Technical data

34
sized to ensure a slope of 10 mm per metre of length; if this slope cannot be •
achieved, a condensate pump must be installed near to the discharge;
realized in such a way as to prevent icing of the condensate;•
mixed, for example, with domestic effluents (washing machine, dishwasher, etc.), •
usually alkaline, acting as a buffer solution before discharging into the sewer.
Do not discharge the condensate into the guttering, since it may ice and corrode the
materials normally used for gutters.
5.6 FILLING OF HYDRAULIC CIRCUIT
After having completed all hydraulic, gas and electrical connections, the installer can
proceed filling the hydraulic circuit, observing the following steps:
You will need: the appliance connected hydraulically and electrically.
COLD CIRCUIT GAHP-GS
Check that the system delivery and return are correctly connected to the appli-1.
ance’s respective fittings (see Figure 3.1 Size → 15).
Activate the automatic air purging valves of the plant and open all thermostatic 2.
valves.
Fill the hydraulic circuit to at least the minimum amount and add inhibited mo-3.
noethylene glycol to a volume percentage of 25% (obligatory minimum required
for correct system operation) or greater depending on the minimum winter tem-
perature in the installation area (see Table 5.3 Technical data for filling the hydraulic
circuit → 36). Robur recommends using inhibited corrosion resistant monoethyl-
ene glycol.
Check the filter on the return pipe for impurities; clean it if necessary.4.
Check that the siphon on the drainage condenses has been filled with water as 5.
indicated in the relative paragraph.
Bring the plant to the correct pressure, making sure that the water pressure is not 6.
less than 1 bar and not over 2 bar, and run the circu lation pump for at least 30 min-
utes. Check the water filter again and clean it if necessary.
The technical data (Tables 3.1 GS HT/LT technical data → 12 and 3.2 WS technical da-
ta → 13) regarding the cold circuit refer to water with 25% glycol content, so that no
correction factor need to be applied to Table 5.3 Technical data for filling the hydraulic
circuit → 36.
To facilitate the operation of bleeding air from the hydraulic circuit, the appliance is
equipped with an additional manual air bleeding valve.
COLD CIRCUIT GAHP-WS
Check that the system delivery and return are correctly connected to the appli-1.
ance’s respective fittings (see Figure 3.1 Size → 15).
Activate the automatic air purging valves of the plant and open all thermostatic 2.
valves.