-10
-5
0
5
10
15
20
-20
7
-10
0
10
20
30
40
50
60
A
B
C
D
G
E
F
2,5
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
temper
atur
e [°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 (opti55°C)
Min chilled water inlet temp.
-5°C
Max chilled water inlet temp.
+20°C
Max chilled water pressure
10 bar
