Toshiba ESTIA R32 HWT-401HW-E Manual page 91

Air-to water heat pump

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Table of Contents

Installation instructions

MB Interface

• Disconnect the Hydrobox from the power supply.

• Secure the interface next to the Hydrobox (wall mounting). Observe the instructions in the

Safety instructions

figure below or install the interface in the Hydrobox (while following the

above safety instructions).

WARNING

• Connect the interface with the A B bus to any point on the bus. The A B bus is the bus

Follow carefully these safety and installation instructions. Improper work may lead to serious harmful for your health and also may damage seriously the interface

and/or the Hydro unit.

that connects the Hydrobox to the wired remote control. It is a two-wire bus that connects

 This interface must be installed by accredited technical personnel (electrician, installer, or technical personnel) and following all the safety instructions.

 Before manipulating the Hydro unit, be sure it is completely disconnected from Mains power.

 Do not modify the unit. (A fire or an electric shock may occur)

connections A and B. The A B connection does not have a special polarity.

 This interface must only be installed in a restricted access location by user.

• Connect the RS-485 bus to the RS-485 connection terminal of the interface.

 Do not install the unit in any of the following places.

 Humid or wet place

• After closing the Hydrobox, reconnect it to the power supply.

 Dusty place

 Place exposed to direct sunlight

• Follow the instructions in the user manual to configure and commission the interface.

 Place where there is a TV set or radio within one meter

 Place exposed to rain (outdoors, under eaves, etc.)

• Follow the instructions on the next page to configure the interface via the integrated DIP

 Use predefined cable and connect them certainly. Keep the connecting terminal free from external force.

It may cause an exothermic or a fire.

 Strip the insulation from the cable that connects to the connector (RS-485 and A B bus) following the dimensions shown in the diagram below.

switch.

 When connecting the cable to the connector (RS-485 and A B bus), ensure the core wires do not protrude from the connector.

 Use two-core cabtyre cable.

NOTE

Installation instructions

The cable for connecting the BMS-IFMB0AWR-E to the A B bus can be any two-wire cable insulated in accordance with

 Disconnect the Hydro unit from Mains Power.

the specifications. The maximum distance for the A B bus is 50 meters. Further details can be found in the Hydrobox

 Fix the interface beside the Hydro unit (wall mounting) following the instructions in the diagram below or install it inside the Hydro unit (respect the safety

instructions given above).

user manual.

 Connect the interface to A B bus in any point of the bus. The A B bus is the bus that connects the Hydro unit and the wired remote controller, is a two-wire bus

Observe the maximum distance of 500 meters for the bus; no loop or star topologies are permitted for the RS-485 bus;

connecting terminals A B of both, this A B connection has no specific polarity.

 Connect the RS-485 bus to the connector RS-485 of the interface.

a terminating resistance of 120 Ω must be present at each end of the bus in order to prevent signal reflections. A fail-

 Close the Hydro unit and reconnect it to Mains Power.

safe biasing mechanism must also be present.

 Follow the instructions on the user manual for configuring and commissioning the interface.

 Follow the instructions of the next page to configure the interface through on-board DIP-switches.

IMPORTANT

NOTE

• Only ever use one remote control. No additional remote controls can be used if you

The cable used for connection of BMS-IFMB0UEW-E to A B bus can be any two-core cabtyre cable, the maximum distance for bus A B is 50 meters, consult the

connect this interface.

manual of the Hydro unit for more details.

Respect the maximum distance of 500 meters for the bus, no loop or star topologies are allowed for RS-485 bus, a terminator resistor of 120 Ω must be present at

• You cannot connect or mix Hydroboxes from series 4 and series 5.

each end of the bus to avoid signal reflections and also a fail-safe biasing mechanism.

IMPORTANT:

 Use only one remote controller. A sub-remote controller cannot be connected when connecting this interface.

 It is not possible to mix and connect Hydro unit 4 series, 5 series, and R32 1 series (WM and AIO type).

 Group connection for BMS-IFMB0UEW-E is up to 6 units.

NOTE

In its place there is a pair of cables to connect the Remote Controller. Use these cables to connect the AB bus. Check your Hydro unit user or service manual for

more information.

-EN

Hydro Unit

The terminal block in

the hydro unit.

4 series and 5 series:

TB07

R32 1 series

TB04

Connection to A B bus.

Two-core cabtyre cable.

Max. 50 m