Protective zone 4
0020297937_01 aroTHERM plus Installation and maintenance instructions
115
The pressure in the heating circuit is monitored using a pres-
sure sensor. If the pressure falls below 0.5 bar, a fault shut-
down occurs. If the pressure rises to above 0.7 bar, the fault
is reset again.
The heating circuit's circulation water volume is monitored
using a flow rate sensor. If no flow rate can be detected
when there is a heat demand when the circulation pump is
running, the compressor does not start up.
If the heating water temperature falls below 4 °C, the pro-
duct's frost protection function is automatically activated as
the heating pump is started.
4
Protective zone
4.1
Protective zone
The product contains R290 refrigerant. In the event of a leak,
escaping refrigerant may collect near the ground. The refri-
gerant must not get into building openings, grooves or into
the waste-water system. The refrigerant must not collect in
any way that may lead to a dangerous, explosive, suffocating
or toxic atmosphere
A protective zone is defined for the area close around the
product. There must be no windows, doors, ventilation open-
ings, light shafts, cellar entrances, escape hatches, flat-roof
windows or downpipes in the protective zone. The protective
zone must not extend to adjacent buildings or public traffic
areas.
There must be no ignition sources, such as plug sockets,
light shafts, lamps or electrical switches in the protective
zone.
4.1.1
Protective zone, for ground installation, in
front of a building wall
C
D
A
B
A
2100 mm
B
3100 mm
C
200 mm/250 mm
D
1000 mm
Dimension C is the minimum clearance that must be main-
tained to the wall (
→
Maintaining minimum clearances).
4.1.2
Protective zone, for ground installation on
the premises, and for flat-roof installation
A
A
1000 mm
Dimension A is a clearance around the product.
4.1.3
Protective zone, for ground installation, in a
building corner
A
B
C
D
E
F
G
A
2100 mm
B
2600 mm
C
200 mm/250 mm
D
500 mm
E
1000 mm
F
500 mm
G
1800 mm
The right-hand corner of the building is shown here. Dimen-
sions C and D are the minimum clearance that must be
maintained to the wall (
→
Maintaining minimum clearances).
Dimension D varies for the left-hand corner of the building.
