Scope Of Supply; Accessories; Siting/Installation; Electrical Wiring - Wilo -IPn serie Einbau- Und Betriebsanleitung

ENGLISH
can be infinitely varied if used in conjunction with the
respective control gear (Wilo-CR/DR-systems). This
will enable an optimum adaption of pump perform-
ance to actual load demands and an economical
pump operation.
Motors of power ratings P2 ≥11 kW are equipped
each with 3 PTC thermal sensors.
– IPn: The pump housing is of the Inline design
with suction and discharge connection axially in
line (Fig. 1). Pumps with impeller sizes 180 mm
and larger to be base mounted.
– DPn: Two pump heads mounted in a common
housing (twin pump), the pump housing being of
Inline design (Fig. 2).
When used in conjunction with an automatic variable
speed controller only the base-duty pump is operated
variably. The second pump remains available for
parallel operation to cover peak-load demand and
additionally, for standby duty to take over under fault
conditions.
– Bn: Cast iron spiral volute end-suction housing
with axial suction and radial discharge con-
nections (Fig. 3).

4.2 Scope of supply

IPn:
– Single pump,
– Impeller size 180 mm and larger: 3 brackets and
sundries for base mounting,
– Installation and operating instructions.
DPn:
– Twin pump,
– 3 brackets and sundries for base mounting,
– Installation and operating instructions.
Bn:
– Close coupled end suction pump,
– Installation and operating instructions.

4.3 Accessories

– PTC trip relay for switchboard mounting.

5. Siting/Installation

5.1 Installation
– Installation only after all welding/soldering on the
pipework is completed and the pipe system has
been flushed out. Foreign matter and impurities
may cause damage to the pump.
– Mounting in a well ventilated space.
– Mount the pump in an easily accessible position
in order to facilitate later inspections or exchange.
12
– Provide and place a hook or eyebolt of respective
load bearing capacity (total weight of pump: see
catalogue/data sheet) vertically above the pump,
suitable for taking lifting gear or other mechanical
aids capable of handling the pump for mainte-
nance or repairs.
– Minimum axial clearance between a wall and the
motor fan cowl: clearance required for removal +
diameter of fan cowl.
– Isolating valves must be provided and installed on
suction and discharge ports in order to avoid
draining the whole pipe system when servicing or
exchanging the pump.
– Pump must be mounted free of stress from
adjoining pipework.
– Any mounting position except "Motor down-
wards" is permissible. When mounted with the
motor shaft in a horizontal plane the motor must
be additionally supported.
Mounting positions: IPn
– The motor terminal box must not face down-
wards. If necessary, the motor housing can be
turned after undoing the internal hexagon bolts.
CAUTION! When turning, take care not to
damage the housing gasket.
– Direction of flow must correspond to the arrow on
the pump housing.
CAUTION! When sucking from tank ensure that
there is always a sufficiently high
liquid level above the pump suction
port to avoid dry-running of the
pump. The minimum inlet pressure
must be maintained.
CAUTION! For units which are be insulated, only
the pump-housing may be insulated.
The motor and the lantern must
remain free from blockages (Fig. 6,
Pos. 1.6-1.10).

5.2 Electrical wiring

– All electrical wiring to be carried out
by qualified and licensed electricians
in strict conformity to ruling local
regulations.
– All wiring and external gear must comply with
ruling regulations (use of conduits, all-pole
switches, air gaps, etc. in accordance with the
latest edition of IEE wiring regulations).
see Fig. 1
DPn see Fig. 2
Bn see Fig. 3