Operating Instructions and Installation Instructions

VARINO GRANDE 350 - 600

We reserve the right to make changes to dimensions and construction 7 Edition 10.07.2015

The use of glycol-based water is prohibited.

Unit monitoring

If the recommendations listed above (new installation or renovation) have been followed, the unit monitoring is

limited to:

- Checking the amount of make-up water (fill water volume + make-up water volume < 3 times the

unit volume)

- Checking the pH level (stable or slightly increasing)

- Checking the total hardness (stable or slightly decreasing)

We recommend monitoring these parameters two to three times a year. Note: Monitoring the quantity of make-up

water is critical to the long life of the unit.

If any of these parameters deviates from the above recommendations, refer to a water treatment specialist to

correct the problem.

Setting up a plate exchanger

If the recommendations listed above cannot be met, you can set up a plate exchanger to separate the primary

system from the secondary system, which protects the boiler from undesirable effects.

Setting up a filtration system

A filtration system on the back of the boiler is recommended in order to remove suspended particles from the

unit.

4.3. Dimensions

Connections:

1. Supply from boiler

2. Return to boiler

3. HT return (optional)

4. Discharge

4'. Second discharge (TB)

5. Condensate connection

6. Waste gas connection

7. Gas connection

8. Entrance opening for external electrical cables

9. External air intake (optional)

10. Cleaning cover, water side