Wolf BWL-1 S - Page 31

313064298_201507
Maximum thermostat (MaxTh)
Toprotectsurface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 source is switched off.
Dew point monitor (TPW)
Adewpointmonitor(accessories)isrequiredforsurfacecoolingsystems(e.g.underoor
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ttedtothecoolingcircuitow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.
To protect the heat pump, a dirt trap must be installed in the heating return.
Installingdirttrapsorcarryingoutanyothermodications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-efciencypumpfromdirt/sludgeandmagnetite.
Dirt trap
20. Connecting the heating / cooling
circuit and the DHW circuit
Ifnoseparatingcylinderisbeingused,theminimumheatingwaterowratecanbe
ensuredbymeansofanoverowvalve.
Overowvalve
Anelectronicallyregulatedhigh-efciencypumpisintegratedintotheindoormodule
Circulation pump
Used when there are several heating circuits
Hydraulic separating
cylinder (low loss header)
Do not operate via the buffer cylinder
DHW heating
- Thepipedimensionsmustbematchedtothenominalowrate.
- Ensure that the system is vented correctly.
- Flush the system.
Pipe dimensions
- 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)
The following parameters
are critical for the transfer of
the heat pump output to the
heating system:
Q
WP
= m x c x ∆t (kW)
.
.
Draining the heating system
- 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&llvalve),forexampleontheindoormodule
- Open the air vent valves on the heating circuits
- Drain off the heating water