Carrier 42C,V Manual de instalación descargar pdf (Pagina 44)

42D UNITS

1. Select the unit location. Allow adequate space for free air

circulation, service clearances, piping and electrical con-

nections, and any necessary ductwork. For specific unit

dimensions, 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 the

unit. See Table 3 for nominal unit weight.

3. Move unit into position. Ensure unit is level or pitched

towards drain to ensure proper drainage and operation.

See Fig. 24-28. Pitch of suspended unit can change after

coil 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. Hanger

rods and fasteners and other required hardware

must be field-supplied.

b. Use rods and fasteners to suspend the unit at the

factory-provided mounting holes with rubber

grommets on the top of the unit. Attach unit to the

ceiling using the 0.375-in mounting holes (4) in

top panel; do not use any other locations.

c. Use the rods and fasteners to suspend the unit at

the factory-provided 0.375-in. hanger slots (4)

with the rubber grommets on the top of the unit on

the 42DA, DC, DE, and DF units.

NOTE: The four mounting holes and hanger slots

with rubber grommets are NOT for balancing unit.

d. Models 42DA and 42DC with bottom inlet may be

installed 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 with

irregular surfaces or mullions. Furring strips must

be positioned behind mounting holes on 42DD

units. Fasteners, furring strips, and other seals (if

required) must be field-supplied.

b. If the unit has leveling legs, adjust them correctly

to level the unit.

6. Protect units from damage caused by jobsite debris. Do

not allow foreign material to fall in unit drain pan.

Prevent dust and debris from being deposited on motor or

fan wheels.

42S UNITS — A factory tag is on top of each unit. Tag states

riser tier number, floor, room number if furnished and supply-

air arrangement. Check unit for any other labels that apply to

installation. Units should not be installed at locations other

than that marked on the unit identification tag. If no specific

detail is shown on tag for unit location then determine configu-

ration for the Universal unit based on information within this

manual. Should any questions arise regarding unit configura-

tion, contact the sales representative or the factory BEFORE

proceeding. Remove unit from pallet and take directly to

assigned space for installation. While all equipment is

designed and fabricated with sturdy materials and may present

a rugged appearance, great care must be taken to assure that no

force or pressure be applied to the coil, risers or piping during

handling. Never use the riser to lift the unit. To maintain the

straight and square cabinet alignment, avoid lifting or support-

ing the cabinet only at the top and bottom. For specific unit

dimensions refer to Fig. 29-33.

While the manufacturer does not become involved in the

design and selection of support methods and components, it

should be noted that unacceptable system operating character-

istics and/or performance may result from improper or inade-

quate unit structural support. Due to variations in building

construction, floor plans, and unit configurations, each installa-

tion is different. The actual step-by-step method of installation

may vary from unit to unit. However, the risers should be

moved as little as possible to avoid damage to the unit and in-

ternal components.

42SG, SH, and SJ Units

1. Begin on lowest floor and progress upward, floor by

floor, to top.

2. Examine drain line (Fig. 34 and 35). Be sure both ends

are in place and that it forms a trap. Avoid pinching drain

line.

3. Tip unit over riser hole in building floor. As unit is

righted, align riser with unit below.

NOTE: The unit must be lowered into the space taking

care to properly align the risers to engage the riser swaged

section on the unit below. The riser should never be bent

or pushed together to be passed through the floor slot and

should never be lifted up or pulled down to meet the riser

on the floor below or above.

4. Install isolator pads beneath the four corners of unit if

applicable.

5. Before anchoring the equipment in place, the unit must be

leveled and the cabinet must be squared and brought into

line with any adjacent or included walls. The unit may be

anchored in place by bolting directly through the unit

floor or attaching to the cabinet in some location that will

not interfere with drywall or other items such as the sup-

ply grille, thermostat, or return access panel. When at-

taching to the unit cabinet, care must be taken to not pen-

etrate the cabinet in locations that may damage internal

components or wiring. The mounting technique is a mat-

ter of choice; however, the unit should always be an-

chored securely to prevent movement during construction

and riser expansion and contraction. On certain units,

shipping screws or braces must be removed after the unit

is installed. Be sure to check all tags on the unit to deter-

mine which, if any, of these devices need to be removed.

6. If installing a 42SJ unit, follow Steps a-h. For 42SG and

42SH units, continue to Step 7.

NOTE: The 42SJ back-to-back fan coils have been de-

signed to serve two separate rooms. These products are

classified by Underwriters Laboratories Inc. for use in

penetration firestop systems, control number 27WL when

ordered with 1-hr rated chase. See UL Fire Resistance

Directory for more information. Figure 40 shows the

42SJ unit with standard risers and with Siamese risers.

a. Lay out the control lines for the drywall track and

studs in the floor and ceiling (see Fig. 41).

NOTE: Tracking may be installed now or after the

unit is set.

b. Position the 42SJ fan coil assembly between two

rooms with the unit drywall separation spotted

over the wall control lines.

42SJB

42SJA

42SJB

42SJA

Fig. 40 — 42SJ

Unit with Standard and Siamese Risers

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 87 88

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