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

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Carrier 42D Series Installation, Start-up And Service Instructions Manual Manual pdf 40 page image

40INSTALLATIONStep 1 — Place Units in Position42C UNITS1. Select the unit location. Allow adequate space for free aircirculation, service clearances, piping and electricalconnections, and any necessary ductwork. For specificunit dimensions, refer to Fig. 1-14. Allow clearances ac-cording to local and national electric codes.2. Make sure ceiling is able to support the weight of the unit.See Table 1 for nominal unit weight.3. Ensure bottom panel has been removed from 42CG, CKunits with mounting holes. When unit is lifted, access tothe 0.375-in. mounting holes is through the bottom of theunit. Hanger rods and fasteners and other required hard-ware must be field-supplied.4. Move unit into position. Ensure unit is level or pitchedtowards drain to ensure proper drainage and operation.Pitch of suspended unit can change after coil is filled;recheck after filling coil.5. Mounting unit:a. Use rods and fasteners to suspend the unit at thefactory-provided mounting holes with rubbergrommets on the top of the unit on 42CG, CKunits. Reach into unit and attach unit to the ceilingusing the 0.375-in. mounting holes (4) in toppanel; do not use any other locations.b. Use rods and fasteners to suspend the unit at thefactory-provided 0.375-in. hanger slots (4) withrubber grommets on the top of the unit on the42CA, CE, and CF units.NOTE: The four mounting holes and hanger slotswith rubber grommets are NOT for balancing unit.6. 42CA and 42CF units without plenums and 42CE and CFwith bottom inlet may be installed in noncombustibleareas only.NOTE: The installation of horizontal concealed units mustmeet the requirements of the National Fire Protection Associa-tion (NFPA) Standard 90A or 90B concerning the use of con-cealed ceiling space as return-air plenums.42V UNITS1. Select the unit location. Allow adequate space for free aircirculation, service clearances, piping and electricalconnections, and any necessary ductwork. For specificunit dimensions, refer to the submittals. Allow clearancesaccording to local and national electric codes.2. Make sure the floor is able to support the weight of theunit. See Table 2 for nominal unit weight.3. Ensure wall behind unit is smooth and plumb; ifnecessary, install furring strips on walls with irregularsurfaces or mullions. Furring strips must be positionedbehind mounting holes in unit (42VA, VB, VF units).Fasteners, furring strips, and other seals (if required) mustbe field-supplied.4. Remove all wall and floor moldings from behind the unit.5. Ensure 42VA top panel (under window application) and42VB, VF front panel has been removed from unit toobtain access to the four 0.75-in. mounting holes. Hangerrods and fasteners and other required hardware must befield-supplied.6. Move unit into position. Ensure unit is level or pitchedtowards drain to ensure proper drainage and operation.Pitch of suspended unit can change after coil is filled;recheck after filling coil.7. Adjust 42VA, VB, VC, VE, VF units leveling legs so unitis level. Unit must be level for proper operation andcondensate drainage.8. Mounting unit:a. Use rods and fasteners to suspend the unit at thefactory-provided mounting holes with rubbergrommets on the top of the unit on 42VA, VB, VFunits. Reach into unit and attach unit to the wallusing the 0.375-in. mounting holes (4) in toppanel; do not use any other locations. The fourmounting holes and hanger slots with rubbergrommets are NOT for balancing unit.b. On 42VG unit ensure unit is placed snug withinthe wall.c. On 42VC, VE unit ensure unit is flushed againstthe wall.NOTE: For any unit without a return-air duct connection,applicable installation codes may limit unit to installation insingle story residence only.42D UNITS1. Select the unit location. Allow adequate space for free aircirculation, service clearances, piping and electrical con-nections, and any necessary ductwork. For specific unitdimensions, refer to the submittal drawings. Allow clear-ances according to the local and national electrical codes.2. Be sure either the ceiling (42DA, DC, DE, and DF units)or floor (42DD unit) is able to support the weight of theunit. See Table 3 for nominal unit weight.3. Move unit into position. Ensure unit is level or pitchedtowards drain to ensure proper drainage and operation.See Fig. 23-27. Pitch of suspended unit can change aftercoil is filled; recheck after filling coil.4. Mounting units to the ceiling:a. When unit is lifted, access to the 0.375-in. mount-ing holes is on the top panel of the unit. Hangerrods and fasteners and other required hardwaremust be field-supplied.b. Use rods and fasteners to suspend the unit at thefactory-provided mounting holes with rubbergrommets on the top of the unit. Attach unit to theceiling using the 0.375-in mounting holes (4) intop panel; do not use any other locations.c. Use the rods and fasteners to suspend the unit atthe factory-provided 0.375-in. hanger slots (4)with the rubber grommets on the top of the unit onthe 42DA, DC, DE, and DF units.NOTE: The four mounting holes and hanger slotswith rubber grommets are NOT for balancing unit.d. Models 42DA and 42DC with bottom inlet may beinstalled in noncombustible return spaces only.5. Mounting units on the floor:a. Ensure wall behind the unit is smooth and plumb;if necessary, install furring strips on walls withirregular surfaces or mullions. Furring strips mustbe positioned behind mounting holes on 42DDunits. Fasteners, furring strips, and other seals (ifrequired) must be field-supplied.b. If the unit has leveling legs, adjust them correctlyto level the unit.6. Protect units from damage caused by jobsite debris. Donot allow foreign material to fall in unit drain pan.Prevent dust and debris from being deposited on motor orfan wheels.