2
Technical data
2.1 Unit data KWK 125-255 -ZW
Series
KWK 125
ZW
KWK 165
ZW
KWK 205
ZW
KWK 255
ZW
Operating mode
Chilled water units for wall and ceiling mounting, 2-con-
ductor version
Nominal cooling output
1)
kW
1.20
1.63
2.09
2.51
Nominal heat capacity
2)
kW
1.49
2.02
2.42
2.87
Application area (room volume),
approx.
3)
m
3)
40
50
60
80
Operating range - indoor unit
°C
+15 to +35
Air flow volume per stage
m
3
/h
120/200/260 140/220/290 190/290/370 210/320/410
Sound pressure level per stage
3)
dB (A)
17/25/32
23/31/39
Sound power level per stage
dB (A)
25/33/40
31/39/47
Power supply
V/Ph/
Hz
230/1~ /50
Enclosure class
IP
X0
Electrical rated power consumption
1)
W
35
39
47
51
Electrical rated current consumption
1)
A
0.15
0.17
0.20
0.22
Operating medium
max. 35% ethylene glycol, max. 35% propylene glycol
Operating limits, medium - cooling
°C
+4 to +18
Operating limits, medium - heating
°C
+35 to +80
Operating pressure, medium, max.
kPa
1500
Nominal flow rate, medium - cooling
1)
m
3
/h
0.21
0.28
0.36
0.43
Nominal flow rate, medium - heating
2)
m
3
/h
0.26
0.35
0.42
0.49
Rated press. drop, internal - cooling
1)
kPa
10.5
13.3
15.3
17.3
Rated press. drop, internal - heating
2)
kPa
13.0
16.5
17.7
19.7
Medium connection, inlet
Inches
1/2
Medium connection, outlet
Inches
1/2
Medium volume
l
0.7
1.0
Condensate drainage connection
mm
20
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