Vivax HPM-28CH84AERIs R32-1H3 handleiding

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Vivax

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Handleiding

ENG VIVAX

As a result, the hydraulic components might freeze up after all. Take preventive actions to ensure a minimal exposure of

the glycol to air.

Due to the presence of glycol, corrosion of the system is possible. Uninhibited glycol will turn acidic under the influence of

oxygen. This process is accelerated by presence of copper and at higher temperatures. The acidic uninhibited glycol attacks

metal surfaces and forms galvanic corrosion cells that cause severe damage to the system. It is of extreme importance:

That the water treatment is correctly executed by a qualified water specialist.

That a glycol with corrosion inhibitors is selected to counteract acids formed by the oxidation of glycols.

That in case of an installation with a domestic hot water tank, only the use of propylene glycol is allowed. If the

system does NOT contain a domestic hot water tank, then you can use either propylene glycol or ethylene glycol;

That no automotive glycol is used because their corrosion inhibitors have a limited lifetime and contain silicates that

can foul or plug the system;

That galvanized piping is not used in glycol systems since it may lead to the precipitation of certain elements in the

glycol’s corrosion inhibitor;

To ensure that the glycol is compatible with the materials used in the system.

Protection against bursting: the glycol will prevent the piping from bursting, but NOT the liquid inside the piping from

freezing.

Protection against freezing: the glycol will prevent the liquid inside the piping from freezing.

The required concentration might differ depending on the type of glycol. ALWAYS compare the requirements from

the table above with the specifications provided by the glycol manufacturer. If necessary, meet the requirements set

by the glycol manufacturer.

If the liquid in the system is frozen, the pump will NOT be able to start. Mind that if you only prevent the system from

bursting, the liquid inside might still freeze.

When water is at standstill inside the system, the system is very likely to freeze and get damaged.

3.5 Water Flow Switch

Water may enter into the flow switch and cannot be drained out and may

freeze when the temperature is low enough. The flow switch should be

removed and dried, then can be reinstalled in the unit.

Counterclockwise rotation, remove the water flow switch.

Drying the water flow switch completely.

3.6 Adding Water

Connect the water supply to the fill valve and open the valve.

Make sure the automatic air purge valve is open (at least 2 turns).

Refer to Figure 3-3.3.

Fill with water until the manometer indicates a pressure of

approximately 2.0 bars. Remove air in the circuit as much as possible

using the air purge valve. Air in the water circuit could lead to

malfunction of the backup electric heater.

3.7 Water Piping Insulation

The complete water circuit including all piping, water piping must be insulated to prevent condensation during cooling operation

and reduction of the heating and cooling capacity as well as prevention of freezing of the outside water piping during winter. The

insulation material should at least of B1 fire resistance rating and complies with all applicable legislation. The thickness of the

sealing materials must be at least 13mm with thermal conductivity 0.039W/mK in order to prevent freezing on the outside water

piping. If the outdoor ambient temperature is higher than 30°C and the humidity is higher than RH 80%, the thickness of the

sealing materials should be at least 20mm in order to avoid condensation on the surface of the seal.

Figure 3-3.2: Water flow switch

Figure 3-3.3: Air purge valve

Do not fasten the black plastic

cover on the vent valve at the

topside of the unit when the

system is running. Open air

purgevalve,turn anticlockWise

at least2 full turnsto releaseair

from the system.

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