| VF, DHT, AES Series Manual
Refrigerated Air Dryer User Manual
12
3.5 Preliminary Start-Up Checklist
1. Check that the inlet and outlet connections are the correct
size and pressure rating, and tightened securely.
2. Check that the correct power supply is connected to the
non-cycling refrigerated air dryer system with an adequate
disconnect switch.
3. Check that all compressed air line service valves are open
and that compressed air is available to be supplied to the
non-cycling refrigerated air dryer system.
4. Check that all liquid drain service valves are open. This is
to ensure that any residual bulk condensate that may have
accumulated in the compressed air lines is discharged
immediately upon start up. These drains must be closed
once system is brought on line for use. The drain valve on
the refrigerated air dryer can be opened by pushing the
test button located on the drain body.
5. With the customer-supplied compressed air to the system,
OPEN the inlet valve slowly to gradually pressurize the
system. Do not open valve too quickly. Opening valve and
suddenly pressurizing the system can cause damage to the
dryer heat exchanger and other components.
6. Check the air system piping connections and dryer system
connections for leaks at this time. Repair and retest any
leaks.
7. Verify that all instrumentation (pressure gauge/s) and
drain air tubing fittings are tight.
Incoming Water Flow Rate Requirements
(in gpm at dierent inlet water temperature)
Model by SCFM
Rating Condenser HP 70°F 80°F 85°F 90°F
600 3.0 8 9 10 C/F
800 4 8 9 10 C/F
1,000 5 13 14.5 16 C/F
1,250 6 14 16 18 C/F
1,500 7.5 18 20 22 C/F
1,750 & 2,000 10 26 29 32 C/F
TABLE 3-6: Water-Cooled Water Flow Requirements- AES Series
*Requirements are per module
C/F: Consult Factory
NOTICE
• For single-phase models, wait at least six (6) hours
after transporting or moving of dryer system
before starting the dryers. Turn the main power
switch to the dryer on, but do not turn the dryer
on/o switch to the on position until six (6) hours
have passed.
• For three-phase models, ensure that the power
switch is in the “o” position, but the electrical
service to the dryer is energized. This dryer must
be in this mode for at least twelve (12) hours
to allow the compressor crankcase heater to
energize and evaporate any liquid refrigerant
from the compressor. After twelve (12) hours,
turn on the power switch of the dryer. The power
indicating light should turn on.
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