Double Pump; Installation And Electrical Connection; Installation - Wilo Yonos MAXO-D Installation And Operating Instructions Manual

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6.3

Double pump

For a twin-head pump, the two motor impeller units are fitted identically and accommo-
dated in a common pump housing. Each of the two pumps produces the same output.
For an automatic fault-actuated switchover, a corresponding switchgear must be pro-
vided on-site.
NOTE:
• In the case of a double pump, if both individual pumps have an automatic fault-actuated
switchover, either the preselected control mode and delivery head setpoint or the speed
stage setting of both pumps must be identical.
• Parallel operation for a double pump or two individual pumps is not permissible, since the
pumps can interfere with each other's operating behaviour.

7 Installation and electrical connection

DANGER! Risk of fatal accident!
Improper installation and electrical connection can result in fatal injury. Danger from
electrical current must be eliminated.
• Installation and electrical connection may only be carried out by qualified personnel
and in accordance with the applicable regulations.
• Accident prevention regulations must be observed!
• Comply with the regulations of the local power supply company!
Pumps with pre-assembled cable:
• Never pull on the pump cable!
• Do not kink the cable.
• Do not place any objects on the cable.
7.1

Installation

WARNING! Danger of personal injury!
Incorrect installation can result in injuries.
• There is a crushing hazard!
• There is a risk of injury due to sharp edges/burrs. Wear appropriate protective clothing
(e.g. safety gloves)!
• There is a risk of injury hazard due to the pump/motor falling.
Use suitable lifting gear to secure the pump/motor against falling.
CAUTION! Risk of damage to property!
Incorrect installation can result in damage to property.
• Only have installation work performed by qualified personnel.
• Observe national and regional regulations.
• When the pump needs to be transported, it may be carried only by the motor/pump
housing. Never by the control module or cable.
• Installation within a building
Install the pump in a dry, well ventilated and dust-free room – according to the protection
class (see pump rating plate). Ambient temperatures below -20°C are not permissible.
• Installation outside a building (outdoor installation):
• Install the pump in a sump (e.g. light sump, ring sump) with a cover or in a cabinet/hous-
ing as weather protection. Ambient temperatures below -20°C are not permissible.
• Avoid exposure of the pump to direct sunlight.
• The pump requires protection so that the condensate drain grooves are not contami-
nated (fig. 7).
8 WILO SE 03/2015