Improper Use; Description Of Product And Accessories; Installation And Operating Instructions; Assembly And Installation - Wilo Economy-MHI Instrucciones De Instalación Y Funcionamiento

2.8 Improper use

The operating safety of the supplied product is only
guaranteed for conventional use in accordance with
Section 4 of the operating instructions. The limit val-
ues must on no account fall under or exceed those
values specified in the catalogue/data sheet.
3. Transport and temporary storage
When receiving the material, check that there has
been no damage during the transport. If shipping
damage has occurred, take all necessary steps
with the carrier within the allowed time.
CAUTION! Outside influences may cause dam-
ages. If the delivered material is to be installed
later on, store it in a dry place and protect it from
impacts and any outside influences (humidity,
frost etc.).

4. Description of product and accessories

4.1 Pump description (Fig. 1)
The pump is a multistage (2-6 stage) normal suction,
horizontal high pressure centrifugal pump with a
block design with horizontal inlet (1) and vertical
pressure glands (2).
The hydraulic section is equipped with the given
number of stage housings (5) and impellers (6) in
a modular construction. The impellers are fitted
on a single motor-pump shaft (7). The pres-
sure casing (8) surrounding the hydraulic section
guarantees a fail-safe seal. All parts in contact
with the fluid, such as stage chambers, impellers
and the pressure casing, are made of chromium ni-
ckel steel. The shaft hole through the pump casing
is sealed to the motor with an mechanical seal (9).
E = All parts in contact with the fluid have
been cleared by WRAS and are therefore sui-
table for use with drinking water.
Low-water protection. The pump and in particular
the mechanical seal must not run dry. Low-water
protection should be provided by the customer by
fitting the relevant parts from the Wilo range of
accessories.
The speed of the pump can be controlled when
connected to a frequency converter or motor filter
(see paragraph 5.3)
4.2 Components supplied
• EM or DM version of pump,

• Installation and operating instructions

4.3 Accessories
Accessories must be ordered separately.
• WV/COL switching unit with relevant accessories
for automation,
• CO-ER switching unit with relevant accessories
for automation,
• Low-water protection:
– WMS kit for direct connection to the supply
pipe,
– WAEK 65 float switch with small switching unit
(only for EM version),
– WA 65 float switch,
– SK 277 with 3 dipped electrodes,
• WVA pressure switch,
Installation and operating instructions - Wilo-Economy-MHI
• Wilo fluid control (EK),
• Installation switching:
– WA 065 float switch
– WA OEK 65 float switch with small switching
unit (only for EM version).

5. Assembly and Installation

5.1 Installation
Fig. 2 shows a typical pump installation. Instal-
lation and assembly instructions, which must be
observed with this type of operation, are listed as
follows:
• Before installing the pump, make sure that all
welding and soldering on the pipe system has
been completed and that the pipe system has
been completely flushed out. Foreign bodies and
dirt will damage the pump.
• Install the pump in a dry place free of frost.
• Leave room for maintenance work to be carried out.
• The motor ventilator inlet must be kept clear, at
least 0.30 m from the wall to the rear.
• Install in a horizontal and flat position.
• The pump must be held in place with two 8mm
diameter screws, on a vibration-absorbing base.
Commercially available rubber-metal connectors
can also be used to hold it in place and absorb
vibra tions.
• To ensure that the drain valve can be accessed,
the pump must be installed with the drain valve
at least 20 mm above the floor.
• Isolating valves (1) should be installed in front of
and behind the pump, so that the pump can be
easily changed and/or maintenance work can be
carried out more easily.
• A backflow preventer (2) should be installed
immediately behind the outlet pressure gland
of the pump.
• The inlet and outlet pipes should be connected
to the pump without stress. Flexible lengths
of pipe or bellow expansion joints of restricted
length can be used to ensure a low-vibration
connection. The weight of the pipework must be
supported.
• The customer should take suitable measures to
prevent low water levels and hence guard against
the pump running dry in order to protect the me-
chanical seal. The Wilo range comprises various
accessories which can be used for this purpose.
• The customer should protect the pump at the
inlet pipe with a strainer (1mm mesh) or filter
connection (5) to avoid the pipe being damaged
by any dirt which may be sucked in.

5.2 Electrical installation

Electrical work must be carried out by a qualified and
licensed electrician in strict compliance with local
regulations.
• The electricity supply must be connected via a
rigid supply cable fitted with a coupler or an
all-pole switch with a contact gap of at least
3mm in accordance with the local regulations
in force (e.g. in accordance with the latest edition
of IEE wiring regulations).
• Check the mains current and voltage.
• Ensure compliance with the data on the pump
rating plate.
English
15