Ochsner TERRA 6, Operating And Installation Manual

Page: 18 / 92

INSTALLATION | Preparing to install the appliance
18 www.ochsner.com | 982001-TERRA-M2-M4-EN04.1
i Information
For systems with a direct heating circuit, install the
TPO sensor in the indoor unit heating flow.
»
Install the TPO sensor in the sensor sleeve
on the heating flow pipe in the indoor unit
(marked point downstream of the multifunc-
tional assembly).
The TPO sensor does not need to be installed if
there is already a heat pump buffer tank, a bypass
or a low loss header or heating circuit with mixing
valve.
11_02_200_204_01_01
1
TPO
1
1 Sensor sleeve for the TPO sensor on the heating flow
pipe of the indoor unit
DHW sensor (TB):
OCHSNER DHW cylinders are fitted with appropriate fe -
male sockets for installing the sensor.
»
Install the DHW sensor in the top one-third of the
DHW tank (or at the very least in the top half). The
lower the selected position of the DHW sensor, the
larger the switching hysteresis (5-15 K) will need to
be.
i
Information
Ensure that the DHW sensor is correctly positioned
and extends beyond the tank insulation into the
interior of the DHW tank. This is the only way in
which the temperature can be measured correctly.
Mixer sensor (TMK):
If, in addition to a direct heating circuit, your system also
has a heating circuit with mixing valve, then a mixer sensor
must be installed. The mixer sensor is supplied with the
heat pump, as a contact sensor including band clamp and
heat conducting paste.
»
Install the mixer sensor immediately downstream
of heating circuit circulation pump 2 for the heating
circuit with mixing valve, on a (metal) pipe made of a
good heat-conducting material.
9.3.5 Pumps and servomotors (230 VAC)
Pumps (heating circuit pumps, DHW charging pump) and
servomotors (switching module, mixing valve) are con-
nected directly to the OTE controller (1x 230 VAC power
supply).
Material damage
A test run of the pumps and servomotors may be
conducted only on a system that has been pre-
pared for commissioning. The hydraulics must be
fully connected.
9.3.6 PSU signal contact
Tariff switching on the heat pump system
In the case of tariff switching (with interrupted power deliv-
ery), the heat pump is temporarily shut down by the power
supply utility (PSU).
Uninterrupted tariff
In the case of tariff switching with uninterrupted power
supply, the heat pump is temporarily shut down by the
power supply utility. A PSU signal contact is provided for
this purpose on the indoor unit. To activate this function, it
is necessary to remove a cable bridge in the control box
and connect the PSU signal contact cable. (see page 27,
Electrical connection of the indoor unit)
Shutdown by means of a tariff contactor
In the case of shutdown by means of a tariff contactor in-
stalled on behalf of the customer (sealed by the PSU), the
power supply to the heat pump compressor is disconnect-
ed. Here, it is essential to connect an auxiliary contact to
the tariff contactor (N/C contact) of the PSU signal contact
on the indoor unit.
Night tariff
Where tariff switching takes place within the meter (night
tariff), the PSU signal contact is not connected.
9.3.7 Smart Grid
For the Smart Grid function, special descriptions are avail-
able on request from your OCHSNER Customer Service
department.