RHOSS ELECTA Series, Instructions For Use Manual, Page: 298 / 344

1.5 OPERATING LOGIC
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Managing the alarms that protect the radiant system.
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Set point 2 is enabled, ELECTA will produce water at the "second set point", i.e. at a temperature suited to fancoil operation. In this case, if you also
wish to supply a radiant system, it will be necessary to install the Mixing valve, as described above. By doing so, ELECTA will continue to produce
water at the "second set point" (reference temperature: water coming out of the PdC, par. 109), but the Mixing valve will adjust to bring the water to
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1. Maximum water temperature in the radiant system, during heating = par. 224 “tMA”
2. Minimum water temperature in the radiant system, during cooling.
a Calculated value = par. 229 “tLiM”
The dew temperature is determined by the ambient temperature and humidity detected by the KCTR (par 226). This value is then corrected
based on parameter 227, to take into account the type structure of the radiant system, through formula: par.229 = par.226 + par.227.
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b Set value = par 228 “tMin”
If the KCTR is not available, or if parameter 225=On, this is used as the minimum level.
1. Alarm “Surr”
The overheating alarm comes on if all of the following conditions subsist for more than three minutes:
• Heating function
• No domestic hot water heating
• If par. 110 = 1: The temperature of the water delivered to the radiant system (par. 111) exceeds the Set point by 2°C
•
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point by 2°C.
When this alarm is triggered, the following applies:
• If par. 110 = 1: Pump 2 stops
•
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The alarm resets automatically as soon as one of the activation conditions fails.
2. "Cond" alarm
The condensation formation alarm is triggered if:
a both of the following conditions subsist:
• Cooling function
• The IN-COM terminals of the Dew Point Sensor short circuit
b if all of the following conditions subsist for more than 3 minutes:
• Cooling function
• Se par. 110 = 1: The temperature of the water delivered to the radiant system (par. 111) is lower than the minimum water temperature (par.
228 / 229).
•
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the minimum water temperature (par. 228 / 229).
When this alarm is triggered, the following applies:
• If par. 110 = 1: Pump 2 stops
•
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The alarm resets automatically as soon as one of the activation conditions fails.
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