CLIVET CKN-XHE2i 10.1, Инструкция по установке и эксплуатации, Страница: 57 / 66

Operating range (Cooling)
Operating range (Heating)
The limits are meant as an indication and they have been calculated by considering:
- general and non specific sizes,
- standard airflow,
- non-critical positioning of the unit and correct operating and maintenance of the unit,
- operating at full load
To verify the operation field of the operating units with percentages of external air, always
calculate the Tm mixing temperature at the internal heat exchanger input.
TM = INTERNAL EXCHANGER ENTERING AIR TEMPERATURE
temperature measured with wet bulb (W.B.=WET BULB)
TEXT = INLET AIR TEMPERATURE IN THE EXTERNAL EXCHANGER
dry bulb measured temperature (D.B.=DRY BULB)
Within the operating range, the unit can operate at a part load to maximaze the energy
efficiency
1. Standard operating range
2. Operation field of the unit in FREE-COOLING mode
WET BULB TEMPERATURE - EXAMPLE
The limits are meant as an indication and they have been calculated by considering:
- general and non specific sizes,
- standard airflow,
- non-critical positioning of the unit and correct operating and maintenance of the
unit,
- operating at full load
To verify the operation field of the operating units with percentages of external air,
always calculate the Tm mixing temperature at the internal heat exchanger input.
TM = INTERNAL EXCHANGER ENTERING AIR TEMPERATURE
temperature measured with wet bulb (W.B.=WET BULB)
TEXT = INLET AIR TEMPERATURE IN THE EXTERNAL EXCHANGER
dry bulb measured temperature (D.B.=DRY BULB)
Within the operating range, the unit can operate at a part load to maximaze the
energy efficiency
1. Standard operating range
2. Range in which the unit operation is allowed only for a limited period (max
1 hour)
In extended operating mode, in heat pump operation with an outdoor air
temperature of less than 6°C, the unit performs defrosts by reversing the cycle, so as
to eliminate the ice that forms on the surfaces of the outside exchanger; in addition,
in the event of negative temperatures, the water resulting from the defrosts must be
drained so as to avoid the accumulation of ice near the base of the unit. Make sure
that this does not constitute a danger for people or things.
With an outdoor air temperature between –10°c and –20°c install the following
options:
• 2 rows hot water coil
• Combustion module
• Electrical panel anti-freeze protection
5 CKN-XHE2i 7.1-14.2 M06K10A18-00