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SD DOWNFLOW DUCTED PACKAGED TERMINAL AIR CONDITIONERS

Heating and Cooling Unit

Cooling - Only Unit

INSTALLATION & OPERATION MANUAL

Effective February 1985 (Revision Date: April 2009)
This manual supersedes all previous issues.

801108 REV. 01 APR 2009

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Summary of Contents for SD

Page 1: ...ACKAGED TERMINAL AIR CONDITIONERS Heating and Cooling Unit Cooling Only Unit INSTALLATION OPERATION MANUAL Effective February 1985 Revision Date April 2009 This manual supersedes all previous issues 801108 REV 01 APR 2009 ...

Page 2: ...es 9 If The Unit Doesn t Work 9 PREVENTIVE MAINTENANCE 9 Before Each Heating and Cooling Season 9 WARNING SAFETY HAZARD THE SD SERIES UNITS MUST BE USED FOR DUCTED APPLICATIONS ONLY FREE AIR DISCHARGE APPLICATIONS REQUIRE THE SU SERIES WHICH IS A SPECIALLY CONFIGURED UNIT SIMILAR IN APPEARANCE BUT WHICH INCORPORATES A DISCHARGE GRILLE AND OTHER SAFETY FEATURES REQUIRED FOR FREE AIR DISCHARGE APPLI...

Page 3: ...r plate is supplied with the sub base 4 Plenum Vertical Ducts The plenum is a horizontal duct that attaches by screws to the top panel of the chassis once the chassis is fully inserted and drawn up tightly in the wall sleeve The plenum collects the air as it exits from the top of the chassis and turns the air in a right hand and left hand direction When the air reaches the ends of the plenum it is...

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Page 6: ...ting exceeds 30 0 Amps then a NEMA 6 50R receptacle must be used The cover plate is supplied with the sub base 9 Plenum Vertical Ducts The plenum is a horizontal duct that attaches by screws to the top panel of the chassis once the chassis is fully inserted and drawn up tightly in the wall sleeve The plenum collects the air as it exits from the top of the chassis and turns the air in a right hand ...

Page 7: ...installation Electrical entrance must be between the concrete wall sleeve and sub base Detailed instructions follow A New Masonry Wall 1 From the architect s drawings determine the position of each unit and mark the centerline of the cabinet wall sleeve Also mark the location of the high voltage receptacle enclosure and the area of entrance for the low voltage wiring Low voltage wiring exits throu...

Page 8: ... Position the chassis in the cabinet and slide into place Keep the chassis level and square to prevent binding The chassis must be pushed into the cabinet until the draw bolts screws in the chassis side panels can engage the threaded clip in the sleeve Alternate turning the two draw bolts until the chassis is drawn snugly into the sleeve Do not over tighten the draw bolts NOTE When handling the ch...

Page 9: ...rt No 18BK23Y 024 Heating and cooling will be cycled on as dictated by the setting of the wall thermostat In this mode the room side fan will run at factory predetermined speeds for heating and cooling IMPORTANT The factory set indoor fan speeds must not be changed The product safety certification relies on fan speeds being coordinated with specific heater sizes The indoor fan will be off when nei...

Page 10: ...ged 4 If unit is calling for cooling check to see if outside condenser fan is running 5 Is cooling being demanded at a very low outdoor temperature The unit is designed to discontinue cooling operation at low outdoor temperatures where air conditioning is not typically required If after checking the above your unit is still not operating call in competent service personnel ATTENTION When in coolin...

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