Start-Up; Requirements; Commissioning At Low Ambient Temperatures; Bleeding The Hydraulic System - Daikin Altherma 3 H HT ECH2 O Referenzhandbuch Für Den Monteur

5

Start-up

5 Start-up
INFORMATION
Read chapter "General safety precautions" thoroughly be-
fore carrying out the steps described here.
INFORMATION
If the outdoor unit has been disconnected from the power
supply for an extended period of time or the indoor unit
was operated before the outdoor unit for an extended
period of time, the indoor unit must be restarted to estab-
lish communication between the units. Without communic-
ation, the outdoor unit is not used to generate heat.
5.1

Requirements

▪ The indoor unit 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 (see
▪ Optional accessories have been installed and connected up.
▪ The heating system's control valves are open.
5.2 Commissioning at low ambient
temperatures
At low ambient temperatures, the safety settings of the indoor unit
may prevent heat pump operation. In such cases, an external heat
generator is required to temporarily raise both the storage and return
temperatures of the heating network.
Minimum storage temperatures for heat pump operation:
Ambient temperature < -2 °C: 30 °C
Ambient temperature < 12 °C: 23 °C
The following steps must be performed:
With electrical backup heater:
1 Parameter [Heating support (HZU)]: "On" select [→ Main menu
→ Settings → ISM]
2 Parameter [Config. ext. heat source]: "Backup heater BUH" se-
lect [→ Main menu → Settings → Ext. source]
3 Parameter [External power hot water]: Select maximum output of
backup heater [→ Main menu → Settings → Ext. source]
4 Parameter [1 x hot water]: "On" select [→ Main menu → User
→ 1x load]
Without electrical backup heater:
1 Parameter [Heating support (HZU)]: "On" select [→ Main menu
→ Settings → ISM]
2 The storage water must be heated to the required minimum tem-
perature by an external heat generator.
Installer reference guide
32
3.8.4).
Chap. 3.8.3).
5.3

Bleeding the hydraulic system

1 Make sure that the automatic vent valve cap is open (item A).
Fig. 5-1 Automatic vent valve
2 Provide the manual vent valve (item B) with a hose and direct it
away from the unit. Open the valve until air no longer comes out.
3 Fit the second manual vent valve (item C) with a hose and open
until no more air escapes.
4 Activate the ventilation function (see RoCon+ HP operating in-
structions).
By activating the ventilation function, the RoCon+ HP controller
starts a permanently defined sequence program with start/stop oper-
ation of the integrated heating circulation pump and various settings
of the 3-way switch valves integrated in the indoor unit.
Air present in the hydraulics and the connected heating circuits can
escape via the automatic vent valve during the venting function.
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.
5 Check the water pressure and replenish water if necessary (see
Chap. 3.8.4).
6 Repeat the ventilation, checking and replenishing process until:
▪ It is completely vented.
▪ There is sufficient water pressure.
Heat pump (indoor unit) with integrated heat accumulator
Daikin Altherma ETS(X/H)(B)-D
008.1447299_00 – 06/2019 – EN