UK BIGRAC GEN 26 LR - Flipbook - Page 52
GENERAL
PACi NX Water Heat Exchanger (WHE) is the ideal solution for residential and commercial
applications; the investment costs can be amortised in a short period.
Easy maintenance operation from two points of access
Removable lid for
electrical installation
Antifreeze
Sensor
Electrical Box
Integrated Control
display
Rear differential pressure
switch for BPHE safety
Plate heat exchanger with
optimised distributor for
R32 refrigerant
Completely
removable
metallic case:
full access for
maintenance
Integrated cascade control as standard for maximum ease and flexibility
Built-in cascade control for 2 units.
The control of 2 refrigerant systems can be combined
together in a cascade. This option is included in the
standard scope of delivery on the WHE. It is activated
using the one of the CZ-RTC5B remote controllers on the
units as master. Rotation and Backup operation modes
can be selected.
System 1
Operation
Stand by
Operation
Stand by
Operation
System 2
Stand by
Operation
Stand by
Operation
Stand by
System 1
Operation
System 2
Stand by
Power supply error or PCB error
System 1
System 2
System 1
Operation
Error
System 2
Stand by
Operation
*One of built-in controllers should be deactivated.
PACi NX Water Heat Exchanger can be connected as a cascade with up to 4 groups of 8 units, reaching up to 800 kW
Optional PAW-PACR4 cascade controller allows up to four
groups, with each group containing between 1-8 units, to
be combined into a cascade for failure substitution or
temperature assist.
Example: 4 x groups.
Maximum available capacity per group: 8 x 25 kW = 200 kW.
Total maximum available capacity: 4 x 200 kW = 800 kW.
Group 1
8 units
· Maximum 4 groups (up to 8 units per group)
· Rotation
· Failure substitution
· Temperature assist
· Operation output signal
· Alarm output signal
Temperature
sensor
Group 2
8 units
Group 3
8 units
Group 4
8 units
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