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4.4 ADDITIONAL
SAFETY
AGAINST
OVER-HEATING
To ensure safety against high temperatures on boiler and heating system, a cooling loop
(safety heat exchanger) with activating valve must be installed. Safety heat exchanger includes
the following items:
1. Safety heat exchanger (copper serpantine integrated with outlet stub pipe)
2. Safety valve
3. Auxillary fittings / flexible hose
If the boiler water temperature exceeds 95
o
C, thermostat of the safety valve lets cold sanitary
water flows through the serpentine of the safety heat exchanger. Serpentine with cold water
circulating inside cools down the boiler water temperature. When the boiler temperature
decreases below the safe degree, safety valve shuts the cold sanitary water circulation, and
the boiler goes back to normal operation.
The valves on the sanitary connections of safety heat exchanger must always be kept
open.
Boiler can only be used with original safety heat exchanger kit which is tested and
approved for each boiler model. The safety valve could be purchased separately if it is
not included in the kit.
Cold water must never be delivered directly to boiler inlet in order to solve overheating
problems as this will result in serious damage on boiler body. That application will end
the warranty of the boiler.
4.5 WARNING
ON
WATER
LEVEL
IN
THE
SYSTEM
After first water make-up in the system, minimum water level must be marked on hydrometer
for open vented circuits, minimum water pressure level must be marked on manometer for
pressurized circuits. Water level or pressure should be checked daily, and water should
added to circuit if they are below the minimum value. During first water make-up, oxygen
must be fully discharged from the system. Generally, oxidation will not be a problem, if all
measures are taken into account during first water make-up. Oxidation will take place
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