Operating instructions

ManualsBrandsBryant ManualsFurnace340MAV

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 venting system are not in operation:

1. Seal any unused openings in venting system.

2. Inspect the venting system for proper size and horizontal pitch, as required in the National Fuel Gas Code, ANSI Z223.1-2002/NFPA

54-2002 or the CSA B149.1, Natural Gas and Propane Installation Code and these instructions. Determine that there is no blockage

or restriction, leakage, corrosion and other deficiencies, which could cause an unsafe condition.

3. As far as practical, close all building doors and windows and all doors between the space in which the appliance(s) connected to the

venting system are located and other spaces of 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 appliance being inspected into 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 Z223.1-2002/NFPA 54-2002 and/or CSA B149.1, Natural Gas and Propane Installation Code.

9. After it has been determined that each appliance connected to the venting system properly vents when tested as outlined above, return

doors, windows, exhaust fans, fireplace dampers and any other gas-fired appliance to their previous conditions of use.

Vent system or vent connectors may need to be resized. For any

other appliances when resizing vent systems or vent connectors,

system or connector must be sized to approach minimum size as

determined using appropriate table found in the NFGC or NSC-

NGPIC.

B. Combustion-air and Vent Piping

GENERAL

Combustion-air and vent pipe, fittings, primers, and solvents must

conform to American National Standards Institute (ANSI) stan-

dards and American Society for Testing and Materials (ASTM)

standards. See Table 6 for approved materials for use in the U.S.A.

and Canada. In Canada construct all combustion-air and vent pipes

for this unit of CSA or ULC listed schedule-40 PVC, PVC-DWV

or ABS-DWV pipe and pipe cement. SDR pipe is NOT approved

in Canada.

See Table 7 for maximum pipe lengths and Fig. 36, 37, 38, 39, and

40 for exterior piping arrangements.

NOTE: Furnace combustion-air and vent pipe connections are

sized for 2-in. pipe. Any pipe size change should be made outside

furnace casing in vertical pipe. (See Fig. 32.) This allows proper

drainage of vent condensate.

Combustion-air and vent pipes must terminate together in same

atmospheric pressure zone, either through roof or sidewall (roof

termination preferred), using accessory termination kit.

See Table 5 for required clearances.

Furnace combustion-air and vent pipe connections must be at-

tached as shown in Fig. 33. Combustion-air intake plug fitting and

inducer housing alternate vent cap may need to be relocated in

some applications.

NOTE: Slope combustion-air and vent pipes a minimum of 1/4

in. per linear ft with no sags between hangers.

Fig. 32—Combustion-Air and Vent Pipe Diameter

Transition Location and Elbow Configuration

A93034

FURNACE

PIPE DIAMETER

TRANSITION IN

VERTICAL SECTION

NOT IN

HORIZONTAL

SECTION

Fig. 33—Combustion-Air and Vent Pipe Connections

A96187

COMBUSTION-

AIR

COMBUSTION-

AIR

FLOW

VENT

AIR

FLOW

AIR

FLOW

AIR

FLOW

UPFLOW DOWNFLOW

HORIZONTAL-LEFT DISCHARGE HORIZONTAL-RIGHT DISCHARGE

Select 1 vent pipe connection and

1 combustion-air pipe connection.

COMBUSTION-

AIR

COMBUSTION-

AIR

COMBUSTION-

AIR

COMBUSTION-

AIR

VENT

NOTE: Select 1 vent pipe connection and

1 combustion-air pipe connection.

NOTE:

—24—