Ochsner TERRA 6, Руководство по эксплуатации и установке

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INSTALLATION | Appliance installation
982001-TERRA-M2-M4-EN04.1 | www.ochsner.com 27
10.3.5 Diaphragm expansion vessel (DEV)
► The indoor unit is equipped at the factory with a 24 l
diaphragm expansion vessel for the heat source
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 pre-charge pressure on the DEV and
the charge pressure for your heat source sys-
tem according to the height of your system.
»
Allow for a pressure maintaining device with appro-
priate pre-charge pressure, adjusted for the operating
conditions.
10.3.6 Flow metering
A flow meter (heat source system) is installed in the indoor
unit of your heat pump. The flow meter measures the flow
rate in your heat source system. Too low a flow rate will
lead to a safety shutdown of the heat pump.
i
Information
The nominal flow rates for the heat source system
(WQA) should be ensured. Different flow rates can
lead to a reduction in the efficiency of the heat
pump.
10.4 Electrical connection
10.4.1 General
WARNING: Electrocution
Before commencing work on electrical connections
and installation, the heat pump system must be
isolated and voltage-free.
WARNING: Electrocution
Work on electrical connections and installation may
be conducted only by qualified contractors.
WARNING: Electrocution
Before commissioning, the necessary fault pro-
tection measures on the system and the earth
connection must be checked by an authorised
contractor.
i Information
It is essential that the regulations of the responsible
power supply utility (PSU) and the applicable EN
standards be observed.
► Before making the electrical connections, the neces-
sary preparations must have been completed. (see
page 16, Preparing the electrical connections)
► For the electrical connection, use the system princi-
ple schematic appropriate to your heat pump system.
(see page 60, System schematic diagrams)
10.4.2 Electrical connection of the indoor unit
»
Remove the control box cover. (see page 20, Dis-
assembling the appliance casing)
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1
»
Undo and remove the four nuts on the two metal
plates at the cable entries.