Checking The Minimum Flow; Setting The Screed Program Parameter (Only As Required); Re-Commissioning; Requirements - Daikin Altherma EHSX04P50D Installations- Und Wartungsanleitung

5

Start-up

INFORMATION
The activation of this function does not replace correct
venting of the heating circuit.
The heating circuit must be completely full before activat-
ing this function.
▪ Check the water pressure and replenish water if necessary
(see Chap. 7.2.2).
▪ Repeat the venting, checking and replenishing process until:
▪ it is completely vented.
▪ there is sufficient water pressure.
Fig. 5-2 Manual vent valves
5.1.4

Checking the minimum flow

The minimum flow must be checked with the heating circuit closed.
INFORMATION
If the minimum flow is too low, an error message may ap-
pear and the heating system may shut down.
If the minimum flow rate is not sufficient, there may be air
in the circulation pump or the valve drive of the 3-way
switching valves (3UVB1 / 3UV DHW) is defective.
▪ Vent the circulation pump.
▪ Check the function of the valve drives; replace the valve
drive if necessary.
▪ Close the valves and adjuster drives of all connected heat distribu-
tion circuits.
▪ Set the "Heating" operating mode on the Daikin Altherma EHS(X/
H) controller [→ Main menu → Operating mode].
▪ Read the [Actual flow rate] information parameter [→ Main menu
→ Info → Values].
▪ The flow rate must be at least 480 l/h (see Controller operating
instructions).
INFORMATION
The Daikin Altherma EHS(X/H) controller constantly monit-
ors the flow rate of the internal heat generator circuit. Dif-
ferent minimum flow rate values are required depending on
the active operating mode:
"Heating" operating mode: 480 l/h
"Cooling" operating mode: 660 l/h
Automatic thawing function (Defrost) active: 780 l/h
If an error message regarding an inadequate minimum flow
is displayed at a flow rate of more than 480 l/h, check the
actual flow rate in the active operating mode and eliminate
possible fault causes.
Installation and maintenance instructions
32
5.1.5 Setting the screed program parameter
(only as required)
In the screed program, the inflow temperature is controlled according
to a pre-set temperature profile.
See the Controller operating instructions for further information on
the screed program, its activation and sequence.
After the screed program has ended, the RoCon+ HP control unit
continues to work in the previously set operating mode. If not con-
figured beforehand, the following finishing work is necessary.
1 On connection without room station EHS157034:
– Set the heating characteristic curve or required inflow tem-
perature.
2 On connection with room station EHS157034:
– Activate the room station.
– Set the heating characteristic curve or required inflow tem-
perature. If necessary, set the [Room Influence] parameter
[→ Main menu → Configuration → Heating] and set the tar-
get room temperature.
5.2

Re-commissioning

5.2.1

Requirements

CAUTION
Start-up in frosty conditions can result in damage to the en-
tire heating system.
▪ Start-up at temperatures below 0 °C only if a water tem-
perature of at least 5 °C is guaranteed in the heating
system and the storage tank.
▪ We recommend not to operate the installation in ex-
tremely frosty conditions.
▪ The Daikin Altherma EHS(X/H) is fully connected.
▪ The refrigerant system is dehumidified and filled with the specified
amount of refrigerant.
▪ The heating and hot water system has been filled and pressurised
to the correct pressure (see Chap.
▪ The storage tank is filled up to the overflow
7.2.2).
(see Chap. 7.2.1).
Daikin Altherma EHS(X/H)
Daikin Altherma integrated solar unit
008.1444099_00 – 07/2018 – EN