t u r e
©2016 Lennox Industries, Inc.
WARNING
I
mproper installation, adjustment, alteration,
service or maintenance can cause property damage,
personal injury or loss of life. Installation and service
must be performed by a licensed professional HVAC
installer (or equivalent), service agency or the gas
supplier.
CAUTION
As with any mechanical equipment, contact with
sharp sheet metal edges can result in personal
injury. Take care while handling this equipment and
wear gloves and protective clothing.
ML196DFE series units are high-efficiency gas furnaces
manufactured with Lennox DuralokPlus aluminized steel
clamshell-type heat exchangers, with a stainless steel
condensing coil. ML196DFE units are available in heating
input capacities of 44,000 to 110,000 Btuh and cooling ap
-
plications from 2 through 5 tons. Refer to Product Specifi
-
cations for proper sizing.
Units are factory equipped for use with natural gas. A kit
is available for conversion to LP/Propane operation. All
ML196DFE 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 out
-
lined 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 disconnect
switch(es). Unit may have multiple power
supplies.
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Blower Performance Data . . . . . . . . . . . . . . . . . . . . . . 4
I-Unit Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
II Placement and Installation . . . . . . . . . . . . . . . . . . . . 19
III-Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
IV-Heating System Service Checks . . . . . . . . . . . . . . 41
V-Typical Operating Conditions . . . . . . . . . . . . . . . . . 45
VI-Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
VII-Wiring and Sequence of Operation . . . . . . . . . . . 49
VIII-Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
ML196DFE
Corp 1910-L7
Revised 04/2022
ML196DFE SERIES UNITS
