TurboChill™
Chillers
21
TurboChill Water Cooled Technical Manual 9216326 V1.10.0 06_2017
Integrated Optimised Loading and Offloading Sequence
A sequence light control algorithm has been integrated into the unit strategy which will allow operation of up to 4
modules (circa 1.5MW). The loading sequence has also been optimised to maximise system EER for a given load,
where multiple TCW modules will share the load evenly when possible.
As a single module ramps up to 60% demand, the second module becomes active and ramps up to 30% (minimum).
As it does this, the first module shall ramp down to 30%, to share the load. This same process can be continued up to
8 modules. Once all modules are active they will load up equally as the system load increases. This loading strategy
simply allows each module to operate at part load demand as much as possible, maximising efficiency.
Offloading occurs via the process described above, in reverse. All modules shall ramp down from 100% equally to the
minimum possible demand (for each module), and then as one module is switched off the remaining modules ramp up
to make up the difference to maintain a smooth reduction in cooling capacity. This strategy is continued until the system
is at its minimum cooling capacity represented by one module at its minimum demand.
Introduction
