Ferroli RVL-I PLUS, Руководство по установке и обслуживанию

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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 .
There need drying
■ CounterclockWise rotation, remove the flow switch.
■ Drying the flow switch completely.
There need drying
ETHYLENE GLYCOL IS TOXIC
Use of glycol
■ Glycol use for installations with a domestic hot water tank:
- Only propylene glycol having a toxicity rating or class of 1, as listed in "Clinical Toxicology of Commercial Products, 5th edition" may be used .
■ If there is too much pressure when using glycol, connect the safety valve to a drain pan to recover the glycol.
■ 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. In other installations
the use of ethylene glycol is fine.
■ 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.
■ Be aware of the hygroscopic property of glycol. It absorbs moisture from the environment.
■ Leaving the cap off the glycol container causes the concentration of water to increase. The glycol concentration is then lower
and the water could freeze .
■ Preventive actions must be taken to ensure minimal exposure of the glycol to air.
NOTE
WARNING
CAUTION
HYDRAULIC CONNECTIONS
During filling, it might not be possible to remove all air in the system. Remaining air will be removed through the automatic air
purge valves during the first operating hours of the system. Topping up the water afterwards might be required.
■ The water pressure indicated on the manometer will vary depending on the water temperature (higher pressure at
higher water temperature) . However, at all times water pressure should remain above 0 .3 bar to avoid air entering the circuit .
■ The unit might drain-off too much water through the pressure relief valve.
■ Water quality must be according to "Safe Drinking water Act "
The complete water circuit including all 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 thickness of the
sealing materials must be at least 13 mm with λ= 0.039 W/mK in order to prevent freezing on the outside water piping.
If the temperature is higher than 30°C and the humidity is higher than RH 80%, then the thickness of the sealing materials should
be at least 20 mm in order to avoid condensation on the surface of the seal .
1 . Connect the water supply to the fill valve and open the valve.
2 . Make sure the automatic air purge valve is open (at least 2 turns) .
3 . Fill with water until the manometer indicates a pressure of approxi-
mately 2 .0 bar . Remove air in the circuit as much as possible using the
air purge valves . Air present in the water circuit might cause malfunctio-
ning of the backup heater .
Do not fasten the black plastic cover on the vent valve at the topside of the unit when the
system is running . Open air purge valve, turn anticlockWise at least 2 full turns to release
air from the system .
NOTE
Filling with water
Piping insulation