Goodman Mfg VC8 instruction manual Exterior Masonry Chimneys Category I Furnaces only

EXTERIOR MASONRY CHIMNEYS - CATEGORY I FURNACES ONLY

heating/cooling costs but have created a problem supplying combustion and ventilation air for gas fired and other fuel burn- ing appliances. Appliances that pull air out of the house (clothes dryers, exhaust fans, fireplaces, etc.) increase the problem by starving appliances for air.

House depressurization can cause back drafting or improper combustion of gas-fired appliances, thereby exposing building occupants to gas combustion products that could include car- bon monoxide.

If this furnace is to be installed in the same space with other gas appliances, such as a water heater, ensure there is an adequate supply of combustion and ventilation air for the other appliances. Refer to the latest edition of the National Fuel Gas Code NFPA 54/ANSI Z223.1 or CAN/CSA B149 Installation Codes or applicable provisions of the local building codes for determining the combustion air requirements for the appliances.

This furnace must use indoor air for combustion. It cannot be installed as a direct vent (i.e., sealed combustion) furnace.

Most homes will require outside air be supplied to the furnace area by means of ventilation grilles or ducts connecting directly to the outdoors or spaces open to the outdoors such as attics or crawl spaces.

CATEGORY I VENTING (VERTICAL VENTING)

WARNING

TO PREVENT POSSIBLE PERSONAL INJURY OR DEATH DUE TO ASPHYXIATION, THIS FURNACE MUST BE CATEGORY I VENTED. DO NOT VENT USING CATEGORY III VENTING.

Category I Venting is venting at a non-positive pressure. A furnace vented as Category I is considered a fan-assisted ap- pliance and the vent system does not have to be “gas tight.” NOTE: Single stage gas furnaces with induced draft blowers draw products of combustion through a heat exchanger allow- ing, in some instances, common venting with natural draft ap- pliances (i.e. water heaters). All installations must be vented in accordance with National Fuel Gas Code NFPA 54/ANSI Z223.1 - latest edition. In Canada, the furnaces must be vented in ac- cordance with the National Standard of Canada, CAN/CSA B149.1 and CAN/CSA B149.2 - latest editions and amendments.

NOTE: The vertical height of the Category I venting system must be at least as great as the horizontal length of the venting system.

WARNING

TO PREVENT POSSIBLE PERSONAL INJURY OR DEATH DUE TO ASPHYXIATION, COMMON VENTING WITH OTHER MANUFACTURER’S INDUCED DRAFT APPLIANCES IS NOT ALLOWED.

The minimum vent diameter for the Category I venting system is as shown:

MODEL	MINIMUM VENT
	UPFLOW	COUNTERFLOW
70	4 inch	4 inch
90	4 inch	4 inch
115	5 inch	4 inch

Under some conditions, larger vents than those shown above may be required or allowed. When an existing furnace is re- moved from a venting system serving other appliances, the venting system may be too large to properly vent the remaining attached appliances.

Upflow or Horizontal units are shipped with the induced draft blower discharging from the top of the furnace. (“Top” is as viewed for an upflow installation.) The induced draft blower can be rotated 90 degrees for Category I venting. For horizontal installations, a four inch single wall pipe can be used to extend the induced draft blower outlet 1/2” beyond the furnace cabinet.

THIS PRODUCT IS NOT DESIGNED FOR COUNTERCLOCK- WISE INDUCED DRAFT BLOWER ROTATION.

Vent the furnace in accordance with the National Fuel Gas Code NFPA 54/ANSI Z223.1 - latest edition. In Canada, vent the furnace in accordance with the National Standard of Canada, CAN/CSA B149.1 and CAN/CSA B149.2 - latest editions and amendments.

Venting

THIS FURNACE IS NOT DESIGN CERTIFIED TO BE HORI- ZONTALLY VENTED.

To rotate the induced draft blower clockwise, you will need to purchase one (0270F01119) chimney transition bottom kit.

1.Disconnect electrical power from the furnace.

2.Disconnect the induced draft blower power leads, flue pipe, and pressure switch tubing.

3.Remove the round cutout from the right side of the wrapper.

4.Remove and save the four screws that fasten the induced draft blower to the flue collector box.

5.Remove and save the three screws that hold the chimney assembly to the induced draft blower.

6.Remove and save the four screws that fasten the chimney top to the chimney bottom.

7.Remove the chimney transition bottom from the transition bottom kit.

8.Install the chimney top with the four screws retained from step 6 onto the new chimney transition bottom from the transition bottom kit.

9.Install chimney assembly with the three screws retained from step 5 onto the induced draft blower.

10.Reinstall the induced draft blower rotating it 90 degrees clockwise from the original upflow configuration using the four screws retained in step 3. Ensure the gasket located between the induced draft blower and the collector box is rotated accordingly.

10