Wilo HC 20.1+EMU FA Instrucciones De Instalación Y Funcionamiento página 20

en-US
6.4.1 Instructions for double pump op-
eration
Fig. 3: Minimum distances
6.4.2 Maintenance work
20
Installation and electrical connection
NOTICE
Use only technically faultless lifting equipment!
Use only technically faultless lifting equipment to lift and lower the pump. Make sure
that the pump does not jam during lifting and lowering. Do not exceed the maximum
bearing capacity of the lifting equipment! Check that lifting equipment is functioning
properly before use!
▪ Prepare operating space/installation site as follows:
– Clean, cleaned of coarse solids
– Dry well
– Frost-free
– Decontaminated
▪ If toxic or suffocating gases build up, immediately take countermeasures!
▪ Attach the lifting gear to the attachment point using a shackle. Only use technically ap-
proved lifting gear.
▪ Use lifting gear for lifting, lowering and transporting the pump. Never pull the pump by the
power supply cable!
▪ Lifting equipment must be safely installed. The storage location as well as the operating
space/installation site must be accessible with the lifting equipment. The storage location
must have a firm surface.
▪ The routed power supply cables must allow safe operation. Check whether the cable cross
section and the cable length are sufficient for the selected installation type.
▪ When using switchgear, the corresponding IP class must be observed. Install switchgear in a
manner that is overflow-proof and outside potentially explosive areas!
▪ Avoid air intake into the fluid, use guide or deflector plates for the inlet. Entrained air can
collect in the pipe system and lead to impermissible operating conditions. Eliminate air
pockets via the ventilation system!
▪ Dry running of the pump is forbidden! Avoid air pockets in the hydraulics housing or in the
pipe system. Never fall below minimum water level. The installation of a dry-running pro-
tection is recommended!
If several pumps are used in an operating space, minimum distances between the pumps and
the wall must be complied with. Here there is a difference in the distances depending on the
type of system: Alternating operation or parallel operation.
d Diameter of the hydraulics housing
Minimum distance from the wall:
A - alternating operation: min. 0.3 × d
1
- parallel operation: min. 1 × d
Distance discharge pipes
A - alternating operation: min. 1.5 × d
2
- parallel operation: min. 2 × d
After a storage period of more than 6 months, carry out the following maintenance tasks
before installation:
▪ Rotate the impeller.
▪ Check the oil in the sealing chamber.
▪ Check the coolant.
WILO SE 2019-01