2.7.7.2
Monitoring Capabilities
During normal operations, the control system shall be capable of monitoring
and displaying the following operating parameters. Access and operation of
display shall not require opening or removing any panels or doors.
a.
Entering and leaving chilled water temperatures
b.
Entering and leaving condenser water temperatures
c.
Refrigerant and solution temperatures
d.
Generator pressures and temperatures
e.
Self diagnostic
f.
Operation status
g.
Operating hours
h.
Number of starts
i.
Number of purge cycles over the last 7 days
2.7.7.3
Programmable Setpoints
The control system shall be capable of being reprogrammed directly at the
unit. No parameters shall be capable of being changed without first
entering a security access code. The programmable setpoints shall include
the following as a minimum.
a.
Leaving Chilled Water Temperature
b.
Leaving Condenser Water Temperature
c.
Time Clock/Calender Date
2.7.7.4
Safety Controls with Manual Reset
Chiller shall be provided with the following safety controls which
automatically shutdown the chiller and which require manual reset.
a.
Refrigerant or solution pump thermal or current overload
b.
Low refrigerant temperature
c.
Loss of chilled water
d.
Loss of condenser water
e.
High or low condenser water temperatures
f.
Power failure
g.
Generator high temperature or pressure
h.
Low solution level
i.
[Burner or related combustion malfunction]
SECTION 15620A
Page 40
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