Van Air Systems HL-200 - HL2000 - Manual (Page 9)

PAGE 9
INSTALLING THE DRYER SECTION 4
4.4 REMOTE PURGE EXHAUST PIPING
To reduce noise during purging and tower depressurization, this dryer
was supplied with mufflers for installation on the purge exhaust valves.
If the sound or humidity discharged from the dryer is unacceptable, the
purge of this dryer can be remotely piped away.
IMPORTANT
Make sure that the piping is as short as possible and does not
create back pressure on the dryer. To prevent liquid accumula-
tion in the piping and purge valves, the piping must be at the
same level or lower than the purge valves.
The purge line must be vented to atmospheric pressure. If the
ambient temperature at the venting end of the piping is subject
to temperatures below 40
o F, freeze protection must be installed.
The purge valves have threaded pipe connections. Reference
Sections 3.2 through 3.4 for location. Use adequate pipe supports to
prevent stress on valves.
The distance will determine the size of piping that is recommended.
For distances of 10 feet or less, use piping of the same size as the
purge valves. For distances up to 20 feet, use piping one size larger
than the purge valves.
4.5 INSTALLING THE PURGE MUFFLERS
To reduce the sound level during purge and tower depressurization,
this dryer was supplied with mufflers for installation on the purge
exhaust valves.
Mufflers were shipped separately. They should NOT be installed until
the dryer has been operated for several hours. From desiccant
installation, some dust may be present in the desiccant towers.
Operating the dryer with the mufflers installed immediately after the
towers have been filled with the desiccant or during initial start up may
cause the mufflers to clog.
IMPORTANT
The dryer must be operated for several hours without the
mufflers after the towers have been filled with desiccant. This
will prevent the mufflers from becoming clogged.
FIGURE 4B PURGE MUFFLER INSTALLATION
NOTE
Dryer Models HL-1500 thru HL-2000
Have flanged muffler connections.
The power supply to the dryer is to be connected to the dryer control
box. A 7/8" dia hole was provided in the bottom of the box for the
connection of conduit or a cord grip connector.
Check the electrical rating of the dryer as listed on the dryer data tag.
Make sure that the power source is correct for the dryer rating.
Remove the box cover to access the power and alarm terminals.
Wire the power supply as shown in Figure 4C (Standard Control
Box). Connect the wiring to the dryer box. Comply with all codes
applicable for this installation.
4.6-1 STANDARD CONTROL BOX (115V & 230V)
4.6-2 CYCLE SAVER / FAILURE TO SWITCH (115V & 230V)
4.6 ELECTRICAL CONNECTIONS
WARNING
SERIOUS PERSONAL INJURY AND DAMAGE TO THE DRYER
WILL OCCUR IF THE DRYER IS CONNECTED TO A POWER
SOURCE OTHER THAN THE VOLTAGE LISTED ON THE DATA
TAG.
WHEN INSTALLING THE ELECTRICAL CONNECTIONS FOR
THIS DRYER, COMPLY WITH NATIONAL ELECTRICAL CODE
AND ALL APPLICABLE FEDERAL, STATE AND LOCAL
CODES
Same instructions as Standard Control Box except wire the power
supply as shown in Figure 4D (Cycle Saver / Failure To Switch).
FIGURE 4D ELECTRICAL CONNECTIONS
(CYCLE SAVER / FAILURE TO SWITCH)
FIGURE 4C ELECTRICAL CONNECTIONS
(STANDARD CONTROL BOX)
Control Power: 115V /1PH/50-60Hz; 230V/1PH/50-60Hz
Max amp draw: 0.3 AMPS; 0.15 AMPS
General Alarm Contacts: 115V-230V/1PH/60Hz, 0.25 amps
Control Power: 115V /1PH/50-60Hz; 230V/1PH/50-60Hz
Max amp draw: 1 AMPS; 0.5 AMPS
General Alarm Contacts: 115V-230V/1Ph/60Hz, 3 amps