Instruction/ maintenance manual of the product 90N75A Louisville Tin and Stove
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Gas-Fir ed V ented FLOOR FURNACE INST ALLA TION AND OPERA TING INSTRUCTIONS P/N 74521 REV . 08/97 MODEL NUMBERS MILLIVOL T CONTROL SYSTEM NA TURAL GAS 90N30A 90N50A 90N65A 90N75A W ARNING: If the information in this manual is not followed exactly , a fir e or explosion may result causing pr operty damage, personal injury or loss of life.
Hourly BTU Input 30,000 50,000 62,000 75,000 W idth and Length 14”x32” 22”x32” 24”x38” 26”x42” Overall Height 29-1/4” 29-1/4” 29-7/8” 30-7/8” Overall Grille Size 16”x34- c .
HELPFUL INST ALLA TION INFORMA TION Do not attempt to heat through more than one doorway in any direction to adjoining rooms. Always over-estimate the amount of heat required rather than under-estimate it. Always use the next size floor furnace above your actual heating requirements.
FRESH AIR FOR COMBUSTION AND VENTING Adequate air for combustion and venting must be provided. Any reduction in the necessary amount of fresh air can result in an oxygen starved flame that emits Carbon Monoxide (C.O.) an odorless, colorless gas that can cause serious injur y or death.
CUTTING THE FLOOR OPENING Consult the specification chart on Page 2 for the correct floor opening size for the floor furnace to be installed. Lay out th e opening size on the floor by using masking tape or cutting a piece of cardboard to the opening size.
INST ALLING THE DRAFT HOOD The draft hood must be installed in the same atmospheric pressure zone as the combustion air inlet. The draft hood is packed in its own carton within the master pack. Make sure the draft hood received is the correct one for the floor furnace being installed.
1/4” SAFE UNSAFE RECOMMENDED FIGURE 7A FIGURE 7B FIGURE 7C CONNECTING THE VENT - Continued If the floor furnace is vented into a masonry chimney , the chimney must be inspected to determine that it is clear and free of obstructions and that it is safe for the intended use.
If more than one gas appliance is vented through a common vent system, the vent should be increased in size to accommodate the increased load. Consult your local code or the tables in the latest edition of NFP A54/ANSI.
Refer to Figure 11 for the basic fittings you will need at the furnace. 1 . Use black iron or steel pipe and fittings or other pipe and fittings that are approved by local codes. 2 . Use pipe joint compound that is resistant to the action of Liquefied Petroleum (L.
When you have determined that there are no leaks in the gas piping system you may purge the system of air . Disconnect the pilot supply tubing from the right side of the valve. See Figure 12. Turn the knob on the gas valve to the pilot position. Press the knob down and hold until you smell gas at the pilot supply opening.
FOR YOUR SAFETY READ BEFORE LIGHTING A. This appliance has a pilot which must be lighted by hand. When lighting the pilot, follow these instruc- tions exactly . B . BEFORE LIGHTING smell all around the appliance area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor .
VENT SYSTEM After the floor furnace has been burning for five minutes, hold a match or candle under the draft hood at the air intake area. If the vent system is working properly , the flame will be pulled into the air inlet of the draft hood.
ADJUSTING THE BURNER – Continued If difficulty in adjusting the burner is experienced, it may be the result of incorrect gas supply pressure or manifold pressure. Pressure can only be checked and adjusted by a trained service technician using instruments designed for that purpose.
MAINTENANCE INSTRUCTIONS CAUTION: Label all wires prior to disconnection when servicing controls. W iring errors can cause improper and dangerous operation.
TROUBLE SHOOTING CHAR T - AUTOMA TIC PILOT & V AL VE TROUBLE SHOOTING CHAR T - MAIN BURNER SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION Flame too large 1. Defective operator section of gas valve. 1. Replace complete valve. 2. Burner orifice too large.
MODELS INCLUDED: 90N30A NA T . 90N50A NA T . 90N65A NA T . 90N75A NA T . GAS FLOOR FURNACE LIST PRICES Prices and specifications subject to change witout notice.
MODEL NUMBER NA T . 90N30A 90N50A 90N65A 90N75A R E F . P ART LIST P ART LIST P A R T LIST P A RT LIST P AR T DESCRIPTION N O . N O . PRICE N O . PRICE N O . PRICE N O . PRICE Heat Exchanger w/Gasket 1 23074 $206.20 2 40 9 9 $291.10 24499 $331.90 24 6 9 9 $370.
IMPOR T ANT SAFETY BULLETIN ON YOUR GAS CONTROL AND PILOT LIGHT SYSTEM FOR HEA TING EQUIPMENT WHA T YOU DON’T KNOW CAN HUR T YOU. Y our pilot light system has been designed for safe and reliable operation. Although safety mechanisms are built-in, the potential for hazard exists.
LIMITED WARRANTY LIMITED WARRANTY LIMITED WARRANTY LIMITED WARRANTY LIMITED WARRANTY The Louisville Tin & Stove Co. warrants to the original user the accompanying product for the period specified .
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