Bard WG241 Installation Instructions Manual

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Bard WG241 Installation Instructions Manual Manual pdf 37 page image

Manual 2100-365KPage 3432. INDOOR BLOWER OPERATIONAll models have multiple speed direct drive blowermotors. If supply and return ducts are connected to theunit, the ducts must be of adequate size. Refer to theappropriate blower tables. See Tables 10, 11, 12, 13,14 and 15 for maximum static pressures acceptable.Note the minimum CFM for cooling operation.If voltage and duct design permit, (see blower tables)single speed operation can be achieved as follows:230 VOLT BLOWER MOTOR SPEED CHANGE1. Disconnect main power supply to unit.2. Remove and tape off the unwanted indoor motorspeed tap from the heat or cool terminal on thefurnace control board.3. Next install a jumper wire with multiplier betweenheat and cool terminal and attach desired blowermotor speed to other side of multiplier.4. Energize the system in cooling and heating modesand check for proper blower operation.460 VOLT BLOWER MOTOR SPEED CHANGEField changeover from the factory blower motor speedsettings can require change several different motorleads, the addition or deletion of a wire.Refer to blower motor wiring options as shown belowfor the correct wiring of the blower motor for theapplication involved.TABLE 9MOTOR SPEED TAPSsdeepS rotoMdeepS3woL deRmuideM eulBhgiH kcalBMIS-1482FIGURE 18FURNACE CONTROL BOARD AND BLOWER CONTROLATTACH JUMPERWIRE HERE FORSINGLE SPEEDOPERATIONFURNACE CONTROLBOARD