Closed Expansion Vessel System - LA NORDICA TermoSuprema Compact DSA Instructions For Installation, Use And Maintenance Manual

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Instructions for installation, use and maintenance manual (44 pages)

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OPEN EXPANSION VESSEL: with a capacity of 10% of the total water content of the thermocooker and the

system. This must be positioned at the highest point of the system, at least 2m above the radiator placed at the

highest level.

SAFETY PIPE : that connects by means of the shortest path without descending routes or siphoning the flow of

the thermo stove with the top part of the tank described in point 1. The safety pipe must have the minimum gas

section of 1''.

LOAD PIPE : that connects the bottom of the tank of point1 with the system's return pipe.

It must have a minimum gas section of ¾''.

All these elements must not, for any reason, have intercepting objects inserted, as these could accidentally

exclude them, and they must be placed in an area not subject to freezing, seeing that, if they should freeze, the

boiler frame could break or even explode.

In case of exposure to ice, it is opportune to add a sufficient quantity of anti-freeze to the water in the system,

enough to completely eliminate the problem.

In no way should water circulate in the small tank in-between the safety pipe and load pipe, seeing as this

oxidises of the water and consequently this quickly corrodes the thermo stove and system body.

HEAT DISCHARGE VALVE: permits an extra positive safety, capable of preventing boiling, even if there is no

electric power.

It consists of a valve, similar to a pressure safety valve, but differs, seeing that it opens once the pre-calibrated

temperature (normally 94-95° C) is reached. It disch arges hot water from the system flow pipe, and the water is

replaced with the same quantity of cold water, supplied from the tank vessel load pipe, this way reducing the

excessive heat.

SAFETY VALVE FROM 1,5bar: maximum operation pressure allowed for the system is 1,5 bar (equal to 15m

of the water column). Higher pressures can cause deformation and breakage of the boiler body.

SAFETY DEVICES envisioned by Regulations in vigour.

CIRCULATION PUMP : preferably fitted on the return pipes to avoid diffusion of extremely high temperature

water, however ensure that it does not make water circulate in the open vessel tank as this would cause

continuous oxidation of water which would quickly corrode the boiler body.

It must also be connected electronically so that it will only work when the water temperature reaches 65-70° C. To

achieve this one can use the electronic control unit, available as an OPTIONAL with the thermo stove, or by

using a sleeve thermo switch fitted directly on the flow pipe and calibrated at 65-70° C.

8. AUTOMATIC THERMOSTATIC MIXING VALVE – (see chapter 3.3)

IMPORTANT: temperature safety sensors must be in place on the machine at a distance no greater than 30 cm from

the flow connection of the thermo-product.

Whenever the thermo products lack a device, those missing can be installed on the thermo product flow pipe, within a

distance no greater than 1m from the thermo product.

ATTENTION: For no reason must the fire be ignited before the system has been completely filled with water;

doing this would lead to serious damage of the entire structure. The system must be filled by

means of the loading pipe directly from the open vessel tank in a way to prevent an excessive water

pressure network deforming the body of the thermoheating stove.

The system must be kept constantly full of water even during the periods when the use of the thermoheating stove is

not requested. During the winter, inactivity must be faced with the addition of antifreeze.

3.2.