ML180UHE Gas Furnace
The ML180UHE unit is shipped ready for installation in the
upflow or horizontal right position (for horizontal left posi- tion the combustion air pressure switch must be moved) fueled by natural gas. A conversion kit (ordered separate-
ly) is required for use in LP/Propane gas applications. The furnace is shipped with the bottom panel in place. The bot- tom panel must be removed if the unit is to be installed in a horizontal application. The panel may also be removed in upflow applications.
Shipping and Packing List
Package 1 of 1 contains
1 − Assembled ML180UHE unit
1 − Bag assembly containing the following:
2 − Screws
1− Snap bushing
1− Snap plug
1− Wire tie
1− Vent warning label
1− Owner’s manual and warranty card
The following items may be ordered separately: 1 − Thermostat
1 − Suspension kit (for horizontal installations)
1 − LP/Propane changeover kit
1 − Return air base
1 − High altitude kit
1 − Side filter kit
Check equipment for shipping damage. If you find any damage, immediately contact the last carrier.
Safety Information
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 floor and may be difficult to smell. An LP/propane leak detector should be installed in all LP applications.
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 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.
Certifications
ML180UHE units are CSA International certified to ANSI Z21.47.
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 Fuel Gas Code
American National Standards Institute, Inc.
11 West 42nd Street
New York, NY 10036
Clearances
Adequate clearance must be made around the air open- ings into the vestibule area. In order to ensure proper unit operation, combustion and ventilation air supply must be provided according to the current National Fuel Gas Code.
Vent installations must be consistent with the National Fuel
Gas Code venting tables (in this instruction) and applicable provisions of local building codes.
This furnace is CSA International certified for installation clearances to combustible material as listed on the unit
nameplate and in the tables in figures 8 and 12. Accessibility
and service clearances must take precedence over fire protection clearances.
NOTE − For installation on combustible floors, the furnace shall not be installed directly on carpeting, tile, or other combustible material other than wood flooring.
Installed Locations
For installation in a residential garage, the furnace must be installed so that the burner(s) and the ignition source are located no less than 18 inches (457 mm) above the
floor. The furnace must be located or protected to avoid
physical damage by vehicles. When a furnace is installed
in a public garage, hangar, or other building that has a haz- ardous atmosphere, the furnace must be installed accord-
ing to recommended good practice requirements and cur- rent National Fuel Gas Code.
Temperature Rise
NOTE − Furnace must be adjusted to obtain a temperature rise within the range specified on the unit nameplate. Failure to do so may cause erratic limit operation and may result in premature heat exchanger failure.
This ML180UHE furnace must be installed so that its elec-
trical components are protected from water.
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