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9.3 OPERATING LIMITS
Unit limits in COOLING
Unit limits in HEATING
9 - TECHNICAL INFORMATION
(1) Data referred to the following conditions:
water to internal exchanger 30/35°C
outdoor air temperature +7°C DB; +6°C WB
(2) Data referred to the following conditions:
water to internal exchanger 30/35°C
outdoor air temperature +2°C DB; +1°C WB
(3) Data referred to the following conditions:
water to internal exchanger 23/18°C
outdoor air temperature: +35°C DB; 50% RH
(4) efficiency in accordance with EUROVENT documentation “Rating Standard for
Liquid Chilling Packages” 6/C/003-2006, also considering possible defrost cycles.
Total input is obtained from the compressor input and fan input.
(5) ESEER = European Seasonal Energy Efficiency Ratio. Water outlet = 7°C
(6) The sound pressure at 10 m from the external surface of the unit in open field
conditions, in accordance with EN 3744.
(7) approximate values
(8) PHE = plates
(9) AX = axial-flow fan
COOLING
EXTERNAL EXCHANGER
Max air intake temperature
1
°C 43 43 43 43 43 43 43
INTERNAL EXCHANGER
Max water outlet temperature
2
°C 18 18 18 18 18 18 18
Min water outlet temperature
2
°C 4 4 4 4 4 4 4
HEATING
EXTERNAL EXCHANGER
Max air intake temperature
3
°C 40 40 40 40 40 40 40
Min air intake temperature
4
°C -15 -15 -15 -15 -15 -15 -15
INTERNAL EXCHANGER
Max water outlet temperature
5
°C 60 60 60 60 60 60 60
Min water outlet temperature
6
°C 23 23 23 23 23 23 23
ATTENTION: IN CASE OF PREDOMINANT WINDS, WINDBREAK BARRIERS ARE
NECESSARY.
difference between inlet / outlet water temperature = 5°C
(1) water to internal exchanger =12/ 7°C
(2) external heat exchanger inlet air 35°C D.B.
(3) data referred to still air and operation with air flow rate in modulation (maximum
outlet water temperature 52°C)
(4) water to internal exchanger 40/45°C
(5) outdoor air temperature = 0°C DB; 88% RH
(6) minimum temperature of heat exchanger inlet water 14°C for a maximum of 15
minutes, thanks the to flow rate variation device of the circulator pump.
SIZES 21 25 31 41 51 61 81
Tw [°C] = heat exchanger outlet water temperature
Ta [°C] = dry bulb air temperature difference between inlet / outlet water
temperature = 5°C
The limits are indicative and have been calculated considering:
- values general and not specifications,
- clean coil without frost,
- non-critical positioning and correct use of the unit,
- operation at full load.
(1) The shaded area shows operation with air flow rate in modulation
Tw [°C] = heat exchanger outlet water temperature
Ta [°C] = dry bulb air temperature (R.H. = 50%)
difference between inlet / outlet water temperature = 5°C
The limits are indicative and have been calculated considering:
- values general and not specifications,
- clean coil without frost,
- non-critical positioning and correct use of the unit,
- operation at full load.
(1) The shaded area shows operation with air flow rate in modulation
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