2
Step 2 — Rig and Place Unit —
Inspect unit for
transportation damage. See Tables 1-4 for physical data. See
Fig. 2 for illustrations on lifting small and large units. File any
claim with transportation agency.
Do not drop unit; keep upright. Use wooden top skid or
spreader bars over unit to prevent sling or cable damage.
Rollers may be used to move unit across a roof. Level by using
unit rail as a reference; leveling tolerance is ±
1
/
16
in. per linear
ft in any direction. Refer to the DOAS (Dedicated Outdoor Air
System) Builder generated submittal for weights and dimen-
sions of a unit.
POSITIONING — Maintain clearance around 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 air
inlets near exhaust vents or other sources of contaminated air.
For proper unit operation, adequate combustion and ventilation
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.
For gas heat units, locate mechanical draft system flue as-
sembly at least 4 ft from any opening through which combus-
tion products could enter the building, and at least 4 ft from any
adjacent building (or per local codes). When the unit is located
adjacent to public walkways, flue assembly must be at least 7 ft
above grade. Locate unit at least 10 ft away from adjacent
units.
Clearances
The clearances below are the required distances that the unit
must be away from objects and other units to allow service ac-
cess and proper operation of the unit. For unit dimensions, refer
to Fig. 3-8.
Service Clearances
The minimum recommended service clearance is 48 in. on
all sides of unit with access doors.
Ventilation Clearances
In order to ensure proper operation of an air source unit, a
24-in. clearance for ventilation must be maintained on the
sides. In addition, specific ventilation situational clearance
guidelines are listed below.
• Do not locate the unit under an overhang or near a wall
or other equipment that fosters short circuiting hot air to
the condenser coil intakes.
• Do not locate unit within 10 ft, or directly downwind,
from exhaust fans or flues.
• Do not locate adjacent unit condenser sections closer
than 6 ft to one another to reduce the possibility of con-
denser air circulation.
ROOF MOUNT — Check building codes for weight distribu-
tion requirements. Unit operating weight is shown in the
DOAS Builder generated submittal. When installing the equip-
ment on top of a building, the following should be considered.
Structural members supporting the unit must be sufficiently
strong for the weight of the unit and mounting rails. Transmis-
sion of sound into the building is sometimes a problem when
the structure is not strong enough.
SLAB MOUNT — When installed at ground level, the unit
should be mounted on a level concrete slab which should
extend at least 2-in. beyond the unit on all sides. The top of
the slab should be 2-in. above the ground level. The depth
of the slab below the ground level and its structural design
CAUTION
All panels must be in place when rigging. Failure to do so
may damage the unit.
Fig. 1 — Label Placement
ITEM #
PART #
DESCRIPTION
1
91070002
Warning Label
2
91031108
Door Latch Label
3
91070016
CA Cancer Warning Label
4
Manufacturer’s Data label
5
91060002
R-410A Label
6
9-21577
Hot Surface Label
7
0527N-0018
Condensate Trap Label
8
057-0048
Copper Conductor Label
9
S-8238
Additional Parts Label
10
Brand Label
11
0527N-0620
Rotation Label
