HTP EL-399NVWH - Manual (Page 14)

14
LP- 346 REV. 3.20.14
You must also install air intake piping from outdoors to the heater flue adaptor. The resultant installation is categorized as direct vent
(sealed combustion). Note: To prevent combustion air contamination, see Table 1 in this section when considering exhaust vent and
intake pipe termination.
Exhaust and intake must terminate near each other and may be vented vertically through the roof or out a side wall. Exhaust vent and
intake piping methods are detailed in the Venting Section. Do not attempt installation using any other means. Be sure to locate the
heater so exhaust vent and intake piping can be routed through the building and properly terminated. The exhaust vent and intake
piping lengths, routing and termination method must all comply with methods and limits given in the venting section.
F. PREVENT COMBUSTION AIR CONTAMINATION
Install intake piping for the heater as described in the Venting section. Do not terminate exhaust vent in locations that can allow
contamination of intake air.
Ensure that the intake air will not contain any of the contaminants below. For example, do not pipe intake near a swimming pool. Avoid
areas subject to exhaust fumes from laundry facilities. These areas always contain contaminants. Contaminated air will damage the
heater, resulting in possible substantial property damage, severe personal injury, or death.
PRODUCTS TO AVOID
AREAS LIKELY TO HAVE CONTAMINANTS
Spray cans containing fluorocarbons Dry cleaning/laundry areas and establishments
Permanent wave solutions Swimming pools
Chlorinated waxes/cleaners Metal fabrication plants
Chlorine-based swimming pool chemicals Beauty shops
Calcium chloride used for thawing Refrigeration repair shops
Sodium chloride used for water softening Photo processing plants
Refrigerant leaks Auto body shops
Paint or varnish removers Plastic manufacturing plants
Hydrochloric or Muriatic acid Furniture refinishing areas and establishments
Cements and glues New building construction
Antistatic fabric softeners used in clothes dryers Remodeling areas
Chlorine-type bleaches, laundry detergents, and cleaning solvents Garages and workshops
Adhesives used to fasten building products
Table 1
NOTE: DAMAGE TO THE HEATER CAUSED BY EXPOSURE TO CORROSIVE VAPORS IS NOT COVERED BY WARRANTY.
(Refer to the limited warranty for complete terms and conditions).
G. REMOVING A HEATER FROM A COMMON VENT SYSTEM
When removing an existing heater, the following steps must be followed.
1. Seal any unused openings in the common venting system.
2. Visually inspect the venting system for proper size and horizontal pitch to
determine if there is blockage, leakage, corrosion or other deficiencies that could
cause an unsafe condition.
3. If practical, close all building doors, windows and all doors between the common
venting system and other spaces in the building. Turn on clothes dryers and any
appliances not connected to the common venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, at
maximum speed. Do not operate a summer exhaust fan. Close all fireplace dampers.
Do not install the heater into a common vent with any other appliance. This will
cause flue gas spillage or appliance malfunction, resulting in possible substantial
property damage, severe personal injury, or death.
Failure to follow all instructions can result in flue gas spillage and carbon
monoxide emissions, causing severe personal injury or death.
Figure 5 - CO Warning Label