Electrical Connection - Wilo CronoLine-IL-E Einbau- Und Betriebsanleitung

English
Pumping out of a tank
Condensate draining, insulation
7.3

Electrical connection

Safety
84
Σ F and Σ M
effective effective
ues of both pump flanges (inlet and outlet). Σ F
M are the arithmetic sums of the maximum permitted
max. permitted
values of both pump flanges (inlet and outlet). The algebraic signs of
Σ F and Σ M are not taken into consideration in the compensation
equation.
Influence of material and temperature
The maximum permissible forces and torques apply for the grey cast
iron base material and for an initial temperature value of 20 °C.
For higher temperatures, the values must be corrected as follows
depending on the ratio of their modulus of elasticity:
E / E
t, EN-GJL 20, EN-GJL
E = Modulus of elasticity grey cast iron at the selected temper-
t, EN-GJL
ature
E = Modulus of elasticity grey cast iron at 20 °C
20, EN-GJL
NOTICE:
When pumping out of a tank, ensure that the liquid level is always
high enough above the suction port of the pump so that the pump
never runs dry. The minimum inlet pressure must be observed.
• When the pump is used in air-conditioning or cooling systems, the
condensation that forms in the lantern can be drained specifically via
an existing hole. A drain pipe can be connected at this opening. Small
amounts of fluid leakage can be also drained off.
The motors are equipped with holes for condensation which are
sealed with plastic plugs at the factory (in order to guarantee that
protection class IP 55 is achieved).
• If used in air-conditioning/cooling systems, this plug must be
removed downwards so that condensation water can drain.
• With a horizontal motor shaft, the condensate hole must be posi-
tioned towards the bottom (Fig 18, Item 2). If necessary, the motor
must be turned accordingly.
NOTICE:
If the plastic plug is removed, protection class IP 55 is no longer ensured.
NOTICE:
In the case of insulated systems, only the pump housing may be insu-
lated, not the lantern, drive and differential pressure sensor.
An insulating material which does not contain ammonia compounds
must be used when insulating the pump, in order to prevent stress cor-
rosion cracking of the union nuts. If this is not possible, direct contact
with the brass screw connections must be avoided. Stainless steel
screwed connections are available for this as an accessory. As an alter-
native, corrosion protection tape (e.g. insulating tape) can also be used.
DANGER! Risk of fatal injury!
Incorrect electrical connections can cause fatal electric shocks.
• Have the electrical connection set up by an electrician approved by
the local electricity supplier only and in accordance with local
regulations.
• Observe the installation and operating instructions for the
accessories!
are the arithmetic sums of the effective val-
max. permitted
and Σ
WILO SE 08/2022