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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
Unless otherwise noted, vertical-horizontal air handing units are UL listed up to 0.5 in. wg total static pressure, including coil, case, duct work pressure drop, air filter, and largest kW size heater. Internal static
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
from high speed setting value to: From 24kBtu/h of capacity: 4; From 36kBtu/h of capacity: 5
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.
Table 82: Multi F Vertical-Horizontal Air Handling Unit External Static Pressure Setting Values Table.
Model No. / Nominal Capacity of
Indoor Unit (Btu/h)
Heater Capacity (kW)
5 10 15 20
LMVN240HV (24,000)
480 CFM 480 CFM Not Available Not Available
LMVN360HV (36,000)
780 CFM 780 CFM Not Available Not Available
Table 83: Multi F Vertical-Horizontal Air Handling Unit Minimum Airow by Heater Capacity.
Do not operate the air conditioning system using less than the minimum airow. There is risk of re and severe injury or death.
Heater Capacity (kW) Static Pressure Drop (in. wg)
0
0
5
-0.01
10
-0.02
Table 84: Electric Heater Static Pressure Drop.
Note:
• The external static pressure value must be reset if an electric heater is installed. For each 0.01 in. wg. increase in static pressure, the
external static pressure must increase by 1.
• If the external static pressure is not set properly, the provided safety device will turn off the heater (according to airflow).
Table 85: Field-Supplied Air Filter Static Pressure Drop Factors.
Model No. / Nominal Capacity of Indoor Unit (Btu/h) Airow Rate / CFM 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:
• The external static pressure value must be reset if an air filter is installed. For each 0.01 in. wg. increase in static pressure, the
external static pressure must increase by 1.
• Factory tested with MERV 4 filter media. Fan speed set value when the unit is used with field-supplied filter media.
Note:
Do not operate the air conditioning system using less than the minimum airow. There is risk of product damage.
VERTICAL-HORIZONTAL | 165
Vertical-Horizontal Air Handling
Due to our policy of continuous product innovation, some specications may change without notication.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG” is a registered trademark of LG Corp.
MULTI
F
MAX
MULTI
F
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