Anti-Condensation Heater Connection; Commissioning; Initial Commissioning - Wilo CronoLine-IL Notice De Montage Et De Mise En Service

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7.3 Anti-condensation heater
connection
8

Commissioning

Safety
Preparation
8.1

Initial commissioning

46
We recommend an anti-condensation heater for motors which, due
to climatic conditions, are at a risk of condensation (e.g. stationary
motors in moist atmospheres, or motors exposed to extreme varia-
tions in temperature). Corresponding motor variations, which are
equipped with an anti-condensation heater at the factory, can be
ordered as a special version. The anti-condensation heater is used to
protect the motor windings against condensation water inside the
motor.
• The anti-condensation heater is connected to the terminals HE/HE
in the terminal box (connection voltage: 1~230 V/50 Hz).
CAUTION! Risk of material damage!
Risk of damage due to incorrect handling.
• The anti-condensation heater may not be switched on during
motor operation.
DANGER! Risk of fatal injury!
Failure to install safety devices on the terminal box or near the
coupling can cause electrical shock or contact with rotating parts,
potentially resulting in life-threatening injuries.
• Before commissioning, all safety devices (such as terminal box
covers or coupling covers) that were removed must be reinstalled.
• Keep a safe distance from the pump during commissioning.
WARNING! Danger of injury!
If the pump/system is installed incorrectly, fluid may be ejected
during commissioning. Individual components may also become
loose.
• Keep a safe distance from the pump during commissioning.
• Wear protective clothing, protective gloves and protective goggles.
The pump has to reach ambient temperature before commissioning.
• Check whether the shaft can be rotated without any grinding. In case
the impeller is blocked or grinds, loosen the coupling screws and
tighten them with the specified torque (see list "Tab. 5: Screw tight-
ening torques" on page 54).
• Prime and vent the unit correctly.
WARNING! Danger due to extremely hot or extremely cold pressur-
ised fluid!
Depending on the temperature of the fluid and the system pres-
sure, when the venting screw is opened completely, extremely hot
or extremely cold fluid in liquid or vapour form may escape or shoot
out at high pressure.
• Always exercise caution when opening the venting screw.
CAUTION! Risk of material damage!
Dry running will destroy the mechanical seal.
• Make sure that the pump does not run dry.
To avoid cavitation noises and damage, a minimum inlet pressure
must be guaranteed at the suction port of the pump. This minimum
inlet pressure depends on the operation situation and the duty point
of the pump, and must be defined accordingly.
The main parameters for defining the minimum inlet pressure are the
NPSH value of the pump at its duty point and the vapour pressure of
the fluid.
WILO SE 07/2018