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10.3 OPERATION FIELD (COOLING)
35
30
25
(2)
20
15
°C
10
10
15
20
WET BULB TEMPERATURE - EXAMPLE
24°C D.B. / 63% R.H.
1 9°C W.B.
26°C D.B. / 52% R.H.
27°C D.B. / 48% R.H.
OPERATION FIELD (HEATING)
35
30
25
(2)
(1)
20
15
10
0
5
10
15
WARNING: THE GRAPH REFERS TO A WATER TEMPERATURE
DIFFERENTIAL OF 5°C. WITH A REDUCED WATER FLOW RATE, THE
TEMPERATURE DIFFERENTIAL IS MORE THAN 5°C, SO IT IS NECESSARY
TO REDUCE THE SPECIFIED OPERATING RANGE FOR STEPS EXCEEDING
THE NOMINAL 5°C.
EXAMPLE:
WITH A TEMPERATURE DIFFERENTIAL OF 8°C, THE LOWER TH
NO LONGER 10°C, BUT 13°C.
10 - INFORMATIONS TECHNIQUES
(1)
25
30
35
40
T H
O [°C]
2
°C
(3)
20
25
30
35
40
45
T H
O [°C]
2
O LIMIT IS
2
THE LIMITS ARE MEANT AS AN INDICATION. PLEASE NOTE THAT THEY
HAVE BEEN CALCULATED BY CONSIDERING:
GENERAL AND NOT SPECIFIC SIZES,
−
STANDARD AIR FLOW RATE (FAN AVERAGE SPEED),
−
NON-CRITICAL POSITIONING OF THE UNIT AND CORRECT
−
MAINTENANCE OF THE UNIT ITSELF,
−
OPERATION AT FULL LOAD
−
WATER TEMPERATURE DIFFERENTIAL = 5°C
TA = TEMPERATURE OF THE AIR ENTERING INSIDE
THE TREATMENT COIL (°C)
WARNING!
WET BULB TEMPERATURE
(W.B. = WET BULB)
TH2O = WATER TEMPERATURE AT PLATE EXCHANGER INPUT (°C)
1 = STANDARD OPERATING RANGE
45
50
2 = OPERATING FIELD FOR UNIT EQUIPPED WITH 'V2MODX - 2-WAY
MODULATING VALVE FOR INSTALLATION WITH DISPOSABLE WATER'
OPTION, I.E. WELL WATER, AQUEDUCT, GROUNDWATER OR ANYWAY
A SOURCE AT LOW WATER TEMPERATURE. BY THIS OPTION THE
WATER FEEDING SYSTEM MUST BE AT VARIABLE FLOW.
WARNING: THE GRAPH REFERS TO A WATER TEMPERATURE
DIFFERENTIAL OF 5°C. WITH A REDUCED WATER FLOW RATE, THE
TEMPERATURE DIFFERENTIAL IS MORE THAN 5°C, SO IT IS NECESSARY
TO REDUCE THE SPECIFIED OPERATING RANGE FOR STEPS EXCEEDING
THE NOMINAL 5°C
EXAMPLE:
WITH A TEMPERATURE DIFFERENTIAL OF 8°C, THE UPPER TH
NO LONGER 45°C BUT42°C
THE LIMITS ARE MEANT AS AN INDICATION. PLEASE NOTE THAT THEY
HAVE BEEN CALCULATED BY CONSIDERING:
−
GENERAL AND NOT SPECIFIC SIZES,
STANDARD AIR FLOW RATE (FAN AVERAGE SPEED),
−
NON-CRITICAL POSITIONING OF THE UNIT AND CORRECT
−
MAINTENANCE OF THE UNIT ITSELF,
OPERATION AT FULL LOAD
−
WATER TEMPERATURE DIFFERENTIAL = 5°C
−
TA = TEMPERATURE OF THE AIR ENTERING INSIDE
THE TREATMENT COIL (°C)
WARNING!
DRY BULB TEMPERATURE
(D.B. = DRY BULB)
TH
O = WATER TEMPERATURE AT PLATE EXCHANGER INPUT (°C)
2
50
1 = STANDARD OPERATING RANGE
2 = OPERATING RANGE FOR SYSTEM WITH GLYCOL WATER (TO PREVENT
THE RISK OF FROST)
3 = STANDARD UNIT OPERATING RANGE. IN THIS RANGE, THE EFFICIENCY
(COP) CAN BE INCREASED BY FITTING THE UNIT WITH THE 'V2MODX -
TWO-WAY MODULATING VALVE FOR SYSTEMS WITH DISPOSABLE
WATER' OPTION, WHICH CONTROLS THE HEAT EXCHANGE WITH THE
SOURCE. THIS WAY, THE PERFORMANCE OF THE UNIT IS SIMILAR TO
THE PERFORMANCE OF THE SAME UNIT WITH A SUPPLY WATER
TEMPERATURE (TH
SUPPLY SYSTEM WITH A VARIABLE FLOW RATE.
O) OF 25°C. THIS OPTION REQUIRES A WATER
2
O LIMIT IS
2
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