Stulz Explorer WPA - 5. Technical Data; 5.1 Application limits; 5.1.1 Storage conditions; 5.1.2 Operating conditions

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34 EN/06.2016/i01 © STULZ S.p.A. – all rights reserved
WPA EXPLORER ORIGINAL INSTRUCTIONS
5. Technical Data
5.1 Application limits
The STULZ Explorer WPA units are provided for operations within the following ranges:
DWT - Water outlet temperature [°C] with ∆T = 5 K
AT - Outside air temperature [°C]
Standard water
Only with antifreeze mixture (glycol)
Only with antifreeze mixture (glycol)
Only in free cooling mode
Unloading area (reduced capacity)
Special application
Setting of the safety devices
High pressure limiter 33 barg
Safety high pressure limiter 40.5 barg
Low pressure switch 2.4 barg
High pressure safety valve 45 barg
Type of network TT; TN-S ; TN-C-S
Voltage 400 V / 3ph / 50Hz ; PE
Voltage Tolerance ± 10 %
Frequency Tolerance ± 1 %
Rated ultimate short- circuit
breaking capacity
10 kA
Temperature difference 4 - 8 K
Max. glycol content ethylenic 40 %
propilenic 45 %
DANGER
Install upstream of the chiller adequate protection against indirect contact, respecting the
requirements of CEI 64-8, unless other specification by local regulations.
5.1.1 Storage conditions:
Temperature -5°C ÷ +45°C
Humidity 5 ÷ 95 % rel. h.
5.1.2 Operating conditions:
Min outdoor temperature -18°C (optionally -40°C)
Max outdoor temperature +45°C (optionally +55°C)
Min chilled water inlet temp. -5°C
Max chilled water inlet temp. +20°C
Max chilled water pressure 10 bar