Wolf BWL-1 S - Connecting the Heating;Cooling Circuit and the DHW Circuit

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20. Connecting the heating / cooling
circuit and the DHW circuit
Observe the following points for
the heating circuit
Vent
An air vent valve must be installed at the highest point on the system.
The following points must be observed for the heating side:
- To prevent any existing dirt in the heating system from causing malfunctions in the
heatpump,theheatingsystemmustbethoroughlycleanedandushedbeforethe
heat pump is connected. This applies to new systems and in particular when replacing
an appliance.
- Theowandreturnontheheatpumpsidemustbeequippedwithshut-offsystems
and2BDFvalvessothatthecondensercanbeushedwhenrequired.
Flushing the heating system
Return, heating / DHW 28 x 1
Flow, heating 28 x 1
Hose, safety valve DN 25
Flow, DHW 28 x 1
Filling the heating system
Beforecommissioning,thesystemmustbelledandvented.
- Open the cap on the vent in the indoor module by one revolution.
- Open all heating circuits.
- SlowlylltheentireheatingsystemandboilerwhilecoldviatheBDFvalveatthe
return, up to approx. 2 bar pressure (observe pressure gauge).
- Check the entire system for water leaks.
- Slowly open the expansion vessel.
- Switch on the heat pump.
- Vent the heating circuits completely: Use the contractor level, and under "Relay
test" select the desired pump. Then switch the pump ON for 5 seconds and OFF for
5seconds,vetimesinsuccession.
- When the system pressure drops below 1.5 bar, top up the water.
Connection for the
vent hose