Table of Contents
Advertisement
17.1.12 Dirt trap
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.
17.1.13 Dew point monitor (DPM)
A dew point monitor (accessory) is required for area 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 thermal insulation from this area.
You can set the dew point monitor switching point to between 75 % and 100 % relative humidity using a
potentiometer (factory setting is 90 % rh).
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. 85 % rh instead of 90 % rh.
17.1.14 DHW cylinder
- The DHW cylinder must be equipped with an internal indirect coil suitable for the heating output of
the heat pump.
- The internal indirect coil should have a surface area of at least 0.25 m² per kW of heating output.
- The pipework must be sufficiently large (> DN 25).
17.1.15 Buffer cylinders
Since variable flow rates can arise on the heat draw-off side depending on the load, the minimum flow
rate must be ensured to enable fault-free heat pump operation. This is usually achieved by installing a
separating buffer cylinder or a low loss header.
A buffer cylinder is essential for all systems with radiators, individual room control (thermostatic valves),
multiple heat generators or heating circuits. This also applies to systems with the auxiliary PV
increase function or Smart Grid for heating mode.
For correct operation, defrost energy is required from the heating system. This is ensured using
a buffer cylinder with a capacity of at least 35 l. If insufficient defrost energy is available, system
faults occur and increased use of the electric immersion heater results, in order to successfully
complete defrosting.
For air/water heat pumps with output-dependent control in connection with 100 % underfloor heating,
there is no need to use a buffer cylinder, provided the following conditions are met:
The minimum flow rate via the heating system must be ensured permanently by fully opening multiple
lines (written user consent required). For this, the minimum flow rate must be verified by means of a
pressure drop calculation.
If necessary, multiple heated heating circuits can be specifically opened fully via output A1 during defrost
mode. The valve opening time must be < 20 sec.
3064298_201805
Connecting the heating/DHW circuit
33
Hide quick links:
Advertisement
Table of Contents
