ML193DF Gas Furnace
The ML193DF Category IV gas furnace is shipped ready for installation in the downflow position.
The furnace is equipped for installation in natural gas ap- plications. A conversion kit (ordered separately) is re- quired for use in propane/LP gas applications.
The ML193DF can be installed as a Direct Vent or Non− Direct Vent gas central furnace.
NOTE − In Direct Vent installations, combustion air is taken from outdoors and flue gases are discharged outdoors. In Non−Direct Vent installations, combustion air is taken from indoors and flue gases are discharged outdoors. See figure 2 for applications involving roof termination.
DIRECT VENT INSTALLATION | NON−DIRECT VENT | ||
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| INSTALLATION | |
| EXHAUST | EXHAUST | |
COMBUSTION | OUTLET | ||
OUTLET | |||
AIR INTAKE |
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OUTSIDE OF |
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HOUSE |
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COMBUSTION
AIR INTAKE INSIDE
OF HOUSE
ML193DF |
| ML193DF |
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FIGURE 2
Shipping and Packing List
Package 1 of 1 contains
1 − Assembled ML193DF unit
1 − Bag assembly containing the following:
3 − Wire nuts
1− Snap bushing
1− Snap plug
1− Wire tie
1− Condensate trap
1− Condensate trap cap
1− Condensate trap clamp
1− 2" diameter Air intake screen
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.
Check equipment for shipping damage. If you find any damage, immediately contact the last carrier.
The following items may also be ordered separately:
1 − Thermostat
1 − Propane/LP changeover kit
Safety Information
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.
Use only the type of gas approved for use with this furnace. Refer to unit nameplate.
ML193DF units are CSA International certified to ANSI Z21.47 and CSA 2.3 standards.
Building Codes
In the USA, installation of gas furnaces must conform with lo- cal 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
In Canada, installation must conform with current National Standard of Canada
In order to ensure proper unit operation in non−direct vent applications, combustion and ventilation air supply must be provided according to the current National Fuel Gas Code or
Locations and Clearances
This furnace is CSA International certified for installation clearances to combustible material as listed on the unit nameplate and in the table in figure 11. Accessibility and ser- vice clearances must take precedence over fire protection clearances.
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 or CSA B149 standards.
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