Carrier 42S Series Installation, Start-up And Service Instructions Manual

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Carrier 42S Series Installation, Start-up And Service Instructions Manual Manual pdf 16 page image

16water piping and valves are located over the drain panand need not be insulated.11. If required, fireproof where necessary. Any fireproofingrequirements where risers or piping penetrate floors orwalls are the responsibility of the installer. This workshould be done only after all pressure testing is com-pleted. The fireproofing method used must accommodatepipe expansion and contraction and the piping must beprotected from abrasion and chemical attack. The pipeinsulation also must be maintained to prevent sweatingand must be protected from wear or erosion at the jointbetween the insulation and the fireproofing material.42SU UNIVERSAL ARRANGEMENTThe unique design of the universal stack fan coil unit allowsfor field configuration for each unit. Air discharge, riser,drain, and outside air knockouts have been strategically locat-ed on each unit. Risers, shown with unit, are for reference on-ly. All risers are factory fabricated and shipped loose for fieldinstallation.It is important that you identify all of the unit feature loca-tions and which knockouts you intend to use before proceed-ing with the installation. See Fig. 15-19. Also, it must be de-termined whether your application requires a Mating Unit(primary/secondary) and its configuration. Consult your localsales representative or the factory for further details on pri-mary/secondary arrangements.Potential Universal Arrangement Unit ConfigurationsRisers: Three LocationsThe pre-installed supply, return, and drain risers (2-pipe or 4-pipe applications) can be oriented on any of three sides of theunit (see Fig. 15).Risers cannot be installed on the return air side of the cabinet.Fig. 15 — 42SU Unit ConfigurationUnit orientation is determined based on the location of therisers in the building. The riser side of the universal stack unitalways determines the rear of the unit. See Fig. 16.Fig. 16 — 42SU Unit OrientationReturn Air: Single LocationThe return air/access panel may then be oriented on the left,right, or front of the unit.Supply Air: Five Locations (4 sides and top)Includes stitched design for 1 /2-in. duct flanges.Outside Air: Two LocationsEither side adjacent to the return air opening.NOTE: Outside air opening may be used on a side if risers areconfigured on that same side.Supply, Return, and Drain Riser Installation1. Three sides of each universal stack unit have four supplyand return riser knockouts along the center and one drainknockout near the lower part of the unit (see Fig. 17).Identify whether your application uses a 2-pipe or 4-pipeconfiguration.a. Two-pipe configurations typically use the two innerriser knockouts.b. Four-pipe configurations will use all four riserknockouts.2. Locate and mark the riser and drain knockouts that applyto your particular unit application, ensuring proper orien-tation of the return air opening in room.3. Insert a flat head screw driver into knockout slot shownin Fig. 18.4. Pry screw driver back and forth until knockout tabs breakaway from the unit.5. Discard knockout. Be careful of sharp edges.6. Use a sharp retractable knife (see Fig. 19) and verticallycut the insulation down the center of the riser and drainknockouts the full length of the knockout.7. Use adhesive or glue to re-attach insulation that haspulled away from the unit during knockout removalprocess.42SUCABINETRETURN AIRHR CRDHS CSHR CRDHS CSHR CRDHS CSD CRHS CSHRR D SHR = HOT WATER RETURNHS = HOT WATER SUPPLYD = DRAINCR = COLD WATER RETURNCS = COLD WATER SUPPLYR = RETURND = DRAINS = SUPPLY2- or 4-PIPEREAR(RISER SIDE)42SUCABINET RIGHTFRONTLEFT