Carrier 39CQ - Page 28

EN - 12
Fan motor assemblies:
- Check the power supply voltage and heat protection calibration in accordance with the current ratings of the various elements
- Check that the earth is connected and that the wheel turns freely
- Check the air flow and operating pressure
Calculating the air flow:
Plug fan with asynchronous motor Plug fan with EC motor

3
Q K
=
√
2
—
ρ
. (ΔP)
x Nombre de GMV
Q: air flow (m3/h)
ρ: air volume mass (kg/m3)
P: pressure (Pa)
K = 60 (for NPL 280 FMA)
Q K
=
√
(ΔP) x Nombre de GMV
Q: air flow (m3/h)
ρ: air volume mass (kg/m3)
P: pressure (Pa)
K = 93 (for K3G 280 FMA)