Insulation Of The Pump In Cooling/Air-Conditioning Systems; Electrical Connection - Wilo TOP-S Instrucciones De Instalación Y Funcionamiento

7.1.3 Insulation of the pump in cooling/air-conditioning systems

• The series TOP-S/-SD/-RL/-I are suitable for use in refrigeration and air-condi-
tioning systems with fluid temperatures down to -20 °C.
• The thermal insulation shells included in the scope of delivery of single pumps
may however only be used in heating systems at fluid temperatures of +20 °C
or higher, since these thermal insulation shells do not enclose the pump housing
in a diffusion-proof manner.
• For applications in refrigeration and air-conditioning systems commercially-
available diffusion-proof thermal insulation materials must be used.
CAUTION! Risk of damage to property!
If the diffusion-proof insulation is applied by the customer, the pump hous-
ing may be insulated only up to the motor separation joint, so that the con-
densate drain openings remain open and allow the condensate accumulating
in the motor to flow out without obstruction (fig. 6). Otherwise condensate
can accumulate in the motor, eventually causing an electrical defect.

7.2 Electrical connection

DANGER! Risk of fatal injury!
Improper electrical connections pose a risk of fatal injury due to electric
shock.
• Only allow the electrical connection and all associated activities to be made
by an electrician approved by the local power supply company and in accord-
ance with the local regulations in force.
• Before working on the pump, all poles of the power supply must be discon-
nected. Because voltages hazardous to persons persist for some time (in
condensers), no work may be commenced on the module until 5 minutes
have elapsed (applies only to 1~ systems). Check to ensure that all connec-
tions (including potential-free contacts) are voltage-free.
• Do not operate the pump if the module/terminal box is damaged.
• If the setting and operating elements on the module/terminal box are inad-
missibly removed, there is a danger of electric shock by touching the electri-
cal components located inside.
CAUTION! Risk of damage to property!
An incorrect electrical connection can cause damage to property.
If the wrong voltage is applied, the motor can be damaged!
• The current type and voltage of the mains connection must correspond to the
specifications on the rating plate.
• The electrical connection must be established via a fixed connection line
equipped with a connector device or an all-pole switch with a contact opening
width of at least 3 mm.
• Mains-side fuse protection: 10 A, slow.
Installation and operating instructions Wilo-TOP-S/-SD/-RL/-I
English
35