Further Settings; Setting Type Of Control (A1) - ITT A 14 Montage- Und Betriebsanleitung

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english
Regulation cycle
english

5.5 Further settings

A) Control keyboard
B)
Company nameplate
Danger of burns!
At high media temperatures the pump
can become so hot that only the control keys
can be touched.
A1) Control button
for setting type of regulation and display (LED)
see section 5.4.1
A2) Control keys for setting (delivery head)
with illuminated symbols (LED) to indicate delivery head
LED
.
and flowrate
V
Refer to 5.4.2
A3) Illuminated symbol fault, external operation (Ext)
Refer to 5.4.3

5.5.1 Setting type of control (A1)

S
Control key «S»
Proportional pressure is recommended for most
twin-pipe systems, particularly with radiators
Constant pressure can be useful in the following
systems:
Former gravity heating with very little pressure loss.
Primary circuit pumps in systems
with little pressure loss.
Floor heating with thermostat valves
and single pipe heating.
Constant speed
Pump rotates at constant speed between
1400 and 3500 rpm
Automatic minimum speed
If the initial temperature in the system decreases
by 10 to 15 °C, the pump output is reduced to (min )
after approx. 1 - 2 h.
Aut.
If the initial temperature rises by 10°C, changeover is
made immediately to regulated operation.
LED lit:
LED flashing: pump is in minimum speed condition
Automatic minimum speed do not use
Attention
with wood heaters, gas heaters, water heaters,
storage charging, district heating, heat pumps, etc.
preselected
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