Honeywell Multiple Meter Units Bedienungsanleitung

62-0400-01

INSTALLATION INSTRUCTIONS

Honeywell Multiple Meter

Units (MMU)

KWH AND KWH/DEMAND

HONEYWELL MULTIPLE METER UNITS (MMU)

62-0400-01 2

TABLE OF CONTENTS

Section 1.0 Safety Label Definitions and Information 4

Section 2.0 Precautionary and Safety Information 5

Section 3.0 Introduction to Multiple Meter Units (MMUs) 6

Section 3.1 Application 6

Section 3.2 General Description 6

Section 4.0 Description of Multiple Meter Units (MMUs) 7

Section 4.1 Class 100/200 Meters 7

Section 4.2 Class 320 Meters 7

Section 4.3 Green Class Meters 7

Section 4.4 IDR (Interval Data Recorders) 7

Section 5.0 MMU Cabinet Installation 8

Section 5.1 MMU Cabinet Description 8

Section 5.2 MMU Cabinet Installation 8

Section 6.0 MMU Cabinet Wiring 10

Section 6.1 MMU Cabinet Wiring 10

Section 6.2 MMU Cabinet Wiring 11

Section 6.3 MMU Cabinet Wiring 11

Section 7.0 Individual Meter Wiring Diagrams and Installation Procedures 12

Section 7.1 Class 100, 200, and Green Class Meter Wiring Diagrams

and Installation Procedures

Section 7.2 Class 320 Meter Wiring Diagrams and Installation

Procedures

Section 7.3 IDR (Interval Data Recorders) Wiring Diagrams and

Installation Procedures

Appendix A System Wiring Guides 14

Appendix B System Wiring Guides 15

Appendix C Modern System Configuration Diagrams 16

Appendix D Hard Wired System Configuration Diagrams 17

Appendix E Hard Wired System Configuration Diagrams (Continued) 18

Section 8.0 Troubleshooting 19

Section 9.0 Meter Technical Specifications 19

Section 10.0 Meter Limited Warranty 20

HONEYWELL MULTIPLE METER UNITS (MMU)

3 62-0400-01

1.0 SAFETY LABEL DEFINITIONS AND

INFORMATION

The MMU Style Meter may contain one or more of the following labels. Operator(s)

should familiarize themselves with the meaning of each label to minimize risk.

The presence of this label is a cautionary indicator identifying a

danger risk. The manual should be consulted prior to proceeding.

The presence of this label indicates an electrical shock hazard exists

in the location or area where the label is placed. Prior to proceeding,

the MAINS power must be disconnected and the manual consulted for

safety information.

HONEYWELL MULTIPLE METER UNITS (MMU)

62-0400-01 4

2.0 PRECAUTIONARY AND SAFETY

INFORMATION

CAUTION

Internal circuit card components are extremely sensitive to electrostatic

discharge. Be careful not to touch internal circuitry prior to discharging any

static buildup on your person. To discharge yourself, touch a grounded metal

object such as conduit or an earth-grounded metal enclosure.

CAUTION

High voltages present on main PCB terminal block TB1 screw terminals. Risk

of serious injury and/or electrical shock exists. Prior to performing any wiring

operations, review all contents of the user manual and de-energize the MAINS

power switch. Only qualified personnel should perform installation wiring.

Installation wiring must comply with all local and national electrical codes.

CAUTION

Failure to ground the enclosure creates a possible shock hazard. Do not

operate the MMU Style Meter without a protective earth wire attached securely

to the PE terminal screw. After installing protective earth wiring, secure the

screw tightly (7 N-m torque.)

CAUTION

NEVER open front panel of unit while unit has MAINS power applied. Failure to

comply can increase the risk of serious injury and/or electrical shock.

HONEYWELL MULTIPLE METER UNITS (MMU)

5 62-0400-01

3.0 INTRODUCTION TO MULTIPLE METER

UNITS (MMU)

3.1 Application

This Install Manual describes a line of Multiple Meter Units (MMU) used in monitoring

electrical usage in commercial, industrial, or institutional facilities. Voltage and current

are continuously measured and updated to provide highly accurate, true RMS power

information via current sensors.

