Oilon VSi 6-14, Installation And Operation Manual

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1. Open the heating circuit fill valve.
2. Fill the circuit with water.
3. Bleed the storage tank (and, if necessary, the condenser and desuperheater line)
and the heating circuit until all air has escaped.
4. Leave storage tank pressure to a level of 1–1.2 bar.
● Max. storage tank pressure: 1.5 bar.
● Max. domestic hot water circuit pressure: 9 bar.
2.6.7 Domestic hot water connections
It is not allowed to install external radiators or driers in the domestic hot
water circuit.
Make the domestic hot water connections as indicated in the piping diagrams supplied
with the unit.
For the connections on the heat pump side, refer to the figures in section
HVAC
installation.
● To avoid burns, install a mixing valve in the domestic hot water flow line.
● Connect the DHW overflow pipe to a floor drain.
● If the distance to the floor drain is more than 2 meters, install a tundish (an
overflow funnel).
● The overflow pipe must slope towards the floor drain.
● Install a non-return valve upstream from the domestic cold water inlet.
Domestic hot water recirculation (optional)
If the building features a domestic hot water recirculation system and the system has
a high temperature loss, it is advisable to install a supplementary heater (such as an
ÄssäStream in-line heater or a 30-liter ÄssäStream storage tank) in the flow line.
Example of an in-line heater configuration (VSi) ver. 1
In VMi models, the system’s circulation pump needs to be installed in the domestic hot
water return line.
VMi heat pumps feature a domestic hot water coil with two sections. When there is
no demand for domestic hot water, the DHW circuit's temperature is maintained by
circulating domestic hot water only through the coil in the upper section of the storage
tank. This prevents the temperature layers inside the tank from becoming mixed.
In a standard DHW configuration where recirculation is not in use, the two coil sections
are joined together by a copper elbow on top of the heat pump.
● When connecting the DHW recirculation, remove the 1/2" plug shown in the figure.
M8011 2204EN 19 (70)