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the number of free starts is programmed to "1", and
the Start to Start Time Setting is programmed to
20 minutes, then the compressor will be allowed one
start every 20 minutes. The start-to-start time is the
time from when the motor was commanded to
energize to when the next command to enter prestart is
given.
C C l l e e a a r r R R e e s s t t a a r r t t I I n n h h i i b b i i t t . . A Clear Restart Inhibit "button"
is provided within Manual Override in Settings on the
Tracer® AdaptiView™ display. This provides a way for
an operator to allow a compressor start when there is a
currently active Restart Inhibit that is prohibiting such a
start. The "button" press will have no other function
than to remove the restart inhibit if there is one active.
It does not change the count of any internal restart
inhibit timers or accumulators. The restart inhibit
function, setpoints, and clear features exist for each
compressor and operate independently of other
compressors on that chiller. During the time the start is
inhibited due to the start-to-start timer, the Tracer®
AdaptiView™ shall display the mode "Restart Inhibit"
CDHF-SVX01N-EN
and the also display the time remaining in the restart
inhibit. A "Restart Inhibit Invoked" warning diagnostic
will exist when the attempted restart of a compressor is
inhibited.
Oil and Refrigerant Pump
Compressor Lubrication System
A schematic diagram of the compressor lubrication
system is illustrated in the following figure. (This can
be applied to Circuit 1 or Circuit 2.) Oil is pumped from
the oil tank (by a pump and motor located within the
tank) through an oil pressure regulating valve designed
to maintain a net oil pressure of 18 to 22 psid (124.1 to
151.7 kPaD). It is then filtered and sent to the oil cooler
located in the economizer and on to the compressor
motor bearings. From the bearings, the oil drains back
to the manifold and separator under the motor and
then on to the oil tank.
O O p p e e r r a a t t i i n n g g P P r r i i n n c c i i p p l l e e s s
71
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