Multi F Engineering Manual

External Static Pressure
TWO-WAY VAHU INDOOR UNITS
Static Pressure (in. wg) 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Model No. / Nominal Capacity
of Indoor Unit (Btu/h)
Airflow Rate / CFM Setting Value at (in. wg)
1
LMVN240HV
24,000
High 710 56 67 74 78 87 94 98 98
2
98
2
98
2
Mid 640 53 65 70 75 85 91 96 96
2
96
2
96
2
Low 480 53 55 64 70 79 84 92 92
2
92
2
92
2
LMVN360HV
36,000
High 990 80 85 90 95 100 103 103
2
103
2
103
2
103
2
Mid 880 65 72 80 85 92 98 103 103
2
103
2
103
2
Low 800 65 69 77 82 90 96 101 101
2
101
2
101
2
1
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pressure includes coil and case only.
2
Airflow rate (CFM) decreases by 3% per 0.1 in. wg.
3
Maximum airflow rate is 400 CFM per ton. (For the 24,000 Btu/h unit, the maximum airflow rate is 2 x 400 = 800 CFM). If airflow is set at the maximum rate, the external static pressure value must be increased
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4
High static pressure is 0.5 in. wg (factory setting); low static pressure is 0.3 in. wg.
Note:
If external static pressure is not set correctly, the air conditioning system will not operate properly or will malfunction.
7DEOH Multi F Vertical-Horizontal Air Handling Unit External Static Pressure Setting Values Table.
Model No. / Nominal Capacity of
Indoor Unit (Btu/h)
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5 101520
LMVN240HV (24,000)
480 CFM 480 CFM Not Available Not Available
LMVN360HV (36,000)
780 CFM 780 CFM Not Available Not Available
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+HDWHU&DSDFLW\N: Static Pressure Drop (in. wg)
0
0
5
-0.01
10
-0.02
7DEOH Electric Heater Static Pressure Drop.
Note:
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external static pressure must increase by 1.
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7DEOH Field-Supplied Air Filter Static Pressure Drop Factors.
Model No. / Nominal Capacity of Indoor Unit (Btu/h) $LUÀRZ5DWH&)0 Static Pressure Drop (in. wg)
LMVN240HV (24,000)
High 710 -0.04
Mid 640 -0.03
Low 480 -0.03
LMVN360HV (36,000)
High 990 -0.07
Mid 880 -0.05
Low 800 -0.05
Note:
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external static pressure must increase by 1.
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Note:
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VERTICAL-HORIZONTAL | 143
Vertical-Horizontal Air Handling
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MULTI
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