3.2 General Description

The MMU allows for compact installation of multiple meters that allows for easy and

centralized reading. A single MMU cabinet can be configured to contain up to 8, 16, or

24 meters of different voltage configurations (i.e. 208V and 480V).

Fig. 1. MMU 8 Cabinet.

HONEYWELL MULTIPLE METER UNITS (MMU)

62-0400-01 6

4.0 DESCRIPTION OF MULTIPLE METER

UNITS (MMU)

MMU cabinets can be used to house Class 100, Class 200, Class 320 and Green

Class meters. IDRs, (Interval Data Recorders) can also be installed in the MMU

cabinets with the meters.

These units are briefly described below:

4.1 Class 100/200 Meters

The Class 100 and Class 200 meters are power meters for use in sub metering

applications. The devices take inputs from current sensors and the line voltage and

output kW hours in pulses.

Refer to Sections 5, 6, &7 for general installation instructions on installing Class 100 or

Class 200 meters into a MMU Cabinet.

4.2 Class 320 Meters

The Class 320 meter is a 3-element meter with communication. The device is used to

monitor electric power usage after the utility meter and store kW and kVAR data for

automatic meter reading.

Refer to Sections 5, 6, &7 for general installation instructions on installing Class 320

meters into a MMU Cabinet.

4.3 Green Class Meters

The Green Class Meter is a power meter for use in sub metering applications. The

devices take inputs from current sensors and the line voltage and output kW hours in

pulses.

Refer to Sections 5, 6, &7 for general installation instructions on installing Class 320

meters into a MMU Cabinet.

4.4 IDR (Interval Data Recorders)

The Interval Data Recorder (IDR) is an energy data collection device with

communication. The device is used to count digital pulses of the utility meter and store

data for automatic meter reading. Various communications types are provided, EZ7,

Modbus RTU, Modbus TCP/IP, BACnet MS/TP, BACnet IP, and Lonworks TP/FT-10.

Refer to Sections 5, 6, &7 for general installation instructions on installing IDR meters

into a MMU Cabinet.

HONEYWELL MULTIPLE METER UNITS (MMU)

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5.0 MMU CABINET INSTALLATION

5.1 MMU Cabinet Description

The MMU Cabinet is made from 14 or 16 gauge steel. The cabinet has an ANSI 61

gray exterior finish. It contains a seam that is continuously welded and ground smooth.

The heavy gauge continuous hinge pin that connects the door and the enclosure body

are removable. There are screw-down clamps located on the door for easy locking of

the cabinet.

Fig. 2. Cabinet Dimensions.

5.2 MMU Cabinet Installation

The dimensions of the MMU8, MMU16, and MMU 24 cabinet are shown in Figure 2.

The MMU cabinet shall be mounted in an upright orientation as shown in Figure 3. The

MMU cabinet must only be installed by personnel with the proper electrical licensing

for the intended location.

Use appropriately sized mounting hardware to fasten the MMU enclosure to the

selected mounting surface. The four housing mounting holes are located on the upper

and lower mounting brackets.

Serviceability/field Repair Service and repair should be completed by qualified

personnel only. Meters cannot be calibrated in the field. Adjustment is limited to reset

of the meter display and should be performed by qualified personnel only. The

configuration is stated on each meter nameplate.

The MMU enclosure is not supplied with knockouts. The installer will make the

necessary entrances to the enclosure to supply entry for the voltage and current

sensor conductors. The conduit and fittings must be appropriate for the application and

installed in a manner to meet national and local electrical codes.

