39
ANTI-FREEZE FUNCTION
When the delivery probe detects a temperature below 7°C, the circulator is activated. If the
temperature drops below 4°C, the main exchanger is switched on until the delivery
temperature is raised to 20°C. The anti-freeze function is also active when the boiler is
OFF (in stand-by mode but with the illuminated main switch on).
CIRCULATOR LOCK PREVENTION
When the circulator has not performed an operation cycle in a 24h period, it is activated for
10 sec. to avoid locking due to long period of inactivity.
GRUNDFOS UPM3 "K" FLEX-AS
Version 2020 PUMP INSTRUCTIONS
The new FLEX-AS (K) pump version 2020 has three manually adjustable speeds and 4
flow rate reductions (with speed reduction) via the PWM signal, which can be set from the
boiler control panel. A total of ten circulator speeds can be set, with ten corresponding
separate flow rates.
Pump programming
Manually select the maximum speed profile using the
key, then use the boiler control
panel to select the parameter
idx:
010
and choose one of the four flow rates available
for each speed, setting the values from 1 to 4. Set 1 for minimum flow rate, or 4 for
maximum flow rate, set 2 and/or 3 for intermediate flow rates. According to the diagram in
the table above, the maximum value of each speed is represented by the LED flashing
once per second (parameter
idx:
010
set to value
4
); when PWM programming is
activated, from value 3 to 1 the green LED flashes with a frequency of 8 flashes/second.
The maximum speed is indicated by the first Yellow LED under the
III
symbol, the
intermediate speed by the second Yellow LED under the
II
symbol, and the first speed by
the third Yellow LED under the
I
symbol (front view, from left to right).
Summary of Contents for Silver Touch Elektra Compact 12 kW N
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