Cetetherm AquaEfficiency
Installation, service and operating instruction
37
Parameter
Factory
Default
Setting
Optional setting
Description
DeltaTS1S2 SpdP3P4
8°C
3…20
When the value S1-S2 is below 8° the
signal sent to charging pump start to
reduce.
P band DT(S1-S2)
5°C
4…20
Proportional value of the control
DZ_GS2 enk/s
2
0-20
Anticipation on ctrl valve+prim.pump
signal, depending of temperature
gradient on S2 (ex: quick temp. Loss if
tapping =open ctrl valve + accelerate
primary pump to save HE+S1 time cst)
Reversed output S2
0
Set 1 if cooling
mode
Reverse anticipation action for cooling
mode only)
MinSpeed P3P4
25
10
– 100%
Minimal speed if DHW setpoint almost
reached (secondary charging pumps
only)
11.6 Delta T (S3-S2) Menu
“Efficiency”
This function limits the primary return temperature, acting on primary pump signal (speed). It acts like a setting
limit valve, limiting the primary flow rate by minimize the signal send to the pump taking care of the differences
S3-S2.
The 0-10V signal sent to the primary pump is the minimum of the signal coming from S1 and the signal coming
from the
ΔT (S3-S2).
Parameter
Factory
Default
Setting
Optional setting
Description
Delta T(S3-S2)
15K
0-100°C (keep
around 25)
Delta T control loop to influence the
primary return temp.
For a little impact on Delta T control
loop, set >20.
BP Delta T S3-S2
80K
Do not change
Value 0-100°C. Big value=smooth
influence
Intégral DT S3-S2
60 sec
Do not change
Value 0-200. Big value=Low influence
Lim S3-S2
N/A
Read only
Indicates the DeltaT(S3-S2) function
influence. If <0 : No influence.
If >0, reduce the primary pump speed of
indicated value
11.7 S4 menu primary inlet sensor
If a sensor S4 is connected at the primary inlet, this function can be activated. When temperature suddenly
increases or decreases, an action signal is sent to the control valve and primary pump(s) speed.
Parameter
Factory
Default
Setting
Optional setting
Description
DZ-GS4
2
Do not change
Anticipation on ctrl valve+prim.pump
signal, depending of temperature
gradient on S4 (ex: boiler temp. Loss if
tapping.
Reversed Output S4
0
Set 1 if cooling
mode
=open ctrl valve + accelerate primary
pump to save HE+S1 time cst) reverse
anticipation action (for cooling mode
only)
