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Resumen del manual
Avoid locations where the thermostat would be exposed to cold air infiltration, drafts from windows, doors, or other openings leading to the outside, or exposure to air currents from warm or cold air registers; or to exposure where the natural circulation of the air is cut off—such as behind doors, above or below mantels, shelves, etc. The thermostat should not be exposed to heat from nearby radiators, fireplaces, radios, televisions, lamps, or rays from the sun. Nor should the thermostat be mounted on a wall containing pipes or warm air ducts, or a flue or vent that could affect its operation and prevent it from properly controlling the room temperature. Any hole in the plaster or panel through which the wires pass from the thermostat should be adequately sealed with suitable material to prevent drafts from affecting the thermostat. TO HEATING AND TO CONDENSER COOLING CONNECTIONS LOW VOLTAGE LEAD OF THERMOSTAT OR TERMINAL STRIP NOTE: WIRE WITH * IN FIGURE 3 IS REMOVED AND DISCARDED WHEN CONDENSER HAS TRANSFORMER. A73118 Figure 4 - Control Box, Cover Removed, Showing Internal Wiring Changes Set the thermostat heat anticipator as follows: Units with Bryant A-641 or A-643 gas valve set at 0.5. Units with Robertshaw 7000 gas valve, set at 0.3 (except 175,000- and 200,000-Btuh belt-drive units, set at 0.2.) If additional controls are connected in the thermostat circuit, the amp draw must be added to these settings. Failure to make the settings will result in improper operation of the thermostat. ELECTRICAL CONNECTIONS Low-Voltage Wiring Field low-voltage connections are made at the low-voltage terminal strip. See Figure 3. For Model 394 Furnaces used in conjunction with electric or gas air conditioning units that do not have an integral transformer, see Figure 3. If the 394 Furnace is used in conjunction with an electric or gas air conditioning unit having an integral transformer, see Figure 4. Figure 4 shows a field-installed wire running from one side of the air conditioning transformer, through the hole marked “F” in the terminal strip, to the blower relay in the control box for the Model 394 Furnace. The wire marked * in Figure 3 is removed from the control box and discarded. NOTE: For heating only connections. See Figure 8. -3- Line-Voltage Wiring All electrical connections are to be made in accordance with the local electrical codes. A permanent, live, separately fused electric power supply, complete with manual switch, should be provided for the furnace. Field wiring connections should be made in accordance with the unit wiring diagrams. When making aluminum conductor connections to copper conductors or terminals, use only connectors that are UL approved (marked Al/Cu with the UL symbol) for the application and wire size. Do not reduce wire size to fit connector by cutting off strands. Use proper size connector. After insulation has been stripped from the aluminum conductor, coat the conductor end with corrosion inhibitor (Burndy “Penetrox A” or equivalent), and wire-brush the aluminum surface thru the inhibitor. C'M'TION- l)n ri'it \mii Inn h i ■•uni i I'n - mil 1 n_~ After cleaning, recoat the aluminum conductor with inhibitor, and make connection, then coat entire connection. If applicable, wrap the connection for moisture and/or electrical protection. Filters The filters are factory-installed in the bottom of the furnace. This is for bottom inlet application. See Figure 5. A73115 Figure 5 - Filter Installed For Bottom Inlet For side inlet application, see Figure 2 and Table I for the opening size. Remove the filter and the retainer spring from the bottom opening. Install the retainer spring in the holes provided, one in the blower deck and the other in the retainer spring bracket. See Figure 6. CAI'TION: U( -uu iIn lilii i hi mm '■piiiu i-lit'llintl Ilk ll 111"« llu < i-.nu -i*I* f When the side inlet is used, the bottom opening should be properly and permanently sealed. NOTE: Side inlet application of the following units requires use of the appropriate optional external filter rack: 048100, 060125, 060150, 060175, and 060200. See instruction packed with filter rack for installation. Figure 6 - Filter Installed For Side Inlet NOTE: Some units with direct-drive blowers have a shipping bracket. See Figure 5. This bracket should be removed and discarded. Belt-drive units have wood shipping blocks that are to be removed and discarded. START-UP AND ADJUSTMENT In addition to the following information, refer to “Procedures for Gas Furnace Installation” packaged with the unit. Adjustment of Blower Speed Four-Speed Direct Drive To change motor speed taps, remove the motor tap lead (see Figure 5) and relocate it on the desired terminal on the plug-in terminal block/speed selector-located on the blower. Table III—SPEED SELECTOR Wire/Speed Tap No. White/Common C Black/Hi 1 Blue/Med-Hi 2 Yellow/Med-Lo 3 Red/Lo 4 Belt Drive The blower speed may be changed by opening or...