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A chimney without a clay tile liner, which is otherwise in good condition, shall be rebuilt to conform to ANSI/NFPA 211 or be lined with a UL listed (ULC listed in Canada) metal liner or UL listed
If a metal liner or
APPLIANCE APPLICATION REQUIREMENTS
Appliance operation has a significant impact on the performance of the venting system. If the appliances are sized, installed, adjusted, and operated properly, the venting system and/or the appliances should not suffer from condensation and corrosion. The venting system and all appliances shall be installed in accordance with applicable listings, standards, and codes.
The furnace should be sized to provide 100 percent of the design heating load requirement plus any margin that occurs because of furnace model size capacity increments. Heating load estimates can be made using approved methods available from Air Condi- tioning Contractors of America (Manual J); American Society of Heating, Refrigerating, and
When a metal vent or metal liner is used, the vent must be in good condition and be installed in accordance with the vent manufac- turer’s instructions.
To prevent condensation in the furnace and vent system, the following precautions must be observed:
1.The
2.Adjust the gas input rate per the installation instructions. Low gas input rate causes low vent gas temperatures, causing condensation and corrosion in the furnace and/or venting system. Derating is permitted only for altitudes above 2000 ft.
3.Adjust the air temperature rise range to the midpoint or slightly above. Low air temperature rise can cause low vent gas temperature and potential for condensation problems.
4.Set the thermostat heat anticipator or cycle rate to reduce short cycling.
Air for combustion must not be contaminated by halogen com- pounds which include chlorides, fluorides, bromides, and iodides. These compounds are found in many common home products such as detergent, paint, glue, aerosol spray, bleach, cleaning solvent, salt, and air freshener, and can cause corrosion of furnaces and vents. Avoid using such products in the
Vent dampers on any appliance connected to the common vent can cause condensation and corrosion in the venting system. Do not use vent dampers on appliances common vented with this furnace.
ADDITIONAL VENTING REQUIREMENTS
A 4″ round vent elbow is supplied with the furnace. A 5 inch or 6 inch vent connector may be required for some model furnaces. A
NOTE: Vent connector length for connector sizing starts at furnace vent elbow. The 4 inch vent elbow is shipped for upflow configuration and may be rotated for other positions. Remove the 3 screws that secure vent elbow to furnace, rotate furnace vent elbow to position desired,
The vent connector can exit the door through one of 5 locations on the door.
1.Attach the single wall vent connector to the furnace vent elbow, and fasten the vent connector to the vent elbow with at least two
2.Vent the furnace with the appropriate connector as shown in Fig.
Personal injury can result form sharp metal edges, etc. Be careful when removing parts. Gloves and safety glasses should be worn when servicing equipment.
3.Orient the door to determine the correct location of the door cutout to be removed.
4.Use
An accessory Vent Guard Kit, KGAVG0101DFG is REQUIRED for downflow applications for use where the vent exits through the lower portion of the furnace casing door. Refer to the Vent Guard Kit Instructions for complete details.
The horizontal portion of the venting system shall maintain a minimum of
SIDEWALL VENTING
This furnace is not approved for direct sidewall horizontal venting without the use of an
In the U.S.: Per the NFGC, any listed power venter may be used, when approved by the authority having jurisdiction.
In Canada: Only power venters approved by the appliance manufacturer and where allowed by the authority having jurisdic- tion may be used for sidewall venting.
The only approved power venter is the Field Controls
START-UP, ADJUSTMENT, AND SAFETY CHECK
Step 1—General
This furnace is equipped with manual reset limit switches in the gas control area. The switches open and shut off power to the gas valve if a flame rollout or overheating condition occurs in the gas control area. DO NOT bypass the switches. Correct inadequate combustion air supply problem and reset the switches. Failure to follow this warning can cause fire, explosion, personal injury, or death.
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