Daikin Altherma EHYHBH05A Series - Page 175

10 | Configuration
Installer reference guide
175
EVLQ05+08CA + EHYHBH05A + EHYHBH/X08A + EHYKOMB33AA
Daikin Altherma hybrid heat pump
4P355634-1G – 2022.09
Pump speed limitation
Pump speed limitation [9‑0D] defines the maximum pump speed. In normal
conditions, the default setting should NOT be modified. The pump speed limitation
will be overruled when the flow rate is in the range of the minimum flow (error
7H).
In most cases, instead of using [9-0D], you can prevent flow noises by performing
hydraulic balancing.
# Code Description
N/A [9‑0D] Pump speed limitation
▪ 0: No limitation.
▪ 1~4: General limitation. There is limitation in all
conditions. The required delta T control and
comfort are NOT guaranteed.
- 1: 90% pump speed
- 2: 80% pump speed
- 3: 70% pump speed
- 4: 60% pump speed
▪ 5~8 (default: 6): Limitation when no actuators.
When there is no heating/cooling output, the
pump speed limitation is applicable. When
there is heating/cooling output, the pump
speed is only determined by delta T in relation
to the required capacity. With this limitation
range, delta T is possible and the comfort is
guaranteed.
During sampling operation the pump runs for a
short time to measure the water temperatures,
which indicate if operation is required or not.
- 5: 90% pump speed during sampling
- 6: 80% pump speed during sampling
- 7: 70% pump speed during sampling
- 8: 60% pump speed during sampling
The maximum values depend on the unit type:
[9-0D]=0 [9-0D]=1/5
a (kPa)
b (l/min)
a (kPa)
b (l/min)