Bryant 905D User's Manual
Contents
1. Multi Speed Motor A69057 Figure 7 Wiring for 230 Volt installation 690572. valve to permit water to fl w into humidifier pan Make sure all connections are tight and there are no water leaks Check drain plug if necessary tighten plug by turning handle clockwise Allow humidifier pan to fill As water approaches top of overflow tube make sure float valve closes stopping water flow 1 2 to 3 4 inch below top of overflow Plug humidifier motor cord into service cord Start heating unit When heating unit blower starts look through sight glass to see if disc assembly is rotating If humidistat is used circuit must be made through it Stop heating unit When blower stops look through sight glass to be sure disc assembly stops If installation includes cooling start cooling unit When blower motor of heating unit starts look through sight glass to be sure disc assembly is NOT rotating Leave these instructions with homeowner VI MAINTENANCE Each spring the humidifier pan should be removed and cleaned L 2 3 Disconnect humidifier service cord Turn off water supply to humidifier Hold bucket under humidifier pan remove drain plug and empty water from humidifier into bucket approximately 2 gallons Disconnect water supply line from humidifier Turn latches 1 4 turn and remove humidifier Remove disc assembly by lifting end of shaft op posite motor and pulling away from motor at same time Replace disc assembly when space between discs is less than 1 4 inch and soli
3. Installation Instructions POWER HUMIDIFIER INTRODUCTION The Bryant Model 905D Duct Humidifier is shipped complete and ready for mounting to the supply air duct of the heating unit The humidifier is connected electrically to the heating unit blower circuit and operates only when the blower is running on heating cycles The water supply connects to the float valve assembly mounted in the upper front corner of the humidifier pan The waterflow is automatically con trolled by the float We recommend the use of a humidistat with the Model 905D because of its high humidification capacity The Bryant Humidifier includes the Bilsetaw Disc assembly Drive motor Water pan Water valve and float assembly Sight window Drain plug Paper template Parts bag containing power supply cord latches mounting bracket and saddle valve assembly IMPORTANT Read before installing 1 Check local codes and ordinances for requirements 2 Check power supply to be sure it gorrean to that specified on the rating plate 115 60 1 Installation of the Model 905D Humidifier comprises the following steps sections I Locating the Unit II Mounting the Unit III Connecting Water Supply IV Connecting Electrical Supply V Start up and Adjustment VI Service and Maintenance LOCATING THE UNIT The unit should be located on a supply air duct having a minimum width of 12 inches For best operation locate unit where air is evenly d
4. ds cannot be easily removed When discs are plugged airflow is not necessarily reduced only when the space between the discs is clogged enough to restrict airflow Clean humidifier pan before reassembling Reverse procedure outlined in Steps 1 6 for reassembling However if installation includes cooling do not turn on water supply to humidifier Step 2 until start of heating season NOTE During the heating season humidifier pan should be drained and flushed once a month A73217 Figure 3 Installing Humidifier if 115V TO FURNACE sr POW TRANSFORMER Aii FAN CONTROL HUMIDIFIER MOTOR IF HUMIDISTAT IS USED CONNECT IN THIS LINE FAN MOTOR A67120 HUMIDIFIER WIRING FOR SINGLE SPEED HEAT COOL INSTALLATION 115V TO FURNACE 115V TRANSFORMER POWER SUPPLY HEAT FAN CONTROL HUMIDIFIER MOTOR SPDT IF HUMIDISTAT IS COOLING USED CONNECT IN FAN RELAY THIS LINE FAN MOTOR A67119 FURNACE TERMINAL BLOCK HUMIDIFIER IF HUMIDISTAT IS USED CONNECT IN THIS LINE 115V SPST RELAY GROUND ADD AMP DRAW OF RELAY TO THE THERMOSTAT SETTING FURNACE TERMINAL BLOCK IF HUMIDISTAT IS USED CONNECT IN THIS LINE HUMIDIFIER TRANSFORMER ADD AMP DRAW OF RELAY TO THE THERMOSTAT SETTING 4 ZN Figure 4 Heating Only 115 Volt eee Single Speed Motor Figure 5 Heating and Cooling 115 Volt Single Speed Motor Figure 6 Heating and Cooling 115 Volt
5. istributed in the duct The duct should be level within ae inch per foot at the point of installation NOTE The minimum size duct on which ihe humidifier can be mounted is 8 inches high by 12 inches wide Bryant s Model 905D Humidifier is designed for indoor installation only 905D Series D 39905D4 4 15 73 A73215 ae Figure 1 Model 905D Power Humidifier ll MOUNTING THE UNIT 1 Tape paper template to duct at desired location proceed to cut opening and drill holes per in structions printed on template 2 Install mounting bracket and latches See Figure 3 3 Slide humidifier pan rim one without foam tape into mounting bracket Lift unit into place and turn latches so they catch rim of humidifier 4 Check for air leaks Use stiffeners around duct opening to straighten duct if necessary CONNECTING WATER SUPPLY NOTE Unsoftened water is recommended 1 Tap off nearest cold water line with self piercing saddle valve provided Follow directions on packet for installing saddle valve 2 For connecting main water supply to humidifier pan use Bryant s optional tubing kit P N 65193DO1 instruction included in kit In a few cases because of local codes it may be necessary to use 1 4 inch copper tubing rather than plastic tube supplied in Bryant tubing kit Tubing line should be purged with water before connecting to float valve assembly 3 A drain line can be connected to 1 2 inch OD outle
6. t located in right hand corner of humidifier pan when facing humidifier motor Run line to an open drain FLOAT MOTOR HOUSING WATER INLET ms FOR g TUBE A73216 Figure 2 Dimensional Drawing Table Ratings and Performance Voltage Freq Phase Evaporative Rate _ Water Supply Line Overflow Drain Connection Performance amp Physical Data Plenum Cutout Dimensions MODEL Electrical fee oe 115 60 1 cae 2 Ibs hr 10 7 8 x 12 1 4 in tube Rated in accordance with A R I Standard 610 70 IV ELECTRICAL CONNECTIONS Make all electrical connections in accordance with National Electric Code and any local codes or or dinances that may apply If aluminum conductors are used the wire size selec ted must have a current carrying capacity not less than that of the copper wire specified and must not create a voltage drop between the service panel and the unit in excess of 2 of the unit rated voltage As a 2 minimum aluminum wire must be treated to prevent oxidation with electric power turned off Recheck all electrical connections both factory and field for tightness Be sure to check power supply connections especially if aluminum conductors are used Wire the service cord furnished in the parts bag in parallel with the heating unit fan motor as shown in the appropriate diagram See Figures 4 5 6 or 7 V START UP AND ADJUSTMENT i Open saddle
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