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Chillers
DeltaChill
TM
DeltaChill Technical Manual 9758541 V1.1_06_2020
Design Features & Information
Operating Limits
Standard Unit
Minimum ambient air DB
(1)
-20°C
Maximum ambient air DB at full load operation
(3)
40°C
Minimum supply water temperature
(2)
5°C
Maximum return water temperature
(4)
28°C
Maximum supply water temperature
(2)
20°C
Minimum / maximum ΔT
4K / 8K
(1) Temperatures lower than those stated can be obtained with the addition of glycol.
(2) Please refer to Airedale for conditions outside those quoted.
(3) Dependant on unit configuration performance may be reduced.
(4) With an 8K ∆T
ESEER Calculations
The quoted EER figures cover the performance of the unit ONLY at the standard rating conditions of 7/12°C water, 35°C
ambient. The ESEER (European Seasonal Energy Efficiency Ratio) calculation method has been developed by Eurovent
to give a single value that is a realistic indication of the efficiency of the chiller across the year round range of operation.
The ESEER value is calculated from the unit’s performance at 20, 25, 30 and 35°C ambient temperatures for 25, 50, 75
and 100% loading stages respectively, and with a fixed 7°C supply temperature.
The calculation below uses the Eurovent weighting coefficients and the part load EERs are determined in accordance
with EN14825:2018 Clause 4.4.
ESEER = A●EER
100%
+ B●EER
75%
+ C●EER
50%
+ D●EER
25%
A, B, C and D are weighting factors 0.03, 0.33, 0.41 and 0.23.
A
B
C
D
Temperature
35°C
30°C
25°C
20°C
Capacity Requirement
100%
73.7%
47.4%
21.1%
Weighting (Eurovent)
0.03
0.33
0.41
0.23
The waterside temperature should not go above the TS of +40°C. The PRV will release at water
temperatures >= 42.2°C.
CAUTION
