Step 5 install supply unit, Step 6 attach ductwork to unit discharge, Duct size/location and intake dimensions – Greenheck KSF (457646) User Manual
Page 3
3
Lifting Lugs
(4 places)
step 5 install supply Unit
Use a crane hooked to the factory lifting lugs (as shown in the diagram) to lift and center the unit on the curb. For
larger units with 7½ to 10 horsepower motors, it is recommended to use a spreader bar to support the unit while
lifting.
Use self-tapping sheet metal screws to fasten unit to the curb through the holes provided.
Electrical connections can be made at this time.
Complete installation
Illustration shows the complete installation of a
downblast unit. If the unit is horizontal discharge,
proceed to Step 6.
step 6 attach Ductwork to Unit Discharge
For horizontal discharge units: The chart and drawing show opening size and location for the 2 inch discharge
collar. Also included is the recommended straight duct lengths for optimal performance. Greenheck recommends
attaching ductwork to collar using a rubber duct section at the unit to eliminate vibration.
Discharge Collar
Dimensions
Intake Opening
Dimensions
D
C
A
B
E
F
Curb
Height
Curb
Height
Duct size/Location and intake Dimensions:
Housing
Size
Blower
Size
A
B
C
D
E
F
Straight
Duct
Length*
1
108
9
13
8
1
⁄
2
13
26
27
37
109
9
13
8
1
⁄
2
13
26
27
37
110
9
3
⁄
4
14
8
14
26
27
47
2
112
10
1
⁄
2
16
12
16
36
33
54
115
12
7
⁄
8
20
10
20
36
33
68
3
118
15
1
⁄
4
24
14
24
48
43
81
120
14
1
⁄
4
26
13
26
48
43
96
*AMCA recommended minimum straight duct lengths for
optimum performance.
All dimensions are shown in inches.