Ochsner TERRA 11, Operating And Installation Manual

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INSTALLATION | Appliance installation
24 www.ochsner.com | 982001-TERRA-M2-M4-EN04.1
11_02_200_204_01_021
1
1 Drain and fill valve with hose screw connector (spe -
cial thread M21x1.5)
i Information
The drain and fill valve has a special thread
(M21x1.5) for the hose screw connection.
»
Take care of the hose screw connector provid-
ed and keep it close to the heat pump.
11_02_200_202_01_028
1
2
4
3
1 Drain and fill valve
2 Locking ring for closing and opening the drain and fill
valve
3 Hose screw connector (special thread M21x1.5)
4 Cover
Venting the heating system
On the TERRA 6, TERRA 8, TERRA 11 and TERRA 14
(M2 hydraulic version) indoor units, the multifunctional as-
sembly (MFA) has a quick-action air vent valve for venting
the heating system.
»
Before venting, open the quick-action air vent valve
on the multifunctional assembly (MFA). Do this by
pulling the red cover on the valve.
Material damage
During venting, water can escape from the air out-
let on the quick-action air vent valve.
»
Ensure that the electronics in the indoor unit
do not become wet.
11_02_200_202_01_029
1
1 Quick-action air vent valve on the multifunction-
al assembly (TERRA 6, TERRA 8, TERRA 11,
TERRA 14).
Material damage
»
Close the quick-action air vent valve again
after venting by pressing the red cover on the
valve.
10.2.4 Diaphragm expansion vessel (DEV)
► The indoor units for the TERRA 6, TERRA 8, TER-
RA 11 and TERRA 14 heat pumps are factory-fitted
with a 24 l diaphragm expansion vessel for the heat
sink system.
► The factory-set pre-charge pressure on the DEV is
1.5 bar.
i
Information
The set charge pressure on the DEV must not be
taken as correct but must be adjusted for the par-
ticular system.
»
Set the charge pressure on the DEV accord-
ing to the height of your system and the filling
pressure of your heating system.
10.2.5 Flow metering
A flow meter is installed (heat sink system) inside the indoor
unit of your heat pump. The flow meter measures the flow
rate in your heating system. Too low a flow rate will lead to
a safety shutdown of the heat pump.