Kalvis 4 - Page 14

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• In order to avoid condensate formation in the boiler which can drastically
shorten the boiler’s life, install the heating system maintaining no less than
60 ºC return water temperature.
• Emergency cooling valve is used to protect the boiler from overheating.
When boiler temperature is close to the dangerous limit, the valve opens
and discharges hot water into sewage at the same time refilling the heating
system with cold tap water. When temperature in the boiler becomes non-
hazardous, valve closes and heating system operates as usual. Technical
specifications of the emergency cooling valve:
- opening temperature: 97 °C (+/-2) °C;
- maximum permissible temperature: 120 °C;
- maximum pressure in the heating system: 4 bar;
- maximum pressure in the water supply system: 6 bar;
- water flow at 1 bar pressure difference: 1,8 m³/h, at 110 °C.
Install the emergency cooling valve as close to the branch pipe of
outflowing water from the boiler as possible.
In the open type heating system, install the pump on the return water
pipe.
• Install in the system the water discharge pipe to discharge water from the
system in the case of system freezing risk or during boiler repairs;
• During installation, weld onto the outflowing water pipe, in the well-
visible place, a coupling with G½B thread, used to connect the
completed thermomanometer.
• Fill the boiler with desalinated, soft or at least rain water. If using prepared
“soft” water in the system, the boiler body will serve longer.
• It is recommended to have the boiler inspected annually by a qualified
boiler maintenance expert.