FAQs

Q?

Can the pump be operated using a frequency converter?

A.

Primo offers numerous speed-controlled pumps that are referred to as ‘E-pumps’ and which come equipped with Grundfos MGE motors with an integrated frequency converter. The manufacturing costs and material inputs are lower compared to pump solutions with external frequency converters. In addition, technical issues that may arise in connection with external frequency converters are avoided.
Finally, MGE motors have numerous additional features and advantages. In the event that no E-pump is available for a specific application, it is generally possible to operate the three-phase industrial motors offered by Grundfos via an external frequency converter. The technical information set out in the operating instructions and datasheet should be referred to in each individual case. .

Q?

Can the SP pumps also be operated in a horizontal position?

A.

SP submersible pumps with a Primo or other submersible motor can be operated in any position from horizontal to vertical. The motor is arranged below the pump. A cooling jacket is generally required for these installation positions. See separate entry on this issue.

Q?

Do I have to follow the instructions for Primo pumps?

A.

Yes, absolutely. The installation and operating instructions contain basic instructions which must be followed in connection with the installation, operation, and maintenance of the system. Hence, they must be read by the installer and the relevant personnel/owner prior to installation and commissioning. In addition, they must be available to personnel on site at all times.

Q?

Does the built-in excess temperature protection of the UPS pump need to be used?

A.

If excess temperature protection is not properly connected or bridged, the pump may be permanently damaged. In addition, this will also void the pump's warranty.

Q?

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A.

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Q?

Does the SQ/SQE have a soft start?

A.

Yes, the pump has an integrated soft start feature in order to reduce start-up current, thus assuring even, continuous acceleration.

Q?

Heating system filling water requirement?

A.

VDI Guideline 2035 Part 1 has been in effect since 2005, and VDI Guideline 2035 Part 2 has been in effect since 2009. These guidelines represent recognised rules of the technology. Ongoing technical advances as well as efficiency improvements and energy optimisation mean that modern heat generators and heating pumps are designed with lower tolerances than they were in the past. These technical advances have led to increased demands placed on the medium pumped in the system, as defined by VDI 2035.