ML193UH Gas Furnace
The ML193UH Category IV gas furnace is shipped ready for installation in the upflow or horizontal position. The fur nace is shipped with the bottom panel in place. The bottom panel must be removed if the unit is to be installed in hori zontal or upflow applications with bottom return air.
The ML193UH can be installed as either a Direct Vent or a
The furnace is equipped for installation in natural gas ap plications. A conversion kit (ordered separately) is required for use in propane/LP gas applications.
NOTE - In Direct Vent installations, combustion air is taken from outdoors and flue gases are discharged outdoors. In
DIRECT VENT INSTALLATION | |
EXHAUST OUTLET | INSTALLATION |
COMBUSTION | EXHAUST |
AIR INTAKE OUTSIDE | OUTLET |
OF HOUSE |
|
COMBUSTION
AIR INTAKE
INSIDE
OF HOUSE
FIGURE 1
INSTALLATION | INSTALLATION | |
EXHAUST | EXHAUST | |
OUTLET | ||
OUTLET | ||
| ||
| COMBUSTION | |
COMBUSTION | AIR INTAKE INSIDE | |
VENTILATED | ||
AIR INTAKE INSIDE | ||
CRAWL SPACE | ||
VENTILATED | ||
| ||
ATTIC SPACE |
|
FIGURE 2
Shipping and Packing List
Package 1 of 1 contains
1 - Assembled ML193UH unit
1 - Bag assembly containing the following:
1- Snap bushing
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 find any damage, immediately contact the last carrier.
The following items may also be ordered separately:
1 - Thermostat
1 - Propane/LP changeover kit
1 - Return air base kit
1 - Horizontal suspension kit
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 in staller (or equivalent), service agency or the gas sup plier.
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 floor and may be difficult 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 furnace. Refer to unit nameplate.
ML193UH 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 local building codes. In the absence of local codes, units must be installed according to the current National Fuel Gas Code (ANSI‐Z223.1/NFPA 54). The National Fuel
Page 3
