Twin-Head Pump Installation/Y-Pipe Installation - Wilo Yonos GIGA2.0-I Installation And Operating Instructions Manual

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6.5.2 Condensate drainage/Insulation
Fig. 17: Permitted installation positions with
horizontal shaft
6.6 Twin-head pump installation/Y-
pipe installation
30
Installation
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When the pump is used in air-conditioning or cooling systems:
The condensate that forms in the lantern can be drained specifically via an existing
drilled hole. A drain pipe can also be connected to this opening and a small amount
of escaping liquid can be drained off.
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The motors are equipped with condensation water holes which are closed with a
rubber plug at the factory. The rubber plug is used to guarantee that protection
class IP55 is fulfilled.
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Use of the pump in air-conditioning or cooling systems:
To allow condensation water to drain off, the rubber plug must be removed down-
wards.
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With a horizontal motor shaft, the condensate hole must be positioned towards
the bottom (Fig. 17, Item 2). If necessary, the motor must be turned.
CAUTION
If the rubber plug is removed, protection class IP55 is no longer ensured!
NOTICE
When systems are insulated, only the pump housing may be insulated. Lantern, drive
and differential pressure sensor are not insulated.
An insulation material without ammonia compounds must be used as insulation mater-
ial for the pump. This prevents stress corrosion cracking on the union nuts of the differ-
ential pressure sensor. Otherwise, direct contact with the brass screw connections must
be avoided. Stainless steel screwed connections are available for this as an accessory.
As an alternative, corrosion protection tape (e.g. insulating tape) can also be used.
A twin-head pump can either be a pump housing with two pump drives or two single
pumps operated in one Y-piece.
NOTICE
For twin-head pumps in a twin-head pump housing, the pump on the left in the dir-
ection of flow is configured as the main pump at the factory. The differential pres-
sure sensor is mounted on this pump. The Wilo Net bus communication cable is also
mounted and configured on this pump at the factory.
WILO SE 2022-05