Roofcurb; Provide Clearances; Rig And Place Unit; Inspection - International comfort products PHN524 Installation Instructions Manual

-- The unit MUST be situated to provide safe access for
servicing.
-- The existing roof structure MUST be adequate to
support the weight of the unit or the roof MUST be
reinforced.
Check the weight of the unit in relation to the roof
structure and local building codes or ordinances and
reinforce roof structure if necessary. See Figures 3 and
4 of this manual for unit weights.
-- Support for the unit MUST be level and strong enough
to carry unit weight. The support may consist of a
platform or a combination of platform and roof beams or
curb.
-- See Hoisting section for hoisting instructions.
For hurricane tie downs, contact distributor for details and
PE (Professional Engineering) Certificate if required.

ROOFCURB

Install accessory roof curb in accordance with instructions
shipped with curb. Install insulation, cant strips, roofing, and
flashing. Ductwork must be attached to curb.
IMPORTANT: The gasketing of the unit to the roof curb is
critical for a water tight seal. Install gasketing material
supplied with the roof curb. Improperly applied gasketing
also can result in air leaks and poor unit performance.
Curb should be level to within 1/4 in. (6mm). This is
necessary for unit drain to function properly. Refer to
accessory roof curb installation instructions for additional
information as required.
Step 3—Provide Clearances
The required minimum service clearances are shown in Fig.
3 and 4. Adequate ventilation and outdoor air must be
provided. The outdoor fan draws air through the outdoor coil
and discharges it through the top fan grille. Be sure that the
fan discharge does not recirculate to the outdoor coil. Do not
locate the unit in either a corner or under an overhead
obstruction. The minimum clearance under a partial
overhang (such as a normal house overhang) is 48 in.
(1219mm) above the unit top. The maximum horizontal
extension of a partial overhang must not exceed 48
in.(1219mm).
IMPORTANT: Do not restrict outdoor airflow. An air
restriction at either the outdoor--air inlet or the fan discharge
may be detrimental to compressor life.
Do not place the unit where water, ice, or snow from an
overhang or roof will damage or flood the unit. Do not install
the unit on carpeting or other combustible materials.
Slab--mounted units should be at least 4 in. (102mm) above
the highest expected water and runoff levels. Do not use
unit if it has been under water.
Step 4—Rig and Place Unit
Rigging and handling of this equipment can be hazardous
for many reasons due to the installation location (roofs,
elevated structures, etc.).
Only trained, qualified crane operators and ground support
staff should handle and install this equipment.
When working with this equipment, observe precautions in
the literature, on tags, stickers, and labels attached to the
equipment, and any other safety precautions that might
apply.
Training for operators of the lifting equipment should
include, but not be limited to, the following:
1. Application of the lifter to the load, and adjustment of
the lifts to adapt to various sizes or kinds of loads.
2. Instruction in any special operation or precaution.
3. Condition of the load as it relates to operation of the
lifting kit, such as balance, temperature, etc.
Follow all applicable safety codes. Wear safety shoes and
work gloves.

INSPECTION

Prior to initial use, and at monthly intervals, all rigging
brackets and straps should be visually inspected for any
damage, evidence of wear, structural deformation, or
cracks. Particular attention should be paid to excessive
wear at hoist hooking points and load support areas.
Brackets or straps showing any kind of wear in these areas
must not be used and should be discarded.
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before installing or servicing system, always turn off
main power to system. There may be more than one
disconnect switch. Turn off accessory heater power
switch if applicable. Tag disconnect switch with a suitable
warning label.
WARNING
!
UNIT FALLING HAZARD
Failure to follow this warning could result in personal
injury or death.
Never stand beneath rigged units or lift over people.
WARNING
!
PROPERTY DAMAGE HAZARD
Failure to follow this warning could result in personal
injury/death or property damage.
Rigging brackets for one unit use only. When
removing a unit at the end of its useful life, use a new set
of brackets.

USE OF RIGGING BRACKET

NOTE: Units may require accessory kit NPLIFTBK003A10.
Field Installation of Rigging Bracket (if not already installed)
1. Remove unit from shipping carton. Leave top shipping
skid on the unit for use as a spreader bar to prevent the
rigging straps from damaging the unit. If the skid is not
available, use a spreader bar of sufficient length to
protect the unit from damage.
2. Remove 4 screws in unit corner posts.
3. Attach each of the 4 metal rigging brackets under the
panel rain lip (See Fig. 2). Use the screws removed in
step 2 above to secure the brackets to the unit.
3