Wolf BWL-1 S Installation And Operating Instructions Manual page 31

Draining the heating system
Overflow valve
DHW heating
Circulation pump
Hydraulic separating
cylinder (low loss header)
Maximum thermostat (MaxTh)
The following parameters
are critical for the transfer of
the heat pump output to the
heating system:
Pipe dimensions
Dirt trap
Dew point monitor (TPW)
3064298_201507
20. Connecting the heating / cooling
circuit and the DHW circuit
- Switch off the system (see operating instructions) and allow to cool to at least
40 °C, otherwise there is a risk of scalding
- Safeguard the heating system against accidental reconnection of the power supply
- Open the drain valve (boiler drain & fill valve), for example on the indoor module
- Open the air vent valves on the heating circuits
- Drain off the heating water
If no separating cylinder is being used, the minimum heating water flow rate can be
ensured by means of an overflow valve.
Do not operate via the buffer cylinder
An electronically regulated high-efficiency pump is integrated into the indoor module
Used when there are several heating circuits
To protect surface 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 source is switched off.
- The heating water flow rate (m
- The temperature differential between the flow and return (∆t)
- The specific heat content of the water (c)
.
Q
- The pipe dimensions must be matched to the nominal flow rate.
- Ensure that the system is vented correctly.
- Flush the system.
To protect the heat pump, a dirt trap must be installed in the heating return.
Installing dirt traps or carrying out any other modifications in the supply line to
the safety valve is not permitted.
Wolf recommends a sludge separator with magnetite separator to protect the
appliance and the high-efficiency pump from dirt / sludge and magnetite.
A dew point monitor (accessories) is required for surface cooling systems (e.g. underfloor
heating circuit, cooling ceiling). If the cooling circuit serves several rooms with different
relative humidities, several dew point monitors must be installed and connected in series.
The monitors are fitted to the cooling circuit flow in the room to be cooled. Remove the
insulation from this area.
If required, the dew point monitor can be installed directly on the indoor unit. In this
case, the switching point must be reduced slightly, e.g. 90 % rel. humidity instead of
95 % rel. humidity.
.
) in m
/h (nominal flow rate)
3
.
= m x c x ∆t (kW)
WP
31