Lochinvar BMS Istruzioni di montaggio
LV 311273 | June 2022
0311273 R2.1 / 2622 - Changes Reserved
Installation, Commissioning &
User Instructions
BMS Interface
These instructions must be read and understood before installing, commissioning, operating
or maintaining the equipment.
IMPORTANT INFORMATION
!
3
Read this manual
carefully
Trademarks
Liability
More information
Warning
Read this manual carefully before starting the BMS Interface. Failure to read the manual
and to follow the printed instructions may lead to personal injury and damage to the BSM
Interface, water heater or any other equipment.
Copyright © 2013
All rights reserved.
Nothing from this publication may be copied, reproduced and/or published by means of
printing, photocopying or by whatsoever means, without the prior written approval of the
supplier.
The supplier reserves the right to modify specifications stated in this manual.
Any brand names mentioned in this manual are registered trademarks of their respective
owners.
The supplier accepts no liability for claims from third parties arising from unauthorised
use, use other than that stated in this manual, and use other than in accordance with the
General Conditions registered at the Chamber of Commerce.
Refer further to the General Conditions. These are available on request, free of charge.
Although considerable care has been taken to ensure a correct and suitably
comprehensive description of all relevant components, the manual may nonetheless
contain errors and inaccuracies.
Should you detect any errors or inaccuracies in the manual, we would be grateful if you
would inform us. This helps us to further improve our documentation.
If you have any comments or queries concerning specific aspects related to the BMS
Interface, then please do not hesitate to contact the supplier of the BMS Interface.
In the event of problems with your electricity or water supply connections, please contact
the supplier/installation engineer of your installation.
Installation, Commissioning & User Instructions
4
Content
1
1.1
1.2
2
2.1
2.2
2.3
3
4
4.1
4.2
5
5.1
5.2
5.3
6
6.1
6.2
Lay-out .......................................................................................................................... 5
Introduction ..................................................................................................................... 5
Lay-out ........................................................................................................................... 5
Mounting and Installing ............................................................................................... 6
Introduction ..................................................................................................................... 6
Mounting ......................................................................................................................... 6
Connecting ..................................................................................................................... 6
Settings ......................................................................................................................... 9
Data readout ................................................................................................................. 10
Introduction .................................................................................................................... 10
Parameters ................................................................................................................... 11
Errors ........................................................................................................................... 13
Introduction ................................................................................................................... 13
Lock-out codes ............................................................................................................. 14
Blocking codes .............................................................................................................. 14
Status .......................................................................................................................... 15
Introduction ................................................................................................................... 15
Status water heater ...................................................................................................... 15
Installation, Commissioning & User Instructions
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1 Lay-out
1.1 Introduction
1.2 Lay-out
The BMS Interface is an interface that is used to connect a building management system
(BMS) to the control of a EcoCharger. The communication, between the BMS and the
EcoCharger, will be handled via a Modbus communication protocol and is meant for
reading the data of the connected water heater. The BMS Interface does not have its
own display or push buttons.
Schematic sketch BMS Interface
IMD-1155 R0.0
The BMS Interface will be supplied as in the pictured below, with a black plastic housing.
Installation, Commissioning & User Instructions
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2 Mounting and Installing
2.1 Introduction
2.2 Mounting
2.3 Connecting
This chapter covers the following topics:
• Mounting the BSM Interface;
• Connecting the BMS Interface between the water heater and BMS.
The BMS Interface is supplied with the following components:
- power supply cable;
- communication cable to connect the BMS Interface to the control of the water heater;
- communication cable to connect the BMS Interface to the building management
system (Modbus).
Note
Mount the BMS Interface near the water heater.
The BMS Interface should be mounted in the following way:
1. Remove the cover of the BMS Interface
2. Mount the rear side of the BMS Interface to the wall with fitting plugs.
The BMS Interface should be connected to the BMS and water heater in the following
way:
1. Connect the power supply cable to the connector
on the upper right side of the BMS Interface.
Connect the other side of the cable to the mains
power supply by using a double-pole isolator.
Note
Fit cable in the strain relief.
Attention
Do not power up the system until all the electrical
connections have been made.
2. Connect the communication cable to the water
heater, via the pull relief, to the two way connector
on the lower right side of the BMS Interface.
Note
Fit cable in the strain relief.
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3. Connect the communication cable to the BUS link
connections (X5 and X6) on the far right side of
the electrical connection box on top of the water
heater.
Note
Fit cable in the strain relief.
Max. length communication cable
It is possible to select another, longer
communication cable for the communication
between the BMS Interface and the water heater.
The maximum length of the cable depends on the
cable diameter, see the table.
Cable diameter
[mm2]
Max. cable length
[m]
0,25 100
0,50 200
0,75 300
1,00 400
1,50 600
4. Connect the communication cable, for Modbus connection to the two connectors on
the lower side of the BMS Interface.
Note
Fit cable in the strain relief.
Attention
First connect the twelve way connector containing the ground wire, next the four way
connector can be connected.
5. Connect the Modbus communication cable
to the BMS in the required way. For this
purpose use the connectors which are
supplied together with the BMS Interface.
Note
Fit cable in the strain relief.
Installation, Commissioning & User Instructions
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6. Connect the cable from the BMS to the supplied contra connector. First lead the
cable through the strain relief. This three wire cable (2 wires + PE) is not supplied
with the BMS Interface. Make sure that the wires are connected in the right
sequence.
Attention
For optimal communication between the BMS Interface and the BMS, the cable must be
shielded twisted pair with a maximum length of 1200 meters.
7. Finally, place the supplied clip over the connector and use this to lock both connector
parts. All the wiring has now been connected properly.
1 = brown Modbus 1 - Tx+
2 = white Modbus 1 - Tx-
3 = yellow/green Earth
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3 Settings
To approach the BMS Interface, from the BMS, some settings need to be made in order
to make the communication possible.
Setting Value
Type Modbus RTU
Baud rate 9600
Initial address 247
Data bits 8
Parity None
Stop bits 1
Installation, Commissioning & User Instructions
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4 Data readout
4.1 Introduction
The BMS Interface supplies data, in a Modbus format, to the BMS. The user will receive
this data and needs to process this. The attached parameter list can be used.
Pay special attention to some of the data that has to be converted into the wright format
before receiving the expected values. The required conversions are also a part of the
table given on the next page.
ATTENTION:
The parameters mentioned in the table are all of the type “read only”. The only exception
is parameter 0, which is “read/write”.
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