Quincy Compressor QOFT 20, Instruction Book

Page: 50 / 84

Instruction book
48 9829 3199 7 4
Text on drawing
Reference Designation
(1) Minimum free area to be reserved for the compressor installation
(2) Ventilation proposals
Description/recommendations
1. Compressor unit:
Install the compressor on a level floor, capable of taking the weight of the compressor.
Recommended minimum distance between the top of the unit and the ceiling is 1200 mm for
ventilation purposes.
2. Compressed air outlet valve
.
3. Delivery pipe:
The pressure drop over the air delivery pipe can be calculated as follows:
Δp = (L x 450 x Q
c
1.85
) / (d
5
x P)
d = Inner diameter of the pipe in mm
Δp = Pressure drop in bar (recommended maximum: 0.1 bar (1.5 psi))
L = Length of the pipe in m
P = Absolute pressure at the compressor outlet in bar
Q
c
= Free air delivery of the compressor in l/s
4. Ventilation: the inlet grids and ventilation fan should be installed in such a way that any
recirculation of cooling air to the compressor is avoided. The air velocity to the grids must be
limited to 5 m/s (16.4 ft/s).
The maximum air temperature at the compressor intake opening is 40 ˚ C (104 ˚ F), the
minimum temperature is 0˚C (32 ˚ F).
For ventilation alternatives 1 and 3, the required ventilation to limit the compressor room
temperature can be calculated from:
Q
v
= (X.N + Y)/ΔT, in which
Q
v
= required cooling air flow (m
3
/s)
N = nominal motor power of the compressor (kW)
ΔT = temperature increase in compressor room (˚C)
For ventilation alternatives 2 and 4, the fan capacity of the compressor ducting should
match the compressor fan capacity at a pressure head equal to the pressure drop caused by
the cooling air ducts.
5. The drain pipes to the drain collector must not dip into the water of the drain collector.
6. Control cubicle with monitoring panel.
7. Power supply cable to be sized and installed by a qualified electrician.
X Y (Pack)
QOFT 20, QOFT 25, QOFT 30 1.145 0.00
QOFT 40 , QOFT 50 , QOFT 60 1.1 36 0.00
In case of an IT network, consult Quincy.
8. Safety valve