24
E
Cylinder temperature sensor (system boiler)
X
sÖ
Equipotential bonding (earth conductor)
Note on connecting accessories
When connecting accessories observe the sep-
arate installation instructions provided with
them.
On-site connections on the HMBU heat management unit
A
B
Fig. 15
A
Diaphragm grommets, 230 V cables
B
Diaphragm grommets, extra low voltage (ELV)
■
Open diaphragm grommets as required. Thread
through only one cable at a time without a plug.
Ensure diaphragm grommets are airtight. If required,
remove plug from cable. After threading the cable
through, re-fit the plug to the wire ferrules.
■
For cables without strain relief bushings, provide
strain relief in the wiring chamber in the form of cable
ties.
Outside temperature sensor
Fitting location for outside temperature sensor
■
North or north-westerly wall, 2 to 2.5 m above
ground level; in multi storey buildings, in the upper
half of the second floor
■
Not above windows, doors or vents
■
Not immediately below balconies or gutters
■
Never render over.
Outside temperature sensor connection
See page 23
2-core lead, length up to 35 m with a cross-section
of 1.5 mm
2
Connecting the low loss header sensor
)
The sensor of the low loss header is connected to the
accessory extension EM-P1 or EM-M1/MX (ADIO elec-
tronics module) respectively.
See installation instructions for extension EM-P1
or EM-M1/MX
Installation sequence
Electrical connections
(cont.)
6167586
Installation
