Sullair 1000-DBP, User & Service Manual

Page: 19 / 84

Section 4
19
DBP BLOWER PURGE HEATED DRYER
INSTALLATION
The dryer should be installed on a level location that
is selected to provide easy access to all parts of the
system to ensure future ease of service.
Care should be taken during the location selection to
ensure that there is enough space provided so that
all future maintenance and service can be performed
efficiently.
Ensure that the inlet and outlet connections to the
dryer are made with flanges the correct size and
pressure rating.
Ensure that the electrical service to the dryer is
suitable for the equipment requirements as listed in
Section 3.6 of this manual.
It is recommended that the dryer “regeneration air
outlet connection” or “purge exhaust connection” be
piped to the outside of the building. This ensures that
the moisture adsorbed in each drying period is not
released into the building as the equipment operates.
Since the regeneration blower is a very “low”
pressure device it is critical that the regeneration air
outlet piping is adequately sized. This will prevent
“back pressure” that reduces the blower delivery
volume and consequently the regeneration
efficiency. A good rule of thumb that governs the pipe
size used is as follows:
• Up to 10 feet long use the same size pipe
as the regeneration air outlet connection.
• Up to 20 feet long use one size bigger pipe.
• Up to 50 feet long use two sizes bigger
pipe.
DO NOT use plastic pipe as the exhaust
temperatures may reach 300 degrees F. or hotter.
It is important that the operating conditions listed in
the “
Specifications ” are observed. Failure to do so
may result in premature failure of the desiccant due
to low operating pressure or high inlet temperatures.
Do not place the dryer into process service until they
has been fully regenerated on both vessels, the
operating cycle in the PLC has been verified and the
system is at the correct operating pressure.
If the system pressure cannot be maintained in the
adsorption vessel during drying a system pressure
holding valve is required to protect the dryer from
high velocities which are the result of low service
pressure. The pressure holding valve must be
installed downstream of the dryer system. Failure to
maintain the correct operating pressure may lead to
dewpoint failure.
If there are any changes in the operating conditions
of the system from those listed in the
“
Specifications ” section please contact customer
service department for advice on any necessary
system adjustments.