Ochsner 288800V, Design And Installation Manual

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32 www.ochsner.com | PIA-982027-AIR 85-in-EN
Appliance installation
1 Heating water flow
2 Heating water return
»
Make the appropriate connections from the indoor
unit heating water flow and heating water return to the
heating system.
»
Ensure that the connection is tight.
»
When installing pipework, take care to prevent trans-
mission of vibration noise.
Quality of heating water
Use the correct fill water that is suitable for the components
of your heating system. We recommend fill water prepared
according to Guideline VDI 2035-2.
A high pH value and low electrical conductivity in the fill
water will reduce to a minimum the risk of corrosion to iron
and copper materials, as long as there is also a low oxygen
content. This will also minimise scaling (calcification).
Fill water characteristics
pH value at 25°C 8,5-10
Electrical conductivity at 25°C < 100 μS/cm
Oxygen content < 0.05 mg/l
Chloride < 30 mg/l
Water hardness < 3 °dH
Material damage
Unsuitable fill water can damage your system due
to scaling and corrosion.
»
If necessary, ensure that the fill water is pro -
fessionally softened and desalinated.
9.3.3 Safety valve drain
Material damage
Excessive temperatures in the heat sink system
can cause the lines to burst.
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Install a safety valve on site.
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Install a high limit safety cut-out on site.
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Observe national and regional regulations re-
garding the design of the drain and prescribed
regular operational tests.
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Size the safety valve drain so that the water can drain
freely via an open and readily visible waste water
drain.
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Install the hose with a consistent fall to the drain.
Avoid kinking the hose.
WARNING: Burns
The water that escapes when it is triggered is hot
and can cause scalding on contact with skin.
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Implement the safety valve drain in such a
manner that there can be no contact with the
water escaping from the machine.
9.3.4 Filling the heating system
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Fill the heating system with suitable fill water using
the drain and fill valve.
9.3.5 Diaphragm expansion vessel (DEV)
A diaphragm expansion vessel must be installed on site.
»
Install an appropriate diaphragm expansion vessel
and set the pre-charge pressure of the DEV and the
charge pressure of your heater depending on your
system height.
9.3.6 Cooling version
When used for cooling, all system components (pipes,
fittings) must be insulated against condensation build-up
using appropriate insulating materials. This must be con-
sidered especially for the flow pipe from the heat pump to
the heat pump buffer tank.
»
Especially in relation to cooling mode and defrosting
mode, ensure adequate 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 28, Assembling the appliance casing)