a sidewalk, patio, or other walkway where the condensate could cause the surface to become slippery.
The products of combustion must not be allowed to accumulate within a confined space and recirculate.
Vent Hood
The unit is shipped with the vent hood, screen, and sheet metal screws packed in the plastic bag containing the Installation Instructions.
To attach the vent hood and screen to the unit:
1.Insert the vent screen into the vent tube so that the screen is flush with the end of the tube, as shown in Figure 4.
Installing Vent Hood
Front View | Top View |
|
|
| Vent Tube |
Screen |
| NOTE: |
| Screen | Screws should |
| pass through | |
|
| |
|
| sides of screen |
Vent Tube |
| to hold screen |
Screen is | Vent Hood in place. | |
|
| |
Slotted side of 
vent hood faces
condenser coil.
Figure 4
2.Position the vent hood over the vent tube so that the slotted side of the hood faces the condenser coil. Use the four sheet metal screws (provided) to secure the vent hood to the vent tube. The screws should pass through the sides of the screen in order to hold the screen in place.
Existing Venting Systems
When an existing furnace is removed or replaced, the original venting system may no longer be sized to properly vent the attached appliances. An improperly sized venting system can result in spillage of flue products into the living space, the formation of condensate, leakage, etc. See the accompanying WARNING box for proper test procedure.
WARNING
CARBON MONOXIDE POISONING HAZARD
Failure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon monoxide poisoning or death.
The following steps shall be followed for each appliance connected to the venting system being placed into operation, while all other appliances connected to the common venting system are not in operation:
1.Seal any unused openings in the common venting system.
2.Visually inspect the venting system for proper size and horizontal pitch, as required in the National Fuel Gas Code, ANSI Z223.1/NFPA 54 (latest edition) or the CSA B149.1, Natural Gas and Propane Installation Codes and these instructions. Determine that there is no blockage or restriction, leakage, corrosion, or other deficiencies which could cause an unsafe condition.
3.As far as practical, close all building doors and windows between the space in which the appliance(s) connected to the venting system are located and other spaces in the building.
4.Close fireplace dampers.
5.Turn on clothes dryers and any appliance not connected to the venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they are operating at maximum speed. Do not operate a summer exhaust fan.
6.Follow the lighting instructions. Place the unit being inspected in operation. Adjust the thermostat so appliance is operating continuously.
7.Test for spillage from draft hood equipped appliances at the draft hood relief opening after 5 minutes of main burner operation. Use the flame of a match or candle.
8.If improper venting is observed during any of the above tests, the venting system must be corrected in accordance with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 (latest edition) and/or the CSA B149.1, Natural Gas and Propane Installation Codes.
9.After it has been determined that each appliance remaining connected to the venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers, and any other
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