Clayton 1600EF, Installation & Operator'S Manual

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IMPORTANCE OF PROPER DRAFT
Draft is the force which moves air from the appliance up through the chimney. The amount of draft in your
chimney depends on the length of the chimney, local geography, nearby obstructions and other factors. Too
much draft may cause excessive temperatures in the appliance. Inadequate draft may cause backpuffing into
the room and ‘plugging’ of the chimney. Inadequate draft will cause the appliance to leak smoke into the room
through appliance and chimney connector joints. An uncontrollable burn or excessive temperature indicates
excessive draft. Take into account the chimney’s location to insure it is not too close to neighbors or in a valley
which may cause unhealthy or nuisance conditions.
CONNECTING HOT AIR DUCT TO FURNACE
We strongly recommend that the hot air duct work be installed by a home heating specialist. If doing the
installation yourself, before you decide which installation will best suit your needs, consult a qualified heating
technician and follow his recommendations as to the safest and most efficient method of installation.
The warm-air supply-duct system shall be constructed of metal in accordance with NFPA 90B, 2-1.1. The plenums
installed to the furnace be constructed of metal in accordance with NFPA 90B, 2-1.3.
Outside the house you must use 10 inch galvanized pipe, wrapped with weather proof, UV resistant insulation.
The 12 inch return may be galvanized pipe and attached to the home so as to not pressurize the home.
NEVER reduce the 10” hot air or the 12” return air as this will result in restricted air flow and cause the furnace to
not operate properly.
NEVER draw cold outside air into the blower housing. By doing so, the furnace’s heat chamber will not reach the
necessary temperature to heat the home.
The duct work should be designed so the external static pressure does not exceed 0.2 inches water column while
developing air velocities of 600 to 1,000 feet per minute in the main trunk duct and 400 to 600 feet per minute at
the registers. The heat outlet should never be less than ten inches (10”) round or 79 square inches.
This furnace must be installed with a cold air return system. The system must be a minimum of twelve inches
(12”) to readily transfer the cold air from the home back to the furnace. If desired, a cold air filter box may be
constructed with a minimum opening of 225 square inches.
The warm-air supply outlet of the outdoor furnace must not be connected to the cold-air-return inlet of an
existing central furnace because the possibility exist of components of the existing furnace overheating and may
cause the central furnace to operate other than intended.
ATTENTION:
This heater needs periodic inspection and repair for proper operation. It is against federal regulations to
operate this heater in a manner inconsistent with operating instructions in this manual.