11
SIZING
Determining dryer capacity at actual operating conditions.
To determine the maximum inlet flow capacity of a dryer at vari
-
ous operating conditions, multiply the rated capacity from Table
1 by the multipliers shown in Table 2.
Example: How many scfm can a 60 Hz air-cooled model 1000
handle when compressed air to be dried is at 200 psig and
100°F; ambient air temperature is 80°F?
Answer: 1,000 x 1.22 x 1.12 = 1,366 scfm.
TABLE 1
Rated capacity (scfm) @ 100 psig inlet pressure, 100°F inlet
temperature, and 100°F ambient temperature.
MODEL
1000
1250
1500
1750
2000
2500
3000
Rated capacity
of air-cooled
models (scfm)
60 Hz
50 Hz
1000
830
1250
1050
1500
1250
1750
1460
2000
1670
2500
2080
3000
2500
When removing liquids at rated flow conditions, the
pressure drop will be 5 psi (0.35 bar), or less, across
the entire dryer. An increase in pressure drop will
occur only as the separator/filter elements become
loaded with solid particles. It is recommended, for
maximum filtration efficiency, the separator/filter ele
-
ments be replaced when the pressure drop across the
dryer exceeds 10 psi (0.7 bar), or every 12 months,
whichever occurs first.
2. Replacement of the Separator/Filters
Depressurize the unit before servicing.
Failure to do this may result in injury.
a. Open the bypass between compressed air inlet and
outlet. (if equipped)
b. Close the shut-off devices at the compressed air
inlet and outlet.
c. Press the Drain Test button on the control panel
(see page 5 for description and location) until the
system is depressurized.
d. Switch off the dryer.
e. Remove the insulation [1].
f. Loosen the screws [2] of the filter housing. Caution
is necessary as the system may still be under slight
residual pressure.
g. Remove all screws except one and swing flange [3]
to the side.
h. Pull out the old cartridges [4].
i. Push new cartridges on to the mounting posts in the
bottom of the separator vessel.
NOTE: Do not touch the foam sleeves of the
cartridges with your fingers.
j. Close housing in reverse order.
k. Put on insulation.
l. Switch on the dryer.
m. Repressurize the dryer by slowly opening the
compressed air inlet valve.
n. Slowly open the compressed air outlet valve.
o. Slowly close the compressed air bypass valve (if
equipped).
3.3 Filter Monitor Programming (optional)
A. Each Filter Monitor needs to be initialized whenever a new
filter element is installed. Initialization resets the Intel
-
ligence circuitry to begin establishing a new performance
baseline consistent with the unique signature of each
individual element.
B. To retain the existing settings previously established
simply:
1. Press and hold the “enter” button until the
programming icon begins flashing.
2. Slowly press and release the “enter” button five (5)
times.
3. Only the
will appear on the LCD display for
the first 2 minutes of operation. Initialization is now
complete.
TABLE 2
Air capacity correction factors (Multipliers)
INLET COMPRESSED AIR CONDITIONS
INLET
INLET TEMPERATURES
PRESSURES
80°F
90°F
100°F
110°F
120°F
psig
barg
27°C
32°C
38°C
43°C
49°C
50
80
100
125
150
175
200
3.4
5.5
6.9
8.6
10.3
12.1
13.8
1.35
1.50
1.55
1.63
1.70
1.75
1.80
1.05
1.17
1.23
1.31
1.37
1.42
1.47
0.84
0.95
1.00
1.07
1.13
1.18
1.22
0.69
0.79
0.82
0.91
0.95
0.99
1.03
0.56
0.66
0.70
0.74
0.80
0.84
0.89
COOLING MEDIUM*
AMBIENT
TEMPERATURE
MULTIPLIER
°F
°C
80
90
100
110
27
32
38
43
1.12
1.06
1.00
0.94
*Air-cooled models; water-cooled models use 1.15 multiplier if cooling water is
below 95°F (35°C).
