Instructions For Double Pump Operation - Wilo Rexa PRO Serie Instrucciones De Instalación Y Funcionamiento

6.4.1 Instructions for double pump op-
eration
Installation and operating instructions Wilo-Rexa PRO
Installation and electrical connection
WARNING
Hand and foot injuries due to a lack of protective equipment!
During work there is a risk of (serious) injury. Wear the following protective equipment:
• Safety gloves that protect against cuts
• Safety shoes
• If lifting equipment is used, a protective helmet must also be worn.
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!
NOTICE
If the motor emerges during operation, observe the instructions for "non-immersed op-
erating mode"! If "non-immersed operating mode" is not specified, then emerging the
motor is strictly prohibited!
▪ 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!
▪ For lifting, lowering and transporting the pump use the handle. Never carry or drag 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.
▪ Attach lifting gear to the handle with a shackle. Only use technically approved lifting gear.
▪ 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 not in potentially explosive areas!
▪ Avoid air aeration of 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.
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