Grundfos ALPHA2 User Manual

16
8. Automatic Night SetBack
Contents:
8.1 Basis for Automatic Night SetBack
8.2 Function of Automatic Night SetBack.
8.1 Basis for Automatic Night SetBack
Fig. 10 Automatic Night SetBack
TM03 8929 2707
Warning
Pumps built into gas boilers with a small water content must never
be set to Automatic Night SetBack.
Note
If speed I, II or III is selected, the Automatic Night SetBack is
deactivated.
Note
It is not necessary to reactivate Automatic Night SetBack if the
electricity supply has been switched off.
If the electricity supply is switched off when the pump is running on
the curve for Automatic Night SetBack, the pump will start in normal
operation. See 11. Pump settings and pump performance.
The pump changes back to the curve for Automatic Night SetBack
when the condition for Automatic Night SetBack is fulfilled again.
See 8.2 Function of Automatic Night SetBack.
Note
If the heating system is "undersupplied" (insufficient heat), check
whether Automatic Night SetBack is activated. If yes, deactivate this
function.

Grundfos ALPHA2 Specifications

General

Max Head	8 m
Voltage	230 V
Frequency	50/60 Hz
Type	Circulator Pump
Max. operating pressure	10 bar
Series	ALPHA2
Connection Type	Threaded
Protection Class	IP42
Liquid Temperature Range	2°C to 110°C
Energy Efficiency Index	≤ 0.23
Connection size	G 1 1/2
EEI	≤ 0.23