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292447-YIM-A-0507
Unitary Products Group 41
7. To adjust Measured CFM to Required CFM, see SUPPLY
AIR DRIVE ADJUSTMENT.
8. After reading has been obtained, remove the tubes and
seal holes.
NOTE: With the addition of field installed accessories repeat
this procedure.
Figure 30: Dry Coil Delta P
Failure to properly adjust the total system air quantity
can result in extensive blower damage.
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
0.55
0.6
0.65
0.7
1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500
Air Flow Rate (cfm)
Coil Pressure Drop (iwg)
100% Return Economizer No Economizer
ZR078
ZR090
ZR102
ZR120
ZR150