Carrier 19 Series - Manual (Page 10)

Additional energy-saving options
Chilled water self-reset control
This device permits the leaving chilled water tempera­
ture to rise as the load on the machine decreases.
The higher the leaving chilled water temperatures, the
less work the compressor is forced to do.
The power monitor control
An electronic, energy-saving device which continuously
monitors building electric demand and sheds preselected
loads in stages during peak power usage periods. The
power monitor control reduces power consumption and
minimizes power demand charges.
Chilled water reset-dual input
A device that causes the leaving chilled water tempera­
ture control set point to change in proportion to a change
in a remote temperature such as return chilled water or
outdoor air temperature.
Adjustable stepped-rcset control
A device that permits leaving chilled water tempera­
ture to rise in predetermined adjustable steps. Operator
is in control of demand limit so amount of reset is not
dependent on machine load but on the amount of change
of resistance in the probe circuit.
Stepped power demand limiter
This option makes it possible to limit power demand in
four ways:
1. At start-up each chiller can be held to a preselected
maximum current draw for any time period of up to
one hour.
2. During normal operation, chiller load can be auto­
matically reduced in up to 3 stages in response to
increased total building power consumption.
Chiller demand can semi-automatically be lowered in
a single stage in response to increased total building
power consumption.
Chiller demand can also be lowered manually.
Stepped power demand limiter minimizes the likeli­
hood of getting demand charges. Also has timer which
increases flexibility of operator. Operator can change
demand limit without being at controls and can also
adjust demand limit manually.
3.
4.
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