LG ARNU423B8A4 - Page 168

168 | VAH
MULTI V Ducted Indoor Unit Engineering Manual
Due to our policy of continuous product innovation, some specications may change without notication.
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Table 127: Minimum Airow 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 damage to the product.
Airflow rates in the table above are listed in CFM. Flow rate (CFM) is decreased by 3% per 0.1 in wg from 0.8 in wg to 1.0 in wg.
Capacity (MBh [tons])
Heater Capacity (kW)
3 5 8 10 15 20
12 (1.0) 380 380 380 Not available Not available Not available
18 (1.5) 480 480 480 480 Not available Not available
24 (2.0) 480 480 480 480 Not available Not available
30 (2.5) 630 630 630 630 Not available Not available
36 (3.0) 900 900 900 900 900 900
42 (3.5) 1,000 1,000 1,000 1,000 1,000 1,000
48 (4.0) 1,000 1,000 1,000 1,000 1,000 1,000
54 (4.5) 1,300 1,300 1,300 1,300 1,300 1,300
Table 128: Electric Heater Static Pressure Drop Factors.
in wg = inch water gauge
If the electric heater has been installed, then the ESP value has to be set.
For every increase in static pressure by 0.01 in wg, the ESP value must be increased by 1.
If the ESP setting value is inappropriate, the provided safety device will turn the heater off according to
the airflow.
Heater Capacity (kW) Static Pressure Drop (in. wg)
0 0
3 -0.01
5 -0.01
8 -0.02
10 -0.02
15 -0.04
20 -0.06
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.
VERTICAL / HORIZONTAL AIR HANDLER
Heater Capacity Airow / Static Pressure Drop Factors