Daikin GCU compact Series, Installation And Operating Instructions Manual

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4 Set-up and installation
Installation and operating instructions
37
Gas Combi Unit
Floor-standing gas condensing boiler with integrated heat storage
008.1543899_02 – 04/2019 – EN
Fig. 4-43 Safety gas control block
3.1 Gas type setting screw
3.2 Plunger coil
3.3 Measurement connection IN - inlet gas pressure
3.4 Gas inlet
3.5 Gas solenoid valve
3.6 Voltage supply for gas solenoid valve
3.7 Voltage supply for plunger coil
Fig. 4-44 Gas type setting
Check the inlet gas pressure
1 Turn the screw in the measuring connection inlet gas pressure
( Fig. 4-43 , item 3.3) half a turn anticlockwise .
2 Vent the gas line in a professional manner.
3 Connect the pressure gauge measuring hose to the inlet gas
pressure measuring connection (
Fig. 4-43 , item 3.3).
4 Check the inlet gas pressure.
è If the gas inlet pressure lies outside the permitted range
(
Tab. 12-9 ), inform the responsible gas supply company. For li-
quid gas: Check the pressure reducer and set the burner to the
permissible gas inlet pressure (see
Chap. 7 ). This adjustment
must be appropriately labelled with a suitable burner settings
sticker and an entry on the settings type plate (
Fig. 3-1 / Fig. 3-3 ,
item 33).
4.9 Filling the system
Only fill the GCU compact after completion of all installation work in
the order shown below.
4.9.1 Checking the water quality and adjusting
the pressure gauge
1 Comply with the instructions for the water connection (see
Chap. 4.6 ) and water quality (see Chap. 1.2.5 ).
2 Adjust the mechanical manometer (install on the building side in
accordance with
Chap. 4.6.2 or temporarily installed with filling
hose).
3 Rotate the pressure gauge glass so that the minimum pressure
mark equates to the
system 2 m (1 m water column
corresponds to 0.1 bar).
4.9.2 Filling the hot water heat exchanger
1 Open the shut-off valve for the cold water supply pipe.
2 Open the hot water tap connections so that the draw-off volume
can be set as high as possible.
3 Once water has been discharged from the tap connections do
not interrupt the cold water flow; this will ensure that the heat ex-
changer will be fully vented and that any impurities or residue
will be discharged.
4.9.3 Filling the condensate siphon
1 Open the inspection piece of the flue gas system.
2 Fill approx. one litre of water into the flue gas pipe.
3 Observe whether water flows out of the condensate drain
without any problem.
4 Close the inspection piece of the flue gas system again.
4.9.4 Filling the storage tank
see Chap. 9.2.5 .
4.9.5 Filling the heating system
See Chap. 9.2.6 .