INSTRUCTION MANUAL
Model HC
Reference 219 Rev 2
Page 8 of 46 06/20/2013
1.0.1 Dryer Location and Mounting Specifications (continued)
1.0.1.12 For electrical connections, refer to the electrical drawing in
Section 8. Be sure to look for any auxiliary connections, such
as remote alarm contacts, compressor interlock relay (if
needed), or analog (4-20mA) signals.
1.0.1.13 Ensure that the inlet and outlet connections to and from the
dryer are made using the correct rated fittings and piping to
meet the design conditions. For connection details, refer to the
flow schematic in Section 8.
1.0.1.14 Insulate the pipe between the compressor and dryer to
minimize heat loss.
1.0.1.15 Do not hydrostatically test the pressure vessels. All HC dryer
pressure vessels are hydrostatically tested at 1.3x the design
pressure, per ASME code, after fabrication and before
assembly of the dryer.
1.0.1.16 It is recommended that the common alarm relay, located in the
dryer control panel, be connected to the control room or
operator station, so that an immediate response to the dryer
alarm may be given when required.
1.0.1.17 If the equipment is installed in a high traffic area, protective
barriers may be required to prevent possible damage of
equipment and to prevent contact with hot surfaces.
1.0.2 Preventative Maintenance Prior to Start-up
1.0.2.1 All air dryers are tested at the factory for leak-tight joints and
tightness of bolts; however, during shipment, some bolts may
vibrate loose. We have no control over the handling our
compressed air systems receive after leaving our factory. To
prevent costly problems at start-up and operation, all bolts
should be checked for tightness prior to system pressurization.
This will assure gasket life as well as prevent possible gasket
blowout. Gasket joints should be bubble tested after four or
five complete cycles of the dryer, to ensure gaskets are
sealed. Any loose joints will need to be re-tightened and re-
tested for leaks. Following is a comprehensive procedure for
tightening all pressurized gasketed joints. If the dryer includes
manual butterfly valves, valves must be totally closed before
re-torquing bolts.
