6
5-572.10
ROOF CURB
INSTALLER’S
EYE BOLTS
INSTALLER’S
CABLES AND
SPREADERS
Figure 6.2 - Typical Rigging
WARNING
Failure to follow proper lifting instructions and applicable
safety procedures could result in property damage, serious
injury, or death. Lifting should only be done by a qualified
rigging company. Use ALL lifting points. Test lift to ensure
proper balance and rigging. Never lift in high winds.
A
B
CONCRETE SLAB
ON GRAVEL BED
(4” MIN)
A & B ARE BETWEEN
ANCHOR POINTS
Figure 6.1 - Slab-Mounted Make-Up Air Unit
Table 6.1 - Slab Anchor Bolt Dimensions
Slab Mounted Units
For Horizontal Discharge (Model Digit 2=B or C)
For ground level installation of a horizontal-discharge unit,
prepare a level concrete slab at least four inches thick on
adequate footings and a generous bed of gravel for drainage
(See Figure 6.1). The slab should include threaded 5/8-inch
anchor bolts spaced as shown in Figure 6.1 and Table 6.1.
Anchor bolts should extend at least 1-1/2" above the surface of
the pad to allow clearance for mounting washers, nuts and bolts
(mounting washers, nuts and bolts by others). The slab should
extend out at least six inches around the perimeter of the unit.
Digit 2
Model Size
Blower Type
(Digit 16)
A
B
B
75
All
82.91
33.85
100/125
All
82.91
36.36
150/175
All
82.91
40.61
200/225
All
82.91
42.71
250/300
E, F, G, or H
82.91
45.75
I, J, or K
118.50
45.75
350/400
E, F, G, or H
82.91
57.27
I, J, or K
118.50
57.27
500/600
G or H
116.03
45.75
I, J, K, or L
151.62
45.75
700/800
G or H
116.03
57.27
I, J, K, or L
151.62
57.27
840/960
All
185.02
57.27
C
75
All
106.89
33.85
100/125
All
106.89
36.36
150/175
All
106.89
40.61
200/225
All
106.89
42.71
250/300
E, F, G, or H
106.89
45.75
I, J, or K
142.48
45.75
350/400
E, F, G, or H
106.89
57.27
I, J, or K
142.48
57.27
Rigging and lifting of the units should only be done by a
qualified rigging company and follow appropriate industry
standards, including but not limited to the appropriate sections
of ASME B30, OSHA 1910, and OSHA 1926.
Four 3/4-inch holes at the extended ends of the mounting
channels are supplied to facilitate lifting the unit with eyebolts
furnished by the installer. With the lifting points identified, the
units can be lifted by crane or helicopter.
1. Follow site preparation instructions for the roof curb, slab,
or equipment stand before installation.
2. Check the Serial Plate(s) of unit with plans to be sure unit
is properly located. Although units may look outwardly
similar, their function, capacities, options, and accessories
will often vary.
3. Check unit dimensions of both the unit base and the curb
or stand on which the unit will be installed.
4. If the unit will be installed on a roof curb:
a. Thoroughly clean and dry the top of the curb surface.
b. Lay a bead of weather resistant caulking on top
perimeter of roof curb as illustrated in Figure 5.2. Note:
If roof curb is supplied by Modine, full perimeter gasket
material is supplied and caulking is not necessary.
5. When lifting the equipment, connect sturdy steel cables,
chains, or straps with eye loops as illustrated in Figure 6.2.
For stability in lifting and lowering and to prevent damage
to the unit, include a spreader bar as shown in Figure 6.2.
Avoid twisting or uneven lifting of the unit. The cable length
from the lifting point on the unit to the spreader bar should
always be longer than the distance between the outer
lifting points.
6. Test lift the unit to check for proper rigging balance before
hoisting to the desired installation location.
7. Once lifted to the installation location, orient the hoisted
unit to match the ductwork locations and set evenly on the
curb or stand.
8. Following the instructions in this manual, make final unit
connections for ductwork, utilities, and controls.
General Rigging Instructions
SLAB MOUNT INSTALLATION / RIGGING INSTRUCTIONS