Allied Air Enterprises 506271-01 installation instructions Installing the Vent Cover

Minimum horizontal clearance of 4' from electric meters, gas meters, regulator, and relief equipment is required.

In addition to the above requirements, consideration must be given to prevent unwanted ice buildup from the vent condensate. The vent should not be located on the side of a building where the prevailing winter winds could trap the moisture, causing it to freeze on the walls or on overhangs (under eaves). The vent location should not discharge over 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 Cover

For shipping purposes, the unit is shipped with the vent cover packaged in the unit supply air compartment. Retrieve the vent cover from the supply air compartment.

To attach the vent cover to the unit:

1.Locate the vent screen. It is packed in the plastic bag that contains these Installation Instructions.

2.Remove the two screws that will be used to attach the screen to the unit (see Figure 2).

3.Center the screen over the hole and re-insert the screws removed in Step 2.

4.Remove the 4 screws that will be used to attach the vent cover (see Fig. 3). Install the vent cover using these screws. A properly installed vent cover will not extend above the top of the unit.

Installing the Vent Cover

Screen

Screen attachment screws

Vent Cover Attachment Screws (Plus 2 on other side)

Vent Cover

Figure 2

NOTE:

If a gas furnace that’s connected to a common venting system is being removed when this package unit is installed, then read and follow the instructions in the “Removal of Unit from Common Venting System” section that follows. Otherwise, you

may skip this section.

Removal of Unit from Common Venting System

When an existing furnace is removed from a common venting system serving other appliances, the venting system is likely to be too large to properly vent the remaining attached appliances. The following test should be conducted with each appliance while the 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 and determine there is no blockage or restriction, leakage, corrosion, or other deficiencies which could cause an unsafe condition.

3.Insofar as is practical, close all building doors and windows between the space in which the appliances remaining connected to the common venting system are located and other spaces in the building. Turn on clothes dryers and any appliance not connected to the common venting system. Turn on exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers.

4.Following the lighting instructions, place the unit being inspected in operation. Adjust the thermostat so the appliance will operate continuously.

5.Test for spillage at the draft control relief opening after 5 minutes of main burner operation. Use the flame of a match or candle.

6.Follow the preceding steps for each appliance connected to the common venting system.

7.After it has been determined that each appliance remaining connected to the common venting system properly vents when tested as outlined above, return doors, windows, exhaust fans, fireplace dampers, and any other fuel burning appliance to their previous condition of use.

8.If improper venting is observed during any of the above tests, the common venting system must be corrected.

See National Fuel Gas Code, ANSI Z223.1 (latest edition) or CAN/CGA B149.1 & .2 Canadian Installation Codes to correct improper operation of common venting system.

Page 4 of 14 Issue 0921 506271-01