Wolf BWL-1S-07 - Draining the Heating System; Overflow Valve; DHW Heating; Circulation Pump

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Connectingtheheating/DHWcircuit
17.1.4 Drainingtheheatingsystem
- Shut down the system.
Riskofscalding
Hot water can cause severe scalding. Before working on water-seated parts, allow the appliance to
cool to below 40 °C, shut off all valves and, if necessary, drain the appliance.
Riskofburns
Hot components can cause burns. Before working on the opened up appliance, allow it to cool to
below 40 °C or wear suitable gloves.
Dangerfromoverpressureonthewaterside
Overpressure on the water side can cause severe injuries. Before working on water-seated parts,
allow the appliance to cool to below 40 °C, shut off all valves and, if necessary, drain the appliance.
Note: Sensors can be water-based and therefore pressurised.
- Safeguard the heating system against accidental reconnection of the power supply.
- Openthedrain&llvalve(BDFvalve),forexampleontheindoormodule.
- Open the air vent valves in the heating circuits.
- Drain off the heating water.
17.1.5 Overowvalve
Ifnoseparatingcylinderisbeingused,theminimumheatingwaterowratecanbeensuredbymeans
ofanoverowvalve.
17.1.6 DHWheating
Do not operate via the buffer cylinder.
17.1.7 Circulationpump
Anelectronicallyregulatedhighefciencypumpisintegratedintotheindoormodule.
17.1.8 Hydraulicseparatingcylinder(lowlossheader)
Used when there are several heating circuits.
17.1.9 Maximumthermostat(MaxTh)
Toprotectareaheatingsystems(e.g.underoorheatingcircuits)fromexcessivelyhighowtemperatures,
temperature limiters or maximum thermostats are required.
The oating contacts of maximum thermostats and, where applicable, dew point monitors, can be
connected in series and connected to the programmable input E1.
When the contact opens, the heat generator and heating circuit pump are switched OFF.
17.1.10 Thefollowingparametersarecriticalforthetransferoftheheatpumpoutputto
theheatingsystem:
- The heatingwaterowrate(m
.
) in m
3
/h(nominalowrate)
- The temperaturedifferentialbetweentheowandreturn(∆t)
- The specicheatcontentofthewater(c)
Q
HP
=mxcx∆t(kW)
.
.
17.1.11 Pipedimensions
- Thepipedimensionsmustbematchedtothenominalowrate.
- Ensure that the system is vented correctly.
- Flush the system.