M34287

SIDE VIEWFRONT VIEW

(178)

3-3/8

(86)

(51) 7/16 (11)

DIA

1-1/4 (32)

3-3/8

(86)

DOOR

CLAMP

PADLOCKING

HASP

MMU

DIMENSIONS

IN INCHES AND (MM)

AB C

HMMU-8

HMMU-16

HMMU-24

24 (610)

30 (762)

12 (305)

20 (508)

24 (610)

1-1/4 (32)

3 (76)

MMU

METER

CONFIGURATION TA S K

METER

SPACES

ACROSS DOWN

HMMU-8

HMMU-16

HMMU-24

2 (51)

4 (102)

5 (127)

4 (102)

5 (127)

8 (203)

16 (406)

24 (610)

5/8

(16)

7/16

(11)

HONEYWELL MULTIPLE METER UNITS (MMU)

62-0400-01 8

Spaces not occupied by meters will have a blank metal cover over the display window.

Fig. 3. Example of an 8 Meter MMU Enclosure.

HONEYWELL MULTIPLE METER UNITS (MMU)

9 62-0400-01

6.0 MMU CABINET WIRING

6.1 General Wiring Instructions

Wiring of the individual MMU meters are the same as for a stand-alone meter. See

section 7.0.

Refer to the Individual Meter Installation Manual for individual meter wiring.

Fig. 4. MMU Terminal.

Some MMU units may come from the factory already pre-wired for the voltage to the

installed meters. When supplied this way, there will be a terminal block located inside

the MMU that is labeled A, B, C, N. See Figure 4. The letters refer to the three phases

and neutral connections already made to the meters. The power only has to be landed

on the terminal block in order to power all of the meters in the MMU.

As with the stand-alone meters, the power wires must be fused. The size of the fuse

will be determined by the number of meters installed in the MMU. The Littelfuse KLDR

series are used for this component. Each meter point requires 1/10 amp fusing. With 8

meters, a one amp fuse would be acceptable.

The current sensor wiring is installed by bringing in the leads from their source and

landing them on the appropriate terminals on the meter’s sensor input terminals.

The proper current sensor wiring to each meter is described in each individual Meter

Installation Manual.The MMU style meters are wired the same way, but it is important

that proper routing procedures are followed when the current sensor conductors are

installed.

M33744

HONEYWELL MULTIPLE METER UNITS (MMU)

62-0400-01 10

a. The sensor leads cannot be installed randomly and should be bundled

together when they are routed to the meters which are mounted on the door

of the MMU. They shall be secured and routed away from the power wiring

and the communication cabling. They shall be bundled with appropriate

means such as clamps, wire ties, spiral wrap, etc.

b. To avoid damage to the bundled conductors when the door is opened and

closed, tubing, guides, spiral wrap, clamps, or other approved means shall

be used. This is required to provide proper protection and stress relief for the

conductors.

c. All wiring is to be routed away from any points that may possibly damage or

abrade the insulation - such as sharp edges, screw threads, burrs, or any

other item that may have been installed in the MMU enclosure. The final wir-

ing must allow the door to freely open and close without coming in contact

with anything that could damage it.

NOTE: Following the proper wiring procedures will help to assure a satisfactory

installation.

NOTE: Units housed in UL type 1 enclosures must only be installed in indoor loca-

tions, where they will not be affected by the elements

6.2 Grounding

The meters and enclosure must be prop-

erly grounded for safety. A protective earth

ground lug is provided for this purpose.

Failure to ground the enclosure creates a

possible shock hazard. There are two ter-

minals that attach to the base ground stud.

Do not operate without protective earth

wire attached securely to the PE terminal

screw. After installing the protective earth

wiring, secure the screw tightly (7 N-m

torque).

Fig. 5. Base Ground Stud.

6.3 RS485 Communication Wiring

The RS485 Communication wiring is installed by connecting the leads to the

appropriate terminals on the 3-position RS485 terminal strip mounted on the back

panel of the enclosure. The wiring terminals are labeled GND, HIGH, and LOW to

correspond to the appropriate connections of the communication cabling. Tighten the

terminals to 9 in-lbs of torque.

Class 1 rated, Belden 1120A cable (600V) is to be used

for communication wiring in MMU enclosures. The communication cabling must be

routed away from the mains wiring.

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