Dimplex SRX 160C - Manual (Page 6)

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Hydraulic connection
To ensure a sufficient water flow rate through the fan convec-
tors, observe the following points:
- The devices are not suitable for installation in single-pipe
systems.
- The nominal width of the connection pipe must have a
minimum diameter of 15 mm.
- If the devices are installed in a heating system with various
heat distribution systems (e.g. underfloor heating), a sepa-
rate circuit is required to guarantee a sufficient water flow
rate.
- For optimum operation (heat output) of the fan convectors,
a hydraulic balance is required on the heating system.
Fig. 5 shows the various hydraulic connection options on the
device. The recommended flow and return connections are
shown in fig. 5 and fig. 4. The heating pipes can be laid in the
floor or in the wall. The device is supplied with two copper pipes
with a diameter of 15 mm that are fitted on the heat exchanger
at the factory.
Before and during filling of the heating system, all pipe connec-
tions must be checked for leaks. During filling, the bleeder valve
(see fig. 4) must be open such that air can escape from the de-
vice. If necessary, bleed again following commissioning (circulat-
ing pump running).
Connect the condensate pipe supplied to the outlet nozzle and
route to a suitable outlet with a gradient of at least 5°.
Electrical connection
WARNING – The device must be grounded!
WARNING – Phase conductor (brown) and neutral conductor
(blue) must not be swapped as this may cause malfunctions.
The electrical connection should have a supply voltage of ~230-
240V, 50 Hz.
The device must be installed by a qualified electrician in compli-
ance with the existing standards and local installation guide-
lines.
Before performing installation, ensure that the power supply is
switched off.
The device is equipped with a flexible 1 m connection cable (4 x
0.75 mm²), which can be used to connect the heater directly to
the power supply via a suitable wall socket.
In the electrical supply line, fit a circuit breaker for each pole
with a contact opening width of at least 3 mm. Automatic fuses
are also permitted as separators. Automatic fuses should have a
delayed tripping characteristic.
Conductor configuration of the connection cable:
Brown: 'L' – supply voltage phase conductor
Blue: 'N' – supply voltage neutral conductor
Green/yellow: 'PE' – grounding conductor
Black: control conductor (temperature reduction; on/off)
For circuit diagram, see fig. 6.1 resp. fig. 6.2.
Control conductor
By activating the control conductor, see fig. 6.1, the set tem-
perature on the device is lowered or raised depending on the
selected mode.
See also "Changing automatically the set temperature"
The temperature change is forwarded to any downstream de-
vices via the control conductor.
If a programming cassette is used, the control signal from the
cassette, which is plugged into the pilot device, is forwarded to
any downstream devices; see fig. 6.2.
The control conductor does not have to be in phase with the
supply connection. If the control conductor is not used, it must
be properly insulated.
WARNING – if you switch over to controlled operation, the
mains voltage is on this conductor!
WARNING – do not ground the control conductor.
When taking out of service, e.g. for maintenance work, ensure
that both the mains supply and the control conductor are dis-
connected from the power supply, because this may result in
external voltage (via a timer contact or pilot device with pro-
gramming cassette).
Final installation
Fit casing cover following completion of installation work. To do
this, screw in the four fixing screws on the underside of the de-
vice, see fig. 2.
Operation
The control panel is shown in fig. 3.
The individual elements have the following meaning:
A – Operating mode button
B – On/off indicator
C – Cooling mode indicator
D – Heating mode indicator
E – Fan level button
F – Low fan level indicator
G – Medium fan level indicator
H – High fan level indicator
J – Thermostat setting wheel
K – Cover for programming cassette slot
Heating mode
Press the button once or several times until the red in-
dicator lights up.
Set the desired room temperature with the setting wheel.
Depending on the current room temperature and the tem-
perature set on the thermostat, the electronics calculate
which fan level (fan speed) to use.
There are 3 possible fan levels. If necessary, the number of pos-
sible fan levels can be reduced. For instance, to limit the fan
levels to a maximum of 2, press the
button once or sev-
eral times until the red 2 indicator lights up.