DeDietrich AWHP-2 MIT-IN-2 iSystem Installation And Service Manual page 92

5. Commissioning
1
2
3
90
6
5
4
A B
n Power cut off (EVU)
C
EVU
Circulator
A
EVU power cut off timer program
Z
Compressor
E
Outside temperature
R
Temperature set point
T
Temperature OFFSET EVU (0 to 20 K)
Y
A
Phase A (¼See below)
B
Phase B (¼See below)
C
Phase C (¼See below)
EVU function
EVU
Phase A Normal operation according to the DHW and ECO /
COMFORT timer programme.
Phase B Start-up of the EVU timer programme. The set point temperature
on the inside module is increased by the value shown in the
OFFSET EVU parameter as long as the EVU timer programme
is active and the EVU signal is absent (the EVU contact is
closed). Domestic hot water production can only be handled if
the tank has an electrical resistor.
Phase C Presence of the EVU signal (the EVU contact is open). The
outside module, the back-ups and the heating pumps on the
inside module are powered down. The secondary pumps
continue to run as long as the circuits concerned are required.
No DHW production enabled.
AWHP-2 MIT-IN-2 iSystem
A
25/06/2014 - 7616371-001-04
M002702-A