Sullair RD Series, User & Service Manual

Page: 43 / 268

SECTION 3 PRODUCT USER MANUAL
43
3.7 INSTALLATION LAYOUT
REQUIREMENTS
1. The dryer must be installed horizontally. A
minimum of at least 1 ½ feet clearance
around the dryer is necessary to allow free
air circulation and easy access for servicing.
2. The ambient temperature in the room
should not exceed 120° F and should not
be below 40° F, taking into account the
heat radiated by the dryer. (About 18 watts
for each SCFM under ISO 7183-5 condition
or 40 watt for each liter/sec under ISO 7183-
A condition).
3.8 ENVIRONMENTAL
PROTECTION
1. US/EU laws protect the environment against
refrigerant being released into the atmo-
sphere.
2. An annual leak control test at less than 5.0
gr/year should be performed by a qualified
engineer if the refrigerant dryer contains
more than 4.4 lbs/ 2 kg of refrigerant. This
control test has to be done twice a year if the
dryer contains more than 66 lbs/30 kg.
3. Prior to dryer disposal, the refrigerant must
be properly recovered by a qualified engi-
neer.
3.9 PRODUCT DESCRIPTION
This refrigerated compressed air dryer has been
designed to remove water vapor from industrial
compressed air that is free of any aggressive
contaminants like ammonia, gaseous acid, dust, rust,
liquid condensate, any other chemical or mineral
substances capable of attacking or clogging the heat
exchanger(s).
The optional, water-cooled condenser is not
designed for use with seawater or water containing
aggressive contaminants.
Please contact your factory representative for further
questions on this issue. This dryer has been
designed for indoor operation only.
The minimum and maximum values stated must be
observed, as well as the safety precautions
described in this manual.
3.10 PRODUCT FEATURES
3.10.1 R
EFRIGERANT COMPRESSOR
The refrigerant compressor is fully hermetically
sealed and requires no maintenance.
3.10.2 C
ONDENSER
1. Air cooled models: The refrigerant con-
denser is equipped with fans that are cycled
on and off to maintain a minimum high side
pressure.
2. Water-cooled dryers Utilize a water control
valve piloted by a sensing bulb that reacts to
the high side refrigerant pressure control-
ling the water flow Maintain a minimum high
side pressure.
3.10.3 R
EFRIGERANT CIRCUIT PROTECTION
1. Overload protector :
Single phase compressors are equipped
with an overload protector which is a current/
temperature switch that reacts to the motor
winding amps and temperature of the com-
pressor motor. When the switch detects a
high current or a high temperature condition
with the compressor motor it opens causing
loss of voltage to the compressor. This
switch automatically resets as the motor
cools down to a factory preset temperature.
This cool down period can take as long as 8
hours. A warning lamp will light to indicate
that the protector has tripped.
2. High/Low pressure safety switch :
Refrigerant circuits are protected against
excessive pressure by a safety switch that
stops the compressor in cases of high or low
refrigerant pressure. If this safety switch has
tripped out on high refrigerant pressure, it
has to be manually reset before the dryer
can be restarted. A low pressure trip will
automatically reset.
3.10.4 F
ILTER
D
RIER
Total water removal in the refrigerant circuit is
achieved by a filter drier who also traps any solid
particles that may have migrated into the circuit
during assembly.