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Temperature sensor connection
The boiler is equipped with a weather-
compensated control of the flow temperature.
This function requires the connection of an
outside temperature sensor. The DHW
temperature sensor (cylinder sensor) required
for the operation of the integral DHW cylinder
is fitted and terminated (PTC resistor) in the
factory.
Fit the outside temperature sensor at a height
representing approx. one third of the building
height (minimum distance from the ground:
2 m) on the coldest side of the building (north
or north-eastern side). Never mount the sensor
near external heat sources, otherwise the
temperature it captures could be falsified
(chimneys, hot air from air ducts, sunlight etc.).
The cable outlet must always point down-
wards to prevent the ingress of moisture.
For the electrical installation, a 2-core cable
with a minimum cross-section of 1 mm
2
is
recommended. The outside temperature
sensor resistance is 2000
Ω
at 25 °C (PTC
resistor).
The internal temperature sensors are fully
wired up at the factory. The flow and return
temperature sensors (NTC resistors) are
connected together with the control cable for
the burner fan via a common plug at the burner
control unit CVBC of the pressure-jet burner.
The flue gas temperature sensor (Pt resistor) is
connected directly at the control panel. The
temperature sensors can be directly plugged in
at the individual sensors to ease replacement.
To regulate a mixer circuit, connect a mixer
circuit flow sensor (accessories TMKF,
part no: 15 60 62) (PTC resistor).
Fig. 3.4.9: Connection allocation of the PCB
plug and cable/lead colours of the factory-
fitted connecting cable
Important:
Generally, route
the sensor leads outside the
equipment separately. Never
route sensor leads and mains power
cables inside the same conduit. This could
lad to severe faults in the control
operation.
To safeguard the perfect operation and to
prevent damage to the control unit, use
only the original ROTEX sensors supplied.
The outside temperature sensor and all
internal temperature sensors are part of
the standard delivery.
To operate the system without the DHW
cylinder (the cylinder must, nevertheless,
be filled!), remove the sensor prior to
commissioning from the PCB plug.
Connecting the mixer assembly AMK1
(part no. 15 60 44) requires the mixer
circuit contact sensor TMKF (part no.
15 60 62). Observe the operating
instructions for the ROTEX control unit.
* when using a DHW primary pump cable
Содержание GasCompactUnit Series
Страница 17: ... 17 Fig 3 4 3 Flue gas system sets ...
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Страница 58: ... 58 Fig 8 1 Residual head GSU 25 GCU 25 heating side Fig 8 2 Residual head GSU 35 GCU 35 heating side ...