4
•
Do not locate the unit in an area where the outdoor air
(i.e. combustion air for the unit) will be frequently
contaminated by compounds containing chlorine or
fluorine. Common sources of such compounds include
swimming pool chemicals and chlorine bleaches, paint
stripper, adhesives, paints, varnishes, sealers, waxes (which
are not yet dried) and solvents used during construction
and remodeling. Various commercial and industrial
processes may also be sources of chlorine/fluorine
compounds.
•
To avoid possible illness or death of the building occupants,
do NOT locate outside air intake device (economizer,
manual fresh air intake, motorized fresh air intake) too
close to an exhaust outlet, gas vent termination, or
plumbing vent outlet. For specific distances required,
consult local codes.
•
Allow minimum clearances from the enclosure for fire
protection, proper operation, and service access (see Unit
Clearances). These clearances must be permanently
maintained.
•
When the unit is heating, the temperature of the return
air entering the unit must be between 50°F and 100°F.
G
ROUND
L
EVEL
I
NSTALLATIONS
O
NLY
:
•
When the unit is installed on the ground adjacent to the
building, a level concrete (or equal) base is recommended.
Prepare a base that is 3” larger than the package unit
footprint and a minimum of 3” thick.
•
The base should also be located where no runoff of water
from higher ground can collect in the unit.
R
OOF
TOP
I
NSTALLATIONS
O
NLY
:
•
To avoid possible property damage or personal injury, the
roof must have sufficient structural strength to carry the
weight of the unit(s) and snow or water loads as required
by local codes. Consult a structural engineer to determine
the weight capabilities of the roof.
•
The unit may be installed directly on wood floors or on
Class A, Class B, or Class C roof covering material.
•
To avoid possible personal injury, a safe, flat surface for
service personnel should be provided.
•
As indicated on the unit’s data plate, a minimum clearance
of 36” to any combustible material is required on the access
side of the unit. All combustible materials must be kept
out of this area.
•
This 36” clearance must also be maintained to insure
proper combustion air flow. The combustion air intake
must not be blocked for any reason, including blockage by
snow.
•
Adequate clearances from the unit to any adjacent public
walkways, adjacent buildings, building openings or
openable windows must be maintained in accordance with
National Codes.
U
NIT
P
RECAUTIONS
•
Do not stand or walk on the unit.
•
Do not drill holes anywhere in panels or in the base frame
of the unit (except where indicated). Unit access panels
provide structural support.
•
Do not remove any access panels until unit has been
installed on roof curb or field supplied structure.
•
Do not roll unit across finished roof without prior approval
of owner or architect.
•
Do not skid or slide on any surface as this may damage
unit base. The unit must be stored on a flat, level surface.
Protect the condenser coil because it is easily damaged.
R
OOF
C
URB
I
NSTALLATIONS
O
NLY
:
Before installing this unit...
IMPORTANT NOTE: This unit has been equipped with a shipping
brace under the compressor section that
MUST BE REMOVED
be-
fore installing the unit on a roof curb.
Please follow the instructions below to remove brace.
W
HEN
UNIT
IS
SUSPENDED
,
BOARDS
AND
SHIPPING
BRACE
WILL
DROP
WHEN
SCREWS
ARE
REMOVED
. T
O
PREVENT
PERSONAL
INJURY
, STAND CLEAR.
R
EMOVE
FORK
HOLE
BRACKETS
,
BOARDS
AND
SHIPPING
BRACE
FROM
BOTTOM
OF
UNIT
BEFORE
PLACING
UNIT
ONTO
CURB
.
CAUTION
1. Remove wooden struts and shipping brace per installation
instructions.
The struts are located in the fork holes and
are used to protect the unit from damage while lifting with
forks. The shipping brace is located underneath the unit
(under compressors).
Also remove the fork hole brackets
as shown in the following figure.
2. Locate and remove the end brackets as shown in the
following graphic.
