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installation <br /> WIRING GENERAL ATTACHMENT OF FIELD INSTALLED DUCTWORK, <br /> CAUTION BLOWER BA MODELS ONLY <br /> Disconnect power supply before making wiring connec- CAUTION <br /> tions to prevent electrical shock and equipment damage. Do not attempt to attach ductwork of any kind to propeller <br /> ALL UNITS MUST BE WIRED STRICTLY IN ACCOR- PA/PAE models. <br /> DANCE WITH WIRING DIAGRAM FURNISHED WITH <br /> UNIT. Burned-out heat exchanger,or definitely shorter equipment <br /> ANY WIRING DIFFERENT FROM WIRING DIAGRAM life,will result from not providing uniform air distribution. <br /> MAY BE HAZARDOUS TO PERSONS AND PROPERTY. Insufficient air, or poor air distribution across the heat <br /> Any damage to or failure of Modine units caused by incor- exchanger will cause early failure of the blower unit heater. <br /> rect wiring of the units is not covered by MODINE'S When installing heater,always follow good ductdesign prac- <br /> STANDARD WARRANTY(see Back Cover). ticesforeven distribution oftheairacrosstheheatexchanger. <br /> Recommended layouts are shown below. When installing <br /> All field installed wiring must be done in accordance with the blower units with ductwork,the following must be done. <br /> National Electrical Code ANSI/NFPA 70—Latest Edition or 1. Provide uniform air distribution over the heat exchanger. <br /> Canadian Electrical Code CSA C22.1 Part 1 or local codes. Use turning vanes where required.See figures below. <br /> Unit must be electrically grounded according to these codes. 2. Provide removable access panels in the ductwork on the <br /> See wiring diagram shipped with unit. For optional wiring downstream side of the unit heater. These openings <br /> diagrams see Bulletin 6-430. should be large enough to view smoke or reflect light <br /> The power to these unit heaters should be protected with a inside the casing to indicate leaks in the heat exchanger <br /> fused disconnect. Units for use with three-phase electric and to check for hot spots on exchanger due to poor air <br /> power must be provided with a motor starter having properly distribution or lack of sufficient air(cfm). <br /> sized overload protection. 3. If ductwork is connected to the rear of the unit,use Modine <br /> Location of thermostat should be determined by heating blower enclosure kit,or if using field designed enclosure, <br /> requirements and be mounted on an inside wall about 5' maintain dimensions of proper blowerenclosure as shown <br /> above floor level ...where it will not be affected by heat from on page 13. <br /> the unit or other sources, or drafts from frequently opened <br /> doors.See instructions packed with thermostat. CAUTION <br /> INSTALLATION OF BLOWER MODELS(BA/BAE UNITS) Check for red heat exchanger tubes. If bottom of tubes <br /> CAUTION become red while blower unit is in operation, check for <br /> proper air volume and air distribution. Adjust blower <br /> Properair flow and distribution,across the heat exchanger speed or correct discharge duct design to correct problem. <br /> must be provided to prevent early failure of the blower unit <br /> heater. <br /> RECOMMENDED INSTALLATIONS Dimension"B"Should Never <br /> B Be Less than 1/2 of"A" <br /> A 3"MAX. C <br /> TURNING 12" <br /> VANES MIN. <br /> B ,11 3"MIN. 12" <br /> 3"MIN. B MIN. <br /> 12" <br /> A3" JX <br /> TURNINGVANESBAFFLE <br /> 12"MIN. <br /> SIDE VIEW SIDE VIEW TOP VIEW <br /> D E F <br /> 12 <br /> MIN. 12" <br /> B r—MIN <br /> \\ Q <br /> \ ET'� <br /> B 9P <br /> �BAFFLE <br /> ® TURNING \\ AVANES <br /> TURNING BAFFLE VANES <br /> SIDE VIEW SIDE VIEW TOP VIEW <br /> Page 6 <br />