Carrier 48TM016-028 Specifications download pdf (Page 2)

INSTALLATION

Inspect unit for transportation damage. If &_mage is found,

file any claim with the transportation agency.

Step 1 -- Provide Unit Support

ROOF CURB -- Assemble and install accessory roof curb or

horizont_d a&tpter roof curb in accordance with instructions

shipped with this accessory. See Fig. I-2B. Install insulation,

cant strips, roofing, and counter flashing as shown. Ductwork

can be installed to roof curb or horizontal adapter roof curb be-

fore unit is set in place. Curb or a&tpter roof curb should be

level. This is necessary to permit unit drain to function proper-

ly. Unit leveling tolerance is + l/ir_ in. per linear fl in any direc-

tion. Refer to Accessory Roof Curb or Horizontal A&_pter

Roof Curb Inst_fllation Instructions for additional information

as required. When accessory roof curb or horizontal adapter

roof curb is used, unit may be installed on class A, B, or C roof

covering material.

IMPORTANT: The gasketing of the unit to the roof curb

or adapter roof curb is critical for a watertight se_d.

Inst_fll gasket with the roof curb or adapter as shown in

Fig. 2A and 2B. Improperly applied gasket can also

result in air leaks and poor unit performance.

ALTERNATE UNIT SUPPORT -- When the curb or adapter

cannot be used, install unit on a noncombustible surface. Sup-

port unit with sleepers, using unit curb support area. If sleepers

cannot be used, support long sides of unit with a minimum of

3 equally spaced 4-in. x 4-in. pads on each side.

Step 2 -- Rig and Place Unit-- Do not drop unit;

keep upright. Use spreader bars over unit to prevent sling or ca-

ble &image. Rollers may be used to move unit across a roof.

Level by using unit frmne as a reference; leveling tolenmce is _+

_/lr_in. per linem fl in any direction. See Fig. 3 for additional in-

formation. Unit operating weight is shown in Table 1.

Four lifting holes are provided in ends of unit base rails as

shown in Fig. 3. Refer to rigging instructions on unit.

NOTE: On 48TM028 units, the lower forklift braces must

be removed prior to setting unit on roof curb.

POSITIONING- Maintain clearance, per Fig. 4-6, _u'ound

and above unit to provide minimum distance from combustible

materials, proper airflow, and service access.

Do not install unit in an indoor location. Do not locate unit

air inlets near exhaust vents or other sources of contmninated

all: For proper unit operation, adequate combustion and venti-

lation air must be provided in accordance with Section 5.3 (Air

for Combustion and Ventilation) of the National Fuel Gas

Code, ANSI Z223.1 (American National Standards Institute).

Although unit is weatherproof, guard against water from

higher level runoff and overhangs.

Ix)cate mechanical di'aft system flue assembly at least 4 il

from any opening through which combustion products could

enter the building, and at least 4 ft from any adjacent building.

When unit is located adjacent to public walkways, flue assem-

bly must be at least 7 11above grade. Ix)cate unit at least 10 1l

away from adjacent units.

ROOF MOUNT -- Check building codes for weight distri-

bution requirements. Unit operating weight is shown in

Table 1.

hlstructions continued on page ll.

14-314 _

NOTE: CRRFCURB013A00 is a fully factory preassembled hori-

zontal adapter and includes an insulated transition duct. The pres-

sure drop through the adapter curb is negligible.

For horizontal return applications: The power exhaust and baro-

metric relief dampers must be installed in the return air duct.

25%VENTAIR//

ECONOMIZER

HOOD

LOC -O P

HORIZONTAL SUPPLY

CURB (CRRFCURB013A00)

///

TRANSITION

DUCT

FULLYINSULATED

SUPPLYPLENUM

32_] _ _ 2"uXI_)RTTYP. /_ 11"11/NSUDL_TIsINy,

, !t]// STITCHWELDED/ STI,IK PINN?D & _UED

143/4"/ I I Z I 23"

12" WIDE STANDING

SEAM PANELS

ACCESSORY CURB

PACKAGE NO. HEIGHT.

CRRFCURB013A00] (584) ]

DESCRIPTION

Pre-Assembled, Roof Curb,

Horizontal Adapter

Fig. 1 -- Horizontal Supply/Return Adapter Installation (48TM016-025)

1 2 3 4 5 6 7 ... 59 60

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Carrier 48TM016-028 Specifications Page 2

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