Engineering Manual

External Static Pressure
FOUR-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
LVN180HV4
18,000
High 640 63 67 75 81 88 91 95 — — —
Mid 580 57 63 69 77 84 89 93 — — —
Low 480 51 59 65 73 80 87 91 — — —
LVN240HV4
24,000
High 710 67 71 79 85 92 94 97 — — —
Mid 640 63 67 75 81 88 91 95 — — —
Low 480 51 59 65 73 80 87 91 — — —
LVN360HV4
36,000
High 1,100 65 71 79 86 92 96 102 106 112 —
Mid 1,000 61 67 75 82 88 94 100 104 110 116
Low 900 57 63 71 78 84 92 98 102 108 114
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
Factory default setting is 0.3 in wg
4
Factory default setting is high static pressure
Table 94: Multi F Vertical-Horizontal Air Handling Unit External Static Pressure Setting Values Table.
Note:
• If the ESP is set incorrectly, the air conditioning may malfunction.
• To get the desired air flow and external static pressure combination, use the setting value from the table.
Using a setting value other than the values listed in the table will not provide the desired combination.
Capacity (kBtu/h [tons]) Flow Rate (CFM) Static Pressure Drop (in wg)
18 (1.5)
High (640) -0.04
Middle(580) -0.04
Low (480) -0.04
24 (2.0)
High (710) -0.04
Middle(640) -0.04
Low (480) -0.04
36 (3.0)
High (1100) -0.08
Middle(1000) -0.08
Low (900) -0.08
Table 95: Air Filter Static Pressure Drop Factors.
Capacity (kBtu/h [tons])
Heater Capacity kW
3, 5 8, 10 15 20
18 (1.5)
480 480 Not Available Not Available
24 (2.0)
480 480 Not Available Not Available
36 (3.0)
900 900 900 900
Table 96: Minimum Airow (CFM) by Heater Capacity
Do not operate with less than the minimum airow. If an airow
is used below the minimum, there is a risk of re, which may
lead to physical injury or death
Note:
Do not operate with less than the minimum airow. If an airow is
used below the minimum, there is a risk of damage to the product.
VERTICAL-HORIZONTAL | 165
Vertical-Horizontal Air Handling Unit
Due to our policy of continuous product innovation, some specications may change without notication.
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MULTI
F
MAX
MULTI
F