Grundfos TPE Series - Operating Conditions; Ambient Temperature

English (GB)
12
7.7 Bus connection cable
7.7.1 New installations
For the bus connection, use a screened 3-core cable
with a cross-sectional area of minimum 0.5 mm
2
and
maximum 1.5 mm
2
.
If the motor is connected to a unit with a cable clamp
which is identical to the one on the motor, connect
the screen to this cable clamp.
If the unit has no cable clamp, leave the screen
unconnected at this end. See fig. 10.
Fig. 10 Connection with screened 3-core cable
7.7.2 Replacing a motor
• If you have used a screened 2-core cable in the
existing installation, connect the cable as shown
in fig. 11.
Fig. 11 Connection with screened 2-core cable
• If you have used a screened 3-core cable in the
existing installation, follow the instructions in
section 7.7.1 New installations.
8. Operating conditions
8.1 Maximum number of starts and stops
The number of starts and stops via the power supply
must not exceed four times per hour.
When switched on via the power supply, the pump
starts after approximately 5 seconds.
If a higher number of starts and stops is desired, use
the input for external start-stop when starting or
stopping the pump.
When started via an external on/off switch, the pump
starts immediately.
8.2 Alternating operation of twin-head
pumps
On twin-head pumps, the duty and backup pumps
must be alternated on a regular basis, i.e. once a
week, to ensure an even distribution of the operating
hours on both pumps. The pumps alternate
automatically. See section 13.43 "Multipump setup"
(Setup of multi-pump system).
If twin-head pumps are used for pumping domestic
hot water, the duty and backup pumps must be
alternated on a regular basis, i.e. once a day, to
avoid blocking of the backup pump due to deposits
such as calcareous deposits. As default, the pumps
alternate automatically. See section
13.43 "Multipump setup" (Setup of multi-pump
system).
8.3 Ambient temperature
8.3.1 Ambient temperature during storage and
transportation
Minimum: -30 °C
Maximum: 60 °C.
8.3.2 Ambient temperature during operation
The motor can operate with the rated power output,
P2, at 50 °C, but continuous operation at higher
temperatures reduces the expected product life. If
the motor is to operate at ambient temperatures
between 50 and 60 °C, select an oversized motor.
Contact Grundfos for further information.
TM05 3973 1812TM02 8842 0904
A
Y
B
A
Y
B
1
2
3
1
2
3
Motor
A
Y
B
A
Y
B
1
2
1
2
Motor
3 x 200-240 V 3 x 380-500 V
Minimum -20 °C -20 °C
Maximum 40 °C 50 °C