Fiamma Elektra 18 kW N 016 TROLLEY User And Maintenance Manual - page 21
When the user closes the contact of the room thermostat, the system requests the setting of
the system design temperature that will be used for the execution of the second part of the test
(t.1b = test 1 - second part) according to UNI EN 1264-4, paragraph 4.1.4, with a duration of 96 hours.
With the keys
+
I
(J2) and
-
I
(J3) you set the project value for the system, then when the
MODE (J4) key is pressed, the system starts the first part of the test (t.1A = test 1 - first part)
or for 72 hours the delivery temperature is kept at a value of 23°C (from 20°C to maximum 25°C).
The circulator is activated when the temperature of 20°C is exceeded (anti-condensation).
When the circulator is not active, the system heats the main heat exchanger with a maximum
power of 6 kW. The operating hours count is when the temperature measured by the primary
exchanger probe has a value above 20°C and stops if it falls below this threshold. The system
memorizes the elapsed test time with a resolution of 15 minutes. On the display the wording
t.1A alternates with the number of test hours performed (xxxh). When the temperatures is below
20°C, the number of hours is replaced with the word "---" to indicate that the count is not advanced.
The modulation bar is displayed at the end of the pre-heating phase of the primary exchanger.
Once the 72 hours of testing have been completed, the system automatically modifies the set-point
to be followed at the value set before starting the test (design temperature). The display shows
that the second part of the test is being executed with the text t.1b. The test hours counting continues
from the value of 72 hours of the first part only if the temperature measured by the probe of the
main heat exchanger is greater than or equal to the design temperature, the other way around the
number of hours is replaced with the words "---" to indicate that the count does not advance. During
this part of the test, the system follows the set-point value set to + 1°C and stops the power resistors
if the measured temperature exceeds the set-point by 3°C. At the end of the 168 hours that make up
the test 1(72 hours for part a and 96 hours for b), the system stops the power resistors and the
system circulator. At this point the user is asked to set a set-point in hours (time). This time is used,
if necessary, for the continuation of the test (t. 2 test 2) at the design temperature of the system.
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