Grundfos SPKE Series, Инструкция по установке и эксплуатации

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English (US)
12
6.6 Bus connection cable
6.6.1 New installations
For the bus connection, use a screened 3-core cable with a
conductor cross-section of 28AWG - 16AWG.
• If the pump is connected to a unit with a cable clamp which is
identical to the one on the pump, connect the screen to this
cable clamp.
• If the unit has no cable clamp as shown in fig. 16, leave the
screen unconnected at this end.
Fig. 16
Connection with screened 3-core cable
6.6.2 Replacing an existing pump
• If a screened 2-core cable is used in the existing installation,
connect it as shown in fig. 17.
Fig. 17
Connection with screened 2-core cable
• If a screened 3-core cable is used in the existing installation,
follow the instructions in section
6.6.1 New installations on
page 12.
7. Modes
Grundfos E-pumps are set and controlled according to operating
and control modes.
7.1 Overview of modes
1) For this control mode the pump is equipped with a pressure
sensor. The pump may also be equipped with a temperature
sensor in which case the description would be constant
temperature in control mode controlled.
7.2 Operating mode
When the operating mode is set to
Normal,
the control mode can
be set to controlled or uncontrolled. See section
7.3 Control mode
on page 12.
The other operating modes that can be selected are
Stop
,
Min.
or
Max.
•
Stop
: the pump has been stopped
•
Min.
: the pump is operating at its minimum speed
•
Max.
: the pump is operating at its maximum speed.
Figure 18 is a schematic illustration of min. and max. curves.
Fig. 18
Min. and max. curves
The max. curve can for instance be used in connection with the
venting procedure during installation.
The min. curve can be used in periods in which a minimum flow is
required.
If the power supply to the pump is disconnected, the mode setting
will be stored.
The remote control R100 offers additional possibilities of setting
and status displays. See section
10. Setting by means of R100
on
page 14.
7.3 Control mode
7.3.1 Pumps without factory-fitted sensor
The pumps are factory-set to control mode
uncontrolled
.
In control mode uncontrolled, the pump will operate according to
the constant curve set, fig. 19.
Fig. 19
Pump in control mode
uncontrolled
(constant curve)
7.3.2 Pumps with pressure sensor
The pump can be set to one of two control modes, i.e. controlled
and uncontrolled, fig. 20.
In control mode
controlled
, the pump will adjust its performance,
i.e. pump discharge pressure, to the desired setpoint for the
control parameter.
In control mode
uncontrolled
, the pump will operate according to
the constant curve set.
T
M
02
88
4
1 09
0
4
TM
02 88
42 090
4
Operating modes
Normal Stop Min. Max.
Control modes
Uncontrolled Controlled
Constant
curve
Constant
pressure
1)
A
Y
B
A
Y
B
1
2
3
1
2
3
Pump
A
Y
B
A
Y
B
1
2
1
2
Pump
TM
00
55
47
09
95
T
M
00
77
46
13
04
Q
H
Max.
Min.
H
Q
DBP-1 - GRUNDFOS PUMP CRE - 99392005