Condenser leaving water temperature, °C
COOLING
65
60
55
50
45
Part load operating limits (evaporator leaving
water temperature = 7°C)
Maximum condenser leaving water
temperature, °C
In part-load operation, the limitation of the condenser leaving
water temperature is due to the operating range of the screw
compressor. If the condenser leaving water temperature is
above the limit value given in the curves on the right, the unit will
automatically change over to the mode without heat recovery:
40
60
55
50
45
40
100
90
80
70
35
60
50
40
30
Unit load, %
30
25
20
0
5
10
Evaporator leaving water temperature, °C
15
Full load
Part load limit, approx. 60%
Minimum load limit, approx. 30%
Physical data, option 50
These are the same as for the standard unit except:
30XAS heat reclaim mode
282
342
442
482
Cooling capacity*
kW
278
329
428
475
Heating capacity*
kW
349
411
538
599
Total power input (unit)*
kW
77.7
90.2
120.6
136.0
Total energy efficiency ratio (EER)
kW/kW
3.58
3.65
3.55
3.49
Total coefficient of performance (COP)
kW/kW
4.49
4.56
4.46
4.40
Operating weight**
kg
3260
3320
4190
4280
Refrigerant charge
kg
73
78
90
95
55
68
68
Heat reclaim condenser
Water volume
Flooded shell-and-tube condenser
l
Water connection
55
Victaulic
Diameter
inch
4
4
4
4
Outside diameter
mm
114.3
114.3
114.3
114.3
* Nominal conditions: Entering/leaving water temperature: evaporator 12°C/7°C; heat reclaim condenser: 40°C/45°C; evaporator and heat reclaim condenser fouling factor = 0 m2 K/kW.
Gross performances, not in accordance with EN14511-3:2011. These performances do not take into account the correction for the proportional heating capacity and power input
generated by the water pump to overcome the internal pressure drop in the heat exchanger.
** Weights are for guidance only
164
C
A
R
R
I
E
R
2
0
1
6
/
2
0
1
7