Pump relay box 3-6 groups 230V – code: MREL6U – Climma

Pump relay box 3–6 groups 230 V – Climma/VECO (code MREL6U)

The MREL6U pump relay box is a spare part dedicated to marine air conditioning systems Climma/VECO in which multiple units share a single seawater pump. Its role is to automatically manage the activation of the pump when at least one of the units requires operation, keeping it running as long as necessary. This simplifies the management of the seawater circuit and avoids the installation of a dedicated pump for each air conditioner.

The product is identified by the Climma code MREL6U and is suitable for systems with 230 V AC power supply, managing 3–6 units and with maximum current of the pump up to 30 A.

Features and details verified

Main data

• Product code (Climma): MREL6U
• Type: relay box for seawater pump control
• Power Supply: 230 V AC
• Maximum manageable current (pump): 30 A
• Number of manageable units: from 3 to 6 units
• Application: marine air conditioning systems Climma/VECO
• Original spare part: yes

Function of the relay box

The MREL6U is designed to control a single seawater pump shared by 3 to 6 air conditioning units. When any unit requests cooling, the relay box activates the pump; the pump remains running as long as at least one unit is operational. This control logic allows coordinated management of the seawater circuit, useful in multi-unit configurations typical of onboard systems.

Typical applications (nautical and onboard plant engineering)

This replacement is intended for installations where the marine air conditioning system is organized with multiple units connected to a common seawater circuit. In particular, the relay box is used in:

• systems Climma/VECO with 230 V AC power supply;
• configurations with single seawater pump shared among multiple users;
• systems with 3–6 units air conditioning that require centralized pump control.

In maintenance, replacing the relay box is typically considered when anomalies are detected in pump management (for example, starts inconsistent with unit requests) or when restoring the original system configuration with a dedicated component is desired.

Operational advantages

• Centralized pump management: a single control point for the seawater pump when multiple units are present.
• Automatic activation logic: the pump is controlled based on the requests of the connected units.
• Orderly system configuration: useful when avoiding having a dedicated pump for each air conditioner.
• Original spare part: recommended to maintain consistency with the Climma/VECO architecture provided by the manufacturer.

Usage and notes for selection/replacement

For correct selection of the relay box, it is important to verify that the system corresponds to the intended usage conditions:

• Power Supply: system with 230 V AC.
• Number of units: presence of 3–6 units connected to pump management.
• Shared pump: configuration with a single seawater pump common.
• Maximum current: pump within 30 A (maximum data indicated for the component).

Product information

• SKU: VEC000000013
• Supplier: VECO S.P.A.
• Supplier product code: MREL6U

FAQ – Frequently Asked Questions

What is the MREL6U pump relay box used for?

It is necessary to control a single seawater pump shared by multiple air conditioning units: activate the pump when at least one unit requires operation and keep it active as long as necessary.

How many air conditioning units can the MREL6U manage?

The MREL6U is suitable for systems with a number of units between 3 and 6, connected to the management of the common pump.

What is the power supply intended for this relay box?

The power supply indicated for the MREL6U relay box is 230 V AC.

What is the maximum current supported for the pump?

The maximum current indicated for the pump controlled by the relay box is 30 A.

Is it an original Climma/VECO spare part?

Yes, the MREL6U is indicated as an original replacement for Climma/VECO marine air conditioning systems.