Draining The Heating System; Overflow Valve; Dhw Heating; Circulation Pump - Wolf BWL-1S-05 Installation And Operating Instructions Manual

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 & fill 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 Overflow valve
If no separating cylinder is being used, the minimum heating water flow rate can be ensured by means
of an overflow valve.
17.1.6 DHW heating
Do not operate via the buffer cylinder.
17.1.7 Circulation pump
An electronically regulated high efficiency 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. underfloor heating circuits) from excessively high flow temperatures,
temperature limiters or maximum thermostats are required.
The floating 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 flow rate ( m
- The temperature differential between the flow and return (∆t)
- The specific heat content of the water (c)
.
Q = m x c x ∆t (kW)
HP
17.1.11 Pipe dimensions
- The pipe dimensions must be matched to the nominal flow rate.
- Ensure that the system is vented correctly.
- Flush the system.
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Connecting the heating/DHW circuit
.
) in m
.
/h (nominal flow rate)
3
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