Lennox ML196UH070XE48B - Safety Information; Warning and Caution Statements

Page 3
ML196UHE Gas Furnace
The ML196UHE Category IV gas furnace is shipped ready for
installation in the upow or horizontal position. The furnace is
shipped with the bottom panel in place. The bottom panel must
be removed if the unit is to be installed in horizontal or upow
applications with bottom return air.
The ML196UHE can be installed as either a Direct Vent
or a Non-Direct Vent gas central furnace.
The furnace is equipped for installation in natural gas applica-
tions. A conversion kit (ordered separately) is required for use in
propane/LP gas applications.
NOTE - In Direct Vent installations, combustion air is tak-
en from outdoors and ue gases are discharged outdoors.
In Non-Direct Vent installations, combustion air is taken
from indoors or ventilated attic or crawlspace and ue
gases are discharged outdoors. See Figure 1 and Figure
2 for applications involving roof termination.
DIRECT VENT INSTALLATION NON-DIRECT VENT
INSTALLATION
EXHAUST
OUTLET
COMBUSTION
AIR INTAKE OUTSIDE
OF HOUSE
COMBUSTION
AIR INTAKE
INSIDE
OF HOUSE
EXHAUST OUTLET
Figure 1
NON-DIRECT VENT
INSTALLATION
NON-DIRECT VENT
INSTALLATION
COMBUSTION
AIR INTAKE INSIDE
VENTILATED
CRAWL SPACE
COMBUSTION
AIR INTAKE INSIDE
VENTILATED
ATTIC SPACE
EXHAUST
OUTLET
EXHAUST
OUTLET
Figure 2
Shipping and Packing List
Package 1 of 1 contains
1 - Assembled ML196UHE unit
1 - Bag assembly containing the following:
1 - Snap bushing
1 - 1/2” diameter threaded street elbow
1 - Snap plug
1 - Wire tie
1 - Condensate trap
1 - Condensate trap cap
1 - Condensate trap clamp
1 - 2” diameter debris screen
1 - 3/4” Threaded street elbow
Check equipment for shipping damage. If you nd any
damage, immediately contact the last carrier.
The following items may also be ordered separately:
1 - Thermostat
1 - LP/Propane changeover kit
1 - Return air base kit
1 - Horizontal suspension kit
1 - High altitude pressure switch
Safety Information
WARNING
Improper 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, personal injury can
result from contact with sharp sheet metal edges. Be
careful when you handle this equipment.
DANGER
Danger of explosion.
There are circumstances in which odorant used with LP/
propane gas can lose its scent. In case of a leak, LP/
propane gas will settle close to the oor and may be
di󰀩cult to smell. An LP/propane leak detector should be
installed in all LP applications.
Use only the type of gas approved for use with this fur-
nace. Refer to unit nameplate.
ML196UHE units are CSA International certied to ANSI
Z21.47 and CSA 2.3 standards.
Building Codes
In the USA, installation of gas furnaces must conform with
local building codes. In the absence of local codes, units
must be installed according to the current National