RG66004288-09
all copying, even partial, of this manual is strictly forbidden
15
7 CALCULATION FACTORS
7.1
CHANGE IN OPERATING PARAMETERS WITH DT OTHER THAN 5°C
after identifying the unit’s performance in the terms of the desired outlet water temperature, correct the value by multiplying it by
the following corrective coefficients.
Difference between water inlet
temperature and water outlet
temperature
Corrective coefficient of cooling/
heating capacity
Correction coefficient of
electrical input
Correction coefficient of water
flow rate
Correction coefficient of pressure
drop
3
0,975
1
1,63
2,64
4
0,990
1
1,24
1,53
5
1,000
1
1,00
1,00
6
1,015
1
0,85
0,72
7
1,030
1
0,74
0,54
8
1,040
1
0,65
0,42
7.2
WATER AND GLYCOL MIXTURE
Based on the minimum outlet water temperature, you can derive the percentage of ethylene glycol and the corrective coefficient
using the table below.
Percentage of ethylene glycol (%)
0%
10%
20%
30%
40%
Minimum temperature of water produced (°C)
5
2
-5
-10
-15
Mixture freezing temperature (°C)
0
-4
-14
-18
-24
Capacity correction factor
1
1,00
0,99
0,99
0,98
Water flow rate correction factor
1
1,05
1,09
1,14
1,20
Pressure drop correction factor
1
1,16
1,35
1,58
1,86
IMPORTANT!
The use of propylene glycol is not admitted with standard pumps. For further information, contact the manufac-
turer.
Summary of Contents for HPE 018
Page 1: ...TECHNICAL MANUAL RPE 19 44 HPE 18 40 Chillers and heat pumps RPE 19 44 HPE 18 40...
Page 2: ...ORIGINAL INSTRUCTIONS The water chillers and heat pumps comply with directive 2014 68 EC PED...
Page 28: ...RG66004288 09 All copying even partial of this manual is strictly forbidden 29 RPE 18 27...
Page 29: ...30 RPE HPE 28 40...
