Ochsner TERRA 11, Руководство по эксплуатации и установке

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INSTALLATION | Appliance installation
982001-TERRA-M2-M4-EN04.1 | www.ochsner.com 25
i Information
The nominal flow rates for the heat sink system
(WNA) should be determined. Different flow rates
can lead to a reduction in the efficiency of the heat
pump.
10.2.6 Cooling version
When used for cooling, all system components (pipes,
fittings) must be insulated against condensation build-up
using appropriate insulating materials. This is particularly
important on the flow line from the heat pump to the heat
pump buffer tank.
»
Especially in relation to cooling mode, ensure ade-
quate sizing of the hydraulic safety devices.
»
Allow for a pressure maintaining device with appro-
priate pre-charge pressure, adjusted for the operating
conditions.
»
Ensure that in cooling mode the appliance casing on
the indoor unit is fully and correctly installed. (see
page 20, Disassembling the appliance casing)
10.2.7 Connecting the DHW
The indoor unit can be fitted with an optional 3-way switch -
ing module for switching between the DHW circuit and the
heating circuit.
When sizing an additional external DHW charging pump,
take into consideration the pressure differential of the ex-
ternal plate heat exchanger.
11_02_200_204_01_005
1 2
1 DHW flow
2 Heating water/DHW return
»
Make the appropriate connections from the DHW flow
and DHW return on the indoor unit to the DHW tank.
10.3 Connecting heat source system
i Information
The system installer must ensure structure-borne
noise attenuation of the pipe fixings for the brine
hydraulics and sealing of the wall conduits.
10.3.1 Connecting the brine hydraulics
11_02_200_204_01_006
1 2
1 Heat source flow (brine)
2 Heat source return (brine)
»
Connect the brine hydraulics (heat source flow and
heat source return) to the indoor unit.
»
Use pipe fixings with suitable structure-borne noise
attenuation to secure the brine hydraulics.
»
Do not install the pipe fixings in the vicinity of bends
in the pipes.
»
Check the brine hydraulics for leaks.
»
Insulate the brine lines around the connection points
on the indoor unit.
10.3.2 Heat transfer medium (brine circuit)
i
Information
When selecting the heat transfer medium in the
brine circuit, observe national and regional regu-
lations and codes (also with regard to investment
subsidies).
»
Calculate the required heat transfer medium (brine)
charge in advance. The charge is determined based
on the line length, pipe diameter and heat pump liquid
capacity.
»
Mix the heat transfer medium in a clean container.
The antifreeze must not be mixed with corrosive raw
water (pH value below 7.0), distilled water or rain
water.
i
Information
When using ethylene glycol as an antifreeze:
»
Ensure an antifreeze percentage of 25-30%
for frost protection of -12 to -15°C.