Twin-Head Pump Installation/Y-Pipe Installation - Wilo Yonos GIGA2.0-I Einbau- Und Betriebsanleitung

6.5.2 Condensate drainage/Insulation
Fig. 17: Permitted installation positions with
horizontal shaft
6.6 Twin-head pump installation/Y-
pipe installation
Installation and operating instructions • Wilo-Yonos GIGA2.0-I/-D • Ed.01/2023-03
For higher temperatures, the values must be corrected as follows depending on the ratio of
their modulus of elasticity:
E / E
t, EN-GJL 20, EN-GJL
E = Modulus of elasticity grey cast iron at the selected temperature
t, EN-GJL
E = Modulus of elasticity grey cast iron at 20 °C
20, EN-GJL
When using the pump 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.
• 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 ful-
filled.
• To allow condensation water to drain off, the rubber plug must be removed downwards.
• With a horizontal motor shaft, the condensate hole must be positioned towards the bot-
tom (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.
NOTICE
Pump housing, lanterns and attached parts (e.g. differential pressure
sensor) must be protected against icing from the outside.
In case of very heavy condensation, the surfaces of the lantern that are heavily wetted by
condensation can also be additionally insulated (direct insulation of the individual surfaces).
Ensure that the condensate drains out of the hole in the lantern.
If service is necessary, the dismantling of the lantern must not be obstructed. The following
components must always be freely accessible:
• Air vent valve
• Coupling
• Coupling guard
An insulation material without ammonia compounds must be used as insulation material for
the pump. This prevents stress corrosion cracking on the union nuts of the differential pres-
sure 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 direction of flow is configured as the main pump at the factory.
The differential pressure sensor is mounted on this pump. The Wilo Net
bus communication cable is also mounted and configured on this pump
at the factory.
en
139