Venting The Hydraulic Block - Daikin GCU compact Series Installation And Operating Instructions Manual

Fig. 9-7 Filling the heating system and storage tank charging cir-
cuit (shown on the GCU compact 5xx)
1 Filling hose with non-return valve (and pressure gauge)
2 Combined filling and draining valve
3 Heater ballcock - inflow
4 Heater ballcock - return flow
5.1 Valve drive
5.2 Unlocking key of the drive lock
6 Water tap
7 Automatic vent valve
8 Pressure gauge
3UV DHW 3-way distribution valve
3UVB1 3-way mixer valve
1 Connect the filling hose (Fig.
valve and an external pressure gauge
to the fill/drain cock (Fig. 9-7, item 2) and secure it against slip-
ping off with a hose clamp.
(20)
if not already installed in the heating system
Gas Combi Unit
Floor-standing gas condensing boiler with integrated heat storage
008.1543899_02 – 04/2019 – EN
(20)
9-7, item 1) with the non-return
(20)
(on the building side)
9
2 Make sure that the automatic vent valve cap is open
item A).
Fig. 9-8 Undoing the automatic vent valve cap
A Automatic vent valve cap
3 Open the water tap
4 Open the fill/drain cock
sure gauge (Fig. 9-7, item 8).
5 Fill the system with water until the pressure gauge shows that
the system target pressure is reached (system height + 2 m,
1 m water column corresponds to 0.1 bar). The overpressure
valve must not actuate.
6 Close the fill/drain cock
7 Vent the hydraulic block
8 Close the water tap
9 Disconnect the filling hose
valve from the fill/drain cock
9.2.7

Venting the hydraulic block

1 Make sure that the automatic vent valve cap is open
item A).
)
Fig. 9-9 Connecting the vent hose
B Manual vent valve
2 Provide the manual vent valve
direct it away from the device. Open the valve until water comes
out.
3 Switch on the power supply to the GCU compact.
Service and maintenance
(Fig. 9-7, item 6) on the feed pipe.
(Fig. 9-7, item 2) and observe the pres-
(Fig. 9-7, item 2).
(see Chap. 9.2.7).
(Fig. 9-7, item 6) on the feed pipe.
(Fig. 9-7, item 1) with non-return
(Fig. 9-7, item 2).
(Fig. 9-9, item B) with a hose and
Installation and operating instructions
(Fig. 9-8,
(Fig. 9-8,
57