Pump Insulation In Heating, Refrigeration And Air-Conditioning Systems; Electrical Connection - Wilo Yonos PARA High Flow Série Notice De Montage Et De Mise En Service

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ig.
DN 40, 50
Screw diameter
Strength class
Permitted tightening torque
Min. screw length for
• DN 40
• DN 50
• Install appropriate flat gaskets between pump and counter flanges.
• Tighten the flange bolts crosswise in two steps to the prescribed tightening torque
(see Table 7.1.2).
• Step 1: 0.5 x permissible tightening torque
• Step 2: 1.0 x permissible tightening torque
• Check the flange connections for leaks.

7.1.3 Pump insulation in heating, refrigeration and air-conditioning systems

WARNING! Risk of burns!
The entire pump can become very hot. When retrofitting the insulation during normal
operation there is a risk of burns.
• Thermal insulation shells (optional accessories) are only permissible in heating applica-
tions with fluid temperatures starting from +20°C, since these thermal insulation shells
are not diffusion-proof when enclosing the pump housing. Install a thermal insulation
shell before commissioning the pump.
• For applications in refrigeration and air-conditioning systems, Wilo-Cooling Shell diffu-
sion-proof thermal insulation shells or other commercially-available diffusion-proof
thermal insulation materials must be used.
CAUTION! Risk of damage to property!
If the diffusion-proof insulation is fitted at the site, the pump housing may only be insu-
lated up to the motor's separation joint. The condensate drain grooves must remain unob-
structed to ensure that condensate that develops in the motor can drain without problems
(fig. 7). Condensate that accumulates in the motor can cause an electrical defect.
7.2

Electrical connection

DANGER! Risk of fatal accident!
Improper electrical connections pose a risk of fatal injury due to electric shock.
• Only allow the electrical connection to be made by an electrician approved by the local
power supply company and in accordance with the local regulations in force.
• Before working on the pump, all poles of the power supply must be disconnected.
Work on the pump/control module may only be started after 5 minutes have elapsed
due to the dangerous residual contact voltage.
• Check to ensure that all connections (including potential-free contacts) on the plug
are voltage-free. To do this, the plug must be opened.
• If the control module/plug is damaged, the pump must not be put into operation.
• If setting and operating elements are improperly removed, there is a danger of electric
shock if interior electrical components are touched.
• Connecting the pump to an uninterrupted power supply (UPS or IT power supply) is
prohibited.
30
Nominal pressure PN6
M12
4.6 or higher
40 Nm
55 mm
60 mm
Nominal pressure PN10
M16
4.6 or higher
95 Nm
60 mm
65 mm
WILO SE 01/2018