Dual Chiller Control For Parallel Applications - Carrier AQUAFORCE 30XA080-500 Controls, Start-Up, Operation, Service And Troubleshooting Instructions

Lead compressor can fall anywhere in this area
100
when load between 40%~65%
80
LOADING
60
40
20
0
0
100
80
60
40
20
0
0
For units with a Touch Pilot display, two additional steps
must be completed to start the machine. On the master chiller,
the Master Control Type must be configured for the start con-
trol defined in the Machine Control configuration. To start the
machines, the master chiller must be started with the Start/Stop
button and Master Mode selected. The slave chiller must be
started with the CCN Mode selected.
Each application, Parallel and Series, are described sepa-
rately below.
Lag compressor can fall anywhere in this area
when load between 40%~65%
Load (%)
Equal Circuit Loading
Compressor Loading Unloading (Staged circuit loading)
Staged Circuit Loading
Fig. 21 — Compressor Loading and Unloading
33
UNLOADING
100
100
Load (%)
DUAL CHILLER CONTROL FOR PARALLEL APPLI-
CATIONS — To configure the master chiller for parallel
applications using the Touch Pilot display, see Table 28. To
configure the master chiller for parallel applications using the
Navigator display, see Table 29.
To configure the slave chiller for parallel applications using
the Touch Pilot display, see Table 30. To configure the slave
chiller for parallel applications using the Navigator display, see
Table 31. A power cycle is required for the values to take
effect.
Lead Compressor Loading
Lag Compressor Loading
Lead Compressor Unloading
Lag Compressor Unloading
0
a30-4466
Lead Compressor Loading
Lag Compressor Loading
Lead Compressor Unloading
Lag Compressor Unloading
0
a30-4477