Aisin AXGP224E1, Technical Manual, Page: 113 / 126

17
Example modulation in cooling:
The set point temperature in cooling, ie the parameter "Tset cool", may vary in a range between
6°C and 15°C.
The factory settings are:
Tset cool= 8°C;
Modulation Range = 5°C
AWS Capacity
[%]
Tset cool [°C] Modulation
Range [°C]
Max. Temperature
Modulation [°C]
Outlet
Temperature [°C]
100
A ∆ T
A +
∆
T
A - 1
75 (A + ∆ T) - ( ∆ T•0,25)
50 (A + ∆ T) - ( ∆ T • 0,5)
25 (A +
∆
T) - (
∆
T•0,75)
Numerical example on the minimum temperature set point
100
6 5
11
5
75 9,75
50 8,5
25 7,25
Numerical example on the maximum temperature set point
100
15 7
22
14
75 20,25
50 18,5
25 16,75
The YOHSI AWS TWIN unit proper operation foresees the following capacity modulation method of
the two GHP units:
■ Two GHP units at 100% of their load;
■
Two GHP units at 75% of their load;
■
Two GHP units at 50% of their load;
■
One GHP unit at 50% of its load;
■
One GHP unit at 25 % of its load.
10.2 Setting the offset
The unit YOSHI AWS allows you to adjust the offset of the set point temperature, that is the return
water temperature on the primary circuit. The parameters "Tset Offset " can be changed in the user
menu, (please refer to the AWS service manual). If the optional "Controller Plus" has been installed,
of the offset measurement will be made by its active probe, installed on the buffer tank.
The factory settings are:
Heat Tset Offset = 2°C
Cool Tset Offset = 2°C