Grundfos UPS 200 Serie Instrucciones De Instalación Y Funcionamiento página 4

1. Relay module set for twin-head
pumps
Before removing the terminal box mod-
ules, these Fitting Instructions should be
studied carefully. The installation and op-
eration should also be in accordance with
local regulations and accepted codes of
good practice.
Note: Pumps with modules must not be connected to
a frequency converter.
The set includes:
• 2 relay modules with screws and screwdriver.
• 2 screwed cable entries.
• 1 intermediate cable.
• 2 wiring diagrams for the terminal box covers.
When fitted with relay modules, the twin-head pump
can be connected directly to a mains switch as it will
be protected by the built-in overload protection at all
three speeds.
The relay modules incorporate two indicator lights,
see fig. 1, and a signal output in the terminal block.
2. Signal output
By means of a selector switch, see fig. 1, the signal
output can be set to activation during:
Operation: The output is activated when
the pump is operating.
Fault: The output is activated in case of
fault.
Alternating operation: Use this setting
when the pumps are to operate alternately
as duty and standby pump.
The function of the signal output is shown in the ta-
ble in section 6. Indicator lights and signal output.
3. Indicator lights
The relay modules have a green and a red indicator
light. The function of the indicator lights is shown in
the table in section 6. Indicator lights and signal out-
put.
4. Operating modes of twin-head
pumps
Three operating modes are possible:
1. Alternating operation. The pumps operate al-
ternately as duty and standby pump.
2. Standby operation. One pump operates con-
stantly as duty pump and the other constantly as
standby pump.
3. Single-pump operation. The pumps operate in-
dependently of each other, possibly with exter-
nal operating or fault indication.
4
5. Intermediate cable
In alternating operation and standby operation, the
terminal blocks of the relay modules must be con-
nected via the 4-core cable supplied. The cable is
led into each of the terminal boxes by means of the
screwed cable entries, see fig. 2.
Fig. 1
Indicator lights
Selector switch
for signal output
Fig. 2
Intermediate cable
Pump 2 (P2)
Pump 1 (P1)