Camus Hydronics BLUE-FLAME Series, Инструкция по установке, эксплуатации и обслуживанию

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7. SAFETY DEVICES
7.1 WATER FLOW SWITCH (shipped loose)
A water flow switch is shipped loose and is to be installed in the outlet piping on all heating
boilers and hot water supply boilers. The flow switch is wired in series with the 24VAC safety
control circuit. A diagnostic light will be indicated on the control display on a low flow condition.
7.2 LOW WATER CUTOFF (If Equipped)
If this boiler is installed above radiation level, a low water cut-off device must be installed at the
time of boiler installation. Some local codes require the installation of a low water cut-off on all
systems. Electronic low water cut-offs are available as a factory supplied option on all models.
Low water cut-offs should be tested every six months. The normally open switch contact of the
low water cutoff is to be wired in series with the flow switch. A diagnostic light will be indicated
on the control display on a low flow condition. Caution: remove jumper when connecting to 24
VAC circuit.
7.3 RELIEF VALVE (shipped loose)
This appliance is supplied with a relief valve sized in accordance with ASME Boiler and
Pressure Vessel Code, Section IV (“Heating Boilers”). The relief valve is to be installed in the
vertical position and mounted in the hot water outlet. No valve is to be placed between the relief
valve, and the appliance. To prevent water damage, the discharge from the relief valve shall be
piped to a suitable floor drain for disposal when relief occurs. No reducing couplings or other
restrictions shall be installed in the discharge line. The discharge line shall allow complete
drainage of the valve and line. Relief valves should be manually operated at least once a year.
8. FREEZE PROTECTION
Boiler installations are not recommended in areas where the danger of freezing exists unless
precautions are taken. Maintaining a mixture of 50% water and 50% propylene glycol is the
preferred methods of freeze protection in hydronic systems. This mixture will protect the boiler
to approximately -35 °F (-37 °C). To maintain the same temperature rise across the boiler
increase the G.P.M. flow by 15% and the head loss by 20%.
A snow screen should be installed to prevent snow and ice accumulation around the boiler.
Regular inspections should be made to ensure that air intake and vent are free of snow and ice.